CA1050093A - Sealed thermostatic heater employing a heater and ptc thermistor - Google Patents
Sealed thermostatic heater employing a heater and ptc thermistorInfo
- Publication number
- CA1050093A CA1050093A CA240,007A CA240007A CA1050093A CA 1050093 A CA1050093 A CA 1050093A CA 240007 A CA240007 A CA 240007A CA 1050093 A CA1050093 A CA 1050093A
- Authority
- CA
- Canada
- Prior art keywords
- heater
- ptc thermistor
- ceramic
- sealed
- radiators
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- ACXGJHCPFCFILV-UHFFFAOYSA-M sodium;2-(4-chloro-2-methylphenoxy)acetate;3,6-dichloro-2-methoxybenzoic acid Chemical compound [Na+].COC1=C(Cl)C=CC(Cl)=C1C(O)=O.CC1=CC(Cl)=CC=C1OCC([O-])=O ACXGJHCPFCFILV-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
- B23K3/03—Soldering irons; Bits electrically heated
- B23K3/033—Soldering irons; Bits electrically heated comprising means for controlling or selecting the temperature or power
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
- A45D1/28—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for controlling or indicating the temperature
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
- A45D2001/004—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with a ceramic component, e.g. heater, styling surface
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/02—Heaters using heating elements having a positive temperature coefficient
Abstract
ABSTRACT OF THE DISCLOSURE
A sealed thermostatic heater for use in a hair curling iron or the like comprising a ceramic tube having at least one PTC
thermistor and at least two metallic radiators housed therein, said PTC thermistor being held by and between said radiators, said ceramic tube being sealed in a metal tube, and a heater in said metal tube electrically connected in series with said PTC thermistor.
The heater has a short temperature rise characteristic and has a small temperature difference between different points on the outer peripheral surface of the heater.
A sealed thermostatic heater for use in a hair curling iron or the like comprising a ceramic tube having at least one PTC
thermistor and at least two metallic radiators housed therein, said PTC thermistor being held by and between said radiators, said ceramic tube being sealed in a metal tube, and a heater in said metal tube electrically connected in series with said PTC thermistor.
The heater has a short temperature rise characteristic and has a small temperature difference between different points on the outer peripheral surface of the heater.
Description
~051~093 The present invention relates to a sealed thermostatic hèater which utilizes a resistance-temperature characteristic of a PTC (positive temperature coefficient) thermistor, and more particularly to such a sealed thermostatic heater suitable for use in a hair curling iron.
It is a first object of the present invention to provide a novel sealed thermostatic heater having a temperature rise char-acteristic which requires short time to reach a constant temperature after power on.
It is a second object of the present invention to provide a novel sealed thermostatic heater which has a small temperature difference among points on an outer peripheral surface of the heater.
Accordingly, the present invention provides a sealed thermostatic heater comprising a ceramic tube having at least one PTC thermistor and at least two metallic radiators housed therein, said PTC thermistor being held by and between said radiators, said ceramic tube being sealed in a metal tube, and a heater in said metal tube electrically connected in series with said PTC ther-mistor.
The invention will now be described in more detail byway of example only with reference to the accompanying drawings, in which:
Fig. 1 is a sectional view of a sealed thermostatic heater in accordance with one embodiment of the present invention.
Fig. 2 is a fragmentary sectional view of a cylindrical heater to be used in the above thermostatic heater.
Fig. 3 is a circuit diagram of the thermostatic heater.
Fig. 4 shows a temperature rise characteristic ~a~ 1 ~05a~D93 1 curve at a point X of the thermostatic heater.
Fig. 5 shows an operational characteristic curve of the thermostatic heater.
Fig. 6 is a sectional view of a sealed thermostatic heater in accordance with other embodiment of the present invention.
Fig. 7 is an electrical circuit diagram thereof.
Fig. 8 shows a resistance-temperature curve of the thermostatic heater of Fig. 6.
Fig. 9 shows a surface temperature distribution of the thermostatic heater of Fig. 6.
Fig. 10 shows a voltage characteristic of the thermostatic heater of Fig. 6.
