Water supply system and control method of water supply system

Abstract

The invention discloses a water supply system and a control method of the water supply system, and belongs to the field of heat pump systems. The water supply system comprises a heat pump loop, a water storage device, a first pump and a controller. The heat pump loop comprises a compressor, a first path of a condenser and an evaporator assembly; the water storage device is connected to a second path of the condenser through the first pump, the water storage device is suitable for being connected with a water source and a water supply outlet, a flow regulating valve is arranged between the water storage device and the water source, and a second pump is arranged between the water storage device and the water supply outlet; the controller is connected with the first pump, the second pump, the evaporator assembly, the compressor and the flow adjusting valve, and the controller is configured to control the flow adjusting valve to be communicated and control the first pump to work under the condition that the second pump is started. The total water supply time of the water supply system is prolonged, the multi-purpose and long-time hot water use requirement is met, and the user experience is enhanced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of heat pump systems, and particularly relates to a water supply system and a control method of the water supply system. BACKGROUND

[0002] In the related art, a hot water supply system such as a heat pump water heater generally comprises a compressor, a condenser, an expansion valve, an evaporator, a circulating water pump, and a water storage device, and a user can adjust the water outlet temperature of the water storage device by adjusting a distribution valve when using water. With the improvement of living standards, the use scenarios of hot water increase, and the hot water supply of the water supply system is difficult to meet the long-time large demand of multi-people and multi-purpose water supply. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a water supply system and a control method of the water supply system, which prolongs the total water supply time of the water supply system, meets the long-time multi-purpose hot water demand, and enhances the user experience.

[0004] In a first aspect, the present application provides a water supply system, comprising:

[0005] a heat pump circuit comprising a compressor, a first path of a condenser, and an evaporator assembly;

[0006] a water storage device and a first pump, the water storage device being connected to a second path of the condenser through the first pump, and the water storage device being adapted to be connected to a water source and a water supply outlet, a flow regulating valve being arranged between the water storage device and the water source, and a second pump being arranged between the water storage device and the water supply outlet;

[0007] a controller connected to the first pump, the second pump, the evaporator assembly, the compressor, and the flow regulating valve, respectively, the controller being configured to control the flow regulating valve to be connected and control the first pump to work when the second pump is turned on.

[0008] According to the water supply system of the present application, when the water supply system supplies hot water to the user, the controller controls the flow regulating valve to be opened and controls the first pump to work, which can simultaneously realize the water supply, water inlet, and heating of the water storage device, so that the hot water supply time of the water supply system is not limited to the volume of the water storage device, the total water supply time of the water supply system is prolonged, the long-time multi-purpose hot water demand is met, and the user experience is enhanced.

[0009] According to one embodiment of the present application, the water supply system comprises a first temperature meter for detecting the water temperature of the water inlet of the water storage device; the water supply system further comprises a first flow meter and a second flow meter, the first flow meter is arranged between the water storage device and the first pump for detecting the outlet flow of the first pump, and the second flow meter is used for detecting the water supply flow of the water source to the water storage device; the controller is connected with the first flow meter, the second flow meter and the first temperature meter respectively; the controller is further configured to:

[0010] determining the target flow required for the heat pump circuit to heat the water temperature of the water inlet to the target water temperature of the water storage device based on the water temperature of the water inlet detected by the first temperature meter, the target water temperature of the water storage device and the rated power of the heat pump circuit;

[0011] adjusting the opening degree of the flow regulating valve based on the target flow and the detection result of the first flow meter;

[0012] adjusting the rotating speed of the first pump based on the target flow and the detection result of the second flow meter.

[0013] According to one embodiment of the present application, the water supply system further comprises a second temperature meter and a heater, the second temperature meter is used for detecting the ambient temperature, the heater, the first pump and the water storage device form a heating circuit, and the heater and the second temperature meter are connected with the controller; the controller is further configured to:

[0014] in the case that the ambient temperature detected by the second temperature meter is greater than or equal to the first target temperature threshold, determining the target flow required for the heat pump circuit to heat the water temperature of the water inlet to the target water temperature based on the water temperature of the water inlet detected by the first temperature meter, the target water temperature of the water storage device and the rated power of the heat pump circuit;

[0015] in the case that the second target temperature threshold is less than the ambient temperature detected by the second temperature meter and greater than the first target temperature threshold, determining the target flow required for the heat pump circuit and the heating circuit to heat the water temperature of the water inlet to the target water temperature based on the water temperature of the water inlet detected by the first temperature meter, the target water temperature of the water storage device, the rated power of the heating circuit and the rated power of the heat pump circuit;

[0016] in the case that the ambient temperature detected by the second temperature meter is less than the second target temperature threshold, determining the target flow required for the heating circuit to heat the water temperature of the water inlet to the target water temperature based on the water temperature of the water inlet detected by the first temperature meter, the target water temperature of the water storage device and the rated power of the heating circuit.

[0017] According to one embodiment of the present application, the controller is further configured to:

[0018] determining a difference between the inlet water temperature and the target water temperature;

[0019] determining a target flow rate required for the heating circuit to heat the inlet water temperature to the target water temperature based on the difference between the inlet water temperature and the target water temperature and a rated power of the heat pump circuit.

[0020] According to an embodiment of the present application, the heat pump circuit further comprises a liquid accumulator and an expansion valve; the water supply system further comprises a second temperature meter configured to detect an ambient temperature; the second temperature meter, the liquid accumulator and the expansion valve are connected to the controller;

[0021] the controller is further configured to, when the ambient temperature detected by the second temperature meter is greater than or equal to a first target temperature threshold and the second pump is turned on, control the compressor, the expansion valve, the evaporator assembly and the first pump to work, and control the flow regulating valve to be connected.

[0022] According to an embodiment of the present application, the heat pump circuit further comprises a liquid accumulator and an expansion valve; the water supply system further comprises a second temperature meter configured to detect an ambient temperature; the second temperature meter, the liquid accumulator and the expansion valve are connected to the controller; the controller is further configured to:

[0023] when the ambient temperature detected by the second temperature meter is greater than or equal to a first target temperature threshold and the second pump is turned off, control the compressor, the expansion valve, the first pump and the evaporator assembly to work, and control the flow regulating valve to be closed.

[0024] According to an embodiment of the present application, the water supply system further comprises a second temperature meter and a heater, the second temperature meter is configured to detect an ambient temperature, and the heater is connected to the water storage device; the heater and the second temperature meter are connected to the controller; the controller is further configured to:

[0025] when the ambient temperature detected by the second temperature meter is less than a second target temperature threshold and the second pump is turned on, control the heater and the first pump to work, and control the flow regulating valve to be connected.

[0026] According to an embodiment of the present application, the water supply system further comprises a second temperature meter and a heater, the second temperature meter is configured to detect an ambient temperature, and the heater is connected to the water storage device; the heater and the second temperature meter are connected to the controller; the controller is further configured to:

[0027] When the ambient temperature detected by the second thermometer is less than a second target temperature threshold and the second pump is turned off, the heater and the first pump are controlled to operate, and the flow regulating valve is controlled to be closed.

