JP2002172928A - Mounting structure of cleaning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a cleaning unit capable of reducing the cost in comparison with a conventional cleaning unit while ensuring the sealing characteristic same as that of the conventional cleaning unit, and allowing an expansion valve stored in a case to be mounted and demounted from an engine room side. SOLUTION: Connection sides of pipes 29, 30 of the expansion valve 3 are extended to form a mounting part 35, a tip part of the mounting part 35 is projected from an opening part 6 of the cleaning unit 1, an outer periphery of the projecting part of the mounting part 34 is surrounded by a seal member 36, the opening parts 6, 9 of the cleaning unit 1 and a dash panel 8 are formed relatively larger than the outer shape of the expansion valve 3 including the seal member, an outer periphery of the seal member 35 is surrounded by a second seal member 37, and the seal member 37 has the outer shape relatively larger than the opening parts 6, 9, and has a hole 38 relatively smaller than the outer shape of the seal member 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a cooling unit of an air conditioner installed in a vehicle or the like, for example, in the vicinity of an opening of a dash panel in a vehicle interior.

[0002]

2. Description of the Related Art A cooling unit constituting a vehicle air conditioner of this type has a block-type expansion valve, and is disposed on a dash panel for separating an engine room and a vehicle interior from the vehicle interior. It is connected to a condenser etc. in the engine room by piping.

[0003] When a block type expansion valve is used as an expansion valve connected to an evaporator disposed in the cooling unit, a cooling unit mounting structure disclosed in Japanese Patent Application Laid-Open No. 9-123749 is disclosed. .Structure for mounting an expansion valve to a unit, JP-A-Hei 1
As shown in a seal cap and the like of an automotive air conditioner according to JP-A-119558, various modes exist.

An example of the mounting structure of the cooling unit will be outlined with reference to FIG. In the cooling unit 100, an evaporator 102 is housed in a case 101, and a block-type expansion valve 103 is directly connected to the evaporator 102 via a connector 104. The expansion valve 103 is also provided with the evaporator 1
02 as well as the case 101 of the cooling unit 100
Is housed inside. The expansion valve 103 has a pipe connection connector 105 having a high-pressure passage and a pressure passage therein fixed to the side opposite to the evaporator connection side.
This pipe connection connector 105 is connected to a high pressure side pipe 106.
The low-pressure side pipe 107 is connected to the high-pressure side pipe 106 by a mounting member 108 provided at the end of the low-pressure side pipe 107. Dash panel 110 provided facing this opening 109
Of the engine room 112 from the opening 111.

The gap between the pipe connection connector 105 and the opening 109 of the case 101 is sealed by the first seal member 113 alone, and the gap between the pipe connection connector 105 or the case 101 and the opening of the dash panel 110 is formed. The second seal member 114 is interposed between the dash panel 110 and the case 101 to form a gap between the dash panel 111 and the dash panel 110 and the side of the cabin.
The second seal member 114 is sandwiched between the case 5 and the case 101 to be sealed. Plate member 11 for each vehicle body
5 is used to increase the inner diameter of the opening of the dash panel 110 by 111 so that the seal member 114 can be sandwiched so that the expansion valve 103 can be taken out from the engine room side.

[0006]

On the other hand, in recent years, there has been a demand for a reduction in the cost of an air conditioner for a vehicle, and the applicant of the present invention has responded to this demand by reducing the cost around the expansion valve of the cooling unit. It is necessary to reconsider the structure and reduce the number of parts. However, removing the pipe connection connector and disposing the entire expansion valve in the engine room may cause the temperature sensing element of the expansion valve to corrode due to rainwater or the like entering from the outside of the vehicle, or the high temperature in the engine room may cause the temperature sensing element to be damaged. It may not work properly.

[0007] In addition, there is still a need to make the expansion valve detachable from the engine room side in order to perform maintenance or replacement of the expansion valve after the cooling unit is mounted on the vehicle.

