JP5053777B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner, and more specifically, a refrigerant pipe that circulates a refrigerant between an outdoor unit placed in an engine room and an indoor unit provided in a vehicle compartment between the engine room and the room. The present invention relates to a seal structure around the refrigerant pipe when penetrating through a partition wall.

  2. Description of the Related Art Conventionally, as a vehicle air conditioner (hereinafter referred to as a car air conditioner), which is a vehicle air conditioner, a compressor that operates a refrigeration cycle compressor with a driving force of an engine or the like is generally used. In such a car air conditioner, the refrigerant pipe is usually penetrated through an opening of a dash panel (partition wall) that partitions the engine room and the vehicle compartment, and an outdoor unit (condenser, compressor, etc.) in the engine room and an indoor unit in the vehicle compartment. (Evaporator etc.) are connected.

  By the way, in rainy weather or the like, rainwater is scattered on the engine room side of the dash panel due to the front wheel jumping up or the like. In this case, there is a problem that rainwater enters into the vehicle compartment from the opening of the dash panel at the through portion of the partition wall of the refrigerant pipe. Therefore, a seal structure is known in which a packing made of urethane foam is wound around the refrigerant pipe and the opening of the dash panel is closed by the packing.

On the other hand, in recent years, the downsizing and space-saving of indoor units in car air conditioners are progressing in car air conditioners, and they are part of an evaporator (evaporator) and refrigerant piping in a resin air conditioning case that functions as an air conditioning duct. A technology for housing and integrating the evaporator tube has been developed and put into practical use. In general, the expansion valve disposed on the upstream side of the evaporator tube is preferably disposed not on the vehicle compartment but on the engine room side as much as possible because noise and vibration are likely to be generated or replaced easily. There is a demand to keep away from the heat of the engine, and for example, it is arranged in the opening of the dash panel. However, in such a structure, the opening of the dash panel tends to be large. For example, a technique for improving the sealing performance by closing the opening of the dash panel with a grommet made of an elastic body has been developed (patent) Reference 1).
JP 2002-301927 A

  However, in the technique disclosed in Patent Document 1 described above, for example, the evaporator tube penetrates the opening of the outer shell of the air conditioning case, although the grommet made of an elastic body can prevent rainwater from entering the vehicle interior side from the engine room. In the urethane foam as disclosed in Patent Document 1 as a packing, there is a problem that air flowing in the air conditioning case is likely to leak to the outside through a gap between the connecting portion and the opening of the outer shell of the air conditioning case. is there.

In addition, the evaporator tube is cooled by the action of the expansion valve, and moisture in the air flowing in the air conditioning case is likely to condense on the evaporator tube. There is a problem that it is easy to leak to the outside, particularly into the passenger compartment without being drained.
For this reason, in a car air conditioner that integrates an evaporator and an evaporator tube in an air conditioning case, rainwater from the engine room enters the vehicle compartment and the air conditioning case while avoiding noise and vibration due to the expansion valve. There is a need for a seal structure that reliably prevents leakage of air flowing through the air-conditioning case and water droplets due to condensation while preventing intrusion, but in this case, the seal structure can be installed without any deterioration in workability. It is also a problem to realize it easily.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a refrigerant in an opening of a partition wall that partitions an outdoor unit in the engine room and an indoor unit in the vehicle compartment from the engine room and the vehicle compartment. In a vehicle air conditioning system that integrates a part of the evaporator and refrigerant piping in an air conditioning case in the passenger compartment that functions as an air conditioning duct by connecting through the piping, avoiding noise and vibration caused by the expansion valve Leakage of water droplets to the outside due to air or condensation flowing in the air-conditioning case while preventing rainwater from entering the engine compartment and air-conditioning case while preventing the deterioration of assembly workability with a simple configuration An object of the present invention is to provide a vehicle air conditioner that reliably prevents the occurrence of problems and improves the sealing performance.

