JP3188736B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle disposed on a ceiling or the like of a vehicle, and more particularly, to a structure for maintaining the airtightness of a through portion of a partition plate for separating an indoor unit and an outdoor unit. The present invention relates to an air conditioner for a vehicle in which is improved.

[0002]

2. Description of the Related Art In general, a one-unit type vehicle air conditioner in which an indoor unit and an outdoor unit are integrally housed in one housing is known. The indoor unit and the outdoor unit are partitioned by a partition plate in the housing.

This type of vehicle air conditioner maintains airtightness between the indoor unit and the outdoor unit in order to prevent discomfort caused by a sudden change in air pressure when a high-speed vehicle enters a tunnel or the like. There is a need. However, a through-hole for passing the piping and wiring constituting the refrigeration cycle must be formed in the partition plate separating the indoor unit and the outdoor unit. Therefore, an airtight structure as shown in FIGS. 7 to 9 has been adopted for this penetrating portion.

[0004] As shown in the figure, a through hole 4 is formed in a partition plate 3 for partitioning the indoor unit 1 and the outdoor unit 2. Around the through hole 4, for example, four screw holes 5 are formed. Further, a ring flange 7 in which a cylindrical airtight rubber 6 is inserted is mounted in the through hole 4.
The piping 8 and wiring (not shown) which constitute a refrigeration cycle are inserted through the inside. And, the ring flange 7
, A ring flange-shaped airtight plate 10 is attached via a seal packing 9, and fixed screws and nuts 11 are fastened to these screw holes 5 respectively. Further, a tightening band 12 is attached to an outer peripheral portion of the hermetic rubber 6, and a gap between the hermetic rubber 6 and the pipe 8, a gap between the ring flange 7 and the hermetic plate 10, and fixed to the screw hole 5. The gap with the screw / nut 11 was sealed over the entire circumference by a sealing material 13 such as putty.

[0005]

By the way, in the conventional vehicle air conditioner, four pairs for attaching the ring flange 7 and the airtight plate 10 to the screw hole 5 formed around the through hole 4 are provided. Since the fixing screw / nut 11 described above is required and the fastening operation is performed in a narrow housing, there is a problem that the operation is difficult and complicated.

The screw hole 5 and the fixing screw / nut 1
In this case, it is necessary to seal the gap with the seal member 13 such as putty or the like, and there has been a problem that airtightness cannot be reliably maintained.

In view of the above problems, an object of the present invention is to
It is an object of the present invention to provide a vehicle air conditioner that can reliably maintain the airtightness of a through portion of a partition plate by a simple airtight maintenance operation.

[0008]

In order to achieve the above object, an air conditioner for a vehicle according to the present invention has an indoor unit and an outdoor unit housed in a single housing, and these are separated by a partition plate. In the compartmented air conditioner for a vehicle, a through hole formed in the partition plate, and a short tube for airtightness, which is inserted into the through hole and one end outer peripheral portion is fixed to the partition plate by watertight welding all around the periphery. One end is formed in a double cylindrical shape and is integrated at the end, and an inner cylindrical portion inserted into the airtight short pipe by tightly inserting a pipe or wiring inside thereof, and an inner surface thereof. An airtight rubber that constitutes an outer cylindrical portion attached so as to cover the outer peripheral surface on the other end side of the airtight short tube, and a tightening band attached to the outer peripheral portion of the outer cylindrical portion when the airtight short tube is mounted. It is characterized by having.

[0009]

According to the above construction, a through-hole is formed in the partition plate for partitioning the indoor unit and the outdoor unit, and an airtight short tube is inserted into the through-hole, and the outer peripheral portion of the partition plate is entirely connected to the partition plate. Since it is circumferentially watertight welded, the gap between the through hole formed in the partition plate and the airtight short pipe is made by circumferentially watertight welding,
It is surely kept airtight.