Therefore, in the present invention, the cooling is made possible by reducing the cost as compared with the conventional product while securing the same sealing performance as the conventional product, and also enabling the expansion valve housed therein to be detachable from the engine room side. An object of the present invention is to provide a unit mounting structure.

[0009]

According to the present invention, there is provided a cooling unit mounting structure comprising: a cooling heat exchanger; and an expansion connected to the cooling heat exchanger and the high-pressure pipe and the low-pressure pipe. In a mounting structure of a cooling unit in which a valve is housed and an opening is formed on a side facing the opening of the dash panel, the expansion valve extends a side connected to the high-pressure pipe and the low-pressure pipe. A mounting portion is formed, and a distal end portion of the mounting portion protrudes from an opening of the cooling unit, and an outer periphery of the distal end portion of the mounting portion is surrounded by a first seal member made of an elastic member. The openings of the cooling unit and the dash panel are formed relatively larger than the outer shape of the expansion valve including the first seal member. Is further surrounded by a second seal member made of an elastic member, and the second seal member is formed to have an outer shape relatively larger than the opening of the cooling unit and the dash panel, and It has a hole relatively smaller than the outer shape of the member (claim 1).

[0010] With this configuration, the outer periphery of the first seal member is surrounded by the second seal member, and the cooling unit is arranged near the dash panel such that the opening faces each other. Since the second seal member is sandwiched between the dash panel and the second seal member pressing the first seal member, a restoring force acts on the first seal member. The two seal members press against each other, so that the opening of the cooling unit is closed and the space between the vehicle interior side surface near the opening of the dash panel and the outer surface of the cooling unit is closed. As a result, it is possible to maintain the same good sealing properties as the conventional one. On the other hand, by extending the side of the expansion valve that is connected to the high-pressure pipe and the low-pressure pipe to form the mounting portion, it is possible to eliminate the piping connector, thereby reducing the cost of the cooling unit. Can be achieved. Further, the first seal member and the second seal member are only pressed against each other, and the opening of the cooling unit and the dash panel is closer than the outer shape of the expansion valve including the first seal member. Is relatively small, so that the expansion valve can be attached and detached from the engine room side with the first seal member attached, so that maintenance work and replacement of the expansion valve are easy, and the plate for each vehicle body is omitted. Therefore, the number of parts can be reduced.

In the cooling unit mounting structure according to the present invention, the hardness of the elastic member used for the first seal member is greater than the hardness of the elastic member used for the second seal member. (Claim 2). Accordingly, when the expansion valve is inserted into the hole of the second seal member to detach and attach the expansion valve with the first seal member attached, the hole of the second seal member is pressed and the diameter is expanded. The work of taking out the valve to the engine room side and attaching it from the engine room side becomes easier.

Further, the cooling unit mounting structure according to the present invention houses a cooling heat exchanger and an expansion valve connected to the cooling heat exchanger and the high-pressure pipe and the low-pressure pipe. In the cooling unit mounting structure in which an opening is formed on a side facing the opening of the panel, the expansion valve has a mounting portion formed by extending a side connected to the high-pressure pipe and the low-pressure pipe. The distal end portion of the mounting portion protrudes from the opening of the cooling unit, the outer periphery of the distal end portion of the mounting portion is surrounded by a sealing member made of an elastic member, and the opening of the cooling unit and the dash panel are opened. Is formed relatively larger than the outer shape of the expansion valve including the seal member, and is an outer periphery of the seal member and an opening of the cooling unit. Holding member is attached to the edge portion,
The holding member has a flange portion whose outer shape is relatively larger than the opening of the cooling unit, and an outer insertion portion in which a hole smaller than the outer shape of the seal member is formed. (Claim 3). Then, separately from the seal member, a seal member having an outer shape relatively larger than an opening of the dash panel and formed of an elastic member is attached to the outside of the cooling unit (claim). Item 4).

