JPH05231676A - Three-way valve of separate type air conditioner - Google Patents

Abstract

PURPOSE:To enable exhaustion of air remaining in a refrigerant circuit of a separate type air conditioner without releasing fluoro carbon chloride gas refrigerant into air. CONSTITUTION:A refrigerant reservoir passage 16 is provided in a body of a three-way valve 1. In this instance, the passage 16 is so designed that it communicates with a service passage 10 and the communication is cut by a movement of a pin 11. A refrigerant reservoir 15 is provided at the tip end of the passage 16. In the case that air remaining inside an indoor unit and a refrigerant piping is exhausted after the refrigerant piping is connected, by the use of refrigerant in a refrigerant container placed outside, the remaining air is made to stay inside the refrigerant reservoir 15 in the three-way valve 1 together with the refrigerant. As a result, the refrigerant is prevented from being released into the atmosphere.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-way valve in a separation type air conditioner.

[0002]

2. Description of the Related Art In recent years, the emphasis has been placed on the comfort of air conditioning in houses and the exterior of buildings.
Separate air conditioners have been widely used as air conditioners. On the other hand, environmental problems have been taken up as a global problem, and the release of CFCs into the atmosphere, including CFCs emitted during the refrigerant pipe connection work of a separation type air conditioner, has become a major social problem. ..

Conventionally, in this type of separation type air conditioner, an indoor unit and an outdoor unit are connected by a refrigerant pipe, and a CFC gas used as a refrigerant is circulated to carry out a refrigerant bunch. The refrigerant pipe and the outdoor unit having the compressor are connected by using a three-way valve, and the residual air in the indoor unit and the refrigerant pipe after the connection is discharged from the three-way valve by using an external refrigerant. Was common. The configuration will be described below with reference to FIG.

As shown in the figure, the refrigerant circuit of the outdoor unit 101 is composed of a compressor 103, an outdoor heat exchanger 104, a capillary tube 105, and three-way valves 106 and 106a which are connection ports for a refrigerant pipe 107. Has been done. Also,
The refrigerant circuit of the indoor unit 102 includes an indoor heat exchanger 109 and a half union 108 that is a connection port for the refrigerant pipe 107, and the indoor unit 102 and the outdoor unit 101 are connected by the refrigerant pipe 107.

In the above structure, the refrigerant required for the refrigerant circuit is previously sealed inside the refrigerant pipe of the outdoor unit 101,
In the installation work, after the refrigerant pipe connection is completed, the air remaining inside the indoor unit 102 and the refrigerant pipe 107 is supplied to the one-way valve 106, which is the closed state of the outdoor unit 101, into the refrigerant container containing the refrigerant. 112 is connected using a connection hose 113, and the refrigerant that has entered the inside of the refrigerant container 112 is passed through the refrigerant pipe 107, the half union 108, and the indoor heat exchanger 109, and the other side of the outdoor unit 101 is closed. When the open / close pin 115 provided on the service connection port 114 of the three-way valve 106a is pushed, it is released to the outside. Then, when the discharge is completed, the pin 115 is returned, the connection hose 113 connected to the three-way valve 106 is removed, and the three-way valves 106 and 106a are opened, whereby the refrigerant circuits of the outdoor unit 101 and the indoor unit 102 are separated. By communicating through the refrigerant pipe 107, the refrigerant circulation is formed as a separate type air conditioner.

[0006]

In such a conventional three-way valve of a separation type air conditioner, air remaining inside the indoor unit 102 and the refrigerant pipe 107 after the refrigerant pipe connection work is taken from the outside to the refrigerant container 112. In order to discharge the refrigerant from the service connection port 114 of the three-way valve 106a using the refrigerant having the pressure of,
May lead to environmental problems. Further, when the internal air is removed by the vacuum pump (shown in the figure) without using the external refrigerant container 112, a vacuum pump and a power source for operating the vacuum pump are required during the installation work, which is troublesome. There was a problem that it took time.

The present invention solves the above problems, and provides a three-way valve for a separation type air conditioner capable of easily releasing the residual air inside without releasing the CFC gas refrigerant to the atmosphere. To aim.

[0008]

In order to achieve the above object, the present invention provides a pin having a valve connected to a service passage in a main body of a three-way valve, and a service passage formed by opening and closing the valve. A three-way valve of a separation type air conditioner is formed in which a refrigerant reservoir passage communicating with the refrigerant reservoir passage is formed, and a refrigerant reservoir having a predetermined capacity is provided at the tip of the refrigerant reservoir passage.