In order to achieve the above object, an air conditioner for a vehicle according to claim 1 is configured such that a refrigerant pipe is passed through an opening of a partition wall that partitions the engine room and the passenger compartment, and an outdoor unit in the engine compartment and an indoor unit in the passenger compartment. And a part of the refrigerant pipe penetrates through the opening hole of the outer shell of the air conditioning case and is housed in the air conditioning case to constitute the indoor unit, and the gap between the opening of the partition wall and the opening hole In the vehicular air conditioning apparatus, the refrigerant pipe is provided with an expansion valve member located at the opening of the partition wall, and a top surface is provided at the periphery of the opening hole of the air conditioning case. A peripheral wall is formed so as to protrude outwardly so as to abut against the opening peripheral edge of the partition wall via the seal member, and to house the expansion valve member on the inside, and the seal member includes a gap between the opening of the partition wall and each opening hole. Has elasticity to block The flange member is integrally formed with a bar member, and includes a flange that covers the top surface of the peripheral wall and a recess that bulges inside the peripheral wall so as to wrap the expansion valve member, and the refrigerant pipe in the recess A support wall that supports the expansion valve member so as to surround the expansion valve member via the seal member is formed extending inward on the peripheral wall. An extension wall is formed at a portion of the seal member that is in contact with the top surface of the support wall so as to surround the periphery of the through hole and extend inward of the air conditioning case so as to exceed the support wall. A tongue is formed on the lower edge extending vertically downward from the top of the extension wall, and a notch reaching the peripheral wall is formed on the periphery of the opening hole. Features.

Also, the vehicle air conditioning apparatus according to claim 2, in claim 1, wherein the tongue is characterized in that it forms a reversed triangular shape pointed tip.
According to a third aspect of the present invention, there is provided the vehicle air conditioner according to the first or second aspect , wherein the expansion valve member is provided on an expansion valve main body and a back surface of the expansion valve main body, and a part of the refrigerant pipe is connected to the expansion valve main body. The expansion valve stay is supported and fixed by a fastening member, and the support wall is supported so as to surround the expansion valve stay via the seal member.

According to a fourth aspect of the present invention, in the vehicle air conditioner according to the third aspect , the peripheral wall further holds the expansion valve body so as to surround the expansion valve body via the seal member.
Moreover, in the vehicle air conditioner according to claim 5 , in any one of claims 1 to 4 , a thick portion is formed intermittently at a portion of the seal member that contacts the top surface of the support wall. It is characterized by that.

The vehicle air conditioner according to claim 6 is characterized in that in any one of claims 1 to 5 , the air conditioning case is divided into an upper case and a lower case in the vertical direction so as to divide the opening hole. And

  According to the vehicle air conditioner of the first aspect, a part of the refrigerant pipe is penetrated to accommodate a part of the refrigerant pipe in the opening of the partition wall that partitions the engine room and the passenger compartment and the air conditioning case that constitutes the indoor unit. In the structure in which each gap of the opening hole of the outer shell is closed with a sealing member, the sealing member is integrally formed with an elastic rubber member so as to close each gap of the opening of the partition wall and the opening hole, and the periphery of the opening hole of the air conditioning case And a recess that bulges inside the peripheral wall so as to wrap around the expansion valve member interposed in the refrigerant pipe, and covers a part of the refrigerant pipe in the concave part. Since the air-conditioning case is assembled to the vehicle, the surface of the flange of the seal member is pressed against the peripheral edge of the opening of the partition wall by the top surface of the peripheral wall. Touch Becomes, communication between the engine room and the vehicle compartment is blocked in a watertight or airtight. As a result, even if rainwater scatters in the engine room, the rainwater is surely prevented from entering the passenger compartment. In addition, since a part of the refrigerant pipe penetrates the through hole in an airtight and liquid tight manner, the communication between the engine room and the inside of the air conditioning case is also shut off in a watertight or airtight manner. This reliably prevents rainwater from entering the air conditioning case and also prevents leakage of air flowing through the air conditioning case into the engine room.