[0013] With this configuration, the outer periphery of the seal member attached to the attachment portion of the expansion valve is extrapolated by the extrapolation portion of the holding member, and at the same time, the flange of the holding member is attached to the periphery of the opening of the case of the cooling unit. By bringing the portions into contact, the sealing member is compressed and a restoring force acts on the sealing member, so that the opening of the cooling unit is closed. Further, by disposing the cooling unit in the vicinity of the dash panel so that the openings face each other, a seal member separate from the preceding seal member is sandwiched between the cooling unit and the dash panel. The space between the inside surface of the cabin near the opening and the outside surface of the cooling unit is closed. As a result, the same good sealing performance as that of the conventional one can be maintained. On the other hand, by extending the side of the expansion valve connected to the high-pressure side pipe and the low-pressure side pipe to form the mounting portion, it becomes possible to eliminate the pipe connection connector, thereby reducing the cost of the cooling unit. Can be achieved. In addition, since the outer shape of the expansion valve including the seal member is relatively smaller than the openings of both the cooling unit and the dash panel, only the holding member is removed, and the expansion valve is attached with the seal member from the engine room side. The maintenance work and the replacement of the expansion valve are easy, and the plate for each vehicle body can be omitted.
The number of parts can be reduced.

The expansion valve has a temperature sensing element for sensing the temperature of the refrigerant on the outer surface side, and the temperature sensing element is located in a case of the cooling unit. . As described above, the temperature sensing element of the expansion valve is located in the case of the cooling unit and is not projected to the engine room side, so that the temperature sensing element is corroded by rainwater that has entered from outside the vehicle, or the high temperature inside the engine room. It is possible to prevent the temperature-sensitive element from malfunctioning due to air.

Further, one of the low-pressure side pipe and the high-pressure side pipe has a connecting portion at a distal end portion for connecting to the expansion valve, and is connected to the other pipe by connecting means formed at this connecting portion. It is characterized by being connected (claim 5). Thereby, even if the pipe connection connector is deleted, the low-pressure side pipe and the high-pressure side pipe can be reliably connected to the expansion valve.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a first embodiment of the present invention, in which a cooling unit 1 is disposed inside a vehicle compartment, and an evaporator 2 as a heat exchanger for cooling, and a connector 4 is connected to the evaporator 2. And a block type expansion valve 3 which is directly connected through the expansion valve 3.
The evaporator 2 is, for example, a laminated type formed by alternately laminating tubes and fins. However, since the configuration is publicly known, the description is omitted.

The expansion valve 3 is connected to a piping together with a compressor, a condenser and the like (not shown) to form a refrigeration cycle. The expansion valve 3 has an inflow passage 11 through which a refrigerant flows from the condenser side into the evaporator 2 and an outflow passage 12 through which the refrigerant flows out from the evaporator 2 to the compressor. The inflow passage 11 is formed by the evaporator 2. And a high-pressure side passage 15 communicating with the condenser side, and an orifice 16 communicating with the low-pressure side passage 14 and the high-pressure side passage 15.
It is composed of

The high-pressure side passage 15 has a space 15a formed in a direction intersecting with the direction in which the expansion valve 3 is connected to the evaporator 2 (downward after the expansion valve 3 is mounted).
5a is connected at one end to the evaporator 3 of the expansion valve 3 at the other end.
And a connection portion 15b formed substantially in the same direction as the connection direction (the direction toward the engine room of the expansion valve 3), and a closing lid 17 is fitted in the space 15a. The low-pressure side passage 14 is opened to the side opposite to the connection portion 15b of the expansion valve body 13 with respect to the high-pressure side passage 15, and the connector 4 is connected to an open end.

The outflow passage 12 is formed in the same direction as the opening end surface of the low-pressure passage 14 of the expansion valve body 13 to the opening end surface of the high-pressure passage 15, and the connector 4 is connected to one opening end surface 12a. Then, the gasified refrigerant of the evaporator 2 flows out from the connecting portion 12b formed at the other open end.