[0028] According to one embodiment of the present application, the controller is further configured to: control the flow regulating valve to open when the second pump and the first pump are turned off.

[0029] In a second aspect, the present application provides a control method for a water supply system based on any one of the above embodiments, characterized by comprising:

[0030] obtaining a working status of the second pump;

[0031] When the second pump is turned on, the flow regulating valve is controlled to be connected and to operate with the first pump.

[0032] According to the control method of the water supply system of the present application, when the water supply system supplies hot water to users, the flow regulating valve is controlled to open by the controller, and the first pump is controlled to work, so that water supply, water intake and heating of the water storage device can be realized at the same time, so that the hot water supply time of the water supply system is not limited to the volume of the water storage device, and the total water supply time of the water supply system is extended, meeting the multi-purpose and long-term hot water needs, and enhancing the user experience.

[0033] According to one embodiment of the present application, when the second pump is turned on, controlling the flow regulating valve to be connected and controlling the operation of the first pump includes:

[0034] Obtaining the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device, and the calibrated power of the heat pump circuit;

[0035] determining a target flow rate required by the heat pump circuit to heat the inlet water to the target water temperature based on the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device, and the calibrated power of the heat pump circuit;

[0036] adjusting the opening of the flow regulating valve based on the target flow and the detection result of the first flow meter;

[0037] The rotation speed of the first pump is adjusted based on the target flow rate and the detection result of the second flow meter.

[0038] According to one embodiment of the present application, the control method of the water supply system further includes:

[0039] Obtaining the ambient temperature detected by the second thermometer and the second target temperature threshold;

[0040] In the case that the ambient temperature ≥ the second target temperature threshold value and the second pump is opened, the compressor, the expansion valve, the evaporator assembly and the first pump of the water supply system are controlled to work, and the flow regulating valve is controlled to be connected.

[0041] According to an embodiment provided by the present application, the control method of the water supply system further comprises:

[0042] obtaining the ambient temperature detected by the second thermometer and the second target temperature threshold value;

[0043] In the case that the ambient temperature < the second target temperature threshold value and the second pump is closed, the heater and the first pump are controlled to work, and the flow regulating valve is controlled to be closed.

[0044] In a third aspect, the present application provides an electronic device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method of the water supply system according to any one of the preceding aspects when executing the program.

[0045] In a fourth aspect, the present application provides a non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program is executable by a processor to implement the control method of the water supply system according to any one of the preceding aspects.

[0046] In a fifth aspect, the present application provides a computer program product comprising a computer program, wherein the computer program is executable by a processor to implement the control method of the water supply system according to any one of the preceding aspects.

[0047] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0048] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0049] Figure 1 is one of the structural schematic diagrams of the water supply system provided by the embodiments of the present application;

[0050] Figure 2 is one of the flow schematic diagrams of the control method of the water supply system provided by the embodiments of the present application;

[0051] Figure 3 is another of the flow schematic diagrams of the control method of the water supply system provided by the embodiments of the present application;

[0052] Figure 4 is a third of the flow schematic diagrams of the control method of the water supply system provided by the embodiments of the present application;

[0053] Figure 5 Figure 4 is a flowchart of a control method of a water supply system according to an embodiment of the present application.

[0054] Reference Signs:

[0055] Heat pump circuit 1, compressor 11, condenser 12, first path 121 of the condenser, second path 122 of the condenser, evaporator assembly 13, evaporator 131, fan 132, liquid accumulator 14, expansion valve 15

[0056] Water storage device 21, first pump 22, water source 23, water supply outlet 24, flow regulating valve 25, second pump 26, first flow meter 27, second flow meter 28, first temperature meter 29, second temperature meter 30, third temperature meter 31, heater 32, first temperature-pressure detector 33, second temperature-pressure detector 34. DETAILED DESCRIPTION

[0057] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as a limitation of the present application.

[0058] The embodiments of the present application are described below by referring to the drawings. Figures 1-5 A water supply system and a control method of the water supply system according to an embodiment of the present application are described below.

[0059] As shown in Figure 1 Fig. 1, the water supply system according to an embodiment of the present application comprises a heat pump circuit 1, a water storage device 21, a first pump 22 and a controller.

[0060] The heat pump circuit 1 comprises a compressor 11, a first path 121 of a condenser and an evaporator assembly 13.

[0061] The water storage device 21 and the first pump 22, the water storage device 21 is connected to the second path 122 of the condenser through the first pump 22, and the water storage device 21 is adapted to be connected to a water source 23 and a water supply outlet 24, a flow regulating valve 25 is arranged between the water storage device 21 and the water source 23, and a second pump 26 is arranged between the water storage device 21 and the water supply outlet 24.

[0062] The controller is connected to the first pump 22, the second pump 26, the evaporator assembly 13, the compressor 11 and the flow regulating valve 25 respectively, and the controller is configured to control the flow regulating valve 25 to be communicated and control the first pump 22 to work when the second pump 26 is turned on.

[0063] The controller may be connected to the first pump 22 , the second pump 26 , the evaporator assembly 13 , the compressor 11 and the flow regulating valve 25 in a wired or wireless manner.

[0064] The evaporator assembly 13 includes an evaporator 131 and a fan 132 . The fan 132 may face the evaporator 131 , and the fan 132 is used to increase the evaporation rate of the evaporator 131 .

[0065] The water storage device 21 , the second path 122 of the condenser and the first pump 22 are connected in sequence to form a heating circuit. The first pump 22 is used to drive the water circulation of the heating circuit to heat the water circulation in the water storage device 21 .

[0066] The heating methods of the water storage device 21 include at least the following three methods:

[0067] First, when the ambient temperature is ≥ the first target temperature threshold, it indicates that the ambient temperature is relatively suitable and the ambient temperature meets the first operating temperature range of the heat pump circuit 1. Within the first operating temperature range, the heat pump circuit 1 is energy-saving and has high heating efficiency. The first path 121 of the condenser of the heat pump circuit 1 is used to heat the second path 122 of the condenser. The water in the water storage device 21 can be heated by heat pump heating so that the water stored in the water storage device 21 reaches the target temperature.

[0068] Among them, the first target temperature threshold T1 satisfies: -5℃≤T1≤5℃. Exemplarily, the second target temperature threshold T1 can be -5℃, 0℃ or 5℃, that is, when the ambient temperature is ≥-5℃, the water in the water storage device 21 is heated by heat pump heating.

[0069] Second, if Figure 1 As shown, the water supply system further includes a second thermometer 30 and a heater 32. The second thermometer 30 is used to detect the ambient temperature. The heater 32 is connected to the water storage device 21. Both the heater 32 and the second thermometer 30 are connected to the controller.

[0070] The water storage device 21, the second path 122 of the condenser, the heater 32 and the first pump 22 are connected in sequence to form a heating circuit.