  Further, when the air conditioning case is assembled to the vehicle, the back surface of the flange of the seal member is pressed against the top surface of the peripheral wall and comes into contact with the top surface, so that the communication between the passenger compartment and the air conditioning case is watertight or airtight. Will be blocked. This reliably prevents the air flowing in the air conditioning case from leaking into the vehicle interior, and also reliably prevents water droplets that have condensed due to a part of the refrigerant piping from becoming low temperature from leaking into the vehicle interior.

Further, since the seal member is made of an elastic rubber member, even if noise or vibration is generated by the expansion valve member, the noise or vibration is satisfactorily absorbed by the seal member.
Further, since the seal member is integrally formed so as to close the gaps between the opening and the opening hole of the partition wall, the seal member can be easily configured and the assembling workability of the apparatus is not deteriorated.
A support wall is formed on the peripheral wall so as to support the expansion valve member through the seal member. The support wall extends inward, and a portion of the seal member that contacts the top surface of the support wall has a through hole. An extension wall is formed to surround the periphery and extend beyond the support wall toward the inside of the air conditioning case, and at the lower edge of the extension wall , a tongue is formed extending vertically downward from the top of the extension wall , Since a notch reaching the peripheral wall is formed at the periphery of the opening hole, the water droplets condensed due to a part of the refrigerant pipe becoming low temperature may leak to the vehicle interior to some extent also by the support wall Although is blocked, the water droplets dammed the extension wall along flows down to the extension wall, further the falling water droplets are along the tongue as reaching the periphery of the through hole along the portion of the refrigerant pipe well was added dropwise Te, notches the periphery of the openings Omission in the air-conditioning case it, is well drained.

  Thus, according to the vehicle air conditioner of the first aspect of the present invention, it is possible to avoid noise and vibration due to the expansion valve member, and to prevent the deterioration of assembly workability with a simple configuration, While preventing rainwater from entering the passenger compartment or the air conditioning case, the air flowing in the air conditioning case or water droplets due to condensation can be reliably prevented from leaking to the outside, and the sealing performance around the refrigerant pipe can be improved.

Also, according to the vehicular air conditioning apparatus according to claim 2, tongues since an inverted triangular shape pointed tip, easier to integrated water droplets, can be more reliably drained.

According to the vehicle air conditioner of the third aspect , since the support wall supports the expansion valve stay via the seal member, for example, when the expansion valve main body is replaced, the expansion valve main body is attached to the expansion valve stay. When the fastening member is fastened or released for detachment, the force generated during the fastening or release can be satisfactorily received by the support wall, and the deterioration of the assembly workability of the device can be further prevented, and part of the refrigerant piping The expansion valve body can be attached and detached satisfactorily while preventing deformation and breakage.

Further, according to the vehicle air conditioner of the fourth aspect , since the peripheral wall is held so as to surround the expansion valve main body via the seal member, for example, when the expansion valve main body is replaced, a part of the refrigerant pipe is expanded. When installed in the valve body, a part of the refrigerant piping can be inserted straight without applying lateral force, and further deterioration of the assembly workability of the device can be prevented to prevent deformation or breakage of the refrigerant piping. In addition, the expansion valve body can be attached and detached satisfactorily.

According to the vehicle air conditioner of the fifth aspect, since the thick portion is formed intermittently at the portion of the seal member that contacts the top surface of the support wall, the support wall is interposed through the thick portion. For example, when replacing the expansion valve body, when fastening the fastening member to detach the expansion valve body from the expansion valve stay, the fastening force is good at the thick part. In addition, it is possible to effectively suppress noise and vibration generated by the expansion valve member.

