US20090185597A1 - Temperature sensor assembly - Google Patents
Temperature sensor assembly Download PDFInfo
- Publication number
- US20090185597A1 US20090185597A1 US12/015,707 US1570708A US2009185597A1 US 20090185597 A1 US20090185597 A1 US 20090185597A1 US 1570708 A US1570708 A US 1570708A US 2009185597 A1 US2009185597 A1 US 2009185597A1
- Authority
- US
- United States
- Prior art keywords
- axis
- sensor
- assembly
- duct
- ribs
- 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.)
- Granted
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
Definitions
- HVAC heating ventilation and air conditioning
- An electronic sensor installed in an air duct, produces a signal representing the temperature of air flowing in an air duct.
- the sensor includes a NTC thermistor and two leads coated with epoxy, housed in a plastic body.
- a conventional sensor assembly includes a plastic retainer having two ribs spaced about 1.5 mm. apart, which ribs engage the duct wall when the sensor assembly is inserted into the duct. A temperature probe portion of the assembly is inserted in the retainer and held in position on the duct wall. Terminals of the sensor assembly are then connected by a wiring harness to an electronic HVAC control module.
- the retainer's ribs cannot accommodate or compensate for variations in the thickness of the duct, if the duct wall thickness varies much from 1.5 mm. Additionally, the temperature sensor is sensitive to variations in the diameter of the hole formed in the duct wall where the sensor is located. Consequently a sensor, poorly fitted in the duct wall, can lose its retention on the duct wall, disengage and become lost at a vehicle assembly plant.
- An embodiment contemplates a sensor assembly for installation in a hole formed in a wall of a duct.
- the assembly includes a sensor, and a body containing the sensor and extending along an axis, the body including a shoulder, and series of elastically resilient ribs spaced mutually along the axis and inclined outward and toward the shoulder, the ribs deflecting flexurally into engagement with the wall as the assembly is inserted into the hole.
- the sensor is preferably a temperature sensor
- the duct is an air duct having a relatively thin wall thickness.
- An advantage of an embodiment is its one-piece design and tree type fastening scheme, which is highly tolerant of variations in duct thickness and hole size.
- the sensor probe is aligned with and inserted into a hole in the duct.
- the sensor probe is retained in the hole by elastic deformation of plastic serrations formed on the outer surface of the sensor.
- the sensor assembly is of a compact size and unitary construction that incorporates the sensor and retainer in a single part that is easily and speedily installed in an air duct. Retention of the sensor assembly in the thickness of the duct wall is exceptionally reliable.
- the assembly is engaged with the inner and outer surfaces of the duct wall with a tight fit that prevents inadvertent displacement of the assembly relative to the duct.
- the shape, size and elastically resilient character of the ribs facilitates insertion of the assembly in a hole through the duct wall. After installation, the ribs resist, but do not prevent removal, of the assembly from the duct.
- FIG. 1 is a side view of an electronic duct air temperature sensor assembly
- FIG. 2 is a cross sectional view of the sensor assembly of FIG. 1 ;
- FIG. 3 is a perspective view showing the sensor assembly installed in an air duct.
- FIG. 4 is a cross sectional view showing the sensor assembly installed in an air duct.
- FIGS. 1 and 2 illustrate an electronic duct air temperature sensor assembly 10 that includes a body 12 having a central axis 13 and formed with a series of ribs 14 spaced along the body, a cylindrical base 16 and a cage 18 containing an air temperature sensor 20 .
- the cage 18 includes open passages 22 that allow air in the duct to flow through the assembly 10 and across the sensor 20 .
- Electric conducting leads 24 extend from sensor 20 along the body 12 to terminals 26 , 28 , which are enclosed in a receptacle portion 30 of the body 12 , into which receptacle is inserted a plug secured to a wiring harness (not shown) for electrically engaging the terminals.
- the body 12 includes a cylindrical shoulder 32 , which is formed with an annular recess 34 .
- FIG. 2 shows that the ribs 14 extend radially outward and upward toward the shoulder 32 .
- the ribs 14 are relatively thin, flexible, elastically displaceable and resilient, i.e., they tend to return to the position shown in FIG. 2 after being deflected due to flexure upon installation in a duct.
- the body 12 including ribs 14 are formed of elastically resilient plastic.
- the size and shape of the cylindrical base 16 extend above the cage to a cylindrical portion 40 of the body 12 , on which the ribs are supported and from which the ribs extend radially outward and upward toward the shoulder 36 .
