JPH0792298B2 - Refrigerant recovery and regeneration device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant recovery / regeneration device, and more particularly to a refrigerant recovery / regeneration device capable of cooling a refrigerant supplied from a refrigerant recovery / regeneration device to a container.

[0002]

2. Description of the Related Art A conventional refrigerant recovery and regeneration device has a structure as shown in FIG. In the figure, 1 is an inlet operation valve, which is a valve that is connected to a refrigerant recovery device such as a car air conditioner and that takes in a gaseous refrigerant in the refrigerant recovery device. Two
Is a compressor, which is connected to the inlet operation valve 1 by a conduit 3 and compresses a gaseous refrigerant flowing in through the inlet operation valve 1. A condenser 4 is connected to the compressor 2 and liquefies the refrigerant compressed in the compressor 2. A fan 5 sends air to the surface of the capacitor 4 in order to dissipate heat generated in the capacitor 4. A receiver 6 temporarily stores the liquid refrigerant which is liquefied in the condenser 4 and continuously sent out. A dryer 7 is connected to the receiver 6 and cleans the liquid refrigerant sequentially sent from the receiver 6. That is, the dryer 7 removes water, impurities and the like mixed in the liquid refrigerant sent from the receiver 6. An outlet operation valve 8 is connected to the container 9. The outlet operation valve 8 is a valve element that operates the discharge of the refrigerant regenerated into pure refrigerant in the receiver 6. A check valve 10 is provided from the dryer 7 to the outlet operation valve 8
This is to prevent the liquid refrigerant supplied to the container 9 via the backflow from the container 9 to the dryer 7.

Reference numeral 11 is cooling water (or ice) for cooling the container 9 from the outside. This cooling water 11 is stored in the container 9
By lowering the temperature of the refrigerant in the container 9 and decreasing the pressure in the container 9, more of the refrigerant is stored in the container 9.

In the refrigerant recovery / regeneration device constructed as described above, the recovered refrigerant is in a gaseous state and is sucked from the inlet operation valve 1 by the compressor 2 to generate high-pressure and high-temperature gas in the condenser 4
Is discharged. It is cooled by the fan 5 etc. by the condenser 4 and liquefied and enters the receiver 6. Dryer 7
After passing through the column, impurities and the like are removed and regenerated, and then collected in a predetermined container 9 through the outlet operation valve 8.

[0005]

The water- and refrigerant-removed refrigerant mixed in the liquid refrigerant in the dryer 7 is thus poured from the outlet operation valve 8 into the container 9. When the container 9 is poured from the outlet control valve 8, the container 9 is initially evacuated. Therefore, the refrigerant can be easily poured into the container 9 to some extent. However, when the refrigerant starts to flow into the container 9, the inside of the container 9 gradually loses the vacuum state.

Moreover, the temperature of the refrigerant supplied from the dryer 7 is slightly higher than the temperature of the refrigerant supplied from the receiver 6, and the inside of the container 9 is initially in a vacuum state and the atmospheric pressure is low. Some vaporize. For this reason, the inside of the container 9 gradually becomes high in pressure due to the refrigerant flowing therein and the refrigerant vaporized in the container 9, and when the amount of the refrigerant flowing into the container 9 exceeds a certain amount, it becomes difficult for the refrigerant to gradually enter the container 9. Therefore, conventionally, as shown in FIG.
Is cooled by cooling water (or ice) 11,
It is practiced to lower the temperature of the refrigerant in the container 9 and reduce the pressure in the container 9 to store more refrigerant in the container 9.

However, in the conventional refrigerant recovery and regeneration device, in order to store a large amount of refrigerant in the container 9,
In order to lower the temperature of the refrigerant in the container 9 to lower the pressure in the container 9, it is necessary to separately cool the container 9 with cooling water (or ice) 11, and the temperature of the container cooling water (or ice) becomes high. Since it is necessary to frequently take measures such as replacement of the coke, it takes time and effort for the person who uses the refrigerant recovery and regeneration device, and there is a problem in that it is inconvenient to handle.

The present invention does not directly cool the container using the cooling water (or ice), and does not require the trouble of exchanging the cooling water (or ice) and the refrigerant in the container. It is an object of the present invention to provide a refrigerant recovery / regeneration device capable of lowering the temperature and storing a large amount of refrigerant in a container.

