Heat pump energy monitoring method and device and heat pump system

Abstract

The invention relates to an energy monitoring method which comprises the following steps: detecting the water inlet temperature, the water outlet temperature and the water flow of a heat pump, correcting the water inlet temperature and the water outlet temperature according to a calibration value, and calculating the heating capacity or the refrigerating capacity of the heat pump in combination with the data of the water flow. By adopting the energy monitoring method provided by the invention, the effect of higher-precision detection can be realized under the condition that the cost and the process are not changed.

Description

Technical Field

[0001] The invention relates to the field of heat detection, and in particular to a method and device for monitoring the energy of a heat pump. Background Art

[0002] As a natural phenomenon, just as water flows from high to low, heat always flows from high temperature to low temperature. But people can create machines, just as water pumps are used to lift water from low to high, heat pumps can be used to pump heat from low temperature to high temperature. Therefore, a heat pump is essentially a heat lifting device. The function of a heat pump is to absorb heat from the surrounding environment and transfer it to the object to be heated.

[0003] Specifically, see Figure 1 The heat pump includes a heat control unit 10 and a water control unit 20. There is a heat exchange area between the heat control unit 10 and the water control unit 20. The heat control unit 10 includes a compressor 11, a four-way valve 12, a condenser 13, a throttle valve 14, an evaporator 15 and a heat control tube 16. Each device is connected through the heat control tube 16. When the heat control unit 10 is working, the refrigerant flows in the heat control tube 16. The water control unit 20 includes a water pump 21 and a water pipe. The water pump 21 is directly set in the water pipe. The water pipe includes an inlet pipe 221, a heat exchange pipe 222 and an outlet pipe 223. The water pipe on the water inlet side of the heat exchange pipe 222 is the inlet pipe 221, and the water pipe on the water outlet side is the outlet pipe 223. The heat exchange pipe 222 forms a heat exchange area with the condenser 13. The water pump 21 provides power to the water in the water pipe, so that it normally enters from the inlet pipe and flows out from the outlet pipe.

[0004] When the external environment is a water source environment, under natural conditions, where the heat pump absorbs heat depends on the temperature of its own refrigerant and the inlet water temperature, but the user cannot directly know the operation of the heat pump, and needs to use the energy efficiency of the heat pump as an indicator. Therefore, it is necessary to set up sensors to detect the inlet water temperature, outlet water temperature and water flow rate, so as to detect the heating or cooling capacity of the heat pump, and then calculate the heating energy efficiency or cooling energy efficiency of the heat pump, so as to intuitively and conveniently monitor the operation of the heat pump.

[0005] See also Figure 2 The existing energy monitoring device includes an inlet water temperature sensor 31, an outlet water temperature sensor 32, a flow sensor 33 and a processor (not shown in the figure). The inlet water temperature sensor 31 detects the temperature of water in the water inlet pipe, the outlet water temperature sensor 32 detects the temperature of water in the water outlet pipe, and the flow sensor 33 detects the size of the water flow in the water pipe.

[0006] See also Figure 3The processor includes a comprehensive calculation module, which directly calculates the heating capacity or cooling capacity of the heat pump according to the water inlet temperature data of the water inlet temperature sensor 31, the water outlet temperature data of the water outlet temperature sensor 32 and the water flow data of the flow sensor 33.

[0007] However, since different temperature sensors may have differences, even at the same temperature, there may be a detection difference between the water inlet temperature detected by the water inlet temperature sensor 31 and the water outlet temperature detected by the water outlet temperature sensor 32, and the detection difference may be positive, zero, or negative. This detection difference leads to a decrease in detection accuracy. If the detection difference is to be reduced, a higher-precision temperature sensor must be used, which in turn increases the cost of the system. Summary of the invention

[0008] Based on this, the purpose of the present invention is to provide a water temperature change detection method and device, which can realize temperature difference correction while ensuring that the cost remains unchanged, and improve the detection accuracy of the heating or cooling capacity of the heat pump;

[0009] An energy monitoring method detects the inlet water temperature, outlet water temperature and water flow rate of a heat pump, corrects the inlet water temperature and outlet water temperature according to a calibration value, and calculates the heating or cooling capacity of the heat pump in combination with the water flow rate data.

[0010] Furthermore, before the heat pump starts heating or cooling, the internal water flow is started to run alone until the inlet water temperature and outlet water temperature data are stable. Then, the inlet water temperature data within a certain period of time are obtained and the average is calculated to obtain the initial inlet water temperature T in-0 At the same time, obtain the water outlet temperature data during this period, and average them to get the initial water outlet temperature T out-0 , subtract the initial water outlet temperature from the initial water inlet temperature to obtain the calibration value.

