Heat pump system

Abstract

The invention provides a heat pump system which comprises a first refrigerant-water heat exchanger used for providing domestic water; the second refrigerant-water heat exchanger is used for providing water for refrigeration or heating; a refrigerant-air heat exchanger; a processing device includes: a first prediction unit in which a hot water load prediction model is disposed to generate a predicted hot water load; a second prediction unit in which a refrigeration load prediction model is disposed to generate a predicted refrigeration load; a decision section configured to evaluate whether recoverable heat generated based on the predicted cooling load satisfies the predicted hot water load, generate a dynamic priority, select to execute a corresponding heat recovery water heating mode, so that the first refrigerant-water heat exchanger works as a condenser, and generate a second refrigerant-water heat exchanger; or the first refrigerant-water heat exchanger and the refrigerant-air heat exchanger work as condensers at the same time, and the second refrigerant-water heat exchanger works as an evaporator. The hot water / refrigeration demand is accurately predicted, and waste heat resources are efficiently recycled.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a heat pump system. Background Art

[0002] The heat pump system (taking the air source heat pump system as an example) uses the compressor to do work, driving the refrigerant (coolant) to circulate in the evaporator, compressor, condenser and throttling element; in cooling mode, the indoor heat exchanger acts as an evaporator to absorb heat, and the outdoor heat exchanger acts as a condenser to release heat to the outdoor air; in heating mode, the indoor heat exchanger acts as a condenser to release heat, and the outdoor heat exchanger acts as a condenser to absorb heat from the outdoor air.

[0003] A standard air source heat pump system can usually only operate in one mode, but users usually have multiple usage requirements. For example, during the cooling season, users may need air conditioning and domestic hot water at the same time. The existing technology usually provides an independent hot water unit specifically for domestic hot water, which leads to system redundancy, complex installation, and large space occupation. Moreover, the building's cooling and heating loads and hot water demands are real-time, random, and change drastically, but traditional control methods passively respond based on current errors and cannot predict future load changes or optimize operating strategies, resulting in an inability to achieve global optimization and energy waste. In addition, if only one condenser is set in the heat pump system, when meeting the needs of floor heating and hot water at the same time, the water temperature will be limited to a certain intermediate value due to the different required water temperatures. The lack of a clear, dynamically adjustable priority strategy results in all circuits not being met, or the secondary circuits excessively consuming the heat required by the key circuits.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0005] Some embodiments of the present application design and provide a heat pump system, including: a first refrigerant-water heat exchanger, which is used to provide domestic water; a second refrigerant-water heat exchanger, which is used to provide cooling water or heating water to indoor terminals; a refrigerant-air heat exchanger, which is used to exchange heat between the refrigerant and the air; a processing device, which includes: a first prediction unit, which is equipped with a hot water load prediction model, which is configured to generate a predicted hot water load; a second prediction unit, which is equipped with a cooling load prediction model, which is configured to generate a predicted cooling load; a decision unit, which is configured to evaluate whether the recoverable heat corresponding to the predicted cooling load meets the predicted hot water load, generate a dynamic priority based on the evaluation result, and select to execute the heat recovery hot water making mode corresponding to the dynamic priority, so that the first refrigerant-water heat exchanger works as a condenser, or the first refrigerant-water heat exchanger and the refrigerant-air heat exchanger work as condensers at the same time, and the second refrigerant-water heat exchanger works as an evaporator.

[0006] The above technical solution has the following advantages or beneficial effects: the present application realizes adaptive heat recovery based on load matching. When the recoverable heat generated by the refrigeration load completely covers the predicted hot water demand, the first refrigerant-water heat exchanger is made to work as a condenser through dynamic priority to realize pure heat recovery; when the recoverable heat generated by the refrigeration load exceeds the limit, the first refrigerant-water heat exchanger and the refrigerant-air heat exchanger are made to work as condensers at the same time through dynamic priority to realize mixed recovery, meet user requirements and reduce energy consumption.

[0007] In some embodiments of the present application, the refrigerant-air heat exchanger includes: a heat exchanger body; a reheat pipe section, which is fluidically connected to the heat exchanger body; the heat pump system also includes: a first throttling element, which is arranged between the heat exchanger body and the reheat pipe section; a second throttling element, which is arranged between the first refrigerant-water heat exchanger and the reheat pipe section; a third throttling element, one end of which is fluidically connected to the first refrigerant-water heat exchanger and the refrigerant-air heat exchanger; and the other end is fluidly connected to the second refrigerant-water heat exchanger; a first valve element, which is arranged between the exhaust side of the compressor and the first refrigerant-water heat exchanger; a first switching valve, which is used to control the flow direction of the refrigerant; and a second switching valve, which is used to The water in the second refrigerant-water heat exchanger is provided to the first indoor terminal and / or the second indoor terminal, wherein the first indoor terminal is a forced convection heat exchange terminal; when the recoverable heat is in a preset heat adaptation range, the decision unit is configured to generate a first dynamic priority and execute a first heat recovery hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the suction side of the compressor and the second refrigerant-water heat exchanger; drive the first throttling element to be in a fully closed working range; drive the second throttling element to be in a fully open working range; drive the third throttling element to be in a throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

[0008] The above technical solution has the following advantages or beneficial effects: This application realizes pure heat recovery through multi-load dynamic priority decision-making through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element and the third throttling element.

[0009] In some embodiments of the present application, when the recoverable heat is in a preset sufficient heat range, the decision unit is configured to generate a second dynamic priority and execute a second heat recovery hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the refrigerant-air heat exchanger, and to open the flow path between the compressor suction side and the second refrigerant-water heat exchanger; drive the first throttling element to be in the throttling working range, the second throttling element to be in the throttling working range, and the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

[0010] The above technical solution has the following advantages or beneficial effects: This application realizes mixed recovery through multi-load dynamic priority decision-making through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element and the third throttling element.

[0011] In some embodiments of the present application, when the recoverable heat is in a preset heat deficiency range, the decision unit is configured to generate a third dynamic priority and execute a third heat recovery hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the suction side of the compressor and the second refrigerant-water heat exchanger; drive the first throttling element to be in a fully closed working range; drive the second throttling element to be in a fully open working range; drive the third throttling element to be in a throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal; drive the auxiliary heating equipment to operate.

[0012] The above technical solution has the following advantages or beneficial effects: This application realizes dual-source heating through multi-load dynamic priority decision-making through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element, the third throttling element and the auxiliary heating equipment.

[0013] In some embodiments of the present application, the processing device can also be configured to perform a cooling mode: close the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the refrigerant-air heat exchanger, and the flow path between the compressor suction side and the second refrigerant-water heat exchanger; drive the first throttling element to be in the fully open working range, the second throttling element to be in the fully closed working range, and the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

[0014] The above technical solution has the following advantages or beneficial effects: This application establishes a multi-mode manual priority selection mechanism through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element, and the third throttling element to achieve pure heat pump refrigeration.

[0015] In some embodiments of the present application, the processing device can also be configured to execute a heating mode: close the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, the second throttling element to be in the fully closed working range, and the third throttling element to be in the fully open working range; drive the second switching valve to open the flow path between the second refrigerant-water heat exchanger and the second indoor terminal, and the second indoor terminal is a heat radiation terminal.