- FIGS. 3 and 4 show the sensor assembly 10 installed in the wall 42 of an air duct 44 .
- the duct preferably includes a mounting surface 46 , which is raised above the surface of the surrounding duct 44 and is formed with a hole 48 , whose size allows the base 16 , ribs 14 , and cylindrical portion 40 to enter, yet prevents the shoulder 36 from entering.
- a rubber gasket may seated on the mounting surface below the shoulder 32 .
- At least one rib extends into the annular recess 43 formed in shoulder 32 .
- rib 50 elastically flexes into contact with the outer surface of the mounting surface 46
- the next rib 52 located immediately below rib 50 flexes into contact with the inner surface of the mounting surface, as shown in FIG. 4 .
- the inclination of the ribs facilitates inserting the sensor assembly 10 into the hole 48 and resists removal of the assembly from the hole.
- the ribs elastically deflect in flexure as they enter the hole 48 . This flexural deflection permits the ribs to engage the inner and outer surfaces of mounting surface 46 around the entire periphery of the hole 48 . The engagement secures the assembly 10 to the wall 42 and resisting its removal.
- shoulder 32 seats on the mounting surface 46 or on a thin rubber gasket located on the mounting surface.
Abstract
Description
- The present invention relates generally to heating ventilation and air conditioning (HVAC) systems, and, more particularly to an air temperature sensor for an automatically controlled HVAC system.
- Automatic control of HVAC systems requires that the correct temperature of air flowing through the air ducts and outlets be determined. An electronic sensor, installed in an air duct, produces a signal representing the temperature of air flowing in an air duct. The sensor includes a NTC thermistor and two leads coated with epoxy, housed in a plastic body.
- It is conventional to form HVAC air ducts by a blow molding process that causes the thickness of the duct walls to vary from 0.70 mm. to 2.25 mm. A conventional sensor assembly includes a plastic retainer having two ribs spaced about 1.5 mm. apart, which ribs engage the duct wall when the sensor assembly is inserted into the duct. A temperature probe portion of the assembly is inserted in the retainer and held in position on the duct wall. Terminals of the sensor assembly are then connected by a wiring harness to an electronic HVAC control module.
- The retainer's ribs cannot accommodate or compensate for variations in the thickness of the duct, if the duct wall thickness varies much from 1.5 mm. Additionally, the temperature sensor is sensitive to variations in the diameter of the hole formed in the duct wall where the sensor is located. Consequently a sensor, poorly fitted in the duct wall, can lose its retention on the duct wall, disengage and become lost at a vehicle assembly plant.
- An embodiment contemplates a sensor assembly for installation in a hole formed in a wall of a duct. The assembly includes a sensor, and a body containing the sensor and extending along an axis, the body including a shoulder, and series of elastically resilient ribs spaced mutually along the axis and inclined outward and toward the shoulder, the ribs deflecting flexurally into engagement with the wall as the assembly is inserted into the hole. The sensor is preferably a temperature sensor, and the duct is an air duct having a relatively thin wall thickness.
- An advantage of an embodiment is its one-piece design and tree type fastening scheme, which is highly tolerant of variations in duct thickness and hole size. The sensor probe is aligned with and inserted into a hole in the duct. The sensor probe is retained in the hole by elastic deformation of plastic serrations formed on the outer surface of the sensor.
- The sensor assembly is of a compact size and unitary construction that incorporates the sensor and retainer in a single part that is easily and speedily installed in an air duct. Retention of the sensor assembly in the thickness of the duct wall is exceptionally reliable. The assembly is engaged with the inner and outer surfaces of the duct wall with a tight fit that prevents inadvertent displacement of the assembly relative to the duct.
- The shape, size and elastically resilient character of the ribs facilitates insertion of the assembly in a hole through the duct wall. After installation, the ribs resist, but do not prevent removal, of the assembly from the duct.
