CN111141541A - Movable oil-containing refrigerant testing device and method - Google Patents

Movable oil-containing refrigerant testing device and method Download PDF

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Publication number
CN111141541A
CN111141541A CN202010067214.6A CN202010067214A CN111141541A CN 111141541 A CN111141541 A CN 111141541A CN 202010067214 A CN202010067214 A CN 202010067214A CN 111141541 A CN111141541 A CN 111141541A
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oil
stop valve
lubricating oil
refrigerant
interface
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CN111141541B (en
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谷波
曾炜杰
刘勖诚
沙宇雄
田镇
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00

Abstract

A movable oil-containing refrigerant testing device and method comprises the following steps: the sampling device comprises a main loop assembly, and a sampling section assembly and a bypass branch assembly which are respectively arranged on the main loop assembly. The main loop assembly includes: the invention relates to a test device for a refrigerant containing oil, which comprises an input metal hose, a first stop valve, a pipe-shaped sight glass, a second stop valve, an overheating heater, an oil separator, an oil return heater, an oil return sight glass, an oil return mass flowmeter, a third stop valve, a main oil tank, a fourth stop valve, an auxiliary oil tank with an oil injection heater, an oil injection mass flowmeter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose which are connected in sequence.

Description

Movable oil-containing refrigerant testing device and method
Technical Field
The invention relates to a technology in the field of heat exchange equipment testing, in particular to a movable oil-containing refrigerant testing device and a movable oil-containing refrigerant testing method.
Background
In the refrigeration and air-conditioning industry, a large number of relevant experimental tests are required to solve the performance of air-conditioning products and to optimize the products. The traditional experiment is generally based on a compressor performance test bench and test benches (enthalpy difference test benches of finned tube heat exchangers or micro-channel heat exchangers, single-tube flow heat transfer test benches and the like) of various single-body heat exchangers. The vapor compression type refrigerating system is the most widely used refrigerating system in the refrigerating and air conditioning industry, in the refrigerating cycle, a small part of lubricating oil in a compressor is carried by a refrigerant and enters the system to participate in the cycle, so that a working medium in the system is changed into an oil-containing refrigerant from a pure refrigerant. Therefore, further experimental tests on the relevant properties of oil-containing refrigerants are required.
The testing of oil-laden refrigerants can be largely divided into three areas: the testing confirms the oil content of the working medium in the refrigerating system, tests the influence of the oil-containing refrigerant to the system and the component performance under different oil content, and tests and obtains the amount of the lubricating oil retained in each component. At present, most of the existing formed compressor performance tables and single heat exchanger test tables are directed at pure working media, and the factors of lubricating oil are not considered, so that the tests of the oil-containing refrigerant in the three aspects cannot be carried out.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a movable oil-containing refrigerant testing device and method, which can expand the testing function and realize the related test of the oil-containing refrigerant.
The invention is realized by the following technical scheme:
the invention relates to a movable oil-containing refrigerant testing device, which comprises: the sampling device comprises a main loop assembly, and a sampling section assembly and a bypass branch assembly which are respectively arranged on the main loop assembly.
The main loop assembly comprises: the device comprises an input metal hose, a first stop valve, a pipe-type view mirror, a second stop valve, an overheating heater, an oil separator, an oil return heater, an oil return view mirror, an oil return mass flowmeter, a third stop valve, a main oil tank, a fourth stop valve, an auxiliary oil tank with an oil injection heater, an oil injection mass flowmeter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose which are connected in sequence, wherein: the sampling section assembly and the bypass branch assembly are respectively arranged at the output end of the tubular sight glass, a refrigerant output end of the oil separator is provided with a refrigerant output metal hose, a lubricating oil output end is connected with the input end of the oil return heater, the fourth stop valve is arranged between the main oil tank and the auxiliary oil tank, the oil injection heater and the oil pump are respectively connected with the fifth stop valve at the output end of the auxiliary oil tank and the lubricating oil bypass needle valve at the input end, and the oil pump and the lubricating oil bypass needle valve are respectively connected with the oil injection.
The sampling section assembly comprises: sample stop valve, sample sight glass, the section evacuation of taking a sample that connects gradually fill interface, sample needle valve, sample container and water bath container, wherein: the sampling stop valve is connected with the output end of the tube-shaped sight glass.
The bypass branch assembly comprises: first bypass stop valve and the second bypass stop valve that connects gradually, wherein: the first bypass stop valve is connected with the output end of the tubular sight glass, and the second bypass stop valve is connected with the output end of the oil return mass flow meter.
The invention relates to a device-based test method, which comprises the following steps: the compressor performance test bench comprises an oil content test, a monomer evaporator test and a monomer condenser test.
Technical effects
The invention integrally solves the technical blank of the testing device for pure refrigerant for expanding the test of oil-containing refrigerant. Compared with the prior art, the invention can complete three oil-containing refrigerant test functions of measuring the oil content of the working medium, testing the flow heat transfer and pressure drop performance of the oil-containing refrigerant and measuring the retention of lubricating oil; can be repeatedly used for different experimental devices.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
Fig. 2 is a schematic view of the device frame and fixture.
Fig. 3 is a schematic diagram of the compressor performance test bench.
FIG. 4 is a schematic diagram of an application of the monomer evaporator test unit.
FIG. 5 is a schematic diagram of the application of the monomer condenser test unit.
In the figure: the main circuit assembly 1, the input metal hose 101, the first stop valve 102, the tube-type view mirror 103, the second stop valve 104, the overheating heater 105, the oil separator 106, the refrigerant output metal hose 107, the oil return heater 108, the oil return mirror 109, the oil return mass flow meter 110, the third stop valve 111, the main oil tank 112, the fourth stop valve 113, the auxiliary oil tank 114, the fifth stop valve 115, the oil filling heater 116, the oil pump 117, the lubricant bypass needle valve 118, the oil filling mass flow meter 119, the check valve 120, the oil filling needle valve 121, the lubricant output hose 122, the first vacuum filling port 123, the second vacuum filling port 124, the third vacuum filling port 125, the sampling stop valve 61, the sampling mirror 62, the sampling section vacuum filling port 63, the sampling needle valve 64, the sampling container 65, the water bath container 66, the first bypass stop valve 71, the second stop valve 72, the alloy bracket 21, the bypass filling port 125, the sampling section, The system comprises wheels 22, a compressor 31, a condenser 32, an electronic expansion valve 33, an evaporator 34, an additional stop valve 35, a first connecting interface A3-1, a second connecting interface A3-2, a third connecting interface A3-3, a fourth connecting interface A3-4, a fifth connecting interface B3, a sixth connecting interface C3, corresponding stop valves 351-356, an evaporator 4 to be tested, an additional stop valve 41, a first connecting interface A4, a second connecting interface B4, a third connecting interface C4, corresponding stop valves 42-44, a condenser 5 to be tested, a heating evaporator 51, an additional stop valve 52, a first connecting interface A5-1, a second connecting interface A5-2, a third connecting interface B5, a fourth connecting interface C5 and corresponding stop valves 53-56.
Detailed Description
As shown in fig. 1, the present embodiment relates to a portable oily refrigerant testing device, which includes: the device comprises a main loop assembly 1, and a sampling section assembly 6 and a bypass branch assembly 7 which are respectively arranged on the main loop assembly 1.
The main loop assembly 1 comprises: an input metal hose 101, a first stop valve 102, a pipe-type view mirror 103, a second stop valve 104, an overheating heater 105, an oil separator 106, an oil return heater 108, an oil return view mirror 109, an oil return mass flow meter 110, a third stop valve 111, a main oil tank 112, a fourth stop valve 113, a sub oil tank 114 with an oil filling heater 116, an oil filling mass flow meter 119, a check valve 120, an oil filling needle valve 121, and a lubricating oil output metal hose 122 which are connected in sequence, wherein: the sampling section assembly 6 and the bypass branch assembly 7 are respectively arranged at the output end of the tube-type view mirror 103, a refrigerant output end of the oil separator 106 is provided with a refrigerant output metal hose 107, a lubricating oil output end is connected with the input end of the return oil heater 108, a fourth stop valve 113 is arranged between the main oil tank 112 and the auxiliary oil tank 114, the oil injection heater 116 and an oil pump 117 thereof are respectively connected in parallel between a fifth stop valve 115 at the output end of the auxiliary oil tank 114 and a lubricating oil bypass needle valve 118 at the input end, and the oil pump 117 and the lubricating oil bypass needle valve 118 are respectively connected with.
The sampling segment assembly 6 comprises: sample stop valve 61, sample sight glass 62, the section of taking a sample evacuation fill interface 63, sample needle valve 64, sample container 65 and water bath container 66 that connect gradually, wherein: the sampling cut-off valve 61 is connected with the output end of the tube-type sight glass 103.
