JPH1016544A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent disconnection of an insulation from a through hole and its slipping in to the inside of a coller case by forming a seal wall on a refrigerant piping through part of the cooler case, providing a through hole on this seal wall and holding a refrigerant piping by the through hole through the insulation. SOLUTION: Doubly structured seal walls 24, 25 are formed on a refrigerant piping through part of a cooler case, and through holes 26, 27 are provided on each of the seal walls 24, 25. Thereafter, an insulation 23 is installed by straddling on both of the through holes 26, 27 in a properly compressed state. At this time, an interval of both of the seal walls 24, 25 is set, for example, about 5-8 times of thickness of the seal wall 24. Additionally, the insulation 23 is molded of a foaming resin material, etc., and its outside dimension is made enough to secure proper compression quantity along the overall periphery against dimension of the through holes 26, 27. Thereafter, refrigerant pipings 20, 21 connected to an evaporator are held and fixed by the seal walls 24, 25 of the cooler case through the insulation 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art FIG. 3 is a longitudinal sectional view of a conventional vehicle air conditioner. In the figure, 2 is a fan case, 3 is a cooler case, 4 is a heater case, 13 is a band connecting the fan case 2 and the cooler case 3, and 14 is a cooler case 3.
And a band connecting the heater case 4 and the heater case 4. The casing 1 is constituted by the above-mentioned components and an outlet duct (not shown) connected to the heater case 4, and an air flow path is formed inside. Reference numeral 5 denotes a blower fan provided in the fan case 2 and is directly connected to and driven by an electric motor (not shown). Reference numeral 41 denotes an inside air suction port provided in the fan case 2, reference numeral 42 denotes an outside air suction port, and reference numeral 9 denotes an inside / outside air switching damper. By rotating this damper, one of the suction ports is opened to open the vehicle interior air. Alternatively, either air outside the vehicle is introduced. The arrow in the figure is the direction of air flow.

[0003] Reference numeral 6 denotes an evaporator provided in the cooler case 3 on the downstream side of the blower fan 5, reference numeral 20 denotes a refrigerant liquid pipe, and reference numeral 21 denotes a refrigerant low-pressure pipe. The evaporator 6 is provided with a refrigerant inlet and a refrigerant outlet. The refrigerant inlet is connected to an expansion valve via the refrigerant liquid pipe 20, and the refrigerant outlet is connected to a compressor via the refrigerant low-pressure pipe 21. The attachment of the refrigerant pipe to the cooler case will be described later.

[0004] Reference numeral 7 denotes a heater provided in the heater case 4 on the downstream side of the evaporator 6, and reference numeral 8 denotes an air mix damper provided close to the upstream side of the heater.
Although not shown, the heater 7 is provided with a hot water inlet and a hot water outlet, and these are connected to a cooling water circuit of a vehicle engine through a hot water pipe to form a circulation circuit. The air mix damper 8 pivots between a position where the air flow into the heater 7 is blocked and a position where the front surface of the heater 7 is opened,
The heating of the air by the heater can be adjusted. 43
Denotes an outlet passage connected to an air outlet (not shown).

When the air conditioner for a vehicle having the above configuration is operated, the blower fan 5 is driven, and the air inside the vehicle or the air outside the vehicle is introduced from the suction port and is sent into the air flow path of the casing 1 under pressure. The air is deodorized and deodorized by the air filter 5, enters the evaporator 6, is cooled by exchanging heat with the refrigerant flowing through the tube while passing through the gap between the fins, and is sent out to the air flow path on the upstream side of the heater 7. . The cooled air is separated into air passing through the heater 7 and air bypassing the heater 7 in accordance with the position of the air mix damper 8, and is mixed again downstream of the heater to adjust the temperature. The conditioned air is blown into the vehicle interior from the outlet selected by the switching mode damper.

