JP3380715B2 - Heat exchange equipment processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of processing a heat exchange device for exchanging heat by circulating a refrigerant, and relates to various air conditioners for automobiles, buildings, trains, ships, aircrafts, etc. Machine, including dedicated heating machine), seafood, vegetables,
It can be used for a heat exchanger such as a refrigerator for food such as meat, a refrigerator, a refrigerator for home use, and the like.

[0002]

BACKGROUND ART In an air conditioner for an automobile, a refrigerant circulation path for circulating a refrigerant compressed and fed by a compressor is formed by connecting a plurality of refrigerant circulation pipes, and the refrigerant circulation path is compressed. Machine, an evaporator that is a first heat exchanger, and various refrigerant devices including a condenser that is a second heat exchanger are arranged in series, and the heat in the vehicle interior is absorbed by the refrigerant in the evaporator,
By releasing this heat to the outside in the condenser, the temperature inside the vehicle interior is lowered.

When disassembling and discarding an automobile due to aging or the like, conventionally, a refrigerant recovery device is connected to a refrigerant distribution pipe or a refrigerant device forming a refrigerant circulation path of an air conditioner mounted on the vehicle. , The automobile was disassembled and discarded after all the refrigerant was collected.

[0004]

According to this prior art, when the air conditioner is mounted on an automobile and the refrigerant circulation path is in a communicating state, the refrigerant recovery operation must be performed by the refrigerant recovery device. Instead, the refrigerant circulation path is divided for each refrigerant device such as the first heat exchanger and the second heat exchanger that constitute the air conditioner, these are separated from each other and removed from the automobile, and then the refrigerant is removed from each. It was not possible to do the work of collecting.

In order to facilitate and improve the work including the recovery of the refrigerant, the automobile air conditioner is removed from the automobile,
It is desirable to perform work such as refrigerant recovery for each refrigerant device that makes up the air conditioner in a dedicated work place installed in a place other than the dismantling and disposal place of the vehicle,
Conventionally, when the air conditioner is removed from the automobile, the refrigerant circuit formed by the connection of a plurality of refrigerant distribution pipes cannot be maintained in a predetermined circuit shape due to bending, etc. Cannot remove the air conditioner from the vehicle and cannot divide the refrigerant circulation path for each refrigerant device, which makes the air conditioner difficult to handle and facilitates work including refrigerant recovery. It was difficult to achieve this.

An object of the present invention is to provide a method of treating a heat exchange device, which facilitates handling when performing work such as refrigerant recovery and makes it easier to perform the work.

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

A method for treating a heat exchange apparatus according to the present invention comprises a first heat exchanger, a second heat exchanger, and a compressor, which are compressed and fed by the compressor. At least one refrigerant of the first heat exchanger, the second heat exchanger, and the compressor is arranged in series as a refrigerant device in a refrigerant circulation path through which the refrigerant to be supplied circulates, and in this refrigerant circulation path. On-off valves are provided on the upstream side and the downstream side in the refrigerant circulation direction with respect to the device , and the refrigerant circulation path is
It consists of multiple sub-paths separated by open / close valves,
The on-off valve was provided on the upstream side and the downstream side in the medium flow direction.
The partial path including the refrigerant device and these opening / closing valves is
Can be separated from other sub-paths adjacent to
And the on-off valve is the first on-off valve.
The other partial path adjacent to the partial path including the on-off valve
A second on-off valve is provided at the end of the first on-off valve side of the
The first on-off valve and the second on-off valve can be connected and separated.
That the partial road is in contact with the other partial road.
Continuing, a processing method for processing the heat exchange device that can be separated
A first opening / closing valve and a second opening / closing valve respectively
After closing the valve and the refrigerant flow direction upstream side and downstream side
The refrigerant device provided with the first opening / closing valve is
The first on-off valve and the second on-off valve with the one on-off valve still connected
Separated from the other partial passage by separation from the valve and taken out
Then, after this, the first on-off valve is removed with it still connected.
The refrigerant is recovered from the above-mentioned refrigerant device .

