CN107188106A - Refrigerating oil replacing device for fully-enclosed compressor of refrigerating cycle system - Google Patents

Abstract

The invention discloses a refrigerating oil replacing device of a fully-closed compressor of a refrigerating circulation system, wherein the fully-closed compressor surrounds a closed chamber with a high-pressure end and a low-pressure end, and comprises an input pipeline communicated with the closed chamber from the low-pressure end and an output pipeline communicated with the closed chamber from the high-pressure end. The frozen oil replacing device comprises an inflation operation pipeline which is communicated with the closed cavity and used for inflating, and a drainage pipeline which is communicated with the closed cavity, and when the inflation operation pipeline inflates air, the deteriorated frozen oil in the closed cavity can be discharged from the drainage pipeline under pressure.

Description

Refrigerant oil replacement device for hermetic compressor in refrigeration cycle system

technical field

The invention relates to maintenance equipment for a fully enclosed compressor, in particular to a refrigeration oil replacement device for a fully enclosed compressor in a refrigeration cycle system.

Background technique

Referring to Fig. 1, it is an existing fully hermetic compressor 9, which is usually used as refrigeration equipment, or cooling and electronic component testing equipment for semiconductor manufacturing lines, which includes a housing 91, a housing 91 A refrigerant return pipeline 92 at the low-pressure end, a motor 93 provided in the casing 91 and used to provide power for compressing the refrigerant, and a refrigerant output pipeline 94 at the high-pressure end. When the fully-hermetic compressor 9 is in operation, refrigeration oil must be added inside to lubricate the motor 93 and other running parts, so that the fully-hermetic compressor 9 can run smoothly.

Referring to FIG. 2 , the hermetic compressor 9 works with a condenser 81 , a refrigerant controller 82 , and an evaporator 83 . The fully enclosed compressor 9 is used to compress and output the refrigerant into a high-temperature and high-pressure gas, and the condenser 81 dissipates heat from the high-temperature and high-pressure gas into a low-temperature and high-pressure gas, and makes the gas continue to be transported to the refrigerant controller 82; The controller 82 produces a decompression effect, so that the gas is sent to the evaporator 83 for evaporation and heat absorption, and then forms a low-temperature and low-pressure gas, and then returns to the hermetic compressor 9 to complete a refrigeration cycle.

However, the refrigeration oil required for the operation of the fully hermetic compressor 9 will deteriorate under long-term use, especially when used in the performance test of electronic components, because high temperature tests and low temperature tests need to be performed separately, under the condition of thermal shock , it is bound to accelerate deterioration and pollution, and then affect its lubrication effect and capillary blockage, which will directly shorten the life of the hermetic compressor 9, so it must be replaced regularly in order to make the hermetic compressor 9 run smoothly and prolong service life.

The way to update the deteriorating refrigerant oil of the hermetic compressor 9 usually requires cumbersome dismantling operations to disassemble the low-pressure end refrigerant input pipeline 92 and the high-pressure end refrigerant output pipeline 94, and the entire hermetic compressor must be turned over. 9 to pour out the deteriorated refrigeration oil, and even to clean up the disassembled pipeline sections. After the dismantling and cleaning operations are completed, the low-pressure end refrigerant input pipeline 92 and the high-pressure end refrigerant output pipeline 94 must be re-welded and assembled, and the fully-hermetic compressor 9 that has been assembled must be refilled with refrigerant. And refrigerating oil, could make hermetic compressor 9 recover normal operation. The above-mentioned dismantling and cleaning operations are not only time-consuming and complicated, but also require a relatively high cost of manpower and material resources. Therefore, for the maintenance of the hermetic compressor 9, it is necessary to have a more convenient way to replace the refrigeration oil.

Contents of the invention

The object of the present invention is to provide a refrigerating oil replacement device for a fully hermetic compressor in a refrigerating cycle system that can replace refrigerating oil without dismantling the pipeline.

To achieve the above object, the present invention adopts the following technical solutions:

The refrigerating oil replacement device of the fully enclosed compressor of the refrigeration cycle system of the present invention, the fully enclosed compressor surrounds a closed chamber with a low-pressure end and a high-pressure end, and includes an input connected from the low-pressure end to the sealed chamber pipeline, and an output pipeline connected from the high pressure end to the sealed chamber, the output pipeline includes a compression working section extending into the sealed chamber. When the hermetic compressor is in operation, the refrigerant mixed with refrigerated oil is output from the output pipeline to the condenser, then enters the evaporator through the refrigerant controller, and then flows back to the closed chamber through the input pipeline.

The refrigerating oil replacement device comprises an air charging operation pipeline communicated with the sealed chamber and used for charging the sealed chamber with air, and a drainage pipeline communicated with the sealed chamber. The refrigerant oil in the hermetic compressor penetrates into many moving parts to provide lubrication. When the fully hermetic compressor is shut down and the pressurized gas is input from the charging operation pipeline, the deteriorated refrigerating oil in the closed chamber will be under pressure and flow into the drainage pipeline, and then be discharged through the drainage pipeline . When the deteriorated refrigerating oil in the airtight chamber is successfully discharged, new refrigerating oil and refrigerant can be refilled from the air charging operation pipeline to complete the replacement of refrigerating oil, so that the hermetic compressor can continue to operate smoothly.

