JP2001000027U - Piping structure of automotive air conditioner - Google Patents

Abstract

(57) [Problem] To improve the efficiency of assembly work by simplifying the work of connecting pipes. An integral expansion valve (5) connected to the evaporator (2) via a connection joint member (4) outside the air passage portion of the evaporator (2) inside a vehicle cabin (CR).
A block connector 8 fixed to the integral expansion valve and connected to other cooling cycle components provided in the engine room ER, and the block connector 8 is provided in a through hole O opened in the dash panel 6. And a seal is provided between the block connector 8 and the through hole O, and an end face for connection of the block connector 8 with another cooling cycle component device is located on the engine room ER side and is exposed. It is a piping structure of an air conditioner for a vehicle, characterized by that.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an air conditioner for a vehicle, and more particularly to an improvement in a piping structure of a cooler unit.

[0002]

[Prior art]

 Generally, an air conditioner for a vehicle has a cooler unit in which an evaporator for cooling air blown into a vehicle compartment is housed. This cooler unit is also provided with an expansion valve that controls the amount of refrigerant flowing into the evaporator.However, this expansion valve is located at the portion of the flow of air that is heat-exchanged by the evaporator. Many.

However, if an expansion valve is provided at such a position, air that flows through the cooler unit and exchanges heat with the evaporator hits the expansion valve, and the air flow resistance increases.

Therefore, a recent air conditioner for a vehicle has a structure in which an expansion valve is provided outside a cooler unit case (for example, see Japanese Utility Model Application Laid-Open No. 63-96,918). . As shown in FIG. 4, the air conditioner for an automobile is provided with an evaporator 2 in a cooler unit case 1 disposed in a passenger compartment CR, a refrigerant inlet side conduit 3a connected to the evaporator 2 and a refrigerant outlet. The first pipe 3 composed of the side pipe 3b is connected to the second pipe 7 via the joint member 4, and the second pipe 7 is led out of the cooler unit case 1. The expansion valve 5 is attached so that a part of the integrated expansion valve 5 enters into the opening of the dash panel 6. The integral type expansion valve 5 will be described later.

[0005]

[Problems to be solved by the invention]

 However, in such a piping structure, the second piping 7 and the like are required between the expansion valve 5 and the joint member 4, which not only increases the number of parts, but also requires a plurality of connecting operations. And the speed of the production line may be reduced.

The present invention has been made in view of the above-described problems, and has as its object to improve the efficiency of assembly work by simplifying the work of connecting pipes. Another object is to prevent noise generated from the expansion valve from being transmitted to the passenger compartment.

[0007]

[Means for Solving the Problems]

 The object of the present invention is achieved by the following means.

(1) An evaporator in a cooler unit case attached to a dash panel that separates a vehicle compartment from an engine room on the vehicle compartment side and other cooling cycle components in the engine room. An integrated expansion valve connected to the evaporator through a connection joint member outside the air passage portion of the evaporator in the vehicle interior, A block connector fixed to the integral expansion valve and connected to another cooling cycle component device provided in the engine room, wherein the block connector is provided in a through hole opened in the dash panel. To seal the gap between the block connector and the through hole, and in front of the block connector. Piping structure of an automotive air conditioning system, characterized in that the end face for connection to another cooling cycle component devices are exposed are positioned in the engine room side. According to the present invention, the connection work is extremely simple as compared with the conventional piping structure, the assembling workability is greatly improved, and a reduction in the speed of the production line can be prevented.

(2) There is a pipe comprising a refrigerant inlet side pipe and a refrigerant outlet side pipe connected to the evaporator, and the joint member is an end of the pipe extending to the outside of an air passage portion of the evaporator. The piping structure of the air conditioner for a vehicle according to the above (1), wherein the integral expansion valve is provided to the joint portion and the integral expansion valve is fixed to the joint member.

(3) The piping of the air conditioner for an automobile according to the above (1) or (2), wherein the joint member and the integral type expansion valve are arranged in the cooler unit case. Construction.

(4) The cooler unit case is provided with an expansion valve housing for disposing the joint member and the integrated expansion valve. The piping structure of the air conditioner for a vehicle according to any one of the above.