[0016] The above technical solution has the following advantages or beneficial effects: This application establishes a multi-mode manual priority selection mechanism through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element, and the third throttling element to achieve pure heat pump heating.

[0017] In some embodiments of the present application, the processing device can also be configured to execute a first hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the suction side of the compressor and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, the second throttling element to be in the fully open working range, and the third throttling element to be in the fully closed working range.

[0018] The above technical solution has the following advantages or beneficial effects: This application establishes a multi-mode manual priority selection mechanism through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element, and the third throttling element to realize the pure hot water making mode.

[0019] In some embodiments of the present application, the processing device can also be configured to execute a second hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, drive the second throttling element to be in the throttling working range, and drive the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

[0020] The above technical solution has the following advantages or beneficial effects: This application establishes a multi-mode manual priority selection mechanism through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element, and the third throttling element to realize the hot water making mode, and realizes space heating by the first indoor terminal.

[0021] In some embodiments of the present application, the processing device can also be configured to execute a third hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, drive the second throttling element to be in the throttling working range, and drive the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the second indoor terminal.

[0022] The above technical solution has the following advantages or beneficial effects: This application establishes a multi-mode manual priority selection mechanism through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element, and the third throttling element to realize the hot water making mode, and realizes space heating by the second indoor terminal.

[0023] In some embodiments of the present application, the processing device can also be configured to execute a fourth hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, drive the second throttling element to be in the throttling working range, and drive the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal, and the flow path between the second refrigerant-water heat exchanger and the second indoor terminal.

[0024] The above technical solution has the following advantages or beneficial effects: This application establishes a multi-mode manual priority selection mechanism through the first valve element, the first switching valve, the second switching valve, the first throttling element, the second throttling element, and the third throttling element to realize the hot water making mode, and realizes space heating by the first indoor terminal and the second indoor terminal.

[0025] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 2 A schematic structural diagram of a heat pump system provided in some embodiments of the present invention; Figure 3 A schematic structural diagram of a processing device in a heat pump system provided in some embodiments of the present invention; Figure 4 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 5 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 6 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 7 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 8A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 9 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 10 A schematic structural diagram of a processing device in a heat pump system provided in some embodiments of the present invention; Figure 11 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 12 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 13 A schematic diagram of a refrigeration cycle of a heat pump system provided in some embodiments of the present invention; Figure 14 A schematic structural diagram of a processing device in a heat pump system provided in some embodiments of the present invention; In the picture: 10. Heat pump system; 11. Outdoor unit; 101. Compressor; 102. First protection element; 103. One-way valve; 104. Pressure sensor; 105. Second protection element; 106. Refrigerant-air heat exchanger; 107. Heat exchanger body; 108. Reheat exchange pipe section; 109. First refrigerant-water heat exchanger; 110. First heat exchange branch; 111. First water supply branch; 112. Hot water storage tank; 113. First valve element; 114. First expansion tank; 115. First circulating water pump; 116. First water flow switch; 117. First throttle element; 118, first filter; 119, second filter; 120, second throttling element; 121, high-pressure liquid accumulator; 122, third throttling element; 123, third filter; 124, fourth filter; 125, second refrigerant-water heat exchanger; 126, second heat exchange branch; 127, second water supply branch; 128, first switching valve; 129, second switching valve; 130, second expansion water tank; 131, second circulating water pump; 132, second water flow switch; 133, first indoor terminal; 134, second indoor terminal; 20. Processing device; 201. Processor; 202. Non-volatile memory; 203. Volatile memory; 204. Display device; 205. Operating device; 206. Communication interface; 207. Drive device; 208. Bus; 209. Storage medium; 210. Storage medium; 211. First prediction unit; 212. Second prediction unit; 213. Decision unit; 214. Estimation unit; 30. Auxiliary heating equipment. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0034] From a thermodynamic perspective, a heat pump system's circulation system consists of a sequentially connected evaporator, compressor, condenser, and throttling device. This system involves a series of processes, including compression, condensation, expansion, and evaporation, to cool or heat indoor spaces and / or heat domestic water.

[0035] Specifically, low-temperature, low-pressure refrigerant enters the compressor, which compresses it into high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0036] The throttling device expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid. The evaporator evaporates the refrigerant expanded in the throttling device and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves cooling by utilizing the latent heat of evaporation to exchange heat with the material being cooled.

[0037] From the perspective of hardware architecture, refer to the attached Figure 1 , introduces the refrigeration cycle of the heat pump system provided in some embodiments of the present application.

[0038] Figure 1This is a schematic diagram of the circulation system of the heat pump system 10 provided in some embodiments of the present application, in which the compressor 101 is the core component. The compressor 101 is used to compress the refrigerant, compressing the refrigerant from a low-pressure state to a high-pressure state, so that the refrigerant can effectively transfer heat in the refrigeration cycle. The exhaust side of the compressor 101 is provided with a first protection element 102, a pressure sensor 104 and a one-way valve 103. The first protection element 102 is used to detect the pressure on the exhaust side of the compressor 101. When the pressure exceeds the safety threshold, the circuit of the compressor 101 is automatically cut off to prevent the compressor 101 from being damaged due to overpressure; the pressure sensor 104 monitors the pressure of the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 101 in real time, and provides pressure feedback for the compressor 101 and the throttling device, further accurately and dynamically adjusting the operating frequency or opening to improve energy efficiency; the one-way valve 103 is used to ensure that the high-pressure gaseous refrigerant can only flow to the condenser in one direction, to prevent the refrigerant or lubricating oil from flowing back to the compressor 101 when the system is shut down. A second protection element 105 is provided on the suction side of the compressor 101. The second protection element 105 is used to detect the pressure on the suction side of the compressor 101. When the pressure is lower than the safety threshold, the circuit of the compressor 101 is automatically cut off to prevent the heat pump system from being damaged or the efficiency being reduced due to too low pressure.

[0039] The outdoor unit 11 of the heat pump system 10 refers to a portion of the circulation system including the compressor 101 .

[0040] The outdoor unit 11 further includes a refrigerant-air heat exchanger 106 and a first refrigerant-water heat exchanger 109 .

[0041] The refrigerant-air heat exchanger 106 is used to exchange heat between the refrigerant and the air. It includes a heat exchanger body 107 and a reheat exchange pipe section 108. The refrigerant exchanges heat with the air within the heat exchanger body 107. Heat exchanger pipes are provided within the heat exchanger body 107, through which the refrigerant flows, while air flows over the surface of the heat exchanger body 107 via a fan or natural convection. The reheat exchange pipe section 108 is located below the heat exchanger body 107 and is fluidically connected to the heat exchanger body 107.

[0042] In some embodiments of the present application, the throttling device includes a first throttling element 117, which is disposed between the heat exchanger body 107 and the reheat exchange pipe section 108. A first filter 118 and a second filter 119 are disposed at both ends of the first throttling element 117, respectively.

