Cooling capacity metering system based on different users

Abstract

The utility model discloses a cooling capacity metering system based on different users, which comprises a liquid-phase refrigerant inlet end, a gas-phase refrigerant outlet end and a plurality of metering mechanisms connected in parallel, the metering mechanisms connected in parallel are respectively connected into the liquid-phase refrigerant inlet end and the gas-phase refrigerant outlet end, and each metering mechanism is provided with a flowmeter, a thermal control mechanism and an adjusting mechanism. The flow meter and the thermal control mechanism are connected into the user side inlet, the adjusting mechanism is connected with the user side outlet, and the thermal control mechanism comprises a circulating barrel and a heat exchanger which are connected. The flow meter, the flow regulating valve, the circulating barrel and the heat exchanger are arranged at different user sides, the circulating barrel is placed above the heat exchanger, so that a refrigerant enters a shell pass of the heat exchanger under the action of gravity, the refrigerant in the heat exchanger is in a continuous full-liquid state, and the refrigerant is in a saturated state after being gasified by controlling the pressure of the circulating barrel through the valve; and the temperature is the saturation temperature under the set pressure, and accurate measurement and calculation of the cooling capacity of different cold energy users can be achieved through unified calculation and logic control.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling capacity metering, in particular to a cooling capacity metering system based on different users. Background Art

[0002] With the development of my country's cold chain logistics and related refrigeration industries, the clustering of different users into cold industry parks is becoming a key future development direction. The concentration of cold-using enterprises facilitates unified energy supply within the park, improves energy utilization, and enables energy scheduling to balance peak and valley fluctuations among cold-using enterprises. It also facilitates trade integration among enterprises within the park and fosters internal circulation. However, the precise and convenient measurement of cold energy during the cold energy supply process, as well as ensuring that users are comfortable with the metering method, are key considerations.

[0003] Existing technologies mainly measure the user-side temperature, humidity, flow rate, enthalpy value, etc. to calculate the user's cooling capacity, which requires a relatively complex calculation system or database. For example, Chinese patent CN101629857B discloses a fan coil air conditioning cooling / heat metering system and cooling / heat metering method, which measures the inlet and outlet temperature, humidity, flow rate, enthalpy value and looks up the data table to achieve cooling capacity measurement, and the metering method is complex; Chinese patent CN101644588B provides a real-time monitoring of the cooling load and cooling capacity metering method and system for air-conditioning terminal equipment, which measures the air temperature and sensible heat and latent heat ratio, and then calculates the cooling capacity by flow rate. The sensible heat and latent heat ratio needs to be calculated for different business formats and different temperatures, and the calculation amount is huge for multiple business formats. , and the measurement parameters are not unified; Chinese patent CN104298888 discloses a fan coil cooling metering method based on a flow-cooling capacity relationship model. The heat exchange coefficient of the inner and outer surfaces of the fan coil is determined by the fan coil structure, air supply volume, and water supply flow. The dew point temperature of the fan coil machine is set according to the water supply temperature, and the inlet and outlet humidity is measured to calculate the cooling capacity. Too many measured values ​​are required and re-measurement and calculation are required for different users; Chinese patent CN102279067B proposes a method and device for measuring the cooling and heat capacity of the fan coil terminal in a centralized air-conditioning system. The cooling capacity of the fan coil under actual working conditions is obtained by detecting the wind speed state, the inlet water temperature, and the inlet air temperature and humidity of the fan coil. It is not applicable to non-fan users. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a cooling capacity metering system based on different users to solve the problems raised by the above-mentioned background technology.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a cooling capacity metering system based on different users, including a liquid refrigerant inlet end, a gaseous refrigerant outlet end and a plurality of parallel metering mechanisms, the parallel metering mechanisms are respectively connected to the liquid refrigerant inlet end and the gaseous refrigerant outlet end, the metering mechanism is provided with a flow meter, a thermal control mechanism and an adjusting mechanism, the flow meter is connected to the thermal control mechanism and is connected to the user end inlet, the adjusting mechanism is connected to the user end outlet, the thermal control mechanism includes a circulation barrel and a heat exchanger, and the circulation barrel is connected to the heat exchanger.