The expansion valve body 13 has an operating rod 19 which penetrates the outflow passage 12 and the low-pressure passage 14 through a mounting hole 18 formed in the radial direction with respect to the low-pressure passage 14 and the high-pressure passage 15.
The operating rod 19 further penetrates the orifice 16 with a gap around it, and the tip end reaching the high-pressure side passage 15 is connected to the ball-shaped valve body 20. This valve 2
0 contacts the valve body receiver 21 housed in the space 15a,
The orifice 16 is always urged in a direction to close the orifice 16 by a spring 22 elastically mounted between the valve body receiver 21 and the lid 17.

The proximal end of the operating rod 19 is connected to a diaphragm 24 constituting a temperature-sensitive element 23.
4 is a housing 25 mounted on the expansion valve body 13.
The inside is divided into a diaphragm chamber 26 sealed between the housing 25 and a pressure equalizing chamber 27 communicating with the outflow passage 12. A known diaphragm driving fluid is sealed in the diaphragm chamber 26, and the diaphragm driving fluid is gasified in response to heat of a certain level or more transmitted through the operating rod 19, and the outside of the diaphragm 24. Press the side.

As a result, the diaphragm 24 is displaced in the axial direction of the operating rod 19 due to the pressure difference between the pressure from the diaphragm chamber 26 and the refrigerant pressure from the outflow passage 12 acting directly. The valve body 20 is moved to a position where the pressure acting on the diaphragm 24 via the diaphragm 24 and the biasing force of the spring 22 are balanced, and the opening of the expansion valve 3 is adjusted. Thus, the valve body 20 and the orifice 16
Thus, an expansion portion is formed in the low-pressure passage 14 from the high-pressure passage 15 to decompress and expand the refrigerant in a mist state.

The low pressure side pipe 30 to the condenser side and the high pressure side pipe 33 from the condenser side are connected to the connection parts 12b and 15b of the expansion valve body 13 in the form of a thin plate.
1 are connected. This connection 3
1 is provided near the opening end of the low-pressure side pipe 30 in the embodiment, and a cutout portion 32 opened laterally as a connecting means of the other pipe is provided on a side opposite to a side where the low-pressure side pipe 30 is inserted. The high-pressure side pipe 29 is connected to the notch 32 by mounting a portion near the open end thereof. The connecting portion 31 is formed with a pair of screw holes 33 extending in the axial direction of the pipes 29, 30. A screw (not shown) is connected to the screw hole of the connecting portion 31 and the expansion valve body 13.
Is fixed to the expansion valve 3 by being inserted into the connection hole 28. Although not shown, the connecting portion 31 is connected to the high pressure side pipe 3.
3 may be provided.

The expansion valve 3 extends from the thermosensitive element 23 on the pipe 29, 30 side to form a mounting portion 35,
The tip of the mounting portion 35 projects out of the case 5 from the opening 6. A seal member 36 formed of an elastic member is attached to an outer periphery of a portion of the attachment portion 35 outside the case 5. The outer shape of the expansion valve 3 including the seal member 36 is relatively smaller than the opening 6 of the case 5 as shown in FIG. In the embodiment, the seal member 36 is formed of a band-shaped member as shown in FIG. 3, and is attached by being wound around the attachment portion 35 about one round. However, the configuration of the sealing member 36 is not necessarily limited to the above-mentioned band-shaped one, and the pipe 3 of the expansion valve 3
It is also possible to adopt an annular shape having a hole punched out in the same shape as the outer shape as viewed from the mounting side with 0, 33, and to extrapolate to a portion outside the case 5 in the mounting portion 35 of the expansion valve 3.

