JP2009179169A - Air conditioning device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning device for a vehicle, capable of improving assembling performance in connecting engine room side piping to cabin side piping. <P>SOLUTION: The air conditioning device for a vehicle is disposed in a cabin 101, and comprises: an air-conditioning unit 10 to regulate temperature of air flowing inside to generate air conditioning air; a blow unit 30 to switch and introduce air inside and outside the cabin 101 to generate flow of air toward the air-conditioning unit 10; cabin side cooling medium piping 22 extended from the air conditioning unit 10 through an interval 35 between the air conditioning unit 10 and a blow unit 30 toward an engine room 102 outside the cabin 101; and a stopper part 70 integrally molded with an outer wall of the blow unit 30 to project toward the interval 35 to regulate flexure of the cabin side cooling medium piping 22 by supporting the piping 22 when force from the engine room 102 toward the cabin 101 is added to the cabin side cooling medium 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner that performs air conditioning in a vehicle interior.

Patent Document 1 discloses a vehicle compartment side pipe having one end connected to an air conditioning unit of a vehicle air conditioner disposed in a vehicle interior and the other end extending toward the engine room. When the air conditioning unit is mounted in the passenger compartment, the tip of the passenger compartment side pipe is inserted into a through-hole formed in a dash panel that partitions the passenger compartment and the engine compartment. After the air conditioning unit is attached, an engine room side pipe disposed in the engine room is connected to the tip portion.
JP 2007-203938 A

  When connecting the passenger compartment side pipe and the engine compartment side pipe, the pressure from the engine compartment side to the passenger compartment side is applied to the tip of the other end side of the passenger compartment side pipe and pushed backward. May end up. Only one end side of the cabin side piping is fixed to the air conditioning unit, so if the other end side is pushed backward, the cabin side piping will be bent or bent, and when connecting the engine room side piping There arises a problem that the assemblability deteriorates. In particular, when the length of the passenger compartment side pipe is long, or when the passenger compartment side pipe is bent and provided, the above problem becomes significant.

  The objective of this invention is providing the vehicle air conditioner which can improve the assembly | attachment property at the time of connecting engine room side piping and vehicle interior side piping.

  In order to achieve the above object, the present invention employs the following technical means.

  Invention of Claim 1 is a vehicle air conditioner arrange | positioned in a vehicle interior (101), Comprising: The air conditioning unit (10) which adjusts the temperature of the air which distribute | circulates inside, and produces | generates conditioned air, A blower unit (30) that is offset with respect to the air conditioning unit (10) and switches between the inside air in the passenger compartment (101) and the outside air outside the passenger compartment (101) to generate an air flow toward the air conditioning unit (10). And a pipe (22) extending from the air conditioning unit (10) to the engine room (102) side outside the passenger compartment (101) via a gap (35) between the air conditioning unit (10) and the blower unit (30). ) And the outer wall of the blower unit (30) are integrally formed, project toward the gap (35), and are applied to the pipe (22) from the engine room (102) toward the vehicle compartment (101). Pipe (2 ) Is a vehicle air-conditioning system, characterized in that it comprises a stopper portion for deflection regulating the support to the pipe (22) (70) a.

  As a result, when a force directed from the engine room (102) side toward the vehicle compartment (101) side is applied to the pipe (22), the bending of the pipe (22) is regulated by the stopper portion (70). The assembling property when connecting the piping on the room (102) side to the piping (22) can be improved. Moreover, since the stopper part (70) is shape | molded integrally with the outer wall of the ventilation unit (30), the increase in a number of parts and a manufacturing process can be suppressed.

  According to the second aspect of the present invention, the stopper portion (70) includes a first stopper surface (74) facing the engine room (102) side and a second stopper surface (facing the gap portion (35) side). 75).

  Thereby, the bending of the pipe (22) due to the force from the engine room (102) toward the passenger compartment (101) is restricted, and the escape of the pipe (22) to the blower unit (30) can be prevented.

  The invention according to claim 3 is characterized in that the stopper portion (70) has a structure in which the first stopper surface (74) protrudes from the second stopper surface (75). Thereby, the structure of a stopper part (70) can be simplified.

  According to a fourth aspect of the present invention, the pipe (22) is bent at at least one bending point, and the stopper (70) is located near the tip of the pipe (22) with respect to the pipe (22). When a force parallel to the extending direction is applied, the pipe (22) is provided so as to support the vicinity of the bending point (22a) closest to the tip.