Referring to Fig. 1, a cylindrical ceramic tube 1 as shown in Fig. 2 has a cylindrical heater 2 comprising a wire-wound heater or coated heater mounted on an outer peripheral surface of the ceramic tube 1. Terminal plates 3, 3' are attached to opposite ends of the cylindrical ceramic tube 1, one of the terminal plates, 3', being formed in a ring shape. Cylindrical, metallic radiators 4, 4' and a PTC thermistor 5 are housed in a hole formed in the ceramic tube 1 such that the PTC thermistor 5 is held by the metallic radiators 4, 4' therebetween.
A metal tube 6 having one end closed, a tubular insulator 7 housed in the tube 6~ an insulating circular plate 8, an insulating plate 9 having a reduced section which is adapted to be inserted into the ceramic tube 1 and bores through which lead wires i~50093 l extend~ and a resilient metal terminal lO are provided, the metallic radiators 4, 4' and the PTC thermistor 5 being urged toward each other by the resilient force of the metal terminal lO. A lead wire ll is connected to the metal terminal lO and a lead wire 12 is connected to the terminal plate 3', the lead wires ll and 12 being connected to a power supply (not shown).
As insulative sealing material 13 closes an opening of the metal tube 6. Fig. 3 shows an electrical circuit of the above sealed thermostatic heater in which the heater 2 and the PTC thermistor 5 are connected in series.
While one thermistor 5 is housed in the ceramic tube 1 in the above embodiment, a plurality of PTC thermistors may be housed in the ceramic tube l and a plurality of PTC thermistors may be connected in parallel as shown in Fig. 3.
Figs. 4 and 5 show an operation character-istic of the thermostatic heater of the present invention. Upon power on, the resistance of the PTC
thermistor is so low that most of the power supply voltage E is applied to the cylindrical heater 2.
As a result, the heater 2 operates at a point Al in Fig. 5 so that the heater 2 generates heat and the surface temperature of the tube 6 rapidly rises.
Thereafter, when the PTC thermistor 5 reaches a predetermined temperature, the resistance thereof-suddenly increases, attenuating the current to stabilize itself at a fixed temperature. That is, it stabilizes at a point A2 in Fig. 5. In Fig. 5, 1~50093 1 a curve al shows an initial current-voltage character-istic curve of the PTC thermistor 5, a curve a2 shows a stabilized current-voltage characteristic curve of the PTC thermistor 5, and a curve b shows a load curve of the cylindrical heater 2.
- With the sealed thermostatic heater of the above construction in accordance with the present invention, the following advantages are presented.
(1) The surface temperature rise rate is very fast. For example, for a cylindrical heater (outer diameter 16 mm, length 60 mm) having a resistance of 250 Q and a PTC thermistor (outer diamet;er 10 mm, thickress 4 mm) having a resistance of 15 Q at 25C
and a Curie point of 230C at which the resistance thereof suddenly increases, the temperature at the point X (see Fig. 1) reached 200C one and a half minutes after the power on with an applied voltage of A.C. 100 V~ and showed a maximum temperature of 260C
in 2.6 minutes, and thereafter the temperature fell and stabilized at 192C after 4 minutes. The initial current was 330 mA and the stabilized current was - 1~3 mA~ as seen from the above experimental result, the temperature rise characteristic on the outer peripheral surface of the thermostatic heater has been remarkably improved.
It is a first object of the present invention to provide a novel sealed thermostatic heater having a temperature rise char-acteristic which requires short time to reach a constant temperature after power on.
It is a second object of the present invention to provide a novel sealed thermostatic heater which has a small temperature difference among points on an outer peripheral surface of the heater.
Accordingly, the present invention provides a sealed thermostatic heater comprising a ceramic tube having at least one PTC thermistor and at least two metallic radiators housed therein, said PTC thermistor being held by and between said radiators, said ceramic tube being sealed in a metal tube, and a heater in said metal tube electrically connected in series with said PTC ther-mistor.
The invention will now be described in more detail byway of example only with reference to the accompanying drawings, in which:
Fig. 1 is a sectional view of a sealed thermostatic heater in accordance with one embodiment of the present invention.
Fig. 2 is a fragmentary sectional view of a cylindrical heater to be used in the above thermostatic heater.
Fig. 3 is a circuit diagram of the thermostatic heater.
Fig. 4 shows a temperature rise characteristic ~a~ 1 ~05a~D93 1 curve at a point X of the thermostatic heater.
Fig. 5 shows an operational characteristic curve of the thermostatic heater.
Fig. 6 is a sectional view of a sealed thermostatic heater in accordance with other embodiment of the present invention.
