CN201387379Y - Test device for testing quality and flow properties of refrigeration agent of throttling mechanism - Google Patents
Test device for testing quality and flow properties of refrigeration agent of throttling mechanism Download PDFInfo
- Publication number
- CN201387379Y CN201387379Y CN200920142236U CN200920142236U CN201387379Y CN 201387379 Y CN201387379 Y CN 201387379Y CN 200920142236 U CN200920142236 U CN 200920142236U CN 200920142236 U CN200920142236 U CN 200920142236U CN 201387379 Y CN201387379 Y CN 201387379Y
- Authority
- CN
- China
- Prior art keywords
- outlet
- inlet
- compressor
- pressure
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model relates to a test device for testing quality and flow properties of a refrigeration agent of a throttling mechanism. The test device is characterized in that the test device comprises a compressor, a frequency converter, an oil separator, a condenser, a reservoir, a cooling water tank, a subcooler, an electric heater, a dry filter, a second cut-off valve, a liquid glass, a pressure container, an evaporator, an electric heating tube and a control test device, wherein lubrication oil separated from the oil separator is communicated with an air inlet port of the compressor through a one-way valve, the condenser is cooled by the cooling water tank through a first water regulating valve, the subcooler is cooled by the cooling water tank through a second water regulating valve, the electric heater is serially connected with the dry filter, an outlet of the dry filter is connected with a first cut-off valve, the outlet of the first out-off valve is connected with an inlet of a tested throttling device L, the second cut-off valve is serially connected with the liquid glass, the inlet of the second cut-off valve is connected with the outlet of the tested throttle device L, the evaporator is internally arranged above the pressure container, the electric heating tube is internally arranged below the pressure container, the control test device can set the condensing pressure, degree of supercooling and dryness of the refrigeration agent arranged on the inlet of the tested throttling mechanism L, the evaporating pressure at the outlet and the return-air temperature of the compressor, and a temperature and pressure testing point is respectively arranged on air inlet and air outlet ports, the outlet of the subcooler and the pressure container.
Description
Technical field
The utility model patent relates to a kind of proving installation of refrigerant mass fluxes characteristic of throttle mechanism, especially a kind of proving installation of refrigerant mass fluxes characteristic of the throttle mechanism that is applied to testing air conditioner system and other refrigerating plants.
Background technology
Throttle mechanism is as the refrigerant flow regulating element of refrigeration system, and to the operation characteristic important influence of refrigerating plant, so the discharge characteristic research of throttle mechanism just seems extremely important.At present, generally adopt nitrogen to do the discharge characteristic experiment of throttle mechanism.But because nitrogen does not have phase transformation in the throttle mechanism throttling, and there is phase transformation in cold-producing medium in the throttle mechanism throttling, causing the family curve that records with nitrogen and actual cold-producing medium to record the result has than mistake, for better and refrigeration system coupling, it is necessary to adopt actual cold-producing medium to carry out the discharge characteristic experiment.
Summary of the invention
The purpose of this utility model is that a kind of proving installation of measuring the refrigerant mass fluxes characteristic of throttle mechanism will be provided, and this device goes for throttling mechanism and multiple cold-producing mediums such as R22, R134a such as the kapillary, restriction sleeve, heating power expansion valve, electric expansion valve of plurality of specifications.