According to this, the refrigerant device, which is smaller than the entire air conditioner, can be easily transported to and handled in a place where work such as refrigerant recovery is performed while the refrigerant is contained in the refrigerant device. Therefore, the work can be simplified.

Refrigerant inside the refrigerant device taken out with the on-off valve connected is recovered by opening the on-off valve or by the refrigerant device itself or a connecting pipe connecting the refrigerant device and the on-off valve. Recovery is performed by piercing the recovery tip of the device, or by connecting the refrigerant recovery device to a refrigerant recovery tool provided in a connection pipe or the like. The recovered refrigerant may be filled in another heat exchange device for reuse, and a refrigerant having an adverse effect on the environment may be destroyed by chemical treatment or the like.

Further, when the refrigerant apparatus in which the first on-off valve is removed still connected can be reused without Old is the refrigerant apparatus, the first on-off valve is connected and the interior Assembling as a refrigerant device of another heat exchange device while leaving the refrigerant, and thereafter, opening the first opening / closing valve forming the refrigerant circulation path of the other heat exchange device, and reusing these refrigerant devices and refrigerant You may do it.

[0021] According to this, the refrigerant device can be reused in addition to the refrigerant, and the recycled materials can be expanded to the refrigerant device.

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

Further, the on-off valve may be of any type, for example, a type in which the valve member is opened and closed by moving the valve member in a direction perpendicular to the refrigerant flow direction, or the valve member is 90 degrees in the refrigerant flow passage in the on-off valve. The type that opens and closes when the direction of the refrigerant flow hole formed in the valve member changes with respect to the refrigerant flow direction by rotating the valve member by a predetermined angle, and the valve member has the same refrigerant flow direction inside the on-off valve. The valve may be reciprocally movable in any direction, and the on-off valve may be closed when the valve member contacts the valve seat, and the on-off valve may be opened when the valve member is separated from the valve seat.

The on-off valve may be a manual on-off valve opened and closed by an operator or an automatic on-off valve such as an electromagnetic type.
When the on-off valves are electromagnetic type automatic on-off valves, for example, in an automobile air conditioner, all the on-off valves are closed when the engine of the automobile is stopped, and the engine is started by operating the ignition key. All the open / close valves may be opened by a signal from the ignition key device when they are operated.

In this way, even if the automobile encounters an accident while the engine is stopped and the refrigerant circulation passage of the air conditioner is damaged, the leakage of the refrigerant from this refrigerant circulation passage can be suppressed to a small amount. .

The present invention described above includes the first heat exchanger and the second heat exchanger.
Any heat exchange device can be applied as long as the heat exchanger and the compressor are arranged in series in the refrigerant circulation path, for example,
Various air conditioners for automobiles, including air-conditioning machines and heating machines, buildings, trains, ships, aircraft, seafood,
It can be applied to heat exchangers such as refrigerators for foods such as vegetables and meat, refrigerators, household refrigerators, etc. Further, these heat exchange devices may be a separate type in which the indoor unit and the outdoor unit are separated, or may be an integrated type in which the indoor unit and the outdoor unit are not separated.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a heat exchange device according to the present embodiment, and this heat exchange device is an air conditioner 1 for an automobile. The vehicle air conditioner 1 has a refrigerant circulation path 2
A first heat exchanger 3, a pressure regulator (EPR) 4, a compressor 5, a second heat exchanger 6, a receiver 7, and an expansion valve 8 are arranged in series in the vehicle. The rotation of the engine is transmitted through the belt 5A, and the compressor 5 is driven, whereby the refrigerant is pressure-fed through the refrigerant circulation path 2 from the first heat exchanger 3 side to the second heat exchanger 6 side. The first heat exchanger 3 serves as an evaporator and the second heat exchanger 6 serves as a condenser during this circulation, whereby heat in the vehicle interior is released to the outside of the vehicle interior, It is cooled.

