JPS62967Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air conditioner mainly used for vehicles, such as a cooler unit using a corrugated fin type evaporator.

[Conventional technology]

Generally, cooler units that use a corrugated fin type evaporator have a case made of a resin molded product molded to match the shape of the evaporator, and an insulator made of a resin foam vacuum molded product is used between the case and the evaporator for insulation. . This insulator is formed to match the shape of the side surface of the case and the side surface of the evaporator, and is designed so that no gap is created between the evaporator and the insulator (or the case) when assembled.

[Problem that the invention attempts to solve]

However, since the case side inevitably requires a draft angle of the mold, and the lateral dimensions of the evaporator tend to vary during evaporator manufacturing, gaps tend to form on the evaporator side. . This gap sends the air from the blower into the interior of the vehicle without passing through the evaporator, resulting in a problem of lowering the heat exchange efficiency of the evaporator. Therefore,
Conventionally, in order to eliminate this gap, a separate compressible sealing material was attached to the fins on the side of the evaporator to prevent bypass air from occurring.
In other words, in a cooler unit having such an evaporator, insulator, and case as its constituent members, it is necessary to provide a special sealing material to prevent bypass air from the evaporator, which poses the problem of increased costs. .

The present invention was devised in view of this point, and an object of the present invention is to provide an air conditioner that can effectively prevent bypass winds without using a special sealing material.

[Means for solving problems]

Therefore, in the present invention, sealing material is not used to fill the gap on the side of the heat exchanger such as the evaporator.
By bending and protruding a part of the insulator, which has traditionally been used for heat insulation, from the side of the case by a certain width a at a height of dimension H, and compressing this protruding part with the side of the heat exchanger, Even when the draft angle of the case and variations in the dimensions of the heat exchanger increase the gap c between the heat exchanger and the insulator (case), some of the air from the blower passes through the side of the heat exchanger. This can be effectively prevented.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

In Fig. 1, 1 is a case molded from a resin material such as polypropylene, and this case 1 has a shape that follows the outer shape of the evaporator 3 so that it can be well stored and held as a heat exchanger for air conditioning, and has a top and bottom shape. It is molded into a two-part shape. This evaporator 3 has a meandering flat tube 5.
and a corrugated fin 4 thermally coupled to the tube 5 by brazing. and,
Liquid refrigerant liquefied in a condenser (not shown) of the refrigeration cycle is supplied from an inlet pipe 8 to an expander (for example, a temperature-operated expansion valve) 9, and after being depressurized and expanded in the expander 9, is introduced into the evaporator 3. The gas refrigerant evaporated by passing through the evaporator 3 is led out from the outlet pipe 7 to a compressor (not shown) of the refrigeration cycle.

Case 1 forms a ventilation path as shown in Figure 2, and a blower (not shown) is connected to the upstream side.
When the air sent from the evaporator 3 passes through the evaporator 3, it is cooled by the latent heat of evaporation of the refrigerant and becomes cold air.
Thereafter, the air is blown out into the passenger compartment from an air outlet (not shown) via a well-known heater unit connected downstream.

On the inner surface of the case 1, there is an insulator 2 made of foamed resin over the entire surface in order to increase the heat insulation properties of the case 1.
is glued. In particular, in the present invention, the part of the insulator 2 facing the side surface of the evaporator 3 is kept as thick as it is and has a predetermined width a (third width).
The protruding portion 2a is formed by bending the protruding portion 2a so as to protrude toward the evaporator 3 by an amount (see figure). Note that the width a of this protrusion 2a is smaller than the full width b of the evaporator 3, and the protrusion height H of the protrusion 2a is larger than the maximum gap c between the insulator 2 and the side surface of the evaporator 3. ing.

Therefore, when the evaporator 3 is housed in the case 1, the protrusion 2a is compressed by a predetermined amount H' as shown in FIG. In addition, the protrusion 2
As shown in FIG. 4, a is formed on the side surface of the evaporator 3 over the entire area in the vertical direction. Therefore, it is possible to reliably prevent the bypass wind from passing through the gap between the sides of the evaporator 3.

Although the evaporator 3 has been described in the above embodiment, it goes without saying that the present invention can be similarly applied to storing and holding other heat exchangers such as heater cores.

[Effect of idea]

As described above, according to the present invention, the protrusion 2a integrated with the insulator 2 can reliably prevent bypass air from passing through the gap formed on the side surface of the air conditioning heat exchanger such as the evaporator 3.

Therefore, this invention can satisfactorily resolve the problem of reduced heat exchange efficiency due to bypass wind, and eliminates the need to additionally install special sealing material to prevent the bypass wind, making manufacturing easier. It has the excellent effect of reducing costs and reducing costs.

Furthermore, in the present invention, since the protruding part 2a is formed by bending a part of the insulator 2 with the same thickness so as to protrude toward the heat exchanger side, the insulator 2 can be formed by vacuum forming a simple flat insulator material. It can be integrally molded into an insulator with a protruding part very easily, and since the protruding part 2a has the shape described above, it can be molded by blow molding in addition to vacuum forming.
It can also be molded by a molding method such as injection molding, and the molding method can be selected according to the product form, which is extremely useful in practice.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the device of the present invention, showing the cross-sectional shape taken along the line CC in FIG. Figure 2 is a sectional view taken along the line A-A in Figure 1, and Figure 3 is a cross-sectional view taken along the line A-A in Figure 1.
FIG. 4 is an enlarged sectional view of part B in the figure, and FIG. 4 is a side view of FIG. 1. 1...Case, 2...Insulator, 2a...
...Protrusion, 3... Evaporator forming a heat exchanger.

Claims (1)

[Claims for Utility Model Registration] A case comprising a case forming an air passage, a heat exchanger disposed within the case, and an insulator closely arranged on the inner surface of the case, the side surface of the heat exchanger of the insulator A part of the insulator is bent so as to protrude toward the heat exchanger side with the same thickness at a portion facing the side surface of the insulator to form a protrusion, and the protrusion height of the protrusion is set between the side surface of the heat exchanger and the insulator. Air conditioning equipment that is larger than the gap between.