  Thereby, since the stress which arises in piping (22) turns into a compressive stress parallel to an extending | stretching direction, the bending of piping (22) can be controlled effectively.

  According to a fifth aspect of the present invention, the blower unit (30) includes an inside / outside air switching door (43) for switching and introducing inside air and outside air, and the stopper portion (70) is viewed from the air conditioning unit (10) side. The inside / outside air switching door (43) is provided at a position away from the sealing surface with which the sealing member abuts.

  Thereby, even if a relatively strong force is applied to the stopper portion (70) and the outer wall of the blower unit (30) is deformed, the seal surface can be prevented from being deformed. Can be maintained.

  As in the sixth aspect of the present invention, the blower unit (30) includes an inside / outside air switching door (43) for switching and introducing inside air and outside air, and the stopper portion (70) includes the inside / outside air switching door (43). ) May be provided closer to the engine room (102) than the rotating shaft (43a).

  In addition, the code | symbol in the bracket | parenthesis of each said means has shown an example of the corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing a configuration of a vehicle air conditioner 1 according to the present embodiment as viewed from the engine room side (front of the vehicle). The vertical direction in FIG. 1 generally represents the vertical vertical direction. FIG. 2 is a top view showing a configuration of the vehicle air conditioner 1 as viewed from substantially vertically above. The vertical direction in FIG. 2 generally represents the vehicle front-rear direction, and the upper direction represents the engine room side (vehicle front). As shown in FIGS. 1 and 2, the vehicle air conditioner 1 includes an air conditioning unit 10 and a blower unit 30. The air conditioning unit 10 and the air blowing unit 30 are both provided in the lower part of the instrument panel in the vehicle interior. The air conditioning unit 10 is disposed at a substantially central portion in the left-right direction of the vehicle, and the blower unit 30 is offset from the air conditioning unit 10 on the passenger seat side, for example. That is, the air conditioning unit 10 and the air blowing unit 30 are arranged in parallel in the vehicle left-right direction.

  The blower unit 30 includes an inside / outside air switching box 40 that switches between air inside the vehicle compartment (inside air) and air outside the vehicle compartment (outside air). The blower unit 30 includes a centrifugal fan (not shown) that generates an air flow in the introduced air, a spiral scroll case 50 that houses the centrifugal fan, and a drive motor that rotationally drives the centrifugal fan ( (Not shown). The outer wall of the blower unit 30 is mainly configured by, for example, an inside / outside air switching box 40 and a scroll case 50 each made of a resin molded product. The air outlet of the scroll case 50 is connected to the air conditioning unit 10.

  The air conditioning unit 10 is made of, for example, a resin molded product, and includes an air conditioning case 20 that forms an air passage therein. The air conditioning case 20 is connected to the outlet of the scroll case 50 and has an opening for introducing air from the air blowing unit 30 side. An evaporator that cools the conditioned air by heat exchange with the refrigerant is disposed in the air passage in the air conditioning case 20. The evaporator constitutes a part of the refrigeration cycle in which the refrigerant circulates. On the downstream side of the air flow from the evaporator, a heater core that heats conditioned air by heat exchange with engine cooling water that circulates through the cooling water pipes 15 and 16, and a bypass passage that circulates the conditioned air bypassing the heater core And an air mix door that adjusts the flow rate of the air passing through the heater core and the air passing through the bypass passage to control the temperature of the conditioned air.

  The evaporator in the air conditioning case 20 is connected to a vehicle compartment side refrigerant pipe 21 through which the refrigerant flows into the evaporator and a vehicle compartment side refrigerant pipe 22 through which the refrigerant flows out of the evaporator via the connector portion 23. Yes. The passenger compartment side refrigerant pipe 22 has a larger diameter than the passenger compartment side refrigerant pipe 21. The vehicle compartment side refrigerant pipes 21 and 22 extend to the engine room side where the compressor and the condenser are arranged via a gap 35 between the air conditioning unit 10 and the blower unit 30. An expansion valve 60 is disposed at a portion where the passenger compartment refrigerant pipes 21 and 22 are connected to the engine compartment refrigerant pipe extending from the compressor and the condenser toward the passenger compartment. The expansion valve 60 is exposed to the engine room side through a through hole 103 described later. A connector portion 65 to which an engine room side refrigerant pipe is connected is attached to the surface of the expansion valve 60 on the engine room side. Around the expansion valve 60, a cover 63 that partitions the vehicle compartment and the engine room together with the dash panel is provided. On the contact surface of the cover 63 with respect to the dash panel, a packing 64 is attached in an annular shape surrounding the through hole 103 so as to be in close contact with the dash panel and ensure airtightness.

