CN104913823B - A kind of refrigeration system mass-flow measurement system and test method - Google Patents
A kind of refrigeration system mass-flow measurement system and test method Download PDFInfo
- Publication number
- CN104913823B CN104913823B CN201510316242.6A CN201510316242A CN104913823B CN 104913823 B CN104913823 B CN 104913823B CN 201510316242 A CN201510316242 A CN 201510316242A CN 104913823 B CN104913823 B CN 104913823B
- Authority
- CN
- China
- Prior art keywords
- refrigeration system
- refrigerant
- compressor
- temperature
- evaporator
- 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.)
- Active
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 91
- 238000005259 measurement Methods 0.000 title claims abstract description 28
- 238000010998 test method Methods 0.000 title claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 72
- 230000001105 regulatory effect Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000000691 measurement method Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to technical field of refrigeration equipment more particularly to a kind of refrigeration system mass-flow measurement systems and test method.Refrigeration system mass-flow measurement system includes refrigeration system, the evaporator of the refrigeration system and the separated setting of throttling set, and the air entry of the evaporator is connected with refrigerant feeding mechanism, and the exhaust outlet of throttling set is communicated with refrigerant collection device；The first regulating valve is provided between the evaporator and compressor of refrigeration system, and setting is respectively arranged with first pressure detection device and second pressure detection device at the both ends of compressor.Meanwhile present invention also provides the refrigeration system mass-flow measurement methods suitable for above-mentioned test system.By above structure and method, the application is realized using simple structure, is accurately and effectively tested the mass flow of refrigeration system.
Description
Technical field
The present invention relates to technical field of refrigeration equipment more particularly to a kind of refrigeration system mass-flow measurement system and tests
Method.
Background technology
Currently, equipment used in test refrigerator performance can generally provide the temperature data of system each point, some can be carried
For inhaling, the pressure data set is ranked, but the mass flow of refrigerant is lacked and indirectly calculates data and direct measurement side
The equipment or instrument of method, existing several test refrigeration system mass flows is all sufficiently expensive or heavy.However quality stream simultaneously
It is again particularly important that data, which are measured, for refrigeration engineers.This data relationship is gone to the performance and efficiency of refrigeration system
When designing refrigeration system in the industry, because that can not obtain this data, usual way is fixed numbers, by adjusting evaporating temperature and is opened
The machine time carrys out the refrigerating capacity of regulating system.
In view of the above-mentioned problems, we need a kind of refrigeration system quality that can accurately measure refrigeration system mass flow
Flow testing system and test method.
Invention content
It, can be accurately to refrigeration system it is an object of the invention to propose a kind of refrigeration system mass-flow measurement system
Mass flow tested, and the system structure is simple, easy to use.
It, can be simple and effective it is another object of the present invention to propose a kind of refrigeration system mass-flow measurement method
The mass flow to refrigeration system test.
For this purpose, the present invention uses following technical scheme：
A kind of refrigeration system mass-flow measurement system, including refrigeration system, wherein the evaporator of the refrigeration system with
The separated setting of throttling set, and the air entry of the evaporator is connected with refrigerant feeding mechanism, the exhaust of throttling set
Mouth is communicated with refrigerant collection device；It is provided with the first regulating valve between the evaporator and compressor of refrigeration system, and is pressing
The both ends setting of contracting machine is respectively arranged with first pressure detection device and second pressure detection device.
As a kind of preferred embodiment of above-mentioned refrigeration system mass-flow measurement system, the exhaust outlet of the evaporator, pressure
The air entry and exhaust ports of contracting machine are both provided with temperature-detecting device.
As a kind of preferred embodiment of above-mentioned refrigeration system mass-flow measurement system, temperature is provided on the evaporator
Regulating device.