At this time, the pressure adjusting device 4 adjusts the pressure of the refrigerant in the device 4 so that the refrigerant does not freeze, the receiver 7 filters fine dust in the refrigerant, and the expansion valve 8 operates. The refrigerant sent as a liquid is vaporized into gas and sent to the first heat exchanger 3.

When the air conditioner 1 also has a heating function, the refrigerant circulates in the refrigerant circulation path in the opposite direction to the above due to the action of a switching valve (not shown), and at this time, the first heat exchanger 3 The second heat exchanger 6 serves as an evaporator as well as the condenser.

The first heat exchanger 3 and the pressure adjusting device 4 are connected via connecting pipes 21 and 31 in which the opening / closing valve device 11 is provided, and the pressure adjusting device 4 and the compressor 5 are connected to the opening / closing valve device 12. Are connected via connecting pipes 22 and 32, in which the compressor 5 and the second heat exchanger 6 are connected via connecting pipes 23, 33 and 43, in which the on-off valve devices 13 and 14 are interposed. The second heat exchanger 6 and the receiver 7 are connected via the connection pipes 24 and 34 in which the opening / closing valve device 15 is installed, and the receiver 7 and the expansion valve 8 are installed in the opening / closing valve device 16. The expansion valve 8 and the first heat exchanger 3 are connected via the connecting pipes 25 and 35, and are connected via the connecting pipe 36. Connection pipes 21 to 25, 31 to 3 provided with these on-off valve devices 11 to 16 and serving as refrigerant flow pipes
The refrigerant circulation path 2 is formed by the reference numerals 6, 43, and the refrigerant is supplied to the refrigerant circulation path 2 by the refrigerant supply port 4A provided in the pressure adjusting device 4 and the refrigerant supply provided in the connection pipe 25. It is designed to be performed from the tool 40.

3 and 4 show specific structures of the on-off valve devices 11-16. These on-off valve devices 11 to 16 have the same structure, and all the on-off valve devices 11 to 16 have 2
The individual on-off valves 51 and 52 are formed by being separably connected by a nut 53. The connecting pipes 21 to 25, 3 are attached to the male screw portion 54A provided on the valve body 54 of the on-off valve 51.
The flare end portion of No. 3 is connected by a flare nut 55, and the flare end portions of the connecting pipes 31-35 are connected by a flare nut 57 to the male screw portion 56A provided on the valve body 56 of the on-off valve 52. There is.

The opening / closing structures of the opening / closing valves 51 and 52 are the same. That is, the valve body 5 of these on-off valves 51 and 52
The guide grooves 60, 6 are formed in the guide grooves 60, 6 at right angles to the refrigerant flow passages 58, 59 formed inside the valve bodies 54, 56.
A valve member 62 in the form of a thick plate, which is guided by 1 and is movable.
63 are incorporated, and the valve bodies 54, 56 are provided in the screw holes 62A, 63A formed in the valve members 62, 63, respectively.
Convex portions 66A, 66B, 67A, 67B on the lids 64, 65 of the
The screw shafts 66 and 67, which are prevented from moving in the axial direction, are screwed in, and rotary knobs 68 and 69 are attached to the ends of the screw shafts 66 and 67 protruding from the lids 64 and 65. By operating these knobs 68 and 69 in the forward and reverse directions, the valve members 62 and 63 reciprocate and the refrigerant flow passages 58 and 59 are blocked and opened, so that the on-off valves 51 and 52 are opened and closed.