According to the vehicle air conditioner of the sixth aspect , even if the air conditioning case is divided into the upper case and the lower case in the vertical direction so as to break the opening hole, the joint of the upper case and the lower case It can be completely closed by the integrally formed sealing member, and rain water can be surely prevented from entering the passenger compartment or the air conditioning case.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing a vehicle air conditioner according to the present invention mounted on a vehicle 1.
2. Description of the Related Art A vehicle air conditioner, that is, a vehicle air conditioner (hereinafter referred to as a car air conditioner) includes a compressor 10 and a condenser (not shown) as an outdoor unit in an engine room 2, and an air conditioning duct in a vehicle room 6. A resin air conditioning case 20 that functions as an indoor unit having an evaporator (not shown) and metal evaporator tubes (parts of refrigerant piping) 16 and 18 are arranged and configured as an indoor unit. And the indoor unit are connected by metal pipes 12 and 14 to form a refrigeration cycle.

In other words, the car air conditioner is configured to be capable of air conditioning the vehicle interior by operating the compressor 10 with the driving force of the engine 4.
As shown in FIG. 1, the vehicle 1 is provided with a dash panel (partition wall) 8 so as to partition the engine room 2 and the vehicle compartment 6, and refrigerant pipes such as pipes 12 and 14 are connected to the dash panel 8. The outdoor unit and the indoor unit are connected through the opening 9.

Specifically, the pipes 12 and 14 on the engine room 2 side and the evaporator tubes 16 and 18 on the vehicle compartment 6 side are respectively connected via an expansion valve (expansion valve member) 50, and the expansion valve 50 is connected to the refrigerant pipe. It is located in the opening 9 of the dash panel 8 as a component.
The evaporator tubes 16 and 18 pass through the opening hole of the outer shell of the air conditioning case 20 and extend into the air conditioning case 20, and the through portions of the evaporator tubes 16 and 18 close the gap of the opening hole and A rubber-made rubber (for example, EPDM) grommet (seal member) 60 is integrally provided so as to be able to close the gap of the opening 9 of the panel 8.

Referring to FIG. 2, the inside of the air conditioning case 20 viewed from the direction of arrow A in FIG. 1 and the periphery of the opening hole 23 opened to the outer shell of the air conditioning case 20 is shown. The opening hole 23 is formed in a long hole shape in the vertical direction, and the evaporator tubes 16 and 18 both extend through the long hole opening hole 23 into the air conditioning case 20.
On the other hand, FIG. 3 shows the periphery of the opening 9 of the dash panel 8 as viewed from the direction of arrow B in FIG. 1, and the expansion valve 50 is wrapped around the central portion of the grommet 60 as shown in FIG. A recess 60a is formed. An expansion valve 50 is fitted in the recess 60 a, and a peripheral flange 63 of the flat grommet 60 is in contact with the periphery of the opening 9 of the dash panel 8.

Referring to FIG. 4, an exploded configuration diagram of the evaporator tubes 16 and 18, the air conditioning case 20, the expansion valve 50 and the grommet 60 is shown.
As shown in the figure, the air conditioning case 20 is divided into an upper case 21 and a lower case 22 in the vertical direction so as to divide the opening hole 23 into an upper opening hole 23a and a lower opening hole 23b, and each outer shell 21a, 22a. They are configured to abut each other and overlap in the middle.

  The air conditioning case 20 has an annular peripheral wall 24 that protrudes outward from the periphery of the opening hole 23 in a state where the upper case 21 and the lower case 22 are overlapped with each other, and is surrounded by the peripheral wall 24. An accommodating portion 25 is formed to hold the recess 60a of the grommet 60 into which the expansion valve 50 is fitted. The upper case 21 and the lower case 22 are divided into upper and lower peripheral walls 24a and 22b, respectively. 24b is formed.

