JPH06135220A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To prevent water condensed by an evaporator from leaking to the outside from the joining surfaces of air conditioner outer cases in the case of an air conditioner for a vehicle. CONSTITUTION:An evaporator and a heater core are placed inside the upper case 1 and the lower case 2. A seal material 30 such as a packing is fixed beforehand at the case inner wall 2a of the lower case 2. At the time of case assembly, the fitting position of the upper case 1 and the lower case 2 is decided by putting the recessed groove 102 of the upper case 1 on the projecting portion 202 of the lower case 2. At this time, when the fitting of the upper case 1 to the lower case 2 is finished, the seal member 30 is accurately pinch-held elastically by means of adequate pressing force between the projecting porting 103 of the upper case 1 and the case inner wall 2a of the lower case 2. As a result, the leak of water condensed by the evaporator to the case outside is surely prevented by means of the seal material 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, which prevents water condensed in an evaporator from leaking from a mating surface of an outer case of the air conditioner.

[0002]

2. Description of the Related Art As an air conditioner in which a cooling unit and a heating unit are integrated with each other, there is a publication No. 34-
As shown in FIG. 12, it is known that a weir is formed inside the case so that part of the water condensed in the evaporator does not leak to the outside from the mating surface of the upper case and the lower case due to wind pressure.

[0003]

As another type of vehicle air conditioning system having a cooling unit and a heating unit built therein, there is an air conditioning unit as shown in FIG. 3, for example, which includes an upper case 1 and a lower case. An evaporator 7 that constitutes a refrigeration cycle is provided in the center of the inside of the case 2, and a heater core 9 that uses engine cooling hot water is provided downstream of the evaporator 7.

However, in this type of air conditioning unit case, the fitting portion between the upper case 1 and the lower case 2 must be provided at the lower position because of the structure. That is, a condensed water receiving portion 22 having an inclined surface is formed below the evaporator 7, a drain discharge port 10 is formed at a bottom portion connected to the condensed water receiving portion 22, and a drain discharge port 10 is provided in the vicinity of the drain discharge port 10. As shown by the broken line A, a part of the fitting portion 24 of the upper case 1 and the lower case 2 extends.

Therefore, since the fitting portion of the upper case 1 and the lower case 2 is located near the drain discharge port 10, the condensed water condensed in the evaporator 7 leaks from the case fitting portion to the outside of the case. There is a problem that it is easy to get out. The present invention has been made to solve such a problem, and provides a vehicle air conditioner that prevents water condensed in an evaporator from leaking outside from a mating surface of an air conditioner outer case. The purpose is to

[0006]

A vehicle air conditioner according to the present invention is a vehicle air conditioner in which an evaporator and a heater core can be built inside a case by fitting a plurality of cases. An uneven portion formed on the flange portion,
A convex / concave portion formed on the flange portion of the other case and capable of being fitted into the concave / convex portion; a convex portion formed on at least one of the concave / convex portion and the convex / concave case; It is characterized in that it is provided with a case inner wall on the side opposite to the case where the protrusion is formed and a seal member elastically held by the protrusion.

[0007]

According to the vehicle air conditioner of the present invention, the fitting positions of the cases are determined by the fitting of the concave and convex portions and the convex and concave portions, and by this positioning, the projection portion of one case and the inner wall of the other case are formed. The sealing material is accurately elastically sandwiched between them. For this reason, the water condensed in the evaporator built in the case is reliably prevented from leaking to the outside of the case by the sealing material.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. A first embodiment of the present invention is shown in FIGS. 1, 2 and 3. As shown in FIG. 3, the vehicle air conditioner of the present embodiment is provided with an evaporator 7 constituting a refrigeration cycle at the center of the inside of the upper case 1 and the lower case 2, and the engine cooling hot water is provided downstream thereof. The used heater core 9 is provided. The downstream side of the evaporator 7 is branched into an air passage 12 that bypasses the heater core 9 and a heater passage 14 that passes through the heater core 9. A damper 16 for adjusting the ratio of the amount of air passing through the heater core 9 to the amount of air not passing through the air passage 12,
18 is provided, and a damper 20 for adjusting the flow rate of the heater passage 14 is provided downstream of the heater passage 14. A condensed water receiving portion 22 having an inclined surface is formed below the evaporator 7 of the lower case 2, and a drain discharge port 10 is formed at a bottom portion connected to the condensed water receiving portion 22. A part of the fitting portion 24 of the upper case 1 and the lower case 2 extends in the vicinity of the drain discharge port 10 as shown in the area indicated by the broken line A.