Fig. 7 is an electrical circuit diagram thereof.
Fig. 8 shows a resistance-temperature curve of the thermostatic heater of Fig. 6.
Fig. 9 shows a surface temperature distribution of the thermostatic heater of Fig. 6.
Fig. 10 shows a voltage characteristic of the thermostatic heater of Fig. 6.
Referring to Fig. 1, a cylindrical ceramic tube 1 as shown in Fig. 2 has a cylindrical heater 2 comprising a wire-wound heater or coated heater mounted on an outer peripheral surface of the ceramic tube 1. Terminal plates 3, 3' are attached to opposite ends of the cylindrical ceramic tube 1, one of the terminal plates, 3', being formed in a ring shape. Cylindrical, metallic radiators 4, 4' and a PTC thermistor 5 are housed in a hole formed in the ceramic tube 1 such that the PTC thermistor 5 is held by the metallic radiators 4, 4' therebetween.
A metal tube 6 having one end closed, a tubular insulator 7 housed in the tube 6~ an insulating circular plate 8, an insulating plate 9 having a reduced section which is adapted to be inserted into the ceramic tube 1 and bores through which lead wires i~50093 l extend~ and a resilient metal terminal lO are provided, the metallic radiators 4, 4' and the PTC thermistor 5 being urged toward each other by the resilient force of the metal terminal lO. A lead wire ll is connected to the metal terminal lO and a lead wire 12 is connected to the terminal plate 3', the lead wires ll and 12 being connected to a power supply (not shown).
As insulative sealing material 13 closes an opening of the metal tube 6. Fig. 3 shows an electrical circuit of the above sealed thermostatic heater in which the heater 2 and the PTC thermistor 5 are connected in series.
While one thermistor 5 is housed in the ceramic tube 1 in the above embodiment, a plurality of PTC thermistors may be housed in the ceramic tube l and a plurality of PTC thermistors may be connected in parallel as shown in Fig. 3.
Figs. 4 and 5 show an operation character-istic of the thermostatic heater of the present invention. Upon power on, the resistance of the PTC
thermistor is so low that most of the power supply voltage E is applied to the cylindrical heater 2.
As a result, the heater 2 operates at a point Al in Fig. 5 so that the heater 2 generates heat and the surface temperature of the tube 6 rapidly rises.
Thereafter, when the PTC thermistor 5 reaches a predetermined temperature, the resistance thereof-suddenly increases, attenuating the current to stabilize itself at a fixed temperature. That is, it stabilizes at a point A2 in Fig. 5. In Fig. 5, 1~50093 1 a curve al shows an initial current-voltage character-istic curve of the PTC thermistor 5, a curve a2 shows a stabilized current-voltage characteristic curve of the PTC thermistor 5, and a curve b shows a load curve of the cylindrical heater 2.
- With the sealed thermostatic heater of the above construction in accordance with the present invention, the following advantages are presented.
(1) The surface temperature rise rate is very fast. For example, for a cylindrical heater (outer diameter 16 mm, length 60 mm) having a resistance of 250 Q and a PTC thermistor (outer diamet;er 10 mm, thickress 4 mm) having a resistance of 15 Q at 25C
and a Curie point of 230C at which the resistance thereof suddenly increases, the temperature at the point X (see Fig. 1) reached 200C one and a half minutes after the power on with an applied voltage of A.C. 100 V~ and showed a maximum temperature of 260C
in 2.6 minutes, and thereafter the temperature fell and stabilized at 192C after 4 minutes. The initial current was 330 mA and the stabilized current was - 1~3 mA~ as seen from the above experimental result, the temperature rise characteristic on the outer peripheral surface of the thermostatic heater has been remarkably improved.
(2) - The unevenness in the surface temperature is small. Since the PTC thermistor self-heats and the heat generated thereby is effectively transmitted to the opposite ends of the heater, the unevenness in the temperature is very small. Furthermore, even if ~OS0~93 1 the PTC thermistor is small, an allowable power dis-sipation may be large because of high heat dissipation effect.
(3) High reliability. Since the PTC thermistor is used rather than a blmetal strip switch~ the contactless temperature control is attained without using any movable parts. Therefore the reliability is very high. The stability of the connection against heat expansion and contraction is fully insured because it is compressively held by the resilient metal terminal.