[0009]

In order to achieve the above object, the refrigerant recovery and regeneration apparatus of the present invention takes in the refrigerant recovered from the refrigerant recovery target apparatus through an inlet operation valve and compresses it with a compressor, In the refrigerant recovery and regeneration device, the refrigerant compressed by the compressor is condensed by the condenser and supplied to the dryer through the receiver, and after the moisture and impurities in the refrigerant are removed by the dryer, the refrigerant is recovered from the outlet operation valve into the container. A heat exchanger is provided between the dryer and the outlet operation valve, and a part of the refrigerant output from the dryer as the refrigerant of the heat exchanger is supplied via the caterpillar tube.

[0010]

[Function] The compressor continuously sucks the recovered gaseous refrigerant through the inlet operation valve. The recovered refrigerant is compressed by the compressor and continuously discharged as high-pressure and high-temperature gas to the condenser. The collected refrigerant liquefied by the condenser is temporarily stored in the receiver,
Send to the dryer. The dryer removes impurities such as water and regenerates and sends them to the pipeline. Most of the regenerated liquefied refrigerant sent from the dryer to the pipeline passes through the heat exchanger,
Flows to the check valve and outlet control valve. On the other hand, a part of the refrigerant sent from the dryer to the pipeline is branched and flows into the capillary tube. In the capillary tube, the inflowing refrigerant is decelerated and decompressed and supplied to the heat exchanger as the refrigerant of the heat exchanger. In the heat exchanger, the refrigerant supplied via the capillary tube is rapidly vaporized in the heat exchanger. Part of the refrigerant sent from this dryer to the pipeline is
The refrigerant in the heat exchanger is decompressed in the capillary tube and supplied to the heat exchanger. The refrigerant supplied to the heat exchanger via the capillary tube is immediately vaporized in the heat exchanger. In the heat exchanger, the vaporized refrigerant exchanges heat with the refrigerant passing through the heat exchanger, and the vaporized refrigerant that has exchanged heat is discharged to the return pipe. The compressor that sucks the recovered gaseous refrigerant from the inlet operation valve sucks the refrigerant in the heat exchanger discharged to the return pipe together with the recovered refrigerant, compresses it, and continuously compresses it into a condenser as high-pressure and high-temperature gas. Discharge. By repeating this, heat is exchanged with the refrigerant in the heat exchanger, and the refrigerant flowing from the dryer to the check valve and the outlet operation valve is cooled to lower the temperature.

[0011]

EXAMPLES Examples of the present invention will be described below. FIG. 1 shows an embodiment of the refrigerant recovery and regeneration device according to the present invention.

In the figure, 1 is an inlet operation valve, 2 is a compressor, 3 is a conduit, 4 is a condenser, 5 is a fan, 6 is a receiver, 7 is a dryer, 8 is an outlet operation valve, 9 is a container, 10
Is a check valve, which has the same structure as that shown in FIG.

A heat exchanger 12 includes a dryer 7 and a check valve 1.
It is provided between 0 and. The heat exchanger 12 measures the temperature of the refrigerant discharged from the dryer 7 which is slightly higher than the temperature of the refrigerant supplied from the receiver 6,
This is for cooling to at least the temperature of the refrigerant supplied from the receiver 6.

Reference numeral 13 is a capillary tube, which is a dryer 7
And a heat exchanger 12 are connected to each other so as to branch to a pipe line 14, and a part of the refrigerant supplied from the dryer 7 branched at the pipe line 14 supplies a temperature to the heat exchanger 12.
The capillary tube 13 is for decompressing a part of the refrigerant supplied from the dryer 7 branched from the pipeline 14 and vaporizing it in the heat exchanger 12. That is, the capillary tube 13 is used so that the refrigerant supplied as the refrigerant of the heat exchanger 12 is rapidly and surely vaporized in the heat exchanger 12 to fully utilize the function of the refrigerant.

Since the pipe 14 supplies a part of the refrigerant supplied from the dryer 7 to the capillary tube 13 and a large part of the refrigerant supplied from the dryer 7 to the heat exchanger 12, the branch circuit is provided. Are configured. Thus, a part of the refrigerant branched from the pipeline 14 and supplied from the dryer 7 is completely vaporized at the moment when it enters the heat exchanger 12 and acts as a refrigerant, so that the refrigerant in the heat exchanger 12 is vaporized. Reference numeral 15 is a return pipe for cooling the refrigerant supplied from the dryer 7 passing through the heat exchanger 12 to a predetermined temperature by heat, and connects the heat exchanger 12 and the pipe 3. That is, a part of the refrigerant supplied from the dryer 7 is transferred to the capillary tube 13
The refrigerant is supplied to the heat exchanger 12 via the heat exchanger 12 and the refrigerant vaporized in the heat exchanger 12 is returned to the compressor 2.