In addition, a cylindrical airtight rubber is inserted into the airtight short pipe, piping and wiring constituting a refrigeration cycle are inserted into the airtight rubber, and a tightening band is attached to an outer peripheral portion of the airtight rubber. Due to the flexibility of the rubber and the tightening force of the tightening band, the gap between the hermetic rubber and the piping or wiring is reliably maintained airtight.

Furthermore, the gap between the short tube and the hermetic rubber is reliably kept airtight by the flexibility of the hermetic rubber.

Since the fastening operation of fixing screws and nuts and the like as in the prior art is not required, the airtight maintenance operation is simplified, and a sealing material for sealing the screw portion and the like is not required.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

First, the entire vehicle air conditioner will be described.

As shown in FIGS. 4 to 6, an indoor unit 13 and an outdoor unit 14 are housed in a housing 12 of a vehicle air conditioner 11 of the present invention, and these are partitioned by a partition plate. 15 are defined. An indoor heat exchanger 16 and an indoor blower 17 are housed in the indoor unit 13. In the outdoor unit 14, a compressor 18, a pressure reducing device 19, an outdoor heat exchanger 20, and an outdoor blower 21 are housed. The compressor 18, the pressure reducing device 19, the indoor heat exchanger 16, and the outdoor heat exchanger 20 form a refrigeration cycle. The indoor heat exchanger 16 is provided along the partition plate 15, and an indoor blower 17 is provided on the indoor side. Further, one side wall of the indoor unit 13 located near the indoor blower 17 is provided with the indoor blower 1.
7 are formed. The outdoor heat exchangers 20 are respectively provided on opposing side walls of the outdoor unit 14, and an outdoor blower 21 is provided between the outdoor heat exchangers 20 so as to face upward.

As shown in FIGS. 1 to 3, a circular through hole 23 is formed in the partition plate 15 which partitions the indoor unit 13 and the outdoor unit 14 from each other. An airtight short tube 24 having an outer diameter slightly smaller than the inner diameter of the through hole 23 is inserted into the through hole 23. The outer peripheral portion of the airtight short tube 24 is welded to the partition plate 15 around the through hole 23 all around the periphery by watertight welding 25. In this embodiment, one end side of the airtight short pipe 24 is welded to the partition plate 15 by a watertight welding 25 all around.

A cylindrical hermetic rubber 26 is inserted into the hermetic short tube 24. This airtight rubber 26 is
One end is formed in a double cylindrical shape, and is integrated at the end. That is, the inner cylindrical portion 26a of the airtight rubber 26 is inserted into the airtight short tube 24, and the outer cylindrical portion 26b is inserted so as to cover the airtight short tube 24. And
A pipe 27 and a wiring (not shown) constituting a refrigeration cycle are inserted into the inner cylinder portion 26a of the hermetic rubber 26.
Therefore, the inner tube portion 26 of the airtight short tube 24 and the airtight rubber 26 is provided.
The inner diameter of “a” is formed large enough to allow passage of these pipes 27 and the like.

Further, two fastening bands 28 are attached to the outer peripheral portion of the outer cylindrical portion 26b of the airtight rubber 26 inserted so as to cover the airtight short tube 24. The outer diameter of the inner cylinder 26a of the airtight rubber 26 and the outer cylinder 26
The inner diameter of b is formed large enough to be in close contact with the inner or outer peripheral portion of the hermetic short tube 24.

The gap between the hermetic rubber 26 and the pipe 27 is properly sealed by a seal member 29 such as putty.

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

As described above, the indoor unit 13 and the outdoor unit 14 need to maintain airtightness in order to prevent discomfort due to a sudden change in air pressure when a high-speed vehicle enters a tunnel. . Since it is necessary to pass through the piping 27 and the like constituting the refrigeration cycle, it is necessary to form the through holes 23 in the partition plate 15 that partitions the indoor unit 13 and the outdoor unit 14. In the present embodiment, an airtight short tube 24 is inserted into a through hole 23 formed in the partition plate 15,
Is welded to the partition plate 15 around the through hole 23 all around in a watertight manner, so that the gap between the through hole 23 formed in the partition plate 15 and the outer peripheral portion of the airtight short pipe 24 is all around. The watertight welding 25 can reliably maintain the airtightness.