The connecting pipe 21 is attached to the valve body 54 of the on-off valve 51.
To 25, 33 are formed with a right-handed male screw portion 54B having a refrigerant flow passage 58 formed therethrough, and the valve body 56 of the on-off valve 52 communicates with the connection pipes 31 to 35, 43. A left-handed external thread portion 56B is formed through which the refrigerant flow passage 59 is formed, and the nut 53 is formed with right-handed and left-handed female thread portions 53A and 53B corresponding to the external thread portions 54B and 56B. . Therefore, the male screw portion 5 of the on-off valves 51 and 52 which are separated as shown in FIG.
When the female screw portions 53A and 53B are screwed into the 4B and 56B and the nut 53 is rotated clockwise by the tool, the on-off valves 51 and 52 are connected via the nut 53, and then the knob 68, At 69, the valve members 62 and 63 are connected to the refrigerant flow passage 5
When it is moved backward from 8, 59, the refrigerant flow passages 58, 59 communicate with each other by opening the opening / closing valves 51, 52. When the nut 53 is rotated counterclockwise by a tool, the on-off valves 51 and 52 are separated as shown in FIG.
To move the valve members 62 and 63 forward to move the refrigerant flow passage 58,
When 59 is shut off and the on-off valves 51 and 52 are closed, the refrigerant does not leak from the refrigerant flow passages 58 and 59.

FIG. 2 shows that after closing the opening / closing valves 51 and 52 of all the opening / closing valve devices 11 to 16, these opening / closing valves 51 and 52 are closed.
Shows the time when separated. As can be seen from FIG. 2, the refrigerant circulation path 2 includes the opening / closing valves 51, 52 of the opening / closing valve devices 11-16.
, Specifically, a total of six partial paths A to F divided between the on-off valves 51 and 52. These partial paths A to F are provided with opening / closing valves at the most upstream end and the most downstream end in the refrigerant flow direction. These on-off valves are the on-off valve 51 of the on-off valve device 11 and the on-off valve 52 of the on-off valve device 16 for the partial path A having the first heat exchanger 3.
The partial path C having the compressor 5 is the opening / closing valve 51 of the opening / closing valve apparatus 13 and the opening / closing valve 52 of the opening / closing valve apparatus 12, and the partial path E having the second heat exchanger 6 is the opening / closing valve. Open / close valve 51 of device 15 and open / close valve 5 of open / close valve device 14
It is 2.

The connecting pipe 16 connecting the first heat exchanger 3 and the expansion valve 8 in the partial path A has a short length, and the expansion valve 8 is arranged close to the first heat exchanger 3. , Substantially the first heat exchanger 3
And the expansion valve 8 are arranged in the partial path A as one refrigerant device.

In this embodiment, opening / closing valves 51 and 52 are provided at both ends of all the partial paths A to F, and adjacent partial paths are connected and separated by the opening / closing valves 51 and 52 via the nut 53. Since it is free, if the opening / closing valve of one of the two adjacent partial paths is the first opening / closing valve,
The opening / closing valve provided at the end portion of the other partial passage on the side of the first opening / closing valve becomes the second opening / closing valve, and adjacent partial passages can be connected and separated by the first opening / closing valve and the second opening / closing valve. Has become. This will be described for the partial path C. The opening / closing valve 51 of the opening / closing valve device 13 and the opening / closing valve 52 of the opening / closing valve device 12 will be described.
Are the first on-off valves, and the on-off valve 52 of the on-off valve device 13 of the partial path D and the on-off valve 51 of the on-off valve device 12 of the partial path B are the second on-off valves.

When disassembling or discarding the automobile due to deterioration or the like, by closing the on-off valves 51 and 52 of the on-off valve devices 11 to 16 and separating these on-off valves 51 and 52 as described above, All the partial paths AF are divided into
The heat exchanger 3, the compressor 5, and the second heat exchanger 6 are separated from other refrigerant devices while the open / close valves 51 and 52 are connected to the upstream side and the downstream side in the refrigerant flowing direction, respectively, and are separated from the automobile. Further, partial paths B, D, F other than the partial paths A, C, E provided with the first heat exchanger 3, the compressor 5, and the second heat exchanger 6
Also take it out of the car. That is, from the vehicle equipped with the air conditioner 1, the refrigerant circulation path 2 is divided into six partial paths A to
Divide into E and take out. After that, the partial paths A to F are carried to a refrigerant recovery site installed in a place other than the dismantling and disposal place of the automobile, and the operation of recovering the refrigerant from the partial paths A to F is performed.