FIG. 4 is a cross-sectional view of the refrigerant pipe penetration portion of the cooler case, and is a cross-sectional view taken along line AA of FIG. In the figure, 3a is an upper cooler case, 3b is a lower cooler case, and these are integrated vertically to constitute the cooler case 3 described above. Reference numeral 24 denotes a seal wall provided at the butting portion of the upper and lower cooler cases, and has a bulge outward. Reference numeral 26 denotes a through hole provided at the boundary between the upper and lower cooler cases 3a and 3b on the seal wall. Reference numeral 23 denotes an insulation that is fitted and mounted in the through hole 26 and is formed of a foamed resin material or the like. It is a dimension that can be secured. By this compression, the insulation is held and fixed to the seal wall 24 of the cooler case without any gap.

[0007] The refrigerant liquid pipe 2
Since two independent through-holes are formed in which the 0 and refrigerant low-pressure pipes 21 are fitted with an appropriate amount of compression, this insulation is fitted and mounted on the refrigerant pipes 20 and 21 without gaps. The evaporator 6 to which the two refrigerant pipes 20 and 21 are connected is connected to the refrigerant pipe by an insulation 23.
Is mounted on the cooler cases 3a and 3b.
At this time, the pipe is held and fixed by the seal wall 24 of the cooler case via the insulation 23.

The refrigerant liquid pipe 20 and the refrigerant low-pressure pipe 21
A flange joint 22 is brazed to the end of the cooler case 3. After the flange joint 22 is assembled into the cooler case 3, the flange joint 22 occupies a position close to the wall surface of the seal wall 24 of the cooler case 3. Each of the refrigerant pipes 20 and 21 is connected to a refrigerant circuit of an air conditioner (not shown) installed in a vehicle engine room via the flange joint 22.

[0009]

As described above, the seal between the refrigerant pipes 20, 21 and the cooler case 3 is performed by the insulation 23 attached to the through hole 26 provided in the seal wall 24. Due to the compression deformation of the insulation 23 due to the inner circumference of the through hole 26, the insulation is shifted inside the cooler case 3,
It comes off from the through-hole 26, and the through-hole 26 and the refrigerant pipes 20, 21
This causes a problem that air in the cooler case leaks to the outside, and moisture condensed on the refrigerant pipes 20 and 21 leaks from the gap and drops on the floor of the vehicle interior. .

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and prevent the insulation from slipping out of the through hole and into the cooler case.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an air inlet at one end and an air outlet at the other end in a casing. In an air flow path formed between the outlet and the outlet, a blower fan, an evaporator, an air mix damper, a heater, and an outlet switching mode damper are provided, and a refrigerant pipe connected to the evaporator forms a part of the casing. A vehicle air conditioner penetrating a side portion of a cooler case has the following features. (1) A seal wall having a double structure is formed in a coolant pipe penetrating portion of the cooler case, a through hole is provided in the seal wall having the double structure, and the coolant pipe is connected to the coolant pipe via an insulation attached to the coolant pipe. Then, it was held by the through hole. (2) In the vehicle air conditioner according to the above item (1), the insulation provided in the refrigerant pipe has the same shape as the through hole provided in the double-structured sealing wall,
It was inserted into the two through holes and fitted. (3) In the air conditioner for a vehicle according to the above mode (1), among the through holes provided in the double-structured sealing wall, the through hole in the inner wall is formed smaller than the through hole in the outer wall, and is mounted on the refrigerant pipe. The insulation was fitted into the through-hole of the outer wall, and the inner end face of the insulation was brought into close contact with the periphery of the through-hole of the inner wall.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of a coolant pipe penetrating portion of a cooler case according to a first embodiment of the present invention.
In the figure, reference numeral 25 denotes a second seal wall provided inside the conventional seal wall 24, and 27 denotes a through hole provided in the second seal wall 25, which is provided in the first seal wall 24. It is a hole having the same diameter as the through hole 26. Insulation 23 is compressed in a suitable state with both through holes 2
6 and 27 are attached. The configuration of the other parts is the same as that of the conventional technology (FIG. 4), and thus the description is omitted.