  FIG. 3 is a schematic diagram illustrating a configuration in which the inside / outside air switching box 40 and the passenger compartment side refrigerant pipes 21 and 22 are viewed from the air conditioning unit 10 side. As shown in FIG. 3, the inside / outside air switching box 40 has a resin case 45. Above the case 45, an outside air inlet 41 for sucking outside air and an inside air inlet 42 for sucking inside air are formed. Below the case 45 is formed an air outlet 44 that is connected to the opening of the scroll case 50 and supplies the outside air sucked from the outside air inlet 41 or the inside air sucked from the inside air inlet 42 into the scroll case 50. . Further, the inside / outside air switching box 40 has a rotary type inside / outside air switching door 43 that rotates with respect to the case 45 about the rotation shaft 43a and opens and closes the outside air inlet 41 and the inside air inlet 42. Inside the inside / outside air switching box 40, there are a seal surface with which the seal member of the inside / outside air switching door 43 abuts when the inside air inlet 42 is closed, and a seal of the inside / outside air switching door 43 when the outside air inlet 41 is closed. A seal surface with which the member abuts is formed. These sealing surfaces are formed in a U-shape and are located at the A1 and A2 portions when viewed from the air conditioning unit 10 side.

  The vehicle compartment side refrigerant pipes 21 and 22 extend toward the engine room 102 along the side surface of the inside / outside air switching box 40 on the gap 35 side. The front ends of the passenger compartment side refrigerant pipes 21 and 22 are connected to the expansion valve 60 via a connector part 62. The expansion valve 60 is disposed in the vicinity of the through-hole 103 formed in the dash panel 100 that partitions the compartment 101 and the engine room 102.

  Each of the compartment side refrigerant pipes 21 and 22 is bent at a plurality of bending points. The vehicle interior side refrigerant pipes 21 and 22 extend to the vehicle rear side substantially perpendicular to the dash panel 100 at the tip portion in the vicinity of the expansion valve 60, and are substantially parallel to the dash panel 100 at bending points 21a and 22a closest to the tip portion. Each of them is bent downward.

  On the outside of the case 45 of the inside / outside air switching box 40, there is formed a stopper portion 70 which is integrally formed with the case 45 and protrudes toward the gap portion 35 side. The stopper part 70 is provided in the position away from the A1 part and A2 part in which a sealing surface is formed among the outer wall surfaces at the side of the gap part 35 of the inside / outside air switching box 40. Moreover, the stopper part 70 is provided in the engine room 102 side rather than the rotating shaft 43a.

  FIG. 4 is a cross-sectional view illustrating the configuration of the stopper portion 70 and the vehicle compartment side refrigerant pipe 22 cut along line IV-IV in FIG. 3. As shown in FIG. 4, the stopper portion 70 has a flat plate portion 71 that protrudes substantially vertically from the case 45 and has a surface facing the engine room 102 side. The stopper portion 70 has a plurality of plate-like ribs 72 a to 72 d and 73 a to 73 d that protrude substantially perpendicularly from the case 45 and intersect the plate portion 71. The ribs 72a to 72d and 73a to 73d extend in a direction intersecting with the extending direction (tube axis) of the vehicle compartment side refrigerant pipe 22 when viewed from the air conditioning unit 10 side.

  The ribs 72a to 72d formed on the engine room 102 side with respect to the flat plate portion 71 have upper surface portions that are lower than the flat plate portion 71 in height from the outer wall surface of the case 45 and substantially the same height. Have. On the other hand, the ribs 73 a to 73 d formed on the vehicle rear side from the flat plate portion 71 have substantially the same height as the flat plate portion 71.

  Of the surface on the engine room 102 side of the flat plate portion 71, a portion having a height higher than the upper surface portions of the ribs 72 a to 72 d constitutes a first stopper surface 74. The stopper surface 74 is applied with a force toward the vehicle rear side with respect to the tip end portion (the expansion valve 60 in this example) of the passenger compartment refrigerant pipe 22 (in FIG. 3, the direction of the force is indicated by a white thick arrow). In this case, the bending of the compartment side refrigerant pipe 22 toward the vehicle rear side is regulated by supporting the evaporator side portion in the vicinity of the bending point 22a of the compartment side refrigerant pipe 22.