As a kind of preferred embodiment of above-mentioned refrigeration system mass-flow measurement system, the refrigerant feeding mechanism includes storage
Gas tank, and be connected with the air accumulator and be used for the refrigerant tank that refrigerant expands, it is provided with second at the reservoir outlet
Regulating valve, the exhaust outlet of the refrigerant tank are connected with the air entry of the evaporator.
As a kind of preferred embodiment of above-mentioned refrigeration system mass-flow measurement system, the refrigerant collection device is refrigerant
Collecting tank, and the exit of the refrigerant collecting tank is provided with third regulating valve.
As a kind of preferred embodiment of above-mentioned refrigeration system mass-flow measurement system, the regulating valve is adjusted for electromagnetism
Valve.
A kind of test method of refrigeration system mass flow, it is suitable for refrigeration system quality stream as described above measurements
Test system comprising following steps：
Step A：The pressure for testing refrigeration system compressor air suction mouth and exhaust outlet under constant circumstance temperature first, as compression
The reference value of machine air entry and exhaust port pressure；
Step B：It opens refrigerant feeding mechanism and is filled with refrigerant into refrigeration system, while detecting the pressure at compressor air suction mouth
Power opens compressor, when detecting exhaust ports when detecting that the pressure of air entry is identical as compression force reference value at air entry
Pressure it is identical as exhaust ports compression force reference value when, open refrigerant collection device, start simultaneously at timing；
Step C：After t after a period of time, refrigerant collection device, the mass incremental M and time t of refrigerant collection device are closed
Ratio, the mass flow of refrigerant as in system.
A kind of preferred embodiment of test method as above-mentioned refrigeration system mass flow is supplied in refrigerant in stepb
Further include that vacuumize process is carried out to refrigeration system and refrigerant collection device before device starts gas supply.
A kind of preferred embodiment of test method as above-mentioned refrigeration system mass flow, refrigeration system evaporator and
It is provided with the first regulating valve between compressor, and in stepb, compressor inlet and exhaust are adjusted by the first regulating valve
Pressure at mouthful.
A kind of preferred embodiment of test method as above-mentioned refrigeration system mass flow is provided with temperature on the evaporator
Regulating device is spent, and temperature-detecting device is both provided in the exhaust outlet of evaporator, the air entry of compressor and exhaust ports,
And when refrigeration system is under temperature-constant operation state, detection evaporator discharge mouth, compressor air suction mouth and exhaust ports temperature,
And the temperature for detecting evaporator discharge mouth, compressor air suction mouth and exhaust ports is as temperature reference value；
During mass-flow measurement, adjusting temperature-adjusting device makes evaporator discharge mouth, compressor air suction mouth and row
Temperature temperature reference value corresponding with detecting at gas port is consistent.
Beneficial effects of the present invention are：The application is by the gas supply and refrigerant collection device of refrigerant feeding mechanism to refrigerant
It collects, while by the adjusting to air demand and gas collecting amount and the first regulating valve, test system may be implemented to normal
The simulation of the working condition of refrigeration system can be obtained by detecting the weight change amount of refrigerant collection device within a certain period of time
The mass flow of refrigeration system.By above structure and method, the application is realized using simple structure, accurately and effectively right
The mass flow of refrigeration system is tested.
Description of the drawings
Fig. 1 is the structural schematic diagram for the refrigeration system mass-flow measurement system that the specific embodiment of the invention provides.
Wherein：
1：Second regulating valve；2：First regulating valve；3：First pressure detection device；4：Second pressure detection device；5：The
Three regulating valves；6：Refrigerant collection device；7：Air accumulator；8：Refrigerant tank；9：Evaporator；10：Compressor；11：Throttling set；12：
Temperature-adjusting device.
Specific implementation mode
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, present embodiments provide for a kind of refrigeration system mass-flow measurement system, which includes
Refrigeration system, wherein the evaporator 9 of refrigeration system and the separated setting of throttling set 11, and the air entry of evaporator 9 connects
It is connected to refrigerant feeding mechanism, the exhaust outlet of throttling set 11 is communicated with refrigerant collection device 6.In 9 He of evaporator of refrigeration system
It is provided with the first regulating valve 2 between compressor 10, and first pressure detection is respectively arranged in the setting of the both ends of compressor 10
Device 3 and second pressure detection device 4.