-
FIG. 1 is a side view of an electronic duct air temperature sensor assembly; -
FIG. 2 is a cross sectional view of the sensor assembly ofFIG. 1 ; -
FIG. 3 is a perspective view showing the sensor assembly installed in an air duct; and -
FIG. 4 is a cross sectional view showing the sensor assembly installed in an air duct. -
FIGS. 1 and 2 illustrate an electronic duct airtemperature sensor assembly 10 that includes abody 12 having acentral axis 13 and formed with a series ofribs 14 spaced along the body, acylindrical base 16 and acage 18 containing anair temperature sensor 20. Thecage 18 includesopen passages 22 that allow air in the duct to flow through theassembly 10 and across thesensor 20. - Electric conducting leads 24 extend from
sensor 20 along thebody 12 toterminals receptacle portion 30 of thebody 12, into which receptacle is inserted a plug secured to a wiring harness (not shown) for electrically engaging the terminals. Thebody 12 includes acylindrical shoulder 32, which is formed with anannular recess 34. -
FIG. 2 shows that theribs 14 extend radially outward and upward toward theshoulder 32. Theribs 14 are relatively thin, flexible, elastically displaceable and resilient, i.e., they tend to return to the position shown inFIG. 2 after being deflected due to flexure upon installation in a duct. Preferably thebody 12 includingribs 14 are formed of elastically resilient plastic. - The size and shape of the
cylindrical base 16 extend above the cage to acylindrical portion 40 of thebody 12, on which the ribs are supported and from which the ribs extend radially outward and upward toward theshoulder 36. -
FIGS. 3 and 4 show thesensor assembly 10 installed in thewall 42 of anair duct 44. AsFIG. 4 illustrates, the duct preferably includes amounting surface 46, which is raised above the surface of the surroundingduct 44 and is formed with ahole 48, whose size allows thebase 16,ribs 14, andcylindrical portion 40 to enter, yet prevents theshoulder 36 from entering. - Before the
sensor assembly 10 is inserted into thehole 48, a rubber gasket may seated on the mounting surface below theshoulder 32. - As
FIG. 2 illustrates, at least one rib, preferably theuppermost rib 50, extends into the annular recess 43 formed inshoulder 32. When theassembly 10 is inserted into thehole 48 and the assembly is installed in theduct wall 42, rib 50 elastically flexes into contact with the outer surface of themounting surface 46, and thenext rib 52 located immediately belowrib 50 flexes into contact with the inner surface of the mounting surface, as shown inFIG. 4 . - The inclination of the ribs facilitates inserting the
sensor assembly 10 into thehole 48 and resists removal of the assembly from the hole. The ribs elastically deflect in flexure as they enter thehole 48. This flexural deflection permits the ribs to engage the inner and outer surfaces ofmounting surface 46 around the entire periphery of thehole 48. The engagement secures theassembly 10 to thewall 42 and resisting its removal. When the assembly 100 is properly installed,shoulder 32 seats on themounting surface 46 or on a thin rubber gasket located on the mounting surface. - While certain embodiments of the present invention have been described in detail, those familiar with the art to which this invention relates will recognize various alternative designs and embodiments for practicing the invention as defined by the following claims.
Claims (16)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/015,707 US7553079B1 (en) | 2008-01-17 | 2008-01-17 | Temperature sensor assembly |
DE102009004530.9A DE102009004530B4 (en) | 2008-01-17 | 2009-01-14 | Sensor assembly for installation in a hole in a wall of a duct |
CN2009100025756A CN101487743B (en) | 2008-01-17 | 2009-01-16 | Temperature sensor assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/015,707 US7553079B1 (en) | 2008-01-17 | 2008-01-17 | Temperature sensor assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
US7553079B1 US7553079B1 (en) | 2009-06-30 |
US20090185597A1 true US20090185597A1 (en) | 2009-07-23 |
Family
ID=40793470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/015,707 Expired - Fee Related US7553079B1 (en) | 2008-01-17 | 2008-01-17 | Temperature sensor assembly |
Country Status (3)
Country | Link |
---|---|
US (1) | US7553079B1 (en) |
CN (1) | CN101487743B (en) |
DE (1) | DE102009004530B4 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100136392A1 (en) * | 2009-10-01 | 2010-06-03 | Delphi Technologies, Inc. | Cell temperature sensing apparatus for a batttery module |