This refrigerant recovery operation is performed in each partial path A.
A refrigerant recovery device is connected to the on-off valve 51 or 52 of ~ F,
This is done by opening the on-off valve to which this device is connected. The recovered refrigerant is stored in a storage item such as a cylinder or a tank, and then filled in another heat exchange device for reuse, or
Destroyed by chemical treatment.

As described above, according to the present embodiment, in the refrigerant circulation path 2 in which a plurality of refrigerant devices are arranged in series, the upstream and downstream sides of the refrigerant devices such as the first heat exchanger 3 in the refrigerant flow direction. Since the on-off valves 51 and 52 are provided in
After 2 is closed, the refrigerant device can be taken out from the automobile by dividing it from the other refrigerant devices while keeping the refrigerant inside, on the upstream side and the downstream side of the on-off valves 51 and 52 in the refrigerant flow direction. Even if the refrigerant device to be taken out has the opening / closing valves 51 and 52, since the refrigerant device is smaller than the entire air conditioner 1, it is easy to handle when carrying it to the refrigerant recovery place. Become.

Further, the refrigerant circulation path 2 is composed of a plurality of partial paths A to F divided by the opening / closing valve, and the adjacent partial paths are connectable and separable. Therefore, when the refrigerant device is taken out from the automobile. In addition, this refrigerant device can be easily separated from other refrigerant devices and taken out, and each partial path can be carried to the refrigerant recovery place in a separated state to recover the refrigerant from each partial path.

Further, since the adjacent partial passages can be connected and separated by the opening / closing valves provided respectively, the refrigerant can be confined in each partial passage by the opening / closing valve, and the adjacent portions can be connected by the opening / closing valve. Since the passages can be connected and separated, and the on-off valve also serves as a connecting tool, the circuit configuration of the refrigerant circulation passage can be simplified accordingly.

All or a part of the partial roads A to F taken out of the automobile are still in a usable state, and other automobile air conditioners to which the open / close valves 51 and 52 at both ends of the usable partial roads can be connected. If there is, the partial path is connected to the refrigerant circulation path of the automobile air conditioner while the on-off valves 51 and 52 at both ends of the partial path are closed, and the refrigerant device of the partial path is connected to the refrigerant circulation path. Reuse as part of the refrigerant equipment in the road. That is, for example, when the compressor 5 of the partial path C is in a usable state, the compressor 5 is assembled in the refrigerant circulation path of another automobile air conditioner by using the opening / closing valves 51 and 52 of the partial path C, After that, the open / close valves 51 and 52 are opened.

According to this, not only the refrigerant but also the refrigerant device of the automobile air conditioner 1 can be reused.

The refrigerant device in the partial road taken out from the automobile is in a usable state, but when the refrigerant contained in the refrigerant device is already prohibited and cannot be reused, After collecting the passing refrigerant from the partial path, this refrigerant device is incorporated into the refrigerant circulation path of another automobile air conditioner using the opening / closing valves 51 and 52, and only this refrigerant device is reused.

At this time, the on-off valves 51, 52 serve as a connecting tool for incorporating a refrigerant device in the refrigerant circulation path of another automobile air conditioner.

FIGS. 5 and 6, and FIGS. 7 and 8 show an on-off valve device according to another embodiment which replaces the on-off valve devices 11 to 16.

The on-off valve device 70 shown in FIGS. 5 and 6 is also connected,
It is composed of two separable on-off valves 71 and 72, and refrigerant flow passages 73 and 74 are formed inside these on-off valves 71 and 72. In the valve body 75 of the opening / closing valve 71, the connecting pipes 21 to
The flare ends of 25 and 33 are provided with a male screw portion 75A which is joined by a flare nut 76, and the inside of the valve body 75 is guided by a guide groove 77 in a direction perpendicular to the refrigerant flow passage 73 to move. A freely-thick plate-shaped valve member 78 is incorporated, and a screw hole 78A formed in the valve member 78.
The screw shaft 80 whose axial movement is blocked by the projections 80A and 80B is screwed into the lid 79 of the valve body 75, and the screw shaft 8
A rotary knob 81 is attached to the end protruding from the lid 79 of No. 0. By operating the knob 81 in the forward and reverse directions, the valve member 78 reciprocates to close and open the refrigerant flow passage 73, and the on-off valve 71 is opened and closed.