[0071] When the ambient temperature is less than the second target temperature threshold, it indicates that the ambient temperature exceeds the suitable operating temperature range of the heat pump circuit 1. The heater 32 can be used to auxiliaryly heat the stored water in the water storage device 21 so that the water storage device 21 reaches the target temperature. The heat pump circuit 1 does not work, and the water supply system can simultaneously supply hot water, heat and store water.

[0072] In the embodiment, the ambient temperature is less than the second target temperature threshold, the ambient temperature is out of the suitable working temperature range of the heat pump circuit 1, the relative efficiency of the heat pump is low, and as the temperature decreases, the evaporator 131 is prone to ice blocking because the evaporation temperature of the refrigerant is below zero. At this time, the heat pump cycle cannot be a good heating source, and the heater 32 is used to assist heating to adapt to low-temperature working conditions, increase the use scenarios of the water supply system, meet the hot water supply demand, and increase the use temperature boundary of the product.

[0073] In the embodiment, the second target temperature threshold T2 satisfies T2<-5℃, and the second target temperature threshold T2 can be-6℃, -10℃, or-15℃, for example. In the case of the ambient temperature being less than-5℃, the heater is used to assist heating to heat the water in the water storage device 21.

[0074] Thirdly, in the case of the second target temperature threshold being less than the ambient temperature detected by the second thermometer and less than the first target temperature threshold, it is indicated that the ambient temperature is low, and the ambient temperature satisfies the second working temperature range of the heat pump circuit 1. In the second working temperature range, the heating efficiency of the heat pump circuit 1 is high but the energy consumption is large. The heater 32 and the heat pump circuit 1 are used to coordinate heating to heat the stored water of the water storage device 21, so that the water storage device 21 reaches the target temperature, and the water supply system supplies hot water, heating, and water storage at the same time, while reducing the energy consumption of the heat pump circuit 1 in the second working temperature range.

[0075] For example, the heater 32 can be an electric heater or a gas heater.

[0076] In the embodiment, the second pump 26 is turned on, indicating that the water supply system is providing hot water. For example, the case where the water supply system provides hot water includes the user taking a bath or washing clothes daily.

[0077] In the embodiment, the controller controls the flow regulating valve 25 to be connected, indicating that the controller controls the water storage device 21 to be connected to the water source 23, the water source 23 supplies water to the water storage device 21, and the water storage device 21 stores water.

[0078] For example, the water source 23 can be a municipal water source or a water supply device such as a water tank.

[0079] In the embodiment, the controller controls the first pump 22 to work, indicating that the first pump 22 drives the water in the water storage device 21 to circulate in the heating circuit, and the heat pump circuit 1 or the heater 32 circulates to heat the water storage device 21.

[0080] In the embodiment, when the water supply system supplies water to the user, the water source 23 supplies water to the water storage device 21, and the first pump 22 is turned on to drive the water in the water storage device 21 to circulate, so as to continuously supply hot water to the water storage device 21 during use, thereby increasing the amount of hot water supplied to the user.

[0081] In the related art, the control logic of the water supply system of a household heat pump is: water is stored during idle time (when the user does not use water), and the water storage device 21 is circulated and heated to control the water temperature at the target temperature; when the user uses water, the heating function of the water supply system is turned off, and the volume of hot water in the water storage device 21 is the user's maximum water consumption. The water temperature remains unchanged, and the user can adjust the distribution valve to use it at this time.

[0082] Due to household reasons, the power of water supply systems such as heat pump water heaters is usually small, generally 3 to 5kW. The water storage capacity of a normal household heat pump water heater is 150L-180L. In order to ensure the safety of heated water, the heating water temperature of the water storage device is generally set to a maximum of 65°C. Based on the normal household bathing water consumption of 10L / min, the normal bathing water temperature is around 40°C, and the city water temperature of the water diversion valve is 25°C. The water in a full water storage device can only be used for 40 minutes; and, in order to ensure good performance and power consumption, the heating water temperature of water supply systems such as general household heat pump water heaters is generally set to 55°C. Under this condition, the water in a full water storage device can be used for a shorter time, which is difficult to meet the hot water needs of a family of four.

[0083] According to the water supply system provided in the embodiment of the present application, when the water supply system supplies hot water to the user, the flow regulating valve 25 is controlled to open by the controller, and the first pump 22 is controlled to work, so that the water supply system can supply hot water, heat and store water at the same time, so that the hot water supply time of the water supply system is not limited to the volume of the water storage device 21, thereby extending the total water supply time of the water supply system, meeting the multi-purpose and long-term hot water needs, and enhancing the user experience.

[0084] Among them, the water storage device 21 can be a device such as the water storage device 21. The water storage device 21 is provided with a first port, a second port, a third port and a fourth port. The first port is connected to the water source 23, and the second port is connected to the water supply outlet 24. The third port of the water storage device 21, the first pump 22, the fourth port of the water storage device 21 and the second path 122 of the condenser are connected in sequence to form a heating circuit.

[0085] The controller can adjust the flow rate of water supplied from the water source 23 to the water storage device 21 by controlling the opening of the flow regulating valve 25 , and can stop the water source 23 from supplying water to the water storage device 21 by controlling the flow regulating valve 25 to be closed.

[0086] The controller controls the rotation speed of the first pump 22 to adjust the circulation flow of the heating circuit, and the controller controls the first pump 22 to be turned off to stop the circulation of the heating circuit.

[0087] The controller controls the second pump 26 to adjust the water flow rate from the water storage device 21 to the water supply outlet 24 , and the controller controls the second pump 26 to stop supplying water to the water storage device 21 .

[0088] In some embodiments, as Figure 1 As shown, the water supply system includes a first thermometer 29. Exemplarily, the first thermometer 29 can be arranged between the water storage device 21 and the water source 23, or the first thermometer 29 can be arranged at the water inlet of the water storage device 21. The first thermometer 29 is used to detect the inlet water temperature of the water supplied by the water source 23 to the water storage device 21, that is, the first thermometer 29 is used to detect the inlet water temperature of the water supplied by the water source 23 to the water storage device 21.

[0089] The water supply system also includes a first flow meter 27 and a second flow meter 28. The first flow meter 27 is arranged between the water storage device 21 and the first pump 22, and is used to detect the outlet flow of the first pump 22; the second flow meter 28 is used to detect the water supply flow from the water source 23 to the water storage device 21; the controller is respectively connected to the first flow meter 27, the second flow meter 28 and the first thermometer 29.

[0090] The controller is further configured to determine the target flow rate required for the heat pump circuit 1 to heat the inlet water to the target water temperature based on the inlet water temperature detected by the first thermometer 29 , the target water temperature of the water storage device 21 and the calibrated power of the heat pump circuit 1 .

[0091] The target water temperature of the water storage device 21 is a user-defined set value, and the rated power of the heat pump circuit 1 is the product of the voltage and current on the heat pump circuit.

[0092] The target water temperature T3 satisfies: 50°C≤T3≤65°C. For example, the target water temperature T3 may be 50°C, 55°C, 60°C, or 65°C.

[0093] The controller is further configured to adjust the opening of the flow control valve 25 based on the target flow and the detection result of the first flow meter 27 ; and adjust the rotation speed of the first pump 22 based on the target flow and the detection result of the second flow meter 28 .