The bypass branch assembly 7 comprises: a first bypass cut-off valve 71 and a second bypass cut-off valve 72 connected in series, wherein: the first bypass cut-off valve 71 is connected to the output of the pipe type view mirror 103, and the second bypass cut-off valve 72 is connected to the output of the return oil mass flow meter 110.
The main loop component 1 is further provided with: three evacuation and filling interfaces for evacuation or filling, wherein: the first vacuum filling interface 123 is arranged in a pipeline between the main oil tank 112 and the fourth stop valve 113; the second vacuumizing and filling interface 124 is arranged on a pipeline between the auxiliary oil tank 114 and the lubricating oil bypass needle valve 118; the third vacuum fill port 125 is disposed in the line between the needle valve 121 and the grease delivery hose 122.
The main oil tank 112 and the auxiliary oil tank 114 are further provided with: three liquid level detection sight glasses 1120 and 1140 respectively arranged on the two oil tank bodies.
As shown in fig. 2, the apparatus of the present embodiment further includes: the alloy bracket 21 is fixed, and the pipe-shaped viewing mirror 103, the oil separator 106, the oil return mass flowmeter 110, the main oil tank 112, the auxiliary oil tank 114, the oil pump 117, the oil injection mass flowmeter 119 and the connected pipelines are all arranged on the alloy bracket 21.
The bottom of the alloy support 21 is provided with wheels 22 to ensure the convenient transportation and movement of the device.
The external connecting pipes are all designed as hoses, so that the connection and the disassembly are convenient; the additional metal bracket is provided with a wheel design, can move and is convenient to connect with an experimental testing device and transport; the sampling function is completed by arranging a sampling section component; and a main loop component is arranged for injecting and recovering lubricating oil, so that the functions of oil-containing refrigerant performance test and oil stagnation test are realized.
The embodiment relates to a test method of the device, which comprises the following steps: the compressor performance test bench comprises an oil content test, a monomer evaporator test and a monomer condenser test.
As shown in fig. 3, the compressor performance test stand includes: the system comprises a compressor 31, a condenser 32, an electronic expansion valve 33, an evaporator 34, an additional stop valve 35 arranged on a compressor performance test bench, and six first connection interfaces A3-1, a second connection interface A3-2, a third connection interface A3-3, a fourth connection interface A3-4, a fifth connection interface B3 and a sixth connection interface C3 which are arranged through pipelines, wherein the first connection interface A3-1, the second connection interface A3-2, the third connection interface A3-3, the fourth connection interface A3-4, the fifth connection: a pipeline of each connecting interface is respectively provided with a stop valve 351-356, and an additional stop valve 35 is arranged between the evaporator 34 and the compressor 31; the first connection port a3-1 is disposed at the inlet of the condenser 32; the second connection port a3-2 is placed at the outlet of the condenser 32; the third connection port a3-3 is disposed at the inlet of the evaporator 34; the fourth connection port a3-4 is placed at the outlet of the evaporator 34; the fifth connection interface B3 is placed at the inlet of the additional shut-off valve 35; a sixth connection interface C3 is placed at the outlet of the additional shut-off valve 35.
The compressor performance test platform oil-containing test comprises: oil cut test, oil-containing refrigerant performance test and lubricating oil retention test.
The oil content test comprises the following specific steps:
a-1, a connector B of an input metal hose 101 of the device is connected with a second connector A3-2 of the compressor performance test bench, the working condition of the compressor performance test bench is adjusted, and the refrigerant at the outlet of the condenser 32 is guaranteed to be supercooled liquid.
a-2, opening the sampling stop valve 61, closing the second stop valve 104 and the first bypass stop valve 71, allowing the working medium in the compressor performance test platform to flow into the sampling section assembly 6, and collecting and sampling in the sampling container 65.
a-3, the sampling container 65 is vacuumized in advance through the sampling section vacuumizing and filling interface 63, the sampling speed is adjusted through the sampling needle valve 64 during sampling, and the fluid flow condition is observed through the sampling sight glass 62.
and a-4, after the sampling is finished, closing the sampling stop valve 61, and determining the oil content by sampling the sample in the container 65.
The oil-containing refrigerant performance test comprises the following specific steps:
b-1. condenser test: the lubricating oil output metal hose 122 port a of the device is connected with the first connection port a3-1, the input metal hose 101 port B and the refrigerant output metal hose 107 port C of the device are respectively connected with the fifth connection port B3 and the sixth connection port C3, and the stop valves 351, 355 and 356 corresponding to the connection ports are opened.
b-2, lubricating oil in the auxiliary oil tank 114 is heated by the oil injection heater 116 to reduce viscosity, is pressurized by the oil pump 117, then flows into the compressor performance test bench through the oil injection mass flow meter 119, the one-way valve 120, the oil injection needle valve 121 and the lubricating oil output metal hose 122 in sequence, is mixed with the refrigerant at the inlet of the condenser 32, and enters the condenser 32 to test the oil-containing refrigerant; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
B-3, the refrigerant-lubricating oil mixture passes through the electronic expansion valve 33 and the evaporator 34 and then enters the device through the input metal hose 101 at a fifth connecting interface B3; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106.
b-4, the refrigerant separated by the oil separator 106 flows out of the sixth connecting interface C3 through the refrigerant output metal hose 107 and returns to the compressor performance test bench to complete the refrigerant cycle; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed.
b-5, cleaning lubricating oil: after the test is finished, the oil pump 117 is closed, the oil injection needle valve 121 is closed, the compressor performance test platform continues to operate for 1 hour, the refrigerant in the compressor performance test platform flushes the residual lubricating oil which is retained, and the lubricating oil returns to the main oil tank 112 after being separated by the oil separator 106.
b-6. evaporator test: the lubricating oil output metal hose 122 interface A of the device is connected with the third connecting interface A3-3, the input metal hose 101 interface B and the refrigerant output metal hose 107 interface C of the device are respectively connected with the fifth connecting interface B3 and the sixth connecting interface C3, and the stop valves 353, 355 and 356 corresponding to the connecting interfaces are opened.
b-7, heating and viscosity reduction are carried out on the lubricating oil in the auxiliary oil tank 114 by an oil injection heater 116, then the lubricating oil is pressurized by an oil pump 117 and then flows into a compressor performance test bench through an oil injection mass flow meter 119, a one-way valve 120, an oil injection needle valve 121 and a lubricating oil output metal hose 122 in sequence, the lubricating oil is mixed with the refrigerant at the inlet of the evaporator 34 and enters the evaporator 34 to carry out the test of the oil-containing refrigerant; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
B-8. the refrigerant-lube oil mixture after passing through the evaporator 34 enters the apparatus through the input metal hose 101 at the fifth connection B3; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106. The refrigerant separated by the oil separator 106 flows out of the sixth connection interface C3 through the refrigerant output metal hose 107 and returns to the compressor performance test bench to complete the refrigerant cycle; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed. And after the test is finished, performing the step b-5 again to clean the lubricating oil.
b-9. working condition control scheme: the temperature (viscosity) of the oil injection is controlled by adjusting the heating power of the oil injection heater 116; the oil injection flow is controlled by adjusting the opening degrees of the lubricating oil bypass needle valve 118 and the oil injection needle valve 121 in a combined manner, so that the oil content of the test working medium is controlled; the refrigerant at the inlet of the oil separator 106 is controlled to be in an overheated state by adjusting the heating power of the overheating heater 105, so that the oil separation efficiency is ensured; the oil return temperature (viscosity) is controlled by adjusting the heating power of the oil return heater 108.
b-10, checking: the reliability of the test of the oil-containing refrigerant in the step a can be further verified by comparing with the result of the oil-containing rate test sampling in the step a.
The lubricating oil retention test comprises a lubricating oil injection extraction method and a mixed sampling method.
c1. The lubricating oil injection extraction method comprises the following specific steps:
c1-1. condenser test: executing the steps b 1-b 5, and testing the oil injection mass flow rate m by the oil injection mass flow meter 119o,inThe oil return mass flow meter 110 tests that the oil return mass flow is mo,ex(ii) a And after the system runs stably, the first test is finished.
c1-2. the test of the step c1-1 obtains the oil stagnation amount of the condenser 32 plus the downstream pipeline, namely: oil injection quality
Figure BDA0002376330630000051
Oil return quality:
Figure BDA0002376330630000052
wherein: t is the time taken for the oil pump 117 to end the steady operation from the start-up.