[0043] The first refrigerant-water heat exchanger 109 is used to exchange heat between the refrigerant and water, transferring heat from the refrigerant to the water, raising the water temperature and providing domestic water. The first refrigerant-water heat exchanger 109 includes a first heat exchange branch 110 and a first water supply branch 111. The refrigerant flows through the first heat exchange branch 110, while the water flows through the first water supply branch 111. The heated water is used in the domestic hot water supply system. The hot water provided by the first refrigerant-water heat exchanger 109 is stored in a hot water storage tank 112. The hot water in the hot water storage tank 112 is further transported to the water terminal through a circulation network. Water-using terminals include bathroom terminals (including but not limited to shower heads, bathtub faucets, and wash basin faucets, with water temperature requirements usually ranging from 38 to 42°C), kitchen terminals (including but not limited to kitchen sink faucets and dishwashers, with water temperature requirements usually ranging from 45 to 55°C), laundry terminals (including but not limited to washing machines, with water temperature requirements usually ranging from 30 to 60°C), cleaning terminals (including but not limited to mop pool faucets and cleaning pool faucets), and other terminals (including but not limited to towel racks, smart toilets, etc.).

[0044] The first heat exchange branch 110 is connected to the exhaust side of the compressor 101 . Exemplarily, the first heat exchange branch 110 is connected to the outlet of the one-way valve 103 .

[0045] A first valve element 113 is provided on the pipeline connecting the first heat exchange branch 110 and the exhaust side of the compressor 101 .

[0046] In some embodiments of the present application, the first valve element 113 is a solenoid valve. For example, the first valve element 113 is disposed between the pressure sensor 104 and the first heat exchange branch 110. The first valve element 113 is used to control the flow between the compressor 101 and the first heat exchange branch 110.

[0047] Specifically, the first water supply branch 111 is connected to the hot water storage tank 112 via a first expansion tank 114, a first circulating water pump 115, and a first water flow switch 116. The first circulating water pump 115 is used to circulate water between the first water supply branch 111 and the hot water storage tank 112. The first expansion tank 114 is used to buffer pressure fluctuations caused by thermal expansion of the water, maintaining pressure stability and preventing damage to the pipeline due to overpressure. The first water flow switch 116 is used to detect the water flow in the pipeline and trigger the first circulating water pump 115 to start and stop, preventing it from idling.

[0048] The reheat exchange pipe section 108 of the refrigerant-air heat exchanger 106 is fluidically connected to the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109 .

[0049] The throttling device includes a second throttling element 120 , which is disposed between the first heat exchange branch 110 and the reheat exchange pipe section 108 .

[0050] The outdoor unit also includes a high-pressure accumulator 121, which temporarily stores high-pressure liquid refrigerant discharged from the condenser to prevent flow fluctuations when the refrigerant directly enters the throttling device. Exemplarily, the high-pressure accumulator 121 is connected to the first refrigerant-water heat exchanger 109 and the refrigerant-air heat exchanger 106.

[0051] The outdoor unit 11 further includes a first switching valve 128. The first switching valve 128 is used to control the flow direction of the refrigerant to switch between the heating mode and the cooling mode.

[0052] The outdoor unit 11 also includes a second refrigerant-water heat exchanger 125, which is used to provide cooling or heating water to the indoor terminals. The second refrigerant-water heat exchanger 125 performs heat exchange between the refrigerant and water, transferring heat from the refrigerant to the water to raise or lower the water temperature. The second refrigerant-water heat exchanger 125 includes a second heat exchange branch 126 and a second water supply branch 127, with refrigerant flowing through the second heat exchange branch 126 and water flowing through the second water supply branch 127. The heated water is used for heating, for example, by supplying it to the first indoor terminal 133 and / or the second indoor terminal 134; the cooled water is used for cooling, for example, by supplying it to the first indoor terminal 133. The first indoor terminal 133 is a forced convection heat exchange terminal, and the second indoor terminal 134 is a heat radiation terminal. Forced convection heat exchange terminals, for example, fan coil units, adjust the indoor temperature through forced convection. Heat radiation terminals, for example, floor heating systems or radiators, provide low-temperature radiation heating.

[0053] The heat pump system also includes a second switching valve 129. The second switching valve 129 is used to supply water in the second refrigerant-water heat exchanger 125 to the first indoor terminal 133 and / or the second indoor terminal 134. Exemplarily, the second switching valve 129 is a three-way valve. Different flow paths can be switched between the fan coil unit and the floor heating system via the second switching valve 129. For example, during the cooling season, the second switching valve 129 switches the flow path between the second water supply branch 127 and the first indoor terminal 133; during the heating season, the second switching valve 129 switches the flow path between the second water supply branch 127 and the second indoor terminal 134.

[0054] The second water supply branch 127 is connected to the first indoor terminal 133 and / or the second indoor terminal 134 via a second expansion tank 130, a second circulating water pump 131, and a second water flow switch 132. The second circulating water pump 131 is used to circulate water between the second water supply branch 127 and the indoor terminals. The second expansion tank 130 is used to buffer pressure fluctuations caused by thermal expansion of water, maintaining pressure stability and preventing damage to the pipeline due to overpressure. The second water flow switch 132 is used to detect the water flow in the pipeline and trigger the second circulating water pump 131 to start and stop, preventing it from idling.

[0055] The throttling device also includes a third throttling element 122, which is connected to the first refrigerant-water heat exchanger 109 and the refrigerant-air heat exchanger 106. Its other end is fluidically connected to the second refrigerant-water heat exchanger 125. Specifically, the third throttling element 122 is connected to the second heat exchange branch 126. More specifically, the third throttling element 122 is disposed between the high-pressure liquid accumulator 121 and the second heat exchange branch 126. A third filter 123 and a fourth filter 124 are respectively disposed at both ends of the third throttling element 122.

[0056] The first throttling element 117, the second throttling element 120 and the third throttling element 122 can be electronic expansion valves, which are arranged at the outlet of the condenser to throttle the high-pressure liquid refrigerant into a low-temperature and low-pressure gas-liquid two-phase refrigerant, creating conditions for the evaporator to absorb heat.

[0057] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the heat pump system further comprises a processing device.

[0058] Figure 3 FIG. 2 is a block diagram of the hardware structure of the processing device 20. Figure 3 As shown, processing device 20 includes a processor 201. Processor 201 can be a dedicated processor 201, a central processing unit (CPU), or the like. Processing device 20 also includes a storage component, which can be a volatile memory 203 and / or a non-volatile memory 202. Processor 201 can access instructions or applications stored in the storage component to implement related functions.

[0059] The processing device 20 further includes a display device 204 , which is used to display various information.

[0060] The processing device 20 further includes an operating device 205 , which is configured to perform various operations.

[0061] The processing device 20 further includes a communication interface 206 .

[0062] The processing device 20 further includes a driving device 207, which is used to control hardware interrupts for interacting with the storage medium.

[0063] The processing device 20 also includes a bus 208 .

[0064] The processor 201 , the volatile memory 203 , the non-volatile memory 202 , the display device 204 , the operating device 205 , the communication interface 206 , and the drive device 207 are connected to one another via a bus 208 .

[0065] In some embodiments of the present application, a storage medium (such as Figure 3 The component 209 shown in the figure includes a compact disc read-only memory (CD-ROM), a floppy disk, a magneto-optical disk, etc., which records information optically, electrically or magnetically. Storage media (such as Figure 3 The component 210 shown in the reference numeral in FIG may also be a semiconductor memory for electrically recording information, such as a read-only memory (ROM) or a flash memory.

