KR20060104125A - Air conditioner for a car - Google Patents

Abstract

The present invention relates to an air conditioner for automobiles, wherein the air conditioner is equipped with a cooling water temperature sensor that detects the temperature of the cooling water of the heater core, so that air does not leak from the mounting position, and the number of parts and It aims to reduce the labor and improve the work performance and productivity.

To this end, the present invention is equipped with a cooling water temperature sensor having a double injection structure in the insertion hole formed in the heat shield cover surrounding the heater core pipe exposed to the outside surface of the air conditioning case. The cooling water temperature sensor may be integrally formed with the lower housing having a second coupling means in a directional direction so as to be coupled to the first coupling means formed in the inner circumferential surface of the insertion hole when the cooling water temperature sensor is inserted into the insertion hole and rotates in a predetermined direction. A housing main body having an upper housing exposed to the outside from the insertion hole and having a connector formed at an upper end thereof; A thermistor installed inside the lower housing; A terminal piece coupled to an end of a wire connected to the thermistor and connected to the connector side, wherein the housing main body and the assembly of the thermistor, electric wire, and terminal piece provided inside the housing main body are integrally formed by double injection; It is.

Automotive, HVAC, Cooling Water Temperature Sensor, Water Temperature Sensor, Cover, Heat Cut, Heater Core, Pipe, Insertion Hole, Air Leakage, Case, Thermistor, Housing, Double Injection

Description

Air Conditioning System for Cars {Air Conditioner for a Car}

1 is a structural diagram of a conventional cooling water temperature sensor.

2 is a side partial perspective view of an air conditioning case for showing a state where a conventional cooling water temperature sensor is mounted on an air conditioning case of an automotive air conditioner;

3 is a partial cross-sectional view showing a state where a conventional cooling water temperature sensor is fixed by a clamp.

Figure 4 is a schematic perspective view of a vehicle air conditioner equipped with a cooling water temperature sensor according to the present invention.

Figure 5 is a perspective view schematically showing the structure of the insertion hole formed in the heat shield cover of the cooling water temperature sensor and the heater core pipe according to the present invention.

6 is a perspective view illustrating main parts for showing a position where an insertion hole is formed in a heat shield cover of a heater core pipe in FIG. 4.

7 is a schematic cross-sectional view of the state of assembling the cooling water temperature sensor according to the present invention into the insertion hole, as viewed from the inside of the heat shield cover, (a) is a state diagram before assembly, and (b) is a state diagram after assembly.

8 is a mounting cross-sectional view of the cooling water temperature sensor according to the present invention.

** Explanation of symbols for main parts of the drawing **

10: air conditioning case 12a, 12b: pipe

13: heat cover 14: wall

14a: insertion hole 14a1, 14a2: locking portion

20: Cooling water temperature sensor 21: Housing (Housing) body

21a: Lower housing 21a1, 21a2: Guide groove

21a3, 21a4: receiving groove 21a5, 21a6: locking groove

21a7, 21a8: engaging jaw 21b: upper housing

22: Thermistor 23: Wire

24: terminal piece 25: connector

The present invention relates to an air conditioner for automobiles, and more particularly, in mounting a cooling water temperature sensor that detects a temperature of cooling water of a heater core in an air conditioning case, while preventing air from leaking from the mounting position. In addition, the present invention relates to a vehicle air conditioner which can reduce the number of parts and the labor of the work, thereby improving workability and productivity.

BACKGROUND ART In general, automobiles are equipped with an air conditioner for providing a comfortable indoor environment to a passenger even under various weather conditions and driving conditions. Such an air conditioning device selectively heats the air introduced into the air conditioning case by a blower unit having a blower fan through an evaporator through which a refrigerant flows or a heater core through which a coolant of a vehicle engine flows. Afterwards, the device is configured to cool and heat the interior of the vehicle by distributing it in various directions of the interior of the vehicle in a cold or warm state through a vent communicating with each air outlet in the vehicle interior.

Furthermore, the air conditioner as described above is provided with a thermostat (FATC) as a means for optimally adjusting the car interior temperature according to the temperature change in the car interior and exterior. The thermostat receives input signals such as various sensors and control switches for detecting the inside temperature, the outside temperature, the evaporator, the water temperature of the heater core, and the like through a logical operation in Micom. By controlling various module motors (mode door motor, temp door motor, internal and external door motor), the indoor temperature is maintained at the set temperature of the driver.