[0006] As a further improvement of the present invention: a high temperature branch, a low temperature branch and an ultra-low temperature branch, wherein the high temperature branch, the low temperature branch and the ultra-low temperature branch are respectively connected in parallel to the liquid phase refrigerant inlet end and the gas phase refrigerant outlet end.

[0007] As a further improvement of the present invention: the high-temperature branch is provided with a first flow meter, a high-temperature heat exchanger, a temperature transmitter and a fourth flow regulating valve. The first flow meter is connected to the high-temperature heat exchanger and connected to the high-temperature user inlet end. The fourth flow regulating valve is connected to the high-temperature heat exchanger. The fourth flow regulating valve is also connected to the high-temperature user outlet end. The temperature transmitter is connected to the high-temperature user outlet end and connected to the fourth flow regulating valve.

[0008] As a further improvement of the present invention: the low-temperature branch is provided with a second flow meter and a low-temperature heat exchanger, and the second flow meter is connected to the low-temperature heat exchanger and accessed to the low-temperature user inlet end.

[0009] As a further improvement of the present invention: the ultra-low temperature branch is provided with a third flow meter, an ultra-low temperature heat exchanger, a throttling expansion valve and a compressor; the third flow meter is connected to the ultra-low temperature heat exchanger; the ultra-low temperature heat exchanger is connected to the throttling expansion valve and connected to the ultra-low temperature user inlet; the compressor is also connected to the ultra-low temperature heat exchanger and connected to the ultra-low temperature user outlet.

[0010] As a further improvement of the present invention: the high-temperature branch is further provided with a first circulation barrel, the first circulation barrel is connected to the high-temperature heat exchanger, and the first circulation barrel is also connected to the gas-phase refrigerant outlet end.

[0011] As a further improvement of the present invention: the low-temperature branch is further provided with a second circulation barrel, the second circulation barrel is connected to the low-temperature heat exchanger, and the second circulation barrel is also connected to the gas-phase refrigerant outlet end.

[0012] As a further improvement of the present invention: the ultra-low temperature branch is further provided with a third circulation barrel, the third circulation barrel is connected to the ultra-low temperature heat exchanger, and the third circulation barrel is also connected to the gas phase refrigerant outlet end.

[0013] As a further improvement of the present invention: the high-temperature branch is further provided with a first flow regulating valve, a first pressure regulating valve and a first liquid level transmitter, the first flow regulating valve is connected between the first flow meter and the first circulation barrel, the first liquid level transmitter is connected to the first circulation barrel and connected to the first flow regulating valve, and the first pressure regulating valve is connected to the first circulation barrel and connected to the gas-phase refrigerant outlet;

[0014] The low-temperature branch is further provided with a second flow regulating valve, a second pressure regulating valve and a second liquid level transmitter. The second flow regulating valve is connected between the second flow meter and the second circulation barrel. The second liquid level transmitter is connected to the second circulation barrel and connected to the second flow regulating valve. The second pressure regulating valve is connected to the second circulation barrel and connected to the gas-phase refrigerant outlet.

[0015] The ultra-low temperature branch is also provided with a third flow regulating valve, a third pressure regulating valve and a third liquid level transmitter. The third flow regulating valve is connected between the third flow meter and the third circulation barrel. The third liquid level transmitter is connected to the third circulation barrel and connected to the third flow regulating valve. The third pressure regulating valve is connected to the third circulation barrel and connected to the gas phase refrigerant outlet end.

[0016] As a further improvement of the present invention: the high-temperature branch is further provided with a first pressure transmitter, and the first pressure transmitter is connected to the first circulation barrel;

[0017] The low-temperature branch is further provided with a second pressure transmitter, and the second pressure transmitter is connected to the second circulation barrel;

[0018] The ultra-low temperature branch is further provided with a third pressure transmitter, and the third pressure transmitter is connected to the third circulation barrel.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The utility model sets flow meters, flow regulating valves, circulation barrels, and heat exchangers at different user ends. The circulation barrels are placed above the heat exchanger so that the refrigerant enters the shell side of the heat exchanger under the action of gravity. The refrigerant in the heat exchanger is in a continuous liquid-filled state. The pressure of the circulation barrels is controlled by the valve so that the refrigerant is in a saturated state after vaporization, and the temperature is at the saturation temperature under the set pressure. The calculation and control logic can be unified to realize the accurate measurement of the cooling capacity used by different cooling energy users.