The valve body 82 of the on-off valve 72 is provided with a female screw portion 82A into which a bolt 83 is screwed and coupled. The bolt 83 is connected with connecting pipes 31 to 35, and the inside of this connecting pipe is It communicates with the refrigerant flow passage 74 through the internal passage of the bolt 83.

A tubular member 84 to be operated is slidably arranged on the outer periphery of the valve body 82 of the on-off valve 72.
Is constantly urged toward the on-off valve 71 side by the spring 85 until it comes into contact with the stopper 86. On the inner peripheral portion of the tubular member 84, a projection 84A whose surface on the opening / closing valve 71 side is inclined is formed.
A hole 87 having a tapered shape is formed on the inside of the valve body 82 at a position corresponding to the position of the protrusion 84A when 4 is in contact with the stopper 86, and the ball 88 is inserted into the hole 87. ing. Further, the valve body 7 of the opening / closing valve 71
5 has a protrusion 75B in which a groove 75C into which the ball 88 can be fitted is formed on the outer peripheral surface and the refrigerant flow passage 73 is provided inside.

In the refrigerant flow passage 74 of the opening / closing valve 72, the spring 8
A valve member 90 that is constantly urged toward the on-off valve 71 is disposed at 9, and the valve member 90 that abuts the valve seat 74A by the spring 89 to close the on-off valve 72 is an extension portion that extends toward the on-off valve 71 side. 90
Equipped with A. The spring 89 is received by the spring receiving member 91,
The spring receiving member 91 and the extending portion 90A are formed with holes 91A and 90B through which a refrigerant can flow.

After the tubular member 84 is slid backwards against the spring 85, as shown in FIG. 6, the projection 75B of the valve body 75 of the on-off valve 71 is enlarged at the front end of the refrigerant flow passage 74 of the on-off valve 72. When the tubular member 84 is slid forward by the spring 85 until it abuts against the stopper 86, the ball 88 pressed by the protrusion 84A fits into the groove 75C. Connected. At this time, the valve member 9 of the on-off valve 72
The extension portion 90A of 0 is the protruding portion 7 of the valve body 75 of the on-off valve 71.
Since the on-off valve 72 is opened by being pressed by 5B and then retracted, the valve member 78 of the on-off valve 71 is then retracted from the refrigerant flow passage 73 by the knob 81 to open the on-off valve 71.
3,74 communicate.

When the on-off valve 71 and the on-off valve 72 are separated, the valve member 78 of the on-off valve 71 is picked up 81 to remove the refrigerant flow passage 7.
After closing the on-off valve 71 by advancing to the 3 side and blocking the refrigerant flow passage 73 with the valve member 78, the tubular member 84 is slid backward and then the on-off valve 72 is pulled away from the on-off valve 71. The ball 88 escapes from the groove 75C and the on-off valve 71 and the on-off valve 72 are separated. At this time, the on-off valve 72
Since the valve member 90 comes into contact with the valve seat 74A by the urging force of the spring 89, the opening / closing valve 72 is automatically closed.

In the on-off valve device 70 according to this embodiment, too,
Similar to the on-off valve devices 11 to 16 described above, the refrigerant circulation path of the air conditioner for automobiles is divided into a plurality of partial paths in which the refrigerant is enclosed, and the refrigerant is recovered from these partial paths. You can work. In particular, according to this embodiment, when the opening / closing valve 71 and the opening / closing valve 72 are separated and connected, the opening / closing valve 72 can be automatically opened / closed. When recovering the refrigerant from the partial path where the on-off valve 72 is provided at the end through the on-off valve 72, the recovery end of the refrigerant recovery device has the same shape as the protruding portion 75B of the on-off valve 71. By doing this, the recovery end is opened and closed by the open / close valve 72.
The open / close valve 72 can be opened.