(4) Cheap to manufacture. Since the PTC
thermistor may be of circular plate type which is easy to make and may be of small size, the heater can be manufactured cheaply.
Figs. 6 and 7 show another embodiment of the present invention. In Fig. 6 a cylindrical, hollow ceramic case 101 can be divided into two parts.
Housed in the ceramic case 101 are resilient terminal plates 103, cylindrical metallic radiators 104, circular PTC thermistors 105, and circular ceramic heaters 102, in this order, and the metallic radiator 104, the PTC thermistor 105, the metallic radiator 104, the ceramic heater 102 and the metallic radiator 104 are held by and between the terminal plates 103.
Lead wires 111, 112 are connected to the terminal plates 103, and the ceramic case 101 which houses the terminal plates 103, the metallic radiators 104, the PTC thermistors 105, the tubular insulator 107 and the ceramic heaters 102 is housed in a metal 1 tube 106 as shown in Fig. 6. A sealing material 113 is provided.
Fig. 7 shows an electrical circuit of the sealed thermostatic heater shown in Fig. 6 in which two sets of series combination of the PTC thermistor 105 and the ceramic heater 102 are connected in parallel. The series combination of the PTC thermistor 105 and the ceramic heater 102 may be one, or a plurality of such combinations may be connected in parallel. As shown in a resistance-temperature characteristic of Fig. 8, the ceramic heater 102 has a higher initial resistance than the PTC thermistor 105 so that upon power on the heat is generated primarily by the ceramic heater 102. When the PTC
thermistor 105 reaches a predetermined temperature the resistance thereof suddenly increases, attenuating the current to thereby maintain the temperature at a constant value. Further, in its construction, since the metallic radiators 104 are arranged in the ceramic case 101 such that they make contact with the electrode surfaces of the ceramic heaters 102 and the PTC
thermistors 105, the entire surface of the metal tube 106 may readily posses uniform temperature distribution, as shown in Fig. 9.
According to the sealed thermostatic heater of the present invention thus constructed, the following advantages are presented;
(1) Since the cylindrical metallic radiators are arranged to make contact with the electrodes of the circular ceramic heaters, the temperature rise rate of the metallic tube surface is very fast.
105(~093 1 Although the heating surface of the ceramic heater per se is very small, since the metallic radiators are in contact with the electrode surfaces, the heat of the ceramic heater is transmitted to a wide area in a short time period and the heating surface to the metallic tube is large resulting in the improvement of the temperature rise characteristic.
(2) Since the heat of the ceramic heater is directly received by the PTC thermistor through the metallic radiator, the heater operates stably at the correct temperature. Under the stabilized condition, the ceramic heater and the PTC thermistor generate the heat so that a wide heating surface may be provided through the rediator.
(3) In general, the heat generated by the ceramic heater and the PTC thermistor under the stabilized condition changes depending on the uneven-ness of the characteristics of the respective elements and such unevenness results in the unevenness of the surface temperature distribution (temperature at various points) of the metal tube. By sorting the characteristics of the elements and taking the balance of the positioning of the elements by changing the width of the metallic radiator, the temperature dis-tribution can be readily unified.(4) Since the shapes of the ceramic heater and the PTC thermistor are of conventional circular type they can be very readily manufactured in small size with low cost. Because of the metallic radiator the electrical connection is also easily made and the 1 assembly thereof is simple.
~5) Since the PTC thermistor is used in the sealed thermostatic heater of the present invention, the power dissipation and the heater temperature remain substantially unchanged even if the power supply voltage changes, as seen from the voltage characteristic curve of Fig. 10.
thermistor may be of circular plate type which is easy to make and may be of small size, the heater can be manufactured cheaply.
Figs. 6 and 7 show another embodiment of the present invention. In Fig. 6 a cylindrical, hollow ceramic case 101 can be divided into two parts.
Housed in the ceramic case 101 are resilient terminal plates 103, cylindrical metallic radiators 104, circular PTC thermistors 105, and circular ceramic heaters 102, in this order, and the metallic radiator 104, the PTC thermistor 105, the metallic radiator 104, the ceramic heater 102 and the metallic radiator 104 are held by and between the terminal plates 103.
Lead wires 111, 112 are connected to the terminal plates 103, and the ceramic case 101 which houses the terminal plates 103, the metallic radiators 104, the PTC thermistors 105, the tubular insulator 107 and the ceramic heaters 102 is housed in a metal 1 tube 106 as shown in Fig. 6. A sealing material 113 is provided.