[0021] 2. The utility model is simple to measure. Since the inlet and outlet temperatures and outlet pressures are consistent, it is only necessary to calculate the cooling capacity of the inlet and outlet refrigerants. Then, the flow rate of the refrigerant for different users can be measured by a flow meter to achieve accurate measurement of the cooling capacity.

[0022] 3. The utility model has a wide applicability. For users with different temperatures, the same refrigerant inlet and outlet parameters and the same set of equipment can be used to measure the cooling capacity, covering users from ultra-low temperature to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the present utility model.

[0024] Numbers in the figure: 1. First flow meter, 2. First flow regulating valve, 3. First circulation barrel, 4. First pressure transmitter, 5. First pressure regulating valve, 6. First liquid level transmitter, 7. High-temperature heat exchanger, 8. Fourth flow regulating valve, 9. Temperature transmitter, 10. High-temperature user, 11. Second flow meter, 12. Second flow regulating valve, 13. Second circulation barrel, 14. Second pressure transmitter, 15. Second pressure regulating valve, 16. Second liquid level transmitter, 17. Low-temperature heat exchanger, 18. Low-temperature user, 19. Third flow meter, 20. Third flow regulating valve, 21. Third circulation barrel, 22. Third pressure transmitter, 23. Third pressure regulating valve, 24. Third liquid level transmitter, 25. Ultra-low-temperature heat exchanger, 26. Throttling expansion valve, 27. Compressor, 28. Ultra-low-temperature user. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0026] The present invention is now further described in conjunction with the accompanying drawings and embodiments: a cooling capacity metering system based on different users, comprising a liquid refrigerant inlet, a gas refrigerant outlet and a plurality of parallel metering mechanisms, the parallel metering mechanisms being respectively connected to the liquid refrigerant inlet and the gas refrigerant outlet, the metering mechanisms being provided with a flow meter, a thermal control mechanism and an adjusting mechanism, the flow meter being connected to the thermal control mechanism and being connected to the user-end inlet, the adjusting mechanism being connected to the user-end outlet, the thermal control mechanism comprising a circulation barrel and a heat exchanger, the circulation barrel being connected to the heat exchanger.

[0027] The utility model sets flow meters, flow regulating valves, circulation barrels and heat exchangers at different user ends. The circulation barrel is placed above the heat exchanger so that the refrigerant enters the shell side of the heat exchanger under the action of gravity. The refrigerant in the heat exchanger is in a continuous full liquid state. The pressure of the circulation barrel is controlled by the valve so that the refrigerant is in a saturated state after gasification, and the temperature is at the saturation temperature under the set pressure. The calculation and control logic can be unified to realize the accurate measurement of the cooling capacity used by different cooling energy users.

[0028] In one embodiment of the present invention, the high temperature branch, the low temperature branch and the ultra-low temperature branch are respectively connected in parallel to the liquid phase refrigerant inlet and the gas phase refrigerant outlet.

[0029] In one embodiment of the present utility model, the high-temperature branch is provided with a first flow meter 1, a high-temperature heat exchanger 7, a temperature transmitter 9 and a fourth flow regulating valve 8. The first flow meter 1 is connected to the high-temperature heat exchanger 7 and connected to the inlet end of the high-temperature user 10. The fourth flow regulating valve 8 is connected to the high-temperature heat exchanger 7. The fourth flow regulating valve 8 is also connected to the outlet end of the high-temperature user 10. The temperature transmitter 9 is connected to the outlet end of the high-temperature user 10 and connected to the fourth flow regulating valve 8.

[0030] In one embodiment of the present invention, the low-temperature branch is provided with a second flow meter 11 and a low-temperature heat exchanger 17 , and the second flow meter 11 is connected to the low-temperature heat exchanger 17 and accessed to the inlet of the low-temperature user end 18 .

[0031] In one embodiment of the present utility model, the ultra-low temperature branch is provided with a third flow meter 19, an ultra-low temperature heat exchanger 2517, a throttling expansion valve 26 and a compressor 27. The third flow meter 19 is connected to the ultra-low temperature heat exchanger 2517. The ultra-low temperature heat exchanger 2517 is connected to the throttling expansion valve 26 and connected to the inlet end of the ultra-low temperature user end 28. The compressor 27 is also connected to the ultra-low temperature heat exchanger 2517 and connected to the outlet end of the ultra-low temperature user 28.