The on-off valve device 1 according to the embodiment of FIGS. 7 and 8
00 is composed of two on-off valves 101 and 102 which can be connected and separated. The on-off valve 102 is different from the on-off valve 72 of the on-off valve device 70 only in that the extending portion 90C of the valve member 90 has a smaller diameter than the extending portion 90A of the on-off valve 72. Is the same as the on-off valve 72, the reference numerals of constituent members such as the valve body are shown in the drawings with the same reference numerals in FIGS. 6 and 7, and the description of the structure of the on-off valve 102 is omitted.

The on-off valve 101 in which the refrigerant flow passage 103 is formed has an external thread portion 101A to which the flare ends of the connecting pipes 21 to 25 and 33 are joined by the flare nut 104, and the refrigerant flow passage 103. Is provided with a valve member 106 that is biased by a spring 105 toward the opening / closing valve 102 and abuts against the valve seat 103A to close the opening / closing valve 101, and a refrigerant can flow through a spring receiving member 107 that receives the spring 105. The hole 107A is formed. Further, a groove 101B into which the ball 88 of the on-off valve 102 can be fitted is formed on the outer peripheral surface of the on-off valve 101.

Also in this embodiment, after the tubular member 84 of the on-off valve 102 is slid backward, as shown in FIG.
When the tip portion of No. 1 is inserted into the tip portion enlarged portion of the refrigerant flow passage 74 of the on-off valve 102 and the tubular member 84 is slid forward until it abuts the stopper 86 by the spring 85, the ball 88 pressed by the protrusion 84A. Fits into the groove 101B, the on-off valve 101 and the on-off valve 102 are connected. When the tubular member 84 is slid backward and the on-off valve 102 is pulled away from the on-off valve 101, the ball 88 escapes from the groove 101B and the on-off valve 101 and the on-off valve 102 are separated.

When the on-off valve 101 and the on-off valve 102 are connected in this way, the extending portion 90 of the valve member 90 of the on-off valve 102.
C presses the valve member 106 of the on-off valve 101, and these valve members 90 and 106 resist the springs 89 and 105 to the valve seat 74.
Since it retreats away from A and 103A, both on-off valves 1
01 and 102 open. Further, the on-off valve 101 and the on-off valve 10
When the two are separated, the valve members 90, 106 are spring 8
Since the valve seats 74A and 103A come into contact with the valve seats 9 and 105, both the on-off valves 101 and 102 are closed.

Also in the on-off valve device 100 of this embodiment, like the above-mentioned on-off valve devices 11 to 16, the refrigerant circulation passage of the automobile air conditioner is divided into a plurality of partial passages in which the refrigerant is enclosed. Alternatively, operations such as recovering the refrigerant from these partial paths can be performed. Particularly, according to this embodiment, when the opening / closing valve 71 and the opening / closing valve 72 are separated and connected, both opening / closing valves 101 and 102 can be automatically opened / closed.

The on-off valve device of each embodiment described above is
It consisted of two on-off valves, and the on-off valves were provided at both ends of all the partial paths A to F. However, the on-off valve device is connected to this one on-off valve and can be separated. And the partial connection parts A to F
Among these, partial passages in which a large amount of refrigerant is stored, for example, open / close valves are provided at both ends of the partial passages A, C, and E of FIG. 2, and the other partial passages B, D, and both ends are connected. You may make it provide a tool.

[0065]

According to the present invention, the heat exchange device can be easily handled when performing work such as refrigerant recovery, and the work can be facilitated.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a refrigerant circulation path of a vehicle air conditioner that is a heat exchange device.

FIG. 2 is a view showing a case where the refrigerant circulation path of FIG. 1 is divided into a plurality of partial paths.

FIG. 3 is a cross-sectional view showing a case where two on-off valves of an on-off valve device interposed between the partial paths are separated.