A seal member 37 is attached to the seal member 36 attached to the attachment portion 35 so as to surround the entire outer periphery of the seal member 36. The seal member 37 is made of an elastic member, and has a hole 38 for externally inserting the seal member 36. The shape of the hole 38 is slightly smaller than the outer shape of the expansion valve 3 including the seal member 36, so that the hole 38 can be pressed against the seal member 36 from the outer peripheral side. In the embodiment, the case 5 and the dash panel 8 described below are formed in a two-layer structure, but may be formed in a single-layer structure instead of the two-layer structure. Also, the sealing member 37
Is smaller in hardness than the seal member 36. To achieve such a hardness ratio, for example, the seal member 36
When rubber is used as the elastic member forming
Urethane is used for the seal member 37.

A dash panel 8 that partitions a vehicle interior 39 and an engine room 40 is located on the side of the cooling unit 1. The dash panel 8 faces the opening 6 of the case 5. An opening 9 is opened at the position. The opening 9 is relatively larger than the outer shape of the expansion valve 3 including the seal member 36.
Is formed so as to be relatively smaller than the outer shape of a state further surrounded by a seal member 37. Further, a flange 41 extending toward the vehicle interior 39 is formed on the periphery of the opening 9.

With this configuration, the cooling unit 1 is mounted in the following procedure, for example. First, the expansion valve 3 on which the seal member 36 is attached in advance is connected to the connector 4. With the connection of the expansion valve 3, the mounting portion 35 is located on the pipe side 2 with respect to the temperature-sensitive element 23.
Since the portions 9 and 30 are extended, the temperature sensing element 2
3 is located in the case 5 and has a sealing portion 36 of the mounting portion 35.
Is located in the vicinity of the opening 6 outside the case 5. Next, after surrounding the outer periphery of the seal member 36 with the seal member 37, the cooling unit 1 is
Is moved toward the dash panel 8 so that the opening 6 of the dash panel 8 and the opening 9 of the dash panel 8 are aligned. As a result, the outer shape of the seal member 37 is larger than that of the openings 6 and 9, so that the seal member 37 is
It is compressed and is pushed to the case 5 side by the flange 41 and spreads along the surface of the case 5 to press the seal member 36. Is closed, and the space between the opening 9 of the dash panel 8 and the case 5 is also closed.

The expansion valve 3 including the sealing member 36
The outer shape of the opening 5 of the case 5 and the dash panel 8
The sealing member 37, which is smaller than the opening 9 and is in contact with the sealing member 36, is not fixed to the sealing member 36 and is more flexible than the sealing member 36. As the hole is expanded by the pressing force,
The expansion valve 3 can be easily taken out of the engine room 40 and attached even after the cooling unit 1 is attached.

As described above, the low-pressure side pipe 30, the high-pressure side pipe 33 and the expansion valve 3 can be connected without passing through the pipe connection connector, so that the pipe connection connector can be omitted. The expansion valve 3 can be taken out from the engine room 40 side and attached without using a vehicle body-specific plate member, so that the vehicle body-specific plate member can be omitted, thereby reducing manufacturing costs by reducing the number of parts. Can be planned. Further, since the expansion valve 3 can be taken out into the engine room 40, maintenance and replacement of the expansion valve 3 can be achieved. Furthermore, since the temperature sensing element 23 stays in the case 5 of the cooling unit 1, the temperature sensing element 23 is corroded by rainwater or the like entering from outside the vehicle, or the temperature sensing element 23 operates normally due to high heat in the engine room 40. The problem of not being able to do so can be avoided.

FIG. 5 shows a second embodiment of the present invention. This embodiment will be described below with reference to FIG. However, the same components as those in the previous embodiment are denoted by the same reference numerals, and description thereof will be omitted.

A seal member 36 is attached to a portion of the attachment portion 35 of the expansion valve 3 outside the case 5. The seal member 36 is formed of an elastic member, and is formed by winding a band-shaped member around the mounting portion 35 or providing a hole having substantially the same shape as the shape of the mounting portion 35 as viewed from the side where the pipes 30 and 33 are mounted. It is attached by extrapolating it to the attachment part 35.