A fitting portion 2 between the upper case 1 and the lower case 2
The structure of the mating surface of No. 4 is as shown in FIGS. FIG. 1 shows a state before case fitting, and FIG. 2 shows a state after case fitting. Flange part 1 of upper case 1
The bottom surface 104 of No. 01 is formed with the concave groove 102, and the bottom surface 1
A protruding portion 103 protruding downward is formed inside the case 04. The lower case 2 has a convex portion 202 formed on the upper surface of the flange portion 201 that can be fitted into the concave groove 102. Then, a sealing material 30 having a rectangular cross section made of packing, foamed rubber or the like is adhered and fixed to the inner wall 2a of the case inside the flange portion 201 by an adhesive.

When the upper case 1 and the lower case 2 are fitted together, as shown in FIG. 1, the fitting portion 24 of the upper case 1 and the lower case 2 is positioned by fitting the concave groove 102 and the convex portion 202. . By the positioning of the fitting portion 24 of the upper case 1 and the lower case 2, the projection 103 is pressed against the core of the sealing material 30 with an appropriate elastic force (pressing force). Thereby, the sealing material 30 between the protrusion 103 and the case inner wall 2a
Condensed water is prevented from leaking from the surrounding area to the outside of the case.

A space 40 is formed between the inner side of the flange 201 of the lower case 2 and the protrusion 103 of the upper case 1 to form an air heat insulating layer. The space 40 contacts the sealing material 30 and is formed airtight on the outside of the case of the sealing material 30. This improves the heat insulating effect of keeping the temperature inside the case from the outside of the case, so that the evaporator 7
By efficiently using the cooling capacity of the heater core 9 and the heating capacity of the heater core 9, energy consumption can be minimized and the desired blowout temperature can be properly secured by adjusting the opening degree of the dampers 16, 18, 20 and the like.

According to this embodiment, the fitting groove 24 of the upper case 1 and the convex portion 202 of the lower case 2 are fitted to each other so that the fitting portions 24 of the upper case 1 and the lower case 2 are accurately positioned. Therefore, since the protrusion 103 is pressed to an appropriate position of the seal material 30 fixed to the case inner wall 2a, the sealability is improved by the close contact between the seal material 30 and the protrusion 103. Further, since the air layer 40 as an air heat insulating layer is formed outside the case of the sealing material 30, the heat insulating effect inside the case is improved. Therefore, the air temperature adjustment by the evaporator 7 and the heater core 9 should be precisely controlled. There is an effect that can be. Further, since the air layer 40 is formed between the seal portion and the outside of the case, the heat insulation is improved,
This case fitting portion does not need a heat insulator, and has the effect of improving heat insulation with a simple structure.
Furthermore, at the time of assembling, conventionally, an assembling work step of inserting the seal material into the case groove before fitting the case was necessary, but in the present embodiment, the seal material is inserted into such a case groove. No need for complicated and complicated work processes,
There is an effect that the assemblability of the upper case 1 and the lower case 2 is improved and the reliability of the seal is improved. Although the sealing material 30 is adhesively fixed to the inner wall 2 a of the case, the protrusion 103
It may be fixed by adhesion.

Next, a second embodiment of the present invention is shown in FIG. The second embodiment shown in FIG. 4 is the sealing material 30 of the first embodiment.
Instead of this, a sealing material 300 having a U-shaped cross section is used. A notch-shaped groove 301 is formed in the sealing material 300 in advance. Therefore, when the upper case 1 and the lower case 2 are fitted to each other, the fitting portion 24 of the upper case 1 and the lower case 2 is positioned by fitting the concave groove 102 and the convex portion 202. Since the projection 103 is elastically fitted in the groove 301 without any positional deviation, the groove 3
The protrusion 103 can be easily incorporated in the 01. Since the space portion 40 forming an air layer is formed between the sealing material 300 and the upper case 1 and the lower case 2, good heat insulation is secured as in the above-mentioned embodiment. The U-shaped seal material 300 may be simply fitted into the protrusion 103, or a plate-like member may be bent along the surface of the protrusion 103 and fixed by adhesion.