On the other hand, referring to FIG. 5, there is shown a perspective view of the grommet 60 as viewed from the back. As shown in FIG. 4 and FIG. 5, the rubber grommet 60 has an evaporator tube in detail at the bottom of the recess 60a. It has through holes 61 and 62 through which 16 and 18 pass, and is integrally molded.
Thus, as shown in the figure, the evaporator tubes 16 and 18 pass through the through holes 61 and 62 of the grommet 60 and pass through the O-rings 17 and 19 to the passage holes 52 and 54 of the expansion valve 50, respectively. The flanges 16 a and 18 a are pressed and fixed to the expansion valve (expansion valve main body) 50 by being fitted and the expansion valve stay (expansion valve member) 70 is fastened with the screw 72. The stay 70 is fitted in the recess 60 a of the grommet 60.

The inner diameters of the through holes 61 and 62 of the grommet 60 are slightly smaller than the outer diameters of the evaporator tubes 16 and 18, and the through holes 61 and 62 are configured to be tightly fitted to the evaporator tubes 16 and 18. ing.
And in the said accommodating part 25 enclosed by the surrounding wall 24 of the air-conditioning case 20, the side part corresponding to the said expansion valve stay 70 among the recessed parts 60a of the grommet 60 in the state which the upper case 21 and the lower case 22 were piled up. A support wall 26 is formed so as to surround 64, and an upper support wall 26a and a lower support wall 26b are respectively formed in the upper case 21 and the lower case 22 by dividing the support wall 26 into upper and lower parts. Yes.

  Thus, the support wall 26 is formed in the air conditioning case 20, and the upper support wall 26a and the lower support wall 26b are formed in the upper case 21 and the lower case 22, respectively, so that the upper opening hole 23a of the outer shell 21a is formed. Between the peripheral edge and the upper support wall 26a and between the peripheral edge of the lower opening hole 23b and the lower support wall 26b in the outer shell 22a, that is, with the upper case 21 and the lower case 22 overlapped, A gap 27 is formed between the support wall 26 and the support wall 26.

In the outer shell 22a, a slit (notch) 28 is formed in the peripheral portion of the lower opening hole 23b by cutting from the lower opening hole 23b to the lower peripheral wall 24b. And communicate with each other through the slit 28.
Referring again to FIG. 5, the portion of the grommet 60 that contacts the top surface of the support wall 26, that is, the side portion 64 corresponding to the expansion valve stay 70, extends toward the inside of the air conditioning case 20 except for the upper portion. 66 is formed. Specifically, the extension wall 66 extends beyond the support wall 26.

Further, a tongue 67 is provided at the lower edge of the extension wall 66 so as to extend vertically downward from the top of the extension wall 66. The tongue 67 has a pointed tip as shown in FIG. I am doing.
Further, a plurality of raised portions 65 are formed on the side portion 64 and the extension wall 66, so that the support wall 26 actually contacts the raised portion 65 with the upper support wall 26 a and the lower support wall 26 b. The side part 64 is supported by this.

Further, guide flanges 68 and 69 are formed at the upper and lower ends of the peripheral flange 63 so as to extend inward of the air conditioning case 20, respectively.
In the assembly process, the evaporator tubes 16 and 18, the air conditioning case 20, the expansion valve 50 and the grommet 60 are attached to the evaporator tubes 16 and 18, and the expansion valve 50 and the expansion valve are disposed in the recess 60 a of the grommet 60. In this state, first, the evaporator tube 18 passes through the lower opening hole 23b, and the rear surfaces of the peripheral flange 63 and the guide flange 69 cover the top surface of the lower peripheral wall 24b and the expansion valve stay 70. The side 64 of the grommet 60 and the raised portion 65 corresponding to the lower grommet 60 are fitted into the lower support wall 26 b, and the tip of the extension wall 66 and the tongue 67 are positioned in the gap 27, so that they are located in the lower peripheral wall 24 b on the lower case 22 side. Stored. Next, the evaporator tube 16 passes through the upper opening hole 23a, the back surface of the peripheral flange 63 and the guide flange 68 covers the top surface of the upper peripheral wall 24a, and the side portion 64 and the raised portion 65 are the upper support wall 26a. The upper case 21 is superimposed on the lower case 22 so that the outer shells 21a and 22a come into contact with each other. Thus, the evaporator tubes 16 and 18, the expansion valve 50, the expansion valve stay 70 and the grommet 60 are easily attached to the air conditioning case 20.