Condenser 32 plus dead oil volume in the downstream line: OR (cond + condds) ═ Mo,in-Mo,ex。
c1-3. the lubricating oil output metal hose 122 interface A of the device is connected with a second connecting interface A3-2, and the stop valve 352 corresponding to the connecting interface is opened; lubricating oil in the auxiliary oil tank 114 is heated by the oil injection heater 116 to reduce viscosity, then is pressurized by the oil pump 117 and then flows into the compressor performance test bench through the oil injection mass flow meter 119, the one-way valve 120, the oil injection needle valve 121 and the lubricating oil output metal hose 122 in sequence, and is injected at the outlet of the condenser 32 through the second connecting interface A3-2 to be mixed with a refrigerant at the outlet of the condenser 32; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
c1-4, the refrigerant-lubricating oil mixture after heat exchange by the condenser 32 passes through the electronic expansion valve 33 and the evaporator 34 and enters the device through the input metal hose 101 at the fifth connecting interface B3; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106. The refrigerant separated by the oil separator 106 flows out of the sixth connection interface C3 through the refrigerant output metal hose 107 and returns to the compressor performance test bench to complete the refrigerant cycle; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed. And (5) after the system runs stably, finishing the second test, and executing the step b-5 to clean the lubricating oil.
c1-5. the above steps c 1-3-c 1-4 test results in the amount of stagnant oil in the line downstream of the condenser 32: or (condds) ═ Mo,in-Mo,ex(ii) a Oil retention amount of condenser 32: OR (cond) ═ OR (cond + condds) -OR (condds).
c1-6 evaporator test: step b-6 to step b-8 are executed, the oil injection mass flow meter 119 tests that the oil injection mass flow is mo,inThe oil return mass flow meter 110 tests that the oil return mass flow is mo,ex(ii) a And after the system runs stably, the first test is finished.
c1-7. the stagnant oil amount in the evaporator 34 plus downstream pipeline is obtained by the test of the step c 1-6: OR (eva + evads) ═ Mo,in-Mo,ex。
c1-8, connecting the lubricating oil output metal hose 122 interface A of the device with a fourth connecting interface A3-4, and opening a stop valve 354 corresponding to the connecting interface; lubricating oil in the auxiliary oil tank 114 is heated by the oil injection heater 116 to reduce viscosity, then is pressurized by the oil pump 117 and then flows into the compressor performance test bench through the oil injection mass flow meter 119, the check valve 120, the oil injection needle valve 121 and the lubricating oil output metal hose 122 in sequence, and is injected at the outlet of the evaporator 34 through the fourth connecting interface A3-4, mixed with refrigerant at the outlet of the evaporator 34 and enters the evaporator 34; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
c1-9. the refrigerant-lube oil mixture after passing through the evaporator 34 enters the device through the input metal hose 101 at the fifth connection B3; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106. The refrigerant separated by the oil separator 106 flows out of the sixth connection interface C3 through the refrigerant output metal hose 107 and returns to the compressor performance test bench to complete the refrigerant cycle; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed. And (5) after the system runs stably, finishing the second test, and executing the step b-5 to clean the lubricating oil.
c1-10. the above steps c 1-8-c 1-9 test results in the amount of oil stagnation in the line downstream of the evaporator 34: or (evads) ═ Mo,in-Mo,ex(ii) a Oil retention amount of evaporator 34: OR (eva) ═ OR (eva + evads) -OR (evads).
c1-11. operating condition control scheme: the temperature (viscosity) of the oil injection is controlled by adjusting the heating power of the oil injection heater 116; the oil injection flow is controlled by adjusting the opening degrees of the lubricating oil bypass needle valve 118 and the oil injection needle valve 121 in a combined manner, so that the oil content of the test working medium is controlled; the refrigerant at the inlet of the oil separator 106 is controlled to be in an overheated state by adjusting the heating power of the overheating heater 105, so that the oil separation efficiency is ensured; the oil return temperature (viscosity) is controlled by adjusting the heating power of the oil return heater 108.
c2. The mixed sampling method comprises the following specific steps:
c2-1. condenser test: the valves at both ends of the condenser 32 are closed and the compressor performance test stand is stopped to allow the refrigerant and lubricant oil in the components to be stopped in the condenser 32.
c2-2. input metal hose 101 interface B of the device is connected with the first connection interface A3-1The joint C of the lubricating oil output metal hose 107 is connected with the second connecting joint A3-2, and the stop valves 351 and 352 corresponding to the connecting joints are opened; opening the sampling stop valve 61, closing the second stop valve 104 and the first bypass stop valve 71, placing the sampling container 65 in the water bath container 66 filled with liquid nitrogen, introducing the refrigerant gas in the condenser 32 into the low-pressure sampling container 65, and weighing to obtain the refrigerant content M after the collection is finishedR。
c2-3, the third stop valve 111 and the fourth stop valve 113 are closed, and the main oil tank 112 cleaned in advance is filled with a certain mass of liquid refrigerant through the first vacuumizing and filling interface 123, which is marked as M1。
c2-4, closing the sampling stop valve 61, the second stop valve 104, the fifth stop valve 115 and the lubricating oil bypass needle valve 118, opening the first bypass stop valve 71 and the second bypass stop valve 72 of the bypass branch assembly 7, opening the third stop valve 111, the fourth stop valve 113 and the oil filling needle valve 121, and simultaneously opening the oil pump 117, the oil pump 117 mixes the refrigerant in the main oil tank 112 with the lubricating oil flow retained in the condenser 32.
c2-5, operating for a period of time to uniformly mix the refrigerant and the lubricating oil, closing the first bypass stop valve 71 and the second bypass stop valve 72, and opening the sampling stop valve 61 to sample in the sampling container 65; at the end of sampling, the oil content, i.e. the mass fraction of the lubricating oil, is determined from the sample and is denoted c.
c2-6, calculating the retention of the lubricating oil: or (cond) ═ cM1/(1-c)。
c2-7 evaporator test: the interface B of the input metal hose 101 of the device is connected with the third connecting interface A3-3, the interface C of the lubricating oil output metal hose 107 is connected with the fourth connecting interface A3-4, and the stop valves 353 and 354 are opened; then steps c2-1 to c2-6 are performed.
As shown in fig. 4, the monomer evaporator test specifically comprises the following steps:
d. and (3) oil content testing: and (3) connecting an input metal hose 101 interface B of the evaporator 4 to be tested with the single evaporator testing device, wherein the connection part is required to ensure that the refrigerant is in a supercooled liquid state, the refrigerant and the lubricating oil are completely mutually soluble, and executing steps a 1-a 4.
The monomer evaporator testing device comprises: an additional shut-off valve 41 and three first connection ports a4, a second connection port B4 and a third connection port C4, which are arranged by lines, wherein: a pipeline of each connecting interface is provided with a stop valve 42-44; the input end of the additional stop valve 41 is connected with the output end of the evaporator 4 to be tested; the first connection port a4 is placed at the inlet of the evaporator 4 to be tested; the second connection interface B4 is placed at the outlet of the evaporator 4 to be tested; a third connection interface C4 is placed at the outlet of the additional shut-off valve 41.
e. The oil-containing refrigerant performance test comprises the following specific steps:
e-1. the lubricating oil output metal hose 122 interface A of the device is connected with the first connecting interface A4 of the unit evaporator testing device, the input metal hose 101 interface B is connected with the second connecting interface B4, the refrigerant output metal hose 107 interface C is connected with the third connecting interface C4, and the stop valves 42, 43 and 44 corresponding to the connecting interfaces are opened.
e-2, lubricating oil in the auxiliary oil tank 114 is heated by the oil injection heater 116 to reduce viscosity, is pressurized by the oil pump 117 and then flows into the monomer evaporator testing device through the oil injection mass flowmeter 119, the one-way valve 120, the oil injection needle valve 121 and the lubricating oil output metal hose 122 in sequence; the lubricating oil is injected through a first connecting interface A4 at the inlet of the evaporator 4 to be tested, mixed with the refrigerant and enters the evaporator 4 to be tested to test the oil-containing refrigerant; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
e-3, the refrigerant-lubricating oil mixture passing through the evaporator 4 to be tested enters the device through the input metal hose 101 at the second connecting interface B4; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106. The refrigerant separated by the oil separator 106 flows out of the third connection interface C4 through the refrigerant output metal hose 107 and returns to the monomer evaporator testing device, and the refrigerant cycle is completed; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed.