[0011] Furthermore, the inlet water temperature T is received in real time. in Data and outlet water temperature T out Data, and use the outlet water temperature T out Subtract the inlet water temperature T in Get the inlet and outlet water temperature difference.

[0012] Furthermore, the inlet and outlet water temperature difference is corrected in real time according to the calibration value to obtain the calibration water temperature difference:

[0013] ΔT=(T out -T in )-(T out-0 -T in-0 )

[0014] Where ΔT is the calibration water temperature difference.

[0015] Furthermore, the heating or cooling capacity of the heat pump is calculated based on the water flow data and the calibrated water temperature difference; when the heat pump is in the heating state, the heating capacity is calculated as:

[0016] Q C =1.163L·ΔT=1.163L[(T out -T in )-(T out-0 -T in-0 )]

[0017] Among them, Q C is the heating capacity, L is the water flow rate, ΔT is the calibration water temperature difference, T in is the inlet water temperature, T out is the outlet water temperature, T in-0 is the initial water inlet temperature, T out-0 is the initial outlet water temperature;

[0018] When the heat pump is in cooling state, the processor calculates the cooling capacity as:

[0019] Q E =1.163L·ΔT=1.163L[(T in -T out )-(T in-0 -T out-0 )]

[0020] Among them, Q E For the cooling capacity.

[0021] The present invention also provides an energy monitoring device, including an inlet water temperature sensor, an outlet water temperature sensor, a flow sensor and a processor, wherein the inlet water temperature sensor detects the temperature of the inlet water of the heat pump, the outlet water temperature sensor detects the temperature of the outlet water of the heat pump, and the flow sensor detects the size of the water flow in the heat pump. The processor corrects the data from the inlet water temperature sensor and the outlet water temperature sensor according to a calibration value, and calculates the heating or cooling capacity of the heat pump in combination with the data from the flow sensor.

[0022] Furthermore, before the heat pump starts heating or cooling, the water in the heat pump starts to flow alone until the temperature data detected by the water inlet temperature sensor and the water outlet temperature sensor are stable. Then, the data of the water inlet temperature sensor within a certain period of time are obtained and averaged to obtain the initial water inlet temperature T in-0 At the same time, the data of the water outlet temperature sensor during this period are obtained and the average is calculated to obtain the initial water outlet temperature T out-0 , subtract the initial water outlet temperature from the initial water inlet temperature to obtain the calibration value.

[0023] Furthermore, the processor includes a temperature difference calculation module for receiving the inlet water temperature T from the inlet water temperature sensor in real time.in Data and the outlet water temperature T from the outlet water temperature sensor out Data, and use the outlet water temperature T out Subtract the inlet water temperature T in Get the inlet and outlet water temperature difference.

[0024] Furthermore, the processor also includes a calibration module, which is used to correct the inlet and outlet water temperature difference in real time according to the calibration value to obtain a calibrated water temperature difference:

[0025] ΔT=(T out -T in )-(T out-0 -T in-0 )

[0026] Where ΔT is the calibration water temperature difference.

[0027] Furthermore, the processor also includes a comprehensive calculation module for calculating the heating or cooling capacity of the heat pump according to the water flow data and the calibration water temperature difference; when the heat pump is in the heating state, the calculated heating capacity is:

[0028] Q C =1.163L·ΔT=1.163L[(T out -T in )-(T out-0 -T in--0 )]

[0029] Among them, Q C is the heating capacity, L is the water flow rate, ΔT is the calibration water temperature difference, T in is the inlet water temperature, T out is the outlet water temperature, T in-0 is the initial water inlet temperature, T out-0 is the initial outlet water temperature;

[0030] When the heat pump is in cooling state, the processor calculates the cooling capacity as:

[0031] Q E =1.163L·ΔT=1.163L[(T in -T out )-(T in-0 -T out-0 )]

[0032] Among them, Q E For the cooling capacity.

[0033] The present invention also provides a heat pump system, comprising a heat pump and the above-mentioned energy monitoring device, wherein the heat pump comprises an inlet pipe and an outlet pipe; the inlet temperature sensor is arranged at the inlet pipe to monitor the temperature of water in the inlet pipe; the outlet temperature sensor is arranged at the outlet pipe to monitor the temperature of water in the outlet pipe; the flow sensor is arranged at the inlet pipe or the outlet pipe to monitor the water flow in the heat pump; the processor is connected to the inlet temperature sensor, the outlet temperature sensor and the flow sensor, corrects the data from the inlet temperature sensor and the outlet temperature sensor according to a calibration value, and calculates the heating capacity or cooling capacity of the heat pump in combination with the data of the flow sensor.