A holding member 43 is attached to the outer periphery of the seal member 36 and to the periphery of the opening 6 of the cooling unit. The holding member 43 has, for example, flexibility, and has an outer insertion portion 44 having a hole 44a having a large inner diameter slightly smaller than the outer shape of the attachment portion 25 in a state where the seal member 35 is attached. In addition, it has a flange portion 45 that comes into contact with the peripheral portion of the opening 6. The flange portion 45 is provided with a plurality of protruding portions 46 extending toward the vehicle cabin 39, and the width of the confronting protruding portions 46 is slightly larger than the inner diameter of the opening 6. I have.

With this configuration, the external insertion portion 44 of the holding member 43 is externally inserted into the mounting portion 35 of the expansion valve 3 to which the sealing member 36 is mounted in advance, and the sealing member 36 and the opening By inserting the protrusion 46 between the inner peripheral surface of the opening 6 and the flange 45 in contact with the peripheral portion of the opening 6, the outer insertion portion 44 of the holding member 43
5 is pressed from the outer peripheral side, and the protrusion 46 is pressed against the opening 6, so that the opening 6 can be closed. Further, the expansion valve 3 can be taken out into the engine room 40 or mounted from the engine room 40 side only by removing the holding member 43 even in the state where the seal member 35 is mounted.

Therefore, also in this embodiment, the low pressure side pipe 30, the high pressure side pipe 33 and the expansion valve 3 can be connected without the intervention of the pipe connection connector, so that the pipe connection connector is omitted. Therefore, the manufacturing cost can be reduced by reducing the number of parts.
Further, since the expansion valve 3 can be taken out into the engine room 40, maintenance and replacement of the expansion valve 3 can be achieved. Further, since the temperature-sensitive element 23 stays in the case 5 of the cooling unit 1, the temperature-sensitive element 23 is corroded by rainwater or the like that has entered from outside of the vehicle, or the temperature in the engine room is reduced.
The problem that the temperature sensing element 23 does not operate normally due to the high heat can be avoided.

[0036]

As described above, according to the first aspect of the present invention, the outer periphery of the first seal member is surrounded by the second seal member, and the cooling unit is arranged near the dash panel such that the opening faces. By doing so, the second seal member is sandwiched between the cooling unit and the dash panel, and the restoring force acts on the first seal member at the same time that the second seal member presses the first seal member. The first seal member and the second seal member are pressed against each other, so that the opening of the cooling unit is closed, and the inside surface of the vehicle interior near the opening of the dash panel and the outside surface of the cooling unit. Since the gap is closed, good sealing properties can be obtained.

On the other hand, according to the third and fourth aspects of the present invention, the outer periphery of the seal member attached to the attachment portion of the expansion valve is extrapolated by the extra insertion portion of the holding member, and at the same time, the case of the cooling unit case is removed. By bringing the flange of the holding member into contact with the periphery of the opening, the sealing member is compressed and a restoring force also acts on the sealing member, whereby the opening of the cooling unit is closed, and the cooling unit is opened near the dash panel. By disposing the parts facing each other, a separate seal member is sandwiched between the cooling unit and the dash panel, and the space between the vehicle interior side surface near the opening of the dash panel and the outer side surface of the cooling unit is closed. Therefore, good sealing properties can be obtained.

In addition, according to the two inventions, by extending the side of the expansion valve connected to the high pressure side pipe and the low pressure side pipe to form the mounting portion, it becomes possible to eliminate the pipe connection connector. In addition, since the expansion valve can be taken out from the inside of the engine room with the seal member attached, the plate for each vehicle body can be eliminated, the cost of the cooling unit can be reduced, and the maintenance and expansion valve can be achieved. It is also possible to simplify the work such as replacement of the device.