Here, a sensor for detecting the water temperature of the heater core (hereinafter referred to as a 'cooling water temperature sensor') is installed on the outer surface of the heater core to detect the coolant temperature in the heater core by sensing the outer surface temperature of the heater core. will be.

1 shows the structure of a conventional cooling water temperature sensor.

As shown in FIG. 1, the conventional cooling water temperature sensor 100 includes a housing 101 contacting an outer surface of a heater core and a housing 101 that is embedded in the housing 101. A thermistor 102 having a resistance value changed according to a temperature received from the wire, a wire 103 connected to the thermistor 102 and partially surrounded by an insulating tube 104, and of the wire 103 A connector (106) electrically connected to a control device (not shown) of the thermostat by a terminal piece (105) coupled to an end and an air conditioning case (200) integrally formed on the connector (106) side. 2, a clip 107 fixed to an outer predetermined portion of the frame.

The housing 101 is open at the top and filled with an epoxy resin 108 for molding, and a portion where the wire 103 and the thermistor 101 are connected by an epoxy resin 109 for coating. It is fixed

That is, the cooling water temperature sensor inserts the thermistor 102 connected to one end of the electric wire 103 fixed by the epoxy resin 109 for coating in the housing 101 filled with the molding epoxy resin 108. After that, it is made by applying heat to the housing 101 to cure the molding epoxy resin 108.

Cooling water temperature sensor 100 having such a structure, as shown in Figures 2 and 3, is cut out on the lower side of the air conditioning case 200, the heater core 201 is built, the heater core 201 It is arranged so as to contact the outer surface of the tank portion 201a of the heater core 201 through the sensor insertion space 200a protruding in a box shape on the side of the portion facing the outer surface of the tank portion 201a of the heater core 201a. , And is fixedly mounted by a separate clamp 210 inserted between the air conditioning case 200 and the heater core tank 201a.

As shown in FIG. 3, the clamp 210 includes a substantially straight main body 211, a fixing piece 212 formed at a lengthwise end of the main body 211, and the main body 211. It consists of the several press piece 213 which protrudes inclined toward the tank part 201a side of the heater core 201. The clamp 210 has a lower surface of the housing 101 and the air conditioning case 200 of the cooling water temperature sensor 100 located on the outer surface of the tank 201a of the heater core 201 embedded in the air conditioning case 200. The upper surface of the main body 211 is in close contact with the lower surface of the air conditioning case 200, and the housing 101 of the coolant temperature sensor 100 is moved out of the tank portion 201a by a plurality of pressing pieces 213. The housing 101 of the cooling water temperature sensor 100 is fixed by being pressed to the surface side and narrowed to the lower surface of the air conditioning case 200 in which the sensor insertion space 200a is formed.

Thus, the cooling water temperature sensor 100, only one end thereof is fixed by the clamp 210, the other end, as shown in Figure 2 in the state exposed to the outside from the sensor insertion space (200a) The outer surface of the air conditioning case 200 is fixed by the clip 107.

However, the conventional cooling water temperature sensor 100, the insulating tube 103 for protecting the epoxy resin (108, 109) and the wire 103 exposed to the outside of the air conditioning case to fix the thermistor (102) In addition, since the wire 103 must also be formed long, the number of parts is increased, resulting in a cost increase.

In particular, in installing the cooling water temperature sensor 100 in the air conditioning case 200, the thermistor 102 is inserted into the sensor insertion space 200a formed at the bottom of the air conditioning case 200, and then the clamp 210 is inserted into the clamp 210. Since it must be fixed separately, the installation work is cumbersome, and there is a problem in that work efficiency and productivity are deteriorated due to the increase of the labor.

Furthermore, by separately cutting the sensor insertion space 200a for installing the cooling water temperature sensor 100 in the lower part of the air conditioning case 200, air leaks to the outside through the sensor insertion space 200a, thereby providing air conditioning performance. There was a problem of lowering.

On the other hand, in order to prevent such air leakage phenomenon may be provided with a separate sealing member (not shown) in the sensor insertion space (200a), in this case will cause a cost increase.

Accordingly, the present invention has been made to solve the above-mentioned problems, and in mounting the cooling water temperature sensor for detecting the temperature of the cooling water of the heater core in the air conditioning case, air does not leak from the mounting position. In addition, it aims at reducing the number of parts and the number of labors so as to improve workability and productivity.