[0066] In some embodiments of the present application, the processing device 20 may be a system on board built based on a microcontroller unit (MCU) in the outdoor unit.

[0067] In other embodiments of the present application, the processing device 20 may be an on-board system built based on a microcontroller unit in the indoor unit.

[0068] In other embodiments of the present application, part of the functions of the processing device 20 can be implemented by an on-board system built based on a microcontroller unit in the outdoor unit, and another part of the functions can be implemented by an on-board system built based on a microcontroller unit in the indoor unit.

[0069] In other embodiments of the present application, some functions of the processing device 20 can be implemented by an edge processing device (such as a centralized controller or gateway) and / or a cloud server, and other functions can be implemented by an on-board system built based on a microcontroller unit in the outdoor unit and / or indoor unit.

[0070] In some embodiments of the present application, the processing device 20 is configured to perform a cooling mode (pure heat pump mode): close the first valve element 113 to cut off the flow between the exhaust side pipeline of the compressor 101 and the first refrigerant-water heat exchanger 109 (i.e., the first heat exchange branch 110); drive the first switching valve 128 to switch to open the flow between the exhaust side of the compressor 101 and the refrigerant-air heat exchanger 106, and the flow between the suction side of the compressor 101 and the second refrigerant-water heat exchanger 125 (i.e., the second heat exchange branch 126); drive the first throttling element 117 to be in a fully open working range, the second throttling element 120 to be in a fully closed working range, and the third throttling element 122 to be in a throttling working range; drive the second switching valve 129 to switch to open the flow between the second water supply branch 127 and the first indoor terminal 133.

[0071] The fully open working range refers to the electronic expansion valve opening corresponding to when the refrigerant flow is close to the maximum allowable value; the fully closed working range refers to the electronic expansion valve opening corresponding to when the refrigerant flow is close to the minimum allowable value; the throttling working range is the electronic expansion valve opening calculated and dynamically adjusted according to the fuzzy PID algorithm, such as the opening generated according to the evaporator outlet superheat.

[0072] Thus, if Figure 4 As shown, in the cooling mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first switching valve 128, enters the refrigerant-air heat exchanger 106, and condenses in the heat exchanger body 107 of the refrigerant-air heat exchanger 106. The heat exchanger body 107 condenses the compressed refrigerant into a liquid phase; the refrigerant flowing out of the heat exchanger body 107 first passes through the first filter 118, the first throttling element 117 in the fully open working range, and the second filter 119, and then passes through the reheat exchange pipe section 108 and flows out of the refrigerant-air heat exchanger 106; the refrigerant flowing out of the refrigerant-air heat exchanger 106 then passes through the third throttling element 122 in the throttling working range, and the second refrigerant-water heat exchanger 125 working as an evaporator; after flowing out of the second refrigerant-water heat exchanger 125, it returns to the compressor 101 for the next cycle.

[0073] The cooling mode can be set by the user. For example, the user selects "Cooling" and sets a target temperature via a remote control, wired controller, or mobile terminal. Processing device 20 receives the new setting instruction and closes first valve element 113. Based on the unknown valve elements in the current valve group, it determines whether to switch between cooling and heating modes. For example, based on preset safety logic and current operating conditions, it maintains or changes the energization state of the coil of first switching valve 128 to open the flow path between the discharge side of compressor 101 and refrigerant-air heat exchanger 106, and between the intake side of compressor 101 and second refrigerant-water heat exchanger 125. It drives first throttle element 117 to a fully open operating range, second throttle element 120 to a fully closed operating range, and third throttle element 122 to a throttling operating range, i.e., operating according to dynamically calculated openings. The speed of the compressor and fan is dynamically adjusted based on actual load demand, thereby regulating the cooling capacity output and achieving more stable temperature control and higher energy efficiency.

[0074] In some embodiments of the present application, the processing device 20 is configured to execute a heating mode (pure heat pump mode): close the first valve element 113 to cut off the flow between the exhaust side pipeline of the compressor 101 and the first refrigerant-water heat exchanger (for example, the first heat exchange branch 110); drive the first switching valve 128 to switch the flow between the exhaust side of the compressor 101 and the second refrigerant-water heat exchanger 125, and the flow between the suction side of the compressor 101 and the refrigerant-air heat exchanger 106; drive the first throttling element 117 to be in the throttling working range, the second throttling element 120 to be in the fully closed working range, and the third throttling element 122 to be in the fully open working range; drive the second switching valve 129 to switch the flow between the second water supply branch 127 and the first indoor terminal 133.

[0075] The heating mode can be set by the user (the setting process is similar to the cooling process and will not be repeated here). Figure 5 As shown, in the heating mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first switching valve 128, enters the second heat exchange branch 126 of the second refrigerant-water heat exchanger 125, and is condensed in the second refrigerant-water heat exchanger 125. The second refrigerant-water heat exchanger 125 condenses the compressed refrigerant into a liquid phase; the refrigerant flowing out of the second refrigerant-water heat exchanger 125 first passes through the third throttling element 122 in the fully open working range, and then passes through the reheat exchange pipe section 108 of the refrigerant-air heat exchanger 106, and further passes through the first throttling element 117 in the throttling working range, and the heat exchanger body 107 of the refrigerant-air heat exchanger 106 working as an evaporator; after flowing out of the heat exchanger body 107, it returns to the compressor 101 for the next cycle.

[0076] In some embodiments of the present application, the processing device 20 is configured to execute a first hot water making mode: open the first valve element 113 to connect the flow path between the exhaust side pipeline of the compressor 101 and the first heat exchange branch 110; drive the first switching valve 128 to switch the flow path between the suction side of the compressor 101 and the refrigerant-air heat exchanger 106; drive the first throttling element 117 to be in the throttling working range, the second throttling element 120 to be in the fully open working range, and the third throttling element 122 to be in the fully closed working range.

[0077] The first hot water mode can be set by the user (the setting process is similar to the cooling process and will not be repeated here). Figure 6 As shown, in the first hot water making mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first valve element 113 and enters the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109, and is condensed in the first refrigerant-water heat exchanger 109. The first refrigerant-water heat exchanger 109 condenses the compressed refrigerant into a liquid phase, transfers the heat in the refrigerant to the water, and increases the water temperature; the refrigerant flowing out of the first refrigerant-water heat exchanger 109 first passes through the second throttling element 120 in the fully open working range, then passes through the reheat exchange pipe section 108 of the refrigerant-air heat exchanger 106, and further passes through the first throttling element 117 in the throttling working range and the heat exchanger body 107 of the refrigerant-air heat exchanger 106 working as an evaporator; after flowing out of the heat exchanger body 107, it returns to the compressor 101 for the next cycle.