[0034] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is the structural diagram of the existing heat pump.

[0036] Figure 2 This is a structural diagram of an existing energy monitoring device.

[0037] Figure 3 for Figure 2 A module operation diagram of the processor in the energy monitoring device.

[0038] Figure 4 It is a module operation diagram of the processor in the energy monitoring device of the present invention. DETAILED DESCRIPTION

[0039] In order to reduce the impact of the detection difference of the inlet water temperature and the outlet water temperature without increasing the cost of the system, the inventor tried to directly use the data of the existing inlet water temperature sensor and the outlet water temperature sensor to perform correction calculations on the inlet and outlet water temperature difference. By correcting the difference between the inlet water temperature sensor and the outlet water temperature sensor, the calibrated water temperature difference is obtained, thereby obtaining a high-precision heating or cooling capacity of the heat pump.

[0040] Based on the above inventive concept, the present invention provides a heat pump system, including a heat pump and an energy monitoring device for monitoring the heating or cooling capacity of the heat pump.

[0041] The heat pump includes a heat control unit 10 and a water control unit 20, and there is a heat exchange area between the heat control unit 10 and the water control unit 20. Specifically, the heat control unit 10 includes a compressor 11, a four-way valve 12, a condenser 13, a throttle valve 14, an evaporator 15 and a heat control tube 16, each device is connected through the heat control tube 16, and when the heat control unit 10 is working, the refrigerant flows in the heat control tube 16, and the refrigerant is preferably a high-temperature and low-pressure refrigerant, that is, it has a high-temperature boiling point greater than 0°C and a lower condensation pressure threshold, and the heat control tube 16 is preferably made of a material that is resistant to low temperature and high pressure.

[0042] When the heat pump absorbs heat from its own refrigerant and transfers it to the external environment, it is called the heating state, and when the heat pump absorbs heat from the external environment and transfers it to its own refrigerant, it is called the cooling state. The working state of the thermal control unit 10 follows the state of the heat pump. When the heat pump is in the heating state, the refrigerant flows out of the compressor 11. At this time, the refrigerant is a high-temperature and high-pressure gas; the valve port C and the valve port D of the four-way valve 12 are connected, and the refrigerant flows in from the valve port D and flows out from the valve port C, and then enters the condenser 13 to condense and release heat, and becomes a low-temperature and high-pressure liquid; the condensed refrigerant flows out of the condenser 13 and flows into the throttle valve 14. The throttle valve 14 restricts the passage of the low-temperature and high-pressure refrigerant, so that it becomes a low-temperature and low-pressure liquid and then passes through, and the low-temperature and low-pressure refrigerant flows into the evaporator 15, absorbs heat in the evaporator 15 and evaporates to become a low-temperature and low-pressure gas; the valve port E and the valve port S of the four-way valve 12 are connected, and the low-temperature and low-pressure refrigerant flows in from the valve port E and flows out from the valve port S, and finally flows back to the compressor 11, thereby completing a heating cycle.

[0043] The working state of the heat pump can be switched. In one embodiment, the user can change the working state by manually changing the valve port switch of the four-way valve 12 through a mechanical switch. When the heat pump system is in the refrigeration state, the refrigerant flows out of the compressor 11, and the refrigerant is a high-temperature and high-pressure gas at this time; the valve port D and the valve port E of the four-way valve 12 are connected, and the refrigerant flows in from the valve port D and flows out from the valve port E, and then enters the evaporator 15 to become a low-temperature and high-pressure gas; the low-temperature and high-pressure refrigerant flows into the throttle valve 14, and the throttle valve 14 restricts the passage of the low-temperature and high-pressure refrigerant, so that it becomes a low-temperature and low-pressure liquid; the low-temperature and low-pressure refrigerant enters the condenser 13, absorbs heat in the condenser 13 and becomes a low-temperature and low-pressure gas; the valve port C and the valve port S of the four-way valve 12 are connected, and the low-temperature and low-pressure refrigerant flows in from the valve port C and flows out from the valve port S, and finally flows back to the compressor 11, thereby completing a refrigeration cycle.