[0032] In one embodiment of the present invention, the high-temperature branch is further provided with a first circulation barrel 3 , which is connected to the high-temperature heat exchanger 7 , and is also connected to the gas-phase refrigerant outlet.

[0033] In one embodiment of the present invention, the low-temperature branch is further provided with a second circulation barrel 13 , which is connected to the low-temperature heat exchanger 17 , and is also connected to the gas-phase refrigerant outlet.

[0034] In one embodiment of the present invention, the ultra-low temperature branch is further provided with a third circulation barrel 21, the third circulation barrel 21 is connected to the ultra-low temperature heat exchanger 2517, and the third circulation barrel 21 is also connected to the gas phase refrigerant outlet.

[0035] In one embodiment of the present utility model, the high-temperature branch is further provided with a first flow regulating valve 2, a first pressure regulating valve 5 and a first liquid level transmitter 6. The first flow regulating valve 2 is connected between the first flow meter 1 and the first circulation barrel 3. The first liquid level transmitter 6 is connected to the first circulation barrel 3 and connected to the first flow regulating valve 2. The first pressure regulating valve 5 is connected to the first circulation barrel 3 and connected to the gas-phase refrigerant outlet.

[0036] The low-temperature branch is further provided with a second flow regulating valve 12, a second pressure regulating valve 15 and a second liquid level transmitter 16. The second flow regulating valve 12 is connected between the second flow meter 11 and the second circulation barrel 13. The second liquid level transmitter 16 is connected to the second circulation barrel 13 and connected to the second flow regulating valve 12. The second pressure regulating valve 15 is connected to the second circulation barrel 13 and connected to the gas-phase refrigerant outlet.

[0037] The ultra-low temperature branch is also provided with a third flow regulating valve 20, a third pressure regulating valve 23 and a third liquid level transmitter 24. The third flow regulating valve 20 is connected between the third flow meter 19 and the third circulation barrel 21. The third liquid level transmitter 24 is connected to the third circulation barrel 21 to access the third flow regulating valve 20. The third pressure regulating valve 23 is connected to the third circulation barrel 21 to access the gas-phase refrigerant outlet end.

[0038] In one embodiment of the present utility model, the high-temperature branch is further provided with a first pressure transmitter 4 , and the first pressure transmitter 4 is connected to the first circulation barrel 3 ;

[0039] The low-temperature branch is further provided with a second pressure transmitter 14 , and the second pressure transmitter 14 is connected to the second circulation barrel 13 ;

[0040] The ultra-low temperature branch is further provided with a third pressure transmitter 22 , and the third pressure transmitter 22 is connected to the third circulation barrel 21 .

[0041] According to the cold metering system based on different users of the present application, the present application can divide the system into a metering system and a user system. The metering system is divided into three routes. The first route includes a first flow meter 1, a first flow regulating valve 2, a first circulation barrel 3 and a first pressure regulating valve 5 connected in sequence, and the first circulation barrel 3 is provided with a first pressure transmitter 4 and a first liquid level transmitter 6; the second route includes a second flow meter 11, a second flow regulating valve 12, a second circulation barrel 13 and a second pressure regulating valve 15 connected in sequence, and the second circulation barrel 13 is provided with a second pressure transmitter 14 and a second liquid level transmitter 16; the third route includes a third flow meter 19, a third flow regulating valve 20 connected in sequence, , a third circulation barrel 21 and a third pressure regulating valve 23, and the third circulation barrel 21 is provided with a third pressure transmitter 22 and a third liquid level transmitter 24; the user system includes a high-temperature user 10 system, a low-temperature user 18 system, and an ultra-low-temperature user 28 system, the high-temperature user 10 system includes a high-temperature heat exchanger 7, a high-temperature user 10, a temperature transmitter 9, and a fourth flow regulating valve 8 connected in sequence, wherein the flow regulating valve is connected to the high-temperature heat exchanger 7; the low-temperature user 18 system includes a low-temperature heat exchanger 17 and a low-temperature user 18 connected in sequence; the ultra-low-temperature user 28 system includes an ultra-low-temperature heat exchanger 2517, a throttling expansion valve 26, an ultra-low-temperature user 28, and a compressor 27 connected in sequence.