And e-4, completing the second test after the system is stably operated. The oil pump 117 is turned off, the oil filling needle valve 121 is closed, the monomer evaporator testing device continues to operate for 1 hour, the refrigerant in the monomer evaporator testing device flushes the residual lubricating oil which is retained, and the lubricating oil returns to the main oil tank 112 after being separated by the oil separator 106.
e-5, working condition control scheme: in accordance with step b-9.
f. And (3) testing the oil retention: the method is divided into a lubricating oil injection extraction method and a mixed sampling method.
f1. Lubricating oil injection extraction method
f1-1. the lubricating oil output metal hose 122 interface A of the device is connected with the first connection interface A4 of the single evaporator testing device, the input metal hose 101 interface B is connected with the second connection interface B4, the refrigerant output metal hose 107 interface C is connected with the third connection interface C4, and the stop valves 42, 43 and 44 corresponding to the connection interfaces are opened.
f1-2, heating and viscosity reduction are carried out on the lubricating oil in the auxiliary oil tank 114 by the oil injection heater 116, then the lubricating oil is pressurized by the oil pump 117 and then flows into the monomer evaporator testing device through the oil injection mass flowmeter 119, the one-way valve 120, the oil injection needle valve 121 and the lubricating oil output metal hose 122 in sequence; the lubricating oil is injected at the inlet of the evaporator 4 to be tested through the first connecting interface A4, is mixed with the refrigerant and enters the evaporator 4 to be tested; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
f1-3, the refrigerant-lubricating oil mixture passing through the evaporator 4 to be tested enters the device through the input metal hose 101 at the second connecting interface B4; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106. The refrigerant separated by the oil separator 106 flows out of the third connection interface C4 through the refrigerant output metal hose 107 and returns to the monomer evaporator testing device, and the refrigerant cycle is completed; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed.
f1-4, mass flow meter 119 for oil injectiono,inThe oil return mass flow meter 110 tests that the oil return mass flow is mo,ex(ii) a After the system runs stably, the test is completed, and the oil stagnation amount of the evaporator 4 to be tested is as follows: OR (eva4) ═ Mo,in-Mo,ex。
f1-5, after the test is finished, executing the step e-4 to clean the lubricating oil.
f1-6, operating condition control scheme: in accordance with step b-9.
f2. Mixed sampling method
f2-1, after the system runs stably, closing the valves at the two ends of the evaporator 4 to be tested, and simultaneously stopping running the single evaporator testing device to ensure that the refrigerant and the lubricating oil in the components are all stopped in the evaporator 4 to be tested.
f2-2. the input metal hose 101 interface B of the device is connected with the first connection interface A4 of the monomer evaporator testing device, the lubricating oil output metal hose 107 interface C is connected with the second connection interface B4, and the stop valves 42 and 43 corresponding to the connection interfaces are opened; opening the sampling stop valve 61, closing the second stop valve 104 and the first bypass stop valve 71, placing the sampling container 65 in the water bath container 66 filled with liquid nitrogen, enabling the refrigerant gas in the evaporator 4 to be tested to enter the low-pressure sampling container 65, weighing to obtain the refrigerant content M after the collection is finishedR。
f2-3, the third stop valve 111 and the fourth stop valve 113 are closed, and the main oil tank 112 cleaned in advance is filled with a certain mass of liquid refrigerant through the first vacuumizing and filling interface 123, which is marked as M1。
f2-4, closing the sampling stop valve 61, the second stop valve 104, the fifth stop valve 115 and the lubricating oil bypass needle valve 118, opening the first bypass stop valve 71 and the second bypass stop valve 72 of the bypass branch assembly 7, opening the third stop valve 111, the fourth stop valve 113 and the oil injection needle valve 121, and simultaneously opening the oil pump 117, wherein the oil pump 117 enables the refrigerant in the main oil tank 112 to be mixed with the lubricating oil retained by the evaporator 4 to be tested in a flowing manner.
f2-5, operating for a period of time to uniformly mix the refrigerant and the lubricating oil, closing the first bypass stop valve 71 and the second bypass stop valve 72, and opening the sampling stop valve 61 to sample in the sampling container 65; at the end of sampling, the oil content, i.e. the mass fraction of the lubricating oil, is determined from the sample and is denoted c.
f2-6, calculating the retention of the lubricating oil: OR (eva4) ═ cM1/(1-c)。
As shown in fig. 5, the monomer condenser test specifically includes the following steps:
g. and (3) oil content testing: and (3) connecting an input metal hose 101 interface B of the condenser 5 to be tested with the single condenser testing device, wherein the connection part is required to ensure that the refrigerant is in a supercooled liquid state and the refrigerant and the lubricating oil are completely mutually soluble, and executing the steps a 1-a 4.
The monomer condenser testing device comprises: the downstream pipeline, the heating evaporator 51, the additional stop valve 52 and the first connection port A5-1, the second connection port A5-2, the third connection port B5 and the fourth connection port C5 which are respectively arranged through the pipeline, wherein: a pipeline of each connecting interface is provided with a stop valve 53-56; the input end of the additional stop valve 52 is connected with the output end of the heating evaporator 51; the first connecting interface A5-1 is arranged at the inlet of the condenser 5 to be tested; the second connecting interface A5-2 is arranged at the outlet of the condenser to be tested 5; the third connection port B5 is arranged at the outlet of the heating evaporator 51; a fourth connection interface C5 is placed at the outlet of the additional shut-off valve 52.
h. Testing of oil-containing refrigerant Performance
h-1, the lubricating oil output metal hose 122 interface A of the device is connected with the first connecting interface A5-1 of the single condenser testing device, the input metal hose 101 interface B is connected with the third connecting interface B5, the refrigerant output metal hose 107 interface C is connected with the fourth connecting interface C5, and the stop valves 53, 55 and 56 corresponding to the connecting interfaces are opened.
h-2, lubricating oil in the auxiliary oil tank 114 is heated by the oil injection heater 116 to reduce viscosity, is pressurized by the oil pump 117, and then flows into the monomer condenser testing device through the oil injection mass flowmeter 119, the one-way valve 120, the oil injection needle valve 121 and the lubricating oil output metal hose 122 in sequence; injecting lubricating oil through a first connecting interface A5-1 at the inlet of the condenser 5 to be tested, mixing the lubricating oil with the refrigerant at the inlet of the condenser 5 to be tested, and allowing the lubricating oil to enter the condenser 5 to be tested to test the oil-containing refrigerant; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
h-3, the refrigerant-lubricating oil mixture flowing out of the condenser 5 to be tested enters the device through the input metal hose 101 at a third connecting interface B5 after passing through the oil feeding pipeline and heating the evaporator 51; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106.
h-4, the refrigerant separated by the oil separator 106 flows out of the fourth connection interface C5 through the refrigerant output metal hose 107 and returns to the monomer condenser testing device, and the refrigerant circulation is completed; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed.
h-5, cleaning lubricating oil: after the test is finished, the oil pump 117 is closed, the oil injection needle valve 121 is closed, the monomer condenser test device continues to operate for 1 hour, the refrigerant in the monomer condenser test device flushes the residual lubricating oil which is retained, and the lubricating oil returns to the main oil tank 112 after being separated by the oil separator 106.
h-6. working condition control scheme: in accordance with step b-9.
i. And (3) testing the oil retention: the method is divided into a lubricating oil injection extraction method and a mixed sampling method.
i1. Lubricating oil injection extraction method
i1-1. the lubricating oil output metal hose 122 interface A of the device is connected with the first connection interface A5-1 of the single condenser testing device, the input metal hose 101 interface B is connected with the third connection interface B5, the refrigerant output metal hose 107 interface C is connected with the fourth connection interface C5, and the stop valves 53, 55 and 56 corresponding to the connection interfaces are opened.
i1-2, heating and viscosity reduction are carried out on the lubricating oil in the auxiliary oil tank 114 by an oil injection heater 116, then the lubricating oil is pressurized by an oil pump 117 and then flows into the monomer condenser testing device through an oil injection mass flowmeter 119, a one-way valve 120, an oil injection needle valve 121 and a lubricating oil output metal hose 122 in sequence; the lubricating oil is injected at the inlet of the condenser 5 to be tested through a first connecting interface A5-1, is mixed with the refrigerant and enters the condenser 5 to be tested; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
i1-3, the refrigerant-lubricating oil mixture flowing out of the condenser 5 to be tested enters the device through the input metal hose 101 at the third connecting interface B5 after passing through the oil outlet pipeline and the heating evaporator 51; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106. The refrigerant separated by the oil separator 106 flows out of the fourth connection interface C5 through the refrigerant output metal hose 107 and returns to the monomer condenser testing device, and the refrigerant cycle is completed; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed.
i1-4. oil injection mass flowmeter 119 tests that oil injection mass flow is mo,inThe oil return mass flow meter 110 tests that the oil return mass flow is mo,ex(ii) a And (3) after the system runs stably, completing the test, and obtaining the stagnant oil mass of the condenser 5 to be tested, the downstream pipeline and the heating evaporator 51 in steps i 1-1-i 1-3: OR (cond5+ cond5ds) ═ Mo,in-Mo,ex。
i1-5, after the test is finished, executing a step h-5 to clean the lubricating oil.
i1-6. second test: the lubricating oil output metal hose 122 interface A of the device is connected with the second connecting interface A5-2 of the single condenser testing device, the input metal hose 101 interface B is connected with the third connecting interface B5, the refrigerant output metal hose 107 interface C is connected with the fourth connecting interface C5, and the stop valves 54, 55 and 56 corresponding to the connecting interfaces are opened.
