JPH08114365A - Refrigerant recovering device - Google Patents

Abstract

PURPOSE: To perform efficient recover of refrigerant by a refrigerant recovering device for recovering refrigerant from a collected device by a method wherein variation in amount of refrigerant recovered and also variation in recovering time according to the ambient air temperature are prevented. CONSTITUTION: In a refrigerant recovering device in which refrigerant fed from a collected device A is passed through an evaporator 7, gasified and then compressed by a compressor 11, condensed, liquified by a condensor 14 and stored in a container 21, there are provided a variable setting pressure switch 23 and an ambient air temperature sensor 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant recovery device for recovering a refrigerant from a recovery target device such as an air conditioner or a refrigerator and storing it in a container.

[0002]

2. Description of the Related Art Most of the CFCs conventionally used as refrigerants in air conditioners and refrigerators have been released into the atmosphere.

However, according to recent theories, it is considered that the amount of ultraviolet rays that reach the earth from the sun increases due to the destruction of the ozone layer by the chlorofluorocarbon, which promotes global warming.

Along with this, there is an increasing demand for restricting the release of CFCs into the atmosphere, and there is a demand for a refrigerant recovery device that can efficiently recover the refrigerant from the air conditioner, the refrigerator, or the like. Has been done.

A conventional refrigerant recovery device will be described below with reference to FIG. In FIG. 2, reference numeral 1 denotes a connecting portion connected to the refrigerant-to-be-recovered object A such as an air conditioner, which is a hose for taking in the refrigerant of the refrigerant-to-be-recovered object A. Reference numeral 2 is a filter for preventing the inflow of impurities from the material to be recovered A. Reference numeral 3 is a pressure switch for stopping the operation of the refrigerant recovery device when the recovery is completed. Reference numeral 4 is a pressure gauge for displaying the pressure inside the object to be recovered. Reference numeral 5 is a dryer for removing the water content of the recovered refrigerant. Reference numeral 6 is a capillary tube for decompressing the gas-liquid mixed refrigerant discharged from the object to be recovered A. Reference numeral 7 is an evaporator for vaporizing the refrigerant decompressed by the capillary tube 6. Reference numeral 8 denotes an oil separator, which separates the oil component in the refrigerant. A check valve 9 serves to prevent the high-pressure side refrigerant of the compressor 11 from flowing into the object A to be recovered when the recovery is completed. An accumulator 10 is a tank for preventing the liquid refrigerant from entering the compressor 11. Reference numeral 11 denotes a compressor for collecting and compressing a gaseous refrigerant flowing from the suction port and discharging it as a high-temperature high-pressure gas from the discharge port. Reference numeral 12 is an oil separator for separating refrigerating machine oil discharged from the compressor 11. Reference numeral 13 is a return line for returning the oil component separated by the oil separator 12 to the inlet of the compressor 11. Reference numeral 14 denotes a heat exchanger, which is a condenser that liquefies the gas refrigerant compressed by the compressor 11. Reference numeral 15 denotes a fan, which is for blowing air to the surface of the condenser 14 in order to radiate the heat of the refrigerant passing through the condenser 14. 1
A fan motor 6 is for rotating the fan 15. A check valve 17 is provided to prevent the liquid refrigerant filled in the refrigerant recovery cylinder 21 from being vaporized and flowing back to the condenser 14 side. Reference numeral 18 is a pressure gauge for displaying the pressure inside the recovery cylinder. Reference numeral 19 is a safety valve for automatically discharging the pressure in the recovery cylinder when the pressure in the recovery cylinder rises abnormally. Reference numeral 20 is a hose that connects the recovery device body and the refrigerant recovery cylinder. Reference numeral 21 is a refrigerant recovery cylinder for storing a liquid refrigerant. Reference numeral 22 is a weight scale for managing the weight of the refrigerant recovered from the object A to be recovered by mounting the refrigerant recovery cylinder 21.

[0006]

However, in the above-mentioned conventional configuration, since the completion of recovery is determined by the pressure switch 3, even the same object to be recovered may be recovered depending on the ambient temperature at the time of recovery. Efficient recovery cannot be performed due to variations in time and recovery amount.

That is, when the outside air temperature is low, the collection time is short but the collection amount is small. When the outside air temperature is high, the collection amount is large, but the collection time is long.

The present invention solves the above-mentioned conventional problems, and provides a refrigerant recovery device that changes the recovery completion pressure depending on the temperature of the outside air to enable efficient recovery.

[0009]

In order to solve the above problems, the present invention provides a refrigerant recovery apparatus having a pressure switch whose setting can be changed depending on the condition of the outside air temperature.

[0010]

According to the refrigerant recovery device having the above-mentioned structure, the recovery pressure can be appropriately set depending on the temperature of the outside air, and a stable amount of the refrigerant can be recovered from the object to be recovered, so that the refrigerant can be efficiently recovered.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A refrigerant recovery device according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, 1 is a charge hose,
2 is a filter, 4 is a pressure gauge, 5 is a dryer, 6 is a capillary tube, 7 is an evaporator, 8 is an oil separator, 9
Is a check valve, 10 is an accumulator, 11 is a compressor, 1
2 is an oil separator, 13 is a return line, 14 is a condenser, 15 is a fan, 16 is a fan motor, 17 is a check valve, 18 is a pressure gauge, 19 is a safety valve, 10 is a hose, 21
Is a refrigerant recovery cylinder, and 22 is a weight scale, which has the same configuration and function as those shown in FIG. Further, it is provided with a clocking means for measuring the elapsed time from the start of collection. Reference numeral 23 denotes a variable pressure switch, which is installed at the same position as the pressure switch 3 shown in FIG. An outside air temperature detector 24 that measures the ambient temperature in which the refrigerant recovery device is placed is also installed.

In the refrigerant recovery device having the above-mentioned structure, an appropriate recovery completion pressure is determined by the display of the outside air temperature detector 24, and the variable pressure switch 23 is set to that value.
Set. Then, even if the outside air temperature fluctuates, a certain amount of refrigerant can be recovered, and efficient recovery becomes possible.

The setting method of the set pressure variable switch 23 is such that the output signal of the outside air temperature detector 24 is used to change the setting of the set pressure variable switch 23 to an appropriate value to automatically and efficiently recover the set pressure. It is also possible to do

[0015]

As is apparent from the above description, the present invention can prevent the recovery amount of the refrigerant and the recovery time from varying depending on the temperature of the outside air, and can efficiently recover the refrigerant.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a refrigerant recovery device as an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a conventional refrigerant recovery device.

[Explanation of symbols]

 A Recovery device 1 Hose 2 Filter 3 Pressure switch 4 Pressure gauge 5 Dryer 6 Capillary tube 7 Evaporator 8 Oil separator 9 Check valve 10 Accumulator 11 Compressor 12 Oil separator 13 Return line 14 Condenser 15 Fan 16 Fan motor 17 Check valve 18 Pressure gauge 19 Safety valve 20 Hose 21 Recovery cylinder 22 Weight scale 23 Adjustable pressure switch 24 Outside temperature detector

Claims (1)

[Claims] 1. A connection part for connecting to a recovery target object storing a refrigerant, a vaporization part for vaporizing the recovered refrigerant, a compressor for compressing the refrigerant, and a refrigerant discharged from the compressor. In a refrigerant recovery device made up of a condensing part and a container part for storing condensed liquid refrigerant, a pressure switch capable of changing the setting in the vaporization part and a temperature detector for measuring an ambient temperature in which the refrigerant recovery device is placed Refrigerant recovery device having.