In this application, the collection by the gas supply and refrigerant collection device 6 of refrigerant feeding mechanism to refrigerant, passes through simultaneously
Adjusting to air demand and gas collecting amount and the first regulating valve 2 can make 10 air entry of refrigeration system compressor and exhaust
(refrigeration system normal operating conditions refers to that evaporator and throttling fill to pressure at mouthful with refrigeration system system worked well state
Set normal connection, refrigeration system can complete normal refrigeration cycle) under corresponding position pressure it is identical, and then realize test
Simulation of the system to the working condition of normal refrigeration system.Become by detecting the weight of refrigerant collection device 6 within a certain period of time
Change amount can obtain the mass flow of refrigeration system.
The exhaust outlet of evaporator 9, the air entry of compressor 10 and exhaust ports are both provided with temperature-detecting device.And
Temperature-adjusting device 12 is provided on evaporator 9.Pass through the setting of temperature-detecting device and setting for temperature-adjusting device 12
It sets, during the mass-flow measurement of refrigeration system, it can be ensured that the temperature of refrigeration system and the temperature under its normal operating conditions
It spends identical, and then makes to simulate the refrigeration system working condition come with the working condition under refrigeration system normal operating conditions more
Matching, further improves the accuracy of refrigeration system mass-flow measurement as a result,.
Refrigerant feeding mechanism includes air accumulator 7, and is connected with air accumulator 7 and for the refrigerant tank 8 of refrigerant expansion, stores up
7 exit of gas tank is provided with the second regulating valve 1, and the exhaust outlet of refrigerant tank 8 is connected with the air entry of evaporator 9.
Refrigerant tank 8 is specifically act as：Refrigerant is evaporated gasification in refrigerant tank 8, and the refrigerant after gasification, which can enter, to be steamed
Device 9 is sent out, while second regulating valve 1 is set in the exit of air accumulator 8, by the way that system can be adjusted to the adjustment of the second regulating valve 1
The air inflow of cooling system, and then realize the control to compressor 10 air entry and exhaust ports pressure.
Refrigerant collection device 6 is refrigerant collecting tank, and the exit of the refrigerant collecting tank is provided with third regulating valve 5.?
Third regulating valve 5 is provided on refrigerant collecting tank, by the control to third regulating valve 5, can be to 10 air entry of compressor
While control with exhaust ports pressure, realization ensures to be in the receipts for being vented refrigeration system under steady state when system
Collection.
Preferably, regulating valve is solenoid valve.
In the present embodiment, a kind of test method of refrigeration system mass flow is additionally provided, it is suitable for above-mentioned systems
Cooling system mass-flow measurement system, specifically includes the following steps：
Step A：The pressure for testing refrigeration system compressor 10 air entry and exhaust outlet under constant circumstance temperature first, as pressure
The reference value of contracting machine 10 air entry and exhaust port pressure；
Step B：It opens refrigerant feeding mechanism and is filled with refrigerant into refrigeration system, while detecting at 10 air entry of compressor
Pressure opens compressor 10 when detecting that the pressure at air entry is identical as compression force reference value at air entry, is pressed when detecting
When the pressure of 10 exhaust ports of contracting machine is identical as exhaust ports compression force reference value, refrigerant collection device 6 is opened, meter is started simultaneously at
When；
Step C：After t after a period of time, close refrigerant collection device 6, the mass incremental M of refrigerant collection device 6 and when
Between t ratio, the mass flow of refrigerant as in system.
Preferably, further including to refrigeration system and refrigerant before refrigerant feeding mechanism starts gas supply in stepb
Collection device 6 carries out vacuumize process.