i1-7, heating and viscosity reduction are carried out on the lubricating oil in the auxiliary oil tank 114 by an oil injection heater 116, then the lubricating oil is pressurized by an oil pump 117 and then flows into the monomer condenser testing device through an oil injection mass flowmeter 119, a one-way valve 120, an oil injection needle valve 121 and a lubricating oil output metal hose 122 in sequence; the lubricating oil is injected at the outlet of the condenser 5 to be tested through a second connecting interface A5-2 and is mixed with the refrigerant; a portion of the oil bypasses the oil bypass needle valve 118 and flows back to the secondary oil tank 114.
i1-8, the mixed refrigerant-lubricating oil mixture passes through the oil discharge pipeline and heats the evaporator 51, and then enters the device through the input metal hose 101 at the third connecting interface B5; at this time, the second cut-off valve 104 is opened, and the sampling cut-off valve 61 and the first bypass cut-off valve 71 are closed; the mixture passes through a first shutoff valve 102, a tube-type view mirror 103, a second shutoff valve 104, and a superheating heater 105 in this order, and then reaches an oil separator 106. The refrigerant separated by the oil separator 106 flows out of the fourth connection interface C5 through the refrigerant output metal hose 107 and returns to the monomer condenser testing device, and the refrigerant cycle is completed; the separated lubricating oil is heated by an oil return heater 108 to reduce viscosity, then passes through an oil return mass flow meter 110 and a third stop valve 111 and is stored in a main oil tank 112, and the lubricating oil circulation is completed.
i1-9. after the system runs stably, the test is finished; the steps i1-6 to i1-8 obtain the stagnant oil amount of the downstream pipeline and the heating evaporator 51: OR (cond5ds) ═ Mo,in-Mo,ex。
i1-10, calculating the oil stagnation amount of the condenser 5 to be measured: OR (cond5) ═ OR (cond5+ cond5ds) -OR (cond5 ds).
i1-11. operating condition control scheme: in accordance with step b-9.
i2. Mixed sampling method
i2-1, after the system runs stably, closing valves at two ends of the condenser to be tested 5, and simultaneously stopping running the single condenser testing device to ensure that the refrigerant and the lubricating oil in the components are all stopped in the condenser to be tested 5.
i2-2. the input metal hose 101 interface B of the device is connected with the first connection interface A5-1 of the single condenser testing device, the lubricating oil output metal hose 107 interface C is connected with the second connection interface A5-2, and the stop valves 53 and 54 corresponding to the connection interfaces are opened; the sampling cut-off valve 61 is opened, the second cut-off valve 104 and the first bypass cut-off valve 71 are closed,placing the sampling container 65 in a water bath container 66 filled with liquid nitrogen, introducing the refrigerant gas in the condenser 5 to be measured into the low-pressure sampling container 65, collecting, and weighing to obtain the refrigerant content MR。
i2-3, the third stop valve 111 and the fourth stop valve 113 are closed, and the main oil tank 112 cleaned in advance is filled with a certain mass of liquid refrigerant through the first vacuumizing and filling interface 123, which is marked as M1。
i2-4, closing the sampling stop valve 61, the second stop valve 104, the fifth stop valve 115 and the lubricating oil bypass needle valve 118, opening the first bypass stop valve 71 and the second bypass stop valve 72 of the bypass branch assembly 7, opening the third stop valve 111, the fourth stop valve 113 and the oil injection needle valve 121, and simultaneously opening the oil pump 117, wherein the oil pump 117 enables the refrigerant in the main oil tank 112 to be mixed with the lubricating oil retained by the condenser 5 to be tested.
i2-5, operating for a period of time to uniformly mix the refrigerant and the lubricating oil, closing the first bypass stop valve 71 and the second bypass stop valve 72, and opening the sampling stop valve 61 to sample in the sampling container 65; at the end of sampling, the oil content, i.e. the mass fraction of the lubricating oil, is determined from the sample and is denoted c.
f2-6, calculating the retention of the lubricating oil: OR (cond5) ═ cM1/(1-c)。
In the prior art, the test of the oily refrigerant can only be realized by building a new oily test device test bench, but the device can be added on the existing pure refrigerant test device to expand the test function of the oily refrigerant, so that the cost is saved.
The existing oil-containing refrigerant testing technology can only carry out single type testing generally, but the device can carry out sampling, oil-containing refrigerant performance testing and oil stagnation testing simultaneously, and the testing function is rich.
The external connecting pipe of this device is the hose design, and installs on mobilizable support for the convenient dismantlement of device, removal, the ability reusability and the mobility of device obtain promoting.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (8)

1. A portable oily refrigerant testing device, comprising: the sampling section assembly and the bypass branch assembly are respectively arranged on the main loop assembly; the main loop assembly includes: the device comprises an input metal hose, a first stop valve, a pipe-type view mirror, a second stop valve, an overheating heater, an oil separator, an oil return heater, an oil return view mirror, an oil return mass flowmeter, a third stop valve, a main oil tank, a fourth stop valve, an auxiliary oil tank with an oil injection heater, an oil injection mass flowmeter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose which are connected in sequence, wherein: the sampling section assembly and the bypass branch assembly are respectively arranged at the output end of the tubular sight glass, a refrigerant output end of the oil separator is provided with a refrigerant output metal hose, a lubricating oil output end is connected with the input end of the oil return heater, the fourth stop valve is arranged between the main oil tank and the auxiliary oil tank, the oil injection heater and the oil pump are respectively connected with the fifth stop valve at the output end of the auxiliary oil tank and the lubricating oil bypass needle valve at the input end, and the oil pump and the lubricating oil bypass needle valve are respectively connected with the oil injection.
2. The portable oily refrigerant testing device of claim 1, wherein the sampling section assembly comprises: sample stop valve, sample sight glass, the section evacuation of taking a sample that connects gradually fill interface, sample needle valve, sample container and water bath container, wherein: the sampling stop valve is connected with the output end of the tube-shaped sight glass.
3. The portable oily refrigerant testing device of claim 1, wherein the bypass branch assembly comprises: first bypass stop valve and the second bypass stop valve that connects gradually, wherein: the first bypass stop valve is connected with the output end of the tubular sight glass, and the second bypass stop valve is connected with the output end of the oil return mass flow meter.
4. A method of testing a device according to any preceding claim, comprising: the compressor performance test bench comprises an oil content test, a monomer evaporator test and a monomer condenser test.
5. The method of claim 4, wherein said compressor performance test station comprises: compressor, condenser, electronic expansion valve, the evaporimeter that connects gradually and set up additional stop valve and six first connection interface, second connection interface, third connection interface, fourth connection interface, fifth connection interface and the sixth connection interface that set up through the pipeline on the compressor performance test platform, wherein: the pipeline of each connecting interface is respectively provided with a stop valve, and the additional stop valve is arranged between the evaporator and the compressor; the first connecting interface is arranged at the inlet of the condenser; the second connecting interface is arranged at the outlet of the condenser; the third connecting interface is arranged at the inlet of the evaporator; the fourth connecting interface is arranged at the outlet of the evaporator; the fifth connecting interface is arranged at the inlet of the additional stop valve; the sixth connecting interface is arranged at the outlet of the additional stop valve;
the compressor performance test platform oil-containing test comprises: oil cut test, oil-containing refrigerant performance test and lubricating oil retention test.