In order to achieve the above object, the present invention, the air inlet formed in one inlet end, and the air conditioning case having a plurality of air outlet formed in the other outlet end;

An evaporator and a heater core for heat-exchanging air introduced through the air inlet;

A heat shield cover fixed to an outer wall of the air conditioning case and surrounding the heater core pipe exposed to the outer surface of the air conditioning case;

It is formed in an open state to the inside of the heat shield cover through the central portion of the cylindrical wall protruding to a predetermined portion of the heat shield cover so that any one of the heater core pipe is exposed, the first direction of directional on the inner peripheral surface Insertion hole is formed with a coupling means;

A lower housing having a thermistor therein and having a second coupling means coupled to the first coupling means on an outer circumferential surface thereof so as to be inserted into the insertion hole and rotated in a predetermined direction so that the bottom surface contacts and is fixed to one of the pipes And a housing main body which is bent in one direction from an upper surface of the lower housing so as to be perpendicular to the lower housing and has a connector formed at an end thereof, and coupled to an end of a wire connected to the thermistor in the housing main body. A cooling water temperature sensor including a terminal piece connected to the connector side and integrally formed with the housing body and the assembly of the thermistor, electric wire, and terminal piece by double injection;

Characterized in that it comprises a.

In addition, in the present invention, the first coupling means and the second coupling means, respectively, in the first and second engaging portions protruding in the mutually staggered direction, or in the first and second guide grooves of the asymmetric structure formed in the circumferential direction It characterized in that any one of the first and second engaging grooves formed to a predetermined depth, respectively, at the distal end of the first guide groove and the distal end of the second guide groove.

In addition, in the present invention, each of the first and second locking portions and the formed position angles θ of the first and second locking grooves is 90 ° to 180 °.

In the present invention, the first and second locking portions and the first and second locking grooves are hemispherical.

In the present invention, the first and second guide grooves are characterized in that both ends thereof are not connected to each other.

In addition, in the present invention, the lower housing is formed in a substantially cylindrical shape, the lower surface is formed in an arc-shaped structure curved toward the upper housing so that the lower surface is in close contact with the outer surface of any one of the pipes. do.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

4 is a schematic perspective view of a vehicle air conditioner equipped with a cooling water temperature sensor according to the present invention, Figure 5 is a schematic view showing the structure of the insertion hole formed in the heat shield cover of the cooling water temperature sensor and the heater core pipe according to the present invention. 6 is a perspective view illustrating a main part for showing a position where an insertion hole is formed in a heat shield cover of the heater core pipe of FIG. 4.

The automotive air conditioner for applying the cooling water temperature sensor according to the present invention is a semi-center mounting type air conditioner in which an evaporator and a heater core are integrally formed in one air conditioner case. It is not limited to the air conditioning apparatus.

Figure 4 shows the air conditioning case of the air conditioner as seen from the rear side. Although not shown in FIG. 4, the air conditioner case 10 according to the present invention is formed at an air inlet connected to a blower duct of a blower unit for introducing air into and out of a vehicle at an inlet end and an outlet end respectively. Evaporator 11 and heater core 12 having a plurality of air discharge ports (10a, 10b, 10c) for discharging air into the room, the heat exchanger to selectively heat exchange the air introduced through the air inlet therein Has a structure that includes. Furthermore, although shown in the figure, inside the air-conditioning case 10, as in the conventional structure, the temperature of the air introduced from the air inlet between the evaporator 11 and the heater core 12 and selectively heat-exchanged is controlled. Temporary doors and a plurality of blowing mode doors for selectively changing the flow direction of the air discharged through the air discharge ports 10a, 10b, 10c according to the opening angle of the temporal door ( Mode Door) is provided.

In the air conditioner having such a structure, the present invention is equipped with a cooling water temperature sensor for detecting the temperature of the cooling water inside the heater core at a position where the air inside the air conditioning case does not leak to the outside, the number of parts and work It is characterized in that it is possible to quickly assemble in a more convenient way to the mounting position.

In general, the heater core 12, two pipes (12a, 12b) for the inlet and outlet of the cooling water as the working fluid is connected to the upper and lower tanks (not shown) of the heater core 12, respectively, The pipes 12a and 12b are drawn out to the outside of the air conditioning case 10 in a constant shape and length so as to be connected to an engine seated at a predetermined position in the vehicle engine room.