[0094] In this step, the controller opens the flow regulating valve 25 and adjusts the opening of the flow regulating valve 25 based on the target flow, and uses the second flow meter 28 as feedback regression to make the water inlet flow of the water storage device 21 (the water supply flow of the water source 23) reach the target flow.

[0095] The controller adjusts the rotation speed of the first pump 22 and uses the first flow meter 27 to read the actual system circulation flow value for feedback adjustment to make the circulation flow reach the target flow, thereby maintaining the water temperature in the water storage device 21 unchanged, and continuously supplying hot water to the water storage device 21 while the water storage device 21 supplies hot water to the user, thereby increasing the amount of hot water supplied to the user and extending the hot water supply time.

[0096] In some embodiments, as Figure 1As shown, the water supply system further comprises a second thermometer 30 for detecting the ambient temperature and a heater 32 connected to the water storage device 21, the heater 32, the first pump and the water storage device 21 form a heating circuit, and the heater 32 and the second thermometer 30 are connected to the controller.

[0097] The heat pump circuit 1 is a circuit in which the compressor 11 is located, and comprises the compressor 11, a first path 121 of the condenser, the liquid accumulator 14, the expansion valve 15, the second thermometer 30 and the evaporator assembly 13. The rated power of the heat pump circuit 1 is the power of each load on the heat pump circuit 1.

[0098] The heating circuit is a circuit in which the water storage device 21 and the heater 32 are located, and comprises the first pump 22, the water storage device 21, a second path 122 of the condenser, the heater 32 and the third thermometer 31. The rated power of the heating circuit is the power of each load on the heating circuit 1.

[0099] The controller is configured to, in the case that the second pump 26 is turned on, control the flow regulating valve 25 to be turned on and control the heater 32 and / or the compressor 11 to work based on the detection result of the second thermometer 30.

[0100] The controller is further configured to, in the case that the ambient temperature is less than the second target temperature threshold, determine a target flow required for the heating circuit to heat the water temperature of the incoming water to the target water temperature based on the water temperature of the incoming water detected by the first thermometer 29, the target water temperature of the water storage device 21 and the rated power of the heating circuit.

[0101] The rated power of the heating circuit is the product of the voltage and the current on the heating circuit.

[0102] In this step, the ambient temperature is less than the second target temperature threshold, indicating that the ambient temperature is out of the suitable working temperature range of the heat pump circuit 1, and the water in the water storage device 21 can be heated to the target temperature by using the heater 32 to assist heating, and the heat pump circuit 1 does not work, and the water supply system supplies hot water, heating and water storage at the same time.

[0103] In this embodiment, the ambient temperature is less than the second target temperature threshold, the ambient temperature is out of the suitable working temperature range of the heat pump circuit 1, the relative efficiency of the heat pump is low, and as the temperature decreases, the evaporator 131 is prone to ice blocking because the evaporation temperature of the refrigerant is below zero, at this time the heat pump cycle cannot be a good heating source, and the use of the heater 32 to assist heating can adapt to low temperature working conditions, increase the use scenarios of the water supply system, and meet the hot water supply demand.

[0104] The second target temperature threshold T2 satisfies: T2 < -5°C. For example, the second target temperature threshold T2 can be -6°C, -10°C or -15°C. In the case of the ambient temperature < -5°C, the water in the water storage device 21 can be heated by the heater in an auxiliary heating mode.

[0105] The controller is further configured to, in the case of the ambient temperature ≥ the first target temperature threshold, determine a target flow rate required by the heat pump circuit 1 to heat the water temperature of the incoming water to the target water temperature based on the water temperature of the incoming water detected by the first thermometer 29, the target water temperature of the water storage device 21 and the rated power of the heat pump circuit 1.

[0106] In this step, the ambient temperature ≥ the first target temperature threshold, indicating that the ambient temperature is suitable, and the ambient temperature satisfies the first working temperature range of the heat pump circuit 1. In the first working temperature range, the heat pump circuit 1 is energy-saving and has high heating efficiency. The first path 121 of the condenser of the heat pump circuit 1 is used to heat the second path 122 of the condenser. The water in the water storage device 21 can be heated by the heat pump in a heating mode to reach the target temperature.

[0107] The first target temperature threshold T1 satisfies: -5°C ≤ T1 ≤ 5°C. For example, the second target temperature threshold T1 can be -5°C, 0°C or 5°C. In the case of the ambient temperature ≥ -5°C, the water in the water storage device 21 is heated by the heat pump in a heating mode.

[0108] The controller is further configured to, in the case of the second target temperature threshold ≤ the ambient temperature < the first target temperature threshold, determine a target flow rate required by the heat pump circuit and the heating circuit to heat the water temperature of the incoming water to the target water temperature based on the water temperature of the incoming water detected by the first thermometer, the target water temperature of the water storage device, the rated power of the heating circuit and the rated power of the heat pump circuit.

[0109] In this step, the second target temperature threshold ≤ the ambient temperature < the first target temperature threshold, indicating that the ambient temperature is low, and the ambient temperature satisfies the second working temperature range of the heat pump circuit 1. In the second working temperature range, the heat pump circuit 1 has high heating efficiency but high energy consumption. The stored water in the water storage device 21 can be heated by the heater 32 and the heat pump in a coordinated heating mode to reach the target temperature, so as to realize the supply of hot water, heating and water storage of the water supply system, and reduce the energy consumption of the heat pump circuit 1.

[0110] In some embodiments, the controller is further configured to: subtract the water temperature of the incoming water from the target water temperature; and determine a target flow rate required by the heating circuit to heat the water temperature of the incoming water to the target water temperature based on the difference between the water temperature of the incoming water and the target water temperature and the rated power of the heat pump circuit 1.

[0111] In this step, after the controller obtains the detected inlet water temperature of the first thermometer 29, the controller calculates the difference between the inlet water temperature and the target water temperature, and then, in combination with the rated power of the heat pump circuit 1 or the heating circuit, the target flow rate that can heat the current inlet water temperature to the target water temperature can be obtained.

[0112] In some embodiments, as shown in Figure 1 The heat pump circuit 1 further includes a liquid accumulator 14 and an expansion valve 15; and the water supply system further includes a second thermometer 30 configured to detect an ambient temperature; the second thermometer 30, the liquid accumulator 14, and the expansion valve 15 are all connected to the controller.

[0113] The compressor 11, the first path 121 of the condenser, the liquid accumulator 14, the expansion valve 15, and the evaporator assembly 13 are sequentially connected in series to form the heat pump circuit 1. By providing the liquid accumulator 14, the heat exchange medium flowing out of the first path 121 of the condenser can be collected and subjected to gas-liquid separation, so as to reduce the proportion of liquid entering the evaporator 131 and improve the heat exchange effect.

[0114] The controller is further configured to, in a case where the ambient temperature detected by the second thermometer 30 is greater than or equal to the first target temperature threshold and the second pump 26 is turned on, control the compressor 11, the expansion valve 15, the evaporator assembly 13, and the first pump 22 to work, and control the flow regulating valve 25 to be connected.