The effect of the present invention is that by using an additional drainage pipeline, the pressurized gas can be input from the inflation operation pipeline, and the degraded refrigerating oil in the closed chamber can be pushed by the gas pressure, so that the degraded refrigerating oil can completely self-drain. No need to disassemble any pipeline, and then add new refrigeration oil from the inflation operation pipeline to complete the replacement of refrigeration oil.

Description of drawings

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein:

Fig. 1 is the structural representation of existing hermetic compressor;

Fig. 2 is a schematic diagram of the operation mode of a hermetic compressor;

Fig. 3 is the schematic diagram of the first embodiment of the refrigerating oil replacement device of the hermetic compressor of the refrigerating cycle system of the present invention;

Fig. 4 is the implementation schematic diagram of the first embodiment;

Fig. 5 is the schematic diagram of the second embodiment of the refrigerating oil replacement device of the hermetic compressor of the refrigerating cycle system of the present invention; and

Fig. 6 is a schematic diagram of the third embodiment of the refrigeration oil replacement device of the hermetic compressor of the refrigeration cycle system according to the present invention.

【Symbol Description】

1 Refrigerating oil replacement device 11 Air charging operation pipeline 12 Input valve 13 Output valve

14 drainage line 141 window 15 switch valve 16 pressure pump

17 Extraction mechanism 2 Hermetic compressor 200 Hermetic chamber 201 Low pressure end

202 High pressure side 21 Input pipeline 22 Output pipeline 220 Gas outlet

221 Compression section 23 Electric motor 231 Compression cylinder 31 Condenser

32 Refrigerant controller 33 Evaporator 4 Oil sump

detailed description

Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same numerals.

Referring to Fig. 3, it is a first embodiment of the refrigerating oil replacement device 1 of the hermetic compressor of the refrigerating cycle system of the present invention, the hermetic compressor 2 surrounds a hermetic chamber with a low-pressure end 201 and a high-pressure end 202 The chamber 200 includes an input pipeline 21 connected from the low pressure end 201 to the closed chamber 200, an output pipeline 22 connected from the high pressure end 202 to the closed chamber 200, and an electric motor 23 for providing compression power. The output pipeline 22 includes a compression working section 221 extending into the airtight chamber 200 , and the compression working section 221 has an air outlet 220 connected to a compression cylinder 231 of the motor 23 . The first embodiment includes an inflatable operation pipeline 11 communicating with the sealed chamber 200 and used to inject gas into the sealed chamber 200, an input valve 12 arranged in the input pipeline 21, and a valve arranged in the output pipeline 22. An output valve 13 , a drainage pipeline 14 communicating with the sealed chamber 200 , and a switch valve 15 arranged in the drainage pipeline 14 . Among them, the input pipeline 21 is used to input refrigerant and refrigerating oil, while the output pipeline 22 is used to output the refrigerant compressed by the hermetic compressor 2; the input valve 12 and the output valve 13 are used to control the input pipeline respectively. 21 and the connection of the output pipeline 22 or not.

When it is desired to replace the deteriorated refrigerating oil used in the hermetic compressor 2, after the input valve 12 and the output valve 13 are closed, the air charging operation pipeline 11 can be inflated and pressurized, thereby generating air pressure on the airtight chamber 200, The degraded refrigerating oil is made to flow into the drainage pipeline 14 . Then, as long as the on-off valve 15 is opened, the degraded refrigeration oil flowing into the drainage pipeline 14 from the sealed chamber 200 will be discharged through the drainage pipeline 14 and drip into an oil tank 4 for centralized treatment. Wherein, the drainage pipeline 14 includes a transparent window 141 for observing the flow condition of the refrigerating oil in the drainage pipeline 14 . When the deteriorating refrigerating oil in the drainage pipeline 14 is successfully discharged, new refrigerating oil and refrigerant can be refilled from the charging operation pipeline 11 to complete the replacement operation of the refrigerating oil, so that the hermetic compressor 2 can continue to operate smoothly.

Referring to FIG. 4 , it is a case where a condenser 31 , a refrigerant controller 32 , and an evaporator 33 work together in the first embodiment. The fully-hermetic compressor 2 is used to compress the refrigerant and output high-temperature and high-pressure gas, while the condenser 31 dissipates heat from the high-temperature and high-pressure gas into low-temperature and high-pressure gas, and makes the gas continue to be transported to the refrigerant controller 32; the refrigerant control The device 32 produces a decompression effect, so that the gas is transported to the evaporator 33 for evaporation and heat absorption to form a low-temperature and low-pressure gas, and then returns to the hermetic compressor 2 to complete a refrigeration cycle.