Fig. 7 shows an electrical circuit of the sealed thermostatic heater shown in Fig. 6 in which two sets of series combination of the PTC thermistor 105 and the ceramic heater 102 are connected in parallel. The series combination of the PTC thermistor 105 and the ceramic heater 102 may be one, or a plurality of such combinations may be connected in parallel. As shown in a resistance-temperature characteristic of Fig. 8, the ceramic heater 102 has a higher initial resistance than the PTC thermistor 105 so that upon power on the heat is generated primarily by the ceramic heater 102. When the PTC
thermistor 105 reaches a predetermined temperature the resistance thereof suddenly increases, attenuating the current to thereby maintain the temperature at a constant value. Further, in its construction, since the metallic radiators 104 are arranged in the ceramic case 101 such that they make contact with the electrode surfaces of the ceramic heaters 102 and the PTC
thermistors 105, the entire surface of the metal tube 106 may readily posses uniform temperature distribution, as shown in Fig. 9.
According to the sealed thermostatic heater of the present invention thus constructed, the following advantages are presented;
(1) Since the cylindrical metallic radiators are arranged to make contact with the electrodes of the circular ceramic heaters, the temperature rise rate of the metallic tube surface is very fast.
105(~093 1 Although the heating surface of the ceramic heater per se is very small, since the metallic radiators are in contact with the electrode surfaces, the heat of the ceramic heater is transmitted to a wide area in a short time period and the heating surface to the metallic tube is large resulting in the improvement of the temperature rise characteristic.
(2) Since the heat of the ceramic heater is directly received by the PTC thermistor through the metallic radiator, the heater operates stably at the correct temperature. Under the stabilized condition, the ceramic heater and the PTC thermistor generate the heat so that a wide heating surface may be provided through the rediator.
(3) In general, the heat generated by the ceramic heater and the PTC thermistor under the stabilized condition changes depending on the uneven-ness of the characteristics of the respective elements and such unevenness results in the unevenness of the surface temperature distribution (temperature at various points) of the metal tube. By sorting the characteristics of the elements and taking the balance of the positioning of the elements by changing the width of the metallic radiator, the temperature dis-tribution can be readily unified.(4) Since the shapes of the ceramic heater and the PTC thermistor are of conventional circular type they can be very readily manufactured in small size with low cost. Because of the metallic radiator the electrical connection is also easily made and the 1 assembly thereof is simple.
~5) Since the PTC thermistor is used in the sealed thermostatic heater of the present invention, the power dissipation and the heater temperature remain substantially unchanged even if the power supply voltage changes, as seen from the voltage characteristic curve of Fig. 10.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A sealed thermostatic heater comprising a ceramic tube having at least one PTC thermistor and at least two metallic radiators housed therein, said PTC thermistor being held by and between said radiators, said ceramic tube being sealed in a metal tube, and a heater in said metal tube electrically connected in series with said PTC thermistor.
2. A sealed thermostatic heater according to claim 1 wherein the heater is arranged on the outer periphery of said ceramic tube.
3. A sealed thermostatic heater according to claim 2, wherein a terminal plate fitted to one end of said ceramic tube and said heater are electrically connected in series, one said radiator, said PTC thermistor and another said radiator are inserted in that order, into said ceramic tube, said radiators and said PTC thermistor are held by and between said terminal plate and a resilient metal terminal forcibly inserted into said ceramic tube, and said heater and said PTC thermistor being connected in series through said terminal plate.
4. A sealed thermostatic heater according to claim 1, wherein said heater is a disc type ceramic heater conductively held between a pair of said metallic radiators and said PTC
thermistor is of disc type and is conductively held between another pair of said metallic radiators.