Preferably, the first regulating valve 2 is provided between the evaporator 9 and compressor 10 of refrigeration system, and
In step B, the pressure of compressor 10 air inlet and exhaust ports is adjusted by the first regulating valve 2.
Preferably, temperature-adjusting device is provided on evaporator 9, and exhaust outlet, compressor 10 in evaporator 9
Air entry and exhaust ports be both provided with temperature-detecting device, and when refrigeration system is under temperature-constant operation state, detection is steamed
Send out the temperature of device 9 exhaust outlet, compressor 10 air entry and exhaust ports, and by 9 exhaust outlet of evaporator, 10 air entry of compressor and
The temperature that exhaust ports detect is as temperature reference value；
During mass-flow measurement, adjusting temperature-adjusting device 12 makes 9 exhaust outlet of evaporator, 10 air entry of compressor
It is consistent with the temperature temperature reference value corresponding with detecting of exhaust ports.
The application simultaneously, additionally provides the specific course of work of above-mentioned test method comprising following steps：
Step A：The pressure of refrigeration system compressor 10 air entry and exhaust outlet under constant circumstance temperature, Yi Jizheng are tested first
Send out device 9 exit, compressor 10 air entry and exhaust ports temperature, as pressure, the reference value of temperature；
Step B：The evaporator 9 of refrigeration system and throttling set 11 are disconnected, the air entry and refrigerant of evaporator 9 are then made
Feeding mechanism is connected, and the exhaust outlet of throttling set 11 is connected with refrigerant collection device 6；
Step C：Before refrigerant feeding mechanism starts gas supply, closes the second regulating valve 1, opens the first regulating valve 2 and third
Regulating valve 5, to refrigeration system into and refrigerant collection device carry out vacuumize process, vacuumize finish after close all valves；
Step D：The second regulating valve 1 is opened, so that refrigerant is slowly entered refrigerant tank 8, refrigerant is made to expand, refrigerant is become by liquid
For gaseous state, subsequently into evaporator, start-up temperature regulating device 12 makes 9 gas outlet of evaporator (corresponding to the A points in attached drawing 1)
The temperature at place is consistent with temperature reference value, then opens the first regulating valve 2, so that refrigerant is entered compressor 10, while adjusting first
Regulating valve 2 and the second regulating valve 1, the pressure and temperature for making at 10 air entry of compressor and (corresponding to the points of the B in attached drawing 1) with surveyed
The pressure and temperature obtained is consistent with reference value；
Step E：Start compressor 10, while adjusting the first regulating valve 2, the second regulating valve 1 and temperature-adjusting device 12
To keep the state of B points, while the pressure at 10 exhaust outlet of compressor (corresponding to the C points in attached drawing 1), state of temperature are monitored,
When the pressure of C points, state of temperature are consistent with the pressure, temperature reference value measured, third regulating valve 5 is opened, is started simultaneously at
Timing in timing course, while adjusting the first regulating valve 2, the second regulating valve 1, third regulating valve 5 and temperature-adjusting device
12, temperature, the pressure to ensure 3 points of A, B, C are consistent with the temperature, compression force reference value detected；
Step F：After t after a period of time, close refrigerant collection device 6, the mass incremental M of refrigerant collection device 6 and when
Between t ratio, the mass flow of refrigerant as in system.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and it cannot be construed to limiting the scope of the invention in any way.Based on the explanation herein, the technology of this field
Personnel would not require any inventive effort the other specific implementation modes that can associate the present invention, these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. a kind of refrigeration system mass-flow measurement system, including refrigeration system, which is characterized in that the evaporation of the refrigeration system
The separated setting of device (9) and throttling set (11), and the air entry of the evaporator (9) is connected with refrigerant feeding mechanism,
The exhaust outlet of throttling set (11) is communicated with refrigerant collection device (6)；Refrigeration system evaporator (9) and compressor (10) it
Between be provided with the first regulating valve (2), and setting is respectively arranged with first pressure detection device (3) at the both ends of compressor (10)
With second pressure detection device (4).