[0078] In some embodiments of the present application, the processing device 20 is configured to perform a second hot water making mode: open the first valve element 113 to connect the flow path between the exhaust side pipeline of the compressor 101 and the first heat exchange branch 110; drive the first switching valve 128 to switch the flow path between the exhaust side of the compressor 101 and the second refrigerant-water heat exchanger 125, and the flow path between the suction side of the compressor 101 and the refrigerant-air heat exchanger 106; drive the first throttling element 117 to be in the throttling working range, drive the second throttling element 120 to be in the throttling working range, and drive the third throttling element 122 to be in the throttling working range; drive the second switching valve 129 to switch the flow path between the second water supply branch 127 and the first indoor terminal 133.

[0079] The second hot water mode can be set by the user (the setting process is similar to the cooling process and will not be repeated here). Figure 7As shown, in the second hot water making mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first valve element 113, enters the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109, and is condensed in the first refrigerant-water heat exchanger 109. The first refrigerant-water heat exchanger 109 condenses the compressed refrigerant into a liquid phase and transfers the heat in the refrigerant to the water in the first water supply branch 111, thereby raising the water temperature; the other path passes through the one-way valve 103 and the first switching valve 128, enters the second heat exchange branch 126 of the second refrigerant-water heat exchanger 125, and is condensed in the second refrigerant-water heat exchanger 125. The second refrigerant-water heat exchanger 125 condenses the compressed refrigerant into a liquid phase and transfers the heat in the refrigerant to the water in the second water supply branch 127, thereby raising the water temperature; The water after the temperature is raised is provided to the first indoor terminal 133 (for example, a fan coil unit) through the second switching valve 129 to adjust the indoor temperature by forced convection; the refrigerant flowing out of the first heat exchange branch 110 flows through the second throttling element 120 in the throttling working range, and the refrigerant flowing out of the second heat exchange branch 126 flows through the third throttling element 122 in the throttling working range. After the two refrigerants merge, they flow into the reheat exchange pipe section 108 of the refrigerant-air heat exchanger 106. After flowing out of the reheat exchange pipe section 108, they pass through the second filter 119, the first throttling element 117 in the throttling working range, and the first filter 118, and enter the heat exchange body of the refrigerant-air heat exchanger 106 working as an evaporator; after flowing out of the heat exchanger body 107, they return to the compressor 101 for the next cycle.

[0080] In some embodiments of the present application, the processing device 20 is configured to perform a third hot water making mode: open the first valve element 113 to connect the flow path between the exhaust side pipeline of the compressor 101 and the first heat exchange branch 110; drive the first switching valve 128 to switch the flow path between the exhaust side of the compressor 101 and the second refrigerant-water heat exchanger 125, and the flow path between the suction side of the compressor 101 and the refrigerant-air heat exchanger 106; drive the first throttling element 117 to be in the throttling working range, drive the second throttling element 120 to be in the throttling working range, and drive the third throttling element 122 to be in the throttling working range; drive the second switching valve 129 to switch the flow path between the second water supply branch 127 and the second indoor terminal 134.

[0081] The second hot water mode can be set by the user (the setting process is similar to the cooling process and will not be repeated here). Figure 8As shown, in the third hot water making mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first valve element 113, enters the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109, and is condensed in the first refrigerant-water heat exchanger 109. The first refrigerant-water heat exchanger 109 condenses the compressed refrigerant into a liquid phase, and transfers the heat in the refrigerant to the water in the first water supply branch 111, thereby increasing the water temperature; the other way passes through the one-way valve 103 and the first switching valve 128, enters the second heat exchange branch 126 of the second refrigerant-water heat exchanger 125, and is condensed in the second refrigerant-water heat exchanger 125. The second refrigerant-water heat exchanger 125 condenses the compressed refrigerant into a liquid phase, and transfers the heat in the refrigerant to the water in the second water supply branch 127, thereby increasing the water temperature. The water after the temperature is raised is provided to the second indoor terminal 134 (for example, floor heating) through the second switching valve 129 to adjust the indoor temperature by heat radiation; the refrigerant flowing out of the first heat exchange branch 110 flows through the second throttling element 120 in the throttling working range, and the refrigerant flowing out of the second heat exchange branch 126 flows through the third throttling element 122 in the throttling working range. After the two refrigerants merge, they flow into the reheat exchange pipe section 108 of the refrigerant-air heat exchanger 106. After flowing out of the reheat exchange pipe section 108, they pass through the second filter 119, the first throttling element 117 in the throttling working range, and the first filter 118, and enter the heat exchange main body of the refrigerant-air heat exchanger 106 working as an evaporator; after flowing out of the heat exchanger main body 107, they return to the compressor 101 for the next cycle.

[0082] In some embodiments of the present application, the processing device 20 is configured to perform a fourth hot water making mode: open the first valve element 113 to connect the flow path between the exhaust side pipeline of the compressor 101 and the first heat exchange branch 110; drive the first switching valve 128 to switch the flow path between the exhaust side of the compressor 101 and the second refrigerant-water heat exchanger 125, and the flow path between the suction side of the compressor 101 and the refrigerant-air heat exchanger 106; drive the first throttling element 117 to be in the throttling working range, drive the second throttling element 120 to be in the throttling working range, and drive the third throttling element 122 to be in the throttling working range; drive the second switching valve 129 to switch the flow path between the second water supply branch 127 and the first indoor terminal 133, and connect the flow path between the second water supply branch 127 and the second indoor terminal 134.

[0083] The fourth hot water mode can be set by the user (the setting process is similar to the cooling process and will not be repeated here). Figure 9As shown, in the fourth hot water making mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first valve element 113, enters the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109, and is condensed in the first refrigerant-water heat exchanger 109. The first refrigerant-water heat exchanger 109 condenses the compressed refrigerant into a liquid phase, and transfers the heat in the refrigerant to the water in the first water supply branch 111, thereby raising the water temperature; the other way passes through the one-way valve 103 and the first switching valve 128, enters the second heat exchange branch 126 of the second refrigerant-water heat exchanger 125, and is condensed in the second refrigerant-water heat exchanger 125. The second refrigerant-water heat exchanger 125 condenses the compressed refrigerant into a liquid phase, and transfers the heat in the refrigerant to the water in the second water supply branch 127, thereby raising the water temperature; the water after the temperature is raised passes through the second switching valve 128. The valve 129 is provided to the first indoor terminal 133 (such as a fan coil unit) and the second indoor terminal 134 (such as floor heating) at the same time to adjust the indoor temperature by heat radiation and forced convection; the refrigerant flowing out of the first heat exchange branch 110 flows through the second throttling element 120 in the throttling working range, and the refrigerant flowing out of the second heat exchange branch 126 flows through the third throttling element 122 in the throttling working range. After the two refrigerants merge, they flow into the reheat exchange pipe section 108 of the refrigerant-air heat exchanger 106. After flowing out of the reheat exchange pipe section 108, they pass through the second filter 119, the first throttling element 117 in the throttling working range, and the first filter 118, and enter the heat exchange main body of the refrigerant-air heat exchanger 106 working as an evaporator; after flowing out of the heat exchanger main body 107, they return to the compressor 101 for the next cycle.

[0084] The openings of the first throttling element 117, the second throttling element 120, and the third throttling element 122 can be controlled based on a fuzzy PID algorithm. The fuzzy PID algorithm is a conventional algorithm for controlling the opening of throttling elements in the field of refrigeration equipment and will not be described in detail here.