thermistor is of disc type and is conductively held between another pair of said metallic radiators.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14108374U JPS5438610Y2 (en) | 1974-11-20 | 1974-11-20 | |
| JP962475U JPS5191342U (en) | 1975-01-20 | 1975-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050093A true CA1050093A (en) | 1979-03-06 |
Family
ID=26344386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA240,007A Expired CA1050093A (en) | 1974-11-20 | 1975-11-19 | Sealed thermostatic heater employing a heater and ptc thermistor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4045763A (en) |
| CA (1) | CA1050093A (en) |
| DE (1) | DE2551980B2 (en) |
| FR (1) | FR2292395A1 (en) |
| GB (1) | GB1502479A (en) |
| IT (1) | IT1052333B (en) |
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2816076A1 (en) * | 1978-04-13 | 1979-10-25 | Siemens Ag | HEATER WITH FERROELECTRIC CERAMIC HEATING ELEMENT |
| DE2840242C2 (en) * | 1978-09-15 | 1984-08-23 | Siemens AG, 1000 Berlin und 8000 München | Heating device for preheating heating oil |
| US4282003A (en) * | 1978-12-06 | 1981-08-04 | Texas Instruments Incorporated | Method for constructing a self-regulating electric heater |
| US4236065A (en) * | 1978-12-06 | 1980-11-25 | Texas Instruments Incorporated | Self-regulating electric heater |
| US4316080A (en) * | 1980-02-29 | 1982-02-16 | Theodore Wroblewski | Temperature control devices |
| US4458137A (en) * | 1981-04-09 | 1984-07-03 | Rosemount Inc. | Electric heater arrangement for fluid flow stream sensors |
| US4563571A (en) * | 1981-12-16 | 1986-01-07 | Matsushita Electric Industrial Company, Limited | Electric water heating device with decreased mineral scale deposition |
| US4659913A (en) * | 1982-04-16 | 1987-04-21 | Raychem Corporation | Elongate electrical assemblies |
| US4582983A (en) * | 1982-04-16 | 1986-04-15 | Raychem Corporation | Elongate electrical assemblies |
| US4791276A (en) * | 1982-04-16 | 1988-12-13 | Raychem Corporation | Elongate electrical assemblies |
| US4574188A (en) * | 1982-04-16 | 1986-03-04 | Raychem Corporation | Elongate electrical assemblies |
| DE3246775A1 (en) * | 1982-12-17 | 1984-07-12 | Robert 7990 Friedrichshafen Kolb jun. | Heating apparatus which can be heated electrically |
| GB8417547D0 (en) * | 1984-07-10 | 1984-08-15 | Dreamland Electrical Apliances | Electric blankets |
| DE3544589C2 (en) * | 1985-12-17 | 1994-01-13 | Wolf Woco & Co Franz J | Heated element of a windscreen washer system for motor vehicles |
| NL8600142A (en) * | 1986-01-23 | 1987-08-17 | Philips Nv | METHOD FOR MANUFACTURING A SELF-REGULATING HEATING ELEMENT |
| DE3617679A1 (en) * | 1986-05-26 | 1987-12-03 | Stego Elektrotechnik Gmbh | ELECTRIC RADIATOR |
| US4791272A (en) * | 1986-10-24 | 1988-12-13 | Windmere Corporation | PTC hair roller |
| DE3709285A1 (en) * | 1987-03-20 | 1988-09-29 | Tuerk & Hillinger Gmbh | Electrical heating cartridge having an intrinsically different power emission |
| US4794229A (en) * | 1987-04-24 | 1988-12-27 | Thermon Manufacturing Company | Flexible, elongated thermistor heating cable |
| DE3717574A1 (en) * | 1987-05-25 | 1988-12-15 | Ruthenberg Gmbh Waermetechnik | DEVICE FOR HEATING AREAS IN OR ON MOTOR VEHICLES, FOR EXAMPLE SEATS, WINDOWS, MIRRORS, OR THE LIKE |
| DE8717467U1 (en) * | 1987-09-09 | 1989-04-27 | Eltra Gmbh & Co Kg Leicht & Trambauer, 6102 Pfungstadt, De | |
| US4937435A (en) * | 1987-12-14 | 1990-06-26 | Thermon Manufacturing Company | Flexible electric heating pad using PTC ceramic thermistor chip heating elements |
| FR2690112B1 (en) * | 1992-04-21 | 1995-06-23 | Valeo Thermique Habitacle | DEVICE FOR HEATING-VENTILATION OF THE INTERIOR OF A MOTOR VEHICLE POWERED BY A LOW-THERMAL EMISSION ENGINE. |