The distance between the two seal walls 24, 25 is set to, for example, about 5 to 8 times the thickness of the seal wall 24. Further, the insulation 23 is formed of a foamed resin material or the like as in the prior art, and the outer dimensions of the insulation 23 are formed to the dimensions of the through holes 26 and 27 so as to ensure that an appropriate compression amount can be secured over the entire circumference. Therefore, both through holes 26, 2
7 and is firmly held by the two seal walls 24 and 25. Therefore, the insulation is prevented from coming off the through hole.

FIG. 2 is a cross-sectional view of a coolant pipe penetration portion of a cooler case according to a second embodiment of the present invention. In the figure, reference numeral 27A denotes a through hole provided in the second seal wall 25, which is a smaller through hole than the through hole 26 in the first seal wall 24. The insulation 23 cannot pass through this hole. The refrigerant pipes 20 and 21 are loosely inserted into the through holes. The insulation 23 is attached to the through hole 26 of the first seal wall 24 in an appropriately compressed state, and is also in close contact with the surface of the second seal wall 25 around the through hole. The configuration of other parts is the first
This is the same as the embodiment.

In this embodiment, the second seal wall 2
Since the role of 5 serves as a stopper, the insulation is prevented from coming off from the through-hole 26 and slipping inside the cooler case, so that a gap is prevented from being formed between the through-hole and the insulation.

[0016]

In the air conditioner for a vehicle according to the present invention, a double-walled sealing wall is formed in the cooling pipe through-hole of the refrigerant pipe, and a through-hole is provided in the double-walled sealing wall. Since the insulation is held by the through-hole via the insulation attached to the refrigerant pipe, it is possible to prevent the insulation from coming off the through-hole and slipping into the cooler case. This can prevent the air in the cooler case from leaking and prevent moisture condensed on the refrigerant pipe from dropping into the vehicle interior.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a coolant pipe penetration portion of a cooler case according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a refrigerant pipe penetration portion of a cooler case according to a second embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a conventional vehicle air conditioner.

FIG. 4 is a cross-sectional view (cross-sectional view taken along the line AA in FIG. 3) of a refrigerant pipe penetration portion of a conventional cooler case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Fan case 3 Cooler case 4 Heater case 5 Blow fan 6 Evaporator 7 Heater 8 Air mix damper 20 Refrigerant liquid piping 21 Refrigerant low pressure piping 22 Flange joint 23 Insulation 24 Seal wall 25 Second seal wall 26 Through hole 27 Penetration Through hole 27A with the same diameter as hole 26 Through hole smaller than through hole 26

Claims (3)

[Claims] An air fan formed in a casing having an air inlet at one end and an air outlet at the other end, formed in an air flow passage formed between the air inlet and the air outlet. An air conditioner for a vehicle, comprising: an evaporator, an air mix damper, a heater, and an air outlet switching mode damper, wherein a refrigerant pipe connected to the evaporator penetrates a side portion of a cooler case forming a part of the casing. A double-structured seal wall is formed in the refrigerant pipe penetration part of the case, a through-hole is provided in the double-structured seal wall, and the refrigerant pipe is connected to the through-hole through an insulation attached to the refrigerant pipe. An air conditioner for a vehicle, wherein the air conditioner is held by: 2. A through-hole provided in a double-structured sealing wall has the same shape, and an insulation attached to a refrigerant pipe is inserted into and inserted into both of the through-holes. A vehicle air conditioner according to claim 1. 3. A through-hole formed in the seal wall of the double structure, wherein a through-hole in the inner wall is formed smaller than a through-hole in the outer wall, and the insulation attached to the refrigerant pipe is fitted into the through-hole in the outer wall. The vehicle air conditioner according to claim 1, wherein an inner end surface of the insulation is closely attached to a periphery of a through hole of the inner wall.