[0085] like Figure 10 As shown, in some embodiments of the present application, the processing device 20 includes: a first prediction unit 211 , a second prediction unit 212 and a decision unit 213 .

[0086] The first prediction unit 211 is provided with a hot water load prediction model, which is configured to generate a predicted hot water load.

[0087] The second prediction unit 212 is provided with a cooling load prediction model, which is configured to generate a predicted cooling load.

[0088] The decision unit 213 is configured to evaluate whether the recoverable heat corresponding to the predicted refrigeration load meets the predicted hot water load, generate a dynamic priority based on the evaluation result, and select to execute the heat recovery hot water making mode corresponding to the dynamic priority, so that the first refrigerant-water heat exchanger 109 works as a condenser, or the first refrigerant-water heat exchanger 109 and the refrigerant-air heat exchanger 106 work as condensers at the same time, and the second refrigerant-water heat exchanger 125 works as an evaporator.

[0089] Specifically, the decision unit 213 is configured to evaluate whether the recoverable heat meets the predicted hot water load, and when the recoverable heat meets the predicted hot water load, generate a dynamic priority, assign the first heat recovery hot water making mode or the second heat recovery hot water making mode a higher execution priority, and execute the first heat recovery hot water making mode or the second heat recovery hot water making mode; when the recoverable heat does not meet the predicted hot water load, generate a dynamic priority, assign the third heat recovery hot water making mode a higher execution priority, execute the third heat recovery hot water making mode, and give priority to meeting domestic water needs.

[0090] In some embodiments of the present application, the hot water load prediction model is configured to predict the total thermal energy demand of users for domestic hot water within a certain period of time in the future.

[0091] In some embodiments of the present application, the hot water load model may be a machine learning model.

[0092] Features selected by the machine learning model include, but are not limited to, one or more of the following: historical hot water usage data features, temporal features, environmental features, building features, user features, and water terminal features. Historical hot water usage data features include, but are not limited to, one or more of the following: hot water flow rate, outlet water temperature, inlet water temperature, and the temperature of domestic water in the hot water storage tank 112, recorded by time. Temporal features include, but are not limited to, one or more of the following: timestamp, weekday label, weekend label, holiday label, month label, and season label, used to capture daily, weekly, and seasonal patterns. Environmental features include, but are not limited to, one or more of the following: outdoor ambient temperature, indoor ambient temperature, and weather label. Building features include, but are not limited to, building type. User features include, but are not limited to, one or more of the following: user preferred water temperature, number of residents, age range, and gender. Water terminal features include category labels, preferred water temperature set by water terminals, and frequency of use. The machine learning model can select an ensemble learning model or a deep learning model (e.g., LSTM) to capture complex relationships in the data.

[0093] In some embodiments of the present application, the hot water load model may be a statistical model (eg, Autoregressive integrated moving average, ARIMA or Seasonal Autoregressive Integrated Moving Average, SARIMA) or a linear regression model.

[0094] In some embodiments of the present application, the hot water load model may be a physical simplified model or an empirical formula based on which the average hourly flow rate is estimated based on typical user behavior to establish a user water consumption curve.

[0095] In some embodiments of the present application, the cooling load prediction model is configured to predict the total amount of heat that needs to be removed from the controlled space (air-conditioned room, building or area) within a certain period of time in the future, that is, the total amount of heat that needs to be removed so that the current indoor temperature reaches the set indoor temperature.

[0096] In some embodiments of the present application, the refrigeration load prediction model may be a machine learning model.

[0097] The features selected by the machine learning model include but are not limited to one or more of the following: historical cooling load features, time features, environmental features, spatial features and interference factor features; among which, the historical cooling load features include but are not limited to one or more of the following: actual cooling load (actual cooling capacity) recorded by time, set indoor temperature, compressor 101 frequency, start time, operating time and shutdown time; time features include but are not limited to one or more of the following: timestamp, weekday label, weekend label, holiday label, month label and season label, which are used to capture daily patterns, weekly patterns and seasonal patterns; environmental features include but are not limited to one or more of the following: outdoor ambient temperature, indoor ambient temperature, weather label, outdoor ambient humidity, indoor ambient humidity and wind speed; building features include the number of windows, window area, orientation, insulation coefficient and shading coefficient; user features include but are not limited to one or more of the following: number of permanent residents, age range and gender; interference factor features include but are not limited to one or more of the following: number of people, number and power of lighting equipment, number and power of kitchen equipment, number and power of electronic equipment, and fresh air volume. Machine learning models can choose ensemble learning models or deep learning models (for example, LSTM) to capture complex relationships in the data. Machine learning models can choose ensemble learning models or deep learning models (for example, LSTM) to capture complex relationships in the data.

[0098] In some embodiments of the present application, the refrigeration load prediction model may be an empirical formula established based on a heat balance equation.

[0099] Exemplarily, the hot water load model is configured to generate a total hot water thermal energy demand in a future time period; and the cooling load prediction model is configured to generate a total cooling load in a future time period.

[0100] In some embodiments of the present application, the processing device 20 is configured to execute a first heat recovery hot water making mode: open the first valve element 113 to connect the flow path between the exhaust side pipeline of the compressor 101 and the first heat exchange branch 110; drive the first switching valve 128 to switch the flow path between the suction side of the compressor 101 and the second heat exchange branch 126; drive the first throttling element 117 to be in a fully closed working range, the second throttling element 120 to be in a fully open working range, and the third throttling element 122 to be in a throttling working range; drive the second switching valve 129 to switch and connect the flow path between the second water supply branch 127 and the first indoor terminal 133.

[0101] Thus, if Figure 11 As shown, in the first heat recovery water heating mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first valve element 113 and enters the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109, and condenses in the first refrigerant-water heat exchanger 109. The first refrigerant-water heat exchanger 109 condenses the compressed refrigerant into a liquid phase, transfers the heat in the refrigerant to the water, and increases the water temperature; the refrigerant flowing out of the first refrigerant-water heat exchanger 109 first passes through the fully open working range. The second throttling element 120 further transfers heat from the refrigerant to water through the third throttling element 122 in the throttling working range and the second heat exchange branch 126 of the second refrigerant-water heat exchanger 125 working as an evaporator, thereby lowering the water temperature. The water with lowered temperature is provided to the first indoor terminal 133 (such as a fan coil unit) through the second switching valve 129 to adjust the indoor temperature by forced convection. The refrigerant flowing out of the second heat exchange branch 126 returns to the compressor 101 for the next cycle.

[0102] During this process, the heat released by the high-temperature, high-pressure gaseous refrigerant discharged from compressor 101 during condensation, traditionally considered waste heat, is captured by first refrigerant-water heat exchanger 109 and used to heat water. Simultaneously, the refrigerant absorbs heat during evaporation, providing cooling for the room. This water heating process consumes no additional energy and fully recovers the waste heat inherent in the refrigeration process.

