CN110154674B - Oil content testing method for air conditioning system - Google Patents

Oil content testing method for air conditioning system Download PDF

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Publication number
CN110154674B
CN110154674B CN201910258846.8A CN201910258846A CN110154674B CN 110154674 B CN110154674 B CN 110154674B CN 201910258846 A CN201910258846 A CN 201910258846A CN 110154674 B CN110154674 B CN 110154674B
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suction pipeline
air suction
compressor
air
glass tube
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CN110154674A (en
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魏成龙
郝义国
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Wuhan Industrial Technology Research Institute Of Geo Resoures Environment Co ltd
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Wuhan Industrial Technology Research Institute Of Geo Resoures Environment Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00585Means for monitoring, testing or servicing the air-conditioning
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The invention discloses an oil content testing method of an air conditioning system, and relates to the technical field of oil quantity detection of the air conditioning system, in particular to an evaporator and an observation box, wherein an expansion valve is fixedly arranged above the evaporator, a double-sided thread end is integrally arranged at the upper end of a first air suction pipeline, the observation box is positioned above the double-sided thread end, and the outlet end of a compressor is connected with one end of an exhaust pipeline. According to the oil content testing method of the air conditioning system, the air inlet is in double-sided rotary connection with the upper end of the first air suction pipeline, the sealing performance between the first air suction pipeline and the glass tube is improved, the phenomenon of gas leakage at the joint of the first air suction pipeline and the glass tube is avoided, liquid refrigerants flow to the measuring instrument through the oil delivery pipe, the measuring instrument is mainly used for detecting the circulation rate of the liquid refrigerants, the device forms a closed loop capable of circularly detecting, the oil content condition of an air conditioning compressor is favorably detected in real time, and the problem that compressor oil is excessive or too little is avoided.

Description

Oil content testing method for air conditioning system
Technical Field
The invention relates to the technical field of oil mass detection of air-conditioning systems, in particular to an oil content testing method of an air-conditioning system.
Background
The air conditioning system is a system for processing the temperature, humidity, cleanliness and airflow speed of indoor air by a manual method, and can make certain places obtain air with certain temperature, humidity and air quality so as to meet the requirements of users and production processes and improve labor hygiene and indoor climate conditions.
The oil quantity of the existing automobile air conditioning system is generally obtained by a compressor manufacturer under a monomer test working condition according to the monomer performance requirement of the compressor, and in order to ensure the normal operation of the compressor and reduce the reliability risk of the compressor, excessive compressor oil is added or the compressor oil is directly reduced in order to improve the refrigerating capacity of the air conditioning system.
When the oil content of an air conditioning compressor is excessive, the oil content of the system is high, the proportion of a refrigerant is reduced in the heat exchange process of the system, the heat exchange capacity of the air conditioning system is reduced, when the oil content of the compressor is insufficient, the flowability of the air conditioning system is low, and insufficient compressor oil does not return to the interior of a cavity of the compressor, so that the self lubrication of the compressor is influenced, the compressor is further abraded, the service life of the compressor is shortened, and the oil content testing method of the air conditioning system is provided for solving the problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an oil content testing method of an air conditioning system, which solves the problems that when the air conditioning compressor oil provided in the background art is excessive, the oil content of the system is high, the proportion of a refrigerant is reduced in the heat exchange process of the system, the heat exchange capacity of the air conditioning system is reduced, and when the oil content of the compressor is insufficient, the fluidity of the air conditioning system is low, and insufficient compressor oil does not return to the interior of a cavity of the compressor, so that the self lubrication of the compressor is influenced, the compressor is further abraded, and the service life of the compressor is shortened.
In order to realize the purpose, the invention is realized by the following technical scheme: the utility model provides an air conditioning system oil content test method, includes evaporimeter and observation box, the top fixed mounting of evaporimeter has the expansion valve, and upper end one side of expansion valve is connected with first air suction pipeline, the upper end integration of first air suction pipeline is provided with the double-sided screw thread end, the observation box is located the top of double-sided screw thread end, the top of observation box is connected with the one end of second air suction pipeline, and the other end of second air suction pipeline is connected with the compressor, the exit end of compressor is connected with exhaust pipe's one end, and exhaust pipe's the other end is connected with the entrance point of condenser, the exit end of condenser is connected with the one end of defeated oil pipe, and the measuring apparatu is installed to the other end of defeated oil pipe.
Optionally, the observation box includes glass pipe, rubber circle, disc, cradling piece, air inlet, gas outlet, ring interlayer and fillet of screw, the rubber circle has all been cup jointed in the upper and lower both ends outside of glass pipe, and the outside fixed mounting of rubber circle has the disc, the outer skin weld of disc has the cradling piece, the lower extreme integration of glass pipe is provided with the air inlet, and the upper end integration of glass pipe is provided with the gas outlet, the air inlet has the ring interlayer with the equal fixed mounting in inside of gas outlet, and the outer wall of ring interlayer and the inner wall of gas outlet all are provided with the fillet of screw.
Optionally, the first air suction pipeline is in threaded connection with the glass tube through the double-sided threaded end and the air inlet, and the center line of the annular interlayer and the center line of the air inlet are located on the same horizontal line.
Optionally, the outer diameter of the glass tube is equal to the inner diameter of the rubber ring, the outer surface of the rubber ring is attached to the inner surface of the disc, the support rods are distributed in a triangular mode along the outer surface of the rubber ring, and the support rods are parallel to each other.
Optionally, the observation box is connected with an interface end of the compressor through a second suction pipeline, and an outlet end of the compressor is connected with an interface end of the condenser through a discharge pipeline.
Optionally, the measuring instrument, the condenser and the expansion valve are connected by pipelines, and the exhaust pipelines are connected by exhaust pipelines.
The invention provides a method for testing the oil content of an air conditioning system, which has the following beneficial effects:
1. according to the method for testing the oil content of the air conditioning system, the glass tube and the first air suction pipeline in the device are fixed in a threaded connection mode, one side of the double-sided threaded end is attached to the threaded ring of the outer wall of the circular interlayer, the other side of the double-sided threaded end is attached to the threaded ring of the inner wall of the air inlet, and the glass tube is rotated clockwise, so that the air inlet in the device is connected with the upper end of the first air suction pipeline in a double-sided screwing mode, the sealing performance between the first air suction pipeline and the glass tube is improved, and the phenomenon of gas leakage at the connection position of the first air suction pipeline and the glass tube is avoided;
2. according to the oil content testing method of the air conditioning system, the outer diameter of the glass tube is equal to the inner diameter of the rubber ring, the glass tube is transparent, so that a user can directly observe the inner environment of the glass tube, the rubber ring, the disc and the support rod are mainly used for protecting the glass tube, the glass tube is prevented from being broken due to external impact, the safety of the glass tube in the using process is improved, and the service life of the glass tube is prolonged to a certain extent;
3. the compressor can compress gaseous refrigerants, the compressed gaseous refrigerants are converted into liquid refrigerants through the condenser, the liquid refrigerants after being converted fall into the glass tube when flowing backwards, the oil return performance of the device can be judged by observing whether the liquid refrigerants appear in the glass tube, the compressor compresses sucked low-temperature and low-pressure refrigerant steam to improve temperature and pressure, the refrigerants in the glass tube move, and the aim of refrigeration is achieved through heat-power conversion;
4. according to the oil content testing method of the air conditioning system, liquid refrigerants flow into the measuring instrument through the oil conveying pipe, the measuring instrument is mainly used for detecting the circulation rate of the liquid refrigerants, the engine oil after detection is finished enters the evaporator through the oil conveying pipe and the expansion valve, high-pressure liquid refrigerants enter the evaporator through the expansion valve, the liquid refrigerants are enabled to be fog-shaped due to the atomization effect of the expansion valve, the fog-shaped refrigerants are changed into gas states under the low-pressure condition, the gas refrigerants enter the glass pipe through the first air suction pipeline again, circulation detection of the device is completed, the device forms a closed loop capable of circulation detection, the oil content condition of an air conditioning compressor can be detected in real time, and the problem that the compressor oil is excessive or too little is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the working process of the present invention;
FIG. 3 is a schematic view of the connection structure of the glass tube and the rubber ring according to the present invention;
FIG. 4 is a schematic view of the internal structure of the air outlet according to the present invention.
In the figure: 1. an evaporator; 2. an expansion valve; 3. a first suction line; 4. a double-sided threaded end; 5. an observation box; 6. a glass tube; 7. a rubber ring; 8. a disc; 9. a support rod; 10. an air inlet; 11. an air outlet; 12. a circular ring interlayer; 13. a thread ring; 14. a second aspiration line; 15. a compressor; 16. an exhaust line; 17. a condenser; 18. an oil delivery pipe; 19. and (7) a measuring instrument.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 4, the present invention provides a technical solution: a method for testing oil content of an air conditioning system comprises an evaporator 1 and an observation box 5, wherein an expansion valve 2 is fixedly installed above the evaporator 1, a first air suction pipeline 3 is connected to one side of the upper end of the expansion valve 2, double-sided thread end heads 4 are integrally arranged at the upper end of the first air suction pipeline 3, the observation box 5 is located above the double-sided thread end heads 4, the observation box 5 comprises a glass pipe 6, a rubber ring 7, a disc 8, a support rod 9, an air inlet 10, an air outlet 11, a ring interlayer 12 and a thread ring 13, the rubber ring 7 is sleeved on the outer sides of the upper end and the lower end of the glass pipe 6, the disc 8 is fixedly installed on the outer side of the rubber ring 7, the support rod 9 is welded on the outer surface of the disc 8, the air inlet 10 is integrally arranged at the lower end of the glass pipe 6, the air outlet 11 is integrally arranged at the upper end of the glass pipe 6, the ring interlayer 12 is fixedly installed inside the air inlet 10 and the air outlet 11, the outer wall of the ring interlayer 12 and the inner wall of the air inlet 11 are respectively provided with the thread ring 13, when the device is used, the device, the lower end of the first air suction pipeline 3 is horizontally connected with the double-sided thread end head of the glass pipe 4 through the thread ring 10, refrigerant at the inner wall of the glass pipe 10, the inner wall of the glass pipe 6, the double-sided thread end head of the glass pipe 6, the glass pipe 6 is horizontally connected with the double-sided thread ring 10, then, the glass tube 6 rotates clockwise, and the air inlet 10 in the device is in double-sided rotary connection with the upper end of the first air suction pipeline 3, so that the sealing property between the first air suction pipeline 3 and the glass tube 6 is improved, and the phenomenon of air leakage at the connection part of the first air suction pipeline 3 and the glass tube 6 is avoided;
the outer diameter of the glass tube 6 is equal to the inner diameter of the rubber ring 7, the outer surface of the rubber ring 7 is attached to the inner surface of the disc 8, the support rods 9 are distributed in a triangular mode along the outer surface of the rubber ring 7, the support rods 9 are parallel to each other, and the glass tube 6 is transparent, so that a user can directly observe the inner environment of the glass tube 6;
the upper side of the observation box 5 is connected with one end of a second air suction pipeline 14, the other end of the second air suction pipeline 14 is connected with a compressor 15, the outlet end of the compressor 15 is connected with one end of an exhaust pipeline 16, the other end of the exhaust pipeline 16 is connected with the inlet end of a condenser 17, the observation box 5 is connected with the interface end of the compressor 15 through the second air suction pipeline 14, the outlet end of the compressor 15 is connected with the interface end of the condenser 17 through the exhaust pipeline 16, the lower end of the second air suction pipeline 14 is connected with an air inlet 10 at the upper end of the glass tube 6 in a similar manner, gaseous refrigerant in the glass tube 6 enters the compressor 15 through the second air suction pipeline 14, the compressor 15 with the MOPAR type can compress the gaseous refrigerant, the compressed gaseous refrigerant is converted into liquid refrigerant through the condenser 17, the converted liquid refrigerant falls into the glass tube 6 when the converted liquid refrigerant flows backwards, therefore, whether the liquid refrigerant exists in the glass tube 6 or not can be observed, the oil return performance of the device can be judged, and the compressor 15 can improve the temperature and the pressure of the sucked low-temperature and the low-pressure refrigerant by compression and the heat power conversion to achieve the purpose of refrigerating;
the outlet end of the condenser 17 is connected with one end of an oil conveying pipe 18, the other end of the oil conveying pipe 18 is provided with a measuring instrument 19, the measuring instrument 19 is connected with the condenser 17 and the expansion valve 2 through pipelines, two exhaust pipelines 16 are arranged, the space between the measuring instrument 19 and the condenser 17 and the space between the expansion valve 2 and the measuring instrument 19 are connected through the exhaust pipelines 16, the compressor 15 compresses the gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant is sent to the condenser 17 with the model of JGLQ, the condenser 17 is usually arranged on an air conditioner outdoor unit, the condenser 17 radiates heat to form normal-temperature and high-pressure liquid refrigerant, the liquid refrigerant flows into the measuring instrument 19 through the oil conveying pipe 18, the measuring instrument 19 is mainly used for detecting the circulation rate of the liquid refrigerant, the engine oil is detected and then enters the evaporator 1 through the oil conveying pipe 18 and the expansion valve 2, the high-pressure liquid refrigerant enters the evaporator 1 through the expansion valve 2, the liquid refrigerant is converted into a fog-like state under the low-pressure condition, and the gas phase enters the interior of the glass pipe 6 through the first suction pipeline 3 again, and the circulation detection of the device is completed.
In conclusion, when the oil content testing method of the air conditioning system is used, the lower end of the first air suction pipeline 3 is connected to the expansion valve 2, a gaseous refrigerant enters the inside of the glass tube 6 through the first air suction pipeline 3, the glass tube 6 and the first air suction pipeline 3 are fixed in a threaded connection mode, the air inlet 10 at the lower end of the glass tube 6 is aligned to the double-threaded end 4 at the upper end of the first air suction pipeline 3, one side of the double-threaded end 4 is attached to the threaded ring 13 on the outer wall of the circular interlayer 12, the other side of the double-threaded end 4 is attached to the threaded ring 13 on the inner wall of the air inlet 10, then the glass tube 6 is rotated clockwise, the air inlet 10 and the upper end of the first air suction pipeline 3 are connected in a double-sided screwing mode in the device, and the phenomenon of air leakage at the connection position of the first air suction pipeline 3 and the glass tube 6 is avoided, similarly, the lower end of the second suction pipeline 14 is connected to the air inlet 10 at the upper end of the glass tube 6, the gaseous refrigerant inside the glass tube 6 enters the inside of the compressor 15 through the second suction pipeline 14, the compressor 15 with the type of MOPAR can compress the gaseous refrigerant, the compressed gaseous refrigerant is converted into a liquid refrigerant through the condenser 17, and the liquid refrigerant after conversion falls inside the glass tube 6 when flowing backwards, so that the oil return performance of the device can be judged by observing whether the liquid refrigerant exists inside the glass tube 6, the compressor 15 compresses the gaseous refrigerant into the high-temperature high-pressure gaseous refrigerant, and then the high-temperature high-pressure gaseous refrigerant is sent to the condenser 17 with the type of JGLQ, the condenser 17 is usually installed on an outdoor unit of an air conditioner, the condenser 17 turns into the normal-temperature high-pressure liquid refrigerant after heat dissipation, the liquid refrigerant flows into the measuring instrument 19 through the oil pipeline 18, and the measuring instrument 19 is mainly used for detecting the circulation rate of the liquid refrigerant, after the engine oil detection is finished, the engine oil enters the evaporator 1 through the oil pipeline 18 and the expansion valve 2, which is the working principle of the device.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (1)

1. An oil content testing method of an air conditioning system comprises an evaporator (1) and an observation box (5), and is characterized in that: the evaporator is characterized in that an expansion valve (2) is fixedly mounted above the evaporator (1), a first air suction pipeline (3) is connected to one side of the upper end of the expansion valve (2), a double-thread end socket (4) is integrally arranged at the upper end of the first air suction pipeline (3), an observation box (5) is positioned above the double-thread end socket (4), one end of a second air suction pipeline (14) is connected to the upper end of the observation box (5), the other end of the second air suction pipeline (14) is connected with a compressor (15), the outlet end of the compressor (15) is connected with one end of an exhaust pipeline (16), the other end of the exhaust pipeline (16) is connected with the inlet end of a condenser (17), the outlet end of the condenser (17) is connected with one end of an oil conveying pipe (18), a measuring instrument (19) is mounted at the other end of the oil conveying pipe (18), the observation box (5) comprises a glass pipe (6), a rubber ring (7), a disc (8), a support rod (9), an air inlet (10), an air outlet (11), a circular ring interlayer (12) and a disc (13), rubber ring (7) is fixedly welded at the outer side of the glass pipe (6), and a rubber ring (8) is welded at the outer side of the glass pipe (7), and a support rod (8) is welded on the outer side of the glass pipe (8), the lower end of the glass tube (6) is integrally provided with an air inlet (10), the upper end of the glass tube (6) is integrally provided with an air outlet (11), the interiors of the air inlet (10) and the air outlet (11) are fixedly provided with a circular ring interlayer (12), the outer wall of the circular ring interlayer (12) and the inner wall of the air outlet (11) are respectively provided with a threaded ring (13), the first air suction pipeline (3) is in threaded connection with the glass tube (6) through a double-sided threaded end (4) and the air inlet (10), the central line of the circular ring interlayer (12) and the central line of the air inlet (10) are positioned on the same horizontal line, the outer diameter of the glass tube (6) is equal to the inner diameter of the rubber ring (7), the outer surface of the rubber ring (7) and the inner surface of the disc (8) are attached, the support rods (9) are distributed in a triangular shape along the outer surface of the rubber ring (7), the support rods (9) are parallel to each other, the observation box (5) is connected with the interface end of the compressor (15) through a second air suction pipeline (14), the observation box is connected with the compressor (15), the compressor end is connected with an expansion valve (17) and the condenser (17) is connected with the condenser end of the condenser (17), and the exhaust pipelines (16) are provided with two exhaust pipelines, and the space between the measuring instrument (19) and the condenser (17) and the space between the expansion valve (2) and the measuring instrument (19) are connected through the exhaust pipelines (16), the test method comprises the following steps: firstly, the lower end of a first air suction pipeline (3) is connected to an expansion valve (2), gaseous refrigerant enters the inside of a glass tube (6) through the first air suction pipeline (3), the glass tube (6) and the first air suction pipeline (3) are fixed in a threaded connection mode, an air inlet (10) at the lower end of the glass tube (6) is aligned to a double-sided threaded end (4) at the upper end of the first air suction pipeline (3), one side of the double-sided threaded end (4) is attached to a threaded ring (13) on the outer wall of a circular ring interlayer (12), the other side of the double-sided threaded end (4) is attached to the threaded ring (13) on the inner wall of the air inlet (10), then the glass tube (6) rotates clockwise, the air inlet (10) is connected with the upper end of the first air suction pipeline (3) in a double-sided rotary mode, the phenomenon that gas leakage occurs at the connection position of the first air suction pipeline (3) and the glass tube (6) is avoided, the phenomenon that the gas leakage occurs at the connection position of the first air suction pipeline (6) and the gaseous refrigerant (15) enters a liquid refrigerant compressor after the gaseous refrigerant (PAR) is compressed, the gaseous refrigerant enters the internal compressor (15) through a second air suction pipeline (14), and then the gaseous refrigerant is compressed, the gaseous refrigerant is converted into a liquid refrigerant (15) which can be compressed and then compressed refrigerant, the liquid refrigerant which can be compressed refrigerant after the gaseous refrigerant is completely compressed, therefore, whether the oil return performance of the liquid refrigerant judgment device appears or not in the glass tube (6) is observed, the compressor (15) compresses the gaseous refrigerant into the high-temperature high-pressure gaseous refrigerant, then the high-temperature high-pressure gaseous refrigerant is sent to the condenser (17) with the model of JGLQ, the condenser (17) is installed on an air conditioner outdoor unit, the condenser (17) dissipates heat to form the normal-temperature high-pressure liquid refrigerant, the liquid refrigerant flows into the measuring instrument (19) through the oil delivery tube (18), and the measuring instrument (19) is used for detecting the circulation rate of the liquid refrigerant.
CN201910258846.8A 2019-04-01 2019-04-01 Oil content testing method for air conditioning system Active CN110154674B (en)

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Application Number Priority Date Filing Date Title
CN201910258846.8A CN110154674B (en) 2019-04-01 2019-04-01 Oil content testing method for air conditioning system

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Application Number Priority Date Filing Date Title
CN201910258846.8A CN110154674B (en) 2019-04-01 2019-04-01 Oil content testing method for air conditioning system

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CN110154674B true CN110154674B (en) 2023-03-28

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010085067A (en) * 2008-10-02 2010-04-15 Denso Corp Refrigerating cycle device
CN203298817U (en) * 2013-04-25 2013-11-20 郑州凌达压缩机有限公司 Test system for oil content of air-conditioning system
CN103573604B (en) * 2013-10-31 2015-11-18 广东美芝制冷设备有限公司 For the measuring device of compressor assembly and the method for measurement of refrigerant oil content
JP6417966B2 (en) * 2015-01-26 2018-11-07 株式会社デンソー Refrigeration cycle equipment
CN106403418B (en) * 2016-11-07 2022-03-08 广州天河兰石技术开发有限公司 Oil content control device for testing refrigeration components

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