[0009]

According to the present invention, after the construction for connecting the refrigerant pipes is completed, the air remaining inside is used for the refrigerant from the one-way valve of the outdoor unit by using the external refrigerant container, and the refrigerant pipe and the refrigerant circuit of the indoor unit. The air in the refrigerant circuit can be discharged without discharging the refrigerant into the atmosphere by accumulating it in the refrigerant reservoir provided in the other three-way valve of the outdoor unit.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the inside of the three-way valve 1 is connected to a refrigerant pipe 7, a refrigerant pipe side passage 8 connected by a flare nut 6, and a pipe (not shown) inside the outdoor unit body. Body side passage 9 connected to the body connecting pipe 3 and the pin 1
By the action of 1 and the action of the spring 14, the valve 12 provided at the tip of the pin 11 and the valve seat 13 provided on the main body come into contact with each other or open, so that the refrigerant passage 16 is blocked or communicated with the service passage. 10 is provided. The refrigerant pipe side passage 8 and the main body side passage 9 are blocked by the valve body 2 being in a closed state, and the refrigerant pipe side passage 8 and the service passage 10 are in communication with each other. On the other hand, when the valve main body 2 removes the cap 4, inserts a hexagon wrench (not shown) or the like into the operation hole 5 and turns it into an open state, the refrigerant pipe side passage 8 and the main body side passage 9
The service passage 10 is communicated. A refrigerant reservoir 15 having a certain capacity is provided at the tip of the refrigerant reservoir passage 16.

In FIG. 2, the outdoor unit 24 is the indoor unit 23.
And the refrigerant pipes 21 and 21a, the half unions 22 and 22
a and the three-way valve 1, 20 and is connected to the three-way valve 2
A refrigerant container 18 containing a refrigerant is connected to 0 through a connection hose 19. The three-way valves 1 and 20 are both closed, and the refrigerant enclosed in the refrigerant circuit of the outdoor unit 24 is completely shut off.

In the above structure, the refrigerant contained in the refrigerant container 18 enters the closed three-way valve 20 through the connection hose 19 and is connected by the flare nut 6 from the communicating refrigerant pipe side passage 8. It enters into the refrigerant circuit of the indoor unit 23 through the refrigerant pipe 21 and the half union 22.
After that, the refrigerant pipe 21a passes through the indoor heat exchanger 25 and the half union 22a, and is connected by the flare nut 6 so that the refrigerant pipe passage 8 of the three-way valve 1 in the closed state is connected.
Through the service passage 10 communicating therewith. that time,
By pressing the pin 11, the service passage 10 and the refrigerant reservoir passage 16 communicate with each other, and the residual air is accumulated together with the refrigerant in the inside 15a of the refrigerant reservoir 15 of the refrigerant reservoir 15. Next, when the residual air has accumulated in the inside 15a of the refrigerant reservoir 15, the pin 11 is returned to disconnect the service passage 10 and the refrigerant reservoir passage 16. After that, the connection hose 19 is removed from the three-way valve 20, and the three-way valve 20 and the three-way valve 1 are opened by operating the valve 2, so that the refrigerant circuits of the outdoor unit 24, the indoor unit 23, and the refrigerant pipes 21 and 21a are separated. It is connected and is formed as a separate type air conditioner.

As described above, according to the three-way valve of the separation type air conditioner of the embodiment of the present invention, the refrigerant reservoir passage 16 which is cut off or communicates with the service passage 10 is provided by operating the main body pin 11 of the three-way valve 1. In the case where the refrigerant reservoir 15 having a certain predetermined capacity is provided at the tip thereof, when the air remaining in the refrigerant circuit of the indoor unit 23 and the refrigerant pipes 21 and 21a is discharged at the time of connecting the refrigerant pipes. In addition, the residual air is collected together with the refrigerant in the refrigerant reservoir 15 provided in the three-way valve 1 by using the refrigerant in the external refrigerant container 18, so that the refrigerant in the atmosphere can be released without releasing the refrigerant in the atmosphere. Prevent adverse effects on.

[0015]

As is apparent from the above embodiments, according to the present invention, the body of the three-way valve is provided with the refrigerant reservoir passage which is cut off or communicates with the service passage by the operation of the pin, and is provided at the tip portion thereof. Due to the configuration with a refrigerant reservoir with a predetermined capacity, even when using an external refrigerant to discharge residual air during refrigerant pipe connection work, the three-way valve can be easily used without releasing the refrigerant to the atmosphere. It is possible to provide a three-way valve of a separation type air conditioner that can be stored in the refrigerant reservoir provided in the above, and is effective in countermeasures against environmental problems caused by the release of CFC gas refrigerant into the atmosphere.

[Brief description of drawings]

FIG. 1 is a sectional view of a three-way valve of a separation type air conditioner according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a refrigerant circuit of a separation type air conditioner using a three-way valve of the separation type air conditioner.

FIG. 3 is a partial cross-sectional view of a refrigerant circuit of a separation type air conditioner using a three-way valve of a conventional separation type air conditioner.

[Explanation of symbols]

 1 Three-way valve 10 Service passage 11 Pin 12 Valve 15 Refrigerant reservoir 16 Refrigerant reservoir passage

Claims (1)

[Claims] 1. A three-way valve main body is formed with a pin having a valve connected to a service passage and a refrigerant reservoir passage communicating with the service passage when the valve is opened and closed, and a tip of the refrigerant reservoir passage. A three-way valve for a separation type air conditioner, in which a refrigerant reservoir having a predetermined capacity is provided.