A third embodiment of the present invention is shown in FIG. The third embodiment shown in FIG. 5 is an example in which a protrusion 206 on the lower case side is formed and a sealing material 304 is attached to the upper case 1 side. A recess 105 is formed inside the flange 101 of the upper case 1, and a protrusion 106 that protrudes downward is formed inside the recess 105. A sealing material 304 is adhered to the recess 105 with an adhesive. A concave groove 204 is formed inside the flange 201 of the lower case 2, and a protrusion 206 that protrudes upward is formed inside thereof.

When the upper case 1 and the lower case 2 are fitted to each other, the protruding portion 206 of the lower case 2 is fitted into the recessed groove 306 formed in the seal member 304 in a cut shape. As a result, the sealing material 304 and the protrusion 206 are fitted tightly to each other, and the space portion 40 forming the air heat insulating layer is formed in the concave groove portion 204, so that good heat insulation is obtained. Also, the groove 1
Since 02 and the convex portion 202 are fitted and fixed, the upper case 1 and the lower case 2 are accurately positioned, and the reliability of the sealing property and the heat insulating property is improved. The sealing material 304 may be fitted into the protrusion 206,
It may be formed in a plate shape and fixed by adhesion to the protrusion 206.

Next, a fourth embodiment of the present invention is shown in FIG. The fourth embodiment shown in FIG. 6 is an example in which a seal material 310 having a circular cross section is used instead of the seal material 30 of the first embodiment shown in FIG. The sealing material 310 is an annular one,
The circular cross section has the effect of further improving the assembling property. The sealing material 310 is fitted into the outer peripheral wall of the protrusion 103 of the upper case 1 by utilizing the elastic force of the sealing material. A space portion 312 that forms an air layer is formed above the sealing material 310. As a result, both the sealing property and the heat insulating property are improved, and the assembling property is also improved.

In the first, second and third embodiments described above, the sealing materials 30, 300 and 304 are fitted in the lower case 2 or the upper case 1. On the other hand, in the fourth embodiment shown in FIG. 6, the ring-shaped sealing material 310 is sealed around the entire circumference of the case fitting portion, so that the water leakage prevention effect is high when the possibility of water leakage is high. It becomes even more certain.

[0018]

As described above, according to the vehicular air conditioner of the present invention, the protrusions of one case and the inner wall of the other case are sealed by fitting and positioning the concave and convex portions of the case. Since the material performs the sealing function accurately, and also the fitting part between the uneven portion and the convex / concave portion performs the sealing function, it is possible to reliably prevent the water condensed in the evaporator from leaking from the mating surface of the air conditioner outer case. The effect is that you can do it.

According to the vehicle air conditioner of the present invention,
Since it is easy to attach the seal material to one of the cases before the case is fitted, there is an effect that the seal material adheres to the case when the case is fitted and the case fitting work is simplified.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a partial perspective view showing an upper case and a lower case before fitting according to the first embodiment of the present invention.

FIG. 3 is a schematic configuration diagram showing an air conditioner to which the first embodiment of the present invention is applied.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

FIG. 6 is a sectional view showing a fourth embodiment of the present invention.

[Explanation of reference numerals] 1 upper case 2 lower case 2a case inner wall 24 fitting portion 30 sealing material 40 space portion (air heat insulating layer) 101 flange portion 102 concave groove (uneven portion) 103 protrusion 201 flange portion 202 convex portion (concave / concave) Part) 300 sealing material 304 sealing material 310 sealing material 312 space (air insulation layer)

Claims (1)

[Claims] 1. A vehicle air conditioner capable of incorporating an evaporator and a heater core inside a case by fitting a plurality of cases, wherein a concavo-convex portion formed on a flange portion of one case and another case. Formed on the flange portion of the convex and concave portions that can be fitted to the concave and convex portion, and formed inside the case of the concave and convex portion and the convex and concave portions,
A vehicle characterized by comprising a protrusion formed on at least one of the cases, a case inner wall on the opposite side of the case on which the protrusion is formed, and a seal member elastically held by the protrusion. Air conditioner.