[0042] In one embodiment, the low-temperature heat exchanger 17 can be eliminated according to actual conditions, and the liquid refrigerant can be directly connected to the low-temperature user 18.

[0043] The first liquid level transmitter 6 is interlocked with the opening of the first flow control valve 2, the second liquid level transmitter 16 is interlocked with the opening of the second flow control valve 12, and the third liquid level transmitter 24 is interlocked with the opening of the third flow control valve 20; the temperature transmitter 9 is interlocked with the fourth flow control valve 8;

[0044] The first pressure transmitter 4, the second pressure transmitter 14, and the third pressure transmitter 22 are used to monitor the pressures in the first circulation barrel 3, the second circulation barrel 13, and the third circulation barrel 21, respectively, and give an alarm when they deviate from the set values;

[0045] The first circulation barrel 3 is placed above the high-temperature heat exchanger 7, the second circulation barrel 13 is placed above the low-temperature heat exchanger 17, and the third circulation barrel 21 is placed above the ultra-low-temperature heat exchanger 2517;

[0046] The liquid refrigerant is divided into three paths. The first path passes through the first circulation barrel 3 and enters the shell side of the high-temperature heat exchanger 7 under the action of gravity. It exchanges heat with the high-temperature user 10 refrigerant from the high-temperature user 10 and heats up and vaporizes before returning to the first circulation barrel 3. Then, it passes through the first pressure regulating valve 5 and enters the downstream. The high-temperature user 10 refrigerant cools down and liquefies before entering the high-temperature user 10. The second path passes through the second circulation barrel 13 and enters the shell side of the low-temperature heat exchanger 17 under the action of gravity. It exchanges heat with the low-temperature user 18 refrigerant from the low-temperature user 18 and heats up and vaporizes before returning to the second circulation barrel 13. After that, it enters the downstream through the second pressure regulating valve 15, and the refrigerant of the low-temperature user 18 is cooled and liquefied before entering the low-temperature user 18; the third circulation barrel 21 enters the shell side of the ultra-low temperature heat exchanger 2517 under the action of gravity, exchanges heat with the ultra-low temperature user 28 refrigerant from the compressor 27, and then returns to the third circulation barrel 21, and then enters the downstream through the third pressure regulating valve 23, and the refrigerant of the ultra-low temperature user 28 is cooled and liquefied, and then throttled and expanded by the throttling expansion valve 26, and then enters the ultra-low temperature user 28 to release cold energy and vaporize before entering the compressor 27.

[0047] The shell sides of the high-temperature heat exchanger 7, the low-temperature heat exchanger 17 and the ultra-low-temperature heat exchanger 2517 are all in a full liquid state, and the liquid refrigerant is in a saturated state after vaporization, and is respectively restricted by the first pressure regulating valve 5, the second pressure regulating valve 15 and the third pressure regulating valve 23. The outlet gas-phase refrigerant temperature is at the saturation temperature under the set pressure.

[0048] In some embodiments of the present invention, the outlet pressures of the first pressure regulating valve 5, the second pressure regulating valve 15, and the third pressure regulating valve 23 are set to a unified parameter, which can ensure that the temperature and pressure of the gas-phase refrigerant at the three outlets are consistent. At the same time, since the inlet temperature of the liquid-phase refrigerant is consistent, the difference in the cooling capacity released by the unit flow of the three refrigerants is ≤0.2%;

[0049] In some embodiments of the present invention, the first flow meter 1, the second flow meter 11 and the third flow meter 19 are used to measure the flow of three refrigerants to obtain the flow Qx of each line, and the cooling capacity Wq released by the refrigerant inlet and outlet per unit flow is calculated, and the cooling capacity W released by each refrigerant line is W = Qx*Wq.

[0050] In summary, after reading the document of this utility model, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of this utility model without creative mental work, which all fall within the scope of protection of this utility model.

Claims

1. A cooling capacity metering system based on different users, characterized in that: It includes a liquid refrigerant inlet, a gaseous refrigerant outlet and multiple parallel metering mechanisms, the parallel metering mechanisms are respectively connected to the liquid refrigerant inlet and the gaseous refrigerant outlet, the metering mechanisms are provided with a flow meter, a thermal control mechanism and an adjustment mechanism, the flow meter and the thermal control mechanism are connected to the user end inlet, the adjustment mechanism is connected to the user end outlet, the thermal control mechanism includes a circulation barrel and a heat exchanger, and the circulation barrel is connected to the heat exchanger.