[0115] The water supply system has a normal-temperature water supply mode: in a case where the ambient temperature meets the working temperature of the heat pump circuit 1 and the water supply system is in a hot water supply state, the controller controls the components on the heat pump circuit 1 to work, so that the first path 121 of the condenser supplies heat to the second path 122 of the condenser; meanwhile, the controller controls the first pump 22 to work, so that the second path 122 of the condenser circulates and heats the water in the water storage device 21; meanwhile, the controller controls the flow regulating valve 25 to be turned on, so that the water source 23 supplies water to the water storage device 21; in summary, the normal-temperature water supply mode can simultaneously realize the hot water supply, heating, and water storage of the water supply system, prolongs the total water supply time of the water supply system, meets the multi-purpose and long-time hot water supply demand, and enhances the user experience.

[0116] In some embodiments, as shown in Figure 1 The heat pump circuit 1 further includes a liquid accumulator 14 and an expansion valve 15; and the water supply system further includes a second thermometer 30 configured to detect an ambient temperature; the second thermometer 30, the liquid accumulator 14, and the expansion valve 15 are all connected to the controller.

[0117] The controller is further configured to, in a case where the ambient temperature detected by the second thermometer 30 is greater than or equal to the first target temperature threshold and the second pump 26 is turned off, control the compressor 11, the expansion valve 15, the first pump 22, and the evaporator assembly 13 to work, and control the flow regulating valve 25 to be turned off.

[0118] The water supply system has a heat pump heating mode: in the case that the ambient temperature meets the working temperature of the heat pump circuit 1 and the water supply system is in idle time, the controller controls each component on the heat pump circuit 1 to work, so that the first path 121 of the condenser supplies heat to the second path 122 of the condenser; at the same time, the controller controls the first pump 22 to work, so that the second path 122 of the condenser circulates and heats the water in the water storage device 21; in summary, the heat pump heating mode can realize heating of the water in the water storage device 21 by the heat pump.

[0119] In some embodiments, as shown in FIG. 1, the water supply system further comprises a second thermometer 30 for detecting the ambient temperature, and the second thermometer 30 is connected to the controller. Figure 1

[0120] In the case that the ambient temperature detected by the second thermometer 30 is less than the second target temperature threshold and the second pump 26 is turned on, the controller controls the heater 32 and the first pump 22 to work, and controls the flow regulating valve 25 to be connected.

[0121] The water supply system has a low-temperature water supply mode: in the case that the ambient temperature does not meet the working temperature of the heat pump circuit 1 and the water supply system is in the case of supplying hot water, the controller controls the heater 32 and the first pump 22 to work, so that the heater 32 circulates and heats the water in the water storage device 21; at the same time, the controller controls the flow regulating valve 25 to be turned on to supply water from the water source 23 to the water storage device 21; in summary, the normal-temperature water supply mode can realize simultaneous supply of hot water, heating and storage of the water supply system, prolong the total water supply time of the water supply system, meet the multi-purpose and long-time hot water demand under low-temperature conditions, and enhance the user experience.

[0122] In some embodiments, as shown in FIG. 1, the water supply system further comprises a second thermometer 30 for detecting the ambient temperature, and the second thermometer 30 is connected to the controller. Figure 1

[0123] The controller is further configured to, in the case that the ambient temperature detected by the second thermometer 30 is less than the second target temperature threshold and the second pump 26 is turned off, control the heater 32 and the first pump 22 to work, and control the flow regulating valve 25 to be turned off.

[0124] The water supply system has a low-temperature heating mode: in the case that the ambient temperature does not meet the working temperature of the heat pump circuit 1 and the water supply system is in idle time, the controller controls the heater 32 and the first pump 22 to work, so that the heater 32 circulates and heats the water in the water storage device 21; in summary, the low-temperature heating mode can realize heating of the water in the water storage device 21 by the heater 32.

[0125] In some embodiments, the controller is further configured to, in the case that the second pump 26 and the first pump 22 are turned off, control the flow regulating valve 25 to be turned on. ​​

[0126] The water supply system has a water storage mode, in which the controller only controls the flow regulating valve 25 to open to allow the water source 23 to supply water to the water storage device 21.

[0127] In some embodiments, the water supply system further comprises a third thermometer 31 arranged at the outlet of the heater 32 to detect the temperature of the water heated by the heater 32, and the third thermometer 31 is connected to the controller.

[0128] The controller controls the heating temperature and the heating duration of the heater 32 based on the detection result of the third thermometer 31.

[0129] According to the water supply system provided by the embodiments of the present application, the water in the water storage device 21 is heated at the same time when the user uses hot water, which can prolong the time of the water supply system supplying hot water, and at the same time, the temperature of the water remains unchanged in the user perception interface, reducing the frequency of the user adjusting the water distribution valve and improving the user experience.

[0130] In some embodiments, the water supply system further comprises a first temperature and pressure detector 33 and a second temperature and pressure detector 34, the first temperature and pressure detector 33 is used to detect the outlet temperature and pressure of the compressor 11, and the second temperature and pressure detector 34 is used to detect the inlet temperature and pressure of the compressor 11. The first temperature and pressure detector 33 and the second temperature and pressure detector 34 are respectively connected to the controller.

[0131] The controller controls the working state of the compressor 11 based on the detection results of the first temperature and pressure detector 33 and the second temperature and pressure detector 34.

[0132] In this step, the controller can monitor and adjust the working state of the compressor 11, reduce the risk of damage to the compressor 11, and improve the reliability and stability of the heat pump circuit 1.

[0133] As shown in Figure 2 The embodiments of the present application also provide a control method of the water supply system based on any of the above embodiments, which comprises steps 100 and 200.

[0134] Step 100: Obtain the working state of the second pump 26.

[0135] In this step, the opening of the second pump 26 indicates that the water supply system is supplying hot water to the user; the closing of the second pump 26 indicates that the water supply system is in an idle state.

[0136] Step 200: In the case that the second pump 26 is opened, control the flow regulating valve 25 to be connected, and control the first pump 22 to work.

[0137] In this step, when the water supply system is supplying hot water to the user, the controller controls the flow regulating valve 25 to connect the water source 23 to supply water to the water storage device 21; controls the first pump 22 to work to heat the water storage device 21, which can simultaneously realize the water supply, water inlet and heating of the water storage device 21, so that the hot water supply time of the water supply system is not limited to the volume of the water storage device 21, the total water supply time of the water supply system is prolonged, the multi-purpose and long-time hot water demand is met, and the user experience is enhanced.

[0138] According to the control method of the water supply system provided by the embodiment of the application, when the water supply system supplies hot water to the user, the controller controls the flow regulating valve 25 to open, and controls the first pump 22 to work, which can simultaneously realize the water supply, water inlet and heating of the water storage device 21, so that the hot water supply time of the water supply system is not limited to the volume of the water storage device 21, the total water supply time of the water supply system is prolonged, the multi-purpose and long-time hot water demand is met, and the user experience is enhanced.