  Each upper surface portion of the ribs 72a to 72d constitutes a second stopper surface 75 facing the gap portion 35 side. The stopper surface 75 mainly restricts the escape of the vehicle compartment side refrigerant pipe 22 to the blower unit 30 side, which is caused by the deflection of the stopper surface 74 being restricted.

  As described above, the stopper portion 70 has a structure in which the stopper surface 74 protrudes closer to the gap portion 35 than the stopper surface 75. The stopper surface 74 and the stopper surface 75 are connected continuously and relatively smoothly by the curved surfaces 76 of the ribs 72a to 72d. The curved surface 76 is formed to have a curvature that is substantially the same as or smaller than the curvature of the outer peripheral surface of the passenger compartment side refrigerant pipe 22, for example, and also functions as a stopper surface that regulates the deflection and escape of the passenger compartment side refrigerant pipe 22. .

  At the stage where the vehicle air conditioner 1 is mounted in the passenger compartment 101, the front end sides of the passenger compartment side refrigerant pipes 21 and 22 are fixed to each other via the expansion valve 60. Is in an unfixed state. Thereafter, in the process of connecting the engine room side refrigerant pipe to the expansion valve 60, a force toward the vehicle rear side may be applied to the expansion valve 60 and the front end portions of the vehicle compartment side refrigerant pipes 21 and 22.

  In the present embodiment, even when a force toward the vehicle rear side is applied to the vehicle compartment side refrigerant pipe 22, the stopper portion 70 restricts the bending of the vehicle compartment side refrigerant pipe 22. Moreover, since the front end side of the compartment side refrigerant | coolant piping 21 and 22 is mutually fixed via the expansion valve 60, when the deflection | deviation of the compartment side refrigerant | coolant piping 22 is controlled, bending of the compartment side refrigerant | coolant piping 21 is also carried out. It is supposed to be suppressed. Therefore, it is possible to improve the assembling property when connecting the engine room side refrigerant pipe and the passenger compartment side refrigerant pipes 21 and 22.

  Moreover, in this embodiment, the stopper part 70 is integrally molded with the case 45 of the inside / outside air switching box 40, and the compartment side refrigerant pipes 21, 22 are connected to the inside / outside air switching box using another part such as a bracket. Since it is not necessary to fix to 40, the increase in a number of parts and a manufacturing process is suppressed.

  Furthermore, in this embodiment, in addition to the stopper surface 74 that restricts the bending of the passenger compartment side refrigerant pipe 22 toward the vehicle rear side, the stopper surface 75 that restricts the bending of the passenger compartment side refrigerant pipe 22 toward the air blowing unit 30 is provided. Is formed. Therefore, not only the deflection of the vehicle compartment side refrigerant pipe 22 toward the vehicle rear side but also the deflection toward the vehicle rear side of the vehicle compartment side refrigerant tube 22 can be prevented from escaping to the blower unit 30 side.

  In the present embodiment, the stopper portion 70 includes the flat plate portion 71 and a plurality of flat plate-like ribs 72 a to 72 d and 73 a to 73 d that intersect the flat plate portion 71. Thereby, the flat plate part 71 in which the stopper surface 74 is formed is reinforced by the ribs 72a to 72d and 73a to 73d. On the other hand, since the stopper surface 75 is composed of the upper surfaces of the plurality of ribs 72a to 72d, it has high strength. Therefore, the stopper part 70 having a relatively high mechanical strength with a simple configuration can be obtained.

  Furthermore, in this embodiment, the stopper part 70 is provided in the position away from A1 part and A2 part in which the sealing surface of the inside / outside air switching box 40 is formed. Thereby, even if a relatively strong force is applied to the stopper portion 70 and the outer wall of the case 45 in the vicinity of the stopper portion 70 is deformed, the sealing surface can be prevented from being deformed, so that the sealing performance of the inside / outside air switching door 43 is maintained. it can.

  Further, in this embodiment, when a force parallel to the extending direction in the vicinity of the front end portion is applied to the front end portion of the passenger compartment side refrigerant pipe 22, the vicinity of the bending point 22a closest to the front end portion is caused by the stopper portion 70. It has come to be supported. Thereby, the stress which arises in the compartment side refrigerant | coolant piping 22 turns into a compressive stress parallel to an extending direction, and can reduce a stress component perpendicular | vertical to an extending direction. Therefore, the bending of the passenger compartment side refrigerant pipe 22 can be effectively regulated.