2. refrigeration system mass-flow measurement system according to claim 1, which is characterized in that the evaporator (9)
Exhaust outlet, the air entry of compressor (10) and exhaust ports are both provided with temperature-detecting device.
3. refrigeration system mass-flow measurement system according to claim 2, which is characterized in that on the evaporator (9)
It is provided with temperature-adjusting device (12).
4. refrigeration system mass-flow measurement system according to claim 1, which is characterized in that the refrigerant feeding mechanism
Including air accumulator (7), and it is connected with the air accumulator (7) and is used for the refrigerant tank (8) that refrigerant expands, the air accumulator
(7) exit is provided with the second regulating valve (1), and the exhaust outlet of the refrigerant tank (8) is connected with the air entry of the evaporator (9)
It is logical.
5. refrigeration system mass-flow measurement system according to claim 4, which is characterized in that the refrigerant collection device
(6) it is refrigerant collecting tank, and the exit of the refrigerant collecting tank is provided with third regulating valve (5).
6. refrigeration system mass-flow measurement system according to claim 5, which is characterized in that first regulating valve
(2), second regulating valve (1) and the third regulating valve (5) are solenoid valve.
7. a kind of test method of refrigeration system mass flow, it is suitable for refrigeration as claimed in any one of claims 1 to 6
Mass of system flow testing system, which is characterized in that include the following steps：
Step A：The pressure for testing refrigeration system compressor (10) air entry and exhaust outlet under constant circumstance temperature first, as compression
The reference value of machine (10) air entry and exhaust port pressure；
Step B：It opens refrigerant feeding mechanism and is filled with refrigerant into refrigeration system, while detecting the pressure at compressor (10) air entry
Power opens compressor (10) when detecting that the pressure of air entry is identical as compression force reference value at air entry, is vented when detecting
When pressure at mouthful is identical as exhaust ports compression force reference value, refrigerant collection device (6) is opened, timing is started simultaneously at；
Step C：After t after a period of time, close refrigerant collection device (6), the mass incremental M of refrigerant collection device (6) and when
Between t ratio, the mass flow of refrigerant as in refrigeration system.
8. the test method of refrigeration system mass flow according to claim 7, which is characterized in that in stepb, cold
Further include that vacuumize process is carried out to refrigeration system and refrigerant collection device (6) before matchmaker's feeding mechanism starts gas supply.
9. the test method of refrigeration system mass flow according to claim 7, which is characterized in that in the steaming of refrigeration system
It is provided with the first regulating valve (2) between hair device (9) and compressor (10), and in stepb, is adjusted by the first regulating valve (2)
The pressure of whole compressor (10) air inlet and exhaust ports.