US20140010266A1 (en) * | 2011-01-28 | 2014-01-09 | Nifco Inc. | Clip for attaching battery temperature sensor |
JP2014092537A (en) * | 2012-11-07 | 2014-05-19 | Tokai Rika Co Ltd | Sensor device |
US9423417B2 (en) | 2011-10-12 | 2016-08-23 | Fluke Corporation | Voltage tester having alternatively attachable or separable probes |
DE102015226113A1 (en) * | 2015-12-18 | 2017-06-22 | Robert Bosch Gmbh | Sensor device and sensor system |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006021528B3 (en) * | 2006-02-15 | 2007-09-13 | Epcos Ag | sensor |
US8734012B2 (en) * | 2009-08-21 | 2014-05-27 | Therm-O-Disc, Incorporated | Temperature sensor |
DE102009060639A1 (en) * | 2009-09-30 | 2011-04-07 | Sms Siemag Ag | Sensor element for measuring a temperature gradient and component of a metallurgical plant with such a sensor element |
DE102009058761A1 (en) * | 2009-12-14 | 2011-06-16 | Tmc Sensortechnik Gmbh | temperature sensor |
US8347698B2 (en) * | 2010-10-21 | 2013-01-08 | General Electric Company | Sensor with G-load absorbing shoulder |
DE102014005817A1 (en) | 2014-04-24 | 2015-10-29 | Voss Automotive Gmbh | Multi-part heatable media line, line connection device for such and method for producing such |
DE102017211856A1 (en) * | 2017-07-11 | 2019-01-17 | Mahle International Gmbh | Temperature measuring device |
CN107515053B (en) * | 2017-09-20 | 2019-05-21 | 湖北三江航天红阳机电有限公司 | A kind of pneumatic heat detecting device and its manufacturing method |
DE102018107130A1 (en) | 2018-03-26 | 2019-09-26 | Endress+Hauser Conducta Gmbh+Co. Kg | Sensor of process automation technology |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5733044A (en) * | 1995-09-20 | 1998-03-31 | Robert Bosch Gmbh | Temperature sensor |
US7056013B2 (en) * | 2003-10-28 | 2006-06-06 | Honeywell International Inc. | Sensor arrangement having an air inflow pattern for preventing direct debris impact |
US7237948B2 (en) * | 2004-02-10 | 2007-07-03 | Denso Corporation | Thermal sensor and thermal sensor housing mechanism |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2134644Y (en) * | 1992-06-03 | 1993-05-26 | 卜玉梁 | Packing of temp.-moisture sensor used in storehouse and its sender |
US5404760A (en) * | 1993-10-27 | 1995-04-11 | Westinghouse Electric Corporation | Blade path thermocouple and exhaust gas extraction probe for combustion turbines |
DE4403641C2 (en) * | 1994-02-05 | 1997-04-24 | Opel Adam Ag | Covering the steering window on vehicle bodies |
DE102006023438A1 (en) * | 2006-05-18 | 2007-11-22 | Epcos Ag | Detachable sensor |
-
2008
- 2008-01-17 US US12/015,707 patent/US7553079B1/en not_active Expired - Fee Related
-
2009
- 2009-01-14 DE DE102009004530.9A patent/DE102009004530B4/en not_active Expired - Fee Related
- 2009-01-16 CN CN2009100025756A patent/CN101487743B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5733044A (en) * | 1995-09-20 | 1998-03-31 | Robert Bosch Gmbh | Temperature sensor |
US7056013B2 (en) * | 2003-10-28 | 2006-06-06 | Honeywell International Inc. | Sensor arrangement having an air inflow pattern for preventing direct debris impact |
US7237948B2 (en) * | 2004-02-10 | 2007-07-03 | Denso Corporation | Thermal sensor and thermal sensor housing mechanism |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100136392A1 (en) * | 2009-10-01 | 2010-06-03 | Delphi Technologies, Inc. | Cell temperature sensing apparatus for a batttery module |
US8287185B2 (en) * | 2009-10-01 | 2012-10-16 | Delphi Technologies, Inc. | Cell temperature sensing apparatus for a battery module |
US20140010266A1 (en) * | 2011-01-28 | 2014-01-09 | Nifco Inc. | Clip for attaching battery temperature sensor |
US9261413B2 (en) * | 2011-01-28 | 2016-02-16 | Nifco Inc. | Clip for attaching battery temperature sensor |
US9423417B2 (en) | 2011-10-12 | 2016-08-23 | Fluke Corporation | Voltage tester having alternatively attachable or separable probes |
JP2014092537A (en) * | 2012-11-07 | 2014-05-19 | Tokai Rika Co Ltd | Sensor device |
DE102015226113A1 (en) * | 2015-12-18 | 2017-06-22 | Robert Bosch Gmbh | Sensor device and sensor system |
Also Published As
Publication number | Publication date |
---|---|
US7553079B1 (en) | 2009-06-30 |
CN101487743B (en) | 2011-04-13 |
DE102009004530A1 (en) | 2009-10-29 |
CN101487743A (en) | 2009-07-22 |
DE102009004530B4 (en) | 2019-11-07 |
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