FIG. 4 is a cross-sectional view showing a case where the two open / close valves of FIG. 3 are connected.

FIG. 5 is a view similar to FIG. 3 showing an opening / closing valve device according to another embodiment.

6 is a view similar to FIG. 4 showing the on-off valve device of FIG.

FIG. 7 is a view showing an opening / closing valve device according to another embodiment.
It is a figure similar to.

8 is a view similar to FIG. 4 showing the on-off valve device of FIG. 7.

[Explanation of symbols]

1 Air conditioner for automobiles that is a heat exchange device 2 Refrigerant circuit 3 First heat exchanger 5 compressor 6 Second heat exchanger 11-16,70,100 Open / close valve device 21-25, 31-36, 43 Connection pipe 51,52,71,72,101,102 open / close valve A to F partial road

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F25B 41/04 F25B 41/00 F25B 45/00 B60H 1/32 613

Claims (2)

(57) [Claims] 1. A first heat exchanger, a second heat exchanger, and a compressor, which are connected in series as a refrigerant device in a refrigerant circulation path in which a refrigerant compressed and fed by the compressor circulates. An on-off valve is provided in the refrigerant circulation path on the upstream side and the downstream side in the refrigerant flow direction with respect to at least one refrigerant device of the first heat exchanger, the second heat exchanger, and the compressor. And the refrigerant circuit is
It consists of multiple sub-paths separated by open / close valves,
The on-off valve was provided on the upstream side and the downstream side in the medium flow direction.
The partial path including the refrigerant device and these opening / closing valves is
Can be separated from other sub-paths adjacent to
And the on-off valve is the first on-off valve.
The other partial path adjacent to the partial path including the on-off valve
A second on-off valve is provided at the end of the first on-off valve side of the
The first on-off valve and the second on-off valve can be connected and separated.
That the partial road is in contact with the other partial road.
Continuing, a processing method for processing the heat exchange device that can be separated
And closing each of the first on-off valve and the second on-off valve
After that, the first opening / closing valve is provided on the upstream side and the downstream side in the refrigerant flow direction.
These first on-off valves connect the installed refrigerant device.
Continuing to separate the first on-off valve and the second on-off valve
More separated from the other partial path, taken out, after this,
The refrigerant taken out with the first on-off valve connected
A method for treating a heat exchange device, which comprises recovering a refrigerant from a device. 2. A first heat exchanger, a second heat exchanger, and a compressor, which are connected in series as a refrigerant device in a refrigerant circulation path in which a refrigerant compressed and fed by the compressor circulates. An on-off valve is provided in the refrigerant circulation path on the upstream side and the downstream side in the refrigerant flow direction with respect to at least one refrigerant device of the first heat exchanger, the second heat exchanger, and the compressor. And the refrigerant circuit is
It consists of multiple sub-paths separated by open / close valves,
The on-off valve was provided on the upstream side and the downstream side in the medium flow direction.
The partial path including the refrigerant device and these opening / closing valves is
Can be separated from other sub-paths adjacent to
And the on-off valve is the first on-off valve.
The other partial path adjacent to the partial path including the on-off valve
A second on-off valve is provided at the end of the first on-off valve side of the
The first on-off valve and the second on-off valve can be connected and separated.
That the partial road is in contact with the other partial road.
Continuing, a processing method for processing the heat exchange device that can be separated
And closing each of the first on-off valve and the second on-off valve
After that, the first opening / closing valve is provided on the upstream side and the downstream side in the refrigerant flow direction.
These first on-off valves connect the installed refrigerant device.
Continuing to separate the first on-off valve and the second on-off valve
More separated from the other partial path, taken out, after this,
The refrigerant taken out with the first on-off valve connected
The device is connected to these first on-off valves and has a refrigerant inside.
As it remains, assembled as a refrigerant device for other heat exchange devices
After this, form the refrigerant circuit of this other heat exchange device.
The first on-off valve is opened to open the refrigerant device and the refrigerant.
A method for treating a heat exchange device, characterized in that the heat is reused .