However, since the pipes 12a and 12b are exposed to a position where they can be in contact with the driver's feet, there is a risk of causing burns to the driver when the feet of the driver come into contact with the pipes 12a and 12b. Therefore, it is preferable to separately install a heat shield cover 13 having a predetermined thickness surrounding the pipes 12a and 12b for heat shielding from the outside. The heat shield cover 13 is not shown in the drawing, but is attached to the pipes 12a and 12b in a plurality of clips of substantially 'C' shape attached to the inner surface at predetermined intervals so as to support the outer circumferential surface of each pipe. It is fixedly fitted.

The present invention is a coolant temperature sensor 20 for detecting the temperature of the coolant by contact with the outer surface of the pipe (12a, 12b) through the insertion hole (14a) formed in a predetermined portion of the heat shield cover (13) It is equipped with.

First, before explaining the structure of the cooling water temperature sensor 20, the structure of the insertion hole (14a) that is the site where the cooling water temperature sensor 20 is assembled and fixed.

As shown in FIGS. 5 and 6, the insertion hole 14a has a cylindrical shape protruding from a predetermined portion of the heat shield cover 13 so that any one of the heater core pipes 12a and 12b is exposed. It is formed to be open to the inside of the heat shield cover 13 through the center of the wall (14). In addition, a first coupling means having a directivity is formed on an inner circumferential surface of the insertion hole 14a so as to be coupled to a second coupling means described later.

As illustrated in the drawing, the first coupling means includes first and second locking parts 14a1 and 14a2 that protrude in a hemispherical shape at staggered positions. The position angle θ of formation of the first locking portion 14a1 and the second locking portion 14a2 is approximately 90 ° to 180 °, and preferably 150 °. In Fig. 6, the insertion hole 14a is formed in the pipe 12a into which the coolant flows into the upper tank of the heater core.

The cooling water temperature sensor 20 mounted through the insertion hole 14a having such a structure has a housing main body 21, a thermistor 22, an electric wire 23, and a terminal piece 24, as shown in FIG. 5. ).

The cooling water temperature sensor 20 is formed by molding the components of the thermistor 22, the electric wire 23, and the terminal piece 24 as a plastic resin to form a single assembly, and then the housing body 21 ) And a double injection structure formed integrally by secondary injection molding.

In this case, when the cooling water temperature sensor 20 is formed of a double injection structure, an epoxy resin for fixing the thermistor 22 and an insulating tube covering the wire are not required. Therefore, the number of parts can be reduced as a whole, thereby reducing manufacturing costs. Not only can it, the number of work is also greatly reduced according to the reduction of the number of parts, there is an advantage to improve the work efficiency.

Here, the housing main body 21 is formed integrally with the lower housing 21a and the upper surface of the lower housing 21a and bent vertically with the lower housing 21a to protrude a predetermined length in a horizontal direction. It has a substantially '-' shaped structure with a housing 21b. A connector 25 is formed at the end of the upper housing 21b to be connected to the terminal piece 24 and electrically connected to an external control device (not shown).

The lower housing 21a has a substantially cylindrical structure having a length and an outer diameter substantially corresponding to the length and inner diameter of the insertion hole 14a so as to be inserted into and fixed to the insertion hole 14a. 12b) performs a function of a temperature sensing unit which is in surface contact with the outer surface of any one pipe (see FIG. 7) to receive the temperature of the coolant flowing inside the pipe. On the other hand, the upper housing 21b is arranged to be exposed to the outside from the insertion hole (13a) to perform the function of electrically connecting between the connector 25 formed at its end and the external control device. . In particular, the lower surface 21a1 of the lower housing 21a corresponds to the outer surface shape of the pipes 12a and 12b as shown in FIG. 5 so as to be in close contact with the outer surfaces of the pipes 12a and 12b. It has a shape. That is, the lower end surface of the lower housing 21a has an arc-shaped structure that is curved toward the upper housing 21b side.

The thermistor 22 is installed inside the lower housing 21a to sense the temperature transmitted from the outer surfaces of the heater core pipes 12a and 12b to the surface of the lower housing 21a. Accordingly, the thermistor 22 detects the temperature of the lower housing 21a and uses the wire 23 and the terminal piece 24 coupled to the ends of the thermistor 22 to change the resistance value according to the temperature change. It is quickly delivered to the external control device connected to the connector 25 through.

Meanwhile, as shown in FIGS. 5 and 7, the lower housing 21a is provided with second coupling means having directivity to be coupled to the first coupling means.

The second coupling means, the first and second guide grooves (21a1, 21a2) of the asymmetrical structure in the circumferential direction relative to one side of the lower housing (21a) connected to the bottom of the upper housing (21b), respectively Formed.