  Referring to FIG. 6, a cross-sectional view taken along the line CC in FIG. 2, that is, a cross-sectional view in a state where the evaporator tubes 16 and 18, the expansion valve 50 and the grommet 60 are mounted on the air conditioning case 20 and mounted on the vehicle 1 is shown. FIG. 7 shows a top view of the evaporator tubes 16, 18, the expansion valve 50 and the grommet 60 mounted on the lower case 22. Referring to FIG. 8, from the direction of arrow D in FIG. The see-through | perspective view is shown, and the effect | action and effect of the vehicle air conditioner which concern on this invention are demonstrated based on these FIGS. 6-8 below.

First, as described above, the grommet 60 is integrally molded so as to close the opening hole 23 and to close the opening 9 of the dash panel 8. Thereby, the grommet 60 can be made into a simple structure, and it can prevent the assembly workability | operativity of apparatuses, such as the grommet 60 and the expansion valve 50, from deteriorating.
As described above and clearly from FIGS. 6 to 8, the surface of the peripheral flange 63 of the grommet 60 is in contact with the peripheral edge of the opening 9 of the dash panel 8. As described above, the surface of the peripheral flange 63 of the rubber grommet 60 having elasticity is in contact with the peripheral edge of the opening 9 so that the surface of the peripheral flange 63 functions as a seal portion. As a result, the communication between the engine room 2 and the vehicle compartment 6 is shut off in a watertight or airtight manner, and even if rainwater scatters as shown by arrows in FIG. 1, the entry of the rainwater into the vehicle compartment is reliably prevented. .

  In particular, in the vehicle air conditioner according to the present invention, the opening 23 is divided into the upper case 21 and the lower case 22 in the vertical direction so as to be divided into the upper opening 23a and the lower opening 23b. The evaporator tubes 16 and 18, the expansion valve 50 and the grommet 60 can be easily attached to the air conditioning case 20 with a simple configuration as described above, but even with such a structure, the joint between the upper case 21 and the lower case 22 can be attached. The grommet 60 can completely block the rainwater and can surely prevent the rainwater from entering the passenger compartment.

  Further, the rear surfaces of the peripheral flange 63 and the guide flanges 68 and 69 of the grommet 60 cover the top surfaces of the upper peripheral wall 24a and the lower peripheral wall 24b and are in contact with these. As described above, the back surface of the peripheral flange 63 is in contact with the top surface of the peripheral wall 24, so that the back surface of the peripheral flange 63 also functions as a seal portion. As a result, the communication between the housing 25 surrounded by the vehicle compartment 6 and the peripheral wall 24 and thus the air conditioning case 20 is shut off in a watertight or airtight manner, and the air flowing in the air conditioning case 20 is opened as shown by a chain line arrow in FIG. Even if it flows into the accommodating part 25 through the space | interval 27 between the periphery of the opening hole 23 and the support wall 26 from the hole 23, the leak into the compartment 6 of the said air is prevented reliably.

  Further, when the evaporator tubes 16 and 18 are cooled by the action of the expansion valve 50, moisture in the air flowing in the air conditioning case 20 is condensed on the evaporator tubes 16 and 18, and the back surface of the peripheral flange 63 is thus sealed. By functioning as a portion, leakage of the condensed water droplets into the vehicle interior 6 is reliably prevented. In addition, since the side part 64 of the grommet 60 is supported so that it may be enclosed by the support wall 26, the leakage of the condensed water droplet into the vehicle interior 6 is also prevented to some extent by this.