[0139] As shown in Figure 3 In some embodiments, step 200, when the second pump 26 is opened, the flow regulating valve 25 is connected, and the first pump 22 is controlled to work, including steps 201, 202, 203 and 204.

[0140] Step 201, obtaining the inlet water temperature detected by the first temperature meter 29, the target water temperature of the water storage device 21 and the rated power of the heat pump circuit 1.

[0141] Among them, the target water temperature of the water storage device 21 is a set value defined by the user, the rated power of the heat pump circuit 1 is the product of the voltage and current on the heat pump circuit 1, and the inlet water temperature detected by the first temperature meter 29 is the inlet water temperature of the water source 23 to the water storage device 21.

[0142] Step 202, based on the inlet water temperature detected by the first temperature meter 29, the target water temperature of the water storage device 21 and the rated power of the heat pump circuit 1, determining the target flow required for the heat pump circuit 1 to heat the inlet water temperature to the target water temperature.

[0143] Step 203, based on the target flow and the detection result of the first flow meter 27, adjusting the opening degree of the flow regulating valve 25.

[0144] In this step, the controller opens the flow regulating valve 25 and adjusts the opening degree of the flow regulating valve 25 based on the target flow, so that the inlet flow of the water storage device 21 (the water supply flow of the water source 23) reaches the target flow by taking the second flow meter 28 as a feedback regression.

[0145] Step 204, based on the target flow and the detection result of the second flow meter 28, adjusting the rotating speed of the first pump 22.

[0146] In this step, the controller adjusts the rotation speed of the first pump 22 to read the actual system circulation flow value by the first flow meter 27 to make feedback adjustment, so that the circulation flow reaches the target flow, thereby maintaining the water temperature in the water storage device 21, continuously supplying hot water to the water storage device 21 in the case of supplying hot water to the user, thereby increasing the amount of hot water supplied to the user and prolonging the hot water supply time.

[0147] In some embodiments, based on the inlet water temperature detected by the first temperature meter 29, the target water temperature of the water storage device 21, and the rated power of the heat pump circuit 1, the target flow required for the heat pump circuit 1 to heat the inlet water temperature to the target water temperature is determined, comprising:

[0148] The difference between the inlet water temperature and the target water temperature is obtained.

[0149] Based on the difference between the inlet water temperature and the target water temperature and the rated power, the target flow required for the heating circuit to heat the inlet water temperature to the target water temperature is determined.

[0150] In some embodiments, the control method of the water supply system further comprises:

[0151] Obtaining the ambient temperature detected by the second temperature meter 30 and the first target temperature threshold.

[0152] In the case that the ambient temperature detected by the second temperature meter 30 is less than the first target temperature threshold, based on the inlet water temperature detected by the first temperature meter 29, the target water temperature of the water storage device 21, and the rated power of the heating circuit, the target flow required for the heat pump circuit 1 to heat the inlet water temperature to the target water temperature is determined.

[0153] In the case that the ambient temperature detected by the second temperature meter 30 is greater than or equal to the second target temperature threshold, based on the inlet water temperature detected by the first temperature meter 29, the target water temperature of the water storage device 21, and the rated power of the heat pump circuit 1, the target flow required for the heat pump circuit 1 to heat the inlet water temperature to the target water temperature is determined.

[0154] In the case that the second target temperature threshold is less than the ambient temperature detected by the second temperature meter and the first target temperature threshold, based on the inlet water temperature detected by the first temperature meter 29, the target water temperature of the water storage device 21, the rated power of the heating circuit, and the rated power of the heat pump circuit 1, the target flow required for the heat pump circuit 1 and the heating circuit to heat the inlet water temperature to the target water temperature is determined.

[0155] As shown in Figure 4 In some embodiments, the control method of the water supply system further comprises steps 301 and 302.

[0156] Step 301, obtaining the ambient temperature detected by the second temperature meter 30 and the first target temperature threshold.

[0157] The first target temperature threshold is a boundary point between the suitable first working temperature range and the suitable second working temperature range of the heat pump circuit 1.

[0158] The second target temperature threshold T2 satisfies T2<-5°C. For example, the second target temperature threshold T2 can be -6°C, -10°C or -15°C. In the case where the ambient temperature is less than -5°C, the water in the water storage device 21 can be heated by the heater.

[0159] In step 302, in the case where the ambient temperature is greater than or equal to the first target temperature threshold and the second pump 26 is turned on, the compressor 11, the expansion valve 15, the evaporator assembly 13 and the first pump 22 are controlled to work, and the flow regulating valve 25 is controlled to be connected.

[0160] In this step, the ambient temperature is greater than or equal to the first target temperature threshold, indicating that the ambient temperature is suitable, and the ambient temperature satisfies the suitable first working temperature range of the heat pump circuit 1. The first path 121 of the condenser is used to heat the second path 122 of the condenser, and the water in the water storage device 21 can be heated by the heat pump to reach the target temperature.

[0161] The water supply system has a normal-temperature water mode. In the case where the ambient temperature satisfies the working temperature of the heat pump circuit 1 and the water supply system is in the hot water supply state, the controller controls the components on the heat pump circuit 1 to work, so that the first path 121 of the condenser supplies heat to the second path 122 of the condenser. Meanwhile, the controller controls the first pump 22 to work, so that the second path 122 of the condenser circulates to heat the water in the water storage device 21. Meanwhile, the controller controls the flow regulating valve 25 to be opened, so that the water source 23 supplies water to the water storage device 21. In summary, the normal-temperature water mode can supply hot water, heat and store water at the same time, prolongs the total water supply time of the water supply system, meets the multi-purpose and long-time hot water demand, and enhances the user experience.

[0162] In some embodiments, the control method of the water supply system further includes:

[0163] In the case where the ambient temperature detected by the second temperature meter 30 is greater than or equal to the first target temperature threshold and the second pump 26 is turned off, the compressor 11, the expansion valve 15, the first pump 22 and the evaporator assembly 13 are controlled to work, and the flow regulating valve 25 is controlled to be closed.

[0164] The water supply system has a heat pump heating mode: in the case that the ambient temperature meets the working temperature of the heat pump circuit 1 and the water supply system is in an idle state, the controller controls each component on the heat pump circuit 1 to work, so that the first path 121 of the condenser supplies heat to the second path 122 of the condenser; at the same time, the controller controls the first pump 22 to work, so that the second path 122 of the condenser circulates and heats the water in the water storage device 21; in summary, the heat pump heating mode can realize heating of the water in the water storage device 21 by the heat pump.

[0165] As shown in FIG. 1, in some embodiments, the control method of the water supply system further includes steps 401 and 402. Figure 5

[0166] Step 401: obtaining the ambient temperature detected by the second thermometer 30 and the second target temperature threshold.

[0167] Step 402: in the case that the ambient temperature is less than the second target temperature threshold and the second pump 26 is closed, controlling the heater 32 and the first pump 22 to work, and controlling the flow regulating valve 25 to be closed.