According to the second aspect of the present invention, when inserting the expansion valve into the hole of the second seal member to detach the expansion valve with the first seal member attached, Since the member is pressed to expand the diameter, it is easier to take out the expansion valve to the engine room side and attach it from the engine room side. be able to.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a cooling unit mounted near a dash panel opening as viewed from above according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view illustrating a configuration of an expansion valve in a state where a seal member is attached to an attachment portion.

FIG. 3 is an explanatory diagram showing a state of an expansion valve in a state where a seal member is mounted on a mounting portion, as viewed from a pipe connection side.

FIG. 4 is an explanatory diagram showing a configuration in which a pipe is attached to an expansion valve without passing through a pipe connector.

FIG. 5 is a partial cross-sectional view showing a state where a cooling unit is mounted near an opening of a dash panel as viewed from above according to a second embodiment of the present invention.

FIG. 6 is a partial cross-sectional view showing an example of a conventional cooling unit mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling unit 2 Evaporator (cooling heat exchanger) 3 Expansion device 5 Case 6 Opening 8 Dash panel 9 Opening 23 Temperature sensing element 30 Low pressure side pipe 33 High pressure side pipe 31 Connecting part 35 Mounting part 36 Sealing member 37 Sealing member 38 hole 40 inside the engine room 43 holding member 44 outer insertion portion 44a hole 45 flange

Claims (6)

[Claims] A cooling heat exchanger and an expansion valve connected to the cooling heat exchanger and the high-pressure pipe and the low-pressure pipe are housed, and an opening is provided on a side facing the opening of the dash panel. In the mounting structure of the cooling unit, the expansion valve has a mounting portion formed by extending a side connected to the high-pressure pipe and the low-pressure pipe, and a distal end portion of the mounting portion is formed by the cooling unit. And an outer periphery of a tip portion of the mounting portion is surrounded by a first seal member made of an elastic member, and the openings of the cooling unit and the dash panel are formed by the first seal member. The outer periphery of the first seal member is further surrounded by a second seal member made of an elastic member, and the second seal member is Wherein the outer shape is formed relatively larger than the opening of the cooling unit and the dash panel, and has a hole relatively smaller than the outer shape of the first seal member. . 2. The cooling unit according to claim 1, wherein the hardness of the elastic member used for the first seal member is higher than the hardness of the elastic member used for the second seal member. Mounting structure. 3. A cooling heat exchanger and an expansion valve connected to the cooling heat exchanger and the high-pressure pipe and the low-pressure pipe are housed, and an opening is provided on a side facing the opening of the dash panel. In the mounting structure of the cooling unit, the expansion valve has a mounting portion formed by extending a side connected to the high-pressure pipe and the low-pressure pipe, and a distal end portion of the mounting portion is formed by the cooling unit. And the outer periphery of the distal end portion of the mounting portion is surrounded by a seal member made of an elastic member, and the openings of the cooling unit and the dash panel are formed of an expansion valve including the seal member. The holding member is attached to the outer periphery of the seal member and to the periphery of the opening of the cooling unit, and the holding member is A cooling unit having an outer shape having a flange portion relatively larger than an opening of the cooling unit, and an outer insertion portion having a hole relatively smaller than the outer shape of the sealing member. Mounting structure. 4. A seal member having an outer shape relatively larger than an opening of the dash panel and formed of an elastic member is attached to the outside of the cooling unit separately from the seal member. The cooling unit mounting structure according to claim 3, wherein 5. The expansion valve has a temperature sensing element for sensing a temperature of a refrigerant on an outer surface side, and the temperature sensing element is configured to cool the cooling valve when the expansion valve is connected to the cooling heat exchanger. The cooling unit mounting structure according to claim 1, wherein the cooling unit is mounted in a case of the unit. 6. One of the low-pressure side pipe and the high-pressure side pipe has a connecting portion for attaching to the expansion valve at a distal end portion, and is connected to the other pipe by a connecting means formed at the connecting portion. The mounting structure of the cooling unit according to claim 1, wherein the cooling unit is mounted.