Further, an inner cylindrical portion 26a of a cylindrical hermetic rubber 26 is inserted into the hermetic short tube 24, and its outer cylindrical portion 2
6b is inserted so as to cover the outer peripheral portion of the airtight short tube 24. A pipe 27 forming a refrigeration cycle is inserted into the inner cylindrical portion 26a of the hermetic rubber 26, and a fastening band 2 is attached to the outer peripheral portion of the outer cylindrical portion 26b of the hermetic rubber 26.
8 is attached. Therefore, the gap between the hermetic rubber 26 and the pipe 27 can be securely hermetically maintained by the flexibility of the hermetic rubber 26 and the tightening force of the tightening band 28. If the gap between the airtight rubber 26 and the pipe 27 is sealed with a sealing material 29 such as putty, the airtightness can be maintained more reliably.

Further, the inner cylindrical portion 26a of the hermetic rubber 26 is provided.
The gap between the outer peripheral portion of the airtight short tube 24 or the inner peripheral portion of the outer cylindrical portion 26b of the hermetic rubber 26 and the outer peripheral portion of the hermetic short tube 24 is The airtightness can be reliably maintained by the flexibility.

In the air conditioner for a vehicle according to the present embodiment, there are no complicated parts such as fixing screws and nuts in the penetrating portion of the partition plate 15 as in the prior art, so that a fastening operation or the like in the narrow housing 12 is unnecessary. Since there is no need to seal the fixing screws, nuts, and the like, the airtight maintenance operation can be performed extremely easily.

In this embodiment, the partition plate 15
The two through holes 23 are formed in the airtight holding structure, but the present invention is not limited to this. For example, the pipes 27 and the like may be aggregated and passed through the through hole 23 of one airtight holding structure. You may do it.

[0026]

As described above, according to the air conditioner for a vehicle according to the present invention, the airtight maintenance of the penetration portion of the partition plate that separates the indoor unit and the outdoor unit can be performed by a simple airtight maintenance operation. Can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a main part of an embodiment of a vehicle air conditioner according to the present invention.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a schematic perspective view showing an airtight rubber in one embodiment of the vehicle air conditioner according to the present invention.

FIG. 4 is a schematic plan view showing one embodiment of the vehicle air conditioner according to the present invention.

FIG. 5 is a schematic front view of FIG.

FIG. 6 is a schematic side view of FIG.

FIG. 7 is a schematic diagram showing a main part of a conventional vehicle air conditioner.

FIG. 8 is a view taken along line VIII-VIII in FIG. 1;

FIG. 9 is a schematic perspective view showing an airtight holding component in a conventional vehicle air conditioner.

[Explanation of symbols]

 Reference Signs List 13 indoor unit 14 outdoor unit 15 partition plate 23 through hole 24 airtight short pipe 25 whole circumference watertight welding 26a inner cylinder part 26b outer cylinder part 26 airtight rubber 27 pipe 28 fastening band

Claims (1)

(57) [Claims] In a vehicle air conditioner in which an indoor unit and an outdoor unit are housed in a single housing and are partitioned by a partition plate, a through hole formed in the partition plate and the through hole are provided. A short pipe for airtightness, which is inserted into the inside and one end outer peripheral part is fixed to the above-mentioned partition plate by watertight welding all around, and one end side is formed in a double cylindrical shape and integrated at the end side, and piping inside Alternatively, an inner cylindrical portion inserted into the short tube for airtightness by tightly penetrating wiring, and an outer cylindrical portion mounted so that the inner surface thereof covers the outer peripheral surface on the other end side of the short tube for airtightness are configured. An air conditioner for a vehicle, comprising: a hermetic rubber; and a tightening band attached to an outer peripheral portion of the outer cylinder when the hermetic rubber is mounted on a short pipe for hermetic sealing.