A heat exchanger performance testing system with convenient flow, temperature, and pressure regulation.

Abstract

This invention discloses a heat exchanger performance testing system with convenient flow, temperature, and pressure adjustment, comprising a refrigerant supply system, a hot water circulation system, and a cold water circulation system. The refrigerant supply system and the hot water circulation system are coupled through the tested condenser and an auxiliary condenser; the refrigerant supply system and the cold water circulation system are coupled through an expansion valve and an auxiliary evaporator; and the hot water circulation system and the cold water circulation system are coupled through the tested heat exchanger. This system can not only adjust the inlet flow rate but also the refrigerant inlet pressure, water outlet pressure, inlet temperature, and water inlet temperature of the evaporator and condenser, making it highly adaptable.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of refrigeration technology, and particularly relates to a heat exchanger performance testing system with convenient flow, temperature and pressure regulation. BACKGROUND

[0002] With the development of air conditioning industry, traditional one-to-one type household air conditioners will be replaced by multi-connected air conditioners and central air conditioning systems with higher integration and better energy saving benefits. Evaporators and condensers are two important heat exchangers of air conditioning refrigeration systems, and the performance of the two directly affects the performance of the entire refrigeration system. However, since the air conditioning evaporator and condenser have small heat exchange capacity and small refrigerant flow, it is difficult to test their performance. The thermal performance test bench on the market can only adjust the flow of the measured water-water heat exchanger, condenser and evaporator, and cannot adjust the inlet pressure and temperature of the measured water-water heat exchanger, condenser and evaporator. The market equipment has poor openness and cannot do water-water heat exchanger, condenser and evaporator performance test experiments on the same equipment. More specifically, the shortcomings of the existing thermal performance test bench are concentrated in the following three points:

[0003] (1) The current thermal performance test bench can only adjust the inlet flow, and cannot adjust the fluorine road inlet pressure and water road inlet pressure of the evaporator and condenser.

[0004] (2) The current thermal performance test bench can only adjust the inlet flow, and cannot adjust the fluorine road inlet temperature and water road inlet temperature of the evaporator and condenser.

[0005] (3) The water-water heat exchanger, condenser and evaporator heat exchange experimental test platform on the market has poor openness, can only do single experiment, has limited applicability, and cannot be used for water-water heat exchanger, condenser and evaporator experiments. SUMMARY

[0006] In order to solve the problems in the prior art, the present application provides a heat exchanger performance testing system with convenient flow, temperature and pressure regulation, which can adjust the inlet flow, pressure and temperature of the measured water-water heat exchanger, condenser and evaporator to improve the testing accuracy and perform performance test experiments under various working conditions.

[0007] The technical solutions adopted by the present application are as follows:

[0008] A heat exchanger performance testing system with convenient flow, temperature and pressure regulation, comprising a refrigerant supply system, a hot water circulation system and a cold water circulation system.

[0009] The refrigerant supply system comprises a variable frequency compressor, an oil separator, a dry cooler, an auxiliary condenser, a supercooler, an expansion valve, an auxiliary evaporator, and is sequentially connected to form a circuit according to the flow direction of the refrigerant; the refrigerant recovery machine and the vacuum pump are respectively connected to the dry cooler and the variable frequency compressor; the measured condenser is connected in parallel with the auxiliary condenser; the measured evaporator is connected in parallel with the auxiliary evaporator;

[0010] The hot water circulating system comprises a hot water tank, a filter, a first variable frequency water pump, an auxiliary condenser, a dry cooler, a second flow meter, and a measured heat exchanger, and is sequentially connected to form a circuit; the hot water tank is also connected in parallel with a water tank fan and a water tank electric heater;

[0011] The cold water circulating system comprises a cold water tank, a filter, a water tank electric heater, a fourth variable frequency water pump, an auxiliary evaporator, an electric heater, a third flow meter, and a measured heat exchanger, and is sequentially connected to form a circuit; the second variable frequency water pump, the cooling water tower, and the cold water tank are connected in series to form a circuit; the cold water tank, the third variable frequency water pump, the filter, and the supercooler are sequentially connected in series to form a circuit.

[0012] Further, the variable frequency compressor and the oil separator are connected in series with the oil storage barrel to form a circuit.

[0013] Further, both ends of the measured condenser are connected in parallel with the auxiliary condenser through a three-way valve, the refrigerant inlet flow of the measured condenser is adjusted through the three-way valve at the condenser inlet, and the refrigerant inlet pressure of the measured condenser is adjusted through the variable frequency compressor.

[0014] Further, both ends of the measured evaporator are connected in parallel with the auxiliary evaporator through a three-way valve.

[0015] Further, the cold water inlet temperature of the measured heat exchanger is adjusted through the electric heater, the cold water inlet flow of the measured heat exchanger is adjusted through the stop valve at the cold water inlet of the measured heat exchanger, the hot water inlet temperature of the measured heat exchanger is adjusted through the dry cooler, and the hot water inlet flow of the measured heat exchanger is adjusted through the stop valve at the hot water inlet of the measured heat exchanger.

[0016] Further, an electronic valve and a ball valve are provided between the refrigerant recovery machine and the vacuum pump.

[0017] Further, a first flow meter is provided between the first variable frequency water pump and the auxiliary condenser, a second flow meter is provided between the dry cooler and the measured heat exchanger, a third flow meter is provided between the measured heat exchanger and the electric heater, and a fourth flow meter is provided between the third variable frequency water pump and the auxiliary evaporator.

[0018] Further, a stop valve is provided between the first flow meter and the first variable frequency water pump, the dry cooler and the second flow meter, the third flow meter and the electric heater, and the third variable frequency water pump and the fourth flow meter.

[0019] Further, the import and export pipelines of the heat exchanger are provided with ball valves.

[0020] Further, the import and export pipelines of the auxiliary condenser, the heat exchanger and the auxiliary evaporator are provided with temperature measuring ports and pressure measuring ports.

[0021] The present application has the following advantages:

[0022] (1) The heat exchanger performance testing system provided by the present application is convenient to adjust the flow, temperature and pressure, the water inlet pressure of the experimental element is adjusted by controlling the frequency conversion water pump, the defect that the testing platform on the market can only adjust the flow of the water inlet of the heat exchanger and cannot control the water inlet pressure is effectively solved, and the system can realize the multi-aspect research on the heat exchange efficiency of the heat exchanger.

[0023] (2) The heat exchanger performance testing system provided by the present application is convenient to adjust the flow, temperature and pressure, the water inlet temperature of the experimental element is adjusted by controlling the dry cooler, the electric heater, the water tank fan and the cooling water tower, the defect that the testing platform on the market can adjust the flow of the water inlet of the heat exchanger but cannot control the water inlet temperature is effectively solved, and the system can realize the multi-aspect research on the heat exchange efficiency of the heat exchanger.

[0024] (3) The heat exchanger performance testing system provided by the present application is convenient to adjust the flow, temperature and pressure, the water-water heat exchanger, the condenser and the evaporator heat exchange experiment are realized, the defect that the heat exchanger, the condenser and the boiling heat exchange experiment testing platform on the market are poor in openness, can only do single experiment and have limited applicability and cannot be used for multiple purposes is solved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure schematic view of the heat exchanger performance testing system of the present application.

[0026] In the figure, 1 - variable frequency compressor, 2 - oil separator, 3 - oil storage tank, 4 - dry cooler, 5 - refrigerant recovery machine, 6 - vacuum pump, 7 - measured condenser, 8 - auxiliary condenser, 9 - first variable frequency water pump, 10 - filter, 11 - dry cooler, 12 - first water tank electric heater, 13 - hot water tank, 14 - water tank fan, 15 - measured heat exchanger, 16 - electric heater, 17 - second variable frequency water pump, 18 - cooling water tower, 19 - cold water tank, 20 - third variable frequency water pump, 21 - first filter, 22 - second filter, 23 - subcooler, 24 - second water tank electric heater, 25 - fourth variable frequency water pump, 26 - auxiliary evaporator, 27 - expansion valve, 28 - measured evaporator, 29 - check valve, 30 - first electronic valve, 31 - second electronic valve, 32 - third electronic valve, 33 - first three-way valve, 34 - second three-way valve, 35 - third three-way valve, 36 - fourth three-way valve, 37 - first stop valve, 38 - second stop valve, 39 - third stop valve, 40 - fourth stop valve, 41 - first ball valve, 42 - second ball valve, 43 - third ball valve, 44 - fourth ball valve, 45 - fifth ball valve, 46 - sixth ball valve, 47 - first mass flow meter, 48 - second mass flow meter, 49 - first flow meter, 50 - second flow meter, 51 - third flow meter, 52 - fourth flow meter. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0028] A heat exchanger performance test system with convenient flow, temperature and pressure regulation comprises a refrigerant supply system, a hot water circulation system and a cold water circulation system.

[0029] The refrigerant supply system comprises a variable frequency compressor 1, an oil separator 2, a dry cooler 4, a first mass flow meter 47, an auxiliary condenser 8, a subcooler 23, an expansion valve 27, a second mass flow meter 48 and an auxiliary evaporator 26, and is connected in sequence to form a circuit according to the flow direction of the refrigerant; the oil storage tank 3 is connected to the variable frequency compressor 1 and the oil separator 2 respectively; the refrigerant recovery machine 5 and the vacuum pump 6 are connected to the dry cooler 4 and the variable frequency compressor 1 respectively; the measured condenser 7 is connected in parallel with the auxiliary condenser 8; and the measured evaporator 28 is connected in parallel with the auxiliary evaporator 26.

[0030] The hot water circulation system comprises a hot water tank 13, a filter 10, a first variable frequency water pump 9, a first flow meter 49, an auxiliary condenser 8, a dry cooler 11, a second flow meter 50 and a measured heat exchanger 15, and is connected in sequence to form a circuit; the water tank fan 14 is connected in parallel with the hot water tank 13; and the water tank electric heater 12 is connected in parallel with the hot water tank 13.

[0031] The cold water circulation system comprises a cold water tank 19, a filter 22, a water tank electric heater 24, a variable frequency water pump 25, a flow meter 52, an auxiliary evaporator 26, an electric heater 16, a third flow meter 51 and a measured heat exchanger 15, and are connected in sequence to form a loop; the second variable frequency water pump 17, the cooling water tower 18 and the cold water tank 19 are connected in series to form a loop; the cold water tank 19, the third variable frequency water pump 20, the filter 21 and the supercooler 23 are connected in series to form a loop.

[0032] More specifically, an electronic valve is arranged between the dry cooler 4 and the refrigerant recovery machine 5, and between the refrigerant recovery machine 5 and the variable frequency compressor 1, which are respectively a first electronic valve 30 and a third electronic valve 32.

[0033] More specifically, a second electronic valve 31 and a first ball valve 41 are arranged between the refrigerant recovery machine 5 and the vacuum pump 6.

[0034] More specifically, a second ball valve 42 is arranged between the vacuum pump 6 and the variable frequency compressor 1.

[0035] More specifically, a three-way valve is arranged between the first mass flow meter 47 and the auxiliary condenser 8, between the auxiliary condenser 8 and the supercooler 23, between the second mass flow meter 48 and the auxiliary evaporator 26, and between the auxiliary evaporator 26 and the variable frequency compressor 1, which are respectively a first three-way valve 33, a second three-way valve 34, a third three-way valve 35 and a fourth three-way valve 36.

[0036] More specifically, a stop valve is arranged between the first flow meter 49 and the first variable frequency water pump 9, between the dry cooler 11 and the second flow meter 50, between the third flow meter 51 and the electric heater 16, and between the third variable frequency water pump 25 and the fourth flow meter 52, which are respectively a first stop valve 37, a second stop valve 38, a third stop valve 39 and a fourth stop valve 40.

[0037] More specifically, a ball valve is arranged in the inlet and outlet pipelines of the measured heat exchanger 15, which are respectively a third ball valve 43, a fourth ball valve 44, a fifth ball valve 45 and a sixth ball valve 46.

[0038] More specifically, temperature measuring ports and pressure measuring ports are arranged in the inlet and outlet pipelines of the auxiliary condenser 8, the measured heat exchanger 15 and the auxiliary evaporator 26.

[0039] The steps of the test system when testing the performance of the condenser, evaporator and water-water heat exchanger are as follows:

[0040] ① When testing the performance of the condenser, close the first three-way valve 33 at the inlet of the measured condenser and the second three-way valve 34 at the outlet, connect the water path of the measured condenser 7 with pipe joints, and connect the fluorine path with flanges, ensuring that there is no air leakage and water leakage; open the first ball valve 41 of the vacuum pump 6 and the first electronic valve 30 of the refrigerant recovery machine 5, and after emptying the internal air, close the first ball valve 41 of the vacuum pump 6 and the first electronic valve 30 of the refrigerant recovery machine 5.

[0041] Open the first three-way valve 33 at the inlet of the measured condenser 7 and the second three-way valve 34 at the outlet; adjust the refrigerant inlet temperature of the measured condenser 7 through the dry cooler 4, adjust the measured condenser refrigerant inlet flow through the condenser inlet first three-way valve 33, adjust the measured condenser refrigerant inlet pressure through the variable frequency compressor 1, adjust the measured condenser water path inlet temperature through the water tank electric heater 12 and the water tank fan 14, adjust the measured condenser hot water inlet flow through the first stop valve 37, and adjust the measured condenser hot water inlet pressure through the first variable frequency water pump 9. Until the working condition parameters of the measured condenser 8 meet the requirements and reach stability, start recording and calculating the working condition parameters and performance parameters of the measured condenser 8.

[0042] ② When testing the performance of the evaporator, close the fourth three-way valve 36 at the inlet of the measured evaporator and the third three-way valve 35 at the outlet, connect the water path of the measured evaporator 28 with pipe joints, and connect the fluorine path with flanges, ensuring that there is no air leakage and water leakage; open the second ball valve 42 of the vacuum pump and the third electronic valve 32 of the refrigerant recovery machine, and after emptying the internal air, close the second ball valve 42 of the vacuum pump and the third electronic valve 32 of the refrigerant recovery machine. Open the fourth three-way valve 36 at the inlet of the measured evaporator and the third three-way valve 35 at the outlet, adjust the refrigerant inlet temperature of the measured evaporator through the subcooler 23, adjust the measured evaporator refrigerant inlet flow through the fourth three-way valve 36 at the inlet of the evaporator, adjust the measured evaporator refrigerant inlet pressure through the third variable frequency water pump 20, adjust the measured evaporator water path inlet temperature through the cooling water tower 18 and the water tank electric heater 24, adjust the measured evaporator cold water inlet flow through the fourth stop valve 40, and adjust the measured evaporator cold water inlet pressure through the fourth variable frequency water pump 25. Until the working condition parameters of the measured evaporator 28 meet the requirements and reach stability, start recording and calculating the working condition parameters and performance parameters of the measured evaporator 28.

[0043] ③ When testing the performance of the heat exchanger, open the first three-way valve 33 at the inlet of the auxiliary condenser, the second three-way valve 34 at the outlet of the auxiliary condenser, the fourth three-way valve 36 at the inlet of the auxiliary evaporator, and the third three-way valve 35 at the outlet of the auxiliary evaporator; close the sixth valve 46 at the cold water inlet of the measured heat exchanger, the fifth ball valve 45 at the cold water outlet, the third ball valve 43 at the hot water inlet, and the fourth ball valve 44 at the hot water outlet, connect the waterway interface of the measured heat exchanger 15 with a pipe joint, adjust the temperature at the cold water inlet of the measured heat exchanger through the electric heater 16, adjust the flow rate at the cold water inlet of the measured heat exchanger through the third stop valve 39 at the cold water inlet, adjust the temperature at the hot water inlet of the measured heat exchanger through the dry cooler 11, and adjust the flow rate at the hot water inlet of the measured heat exchanger through the second stop valve 38 at the hot water inlet. Until the working condition parameters of the measured heat exchanger 15 meet the requirements and reach stability, start recording and calculating the working condition parameters and performance parameters of the measured heat exchanger 15.

[0044] The above examples are only used to illustrate the design idea and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and the protection scope of the present application is not limited to the above examples. Therefore, any equivalent changes or modifications made according to the principles and design ideas disclosed by the present application are within the protection scope of the present application.

Claims

1. A flow, temperature and pressure regulated convenient heat exchanger performance test system, characterized in that, The refrigerant supply system, the hot water circulation system and the cold water circulation system realize the experiment on the water-water heat exchanger, the condenser and the evaporator through the parallel auxiliary condenser (7) and the auxiliary evaporator (28); The refrigerant supply system comprises a variable frequency compressor (1), an oil separator (2), a first dry cooler (4), a measured condenser (8), a supercooler (23), an expansion valve (27), a measured evaporator (26), and is sequentially connected to form a circuit in the order of the flow direction of the refrigerant; a refrigerant recovery machine (5) and a vacuum pump (6) are respectively connected to the first dry cooler (4) and the variable frequency compressor (1); the measured condenser (8) is connected in parallel with the auxiliary condenser (7); the measured evaporator (26) is connected in parallel with the auxiliary evaporator (28); The hot water circulation system comprises a hot water tank (13), a third filter (10), a first variable frequency water pump (9), a measured condenser (8), a second dry cooler (11), a second flowmeter (50) and a measured heat exchanger (15), and is sequentially connected to form a circuit; the hot water tank (13) is further connected in parallel with a water tank fan (14) and a first water tank electric heater (12); The cold water circulation system comprises a cold water tank (19), a filter (22), a second water tank electric heater (24), a fourth variable frequency water pump (25), a measured evaporator (26), an electric heater (16), a third flowmeter (51) and a measured heat exchanger (15), and is sequentially connected to form a circuit; a second variable frequency water pump (17), a cooling water tower (18) and the cold water tank (19) are connected in series to form a circuit; the cold water tank (19), a third variable frequency water pump (20), a first filter (21) and the supercooler (23) are sequentially connected in series to form a circuit; Both ends of the measured condenser (8) are connected in parallel with the auxiliary condenser (7) through a three-way valve, the refrigerant inlet flow of the measured condenser (8) is adjusted through a three-way valve at the condenser inlet, and the refrigerant inlet pressure of the measured condenser is adjusted through the variable frequency compressor (1); Both ends of the measured evaporator (26) are connected in parallel with the auxiliary evaporator (28) through a three-way valve; The cold water inlet temperature of the measured heat exchanger (15) is adjusted through the electric heater (16), the cold water inlet flow of the measured heat exchanger (15) is adjusted through a stop valve at the cold water inlet of the measured heat exchanger (15), the hot water inlet temperature of the measured heat exchanger (15) is adjusted through the second dry cooler (11), and the hot water inlet flow of the measured heat exchanger (15) is adjusted through a stop valve at the hot water inlet of the measured heat exchanger (15).

2. The performance test system for a heat exchanger according to claim 1, wherein The variable frequency compressor (1) and the oil separator (2) are connected in series with an oil storage barrel (3) to form a circuit.

3. The performance test system for heat exchanger according to claim 1 or 2, wherein, An electronic valve and a ball valve are arranged between the refrigerant recovery machine (5) and the vacuum pump (6).

4. The performance test system for heat exchangers of claim 3, wherein, A first flowmeter (49) is arranged between the first variable frequency water pump (9) and the measured condenser (8), a second flowmeter (50) is arranged between the second dry cooler (11) and the measured heat exchanger (15), a third flowmeter (51) is arranged between the measured heat exchanger (15) and the electric heater (16), and a fourth flowmeter (52) is arranged between the fourth variable frequency water pump (25) and the measured evaporator (26).

5. The performance test system for heat exchanger according to claim 4, wherein, A stop valve is arranged between the first flowmeter (49) and the first variable frequency water pump (9), between the second dry cooler (11) and the second flowmeter (50), between the third flowmeter (51) and the electric heater (16), and between the fourth variable frequency water pump (25) and the fourth flowmeter (52).

6. The performance test system for heat exchanger according to claim 3, wherein, A ball valve is arranged on the inlet and outlet pipelines of the measured heat exchanger (15).

7. The performance test system for heat exchanger according to claim 3, wherein, Temperature measuring ports and pressure measuring ports are arranged on the inlet and outlet pipelines of the auxiliary condenser (7), the measured heat exchanger (15) and the auxiliary evaporator (28).

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