| US5414241A (en) * | 1992-05-11 | 1995-05-09 | Sekisui Kaseihin Kogyo Kabushiki Kaisha | Heater, a method of manufacturing the same, and an anti-condensation mirror incorporating the same |
| US5354967A (en) * | 1992-11-13 | 1994-10-11 | Helen Of Troy Corporation | Hair styling appliance heater and control |
| JPH0773958A (en) * | 1993-09-03 | 1995-03-17 | Texas Instr Japan Ltd | Heating device |
| DE4444685A1 (en) * | 1994-12-15 | 1996-06-20 | Behr Thomson Dehnstoffregler | Thermostatic working element with an electrical resistance heating element |
| EP1988749B1 (en) * | 2001-12-06 | 2012-02-08 | Eberspächer catem GmbH & Co. KG | Electric heating device |
| US6945255B2 (en) * | 2003-01-16 | 2005-09-20 | Conair Corporation | Hair roller with a ceramic coating |
| DE10360169A1 (en) * | 2003-12-20 | 2005-07-28 | Gustav Wahler Gmbh U. Co. Kg | Heating device, in particular for a thermostatic working element of a thermostatic valve |
| US7034259B1 (en) | 2004-12-30 | 2006-04-25 | Tom Richards, Inc. | Self-regulating heater assembly and method of manufacturing same |
| CN102906387B (en) * | 2009-12-24 | 2016-01-20 | 英瑞杰汽车系统研究公司 | Be equipped with liquid storage tank and the tank of self-regulation heating element |
| CN101902846A (en) * | 2010-07-21 | 2010-12-01 | 张福民 | Nano-silicon conductive ceramic electrical heating tube element and manufacture method thereof |
| GB2477834B (en) | 2010-08-31 | 2012-02-01 | Jemella Ltd | Hair styling appliance |
| GB2500733B (en) * | 2012-06-25 | 2014-05-21 | Jemella Ltd | Hair styling appliance |
| US10542587B2 (en) * | 2015-12-08 | 2020-01-21 | Temp4 Inc. | Heating elements of large sizes and of metallic tubular designs |
| CN109449901A (en) * | 2018-12-05 | 2019-03-08 | 丹东国通电子元件有限公司 | Ceramic PTC therefore high pulse power load protector |
| US20210146755A1 (en) * | 2019-11-14 | 2021-05-20 | Lexmark International, Inc. | Cabin heater for vehicle |
| GB2613777A (en) * | 2021-12-03 | 2023-06-21 | Amphenol Thermometrics Inc | Heating unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1279321A (en) * | 1916-01-19 | 1918-09-17 | Seymour Stedman | Electrically-heated soldering-iron. |
| GB297503A (en) * | 1927-06-24 | 1928-09-24 | Walter Rosenhain | Improvements relating to electric heating devices for use in electric furnaces, domestic heating appliances and the like |
| US3023295A (en) * | 1958-07-30 | 1962-02-27 | Hexacon Electric Company | Electric soldering iron of the instant heat type |
| JPS4941732Y1 (en) * | 1968-11-29 | 1974-11-15 | ||
| US3586642A (en) * | 1968-05-29 | 1971-06-22 | Matsushita Electric Ind Co Ltd | Ptc thermistor of bati03,and other oxides |
| DE1922206C3 (en) * | 1969-04-30 | 1973-10-04 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Thermostat with ceramic PTC thermistors as self-regulating heating resistances for quartz oscillators |
| US3673538A (en) * | 1969-12-05 | 1972-06-27 | Texas Instruments Inc | Composite thermistor temperature sensor having step-function response |
| US3632971A (en) * | 1970-01-27 | 1972-01-04 | Texas Instruments Inc | Self-limiting electric hair curler heater |
-
1975
- 1975-11-18 GB GB47561/75A patent/GB1502479A/en not_active Expired
- 1975-11-18 FR FR7535159A patent/FR2292395A1/en active Granted
- 1975-11-19 IT IT7552298A patent/IT1052333B/en active
- 1975-11-19 DE DE2551980A patent/DE2551980B2/en not_active Withdrawn
- 1975-11-19 CA CA240,007A patent/CA1050093A/en not_active Expired
- 1975-11-19 US US05/633,230 patent/US4045763A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB1502479A (en) | 1978-03-01 |
| FR2292395B1 (en) | 1980-08-14 |
| US4045763A (en) | 1977-08-30 |
| DE2551980A1 (en) | 1976-05-26 |
| FR2292395A1 (en) | 1976-06-18 |
| IT1052333B (en) | 1981-06-20 |
| DE2551980B2 (en) | 1980-04-17 |
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