6. The method as claimed in claim 5, wherein the oil content test comprises the following steps:
a-1, connecting an input metal hose interface of the device with a second connecting port of a compressor performance test bench, adjusting the working condition of the compressor performance test bench, and ensuring that a refrigerant at an outlet of a condenser is a supercooled liquid;
a-2, opening a sampling stop valve, closing a second stop valve and a first bypass stop valve, allowing the working medium in the compressor performance test platform to flow into a sampling section assembly, and collecting and sampling in a sampling container;
a-3, vacuumizing the sampling container through a sampling section vacuumizing filling interface in advance, adjusting the sampling rate through a sampling needle valve in the sampling process, and observing the fluid flow condition through a sampling sight glass;
a-4, after sampling, closing the sampling stop valve, and determining the oil content by the sample in the sampling container;
the oil-containing refrigerant performance test comprises the following specific steps:
b-1. condenser test: a lubricating oil output metal hose interface of the device is connected with the first connecting interface, an input metal hose interface and a refrigerant output metal hose interface of the device are respectively connected with the fifth connecting interface and the sixth connecting interface, and the stop valves corresponding to the connecting interfaces are opened;
b-2, heating the lubricating oil in the auxiliary oil tank by an oil injection heater to reduce viscosity, pressurizing by an oil pump, flowing into a compressor performance test bench through an oil injection mass flow meter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose in sequence, mixing with a refrigerant at the inlet of a condenser, and entering the condenser to test an oil-containing refrigerant; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
b-3, the refrigerant-lubricating oil mixture passes through the electronic expansion valve and the evaporator and then enters the device through the input metal hose at the fifth connecting interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator;
b-4, the refrigerant separated by the oil separator flows out of the sixth connecting interface through a refrigerant output metal hose and returns to the compressor performance test bench to complete refrigerant circulation; the separated lubricating oil is heated by an oil return heater to reduce viscosity, and then is stored in a main oil tank after passing through an oil return mass flow meter and a third stop valve, so that the lubricating oil circulation is completed;
b-5, cleaning lubricating oil: after the test is finished, the oil pump is closed, the oil injection needle valve is closed, the compressor performance test platform continues to operate for 1 hour, so that the refrigerant in the compressor performance test platform flushes the residual lubricating oil which is retained, and the lubricating oil returns to the main oil tank after being separated by the oil separator;
b-6. evaporator test: a lubricating oil output metal hose interface of the device is connected with the third connecting interface, an input metal hose interface and a refrigerant output metal hose interface of the device are respectively connected with the fifth connecting interface and the sixth connecting interface, and the stop valves corresponding to the connecting interfaces are opened;
b-7, heating the lubricating oil in the auxiliary oil tank by an oil injection heater to reduce viscosity, pressurizing by an oil pump, flowing into a compressor performance test bench through an oil injection mass flow meter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose in sequence, mixing with the refrigerant at the inlet of the evaporator, and entering the evaporator to test the refrigerant containing oil; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
b-8, the refrigerant-lubricating oil mixture passing through the evaporator enters the device through an input metal hose at a fifth connecting interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator, and the refrigerant separated by the oil separator flows out of the sixth connecting interface through the refrigerant output metal hose and returns to the compressor performance test bench to complete refrigerant circulation; heating the separated lubricating oil by an oil return heater to reduce viscosity, then storing the lubricating oil in a main oil tank after passing through an oil return mass flow meter and a third stop valve to finish the circulation of the lubricating oil, and after the test is finished, executing the step b-5 again to clean the lubricating oil;
b-9. working condition control scheme: the temperature of the oiling is controlled by adjusting the heating power of the oiling heater; the oil injection flow is controlled by adjusting the opening degrees of the lubricating oil bypass needle valve and the oil injection needle valve in a combined manner so as to control the oil content of the test working medium; the refrigerant at the inlet of the oil separator is controlled to be in an overheated state by adjusting the heating power of the overheating heater, so that the oil separation efficiency is ensured; the oil return temperature is controlled by adjusting the heating power of the oil return heater;
b-10, checking: the reliability of the test of the oil-containing refrigerant in the step a can be further verified by comparing with the result of the oil-containing rate test sampling in the step a;
the lubricating oil retention test comprises a lubricating oil injection extraction method and a mixed sampling method, wherein:
c1. the lubricating oil injection extraction method comprises the following specific steps:
c1-1. condenser test: step b 1-b 5 is executed, the oil mass flow meter tests that the oil mass flow is mo,inThe oil return mass flow measured by the oil return mass flowmeter is mo,ex(ii) a After the system runs stably, the first test is finished;
c1-2. the test of the step c1-1 obtains the oil stagnation amount of the condenser and the downstream pipeline, namely: oil injection quality
Figure FDA0002376330620000031
Oil return quality:
Figure FDA0002376330620000032
wherein: t is the time taken by the oil pump from starting to finishing the stable operation;
condenser 32 plus dead oil volume in the downstream line: OR (cond + condds) ═ Mo,in-Mo,ex；
c1-3, connecting the lubricating oil output metal hose interface of the device with the second connecting interface, and opening the stop valve corresponding to the connecting interface; lubricating oil in the auxiliary oil tank is heated by the oil injection heater to reduce viscosity, then is pressurized by the oil pump and then sequentially flows into the compressor performance test bench through the oil injection mass flow meter, the one-way valve, the oil injection needle valve and the lubricating oil output metal hose, and is injected at the outlet of the condenser through the second connecting interface and mixed with the refrigerant at the outlet of the condenser; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
c1-4, the refrigerant-lubricating oil mixture after heat exchange by the condenser passes through the electronic expansion valve and the evaporator and then enters the device through the input metal hose at the fifth connecting interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator, and the refrigerant separated by the oil separator flows out of the sixth connecting interface through the refrigerant output metal hose and returns to the compressor performance test bench to complete refrigerant circulation; heating the separated lubricating oil by an oil return heater to reduce viscosity, then storing the lubricating oil in a main oil tank after passing through an oil return mass flow meter and a third stop valve to finish the circulation of the lubricating oil, finishing the second test after the system runs stably, and executing the step b-5 to clean the lubricating oil;
c1-5. the test of the steps c 1-3-c 1-4 results in the oil stagnation of the pipeline downstream of the condenser: or (condds) ═ Mo,in-Mo,ex(ii) a Oil stagnation amount of the condenser: OR (cond) ═ OR (cond + condds) -OR (condds);
c1-6 evaporator test: step b-6 to step b-8 are executed, the mass flow of oil injection is measured by the oil injection mass flowmeter to be mo,inThe oil return mass flow measured by the oil return mass flowmeter is mo,ex(ii) a After the system runs stably, the first test is finished;
c1-7. the stagnant oil amount of the evaporator and the downstream pipeline is obtained by the test of the step c 1-6: OR (eva + evads) ═ Mo,in-Mo,ex；
c1-8, connecting the lubricating oil output metal hose interface of the device with the fourth connecting interface, and opening the stop valve corresponding to the connecting interface; lubricating oil in the auxiliary oil tank is heated by the oil injection heater to reduce viscosity, then is pressurized by the oil pump and then flows into the compressor performance test bench through the oil injection mass flow meter, the one-way valve, the oil injection needle valve and the lubricating oil output metal hose in sequence, and the lubricating oil is injected at the outlet of the evaporator through the fourth connecting interface, is mixed with the refrigerant at the outlet of the evaporator and enters the evaporator; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
c1-9. the refrigerant-lubricant mixture after passing through the evaporator enters the device through the input metal hose at the fifth connection interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator, and the refrigerant separated by the oil separator flows out of the sixth connecting interface through the refrigerant output metal hose and returns to the compressor performance test bench to complete refrigerant circulation; heating the separated lubricating oil by an oil return heater to reduce viscosity, then storing the lubricating oil in a main oil tank after passing through an oil return mass flow meter and a third stop valve to finish the circulation of the lubricating oil, finishing the second test after the system runs stably, and executing the step b-5 to clean the lubricating oil;
c1-10. the oil stagnation amount of the pipeline downstream of the evaporator is obtained through the tests of the steps c 1-8-c 1-9: or (evads) ═ Mo,in-Mo,ex(ii) a Oil retention of evaporator: OR (eva) ═ OR (eva + evads) -OR (evads);
c1-11. operating condition control scheme: the temperature (viscosity) of the oil injection is controlled by adjusting the heating power of the oil injection heater 116; the oil injection flow is controlled by adjusting the opening degrees of the lubricating oil bypass needle valve 118 and the oil injection needle valve 121 in a combined manner, so that the oil content of the test working medium is controlled; the refrigerant at the inlet of the oil separator 106 is controlled to be in an overheated state by adjusting the heating power of the overheating heater 105, so that the oil separation efficiency is ensured; the oil return temperature (viscosity) is controlled by adjusting the heating power of the oil return heater 108;
c2. the mixed sampling method comprises the following specific steps:
c2-1. condenser test: closing valves at two ends of the condenser, and simultaneously stopping running the compressor performance test bench to stop the refrigerant and the lubricating oil in the components in the condenser;
c2-2. the input metal hose interface of the device is connected with the first connecting interface, the lubricating oil output metal hose interface is connected with the second connecting interface, and the stop valve corresponding to the connecting interface is opened; opening the sampling stop valve, closing the second stop valve and the first bypass stop valve, placing the sampling container in a water bath container filled with liquid nitrogen, enabling the refrigerant gas in the condenser to enter the low-pressure sampling container, weighing to obtain the refrigerant content M after the collection is finishedR；
c2-3, closing the third stop valve and the fourth stop valve, and filling a certain mass of liquid refrigerant, marked as M, into the main oil tank cleaned in advance through the first vacuumizing and filling interface1；
c2-4, closing the sampling stop valve, the second stop valve, the fifth stop valve and the lubricating oil bypass needle valve, opening the first bypass stop valve and the second bypass stop valve of the bypass branch assembly, opening the third stop valve, the fourth stop valve and the oil injection needle valve, and simultaneously opening the oil pump, so that the refrigerant in the main oil tank is mixed with the lubricating oil retained by the condenser in a flowing manner by the oil pump;
c2-5, operating for a period of time to uniformly mix the refrigerant and the lubricating oil, closing the first bypass stop valve and the second bypass stop valve, and opening the sampling stop valve to sample in the sampling container; after sampling, determining the oil content, namely the mass fraction of the lubricating oil, which is marked as c, according to the sample;
c2-6, calculating the retention of the lubricating oil: or (cond) ═ cM1/(1-c)；
c2-7 evaporator test: an input metal hose interface of the device is connected with a third connecting interface, a lubricating oil output metal hose interface is connected with a fourth connecting interface, and a stop valve corresponding to the connecting interface is opened; then steps c2-1 to c2-6 are performed.