(5) The piping structure for an air conditioner for a vehicle according to the above (4), wherein a heat insulating material is affixed in the expansion valve housing portion. With this configuration, the noise generated from the expansion valve is not transmitted to the vehicle interior.

(6) The vehicle according to any one of (1) to (5), wherein the block connector and the integrated expansion valve are connected to the joint member by a screw member. Structure of air conditioner for air conditioner.

(7) The air conditioner for a vehicle according to any one of (1) to (6), wherein the block connector is formed integrally with the integral type expansion valve. Construction.

[0015]

[Embodiment of the invention]

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic explanatory view showing an embodiment of a piping structure of an automotive air conditioner according to the present invention, FIG. 2 is a cross-sectional view showing a main part of FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 5 is a schematic explanatory view showing an embodiment, and the same members as those shown in FIG. 4 are denoted by the same reference numerals.

In FIGS. 1 and 2, the interior of the vehicle compartment CR and the engine room ER are partitioned by a dash panel 6, and a cooler unit case 1 is provided inside the vehicle compartment CR.

The cooler unit case 1 houses an evaporator 2 therein, and the evaporator 2 is connected to a first pipe 3 including a refrigerant inlet side conduit 3a and a refrigerant outlet side conduit 3b. In the present embodiment, the first pipe 3 extends from the tank 2a of the evaporator 2 to the outside of the air passage of the evaporator 2, and a joint member 4 is provided at an end.

The cooler unit case 1 is provided with an expansion valve accommodating portion 1 a, a heat insulating material d (see FIG. 2) is affixed inside, and an integral expansion valve 5 and a joint member 4 are supported. The heat insulating material d has a sound insulating effect so that the noise of the integrated expansion valve 5 is not leaked to the outside.

On the other hand, the dash panel 6 is provided with an integrated expansion valve 5 and a block connector 8 for connecting to other cooling cycle components in the engine room ER. As shown in FIG. 2, the block connector 8 is preferably provided with a packing material 10 made of rubber or the like in a through hole O formed in the dash panel 6, and held while sealing with the packing material 10. . An integral expansion valve 5 is provided between the vehicle interior side end face 8c of the block connector 8 and the joint member 4, and the three members of the block connector 8, the joint member 4 and the integral expansion valve 5 are screwed into a screw member 11. Are linked together. The block connector 8 has an entrance-side passage 8a and an exit-side passage 8b.

Since the integral expansion valve 5 belongs to the public domain, its detailed description is omitted (for example, see Japanese Utility Model Application Laid-Open No. 63-96,918), but the inside of the housing 12 composed of a box-shaped block, An inlet-side flow path 13 through which the refrigerant guided to the evaporator 2 flows, and an outlet-side flow path 14 through which the refrigerant flowing out of the evaporator 2 flows, and a valve 15 that restricts the flow path in the inlet-side flow path 13 are provided. A heat-sensitive portion 16 is provided in the outlet side flow path 14, and the opening degree of the valve 15 is adjusted by the refrigerant flowing through the outlet side flow path 14. The refrigerant inlet-side conduit 3a and the refrigerant outlet-side conduit 3b, the inlet-side passage 8a and the outlet-side passage 8b in the block connector 8, the inlet-side flow path 13 and the outlet-side flow in the integrated expansion valve 4. The road 14 communicates.

Next, the operation of the above embodiment will be described.

When the cooler unit is mounted on a vehicle, the joint member 4 of the first pipe 3 protruding from the unit case 1, the integral expansion valve 5, and the block connector 8 are collectively connected by a screw member 11. connect. In this case, the refrigerant inlet-side conduit 3a and the refrigerant outlet-side conduit 3b of the first pipe 3, the inlet-side flow path 13 and the outlet-side flow path 14 in the integrated expansion valve 4, and the block connector 8 are provided. The entrance-side passage 8a and the exit-side passage 8b communicate with each other so as to correspond to each other.

Then, the block connector 8 is inserted into the packing material 10 provided in the through hole O formed in the dash panel 6 and connected to other cooling cycle components in the engine room ER.

As described above, in the present embodiment in which the connection between the block connector 8 provided on the dash panel 6 and the evaporator 2 can be completed by screwing the single screw member 11, the conventional piping Since the second pipe 7 and the like between the expansion valve 5 and the joint member 4 are not required, the number of parts is reduced accordingly, and excessive force during assembly is applied to the brazing portion between the pipe and the evaporator 2. In addition, the connection work is greatly simplified, the assembly workability is greatly improved, and a reduction in the speed of the production line can be prevented. Further, since the integral type expansion valve 5 is supported by the heat insulating material d, the noise generated from the expansion valve 5 is not transmitted to the vehicle interior.

The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the utility model registration request. For example, in the above-described embodiment, the integral type expansion valve 5 and the block connector 8 are constituted by different parts, but as shown in FIG. 3, the block connector 8 and the housing 12 of the integral expansion valve 5 are integrally formed. May be configured. In this way, the joint member 4 of the first pipe 3 and the block connector 8 integrated with the integral type expansion valve 5 are connected by the screw member 11, so that the connection operation is further performed. This simplifies the assembly and further improves the assembly workability.

[0027]

[Effect of the invention]

 As described above, according to the present invention, the connection work is extremely simple compared to the conventional piping structure, the assembly workability is greatly improved, and a reduction in the speed of the production line can be prevented. In addition, the heat generated from the expansion valve is not transmitted to the vehicle interior by attaching the heat insulating material to the expansion valve storage part.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main part of the embodiment.

FIG. 3 is a schematic explanatory view showing another embodiment of the present invention.

FIG. 4 is a schematic explanatory view showing a piping structure of a conventional automotive air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cooler unit case, 1a ... Expansion valve storage part, 2 ... Evaporator, 3 ... Piping, 3a ... Refrigerant inlet side conduit, 3b ... Refrigerant outlet side conduit, 4 ... Joint member, 5 ... Integrated expansion valve, 6 ... Dash Panel, 8: Block connector, 11: Screw member, CR: Car room, d: Heat insulating material, ER: Engine room, O: Through hole.

Claims (7)

[Utility model registration claims] An evaporator in a cooler unit case (1) mounted inside a dash panel (6) defining a compartment (CR) and an engine compartment (ER) inside the compartment (CR).
(2) and a piping structure of an air conditioner for a vehicle, which is configured to connect another cooling cycle component device in the engine room (ER), wherein the evaporator (2) in the vehicle room (CR) An integral expansion valve connected to the evaporator (2) via a connecting joint member (4) outside the air passage portion.
(5), fixed to the integral type expansion valve (5), the engine room
(ER) provided in the dash panel (6), and a block connector (8) for connecting to another cooling cycle component device provided in the (ER). ) Provided within the block connector
(8) and the through hole (O) are sealed, and the end face of the block connector (8) for connection with the other cooling cycle component device is located on the engine room (ER) side. A piping structure for an automotive air conditioner, which is exposed. 2. A pipe comprising a refrigerant inlet side conduit (3a) and a refrigerant outlet side conduit (3b) connected to the evaporator (2).
The joint member (4) is provided at an end of the pipe (3) extended to the outside of an air passage portion of the evaporator (2), and the integrated expansion valve (5) The piping structure for an air conditioner for a vehicle according to claim 1, wherein the pipe is fixed to the joint member (4). 3. The vehicle according to claim 1, wherein the joint member and the integral expansion valve are arranged in the cooler unit case. Piping structure of air conditioner. 4. The cooler unit case (1) includes:
4. An expansion valve housing (1a) for arranging said joint member (4) and said integral expansion valve (5) is provided. Piping structure of automotive air conditioner. 5. The piping structure of an air conditioner for a vehicle according to claim 4, wherein a heat insulating material (d) is adhered inside said expansion valve housing portion (1a). 6. The joint member is connected to the block connector (8) and the integral expansion valve (5) by a screw member (11).
The piping structure of an air conditioner for a vehicle according to any one of claims 1 to 5, wherein the piping structure is connected to (4). 7. An air conditioner for a vehicle according to claim 1, wherein said block connector (8) is integrally formed with said integral type expansion valve (5). Piping structure.