When the first and second guide grooves 21a1 and 21a2 are rotated after the lower housing 21a is inserted into the insertion hole 14a of the heat shield cover 13, as described later, As the housing 21a is rotated, the first and second locking parts 14a1 and 14a2 fixed to the insertion hole 14a are formed to pass through the housing 21a. However, as shown in FIG. 7, the first and second guide grooves 21a1 and 21a2 have a structure in which both ends are not connected to each other in order to limit continuous rotation of the lower housing 21a.

As shown in detail in FIG. 7, the first and second guide grooves 21a1 and 21a2 having such a function are formed at the distal end of the first guide groove 21a1 in the insertion hole 14a. A first accommodating groove 21a3 is formed to accommodate the first catching portion 14a1, and a second catching portion 14a2 formed in the insertion hole 14a is accommodated at the distal end of the second guide groove 21a2. The second accommodating groove 21a4 is formed.

The forming angle of the first accommodating groove 21a3 and the second accommodating groove 21a4 is 90 ° to 180 ° similarly to the formation positions of the first catching portion 14a1 and the second catching portion 14a2. And preferably 150 °.

In addition, the first and second receiving grooves 21a3 and 21a4 respectively insert the first and second locking portions 14a1 and 14a2 when the lower housing 21a is initially inserted into the insertion hole 14a. It extends from the end of each of the receiving grooves (21a3, 21a4) to the end surface of the lower housing (21a) to accommodate, the extended portion is in the shape of the first and second locking portions (14a1, 14a2) In the corresponding shape.

In addition, a distal end portion of the first guide groove 21a1 and a distal end portion of the second guide groove 21a2 may be caught in a state in which the hemispherical first and second locking portions 14a1 and 14a2 are accommodated. The first and second locking grooves 21a5 and 21a6 are formed, respectively.

The first and second locking grooves 21a5 and 21a6 are formed in the angular range of positions staggered with each other similarly to the positions of formation of the first and second receiving grooves 45a and 45b.

Referring to FIG. 7A, the first and second locking grooves 21a5 and 21a6 have deeper structures than the first and second receiving grooves 21a3 and 21a4, respectively.

Further, the first guide groove 21a1 is narrower from the first receiving groove 21a3 formed at the distal end toward the first locking groove 21a5 formed at the distal end thereof, and the second guide groove 21a2 is provided. ) Has a structure in which the width becomes narrower from the second receiving groove 21a4 formed at the distal end toward the second locking groove 21a6 formed at the distal end.

The first and second locking grooves 21a5 and 21a6 deeper than the groove depths of the first and second receiving grooves 21a3 and 21a4 are formed on a portion of the guide groove that is narrowed as described above, whereby the width is increased. The first and second locking jaws 21a7 and 21a8 having a stepped structure are formed at portions where the narrow guide groove and the first and second locking grooves 21a5 and 21a6 continue.

Meanwhile, in place of the first coupling means, the second coupling means having the above-described structure may be formed in the insertion hole 14a. Correspondingly, the second coupling means formed in the lower housing 21a of the cooling water temperature sensor 20 may be replaced by the first coupling means.

Hereinafter, a method of assembling the cooling water temperature sensor 20 according to the present invention will be described in detail with reference to FIG. 7.

First, as shown in FIG. 7A, the cooling water temperature sensor 20 is gripped so that the connector 25 of the cooling water temperature sensor 20 faces upward.

After determining the initial insertion direction of the coolant temperature sensor 20 as above, the lower housing 21a is pushed into the insertion hole 14a.

In this case, the first and second locking portions 14a1 and 14a2 that are alternately formed in the insertion hole 14a are first and second formed in the lower housing 21a as illustrated in FIG. 7A. Since the initial assembly position of the coolant temperature sensor 20 is determined while being naturally accommodated in the receiving grooves 21a3 and 21a4, the operator does not inadvertently assemble the coolant temperature sensor 20 inadvertently.

Subsequently, when the connector 25 is rotated in the direction of the arrow (as shown in cross-sectional view in FIGS. 7 (a) and 7 (b), it is shown counterclockwise but is actually clockwise), the lower housing The first and second guide grooves 21a1 and 21a2 formed at 21a rotate while passing through the first and second locking portions 14a1 and 14a2, respectively.

When the rotation angle reaches about 90 °, as shown in FIG. 7B, the first and second locking grooves 21a5 and 21a6 formed in the first and second guide grooves 21a1 and 21a2. ) Is received by the first and second locking portions 14a1 and 14a2, respectively, and then is caught by the locking jaws 21a7 and 21a8 of the first and second locking grooves 21a5 and 21a6. Fully secured without deviation.