  Further, as described above, the through holes 61 and 62 of the grommet 60 are configured to be watertight and airtight by interference fitting with respect to the evaporator tubes 16 and 18, and the expansion valve 50 and the expansion valve stay 70 are formed in the recess 60 a of the grommet 60. Therefore, the periphery of the through holes 61 and 62 and the recess 60a itself also function as a seal portion. As a result, the communication between the engine room 2 and the air conditioning case 20 is shut off in a watertight or airtight manner, and the intrusion of rainwater into the air conditioning case 20 is reliably prevented, and the air flowing in the air conditioning case 20 and the above dew condensation Leakage of water droplets into the engine room 2 is also reliably prevented.

  Further, in the vehicle air conditioner of the present invention, since the extension wall 66 extends from the side portion 64 of the grommet 60 corresponding to the expansion valve stay 70, condensation is formed on the evaporator tubes 16 and 18, as shown in FIG. Even if the water droplets that have passed through the evaporator tubes 16 and 18 reach the grommet 60, the water droplets are blocked by the extension wall 66, and flow down along the extension wall 66, and the peripheral edge of the opening hole 23 and the support wall 26. It drops and accumulates in the gaps 27 therebetween, and is drained into the air conditioning case 20 through the slits 28. Although not shown, the air conditioning case 20 is provided with a drainage drain, so that water droplets do not collect in the air conditioning case 20 and are well drained to the outside.

In particular, in the vehicle air conditioner according to the present invention, since the tongue 67 of the inverted triangle shape is provided at the lower edge of the extension wall 66 and extends downward from the top of the extension wall 66, it flows down along the extension wall 66. All of the water droplets are well collected in the gap 27 along the tongue 67 and drained reliably.
As described above and clearly from FIG. 7, the side portion 64 and the extension wall 66 are formed with a plurality of thick raised portions (thick portions) 65, and the raised portions 65 are elastic. The side part 64 is supported by the upper support wall 26a and the lower support wall 26b by contacting the upper support wall 26a and the lower support wall 26b while being deformed. As described above, when the side portion 64 corresponding to the expansion valve stay 70 is securely in contact with the upper support wall 26a and the lower support wall 26b via the raised portion 65, for example, when the expansion valve 50 is replaced, the expansion valve 50 or the like. When the screw (fastening member) 72 is rotated (fastened or released) to detach 50 from the expansion valve stay 70, the rotating force can be well received by the upper support wall 26a and the lower support wall 26b. Further, the expansion valve 50 can be attached and detached satisfactorily while further preventing deterioration of the assembly workability of the apparatus and preventing deformation and breakage of the evaporator tubes 16 and 18.

  In addition, since the expansion valve 50 is fitted into the recess 60a of the grommet 60 and is held in the accommodating portion 25, the evaporator tubes 16 and 18 are inserted into the passage holes 52 and 54 of the expansion valve 50 when the expansion valve 50 is replaced, for example. In the case of fitting, the evaporator tubes 16 and 18 can be inserted straight into the passage holes 52 and 54 without applying a lateral force, and further the deterioration of the assembly workability of the apparatus is prevented, and the evaporator tubes 16 and 18 are deformed. The expansion valve 50 can be attached and detached satisfactorily while preventing damage and the like.

  Further, as described above, the expansion valve 50 is likely to generate noise and vibration, and is likely to cause discomfort to the occupant of the vehicle 1. However, the expansion valve 50 is positioned at the opening 9 of the dash panel 8 and is made of rubber (for example, By enveloping the expansion valve 50 with a grommet 60 made of EPDM, such noise and vibration can be absorbed by the elasticity of the grommet 60 and reduced satisfactorily. In particular, since the expansion valve stay 70 is supported by the support wall 26 via the thick raised portion 65, the noise and vibration can be effectively suppressed by the action of the raised portion 65.

The description of one embodiment of the present invention is finished above, but the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the plurality of raised portions (thick portions) 65 are formed on the side portion 64 and the extension wall 66 of the grommet 60. However, for example, the thickness of the side portion 64 and the extension wall 66 is sufficiently large. For example, the raised portion 65 is not necessarily required, and even in this case, the same effect as described above can be obtained.