Referring to Fig. 5, it is a second embodiment of the refrigerating oil replacement device 1 of the hermetic compressor of the refrigerating cycle system of the present invention. The difference between the second embodiment and the first embodiment is that the second embodiment also includes a Inflate the pressure pump 16 of the operating line 11 . Since the refrigerant oil in the airtight chamber 200 penetrates into many moving parts to provide lubrication, it may not be completely eliminated by simply using drainage. Therefore, the pressure pump 16 is used to generate a pressure source to push the degraded refrigerated oil in the sealed chamber 200 with a relatively high pressure, so that the remaining degraded refrigerated oil can flow into the drainage pipeline 14 under pressure. Among them, the pressure pump 16 preferably adopts the method of inputting nitrogen gas into the charging operation pipeline 11 to generate a pressure source, so as to prevent the residual gas from affecting the subsequent operation of the hermetic compressor 2 .

Referring to Fig. 6, it is a third embodiment of the refrigeration oil replacement device 1 of the hermetic compressor of the refrigerating cycle system of the present invention, the difference between the third embodiment and the second embodiment is that the third embodiment also includes a connecting Drainage pipeline 14 is used for extracting mechanism 17 for extracting deteriorated refrigerating oil. Wherein, the extraction mechanism 17 may preferably be a vacuum pump or a pump, but it is not limited thereto. Since the extraction mechanism 17 is connected to the relative upstream of the on-off valve 15, when deteriorating refrigerant oil in the airtight chamber 200 is to be removed, in addition to increasing the air pressure from the air-filling operation pipeline 11, the on-off valve 15 can also be closed. , adopt the way of self-draining pipeline 14 to suck the deteriorated refrigerating oil remaining in the closed chamber 200 or even the entire system pipeline. In the third embodiment, the way of pushing from upstream and sucking from downstream is adopted at the same time, so that the deteriorated refrigerating oil in the sealed chamber 200 can be completely removed.

When using the first embodiment to the third embodiment to replace the refrigerating oil of the hermetic compressor 2, it is not necessary to disassemble the input pipeline 21 and the output pipeline 22, and it is not necessary to invert the hermetic compressor 2, That is, the deteriorating refrigerating oil that needs to be replaced in the closed chamber 200 can be successfully removed by using the air pressure difference and pipeline drainage, and new refrigerating oil can be replenished from the air-filled operation pipeline 11 to complete the refrigerating oil replacement operation, which effectively simplifies Refrigerant oil replacement work for hermetic compressor 2.

To sum up, when using the first embodiment to the third embodiment to replace the refrigeration oil of the hermetic compressor 2, it is not necessary to disassemble the input pipeline 21 and the output pipeline 22, and the self-inflating operation can be used. The pipeline 11 inflates and pressurizes the airtight chamber 200, and completely removes the deteriorated refrigerating oil in the airtight chamber 200 by means of pipeline drainage, and after replenishing new refrigerating oil from the air-charging operation pipeline 11, it is easy to Complete the refrigerating oil replacement operation of fully hermetic compressor 2, so can really reach the purpose of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. A refrigeration oil replacement device for a fully hermetic compressor in a refrigerating cycle system. The hermetic compressor surrounds a closed chamber with a low-pressure end and a high-pressure end, and includes a closed chamber connected to the low-pressure end. The input pipeline of the chamber, and an output pipeline connected to the closed chamber from the high pressure end, the output pipeline includes a compression working section extending into the closed chamber; the refrigeration oil replacement device includes: An inflatable operating pipeline communicated with the closed chamber for injecting gas into the closed chamber; and A drainage pipeline communicates with the airtight chamber, and the self-inflating operation pipeline is inflated to make the refrigerated oil in the airtight chamber flow into the drainage pipeline under pressure. 2. The refrigerating oil replacement device of a hermetic compressor in a refrigerating cycle system according to claim 1, further comprising an input valve disposed in the input pipeline, and an output valve disposed in the output pipeline. 3. The refrigerating oil replacement device of the fully-hermetic compressor of the refrigerating cycle system according to claim 1, characterized in that it also includes a switch valve arranged in the drainage pipeline to control whether the drainage pipeline circulates or not. It can make the refrigerated oil discharge from the drainage pipeline. 4. According to claim 1, the refrigerating oil replacement device of the fully hermetic compressor of the refrigerating cycle system is characterized in that it also includes a pressure pump connected to the air charging operation pipeline. When the input valve and the output valve are closed, the pressure pump can generate A pressure source that pushes the refrigerant oil in the closed chamber into the drain line. 5. The refrigerating oil replacement device of a hermetic compressor in a refrigerating cycle system according to claim 1, wherein the drainage pipeline includes a transparent window. 6. The refrigerating oil replacement device of the hermetic compressor of the refrigerating cycle system according to claim 1, further comprising a working valve arranged in the charging operation pipeline. 7. The refrigerating oil replacement device of the fully hermetic compressor of the refrigerating cycle system according to claim 4, wherein the pressure pump generates a pressure source by inputting nitrogen gas into the inflating operation pipeline. 8. The refrigerating oil replacement device of a hermetic compressor in a refrigerating cycle system according to claim 3, further comprising an extracting mechanism connected to the drainage pipeline for extracting refrigerating oil. 9. The refrigerating oil replacement device of a hermetic compressor in a refrigerating cycle system according to claim 8, wherein the extracting mechanism is connected relatively upstream of the on-off valve.