[0044] The water control unit 20 includes a water pump 21 and a water pipe, and the water pump 21 is directly arranged in the water pipe. The water pipe includes an inlet pipe 221, a heat exchange pipe 222 and an outlet pipe 223. The heat exchange pipe 222 forms a heat exchange area with the condenser 13, and the two can be in contact or non-contact, as long as the heat agent inside each can exchange heat. The water pipe on the water inlet side of the heat exchange pipe 222 is the inlet pipe 221, and the water pipe on the water outlet side is the outlet pipe 223. The water pump 21 provides power to the water in the water pipe, so that it enters normally from the inlet pipe 221 and flows out from the outlet pipe 223. It can be foreseen by those skilled in the art that the installation position of the water pump 21 is not fixed, and can be installed at the inlet pipe 221 or the outlet pipe 223, and the position and the corresponding functional model of the water pump 21 are adaptively selected according to actual needs. The water pump 21 can feedback a PWM signal when working. The PWM signal is a pulse modulation signal of the water pump 21 and is directly correlated with the water flow rate v. For a water pipe with a fixed cross-sectional area, the water flow rate v is positively correlated with the water flow rate L. Therefore, the PWM signal is positively correlated with the water flow rate L. The water flow rate L can be calculated based on the PWM signal. Before and during the operation of the heat pump, the user can set the water temperature and adjust the water flow rate L according to actual needs.

[0045] The energy monitoring device includes an inlet water temperature sensor 31, an outlet water temperature sensor 32, a flow sensor 33 and a processor (not shown). The inlet water temperature sensor 31 is arranged at the water inlet pipe to detect the temperature of the water in the water inlet pipe. The outlet water temperature sensor 32 is arranged at the outlet water pipe to detect the temperature of the water in the outlet water pipe. The flow sensor 33 detects the size of the water flow in the water pipe. The processor corrects the data from the inlet water temperature sensor 31 and the outlet water temperature sensor 32 according to a calibration value, and calculates the heating capacity or cooling capacity of the heat pump in combination with the data from the flow sensor 33.

[0046] The water inlet temperature sensor 31 detects the water inlet temperature T of the water control unit 20 in real time. in The outlet water temperature sensor 32 detects the outlet water temperature T of the water control unit 20 in real time. out Those skilled in the art can foresee that the water inlet temperature sensor 31 and the water outlet temperature sensor 32 only need to satisfy the function of detecting the water temperature. It does not matter whether they are arranged in the middle or on the side of the water pipe or whether they are in direct contact with water. The selection of their models and types is variable.

[0047] The flow sensor 33 is arranged on the water pipe to detect the water flow L flowing through the water pipe. It is foreseeable that the installation position of the flow sensor 33 is not fixed, and can be installed at the water inlet pipe 221 or the water outlet pipe 223, and the installation position is adaptively selected according to actual needs.

[0048] See also Figure 4 The processor includes a temperature difference calculation module, a calibration module and a comprehensive calculation module.

[0049] The temperature difference calculation module is used to receive the inlet water temperature T from the inlet water temperature sensor 31 in real time. in The data and the outlet water temperature T from the outlet water temperature sensor 32 out Data, and use the outlet water temperature T out Subtract the inlet water temperature T in The inlet and outlet water temperature difference is obtained. The inlet water temperature is compared with the set temperature. When the inlet water temperature is higher than the set temperature, the first heating information is fed back; when the inlet water temperature is lower than the set temperature, the first cooling information is fed back. The thermal control unit 10 receives feedback information from the temperature difference calculation module. When the first heating information is received, the thermal control unit 10 enters the heating state; when the first cooling information is received, the thermal control unit 10 enters the cooling state. The outlet water temperature is compared with the set temperature. When the outlet water temperature is higher than the set temperature, the second cooling information is fed back; when the outlet water temperature is lower than the set temperature, the second heating information is fed back. The thermal control unit 10 also receives feedback information from the outlet water detection module. When the second cooling information is received, if the thermal control unit 10 is in the heating state at this time, the heating rate is reduced; if the thermal control unit 10 is in the cooling state at this time, the cooling rate is increased; when the second heating information is received, if the thermal control unit 10 is in the heating state at this time, the heating rate is increased; if the thermal control unit 10 is in the cooling state at this time, the cooling rate is reduced. The water temperature of the heat pump is automatically calibrated through mutual regulation between the temperature difference calculation module and the thermal control unit 10.