  Moreover, in the said embodiment, although the guide flanges 68 and 69 were provided in the grommet 60, these are not essential especially.

It is a schematic block diagram which shows the vehicle air conditioner which concerns on this invention. It is the inside of the air-conditioning case seen from the arrow A direction of FIG. It is a figure which shows the periphery of opening of a dash panel seen from the arrow B direction of FIG. It is a disassembled block diagram of an evaporator tube, an air-conditioning case, an expansion valve, and a grommet. It is the perspective view seen from the back of a grommet. It is sectional drawing which follows the CC line of FIG. It is an upper view which shows the state with which the evaporator tube, the expansion valve, and the grommet were mounted | worn with the lower case. It is the perspective view seen from the arrow D direction of FIG.

Explanation of symbols

1 vehicle 2 engine room 6 compartment 8 dash panel (partition)
9 Opening 16, 18 Evaporator tube (part of refrigerant piping)
20 Air-conditioning case 21 Upper case 22 Lower case 23 Opening hole 24 Peripheral wall 25 Storage part 26 Support wall 28 Slit (notch)
50 Expansion valve (expansion valve member, expansion valve body)
60 Grommet (seal member)
60a Recess 61, 62 Through-hole 63 Peripheral flange (flange)
64 Side 65 Raised part (thick part)
66 Extension wall 67 Tongue 70 Expansion valve stay (expansion valve member)

Claims (6)

Refrigerant piping penetrates through the opening of the partition wall that partitions the engine room and the vehicle compartment to connect the outdoor unit in the engine room and the indoor unit in the vehicle interior, and a part of the refrigerant piping is connected to the outer shell of the air conditioning case. In the vehicle air conditioner, wherein the indoor unit is configured by penetrating through the opening hole of the partition wall and constituting the indoor unit, and the gap between the opening of the partition wall and the opening hole is closed with a seal member.
An expansion valve member is interposed in the refrigerant pipe at the opening of the partition wall,
On the periphery of the opening hole of the air conditioning case, a peripheral wall is formed that protrudes outward so that the top surface contacts the opening periphery of the partition wall via the seal member, and houses the expansion valve member inside,
The seal member is integrally formed of a rubber member having elasticity to close each gap between the opening of the partition wall and the opening hole, and includes a flange that covers the top surface of the peripheral wall and the expansion valve A recess that bulges inside the peripheral wall so as to wrap the member, and has a through-hole that allows a part of the refrigerant pipe to pass through in an airtight and liquid-tight manner in the recess;
A support wall that supports the expansion valve member via the seal member so as to surround the expansion valve member extends inwardly on the peripheral wall,
A portion of the seal member that contacts the top surface of the support wall is formed with an extension wall that surrounds the periphery of the through hole and extends inward of the air conditioning case so as to exceed the support wall.
At the lower edge of the extension wall, a tongue is formed extending vertically downward from the top of the extension wall,
At the periphery of the opening hole, a notch reaching the peripheral wall located at the lower part is formed,
An air conditioner for a vehicle. The tongue is characterized in that it forms a reversed triangular shape pointed tip, vehicular air conditioning apparatus according to claim 1. The expansion valve member includes an expansion valve main body and an expansion valve stay provided on the back surface of the expansion valve main body for supporting and fixing a part of the refrigerant pipe to the expansion valve main body with a fastening member,
The vehicle air conditioner according to claim 1 or 2 , wherein the support wall supports the expansion valve stay via the seal member. Furthermore, the said surrounding wall hold | maintains the said expansion valve main body through the said sealing member, The vehicle air conditioner of Claim 3 characterized by the above-mentioned. The vehicle air conditioner according to any one of claims 1 to 4 , wherein a thick portion is formed intermittently at a portion of the seal member that contacts the top surface of the support wall. The vehicle air conditioner according to any one of claims 1 to 5 , wherein the air conditioning case is divided into an upper case and a lower case in a vertical direction so as to divide the opening hole.

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