2. The cooling capacity metering system based on different users according to claim 1 is characterized in that: A high-temperature branch, a low-temperature branch and an ultra-low-temperature branch are respectively connected in parallel to the liquid-phase refrigerant inlet and the gas-phase refrigerant outlet.

3. The cooling capacity metering system based on different users according to claim 2, characterized in that: The high-temperature branch is provided with a first flow meter, a high-temperature heat exchanger, a temperature transmitter and a fourth flow regulating valve. The first flow meter is connected to the high-temperature heat exchanger and connected to the high-temperature user inlet end. The fourth flow regulating valve is connected to the high-temperature heat exchanger. The fourth flow regulating valve is also connected to the high-temperature user outlet end. The temperature transmitter is connected to the high-temperature user outlet end and connected to the fourth flow regulating valve.

4. The cooling capacity metering system based on different users according to claim 3 is characterized in that: The low-temperature branch is provided with a second flow meter and a low-temperature heat exchanger, and the second flow meter is connected to the low-temperature heat exchanger and accessed to the low-temperature user inlet end.

5. The cooling capacity metering system based on different users according to claim 4 is characterized in that: The ultra-low temperature branch is provided with a third flow meter, an ultra-low temperature heat exchanger, a throttling expansion valve and a compressor. The third flow meter is connected to the ultra-low temperature heat exchanger, the ultra-low temperature heat exchanger is connected to the throttling expansion valve and connected to the ultra-low temperature user inlet end, and the compressor is also connected to the ultra-low temperature heat exchanger and connected to the ultra-low temperature user outlet end.

6. The cooling capacity metering system based on different users according to claim 5, characterized in that: The high-temperature branch is further provided with a first circulation barrel, which is connected to the high-temperature heat exchanger and is also connected to the gas-phase refrigerant outlet.

7. The cooling capacity metering system based on different users according to claim 6, characterized in that: The low-temperature branch is further provided with a second circulation barrel, the second circulation barrel is connected to the low-temperature heat exchanger, and the second circulation barrel is also connected to the gas-phase refrigerant outlet.

8. The cooling capacity metering system based on different users according to claim 7, characterized in that: The ultra-low temperature branch is further provided with a third circulation barrel, the third circulation barrel is connected to the ultra-low temperature heat exchanger, and the third circulation barrel is also connected to the gas phase refrigerant outlet end.

9. The cooling capacity metering system based on different users according to claim 8, characterized in that: The high-temperature branch is further provided with a first flow regulating valve, a first pressure regulating valve and a first liquid level transmitter. The first flow regulating valve is connected between the first flow meter and the first circulation barrel. The first liquid level transmitter is connected to the first circulation barrel and connected to the first flow regulating valve. The first pressure regulating valve is connected to the first circulation barrel and connected to the gas-phase refrigerant outlet. The low-temperature branch is further provided with a second flow regulating valve, a second pressure regulating valve and a second liquid level transmitter. The second flow regulating valve is connected between the second flow meter and the second circulation barrel. The second liquid level transmitter is connected to the second circulation barrel and connected to the second flow regulating valve. The second pressure regulating valve is connected to the second circulation barrel and connected to the gas-phase refrigerant outlet. The ultra-low temperature branch is also provided with a third flow regulating valve, a third pressure regulating valve and a third liquid level transmitter. The third flow regulating valve is connected between the third flow meter and the third circulation barrel. The third liquid level transmitter is connected to the third circulation barrel and connected to the third flow regulating valve. The third pressure regulating valve is connected to the third circulation barrel and connected to the gas phase refrigerant outlet end.

10. The cooling capacity metering system based on different users according to claim 9, characterized in that: The high-temperature branch is further provided with a first pressure transmitter, and the first pressure transmitter is connected to the first circulation barrel; The low-temperature branch is further provided with a second pressure transmitter, and the second pressure transmitter is connected to the second circulation barrel; The ultra-low temperature branch is further provided with a third pressure transmitter, and the third pressure transmitter is connected to the third circulation barrel.

Images