[0103] In some embodiments of the present application, the processing device 20 is configured to perform a second heat recovery hot water making mode: open the first valve element 113 to connect the flow path between the exhaust side pipeline of the compressor 101 and the first heat exchange branch 110; drive the first switching valve 128 to switch the flow path between the exhaust side of the compressor 101 and the refrigerant-air heat exchanger 106, and connect the flow path between the suction side of the compressor 101 and the second refrigerant-water heat exchanger 125; drive the first throttling element 117 to be in the throttling working range, the second throttling element 120 to be in the throttling working range, and the third throttling element 122 to be in the throttling working range; drive the second switching valve 129 to switch the flow path between the second water supply branch 127 and the first indoor terminal 133.

[0104] Thus, if Figure 12 As shown, in the second heat recovery hot water making mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first valve element 113, enters the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109, and is condensed in the first refrigerant-water heat exchanger 109. The first refrigerant-water heat exchanger 109 condenses the compressed refrigerant into a liquid phase, transfers the heat in the refrigerant to the water, and increases the water temperature; the refrigerant flowing out of the first refrigerant-water heat exchanger 109 passes through the second throttling element 120 in the throttling working range; the other way passes through the one-way valve 103 and the first switching valve 128, enters the refrigerant-air heat exchanger 106, and is condensed in the heat exchanger body 107 of the refrigerant-air heat exchanger 106. The heat exchanger body condenses the compressed refrigerant into a liquid phase; the refrigerant flowing out of the heat exchanger body 107 first passes through the The refrigerant passes through the first filter 118, the first throttling element 117 and the second filter 119 in the throttling working range, and then flows out of the refrigerant-air heat exchanger 106 through the reheat exchange pipe section 108; the refrigerant passing through the second throttling element 120 and the refrigerant flowing out of the refrigerant-air heat exchanger 106 through the reheat exchange pipe section 108 are merged, and the merged refrigerant then passes through the third throttling element 122 in the throttling working range and the second heat exchange branch 126 of the second refrigerant-water heat exchanger 125 working as an evaporator; the heat in the refrigerant is transferred to the water to reduce the water temperature; the water with reduced temperature is provided to the first indoor terminal 133 (for example, a fan coil unit) through the second switching valve 129 to adjust the indoor temperature by forced convection; after flowing out of the second refrigerant-water heat exchanger 125, it returns to the compressor 101 for the next cycle.

[0105] In the second heat recovery water heating mode, the heat pump system uses a dual condenser design. The high-temperature, high-pressure refrigerant discharged from compressor 101 enters the first refrigerant-water heat exchanger 109 for condensation and is used to prepare hot water. The other path enters the refrigerant-air heat exchanger 106 for condensation and is used to dissipate heat to the outdoor environment. In the second heat recovery water heating mode, the heat pump system needs to simultaneously prepare hot water and provide cooling. If the heat required to prepare hot water is less than the heat generated by compressor 101, there will be excess heat that cannot be utilized by the water-cooled heat exchanger. In this case, the refrigerant-air heat exchanger 106 can discharge this excess heat to the outdoor environment, preventing the heat pump system's condensation pressure from exceeding the upper limit and maintaining normal operation of the heat pump system.

[0106] The first throttling element 117, the second throttling element 120 and the third throttling element 122 are all in the throttling working range; the first throttling element 117 in the throttling working range and the second throttling element 120 in the throttling working range can dynamically adjust the heat rejection capacity of the refrigerant-air heat exchanger 106 and the heat absorption capacity of the first refrigerant-water heat exchanger 109 according to the condensing pressure to maintain the stability of the condensing pressure of the heat pump system; the second throttling element 120 in the throttling working range can also control the refrigerant flow in the first refrigerant-water heat exchanger 109 to ensure the hot water temperature; the third throttling element 122 in the throttling working range affects the evaporation pressure and temperature by controlling the refrigerant flow before the second refrigerant-water heat exchanger 125 to ensure the cooling effect; at the same time, the first throttling element 117, the second throttling element 120 and the third throttling element 122 are coordinated and adjusted to minimize the heat discharged to the environment and make use of waste heat as much as possible to prepare hot water.

[0107] The openings of the first throttling element 117, the second throttling element 120, and the third throttling element 122 can be controlled based on a fuzzy PID algorithm. The fuzzy PID algorithm is a conventional algorithm for controlling the opening of throttling elements in the field of refrigeration equipment and will not be described in detail here.

[0108] In some embodiments of the present application, the processing device 20 is configured to perform a third heat recovery hot water making mode: open the first valve element 113 to connect the flow path between the exhaust side pipeline of the compressor 101 and the first heat exchange branch 110; drive the first switching valve 128 to switch the flow path between the suction side of the compressor 101 and the second heat exchange branch 126; drive the first throttling element 117 to be in a fully closed working range, the second throttling element 120 to be in a fully open working range, and the third throttling element 122 to be in a throttling working range; drive the second switching valve 129 to switch the flow path between the second water supply branch 127 and the first indoor terminal 133; drive the auxiliary heating device 30 to operate so that the water in the hot water storage tank 112 reaches the set temperature.

[0109] Thus, if Figure 13As shown, in the third heat recovery water heating mode, the high-temperature and high-pressure refrigerant gas discharged from the compressor 101 passes through the one-way valve 103 and the first valve element 113 and enters the first heat exchange branch 110 of the first refrigerant-water heat exchanger 109, and condenses in the first refrigerant-water heat exchanger 109. The first refrigerant-water heat exchanger 109 condenses the compressed refrigerant into a liquid phase, transfers the heat in the refrigerant to the water, and increases the water temperature; the refrigerant flowing out of the first refrigerant-water heat exchanger 109 first passes through the second throttling element 120 in the fully open working range, and further passes through The third throttling element 122 in the throttling operating range and the second heat exchange branch 126 of the second refrigerant-water heat exchanger 125, which operates as an evaporator, transfer heat from the refrigerant to the water, thereby lowering the water temperature. The lowered temperature water is supplied to the first indoor terminal 133 (e.g., a fan coil unit) via the second switching valve 129 to regulate the indoor temperature by forced convection. The refrigerant flowing out of the second heat exchange branch 126 returns to the compressor 101 for the next cycle, thereby driving the auxiliary heating device 30 to operate, so that the water in the hot water storage tank 112 reaches the set temperature.

[0110] When the recovered heat is insufficient to reach the set water temperature, the control device starts the auxiliary heating device 30 to fill the heat gap through the auxiliary heat source.

[0111] In some embodiments of the present application, the auxiliary heating device 30 is an electric heating element.

[0112] In some embodiments of the present application, the auxiliary heating device 30 is a solar heating device; In some embodiments of the present application, the auxiliary heating device 30 is a wall-mounted gas furnace.

[0113] For example, the hot water in the first water supply branch 111 may be introduced into the auxiliary plate heat exchanger and heated again by the auxiliary heating device 30 .

[0114] like Figure 14 As shown, in some embodiments of the present application, the processing device 20 includes: A first prediction unit 211 is provided with a hot water load prediction model configured to generate a predicted hot water load; A second prediction unit 212 is provided with a cooling load prediction model configured to generate a predicted cooling load; An estimating unit 214 configured to calculate the corresponding recoverable heat based on the predicted refrigeration load; The decision unit 213 is configured to evaluate whether the recoverable heat meets the predicted hot water load, and to execute the first heat recovery hot water making mode or the second heat recovery hot water making mode when the recoverable heat meets the predicted hot water load; and to execute the third heat recovery hot water making mode when the recoverable heat does not meet the predicted hot water load.