In the refrigerant recovery / regeneration device having such a configuration, the recovered refrigerant is sucked in a gaseous state from the inlet operation valve 1 by the compressor 2 and discharged to the condenser 4 as a high-pressure and high-temperature gas. The refrigerant compressed by the compressor 2 and supplied to the condenser 4 is liquefied by the condenser 4 and enters the receiver 6. In the condenser 4, heat is generated during liquefaction of the high-pressure high-temperature gas refrigerant by the compressor 2, and the heat generated in the condenser 4 is cooled by the fan 5 and the like, and the high-pressure high-temperature gas refrigerant in the condenser 4 is cooled. Promotes liquefaction.

The refrigerant liquefied in the condenser 4 is temporarily stored in the receiver 6 and supplied to the dryer 7. The liquefied refrigerant regenerated by removing impurities and the like in the dryer 7 is sent to the pipe line 14. Most of the refrigerant regenerated in the dryer 7 and delivered to the pipeline 14 is delivered to the heat exchanger 12. Then, from the dryer 7 to the pipeline 1
A part of the refrigerant sent to the heat exchanger 4 is depressurized in the capillary tube 13 as a refrigerant for the heat exchanger 12 and the heat exchanger 1
2 is supplied. The refrigerant supplied to the heat exchanger 12 via the capillary tube 13 is immediately vaporized in the heat exchanger 12. The vaporized refrigerant exchanges heat with most of the refrigerant sent from the dryer 7 passing through the heat exchanger 12, and is discharged to the return pipe line 15. The refrigerant in the heat exchanger 12 discharged to the return line 15 is sucked into the compressor 2 from the inlet operation valve 1 together with the gaseous recovery refrigerant again. The circuit sucked from the inlet operation valve 1 to the compressor 2 constitutes a suction circuit.

Therefore, according to the present embodiment, a part of the refrigerant discharged from the dryer 7 is branched by the pipe line 14 which is a branch circuit and the heat exchanger 1 through the caterpillar tube 13.
2, a part of the refrigerant that has left the dryer 7 at the portion of the caterpillar tube 13 is decompressed and evaporated (vaporized) in the heat exchanger 12, so that the check valve 10 and the outlet operation valve 8 are discharged from the dryer 7. The refrigerant flowing to the heat exchanger 12
The temperature can be lowered by cooling inside.

Further, according to this embodiment, since the temperature of the refrigerant entering the container 9 from the outlet operation valve 8 is lowered, it is not necessary to separately cool the container 9 as in the conventional case, and the conventional refrigerant recovery / regeneration apparatus is used. It is possible to eliminate inconvenience in handling.

[0020]

Since the present invention is configured as described above, the cooling water (or ice) is replaced without directly cooling the container with the cooling water (or ice). It is possible to store a large amount of refrigerant in the container by lowering the temperature of the refrigerant in the container without such trouble.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit system diagram showing an embodiment of a refrigerant recovery and regeneration device according to the present invention.

FIG. 2 is a refrigerant circuit system diagram showing an embodiment of a conventional refrigerant recovery and regeneration device.

[Explanation of symbols]

1 ……………………………………………… Inlet control valve 2 ………………………………………… Compressor 3 ………………………… ……………… Pipeline 4 ………………………………………… Condenser 6 ………………………………………… Receiver 7 ……………… …………………………… Dryer 8 ………………………………………… Outlet control valve 9 ………………………………………… Container 12 ……………………………………………… Heat exchanger 13 ………………………………………… Capillary tube 14 …………………………………… ……… Pipeline 15 ………………………………………… Return line

Claims (1)

[Claims] 1. A refrigerant recovered from a refrigerant recovery device is taken in via an inlet operation valve and compressed by a compressor, and the refrigerant compressed by the compressor is condensed by a condenser and supplied to a dryer via a receiver. In the refrigerant recovery / regeneration device for removing water and impurities in the refrigerant in the dryer and then recovering it from the outlet operation valve into the container, a heat exchanger is provided between the dryer and the outlet operation valve, and the refrigerant of the heat exchanger is A part of the refrigerant output from the dryer as described above is supplied through a caterpillar tube as a refrigerant recovery / regeneration device.