(Other embodiments)
In the said embodiment, although the example in which the expansion valve 60 was provided in the connection part of engine room side refrigerant | coolant piping and vehicle interior side refrigerant | coolant piping 21 and 22 was given, engine room side refrigerant | coolant piping and vehicle interior side refrigerant | coolant piping 21, 22 may be connected directly.

  In the above embodiment, the example in which the stopper portion 70 is provided in the inside / outside air switching box 40 has been described. However, a stopper portion may be provided on the side surface of the scroll case 50 on the gap portion 35 side.

  Furthermore, in the said embodiment, although only the stopper part 70 which controls the bending of the compartment side refrigerant | coolant piping 22 is provided, you may provide the stopper part which controls the bending of the compartment side refrigerant | coolant piping 21 separately. Further, when the cooling water pipes 15 and 16 extend to the engine room 102 side via the gap portion 35, a stopper portion for restricting the bending of the cooling water pipes 15 and 16 is provided on the outer wall of the blower unit 30. Also good.

It is a front view which shows the structure of the vehicle air conditioner in 1st Embodiment. It is a top view which shows the structure of the vehicle air conditioner in 1st Embodiment. It is a schematic diagram which shows the structure which looked at the inside / outside air switching box and the compartment side refrigerant | coolant piping from the air-conditioning unit side. It is sectional drawing which shows the structure of the stopper part cut | disconnected by the IV-IV line of FIG. 3, and the compartment side refrigerant | coolant piping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 10 Air-conditioning unit 20 Air-conditioning case 21, 22 Cabin side refrigerant | coolant piping 21a, 22a Bending point 30 Blower unit 35 Gap part 40 Inside / outside air switching box 43 Inside / outside air door 43a Rotating shaft 70 Stopper 74 First stopper Surface 75 Second stopper surface 100 Dash panel 101 Car compartment 102 Engine room 103 Through-hole

Claims (6)

A vehicle air conditioner disposed in a passenger compartment (101),
An air conditioning unit (10) for generating conditioned air by adjusting the temperature of the air circulating inside;
Airflow that is offset with respect to the air conditioning unit (10) and that switches between the inside air in the passenger compartment (101) and the outside air outside the passenger compartment (101) to generate an air flow toward the air conditioning unit (10). A unit (30);
A pipe extending from the air conditioning unit (10) to the engine room (102) side outside the vehicle compartment (101) via a gap (35) between the air conditioning unit (10) and the air blowing unit (30). (22)
A force that is molded integrally with the outer wall of the blower unit (30), protrudes toward the gap (35), and moves from the engine room (102) toward the vehicle compartment (101) is applied to the pipe (22). And a stopper portion (70) for supporting the pipe (22) and restricting the bending of the pipe (22) when added.   The stopper portion (70) has a first stopper surface (74) facing the engine room (102) and a second stopper surface (75) facing the gap portion (35). The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is provided.   The said stopper part (70) has a structure where the said 1st stopper surface (74) protruded rather than the said 2nd stopper surface (75), The Claim 1 or 2 characterized by the above-mentioned. Vehicle air conditioner. The pipe (22) is bent at at least one bending point,
When the force parallel to the extending direction in the vicinity of the tip of the pipe (22) is applied to the pipe (22), the stopper (70) is connected to the tip of the pipe (22). The vehicle air conditioner according to any one of claims 1 to 3, wherein the vehicular air conditioner is provided so as to support a vicinity of a bending point (22a) closest to the vehicle. The blower unit (30) includes an inside / outside air switching door (43) for switching and introducing the inside air and the outside air,
The said stopper part (70) is provided in the position away from the sealing surface which the sealing member of the said inside / outside air switching door (43) contacts, seeing from the said air-conditioning unit (10) side. Item 5. The vehicle air conditioner according to any one of Items 1 to 4. The blower unit (30) includes an inside / outside air switching door (43) for switching and introducing the inside air and the outside air,
The said stopper part (70) is provided in the said engine room (102) side rather than the rotating shaft (43a) of the said internal / external air switching door (43), The any one of Claim 1 thru | or 4 characterized by the above-mentioned. The vehicle air conditioner according to item.

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