In order to achieve the above object, the technical scheme that the utility model adopted is, it is a kind of proving installation of refrigerant mass fluxes characteristic of throttle mechanism, it is characterized in that: comprise the frequency converter of compressor and compressor, be equipped with temperature and pressure test point at the air intake opening and the exhausr port of compressor; Also comprise oil separator, its inlet is communicated with the exhausr port of compressor, and its isolated lubricated oil outlet is communicated with the air intake opening of compressor by retaining valve; Also comprise condenser, reservoir and cooling water tank, the inlet of condenser is communicated with the outlet of oil separator, its outlet is connected with the reservoir inlet, and cooling water tank cools off condenser by first water regulating valve, is provided with temperature and pressure test point in the reservoir exit; Also comprise subcooler, its inlet is communicated with the outlet of reservoir, and cooling water tank cools off subcooler by second water regulating valve, is provided with temperature and pressure test point in the outlet of subcooler; The electric heater and the device for drying and filtering that also comprise mutual series connection, the inlet of electric heater is communicated with the subcooler outlet, and the outlet of device for drying and filtering connects first stop valve, and the outlet of first stop valve connects the inlet of tested restriction device L; Also comprise second stop valve and the liquid-sighting glass of mutual series connection, the inlet of second stop valve connects the outlet of tested restriction device L; Also comprise pressure vessel, be located in the pressure vessel and be in the evaporator of top and be located at the electrothermal tube that is positioned at the below in the pressure vessel, the outlet of liquid-sighting glass is communicated with the inlet of evaporator, the outlet of evaporator is communicated with compressor inlet, is provided with temperature and pressure test point on pressure vessel; The control survey device that also comprises the suction temperature of the evaporating pressure in the condensing pressure that can set tested throttle mechanism L porch cold-producing medium, degree of supercooling, mass dryness fraction, exit and compressor.
Described control survey device comprises the PID regulator of the frequency of the power of power, electrothermal tube of aperture, the electric heater of aperture, second water regulating valve of scalable first water regulating valve and frequency converter; Also comprise the temperature of responding to above-mentioned each test point and pressure and signal inputed to the sensor of PID regulator, this sensor comprises pressure transducer and temperature sensor; The data acquisition module that also comprises the receiving sensor input signal carries out the A/D data conversion module of A/D data-switching with the signal of data acquisition module output and receives the computing machine of the output signal of A/D data conversion module.
Air intake opening and exhaust ports at described compressor are respectively equipped with rapid-acting coupling.
Cold water inlet at described cooling water tank is provided with ball-cock assembly, is provided with ball valve at its water delivering orifice.
The utility model advantage compared with prior art is, this device goes for the test of throttling mechanism such as the kapillary, restriction sleeve, heating power expansion valve, electric expansion valve of plurality of specifications and multiple cold-producing mediums such as R22, R134a, and the effect of test is complementary with actual refrigeration system.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present utility model;
Figure is the functional-block diagram of control survey device of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, 2, a kind of proving installation of refrigerant mass fluxes characteristic of throttle mechanism, characteristics of the present utility model are: comprise the frequency converter 1 of compressor 2 and compressor, be equipped with temperature T and pressure P test point at the air intake opening and the exhausr port of compressor.Also comprise oil separator 4, its inlet is communicated with the exhausr port of compressor, and its isolated lubricated oil outlet is communicated with the air intake opening of compressor by retaining valve, and it will separate with cold-producing medium from the lubricating oil that compressor is taken out of and lubricating oil is turned back to compressor; The refrigerant oil-bearing amount that assurance enters among the tested restriction device L is controlled in certain scope.Also comprise condenser 5, reservoir 6 and cooling water tank 16, the inlet of condenser is communicated with the outlet of oil separator, its outlet is connected with the reservoir inlet, cooling water tank cools off by 19 pairs of condensers of first water regulating valve, be provided with temperature T and pressure test point P in the reservoir exit, the model of first water regulating valve is SiemensAcvatix
TMSQX62; After gas and oil separated, cold-producing medium entered condenser and carries out condensation, becomes the liquid of High Temperature High Pressure.Also comprise subcooler 7, its inlet is communicated with the outlet of reservoir, and cooling water tank cools off by 20 pairs of subcoolers of second water regulating valve, is provided with temperature T and pressure P test point in the outlet of subcooler, and the model of second water regulating valve is BELIMO LR24-SR; The liquid of High Temperature High Pressure reaches the needed degree of supercooling of test after further cooling off through subcooler.The electric heater 8 and the device for drying and filtering 9 that also comprise mutual series connection, the outlet of the inlet of electric heater and subcooler is communicated with, and the outlet that the outlet of device for drying and filtering connects first stop valve, 10, the first stop valves connects the inlet of tested restriction device L; Cold-producing medium through further cooling becomes gas-liquid two-phase through electric heater heating back by liquid state, has reached and has tested required mass dryness fraction.Comprise that also the inlet of second stop valve 11 of mutual series connection and liquid-sighting glass 12, the second stop valves connects the outlet of tested restriction device L; It is convenient to the installation of tested restriction device L and the flow state of observing cold-producing medium.Also comprise pressure vessel 14, be located in the pressure vessel and be in the evaporator 13 of top and be located at the electrothermal tube 15 that is positioned at the below in the pressure vessel, the outlet of liquid-sighting glass is communicated with the inlet of evaporator, the outlet of evaporator is communicated with compressor 2 air intake openings, is provided with temperature and pressure test point on pressure vessel; Pressure vessel receives the cold-producing medium from tested restriction device L, and this cold-producing medium absorbs the superheated vapor that heat becomes low-temp low-pressure, enters compressor at last, finishes whole refrigerant cycle.The control survey device that also comprises the suction temperature of the evaporating pressure in the condensing pressure that can set tested throttle mechanism L porch cold-producing medium, degree of supercooling, mass dryness fraction, exit and compressor.