[0168] In this step, the ambient temperature less than the second target temperature threshold indicates that the ambient temperature is low, and the ambient temperature is lower than the working temperature of the heat pump circuit 1. The water in the water storage device 21 can be heated by the heater 32 to reach the target temperature, and the water supply system can supply hot water, heating and water storage at the same time.

[0169] In this embodiment, the ambient temperature is less than the second target temperature threshold, and the ambient temperature is out of the working temperature range of the heat pump circuit 1. The relative efficiency of the heat pump is low, and as the temperature decreases, the evaporator 131 is prone to ice blocking because the evaporation temperature of the refrigerant is below zero. At this time, the heat pump cycle cannot be a good heating source. The use of the heater 32 for auxiliary heating can adapt to low-temperature working conditions, increase the use scenarios of the water supply system, and meet the hot water supply demand.

[0170] The water supply system has a low-temperature water supply mode: in the case that the ambient temperature does not meet the working temperature of the heat pump circuit 1 and the water supply system is in a hot water supply state, the controller controls the heater 32 and the first pump 22 to work, so that the heater 32 circulates and heats the water in the water storage device 21; at the same time, the flow regulating valve 25 is opened to supply water from the water source 23 to the water storage device 21; in summary, the normal-temperature water supply mode can realize hot water supply, heating and water storage of the water supply system at the same time, prolong the total water supply time of the water supply system, meet the multi-purpose and long-time hot water supply demand under low-temperature conditions, and enhance the user experience.

[0171] In some embodiments, the control method of the water supply system further includes:

[0172] ​When the ambient temperature detected by the second temperature meter 30 is less than the second target temperature threshold and the second pump 26 is off, the heater 32 and the first pump 22 are controlled to work, and the flow regulating valve 25 is controlled to be closed.

[0173] The water supply system has a low-temperature heating mode: when the ambient temperature does not meet the working temperature of the heat pump circuit 1 and the water supply system is in an idle state, the controller controls the heater 32 and the first pump 22 to work, so that the heater 32 circulates and heats the water in the water storage device 21; in summary, the low-temperature heating mode can realize heating of the water in the water storage device 21 by the heater 32.

[0174] In some embodiments, the control method of the water supply system further comprises:

[0175] When the second pump 26 and the first pump 22 are off, the flow regulating valve 25 is controlled to be opened.

[0176] The water supply system has a water storage mode, in which the controller only controls the flow regulating valve 25 to be opened to supply water from the water source 23 to the water storage device 21.

[0177] The control method of the water supply system of the present application is described below with reference to a specific embodiment.

[0178] As shown in Figure 1 The water supply system of the present application comprises a compressor 11, a condenser 12, a liquid accumulator 14, a fan 132, an expansion valve 15, an evaporator 131, a second flow meter 28, a first flow meter 27, a third temperature meter 31, a first temperature meter 29, a flow regulating valve 25, a water storage device 21, a water source 23, a user water supply outlet 24, a first pump 22, a second pump 26, a first temperature-pressure detector 33, a second temperature-pressure detector 34, a heater 32, and the like.

[0179] When the user does not use water, the flow regulating valve 25 is opened, and after the water storage device 21 is filled with water, the two-way stop valve is closed. The compressor 11 is normally started, the refrigerant flows through the condenser 12 to heat the first path, passes through the expansion valve 15 to throttle, flows through the evaporator 131 to exchange heat with air, and finally the refrigerant returns to the compressor 11. The first pump 22 is normally started to circulate and heat the water in the water storage device 21 to the target temperature, and stops heating after the water is heated to the target temperature.

[0180] When the user uses water, based on the water inlet temperature of the water supplied from the water source 23 to the water storage device 21 collected by the first temperature meter 29, the controller calculates the difference between the water inlet temperature and the target water temperature, and combines the rated power of the heat pump circuit to obtain a target flow rate that can heat the current water inlet temperature to the target water temperature. According to the target flow rate, the flow regulating valve 25 is opened and the opening degree of the flow regulating valve 25 is adjusted, and the second flow meter 28 is used as a feedback regression to make the current flow rate reach the current target flow rate.

[0181] The controller adjusts the rotation speed of the first pump 22, reads the actual system circulation flow of the heating circuit by the first flowmeter 27, adjusts the rotation speed of the first pump 22 according to the detection value of the first flowmeter 27, maintains the water temperature of the water storage device 21, and realizes continuous heating of the water storage device 21 in the process of supplying hot water to the user, thereby increasing the amount of hot water supplied to the user.

[0182] Meanwhile, in a low-temperature environment, the relative efficiency of the heat pump is low, and as the temperature decreases, the evaporator 131 is prone to ice blocking because the evaporation temperature of the refrigerant is below zero. At this time, the heat pump circuit 1 cannot be a good heat source, and the heater 32 is provided as a heat source for the water storage device 21 in a low-temperature condition.

[0183] In a low-temperature environment, when the user does not use water, the heater 32 is turned on to heat the water in the water storage device 21 to the target temperature.

[0184] When the user uses water, the controller automatically calculates the difference between the water temperature and the target water temperature based on the water temperature collected by the first temperature meter 29, combines the calibrated power of the heating circuit, obtains the water flow that can heat the current water temperature to the target water temperature, opens the flow regulating valve 25 and adjusts the opening degree of the stop valve according to the flow, and uses the water flowmeter 2 as a feedback regression to make the flow reach the current calculated value.

[0185] The controller adjusts the rotation speed of the first pump 22, calculates the difference between the water temperature and the target water temperature based on the water temperature collected by the first temperature meter 29, combines the calibrated power of the heating circuit, obtains the target flow that can heat the current water temperature to the target water temperature, opens the flow regulating valve 25 and adjusts the opening degree of the flow regulating valve 25 according to the target flow, and uses the second flowmeter 28 as a feedback regression to make the current flow reach the current target flow.

[0186] When the target user, the target area, and the installation environment of the water supply system are determined, since the city water supply conditions used are consistent, the third temperature meter 31, the first temperature meter 29, the second flowmeter 28, and the first flowmeter 27 can be cancelled, and the controller can use the calibrated data as a calibration quantity as a basis for adjusting the working state of the flow regulating valve 25 and the first pump 22.

[0187] The application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the control method of the water supply system of any one of the above.

[0188] The application further provides a non-transitory computer-readable storage medium, having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the control method of the water supply system according to any one of the preceding embodiments.

[0189] The application further provides a computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the control method of the water supply system according to any one of the preceding embodiments.

[0190] The terms "first", "second", and the like in the description and claims of the application are used for distinguishing between similar objects and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of such terms as "first", "second", and the like, in the description and claims of the application are used to distinguish between two distinct sets of objects that are described and claimed, not that they are to be construed as a serial order, or as indiciating a particular sequential or chronological order. It is to be understood that the data so described can be interchanged, under suitable circumstances, so that the embodiments of the present application could operate in other sequential or chronological orders than those illustrated and described herein without departing from the scope and spirit of the present application. Furthermore, it is to be understood that the objects "first", "second", and the like, are generally not limited to two objects unless specifically state otherwise, and that the objects "first", "second", and the like, can be one or more than one object.