[0050] In order to reduce the difference in the detected temperature between the inlet water temperature sensor 31 and the outlet water temperature sensor 32 and improve the detection accuracy, the temperature data received by the processor is calibrated and pre-processed to obtain the calibration value before the thermal control unit 10 starts working. First, the water pump 21 is started alone to start the water control unit 20. After running for a period of time, the inlet water temperature sensor 31 and the outlet water temperature sensor 32 are monitored until the data detected by the inlet water temperature sensor 31 and the outlet water temperature sensor 32 are stable and almost unchanged; then the data of the inlet water temperature sensor 31 within a period of time is obtained, and the average is calculated to obtain the initial inlet water temperature T in-0 At the same time, the data of the outlet water temperature sensor 32 during this period are obtained, and the average is calculated to obtain the initial outlet water temperature T out-0 , subtract the initial water outlet temperature from the initial water inlet temperature to obtain the calibration value.

[0051] The calibration module is used to correct the inlet and outlet water temperature difference in real time according to the calibration value to obtain the calibration water temperature difference

[0052] ΔT=(T out -T in )-(T out-0 -Tin-0 )

[0053] Where ΔT is the calibration water temperature difference.

[0054] The comprehensive calculation module is used to calculate the heating or cooling capacity of the heat pump based on the water flow data and the calibrated water temperature difference. Specifically, when the heat pump system is in the heating state, water at a relatively low temperature enters from the water inlet pipe 221 driven by the water pump 21; when it flows to the heat exchange area through the water inlet temperature sensor 31, the refrigerant in the condenser 13 is liquefied from a high-temperature and high-pressure gas to a low-temperature and high-pressure liquid, releasing a large amount of heat to the surroundings; this heat is transferred to the heat exchange tube 222, so that the water flowing through the water pipe absorbs heat and heats up to obtain higher temperature water, and the higher temperature water flows out of the water outlet pipe 223 through the water outlet temperature sensor 32, thereby achieving a heating effect. In particular, according to the actual working conditions, the constant K=1.163 is selected, and the heating capacity is obtained as follows:

[0055] Q C =1.163L·ΔT=1.163L[(T out -T in )-(T out-0 -T in-0 )]

[0056] Among them, Q C is the heating capacity, L is the water flow rate, ΔT is the calibration water temperature difference, T in is the inlet water temperature, T out is the outlet water temperature, T in-0 is the initial water inlet temperature, T out-0 is the initial outlet water temperature.

[0057] When the heat pump system is in cooling state, water at a relatively high temperature enters from the water inlet pipe 221 driven by the water pump 21; when it flows to the heat exchange area through the water inlet temperature sensor 31, the refrigerant in the condenser 13 is vaporized from a low-temperature and low-pressure liquid to a low-temperature and low-pressure gas, absorbing a large amount of heat from the surroundings; this heat is provided by the water flowing through the heat exchange tube 222, so that the relatively high-temperature water becomes relatively low-temperature water, and the relatively low-temperature water flows out from the water outlet pipe 223 through the water outlet temperature sensor 32, thereby achieving a cooling effect, and the cooling capacity is

[0058] Q E =1.163L·ΔT=1.163L[(T in -T out )-(T in-0 -T out-0 )]

[0059] Among them, Q E For the cooling capacity.

[0060] By adopting the heat pump system of the present invention, the water temperature difference is calibrated, which can solve the temperature detection error problem of the temperature sensor. There is no need to ensure that the type and model of the water inlet temperature sensor and the water outlet temperature sensor are the same. The requirements for the temperature sensor are low, and the same or even higher accuracy as the prior art can be achieved while reducing costs and simplifying processes.

[0061] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. An energy monitoring method, characterized in that: The inlet water temperature, outlet water temperature and water flow rate of the heat pump are detected, the inlet water temperature and outlet water temperature are corrected according to a calibration value, and the heating or cooling capacity of the heat pump is calculated in combination with the water flow rate data.

2. The energy monitoring method according to claim 1, characterized in that: Before the heat pump starts heating or cooling, start the internal water flow alone until the inlet and outlet water temperatures are stable. Obtain the inlet water temperature data for a certain period of time and average them to get the initial inlet water temperature T in-0 At the same time, obtain the water outlet temperature data during this period, and average them to get the initial water outlet temperature T out-0 , subtract the initial water outlet temperature from the initial water inlet temperature to obtain the calibration value.

3. The energy monitoring method according to claim 2, characterized in that: Receive the inlet water temperature T in real time in Data and outlet water temperature T out Data, and use the outlet water temperature T out Subtract the inlet water temperature T in Get the inlet and outlet water temperature difference.

