DE2307244A1 - COOLING COIL BATTERY WITH DRAIN BOX - Google Patents

Description

Patent attorneys

Dr. E. Boettner
Dipl.-Ing. IL-J. Müller

Dr. Th. Bcreudt

D 8 Munich 8α

Lueüe-Grahn-Str. 38, Tel. 47 51 55

As / P

Iiuftkonditionering AB, Ynglingagatan H, Box 23053, 10435 Stockholm (Sweden)

Cooling coil with drain box

The invention relates to a cooling coil battery with a drain box, especially for Air conditioners, with the drain box located in the area for the lower part of the battery and is intended to collect the condensate that forms during operation of the cooling coil.

At. with a drain box of this type there is a risk that the occasional very significant pressure difference, which in a closed system is always between the environment and the interior of the cooling

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snake prevails, leads to an air leak in the ■ drain box Jb between it. The box must therefore be designed in such a way that this air leakage does not exceed certain standard values.

Attempts have already been made by various means to limit air leakage. Among other things an airtight drainage box has been proposed which is equipped with an outlet with an associated siphon. However, this arrangement has the watchdog, that the condensate from the elbows and manifolds beyond the ends of the coil does not can be collected or this manifold and collecting or distribution pipes must be insulated. Since in As a rule, the cooling coil battery is out of operation for about two thirds of the year there is also a considerable risk that def Siphon, especially if it is of the conventional type, dries out and lets air through.

Another older proposal was a drain box Made in three parts and provided with projecting parts in such a way that the condensate from the Elbows and collecting or distribution pipes can be collected »However, this arrangement requires several outlets, each with a separate siphon, and this leads to a multiplication of the disadvantage mentioned above for a single siphon,

Also already known is a completely open construction of a cooling coil battery, both the bottom of the battery with slots or the like.

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is provided so that water can run out. The so however, the openings provided obviously lead to undesirable air leakage, and consequently this construction satisfies the applicable standard requirements in no way.

The invention is therefore based on the object of a construction that is simple from a manufacturing point of view To create a solution to the problem, 'which the disadvantages of the cooling clilangenbat teri en of the specified Genus eliminated.

According to the invention this is essentially achieved thereby achieved that a body made of essentially semi-permeable material is used in the discharge loads, that, in relation to the water formed in or flowing through the Ivühlschlangenbat- and amount of air has good water permeability and low air permeability.

Thanks to this measure, a cooling coil battery with a drain or drip box is created, which in addition to its primary puncture and beyond this ensures a satisfactory airtightness to the environment.

In practice it is preferred that the body be in the area for the corresponding outer end of the cooling coil.

Especially in those cases in which the drain box protrudes at least on one side beyond the cooling coil and is used to collect the con-

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densates of manifolds belonging to the battery, collecting and distribution pipes or the like. serves, it is preferable that the semi-permeable body in that Area for the corresponding outer end of the cooling coil is arranged.

In an embodiment preferred in practice, in which the drain box protrudes on both sides over the cooling coil, there is such a semi-permeable body at both ends of the cooling coil arranged, and also the two outer free parts of the Ablatifkastens typically protrude a suitably designed drainage channel in a conductive connection with one another.

The semi-permeable body, which is different from the two media involved, air and water Has permeability, typically consists of suitable open-cell plastic.

The outlet of the drain box is conveniently on the open side of the box, i.e. on the outside of the semi-permeable body, arranged. In this way there is no need for a siphon.

In the drawing, a preferred embodiment of the invention is shown as an example.

Fig. 1 is a partially cut-away perspective view of a cooling coil battery with a drain box according to the invention;

Fig. 2 is a front view of a cooling coil.

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battery according to Flg. 1; and

Fig. 3 is a section through the subject matter of Fig. 2. -

A cooling coil battery 1 arranged for direct expansion is part of an air conditioning unit provided with a drain box 2 with an outlet 3 and a drain pipe 5. The lower part the drain box is covered with a base plate 7 with slots 6, the dripping of the to Allow cooling fins formed condensate in the drain box.

The drain box 2 has at each of its ends a projecting, open part 2a, in which the of the Pipe elbows 1a and condensate dripping from the collecting or distribution pipes 1b of the cooling coil battery is collected. The two outer sections 2a are connected to one another via a drain pipe 5.

Within the drain at least 2, a substantially semi-permeable body k made of an open-cell material, for example a cellular plastic, is arranged at each individual end 'of the cooling coil battery 1. This body offers a very high resistance to the passage of air, while at the same time allowing the condensate that is formed to pass through. Therefore, the air leakage through the cooling coil battery is limited to a minimum, while at the same time all the condensate collected in the drain box can flow off through the outlet 3.

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Fig. 3 shows the arrangement and design of the substantially semi-permeable body k in a sectional side view.

FIG. 2 shows in addition to that illustrated in FIG. 1 Equipment some other control device 8 associated with the cooling coil battery.

Numerous modifications are possible within the framework of the basic concept of the invention. For example, the entire collecting box can consist of a base of this battery which is produced in one piece with the cooling coil battery. Instead of a cellular plastic can for sigen substantially halbdurchlä body ₃ a natural or synthetic schwammar- term material, such as foam, may be used. In certain cases the drain pipe 5 is superfluous.

With a cooling coil for air conditioning normal size usually flow 10 to 15x.

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10 m air per hour and per front surface. Under normal operating conditions are about 30 to 50 1 condensate (precipitated water) generated, which the drain body must let through. Preferably the semi-permeable body then has such a high resistance to the passage of fragrance that it only has less than 0.1 ^, i.e. in the above example approx. 1 to 1.5 m lets through every hour. In any case, the body should have at least 10 times more water than in air, expressed in weight units per unit of time , let through.

Claims

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Claims (3)

Pat e η t a η s ρ ν ü c Ji e 1.) Cooling coil battery with a drain box, in particular - \ J ^y others for air conditioning systems, the drain box arranged in the area of the lower part of the cooling coil and intended for collecting the condensate that forms during operation of the cooling coil, characterized by a body made of essentially semi-permeable material which is inserted into the drain box and which is in relation to the in The quantities of water and air formed in the cooling coil or flowing through it have good permeability for water and low permeability for air, 2. Cooling coil battery according to claim 1, characterized in that that the substantially semi-permeable body is arranged such that it has at least one 10 times as much water as air, expressed in weight units per unit of time, lets through " 3. Cooling coil battery according to claim 1 or 2, the drain box on at least one side over the cooling coil protrudes out and to collect the condensate from the pipe elbows, collecting and Distribution pipes or the like. the queue is suitably arranged, characterized in "that the substantially semi-permeable body in the area for the relevant outer end of the cooling coil is arranged. h, cooling coil battery according to claim 3 »whose drain box protrudes on both sides beyond the cooling coil, thereby 309836/0865 marked that each one. essentially semipermeable body is provided at each of the ends of the cooling coil and that the two outer free parts of the drain box are connected to one another via a drain pipe. Cooling coil battery according to one of Claims 1 to 4, characterized in that the essentially semi-permeable body from an open-cell Made of plastic. 3098 3 8/0885 Blank page