7. The method as claimed in claim 6, wherein the monomer evaporator test comprises the following steps:
d. and (3) oil content testing: connecting an input metal hose interface of an evaporator to be tested with a monomer evaporator testing device, wherein the connection part is required to ensure that a refrigerant at the connection part is in a supercooled liquid state, the refrigerant and lubricating oil are completely mutually soluble, and executing steps a 1-a 4;
the monomer evaporator testing device comprises: additional stop valve and three first connection interface, second connection interface and the third connection interface that sets up through the pipeline, wherein: a stop valve is arranged on each pipeline of each connecting interface; the input end of the additional stop valve is connected with the output end of the evaporator to be tested; the first connecting interface is arranged at the inlet of the evaporator to be tested; the second connecting interface is arranged at the outlet of the evaporator to be tested; the third connecting interface is arranged at the outlet of the additional stop valve;
e. the oil-containing refrigerant performance test comprises the following specific steps:
e-1, connecting a lubricating oil output metal hose interface of the device with a first connecting interface of a monomer evaporator testing device, connecting an input metal hose interface with a second connecting interface, connecting a refrigerant output metal hose interface with a third connecting interface, and opening a stop valve corresponding to the connecting interface;
e-2, heating the lubricating oil in the auxiliary oil tank by an oil injection heater to reduce viscosity, pressurizing by an oil pump, and flowing into the monomer evaporator testing device through an oil injection mass flowmeter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose in sequence; injecting lubricating oil through a first connecting interface at an inlet of an evaporator to be tested, mixing the lubricating oil with a refrigerant, and allowing the lubricating oil to enter the evaporator to be tested to test the refrigerant containing oil; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
e-3, the refrigerant-lubricating oil mixture passing through the evaporator to be tested enters the device through the input metal hose at the second connection interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator, and the refrigerant separated by the oil separator flows out of the third connecting interface through the refrigerant output metal hose and returns to the monomer evaporator testing device to complete refrigerant circulation; the separated lubricating oil is heated by an oil return heater to reduce viscosity, and then is stored in a main oil tank after passing through an oil return mass flow meter and a third stop valve, so that the lubricating oil circulation is completed;
e-4, after the system runs stably, completing the second test, closing the oil pump, closing the oil injection needle valve, continuously running the single evaporator testing device for 1 hour, flushing residual lubricating oil retained by the refrigerant in the single evaporator testing device, and returning the lubricating oil to the main oil tank after the lubricating oil is separated by the oil separator;
e-5, working condition control scheme: in accordance with step b-9;
f. and (3) testing the oil retention: the method comprises a lubricating oil injection extraction method and a mixed sampling method, wherein the method comprises the following steps:
f1. the lubricating oil injection extraction method specifically comprises the following steps:
f1-1, connecting the lubricating oil output metal hose interface of the device with the first connecting interface of the monomer evaporator testing device, connecting the input metal hose interface with the second connecting interface, connecting the refrigerant output metal hose interface with the third connecting interface, and opening the stop valve corresponding to the connecting interface;
f1-2, heating the lubricating oil in the auxiliary oil tank by an oil injection heater to reduce viscosity, pressurizing by an oil pump, and flowing into the monomer evaporator testing device through the oil injection mass flowmeter, the one-way valve, the oil injection needle valve and the lubricating oil output metal hose in sequence; injecting lubricating oil at an inlet of the evaporator to be tested through the first connecting interface, mixing the lubricating oil with the refrigerant, and feeding the lubricating oil into the evaporator to be tested; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
f1-3, the refrigerant-lubricating oil mixture passing through the evaporator to be tested enters the device through the input metal hose at the second connection interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator, and the refrigerant separated by the oil separator flows out of the third connecting interface through the refrigerant output metal hose and returns to the monomer evaporator testing device to complete refrigerant circulation; the separated lubricating oil is heated by an oil return heater to reduce viscosity, and then is stored in a main oil tank after passing through an oil return mass flow meter and a third stop valve, so that the lubricating oil circulation is completed;
f1-4. oil injection mass flowmeter test oil injection mass flow is mo,inThe oil return mass flow measured by the oil return mass flowmeter is mo,ex(ii) a After the system runs stably, the test is completed, and the oil stagnation amount of the evaporator to be tested is as follows: OR (eva4) ═ Mo,in-Mo,ex；
f1-5, after the test is finished, executing the step e-4 to clean the lubricating oil;
f2. mixed sampling method
f2-1, after the system runs stably, closing valves at two ends of the evaporator to be tested, and simultaneously stopping running the single evaporator testing device to ensure that the refrigerant and the lubricating oil in the components are all stopped in the evaporator to be tested;
f2-2, connecting the input metal hose interface of the device with the first connecting interface of the monomer evaporator testing device, connecting the lubricating oil output metal hose interface with the second connecting interface, and opening the stop valve corresponding to the connecting interface; opening the sampling stop valve, closing the second stop valve and the first bypass stop valve, placing the sampling container in a water bath container filled with liquid nitrogen, enabling refrigerant gas in the evaporator to be tested to enter the low-pressure sampling container, and collectingAfter the completion, weighing to obtain the refrigerant content MR；
f2-3, closing the third stop valve and the fourth stop valve, and filling a certain mass of liquid refrigerant, marked as M, into the main oil tank cleaned in advance through the first vacuumizing and filling interface1；
f2-4, closing the sampling stop valve, the second stop valve, the fifth stop valve and the lubricating oil bypass needle valve, opening the first bypass stop valve and the second bypass stop valve of the bypass branch assembly, opening the third stop valve, the fourth stop valve and the oil injection needle valve, and simultaneously opening the oil pump, so that the refrigerant in the main oil tank is mixed with the lubricating oil retained by the evaporator to be tested in a flowing manner by the oil pump;
f2-5, operating for a period of time to uniformly mix the refrigerant and the lubricating oil, closing the first bypass stop valve and the second bypass stop valve, and opening the sampling stop valve to sample in the sampling container; after sampling, determining the oil content, namely the mass fraction of the lubricating oil, which is marked as c, according to the sample;
f2-6, calculating the retention of the lubricating oil: OR (eva4) ═ cM1/(1-c)。
8. The method as claimed in claim 6, wherein the monomer condenser test comprises the following steps:
g. and (3) oil content testing: connecting an input metal hose interface of a condenser to be tested with a monomer condenser testing device, wherein the connection part is required to ensure that a refrigerant at the connection part is in a supercooled liquid state, and the refrigerant and lubricating oil are completely mutually soluble, and executing steps a 1-a 4;
the monomer condenser testing device comprises: downstream pipeline, heating evaporimeter and additional stop valve and first connection interface, second connection interface, third connection interface and the fourth connection interface that sets up through the pipeline respectively, wherein: a stop valve is arranged on each pipeline of each connecting interface; the input end of the additional stop valve is connected with the output end of the heating evaporator; the first connecting interface is arranged at the inlet of the condenser to be measured; the second connecting interface is arranged at the outlet of the condenser to be tested; the third connecting interface is arranged at the outlet of the heating evaporator; the fourth connecting interface is arranged at the outlet of the additional stop valve;
h. testing of oil-containing refrigerant Performance
h-1, connecting a lubricating oil output metal hose interface of the device with a first connecting interface of a single condenser testing device, connecting an input metal hose interface with a third connecting interface, connecting a refrigerant output metal hose interface with a fourth connecting interface, and opening a stop valve corresponding to the connecting interface;
h-2, heating the lubricating oil in the auxiliary oil tank by an oil injection heater to reduce viscosity, pressurizing by an oil pump, and flowing into the monomer condenser testing device through an oil injection mass flowmeter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose in sequence; injecting lubricating oil through a first connecting interface at an inlet of a condenser to be tested, mixing the lubricating oil with a refrigerant at the inlet of the condenser to be tested, and allowing the lubricating oil to enter the condenser to be tested to test an oil-containing refrigerant; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
h-3, the refrigerant-lubricating oil mixture flowing out of the condenser to be tested passes through the oil discharging pipeline and the heating evaporator and then enters the device through the input metal hose at the third connecting interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator;