As such, when the cooling water temperature sensor 20 is mounted on the outside of the air conditioning case 10, the air leakage phenomenon caused by installing the cooling water temperature sensor inside the air conditioning case as in the prior art may be fundamentally prevented. In addition to being able to be mounted on the outside of the air conditioning case, the workability can be improved by shortening the working time. In particular, by greatly omitting the number of parts (for example, epoxy resin, insulating tube, clip, etc.) constituting the cooling water temperature sensor, it is possible to greatly improve productivity due to cost reduction and to reduce the number of parts. As a result, the number of labors is greatly reduced, and the overall work efficiency and productivity can be greatly improved.

As described above, according to the present invention, by omitting components such as the epoxy resin and the insulating tube constituting the cooling water temperature sensor, the housing body and thermistor are formed by double injection molding, thereby reducing the cost according to the reduced number of parts. The reduction can greatly improve productivity.

In addition, according to the present invention, by installing the cooling water temperature sensor on the heater core pipe heat shield cover side provided outside the air conditioning case, by forming the cooling water temperature sensor in the insertion space formed by separately cutting the lower end of the air conditioning case as in the prior art Air leakage phenomenon caused by this can be fundamentally prevented, and in particular, it can be installed more easily and easily on the outside of the air-conditioning case in a state where the work labor is also greatly reduced according to the reduction of the number of parts, thereby improving overall workability and productivity. Can be planned.

Although the present invention has been described with respect to the preferred embodiment, the present invention is not limited thereto, and various modifications and applications will be possible to those skilled in the art without departing from the gist of the present invention.

Claims (6)

An air inlet case 10 formed at one inlet end and a plurality of air outlets formed at the other outlet end; An evaporator (11) and a heater core (Heater Core) 12 for selectively heat-exchanging air introduced through the air inlet; A heat shield cover (Cover, 13) which is fixedly installed on an outer wall of the air conditioning case 10 and surrounds two heater core pipes (Pipe, 12a, 12b) exposed to the outer surface of the air conditioning case 10; To the inside of the heat shield cover 13 through the center of the cylindrical wall 14 protruding to a predetermined portion of the heat shield cover 13 so that any one of the heater core pipes 12a and 12b is exposed. An insertion hole 14a formed in an open state and having a first directional coupling means formed on an inner circumferential surface thereof; Inserted into the insertion hole (14a) is provided with a directional second coupling means coupled to the first coupling means on the outer circumferential surface so that the lower surface is fixed while contacting any one of the pipes when rotated in a predetermined direction A lower housing (21a) having a thermistor (22), and bent in one direction from an upper surface of the lower housing (21a) to be perpendicular to the lower housing (21a), and at the end a connector (25) A housing body 21 formed of an upper housing 21b formed therein, and a terminal piece 24 coupled to an end of a wire 23 connected to the thermistor 22 inside the housing body 21 and connected to the connector 25 side; A cooling water temperature sensor 20 having a structure in which the housing body 21, the thermistor 22, the electric wire 23, and the assembly of the terminal piece 24 are integrally formed by double injection; Automotive air conditioning apparatus comprising a. The method of claim 1, Each of the first coupling means and the second coupling means may include first and second locking portions 14a1 and 14a2 protruding from each other in a staggered direction, or first and second guide grooves 42a having an asymmetric structure formed in a circumferential direction. 42b), the distal end of the first guide groove (21a1) and the front end of the second guide groove (21a2) is one of the first and second locking groove (21a5, 21a6) formed to a predetermined depth, respectively. Automotive air conditioning system. The method of claim 2, Each of the forming position angles θ of the first and second locking portions 14a1 and 14a2 and the first and second locking grooves 21a5 and 21a6 is 90 ° to 180 °. Device. The method according to claim 2 or 3,  The first and second locking portions (14a1, 14a2) and the first and second locking grooves (21a5, 21a6) is a hemispherical shape, characterized in that the vehicle. The method of claim 2, The first and second guide grooves (21a1, 21a2), the air conditioner for a vehicle, characterized in that both ends are not connected to each other. The method of claim 1, The lower housing 21a has a substantially cylindrical shape and is formed in an arc-shaped structure that is curved toward the upper housing 21b such that the lower end surface 21c is in close contact with the outer surface of the any one pipe. Automotive air conditioner characterized in that.

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