[0115] In some embodiments of the present application, the estimation unit 214 is configured to calculate the recoverable heat based on the predicted refrigeration load.

[0116] In principle, when a heat pump system is operating, it absorbs heat from low-temperature areas while consuming electricity to drive compressor 101, releasing energy to a high-temperature heat source. In theory, the heat discharged from the condenser can be recovered, but in practical systems, heat losses must be considered.

[0117] In some embodiments of the present application, the estimation unit 214 may call a pre-configured heat recovery coefficient and calculate the recoverable heat by multiplying the heat recovery coefficient by the predicted refrigeration load.

[0118] The pre-configured heat recovery coefficient is a dimensionless empirical coefficient that is determined based on the performance parameters of the specific heat pump system (such as the rated or average coefficient of performance (COP) in cooling mode and the heat recovery efficiency calibrated under experimental conditions or typical operating conditions).

[0119] In some embodiments of the present application, the decision unit 213 is configured to: generate a first dynamic priority when the recoverable heat is in a preset heat adaptation range and execute a first heat recovery hot water making mode; generate a second dynamic priority when the recoverable heat is in a preset heat sufficient range and execute a second heat recovery hot water making mode; generate a third dynamic priority when the recoverable heat is in a preset heat insufficient range and execute a third heat recovery hot water making mode.

[0120] For example, the heat adaptation interval can be set to 1 times the recoverable heat to 1.2 times the recoverable heat; the heat sufficient interval can be set to more than 1.2 times the recoverable heat; and the heat insufficient interval can be set to less than the recoverable heat.

[0121] It should be noted that any one of the first prediction unit 211 , the second prediction unit 212 , the decision unit 213 and the estimation unit 214 can be implemented by the processor 301 running a program.

[0122] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0123] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. Heat pump system, including: a first refrigerant-water heat exchanger for providing domestic water; A second refrigerant-water heat exchanger, which is used to provide cooling water or heating water to the indoor terminal; a refrigerant-air heat exchanger for exchanging heat between the refrigerant and the air; It is characterized by further comprising: A processing device comprising: a first prediction unit having a hot water load prediction model configured to generate a predicted hot water load; a second prediction unit, wherein a cooling load prediction model is configured to generate a predicted cooling load; a decision-making unit, configured to evaluate whether the recoverable heat corresponding to the predicted refrigeration load meets the predicted hot water load, generate a dynamic priority based on the evaluation result, and select to execute a heat recovery hot water making mode corresponding to the dynamic priority, so that the first refrigerant-water heat exchanger works as a condenser, or the first refrigerant-water heat exchanger and the refrigerant-air heat exchanger work as condensers at the same time, and the second refrigerant-water heat exchanger works as an evaporator.

2. The heat pump system according to claim 1, characterized in that The refrigerant-air heat exchanger comprises: Heat exchanger body; a reheat exchange pipe section, which is fluidically connected to the heat exchanger body; Also includes: a first throttling element, which is arranged between the heat exchanger body and the reheat exchange tube section; a second throttling element, which is arranged between the first refrigerant-water heat exchanger and the reheat exchange pipe section; a third throttling element, one end of which is fluidically connected to the first refrigerant-water heat exchanger and the refrigerant-air heat exchanger; and the other end of which is fluidically connected to the second refrigerant-water heat exchanger; a first valve element disposed between the discharge side of the compressor and the first refrigerant-water heat exchanger; a first switching valve, which is used to control the flow direction of the refrigerant; a second switching valve for supplying water in the second refrigerant-water heat exchanger to a first indoor terminal and / or a second indoor terminal, wherein the first indoor terminal is a forced convection heat exchange terminal; When the recoverable heat is in a preset heat adaptation range, the decision unit is configured to generate a first dynamic priority and execute a first heat recovery hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the suction side of the compressor and the second refrigerant-water heat exchanger; drive the first throttling element to be in a fully closed working range; drive the second throttling element to be in a fully open working range; drive the third throttling element to be in a throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

3. The heat pump system according to claim 2, characterized in that When the recoverable heat is within a preset sufficient heat range, the decision unit is configured to generate a second dynamic priority and execute a second heat recovery hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor discharge side and the refrigerant-air heat exchanger, and to switch the flow path between the compressor suction side and the second refrigerant-water heat exchanger; Drive the first throttling element to be in the throttling working range, the second throttling element to be in the throttling working range, and the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

4. The heat pump system according to claim 3, characterized in that When the recoverable heat is within a preset heat shortage range, the decision unit is configured to generate a third dynamic priority and execute a third heat recovery hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the suction side of the compressor and the second refrigerant-water heat exchanger; driving the first throttling element to be in a fully closed working range; Drive the second throttling element to be in the fully open working range; drive the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal; drive the auxiliary heating equipment to operate.

5. The heat pump system according to any one of claims 2 to 4, characterized in that: The processing device may be further configured to execute a cooling mode by closing the first valve element; driving the first switching valve to switch the flow path between the compressor discharge side and the refrigerant-air heat exchanger, and the flow path between the compressor suction side and the second refrigerant-water heat exchanger; driving the first throttling element to be in a fully open working range, the second throttling element to be in a fully closed working range, and the third throttling element to be in a throttling working range; The second switching valve is driven to switch and connect the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

6. The heat pump system according to claim 5, characterized in that The processing device may be further configured to execute a heating mode by closing the first valve element; driving the first switching valve to switch the flow path between the compressor discharge side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; The first throttling element is driven to be in the throttling working range, the second throttling element is driven to be in the fully closed working range, and the third throttling element is driven to be in the fully open working range; the second switching valve is driven to conduct the flow path between the second refrigerant-water heat exchanger and the second indoor terminal, and the second indoor terminal is a heat radiation terminal.

7. The heat pump system according to claim 6, characterized in that The processing device may be further configured to execute a first hot water heating mode by: opening the first valve element; driving the first switching valve to switch the flow path between the suction side of the compressor and the refrigerant-air heat exchanger; The first throttling element is driven to be in a throttling working range, the second throttling element is driven to be in a fully open working range, and the third throttling element is driven to be in a fully closed working range.

8. The heat pump system according to claim 7, characterized in that The processing device can also be configured to execute a second hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, drive the second throttling element to be in the throttling working range, drive the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal.

9. The heat pump system according to claim 8, characterized in that The processing device can also be configured to execute a third hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, drive the second throttling element to be in the throttling working range, drive the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the second indoor terminal.

10. The heat pump system according to claim 9, characterized in that The processing device can also be configured to execute a fourth hot water making mode: open the first valve element; drive the first switching valve to switch the flow path between the compressor exhaust side and the second refrigerant-water heat exchanger, and the flow path between the compressor suction side and the refrigerant-air heat exchanger; drive the first throttling element to be in the throttling working range, drive the second throttling element to be in the throttling working range, drive the third throttling element to be in the throttling working range; drive the second switching valve to switch the flow path between the second refrigerant-water heat exchanger and the first indoor terminal, and the flow path between the second refrigerant-water heat exchanger and the second indoor terminal.

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