10. the test method of refrigeration system mass flow according to claim 7, which is characterized in that the evaporator (9)
On be provided with temperature-adjusting device (12), and in the exhaust outlets of evaporator (9), the air entry and exhaust ports of compressor (10)
It is both provided with temperature-detecting device, and when refrigeration system is under temperature-constant operation state, detection evaporator (9) exhaust outlet, compression
The temperature of machine (10) air entry and exhaust ports, and evaporator (9) exhaust outlet, compressor (10) air entry and exhaust ports are examined
The temperature measured is as temperature reference value；
During mass-flow measurement, adjusting temperature-adjusting device (12) makes evaporator (9) exhaust outlet, compressor (10) air-breathing
The temperature temperature reference value corresponding with detecting of mouth and exhaust ports is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316242.6A CN104913823B (en) | 2015-06-09 | 2015-06-09 | A kind of refrigeration system mass-flow measurement system and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316242.6A CN104913823B (en) | 2015-06-09 | 2015-06-09 | A kind of refrigeration system mass-flow measurement system and test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104913823A CN104913823A (en) | 2015-09-16 |
| CN104913823B true CN104913823B (en) | 2018-11-06 |
Family
ID=54083084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510316242.6A Active CN104913823B (en) | 2015-06-09 | 2015-06-09 | A kind of refrigeration system mass-flow measurement system and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104913823B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417075A (en) * | 1994-03-07 | 1995-05-23 | Spx Corporation | Refrigerant filtation system with filter change indication |
| CN1677065A (en) * | 2004-03-31 | 2005-10-05 | 高砂热学工业株式会社 | Metering method and flow metering device |
| CN201387379Y (en) * | 2009-04-01 | 2010-01-20 | 顺德职业技术学院 | Test device for refrigerant mass flow characteristics of throttling mechanism |
| CN102538886A (en) * | 2012-01-07 | 2012-07-04 | 蔡茂林 | Extra-pipe binding type thermal pulse gas flowmeter capable of resisting ambient temperature disturbances |
-
2015
- 2015-06-09 CN CN201510316242.6A patent/CN104913823B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417075A (en) * | 1994-03-07 | 1995-05-23 | Spx Corporation | Refrigerant filtation system with filter change indication |
| CN1677065A (en) * | 2004-03-31 | 2005-10-05 | 高砂热学工业株式会社 | Metering method and flow metering device |
| CN201387379Y (en) * | 2009-04-01 | 2010-01-20 | 顺德职业技术学院 | Test device for refrigerant mass flow characteristics of throttling mechanism |
| CN102538886A (en) * | 2012-01-07 | 2012-07-04 | 蔡茂林 | Extra-pipe binding type thermal pulse gas flowmeter capable of resisting ambient temperature disturbances |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104913823A (en) | 2015-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106839340A (en) | A kind of air conditioner refrigerating measuring method, device and air-conditioner | |
| CN101446524B (en) | Heat exchanger performance testing device for air conditioning | |
| CN101520376B (en) | Testing device for detecting and controlling lubricating oil circulation rate of refrigerating system | |
| CN105424150B (en) | Refrigerant quality testing device and testing method | |
| CN107013450B (en) | A kind of energy-saving compressor method for testing performance and device | |
| CN105181313A (en) | Performance contrast experiment table of thermal expansion valves | |
| CN116241430B (en) | Water working medium compressor test system based on thermal self-balance and working method thereof | |
| CN106121993A (en) | CO2refrigeration compressor and the performance testing device of complete unit thereof | |
| CN106151002B (en) | A kind of multi-evaporation temperature system compressors performance testing device | |
| CN104913823B (en) | A kind of refrigeration system mass-flow measurement system and test method | |
| CN105865661A (en) | Positive displacement increasing enthalpy compressor refrigerating capacity testing device and method | |
| US12281826B2 (en) | Method for monitoring a refrigerant charge in a vapour compression system | |
| CN114658644A (en) | Two-stage compression two-stage throttling volumetric refrigerant compressor performance test system and test method | |
| CN108953204A (en) | Pipeline compressor performance test method and system | |
| Jin et al. | Refrigerant and lubricant distribution in MAC system | |
| CN110082094A (en) | The shunting performance testing experimental system not influenced by the non-homogeneous heat exchange in downstream | |
| CN105805010A (en) | Rotary compressor leakage character testing system based on phase trigger stroboscopic method | |
| Kim et al. | Evaluation of virtual refrigerant mass flow sensors | |
| CN207018184U (en) | A kind of energy-saving compressor device for detecting performance | |
| CN205445993U (en) | Compressor test bench | |
| CN205049328U (en) | Thermostatic expansion valve performance contrast laboratory bench | |
| CN109781445A (en) | A method for determining the flow area of thermal expansion valve | |
| CN106918451B (en) | System for testing oil-gas separation efficiency and test method thereof | |
| CN209802646U (en) | Experimental system for split flow performance testing not affected by downstream non-uniform heat transfer | |
| CN205228604U (en) | Refrigerant quality testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |