Energy-saving water-water heat pump hot water machine performance test system

Abstract

The application discloses an energy-saving water-water heat pump hot water machine performance test system, which comprises a tap water injection mechanism, a condensation side constant temperature water tank, a water-water plate heat exchanger, an evaporation side constant temperature water tank, cold and heat supplement constant temperature equipment, and various circulating water pumps, thermometers and flow regulating valves. The water temperature in the condensation side constant temperature water tank is kept constant through tap water injection and heat release of the water-water plate heat exchanger, the water temperature in the evaporation side constant temperature water tank is kept constant through the hot water overflowing from the condensation side constant temperature water tank to supplement heat, heat absorption of the water-water plate heat exchanger and adjustment of the cold and heat supplement constant temperature equipment working condition machine, and the energy consumption is greatly reduced during performance test of the water-water heat pump hot water machine, so that the energy-saving purpose is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water-water heat pump hot water machine performance testing, and particularly relates to an energy-saving water-water heat pump hot water machine performance testing system. BACKGROUND

[0002] In the prior art, the performance testing of a water-water heat pump hot water machine needs to set a condensing side constant temperature water tank and an evaporating side constant temperature water tank of the tested machine in a laboratory, and a constant temperature device for adjusting the cold and heat quantity of the condensing side and evaporating side constant temperature water tanks is also provided. During the testing process, the two constant temperature devices for adjusting the cold and heat quantity are turned on to maintain the water temperature in the condensing side constant temperature water tank and the water temperature in the evaporating side constant temperature water tank of the tested water-water heat pump hot water machine at the respective set values, so as to achieve the purpose of testing the constant temperature performance of the water-water heat pump hot water machine. This traditional testing system consumes too much energy, which is not in line with the policy of energy saving and emission reduction and carbon neutralization. Therefore, it is necessary to study an energy-saving testing system. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides an energy-saving water-water heat pump hot water machine performance testing system, which can reduce the energy consumption in the constant temperature performance testing process of a water-water heat pump hot water machine, thereby achieving the purposes of reducing the testing cost and saving energy.

[0004] The present application provides an energy-saving water-water heat pump hot water machine performance testing system. The water-water heat pump hot water pump unit includes a condenser and an evaporator. The testing system includes a condensing side constant temperature water tank, an evaporating side constant temperature water tank, a tap water injection mechanism, a water-water plate heat exchanger, and a cold and heat quantity supplement constant temperature device,

[0005] The water inlet of the condenser is connected with the water outlet of the condensing side constant temperature water tank through a condensing side circulating water pump. The water outlet of the condenser is connected with a first condensing water outlet pipe. The first condensing water outlet pipe is connected with a first water inlet of the water-water plate heat exchanger. A first flow regulating valve is arranged on the first condensing water outlet pipe. The first water outlet of the water-water plate heat exchanger is connected with the water inlet of the condensing side constant temperature water tank. The water outlet of the condenser is also connected with the water inlet of the condensing side constant temperature water tank through a second condensing water outlet pipe. A second flow regulating valve is arranged on the second condensing water outlet pipe. The tap water injection mechanism is connected with the water inlet of the condensing side constant temperature water tank through a third flow regulating valve.

[0006] The water inlet of the evaporator is connected with the first water outlet of the evaporation side constant temperature water tank through an evaporation side circulating water pump, the water outlet of the evaporator is connected with the first steam outlet pipe, the fourth flow regulating valve is arranged on the first steam outlet pipe, the first steam outlet pipe is connected with the second water inlet of the water-water plate heat exchanger, the second water outlet of the water-water plate heat exchanger is connected with the water inlet of the evaporation side constant temperature water tank, the water outlet of the evaporator is also connected with the water inlet of the evaporation side constant temperature water tank through the second steam outlet pipe, the fifth flow regulating valve is arranged on the second steam outlet pipe, the overflow outlet of the condensation side constant temperature water tank is connected with the water inlet of the evaporation side constant temperature water tank through the sixth flow regulating valve, the second water outlet of the evaporation side constant temperature water tank is connected with the water inlet of the cold and heat supplement constant temperature device, and the water inlet of the evaporation side constant temperature water tank is connected with the water outlet of the cold and heat supplement constant temperature device.

[0007] The hot water machine test system of the embodiment of the application has at least the following beneficial effects:

[0008] Firstly, the water-water heat pump hot water machine to be tested starts to work, if the water temperature in the condensation side constant temperature water tank is less than the set value of the test, the second flow regulating valve and the fifth flow regulating valve are fully opened, the first flow regulating valve, the third flow regulating valve, the fourth flow regulating valve and the sixth flow regulating valve are closed, the hot water in the condenser is all led into the condensation side constant temperature water tank, so that the water temperature in the condensation side constant temperature water tank is quickly increased to the condensation set value, the cold water in the evaporator is all led into the evaporation side constant temperature water tank, the water temperature of the evaporation side constant temperature water tank is reduced, in order to increase the water temperature of the evaporation side constant temperature water tank to the evaporation set value, the cold and heat supplement constant temperature device is started to supplement the lacking heat for the evaporation side constant temperature water tank, so that the water temperature of the evaporation side constant temperature water tank is increased to the evaporation set value.

[0009] When the water temperature in the condensing side constant temperature water tank is higher than the set value because of the hot water from the condenser, at this time the first flow regulating valve is opened on the condensing side, the second flow regulating valve is maintained in the opened state, and the fourth flow regulating valve is simultaneously opened on the evaporating side. By opening the first flow regulating valve, the hot water from the condenser is divided into two paths, and by adjusting the opening degrees of the first flow regulating valve and the second flow regulating valve respectively, the flow of the hot water into the water-water plate heat exchanger and the flow of the hot water into the second condensing water outlet pipe are controlled. The hot water into the water-water plate heat exchanger exchanges heat with the cold water from the evaporator and into the water-water plate heat exchanger, and the temperature is reduced, and the energy consumed to reduce the temperature of the hot water is not provided by the external cold and heat supplement constant temperature device. The water temperature in the condensing side constant temperature water tank is maintained at the condensing set value by the cold provided by the cold water from the evaporator and into the water-water plate heat exchanger. Further, when the cold provided by the cold water from the evaporator and into the water-water plate heat exchanger is insufficient to maintain the water temperature in the condensing side constant temperature water tank at the condensing set value, tap water is introduced into the condensing side constant temperature water tank by opening the third flow regulating valve, and the flow of the injected tap water is controlled by adjusting the opening degree of the third flow regulating valve, and the cold lacking in the condensing side constant temperature water tank at this time is supplemented by introducing tap water.

[0010] Further, when the water temperature in the condensing side constant temperature water tank is raised due to the hot water from the condenser, the water temperature in the evaporating side constant temperature water tank is lowered due to the cold water from the evaporator, so the fourth flow regulating valve is opened while the first flow regulating valve is opened, and the fifth flow regulating valve is kept open. The cold water from the evaporator is divided into two paths by opening the fourth flow regulating valve. One path of the cold water enters the water-water plate heat exchanger through the first evaporating water pipe and exchanges heat with the hot water from the condenser entering the water-water plate heat exchanger, so the temperature of the cold water is raised, and the energy consumed for raising the temperature of the cold water is not provided by the external cold and heat supplement constant temperature device, but by the heat provided by the hot water from the condenser entering the water-water plate heat exchanger, so that the water temperature in the evaporating side constant temperature water tank is maintained at the evaporating set value. Further, when the cold energy provided by the cold water from the evaporator entering the water-water plate heat exchanger is insufficient to maintain the water temperature in the condensing side constant temperature water tank at the condensing set value, it means that the heat provided by the hot water from the condenser entering the water-water plate heat exchanger is also insufficient to maintain the water temperature in the evaporating side constant temperature water tank at the evaporating set value, so when the third flow regulating valve is opened on the condensing side, the sixth flow regulating valve is also opened on the evaporating side. By opening the sixth flow regulating valve, the hot water overflowing from the overflow pipe of the condensing side constant temperature water tank after the tap water is injected is introduced. It is worth noting that the hot water mentioned here is relative to the water in the evaporating side constant temperature water tank, because the temperature of the water overflowing from the overflow pipe of the condensing side constant temperature water tank is still higher than the temperature of the water in the evaporating side constant temperature water tank after the tap water is injected, so introducing the hot water overflowing from the overflow pipe of the condensing side constant temperature water tank into the evaporating side constant temperature water tank not only provides the missing part of the heat for the evaporating side, but also recovers the heat of the hot water overflowing from the condensing side constant temperature water tank. Further, if the heat of the hot water from the condenser entering the water-water plate heat exchanger and the hot water overflowing from the condensing side constant temperature water tank is still insufficient to provide the missing heat for the evaporating side constant temperature water tank, the cold and heat supplement device is used to supplement the small part of the missing heat. Further, if the heat of the evaporating side constant temperature water tank is excessive after the hot water overflowing from the condensing side constant temperature water tank is introduced, the opening of the sixth flow regulating valve can be reduced or the cold and heat supplement device can be used to provide the missing cold energy.

[0011] Finally, when the water temperature in the condensing side constant temperature water tank and the evaporating side constant temperature water tank is maintained at the respective set values and maintained for a period of time, the constant temperature performance of the water-water heat pump water heater being tested is tested, and the test data is recorded.

[0012] In summary, the hot water machine test system of the embodiment of the present application, by introducing the tap water injection structure and the water-water plate heat exchanger, when the water temperature in the condensing side constant temperature water tank is higher than the condensing setting value because of the hot water from the condenser, the cold energy that should be supplemented by the cold heat supplement constant temperature device arranged outside the condensing side in the prior art becomes the cold water entering the water-water plate heat exchanger from the evaporator, or the cold water entering the water-water plate heat exchanger from the evaporator and the injected tap water, and it can be understood that when the water temperature in the condensing side constant temperature water tank is higher than the condensing setting value because of the hot water from the condenser, the water temperature in the evaporating side constant temperature water tank is also lower than the evaporating setting value because of the cold water from the evaporator, at this time, the embodiment of the present application changes the heat that should be supplemented by the cold heat constant temperature supplement device arranged outside the evaporating side in the prior art into the condenser outlet water entering the water-water plate heat exchanger, or the condenser outlet water entering the water-water plate heat exchanger and the hot water overflowing from the condensing side constant temperature water tank, or the condenser outlet water entering the water-water plate heat exchanger, the hot water overflowing from the condensing side constant temperature water tank and the cold heat constant temperature supplement device, and in the case that the lacking heat is supplemented by the condenser outlet water entering the water-water plate heat exchanger, the hot water overflowing from the condensing side constant temperature water tank and the cold heat constant temperature supplement device, most of the lacking heat in the evaporating side constant temperature water tank is provided by the condenser outlet water entering the water-water plate heat exchanger and the hot water overflowing from the condensing side constant temperature water tank, and the cold heat supplement constant temperature device is only used to supplement a small part of the lacking heat. And when the heat of the evaporating side constant temperature water tank is excessive, the opening of the sixth flow regulating valve can be adjusted to reduce the lacking cold energy without the cold heat supplement constant temperature device, so that the water-water heat pump hot water machine test system of the embodiment of the present application has lower energy consumption, lower test cost and can achieve the purpose of energy saving compared with the existing water-water heat pump hot water machine system in the test process.

[0013] Optionally, in an embodiment of the present application, the second condenser outlet water pipe is arranged on the first condenser outlet water pipe.

[0014] Optionally, in an embodiment of the present application, the tap water injection mechanism connects the water inlet of the condensing side constant temperature water tank through a tap water pipe, the third flow regulating valve is arranged on the tap water pipe, and the tap water pipe is arranged on the second condenser outlet water pipe.

[0015] Optionally, in an embodiment of the present application, the second outlet of the water-water plate heat exchanger is connected with the water inlet of the evaporating side constant temperature water tank through the second evaporator outlet water pipe.

[0016] Optionally, in an embodiment of the present application, a first water temperature meter is arranged on the condensing side constant temperature water tank, a first valve, a first flow meter and a second water temperature meter are arranged on the pipeline connecting the water outlet of the condensing side constant temperature water tank and the water inlet of the condenser, a third water temperature meter is arranged at the water outlet of the condenser, and the tap water pipe is sequentially provided with the third flow regulating valve, the second flow meter and the fourth water temperature meter from the water inlet to the connection with the second condensing water outlet pipe.

[0017] Optionally, in an embodiment of the present application, a fifth water temperature meter is arranged on the evaporating side constant temperature water tank, a second valve, a third flow meter and a sixth water temperature meter are arranged on the pipeline connecting the water outlet of the evaporating side constant temperature water tank and the water inlet of the evaporator, and a seventh water temperature meter is arranged on the water outlet pipe of the evaporator.

[0018] Optionally, in an embodiment of the present application, the second water outlet of the evaporating side constant temperature water tank is sequentially provided with a third valve and a cold and heat supplement circulating water pump from the water inlet of the cold and heat supplement constant temperature device.

[0019] Optionally, in an embodiment of the present application, the cold and heat supplement constant temperature device is an air-cooled cold and hot water unit.

[0020] Optionally, in an embodiment of the present application, the cold and heat supplement constant temperature device is a water-cooled cold and hot water unit.

[0021] Optionally, in an embodiment of the present application, the test system further comprises a redundant water collecting tank, the overflow outlet of the condensing side constant temperature water tank is connected with the water inlet of the redundant water collecting tank through a seventh flow regulating valve, the evaporating side constant temperature water tank is further provided with an overflow outlet, the overflow outlet of the evaporating side constant temperature water tank is connected with the water inlet of the redundant water collecting tank through a fourth valve, and a fifth valve is arranged on the water outlet pipe of the redundant water collecting tank. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the technical scheme of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical scheme of the present application, and do not constitute a limitation on the technical scheme of the present application.

[0023] Figure 1 is a specific structure schematic diagram of the energy-saving water-water heat pump hot water machine performance test system of the embodiment of the present application.

[0024] Reference signs:

[0025] condenser 110; evaporator 120; condensation side constant temperature water tank 130; overflow of condensation side constant temperature water tank 131; evaporation side constant temperature water tank 140; first water outlet of evaporation side constant temperature water tank 141; second water outlet of evaporation side constant temperature water tank 142; overflow of evaporation side constant temperature water tank 143; tap water injection mechanism 150; water-water plate heat exchanger 160; first water inlet of water-water plate heat exchanger 161; first water outlet of water-water plate heat exchanger 162; second water inlet of water-water plate heat exchanger 163; second water outlet of water-water plate heat exchanger 164; cold and heat supplement constant temperature device 170; first water thermometer 171; second water thermometer 172; third water thermometer 173; fourth water thermometer 174; fifth water thermometer 175; sixth water thermometer 176; seventh water thermometer 177; first valve 181; second valve 182; third valve 183; fourth valve 184; fifth valve 185; condensation side circulating water pump 191; evaporation side circulating water pump 192; cold and heat supplement circulating water pump 193; first flow meter 1101; second flow meter 1102; third flow meter 1103; first condensation water outlet pipe 1201; second condensation water outlet pipe 1202; first evaporation water outlet pipe 1203; second evaporation water outlet pipe 1204; first flow regulating valve 1301; second flow regulating valve 1302; third flow regulating valve 1303; fourth flow regulating valve 1304; fifth flow regulating valve 1305; sixth flow regulating valve 1306; seventh flow regulating valve 1307; excess water collecting tank 1400. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0027] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0028] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than and the like are understood as not including the number, and above, below and the like are understood as including the number. If it is described that the first and the second are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0029] In the description of the present application, the words such as setting, installing, connecting and the like should be understood in a broad sense unless otherwise explicitly limited, and the skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0030] In the prior art, during the constant temperature performance test of a water-water heat pump water heater in a laboratory, a cold and heat supplement constant temperature device is usually opened at the evaporation side and the condensation side, and the water temperature in the condensation side constant temperature water tank and the water temperature in the evaporation side constant temperature water tank of the water-water heat pump water heater to be tested are maintained at the respective set values through the cooperation of the two cold and heat supplement constant temperature devices. Although this can achieve the purpose of testing the constant temperature performance of the water-water heat pump water heater, the energy consumption is too large, which does not meet the current energy saving demand.

[0031] Based on the above problems, with reference to Figure 1 The embodiment of the present application proposes an energy-saving water-water heat pump water heater performance test system. The water-water heat pump water heater includes a condenser 110 and an evaporator 120. The test system includes a condensation side constant temperature water tank 130, an evaporation side constant temperature water tank 140, a tap water injection mechanism 150, a water-water plate heat exchanger 160 and a cold and heat supplement constant temperature device 170.

[0032] The water inlet of the condenser 110 is connected with the water outlet of the condensation side constant temperature water tank 130 through a condensation side circulating water pump 191. The water outlet of the condenser 110 is connected with a first condensation water outlet pipe 1201. The first condensation water outlet pipe 1201 is connected with a first water inlet 161 of the water-water plate heat exchanger 160. A first flow regulating valve 1301 is arranged on the first condensation water outlet pipe 1201. The first water outlet 162 of the water-water plate heat exchanger 160 is connected with the water inlet of the condensation side constant temperature water tank 130. The water outlet of the condenser 110 is also connected with the water inlet of the condensation side constant temperature water tank 130 through a second condensation water outlet pipe 1202. A second flow regulating valve 1302 is arranged on the second condensation water outlet pipe 1202. The tap water injection mechanism 150 is connected with the water inlet of the condensation side constant temperature water tank 130 through a third flow regulating valve 1303.

[0033] The water inlet of the evaporator 120 is connected with the first water outlet 141 of the evaporation side constant temperature water tank 140 through the evaporation side circulating water pump 192, the water outlet of the evaporator 120 is connected with the first evaporation outlet pipe 1203, the fourth flow regulating valve 1304 is arranged on the first evaporation outlet pipe 1203, the first evaporation outlet pipe 1203 is connected with the second water inlet 163 of the water-water plate heat exchanger 160, the second water outlet 164 of the water-water plate heat exchanger 160 is connected with the water inlet of the evaporation side constant temperature water tank 140, the water outlet of the evaporator 120 is also connected with the water inlet of the evaporation side constant temperature water tank 140 through the second evaporation outlet pipe 1204, the fifth flow regulating valve 1305 is arranged on the second evaporation outlet pipe 1204, the overflow outlet 131 of the condensation side constant temperature water tank 130 is connected with the water inlet of the evaporation side constant temperature water tank 140 through the sixth flow regulating valve 1306, the second water outlet 142 of the evaporation side constant temperature water tank 140 is connected with the water inlet of the cold and heat supplement constant temperature equipment 170, and the water inlet of the evaporation side constant temperature water tank 140 is connected with the water outlet of the cold and heat supplement constant temperature equipment 170.

[0034] It is worth noting that, in order to facilitate understanding of the present application, in the Figure 1 embodiments of the present application, only the condenser 110 and the evaporator 120 of the measured water heater are marked, and those skilled in the art can understand that the measured water heater also has other conventional devices, such as a gas-liquid separator, a filter, a thermal expansion valve and a compressor.

[0035] The water heater test system of the embodiments of the present application has at least the following beneficial effects:

[0036] Firstly, the water-water heat pump water heater to be measured starts to work, if the water temperature in the condensation side constant temperature water tank 130 is less than the set value of the test, the second flow regulating valve 1302 and the fifth flow regulating valve 1305 are fully opened, the first flow regulating valve 1301, the third flow regulating valve 1303, the fourth flow regulating valve 1304 and the sixth flow regulating valve 1306 are closed, the hot water in the condenser 110 is all led into the condensation side constant temperature water tank 130, so that the water temperature in the condensation side constant temperature water tank 130 is quickly increased to the condensation set value, and the cold water in the evaporator 120 is all led into the evaporation side constant temperature water tank 140, so that the water temperature of the evaporation side constant temperature water tank 140 is reduced, in order to increase the water temperature of the evaporation side constant temperature water tank 140 to the evaporation set value, the cold and heat supplement constant temperature equipment 170 is started to supplement the lacking heat for the evaporation side constant temperature water tank 140, so that the water temperature of the evaporation side constant temperature water tank 140 is increased to the evaporation set value.

[0037] When the temperature of the water in the condensing side constant temperature water tank 130 is higher than the set value because of the hot water from the condenser 110, at this time the first flow regulating valve 1301 is opened on the condensing side, the second flow regulating valve 1302 is maintained in the opened state, and the fourth flow regulating valve 1304 is opened on the evaporating side at the same time. By opening the first flow regulating valve 1301, the hot water from the condenser 110 is divided into two paths, and by adjusting the opening degrees of the first flow regulating valve 1301 and the second flow regulating valve 1302 respectively, the flow of the hot water into the water-water plate heat exchanger 160 and the flow of the hot water into the second condensing water outlet pipe 1202 are controlled. The hot water into the water-water plate heat exchanger 160 exchanges heat with the cold water from the evaporator 120 and into the water-water plate heat exchanger 160, and the temperature of the hot water is reduced, and the energy consumed to reduce the temperature of the hot water is not provided by the external cold and heat supplement constant temperature device. The temperature of the water in the condensing side constant temperature water tank 130 is maintained at the condensing set value by the cold provided by the cold water from the evaporator 120 and into the water-water plate heat exchanger 160. Further, when the cold provided by the cold water from the evaporator 120 and into the water-water plate heat exchanger 160 is insufficient to maintain the temperature of the water in the condensing side constant temperature water tank 130 at the condensing set value, by opening the third flow regulating valve 1303, tap water is introduced into the condensing side constant temperature water tank 130, and by adjusting the opening degree of the third flow regulating valve 1303, the flow of the injected tap water is controlled, and the cold lacking in the condensing side constant temperature water tank 130 at this time is supplemented by introducing tap water.

[0038] Further, when the water temperature in the condensing side constant temperature water tank 130 increases due to the hot water from the condenser 110, the water temperature in the evaporating side constant temperature water tank 140 decreases due to the cold water from the evaporator 120, so the fourth flow regulating valve 1304 is opened, the fifth flow regulating valve 1305 is kept in the open state, and the cold water from the evaporator 120 is divided into two paths, one of which enters the water-water plate heat exchanger 160 through the first evaporating water outlet pipe 1203 and exchanges heat with the hot water from the condenser 110, so the temperature of the cold water increases, and the energy consumed by the cold water to increase the temperature is not provided by the external cold-heat supplement constant temperature device 160, but by the heat provided by the hot water from the condenser 110, so that the water temperature in the evaporating side constant temperature water tank 140 is maintained at the evaporating set value, and further, when the cold energy provided by the cold water from the evaporator 120 is insufficient to maintain the water temperature in the condensing side constant temperature water tank 130 at the condensing set value, it means that the heat provided by the hot water from the condenser 110 is also insufficient to maintain the water temperature in the evaporating side constant temperature water tank 140 at the evaporating set value, so when the third flow regulating valve 1303 is opened on the condensing side, the sixth flow regulating valve 1306 is also opened on the evaporating side, and by opening the sixth flow regulating valve 1306, the hot water overflowing from the overflow pipe of the condensing side constant temperature water tank 130 after the tap water is injected is introduced into the evaporating side constant temperature water tank 140, and it is worth noting that the hot water mentioned here is relative to the water in the evaporating side constant temperature water tank 140, because the temperature of the water overflowing from the overflow pipe of the condensing side constant temperature water tank 130 after the tap water is injected is still higher than the temperature of the water in the evaporating side constant temperature water tank 140, so the introduction of the hot water overflowing from the overflow pipe of the condensing side constant temperature water tank 130 into the evaporating side constant temperature water tank 140 not only provides the evaporating side with the heat that is lacking at this time, but also recovers the heat of the hot water overflowing from the condensing side constant temperature water tank 130, and further, if the heat of the hot water from the condenser 110 and the hot water overflowing from the condensing side constant temperature water tank 130 is still insufficient to provide the heat lacking in the evaporating side constant temperature water tank 140 at this time, a cold-heat supplement device is used to supplement a small amount of heat, and further, if the heat in the evaporating side constant temperature water tank 140 is excessive after the introduction of the hot water overflowing from the condensing side constant temperature water tank 130, the opening of the sixth flow regulating valve 1306 can be adjusted or the cold-heat supplement device can be used to provide the lacking cold energy.

[0039] Finally, when the water temperature in the condensing side constant temperature water tank 130 and the evaporating side constant temperature water tank 140 are maintained at the respective set values and maintained for a period of time, the constant temperature performance of the water-water heat pump water heater being tested is started to be tested, and the test data is started to be recorded.

[0040] In summary, the water heater test system of the embodiment of the present application, by introducing the tap water injection structure 150 and the water-water plate heat exchanger 160, when the water temperature in the condensing side constant temperature water tank 130 is higher than the condensing set value because of the hot water from the condenser 110, the cold energy that should be supplemented by the cold heat supplement constant temperature device provided outside the condensing side in the prior art is provided by the cold water entering the water-water plate heat exchanger 160 from the evaporator 120, or by the cold water entering the water-water plate heat exchanger 160 from the evaporator 120 and the injected tap water, and it can be understood that when the water temperature in the condensing side constant temperature water tank 130 is higher than the condensing set value because of the cold water from the evaporator 120, the water temperature in the evaporating side constant temperature water tank 140 is lower than the evaporating set value at this time, the heat that should be supplemented by the cold heat constant temperature supplement device provided outside the evaporating side in the prior art is provided by the water from the condenser 110 entering the water-water plate heat exchanger 160, or by the water from the condenser 110 entering the water-water plate heat exchanger 160 and the hot water overflowing from the condensing side constant temperature water tank 130, or by the water from the condenser 110 entering the water-water plate heat exchanger 160, the hot water overflowing from the condensing side constant temperature water tank 130 and the cold heat constant temperature supplement device 170, and in the case that the missing heat is supplemented by the water from the condenser 110 entering the water-water plate heat exchanger 160, the hot water overflowing from the condensing side constant temperature water tank 130 and the cold heat constant temperature supplement device 170, most of the missing heat of the evaporating side constant temperature water tank 140 is provided by the water from the condenser 110 entering the water-water plate heat exchanger 160 and the hot water overflowing from the condensing side constant temperature water tank 130, and the cold heat supplement constant temperature device 170 is only used to supplement a small part of the missing heat. And when the heat of the evaporating side constant temperature water tank 140 is in excess, the opening of the sixth flow regulating valve 1306 can be adjusted to be smaller, so that the missing cold energy is not supplemented by the cold heat supplement constant temperature device 170. Therefore, compared with the existing water-water heat pump water heater system, the water-water heat pump water heater test system of the embodiment of the present application has low energy consumption, low test cost and can achieve the purpose of energy saving during the test process.

[0041] Reference Figure 1In one embodiment of the present application, the second condensing water outlet pipe 1202 is arranged on the first condensing water outlet pipe 1201. It can be understood that if the second condensing water outlet pipe 1202 and the first condensing water outlet pipe 1201 are arranged separately, the length of the second condensing water outlet pipe 1202 to be laid is longer, that is, the water inlet of the second condensing water outlet pipe 1202 is directly connected to the water outlet of the condenser 110, and then the water outlet of the second condensing pipe is connected to the water inlet of the condensing side constant temperature water tank, which is high in pipe cost. If the second condensing water outlet pipe 1202 is arranged on the first condensing water outlet pipe 1201, the second condensing water outlet pipe 1202 and the first condensing water outlet pipe 1201 can share a part of the water outlet pipe, thereby reducing the laying length of the second condensing water outlet pipe 1202.

[0042] Continuing to refer to Figure 1 In this embodiment, it can be understood that the tap water pipe can be arranged separately from the second condensing water outlet pipe 1202 or arranged on the second condensing water outlet pipe 1202. In order to improve the speed of the temperature of the water in the condensing side constant temperature water tank 130 after mixing to recover to the condensing set value, the tap water pipe is arranged on the second condensing water outlet pipe 1202, so that the tap water is fully mixed with the hot water in the second condensing water outlet pipe 1202 and then flows into the condensing side constant temperature water tank 130. Similarly, further referring to Figure 1 The second water outlet 163 of the water-water plate heat exchanger 160 can be directly connected to the water inlet of the evaporating side constant temperature water tank 140 or connected to the water inlet of the evaporating side constant temperature water tank 140 through the second evaporating water outlet pipe 1204. In order to shorten the time for the temperature of the water in the evaporating side constant temperature water tank 140 after mixing to rise to the evaporating set value, the second water outlet 163 of the water-water plate heat exchanger 160 is connected to the water inlet of the evaporating side constant temperature water tank 140 through the second evaporating water outlet pipe 1202, so that the outlet water of the evaporator 120, which obtains heat from the condenser 110 to increase the temperature, is fully mixed with the cold water flowing into the second evaporating water outlet pipe 1204 from the water outlet of the evaporator 120, and then flows into the evaporating side constant temperature water tank 140.

[0043] Specifically, referring to Figure 1 In this embodiment, the condensing side constant temperature water tank 130 is provided with a first water gauge 171, and the pipe connecting the water outlet of the condensing side constant temperature water tank 130 and the water inlet of the condenser 110 is further provided with a first valve 181, a first flow meter 1101 and a second water gauge 172. The water outlet of the condenser 110 is provided with a third water gauge 173, and the tap water pipe is sequentially provided with a third flow regulating valve 1303, a second flow meter 1102 and a fourth water gauge 174 from the water inlet to the connection with the second condensing water outlet pipe 1202.

[0044] Further, referring to Figure 1 In the embodiment, a fifth water temperature meter 175 is arranged on the evaporating side constant temperature water tank 140, and a second valve 182, a third flow meter 1103 and a sixth water temperature meter 176 are arranged on the pipeline connecting the water outlet of the evaporating side constant temperature water tank 140 and the water inlet of the evaporator 120, and a seventh water temperature meter 177 is arranged on the water outlet of the evaporator 120.

[0045] Specifically, referring to Figure 1 In the embodiment, the second water outlet 142 of the evaporating side constant temperature water tank 140 is sequentially provided with a third valve 183 and a cold and heat supplement circulating water pump 193 to the water inlet of the cold and heat supplement constant temperature device 170. When the heat in the evaporating side constant temperature water tank 140 is insufficient or excessive, the fifth valve 185 is opened, and the cold and heat supplement circulating water pump 193 and the cold and heat supplement constant temperature device 170 are started, the water entering from the evaporating side constant temperature water tank 140 is heated or cooled by the cold and heat supplement constant temperature device 170, and then flows back to the evaporating side constant temperature water tank 170, so as to complete the supplement of heat or cold of the evaporating side constant temperature water tank 170, thereby ensuring that the temperature of the water in the evaporating side constant temperature water tank 170 is maintained at the evaporating setting value.

[0046] Further, it can be understood that the cold and heat supplement constant temperature device 170 in the embodiment can be a wind-cooled cold and hot water unit, or a water-cooled cold and hot water unit, and the embodiment of the present application is not limited thereto, as long as the cold and heat supplement constant temperature device 170 adopted can supplement a small amount of heat when the heat in the evaporating side constant temperature water tank 170 is insufficient, or supplement a small amount of cold when the heat in the evaporating side constant temperature water tank 140 is excessive, so that the temperature of the water in the evaporating side constant temperature water tank 140 is maintained at the evaporating setting value.

[0047] Finally, referring to Figure 1It can be understood that, in order to improve the resource utilization, the test system of the embodiment further comprises a redundant water collecting tank 1400, the overflow port of the condensation side constant temperature water tank 130 is connected with the water inlet of the redundant water collecting tank 1400 through the seventh flow regulating valve 1307, the evaporation side constant temperature water tank 140 is further provided with an overflow port 143, the overflow port 143 of the evaporation side constant temperature water tank 140 is connected with the water inlet of the redundant water collecting tank 1400 through the fourth valve 184, and the outlet pipe of the redundant water collecting tank 1400 is provided with the sixth valve. In the test process, when the heat in the evaporation side constant temperature water tank 140 is excessive, the opening of the sixth flow regulating valve 1306 can be reduced, and the seventh flow regulating valve 1307 is opened, so that the heat in the evaporation side constant temperature water tank 140 is reduced by reducing the hot water overflowing from the condensation side constant temperature water tank 130 into the evaporation side constant temperature water tank 140, so that the water temperature in the evaporation side constant temperature water tank 140 is constant, and the purpose of not needing to start the cold and heat supplement constant temperature device 170 is achieved.

[0048] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. An energy-saving water-water heat pump water heater performance test system, the water-water heat pump water heater comprising a condenser and an evaporator, characterized in that, The test system comprises a condensation side constant temperature water tank, an evaporation side constant temperature water tank, a tap water injection mechanism, a water-water plate heat exchanger and a cold and heat supplement constant temperature device, The water inlet of the condenser is connected with the water outlet of the condensation side constant temperature water tank through a condensation side circulating water pump, the water outlet of the condenser is connected with a first condensation water outlet pipe, the first condensation water outlet pipe is connected with a first water inlet of the water-water plate heat exchanger, a first flow regulating valve is arranged on the first condensation water outlet pipe, a first water outlet of the water-water plate heat exchanger is connected with a water inlet of the condensation side constant temperature water tank, the water outlet of the condenser is also connected with the water inlet of the condensation side constant temperature water tank through a second condensation water outlet pipe, a second flow regulating valve is arranged on the second condensation water outlet pipe, and the tap water injection mechanism is connected with the water inlet of the condensation side constant temperature water tank through a third flow regulating valve. The water inlet of the evaporator is connected with a first water outlet of the evaporation side constant temperature water tank through an evaporation side circulating water pump, the water outlet of the evaporator is connected with a first evaporation water outlet pipe, a fourth flow regulating valve is arranged on the first evaporation water outlet pipe, the first evaporation water outlet pipe is connected with a second water inlet of the water-water plate heat exchanger, a second water outlet of the water-water plate heat exchanger is connected with a water inlet of the evaporation side constant temperature water tank, the water outlet of the evaporator is also connected with the water inlet of the evaporation side constant temperature water tank through a second evaporation water outlet pipe, a fifth flow regulating valve is arranged on the second evaporation water outlet pipe, a water overflow outlet of the condensation side constant temperature water tank is connected with the water inlet of the evaporation side constant temperature water tank through a sixth flow regulating valve, a second water outlet of the evaporation side constant temperature water tank is connected with a water inlet of the cold and heat supplement constant temperature device, and the water inlet of the evaporation side constant temperature water tank is connected with a water outlet of the cold and heat supplement constant temperature device.

2. The water-to-water heat pump hot water machine performance test system according to claim 1, characterized in that, The second condensation water outlet pipe is arranged on the first condensation water outlet pipe.

3. The water-to-water heat pump hot water machine performance test system of claim 2, wherein, The tap water injection mechanism is connected with the water inlet of the condensation side constant temperature water tank through a tap water pipe, the third flow regulating valve is arranged on the tap water pipe, and the tap water pipe is arranged on the second condensation water outlet pipe.

4. The water-to-water heat pump hot water machine performance test system of claim 3, wherein, The second water outlet of the water-water plate heat exchanger is connected with the water inlet of the evaporation side constant temperature water tank through the second evaporation water outlet pipe.

5. The water-to-water heat pump hot water machine performance test system of claim 4, wherein, A first water thermometer is arranged on the condensation side constant temperature water tank, a first valve, a first flowmeter and a second water thermometer are further arranged on a pipeline connecting the water outlet of the condensation side constant temperature water tank and the water inlet of the condenser, a third water thermometer is arranged at the water outlet of the condenser, and the tap water pipe is sequentially provided with the third flow regulating valve, a second flowmeter and a fourth water thermometer from the water inlet to the connection position of the second condensation water outlet pipe.

6. The water-to-water heat pump hot water machine performance test system of claim 5, wherein, A fifth water thermometer is arranged on the evaporation side constant temperature water tank, a second valve, a third flowmeter and a sixth water thermometer are further arranged on a pipeline connecting the water outlet of the evaporation side constant temperature water tank and the water inlet of the evaporator, and a seventh water thermometer is arranged on the water outlet pipe of the evaporator.

7. The water-to-water heat pump hot water machine performance test system of claim 6, wherein, A third valve and a cold and heat supplement circulating water pump are sequentially arranged from the second water outlet of the evaporation side constant temperature water tank to the water inlet of the cold and heat supplement constant temperature device.

8. The water-to-water heat pump hot water machine performance test system of claim 7, wherein, The cold and heat supplement constant temperature equipment is a water-cooled cold and hot water unit.

9. The water-to-water heat pump hot water machine performance test system of claim 7, wherein, The cold and heat supplement constant temperature equipment is a water-cooled cold and hot water unit.

10. The water-to-water heat pump hot water machine performance test system according to claim 8 or 9, characterized in that, The test system further comprises a redundant water collecting tank, an overflow outlet of the condensation side constant temperature water tank is connected with a water inlet of the redundant water collecting tank through a seventh flow regulating valve, the evaporation side constant temperature water tank is further provided with an overflow outlet, the overflow outlet of the evaporation side constant temperature water tank is connected with the water inlet of the redundant water collecting tank through a fourth valve, and a fifth valve is arranged on a water outlet pipe of the redundant water collecting tank.

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