h-4, the refrigerant separated by the oil separator flows out of the fourth connecting interface through a refrigerant output metal hose and returns to the monomer condenser testing device to complete refrigerant circulation; the separated lubricating oil is heated by an oil return heater to reduce viscosity, and then is stored in a main oil tank after passing through an oil return mass flow meter and a third stop valve, so that the lubricating oil circulation is completed;
h-5, cleaning lubricating oil: after the test is finished, the oil pump is closed, the oil injection needle valve is closed, the single condenser test device continues to operate for 1 hour, so that the refrigerant in the single condenser test device flushes the residual lubricating oil which is retained, and the lubricating oil returns to the main oil tank after being separated by the oil separator;
h-6. working condition control scheme: in accordance with step b-9;
i. and (3) testing the oil retention: the method comprises a lubricating oil injection extraction method and a mixed sampling method;
i1. lubricating oil injection extraction method
i1-1, connecting a lubricating oil output metal hose interface of the device with a first connecting interface of a single condenser testing device, connecting an input metal hose interface with a third connecting interface, connecting a refrigerant output metal hose interface with a fourth connecting interface, and opening a stop valve corresponding to the connecting interface;
i1-2, heating the lubricating oil in the auxiliary oil tank by an oil injection heater to reduce viscosity, pressurizing by an oil pump, and flowing into the monomer condenser testing device through an oil injection mass flowmeter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose in sequence; injecting lubricating oil at an inlet of the condenser to be tested through the first connecting interface, mixing the lubricating oil with the refrigerant, and feeding the lubricating oil into the condenser to be tested; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
i1-3, passing the refrigerant-lubricating oil mixture flowing out of the condenser to be tested through the oil outlet pipeline and the heating evaporator, and entering the device through the input metal hose at the third connection interface; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator, and the refrigerant separated by the oil separator flows out of the fourth connecting interface through the refrigerant output metal hose and returns to the monomer condenser testing device to complete refrigerant circulation; the separated lubricating oil is heated by an oil return heater to reduce viscosity, and then is stored in a main oil tank after passing through an oil return mass flow meter and a third stop valve, so that the lubricating oil circulation is completed;
i1-4. oil injection mass flowmeter test oil injection mass flow is mo,inThe oil return mass flow measured by the oil return mass flowmeter is mo,ex(ii) a And (3) after the system runs stably, completing the test, and obtaining the stagnant oil mass of the condenser to be tested, the downstream pipeline and the heating evaporator in the steps i 1-1-i 1-3: OR (cond5+ cond5ds) ═ Mo,in-Mo,ex；
i1-5, after the test is finished, executing a step h-5 to clean lubricating oil;
i1-6. second test: a lubricating oil output metal hose interface of the device is connected with a second connecting interface of the single condenser testing device, an input metal hose interface is connected with a third connecting interface, a refrigerant output metal hose interface is connected with a fourth connecting interface C5, and a stop valve corresponding to the connecting interface is opened;
i1-7, heating and viscosity reduction of the lubricating oil in the auxiliary oil tank by an oil injection heater, pressurizing by an oil pump, and flowing into the monomer condenser testing device through an oil injection mass flowmeter, a one-way valve, an oil injection needle valve and a lubricating oil output metal hose in sequence; the lubricating oil is injected at the outlet of the condenser to be measured through the second connecting interface and is mixed with the refrigerant; part of the lubricating oil flows back to the auxiliary oil tank through a lubricating oil bypass needle valve in a bypass mode;
i1-8, passing the mixed refrigerant-lubricating oil mixture through a lower oil pipeline and a heating evaporator, and entering the device at a third connection interface through an input metal hose; at the moment, the second stop valve is opened, and the sampling stop valve and the first bypass stop valve are closed; the mixture sequentially flows through the first stop valve, the tube-shaped viewing mirror, the second stop valve and the overheating heater and then reaches the oil separator, the refrigerant separated by the oil separator 106 flows out of the fourth connection interface through the refrigerant output metal hose and returns to the monomer condenser testing device, and the refrigerant circulation is completed; the separated lubricating oil is heated by an oil return heater to reduce viscosity, and then is stored in a main oil tank after passing through an oil return mass flow meter and a third stop valve, so that the lubricating oil circulation is completed;
i1-9. after the system runs stably, the test is finished; and (5) obtaining the stagnant oil amount of the downstream pipeline and the heating evaporator in steps i 1-6-i 1-8: OR (cond5ds) ═ Mo,in-Mo,ex；
i1-10, calculating the oil stagnation amount of the condenser to be measured: OR (cond5) ═ OR (cond5+ cond5ds) -OR (cond5 ds);
i1-11. operating condition control scheme: in accordance with step b-9;
i2. mixed sampling method
i2-1, after the system runs stably, closing valves at two ends of the condenser to be tested, and simultaneously stopping running the single condenser testing device to ensure that the refrigerant and the lubricating oil in the components are all stopped in the condenser to be tested;
i2-2. input metal hose interface and sheet of deviceThe first connecting interface of the body condenser testing device is connected, and the lubricating oil output metal hose interface is connected with the second connecting interface and is connected with the opening stop valve corresponding to the interface; opening the sampling stop valve, closing the second stop valve and the first bypass stop valve, placing the sampling container in a water bath container filled with liquid nitrogen, enabling the refrigerant gas in the condenser to be detected to enter the low-pressure sampling container, and weighing to obtain the refrigerant content M after the collection is finishedR；
i2-3, closing the third stop valve and the fourth stop valve, and filling a certain mass of liquid refrigerant, marked as M, into the main oil tank cleaned in advance through the first vacuumizing and filling interface1；
i2-4, closing the sampling stop valve, the second stop valve, the fifth stop valve and the lubricating oil bypass needle valve, opening the first bypass stop valve and the second bypass stop valve of the bypass branch assembly, opening the third stop valve, the fourth stop valve and the oil injection needle valve, and simultaneously opening the oil pump, so that the refrigerant in the main oil tank is mixed with the lubricating oil retained by the condenser to be tested in a flowing manner by the oil pump;
i2-5, operating for a period of time to uniformly mix the refrigerant and the lubricating oil, closing the first bypass stop valve and the second bypass stop valve, and opening the sampling stop valve to sample in the sampling container; after sampling, determining the oil content, namely the mass fraction of the lubricating oil, which is marked as c, according to the sample;
f2-6, calculating the retention of the lubricating oil: OR (cond5) ═ cM1/(1-c)。
CN202010067214.6A 2020-01-20 2020-01-20 Movable oil-containing refrigerant testing device and method Expired - Fee Related CN111141541B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0875282A (en) * 1994-09-09 1996-03-19 Kobe Steel Ltd Separate type heat pump
CN1563862A (en) * 2004-03-25 2005-01-12 上海交通大学 On-line continuous oiling device having coolant flowing, boiling and heat exchanging measurement loop
CN1786709A (en) * 2005-11-02 2006-06-14 浙江大学 System for testing performance of refrigerating agent containing oil
CN101545880A (en) * 2009-04-30 2009-09-30 上海交通大学 Device for measuring trans-critical cycle heat exchange of CO2-oil mixture
CN101852751A (en) * 2009-04-03 2010-10-06 浙江大学 Tube refrigerant oil-bearing evaporation/condensation heat transfer testing integrated device and test method thereof
CN101852750A (en) * 2009-04-03 2010-10-06 浙江大学 Continuous oil injection loop for testing evaporation/condensation heat transfer characteristic of refrigerant and oil injection method thereof
CN108168166A (en) * 2018-02-01 2018-06-15 青岛绿环工业设备有限公司 A kind of low temperature auxiliary refrigerant recovery system
CN109374831A (en) * 2018-10-30 2019-02-22 天津商业大学 Refrigerant and lubricating oil intermiscibility experimental apparatus for testing

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0875282A (en) * 1994-09-09 1996-03-19 Kobe Steel Ltd Separate type heat pump
CN1563862A (en) * 2004-03-25 2005-01-12 上海交通大学 On-line continuous oiling device having coolant flowing, boiling and heat exchanging measurement loop
CN1786709A (en) * 2005-11-02 2006-06-14 浙江大学 System for testing performance of refrigerating agent containing oil
CN101852751A (en) * 2009-04-03 2010-10-06 浙江大学 Tube refrigerant oil-bearing evaporation/condensation heat transfer testing integrated device and test method thereof
CN101852750A (en) * 2009-04-03 2010-10-06 浙江大学 Continuous oil injection loop for testing evaporation/condensation heat transfer characteristic of refrigerant and oil injection method thereof
CN101545880A (en) * 2009-04-30 2009-09-30 上海交通大学 Device for measuring trans-critical cycle heat exchange of CO2-oil mixture
CN108168166A (en) * 2018-02-01 2018-06-15 青岛绿环工业设备有限公司 A kind of low temperature auxiliary refrigerant recovery system
CN109374831A (en) * 2018-10-30 2019-02-22 天津商业大学 Refrigerant and lubricating oil intermiscibility experimental apparatus for testing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LORENZO CREMASCHI等: "Experimental investigation of oil retention in air conditioning systems", 《INTERNATIONAL JOURNAL OF REFRIGERATION》 *

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