In the present embodiment, the control survey device comprises the PID regulator 23 of the frequency of the power of power, electrothermal tube 15 of aperture, the electric heater 8 of aperture, second water regulating valve 20 of scalable first water regulating valve 19 and frequency converter 1, and the model of PID regulator is UT350; Also comprise temperature and the sensor 22 pressure and that signal is inputed to the PID regulator of responding to above-mentioned each test point, this sensor comprises pressure transducer and temperature sensor, the model of pressure transducer is STP09A2A0, and temperature sensor is copper-constantan thermocouple and Pt100 platinum resistance; The data acquisition module 24 that also comprises the receiving sensor input signal carries out the A/D data conversion module 25 of A/D data-switching with the signal of data acquisition module output and receives the computing machine 26 of the output signal of A/D data conversion module.Air intake opening and exhaust ports at compressor 2 are respectively equipped with rapid-acting coupling 3.Cold water inlet at cooling water tank 16 is provided with ball-cock assembly, is provided with ball valve 18 at its water delivering orifice.
During work, the high-temperature high-pressure refrigerant that compressor 2 is discharged is through oil separator 4, the lubricating oil that to take out of from compressor separates with cold-producing medium, and lubricating oil is turned back to the place, suction port of compressor, guarantees that the refrigerant oil-bearing amount that enters in the throttle mechanism is controlled at certain limit.After gas and oil separated, cold-producing medium entered water-cooled condenser 5 and carries out condensation, becomes the liquid of High Temperature High Pressure, enters reservoir 6, subcooler 7 then, and subcooler further cools off cold-producing medium, reached the needed throttle mechanism inlet of test degree of supercooling.Cold-producing medium continues to enter electric heater 8 and heats, make cold-producing medium become gas-liquid two-phase, reach the required mass dryness fraction of test and (when test, only one in degree of supercooling, the mass dryness fraction is set and controls by liquid state, subcooler 7 or the electric heater 8 that need not control this moment are only as coolant channel).Cold-producing medium enters tested restriction device L and carries out throttling, and the purpose of first and second stop valve 10,11 and liquid-sighting glass 12 is to be convenient to the dismounting of throttle mechanism and the flow state of observing cold-producing medium.In pressure vessel 15, absorb the superheated vapor that heat becomes low-temp low-pressure by the cold-producing medium that is come out by restriction device, enter compressor 2 at last, finish refrigerant cycle.
The control survey device is gathered the measurement of the heating power of all temperature T test points, pressure P test point and electric heater 8, electrothermal tube 15, by the PID regulator condensing pressure, degree of supercooling, mass dryness fraction, the evaporating pressure in exit and the parameters such as suction temperature of compressor of tested restriction device porch cold-producing medium are regulated, and measurand is gathered simulating signal by corresponding sensor 22 send into data acquisition module 24, become digital signal to send into computing machine 26 analog signal conversion through A/D modular converter 25 again and carry out data read.
When measuring the refrigerant flow of throttle mechanism, because the top in pressure vessel 14 is provided with evaporator 13, be second refrigerant liquid below, electrothermal tube 15 is installed under the second cold-producing medium liquid level, refrigerating capacity with electrical heating amount balanced system cooling system, the heating power of electrothermal tube adds that extraneous leaking heat is refrigerant system capacity, obtains refrigerant mass fluxes according to the Refrigerant State Parameters of turnover calorimeter by Theoretical Calculation then.
The control method of each parameter of refrigeration system is as follows:
1) condensing pressure adopts the PID regulator, controls the condensing pressure of condenser 5 by the aperture size of regulating first water regulating valve 19.When condensing pressure was too high, the aperture of first water regulating valve strengthened, otherwise aperture reduces.
2) degree of supercooling adopts the PID regulator, controls the degree of supercooling of subcooler 7 by the aperture size of regulating second water regulating valve 20.Served as cold spend hour, the aperture of second water regulating valve strengthens, otherwise aperture reduces.
3) mass dryness fraction adopts the PID regulator, controls the mass dryness fraction of cold-producing medium by the heating power of regulating electric heater 8; When mass dryness fraction was too small, heating power strengthened, otherwise heating power reduces.
4) evaporating pressure adopts the PID regulator, regulates compressor 2 air capacities by the frequency of regulating frequency converter 1, thereby realizes the adjusting to evaporating pressure; When evaporating pressure is too high, improve frequency, otherwise, reduce frequency.
5) suction temperature adopts the PID regulator, controls the suction temperature of compressor by the heating power of regulating electrothermal tube 15.When suction temperature was too small, heating power strengthened, otherwise heating power reduces.
Claims (4)
1, a kind of proving installation of refrigerant mass fluxes characteristic of throttle mechanism is characterized in that: comprise the frequency converter (1) of compressor (2) and compressor, be equipped with temperature and pressure test point at the air intake opening and the exhausr port of compressor; Also comprise oil separator (4), its inlet is communicated with the exhausr port of compressor, and its isolated lubricated oil outlet is communicated with the air intake opening of compressor by retaining valve (21); Also comprise condenser (5), reservoir (6) and cooling water tank (16), the inlet of condenser is communicated with the outlet of oil separator, its outlet is connected with the reservoir inlet, cooling water tank cools off condenser by first water regulating valve (19), is provided with temperature and pressure test point in the reservoir exit; Also comprise subcooler (7), its inlet is communicated with the outlet of reservoir, and cooling water tank cools off subcooler by second water regulating valve (20), is provided with temperature and pressure test point in the outlet of subcooler; The electric heater (8) and the device for drying and filtering (9) that also comprise mutual series connection, the inlet of electric heater is communicated with the subcooler outlet, and the outlet of device for drying and filtering connects first stop valve (10), and the outlet of first stop valve connects the inlet of tested restriction device L; Also comprise second stop valve (11) and the liquid-sighting glass (12) of mutual series connection, the inlet of second stop valve connects the outlet of tested restriction device L; Also comprise pressure vessel (14), be located in the pressure vessel and be in the evaporator (13) of top and be located at the electrothermal tube (15) that is positioned at the below in the pressure vessel, the outlet of liquid-sighting glass is communicated with the inlet of evaporator, the outlet of evaporator is communicated with compressor (2) air intake opening, is provided with temperature and pressure test point on pressure vessel; The control survey device that also comprises the suction temperature of the evaporating pressure in the condensing pressure that can set tested throttle mechanism L porch cold-producing medium, degree of supercooling, mass dryness fraction, exit and compressor.
2, the proving installation of the refrigerant mass fluxes characteristic of throttle mechanism according to claim 1 is characterized in that: described control survey device comprises the PID regulator (23) of the frequency of the power of power, electrothermal tube (15) of aperture, the electric heater (8) of aperture, second water regulating valve (20) of scalable first water regulating valve (19) and frequency converter (1); Also comprise the temperature of responding to above-mentioned each test point and pressure and signal inputed to the sensor (22) of PID regulator, this sensor comprises pressure transducer and temperature sensor; The data acquisition module (24) that also comprises the receiving sensor input signal carries out the A/D data conversion module (25) of A/D data-switching with the signal of data acquisition module output and receives the computing machine (26) of the output signal of A/D data conversion module.
3, the proving installation of the refrigerant mass fluxes characteristic of throttle mechanism according to claim 1 is characterized in that: air intake opening and exhaust ports at described compressor (2) are respectively equipped with rapid-acting coupling (3).
4, the proving installation of the refrigerant mass fluxes characteristic of throttle mechanism according to claim 1 is characterized in that: the cold water inlet at described cooling water tank (16) is provided with ball-cock assembly (17), is provided with ball valve (18) at its water delivering orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920142236U CN201387379Y (en) | 2009-04-01 | 2009-04-01 | Test device for testing quality and flow properties of refrigeration agent of throttling mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920142236U CN201387379Y (en) | 2009-04-01 | 2009-04-01 | Test device for testing quality and flow properties of refrigeration agent of throttling mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201387379Y true CN201387379Y (en) | 2010-01-20 |
Family
ID=41579913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920142236U Expired - Fee Related CN201387379Y (en) | 2009-04-01 | 2009-04-01 | Test device for testing quality and flow properties of refrigeration agent of throttling mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201387379Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846536A (en) * | 2010-05-27 | 2010-09-29 | 中国计量学院 | Device and method for measuring flow of electronic expansion valve |
| CN102679650A (en) * | 2012-05-31 | 2012-09-19 | 东南大学 | Safety control device and method for heat pump evaporation pressure |
| CN102967450A (en) * | 2012-10-23 | 2013-03-13 | 宁波奥克斯电气有限公司 | Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely |
| CN104913823A (en) * | 2015-06-09 | 2015-09-16 | 合肥晶弘电器有限公司 | Quality and flow testing system and method of refrigerating system |
| JP2019500586A (en) * | 2015-10-27 | 2019-01-10 | リンデ アクチエンゲゼルシャフトＬｉｎｄｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Test bypass for cooling systems with liquid containers with variable pressure values |
| CN110988025A (en) * | 2019-11-29 | 2020-04-10 | 杭州电子科技大学 | Intelligent testing system for performance of refrigerant |
| CN112879277A (en) * | 2019-11-29 | 2021-06-01 | 广东美芝制冷设备有限公司 | Testing method and testing device for electric appliance and compressor |
| CN113776863A (en) * | 2021-07-19 | 2021-12-10 | 威凯检测技术有限公司 | Comprehensive test device and method for remote refrigeration appliance |
| WO2022116611A1 (en) * | 2020-12-04 | 2022-06-09 | 广东美的暖通设备有限公司 | Compressor return air dryness measurement method, apparatus, device, and storage medium |
| CN115574495A (en) * | 2022-11-18 | 2023-01-06 | 江苏拓米洛环境试验设备有限公司 | Capillary tube calibration device system and method for variable working condition and variable flow |
| CN116858528A (en) * | 2023-09-04 | 2023-10-10 | 合肥通用机械研究院有限公司 | Compressor-expansion valve performance coupling matching test system and test method |
-
2009
- 2009-04-01 CN CN200920142236U patent/CN201387379Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846536A (en) * | 2010-05-27 | 2010-09-29 | 中国计量学院 | Device and method for measuring flow of electronic expansion valve |
| CN101846536B (en) * | 2010-05-27 | 2011-08-24 | 中国计量学院 | Device and method for measuring flow of electronic expansion valve |
| CN102679650A (en) * | 2012-05-31 | 2012-09-19 | 东南大学 | Safety control device and method for heat pump evaporation pressure |
| CN102967450A (en) * | 2012-10-23 | 2013-03-13 | 宁波奥克斯电气有限公司 | Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely |
| CN102967450B (en) * | 2012-10-23 | 2015-04-08 | 宁波奥克斯电气有限公司 | Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely |
| CN104913823A (en) * | 2015-06-09 | 2015-09-16 | 合肥晶弘电器有限公司 | Quality and flow testing system and method of refrigerating system |
| CN104913823B (en) * | 2015-06-09 | 2018-11-06 | 合肥晶弘电器有限公司 | A kind of refrigeration system mass-flow measurement system and test method |
| JP2019500586A (en) * | 2015-10-27 | 2019-01-10 | リンデ アクチエンゲゼルシャフトＬｉｎｄｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Test bypass for cooling systems with liquid containers with variable pressure values |
| CN110988025A (en) * | 2019-11-29 | 2020-04-10 | 杭州电子科技大学 | Intelligent testing system for performance of refrigerant |
| CN112879277A (en) * | 2019-11-29 | 2021-06-01 | 广东美芝制冷设备有限公司 | Testing method and testing device for electric appliance and compressor |
| CN112879277B (en) * | 2019-11-29 | 2023-03-14 | 广东美芝制冷设备有限公司 | Testing method and testing device for electric appliance and compressor |
| WO2022116611A1 (en) * | 2020-12-04 | 2022-06-09 | 广东美的暖通设备有限公司 | Compressor return air dryness measurement method, apparatus, device, and storage medium |
| CN113776863A (en) * | 2021-07-19 | 2021-12-10 | 威凯检测技术有限公司 | Comprehensive test device and method for remote refrigeration appliance |
| CN113776863B (en) * | 2021-07-19 | 2024-03-19 | 威凯检测技术有限公司 | Comprehensive test device and method for remote refrigeration appliance |
| CN115574495A (en) * | 2022-11-18 | 2023-01-06 | 江苏拓米洛环境试验设备有限公司 | Capillary tube calibration device system and method for variable working condition and variable flow |
| CN116858528A (en) * | 2023-09-04 | 2023-10-10 | 合肥通用机械研究院有限公司 | Compressor-expansion valve performance coupling matching test system and test method |
| CN116858528B (en) * | 2023-09-04 | 2023-12-05 | 合肥通用机械研究院有限公司 | Compressor-expansion valve performance coupling matching test system and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201387379Y (en) | Test device for testing quality and flow properties of refrigeration agent of throttling mechanism | |
| CN104807113B (en) | A kind of air conditioner outdoor machine defrosting decision method | |
| CN102032699B (en) | Refrigeration cycle apparatus and hot water heater | |
| CN107076475B (en) | Method for operating a vapor compression system having a receiver | |
| CN101520376B (en) | Testing device for detecting and controlling lubricating oil circulation rate of refrigerating system | |
| CN103097835A (en) | A method for operating a vapour compression system using a subcooling value | |
| CN108593328A (en) | A kind of convenient refrigerator heat exchanger performance test system of flow-rate adjustment | |
| CN109030055B (en) | CO2Performance test system and test method for air conditioner heat exchanger | |
| CN103033356B (en) | The Performance Test System of coaxial heat exchanger and method of testing in air conditioning for automobiles | |
| CN101551682A (en) | Intelligent high-low temperature test box temperature control system | |
| CN105181313A (en) | Performance contrast experiment table of thermal expansion valves | |
| CN105206162A (en) | Performance contrast experiment table for different throttle mechanisms | |
| Taib et al. | Performance analysis of a domestic refrigerator | |
| CN201425583Y (en) | Evaporation/condensation heat transmission testing integrated device in micro pipe diameter | |
| CN103776186A (en) | Turbine refrigerator | |
| CN112781862A (en) | Refrigerant valve performance test system | |
| CN101749804A (en) | Air conditioner and control method thereof | |
| CN107246975A (en) | A kind of flow refrigerator with adjustable heat exchanger performance test system | |
| CN202915613U (en) | Fluid cold source system using condensing heat to self-adapt to refrigerating capacity | |
| CN100389320C (en) | Device for testing flowing boiling heat exchanging performance inside of coolant pipe | |
| CN114658644A (en) | Two-stage compression two-stage throttling volumetric refrigerant compressor performance test system and test method | |
| CN110364069B (en) | Multi-adjustment type refrigeration experiment table and experiment method | |
| CN204187901U (en) | Refrigerator heat exchanger performance measure and control device | |
| CN208780481U (en) | CO2Air-conditioning heat exchanger Performance Test System | |
| CN205049328U (en) | Thermostatic expansion valve performance contrast laboratory bench |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20140401 |