4. The energy monitoring method according to claim 3, characterized in that: According to the calibration value, the inlet and outlet water temperature difference is corrected in real time to obtain the calibration water temperature difference: ΔT=(T out -T in )-(T out-0 -T in-0 ) Where ΔT is the calibration water temperature difference.

5. The energy monitoring method according to claim 4, characterized in that: The heating or cooling capacity of the heat pump is calculated based on the water flow data and the calibrated water temperature difference; when the heat pump is in the heating state, the calculated heating capacity is: Q C =1.163L·ΔT=1.163L[(T out -T in )-(T out-0 -T in-0 )] Among them, Q C is the heating capacity, L is the water flow rate, ΔT is the calibration water temperature difference, T in is the inlet water temperature, T out is the outlet water temperature, T in-0 is the initial water inlet temperature, T out-0 is the initial outlet water temperature; When the heat pump is in cooling state, the processor calculates the cooling capacity as: Q E =1.163L·ΔT=1.163L[(T in -T out )-(T in-0 -T out-0 )] Among them, Q E For the cooling capacity.

6. An energy monitoring device, characterized in that: It includes an inlet water temperature sensor, an outlet water temperature sensor, a flow sensor and a processor. The inlet water temperature sensor detects the temperature of the inlet water of the heat pump, the outlet water temperature sensor detects the temperature of the outlet water of the heat pump, and the flow sensor detects the size of the water flow in the heat pump. The processor corrects the data from the inlet water temperature sensor and the outlet water temperature sensor according to a calibration value, and calculates the heating or cooling capacity of the heat pump in combination with the data from the flow sensor.

7. The energy monitoring device according to claim 6, characterized in that: Before the heat pump starts heating or cooling, the water in the heat pump starts to flow until the temperature data detected by the inlet water temperature sensor and the outlet water temperature sensor remain stable. Then, the data of the inlet water temperature sensor within a certain period of time are obtained and the average is calculated to obtain the initial inlet water temperature T. in-0 At the same time, the data of the water outlet temperature sensor during this period are obtained and the average is calculated to obtain the initial water outlet temperature T out-0 , subtract the initial water outlet temperature from the initial water inlet temperature to obtain the calibration value.

8. The energy monitoring device according to claim 7, characterized in that: The processor includes a temperature difference calculation module for receiving the inlet water temperature T from the inlet water temperature sensor in real time. in Data and the outlet water temperature T from the outlet water temperature sensor out Data, and use the outlet water temperature T out Subtract the inlet water temperature T in Get the inlet and outlet water temperature difference.

9. The energy monitoring device according to claim 8, characterized in that: The processor also includes a calibration module for correcting the inlet and outlet water temperature difference in real time according to the calibration value to obtain a calibrated water temperature difference: ΔT=(T out -T in )-(T out-0 -T in-0 ) Where ΔT is the calibration water temperature difference.

10. The energy monitoring device according to claim 9, characterized in that: The processor further includes a comprehensive calculation module for calculating the heating or cooling capacity of the heat pump according to the water flow data and the calibrated water temperature difference; when the heat pump is in the heating state, the calculated heating capacity is: Q C =1.163L·ΔT=1.163L[(T out -T in )-(T out-0 -T in-0 )] Among them, Q C is the heating capacity, L is the water flow rate, ΔT is the calibration water temperature difference, T in is the inlet water temperature, T out is the outlet water temperature, T in-0 is the initial water inlet temperature, T out-0 is the initial outlet water temperature; When the heat pump is in cooling state, the processor calculates the cooling capacity as: Q E =1.163L·ΔT=1.163L[(T in -T out )-(T in-0 -T out-0 )] Among them, Q E For the cooling capacity.

11. A heat pump system, characterized in that: It comprises a heat pump and an energy monitoring device as described in any one of claims 6 to 10, wherein the heat pump comprises an inlet pipe and an outlet pipe; the inlet temperature sensor is arranged at the inlet pipe to monitor the temperature of water in the inlet pipe; the outlet temperature sensor is arranged at the outlet pipe to monitor the temperature of water in the outlet pipe; the flow sensor is arranged at the inlet pipe or the outlet pipe to monitor the water flow in the heat pump; the processor is connected to the inlet temperature sensor, the outlet temperature sensor and the flow sensor, corrects the data from the inlet temperature sensor and the outlet temperature sensor according to a calibration value, and calculates the heating capacity or cooling capacity of the heat pump in combination with the data from the flow sensor.

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