[0191] In the description of the application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0192] In the description of the application, "first feature" and "second feature" can include one or more of the features.

[0193] In the description of the application, "a plurality of" means two or more.

[0194] In the description of the application, "above" or "below" the first feature in the second feature can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature therebetween.

[0195] In the description of the application, "above", "over", and "on" the first feature in the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher in level than the second feature.

[0196] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. It is emphasized that each of these terms refers to a specific feature, structure, material or characteristic described in connection with a particular embodiment or example. The descriptive terms are not necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0197] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application is defined with respect to the appended claims.

Claims

1. A water supply system, characterized in that: include: a heat pump circuit, including the compressor, the first leg of the condenser, and the evaporator assembly; A water storage device and a first pump, wherein the water storage device is connected to the second path of the condenser through the first pump, and the water storage device is adapted to be connected to a water source and a water supply outlet, a flow regulating valve is provided between the water storage device and the water source, and a second pump is provided between the water storage device and the water supply outlet; A controller is connected to the first pump, the second pump, the evaporator assembly, the compressor and the flow regulating valve respectively. The controller is configured to control the flow regulating valve to be connected and control the operation of the first pump when the second pump is turned on.

2. The water supply system according to claim 1, characterized in that The water supply system includes a first thermometer, which is used to detect the water temperature of the water inlet of the water storage device; the water supply system also includes a first flow meter and a second flow meter, the first flow meter is arranged between the water storage device and the first pump, and is used to detect the outlet flow of the first pump; the second flow meter is used to detect the water supply flow of the water source to the water storage device; the controller is connected to the first flow meter, the second flow meter and the first thermometer respectively; the controller is further configured to: determining a target flow rate required by the heat pump circuit to heat the inlet water to the target water temperature based on the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device, and the calibrated power of the heat pump circuit; adjusting the opening of the flow control valve based on the target flow and the detection result of the first flow meter; The rotation speed of the first pump is adjusted based on the target flow rate and the detection result of the second flow meter.

3. The water supply system according to claim 2, characterized in that The water supply system further includes a second thermometer and a heater. The second thermometer is used to detect the ambient temperature. The heater, the first pump, and the water storage device are connected to form a heating circuit. The heater and the second thermometer are both connected to the controller. The controller is further configured to: When the ambient temperature detected by the second thermometer is greater than or equal to a first target temperature threshold, determining a target flow rate required by the heat pump circuit to heat the inlet water to the target water temperature based on the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device, and the calibrated power of the heat pump circuit; When the second target temperature threshold is less than or equal to the ambient temperature detected by the second thermometer and less than the first target temperature threshold, determining target flow rates required for the heat pump circuit and the heating circuit to heat the inlet water to the target water temperature based on the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device, the rated power of the heating circuit, and the rated power of the heat pump circuit; When the ambient temperature detected by the second thermometer is less than the second target temperature threshold, the target flow rate required for the heating circuit to heat the inlet water temperature to the target water temperature is determined based on the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device and the calibrated power of the heating circuit.

4. The water supply system according to claim 3, characterized in that The controller is further configured to: subtracting the inlet water temperature from the target water temperature; A target flow rate required by the heating circuit to heat the inlet water to the target water temperature is determined based on the difference between the inlet water temperature and the target water temperature and the rated power of the heat pump circuit.

5. The water supply system according to any one of claims 1 to 4, characterized in that: The heat pump circuit further includes: a liquid reservoir and an expansion valve; the water supply system further includes a second thermometer, the second thermometer is used to detect the ambient temperature; the second thermometer, the liquid reservoir and the expansion valve are all connected to the controller; The controller is further configured to: when the ambient temperature detected by the second thermometer is ≥ the first target temperature threshold and the second pump is turned on, control the compressor, the expansion valve, the evaporator assembly and the first pump to operate, and control the flow regulating valve to be connected.

6. The water supply system according to any one of claims 1 to 4, characterized in that: The heat pump circuit further includes: a liquid reservoir and an expansion valve; the water supply system further includes a second thermometer, the second thermometer being used to detect the ambient temperature; the second thermometer, the liquid reservoir and the expansion valve are all connected to the controller; the controller is further configured to: When the ambient temperature detected by the second thermometer is greater than or equal to the first target temperature threshold and the second pump is turned off, the compressor, the expansion valve, the first pump and the evaporator assembly are controlled to operate, and the flow regulating valve is controlled to be closed.

7. The water supply system according to any one of claims 1 to 4, characterized in that: The water supply system further includes a second thermometer and a heater, wherein the second thermometer is used to detect the ambient temperature, the heater is connected to the water storage device, and both the heater and the second thermometer are connected to the controller; the controller is further configured to: When the ambient temperature detected by the second thermometer is less than a second target temperature threshold and the second pump is turned on, the heater and the first pump are controlled to operate, and the flow regulating valve is controlled to be connected.

8. The water supply system according to any one of claims 1 to 4, characterized in that: The water supply system further includes a second thermometer and a heater, wherein the second thermometer is used to detect the ambient temperature, the heater is connected to the water storage device, and both the heater and the second thermometer are connected to the controller; the controller is further configured to: When the ambient temperature detected by the second thermometer is less than a second target temperature threshold and the second pump is turned off, the heater and the first pump are controlled to operate, and the flow regulating valve is controlled to be closed.

9. The water supply system according to any one of claims 1 to 4, characterized in that: The controller is further configured to control the flow regulating valve to open when the second pump and the first pump are turned off.

10. A control method for a water supply system according to any one of claims 1 to 9, characterized in that: obtaining a working status of the second pump; When the second pump is turned on, the flow regulating valve is controlled to be connected and to operate with the first pump.

11. The water supply system control method according to claim 10, characterized in that: When the second pump is turned on, controlling the flow regulating valve to be connected and controlling the flow regulating valve to operate with the first pump includes: Obtaining the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device, and the calibrated power of the heat pump circuit; determining a target flow rate required by the heat pump circuit to heat the inlet water to the target water temperature based on the inlet water temperature detected by the first thermometer, the target water temperature of the water storage device, and the calibrated power of the heat pump circuit; adjusting the opening of the flow regulating valve based on the target flow and the detection result of the first flow meter; The rotation speed of the first pump is adjusted based on the target flow rate and the detection result of the second flow meter.

12. The water supply system control method according to claim 10, characterized in that: The control method of the water supply system further includes: Obtaining the ambient temperature detected by the second thermometer and the first target temperature threshold; When the ambient temperature is greater than or equal to the first target temperature threshold and the second pump is turned on, the compressor, expansion valve, evaporator assembly and first pump of the water supply system are controlled to operate, and the flow regulating valve is controlled to be connected.

13. The method for controlling a water supply system according to claim 10, wherein: The control method of the water supply system further includes: Obtaining the ambient temperature detected by the second thermometer and the second target temperature threshold; When the ambient temperature is less than the second target temperature threshold and the second pump is turned off, the heater and the first pump are controlled to operate, and the flow regulating valve is controlled to be closed.

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