Heat pump system for floor heating and domestic hot water supply

Abstract

The utility model discloses a floor heating and domestic hot water combined heat pump system, comprising: refrigerant circulation loop: compressor, first air side heat exchanger, four -way valve, second air side heat exchanger and intermediate heat exchanger form, intermediate heat exchanger includes: first heat exchange pipe part and second heat exchange pipe part, water circulation loop: floor heating, first heat exchange pipe part, second heat exchange pipe part, water pump and water tank heat exchanger constitute, first heat exchange pipe part is connected with floor heating, second heat exchange pipe part is connected with first heat exchange pipe part, water tank heat exchanger and floor heating, first control valve controls first heat exchange pipe part and floor heating or water tank heat exchanger intercommunication, when system is in floor heating water tank linkage operation mode, first heat exchange pipe part, second heat exchange pipe part, first control valve and water tank heat exchanger form domestic hot water circulation loop, and floor heating, second heat exchange pipe part form first floor heating water circulation loop, the heat pump system of the utility model sets up one intermediate heat exchanger and can realize the simultaneous supply of floor heating and domestic hot water.

Description

Technical Field

[0001] This utility model relates to the field of heat pump technology, specifically to an improvement in the structure of a heat pump system that combines underfloor heating and domestic hot water supply. Background Technology

[0002] The existing "refrigerant-based water-based" heat pump system can be used to supply underfloor heating water or domestic hot water. The heat pump unit has a refrigerant circulation loop and a water circulation loop. In the refrigerant circulation loop, the refrigerant and in the water circulation loop, the water exchange heat in an intermediate heat exchanger.

[0003] The underfloor heating and domestic hot water heat exchangers are connected in parallel to an intermediate heat exchanger. In the piping layout, an electric three-way valve is installed to switch the flow path. By opening and closing the valve, the intermediate heat exchanger can be connected to either the underfloor heating or the domestic hot water heat exchanger to form a circulating water loop, thus achieving the alternating operation of underfloor heating and domestic hot water. However, with this piping structure, underfloor heating and domestic hot water cannot operate simultaneously.

[0004] With continuous development, heat pump systems capable of simultaneously operating underfloor heating and domestic hot water have emerged. These systems employ two intermediate heat exchangers, connected to the underfloor heating and domestic hot water systems respectively for heat exchange. However, this two-intermediate-heat-exchange-tank configuration increases the overall cost of the heat pump system. Utility Model Content

[0005] In response to the aforementioned technical problems mentioned in the background section, a heat pump system for the combined supply of underfloor heating and domestic hot water is proposed. This system can achieve the simultaneous supply of underfloor heating and domestic hot water by setting up an intermediate heat exchanger, thereby reducing costs.

[0006] In some embodiments of this application, a heat pump system for combined underfloor heating and domestic hot water supply is proposed, characterized by comprising:

[0007] Refrigerant circulation loop: It is formed by connecting the compressor, the first air-side heat exchanger, the four-way valve, the second air-side heat exchanger and the intermediate heat exchanger through refrigerant pipelines;

[0008] The intermediate heat exchanger includes: a water-side heat exchange tube that exchanges heat with the refrigerant in the refrigerant circulation loop, the water-side heat exchange tube including: a first heat exchange tube section and a second heat exchange tube section;

[0009] Water circulation loop: It consists of underfloor heating, the first heat exchange pipe section, the second heat exchange pipe section, a water pump, and a water tank heat exchanger arranged in the water tank, which are connected by water pipes.

[0010] The first heat exchange tube section has its outlet end connected to the inlet end of the underfloor heating system.

[0011] The outlet of the second heat exchange tube section is connected to the inlet of the first heat exchange tube section and the inlet of the underfloor heating system. The inlet of the tube section is connected to the outlet of the water tank heat exchanger and the outlet of the underfloor heating system.

[0012] The first control valve is connected to the first heat exchange tube section, the underfloor heating system, and the water tank heat exchanger.

[0013] A controller is used to control the operation of the first control valve to connect the first heat exchange tube section to the underfloor heating system or the water tank heat exchanger.

[0014] The heat pump system has a floor heating water tank linkage operation mode. When it is in the floor heating water tank linkage operation mode, the controller controls the first control valve to connect the first heat exchange tube section and the water tank heat exchanger.

[0015] A domestic hot water circulation loop is formed between the first heat exchange tube section, the second heat exchange tube section, the first control valve, and the water tank heat exchanger.

[0016] A first floor heating water circulation loop is formed between the floor heating system and the second heat exchange pipe section.

[0017] The above embodiments have the following advantages and effects:

[0018] In this embodiment, the heat pump system improves the structure of the water-side heat exchanger tubes of the intermediate heat exchanger by setting the water-side heat exchanger tubes into two independent first heat exchanger tube sections and second heat exchanger tube sections. During connection, the first heat exchanger tube section is connected to the underfloor heating system, and the outlet of the second heat exchanger tube section is connected to the inlet of the first heat exchanger tube section and the inlet of the underfloor heating system. Its inlet is connected to the outlet of the underfloor heating system and the outlet of the water tank heat exchanger, respectively. By switching the first control valve, the water flow path structure in the circulating water pipeline is changed, so that a domestic hot water circulation loop can be formed between the water tank heat exchanger, the first heat exchanger tube section, the second heat exchanger tube section, and the first control valve to supply domestic hot water. At the same time, a first underfloor heating water circulation loop is formed between the second heat exchanger tube section and the underfloor heating system to supply water to the underfloor heating system. By using an intermediate heat exchanger, both underfloor heating water supply and domestic hot water supply are realized simultaneously, reducing the cost of the entire system.

[0019] Some embodiments of this application include:

[0020] The second control valve has one end connected between the first heat exchange tube section and the second heat exchange tube section, and the other end connected to the first control valve and the underfloor heating system.

[0021] When the system is in the interlocked operation mode of the underfloor heating water tank, the controller controls the second control valve to open;

[0022] The domestic hot water circulation loop is formed between the first heat exchange tube section, the second heat exchange tube section, the first control valve, and the water tank heat exchanger.

[0023] The first floor heating water circulation loop is formed between the floor heating system, the second heat exchange pipe section, and the second control valve.

[0024] The above embodiments have the following advantages and effects:

[0025] By connecting one end to the second control valve, which is connected between the first and second heat exchange tube sections, and the other end to the second control valve, which is connected between the first control valve and the underfloor heating system, the ratio of domestic hot water flow to underfloor heating water flow can be reasonably allocated and adjusted when the heat pump system is operating in the underfloor heating water tank linkage mode, thus ensuring the effectiveness of domestic hot water use and underfloor heating water supply.

[0026] In some embodiments of this application, the heat pump system has a floor heating mode. When the heat pump system is in the floor heating mode, the controller controls the first control valve to operate, so that the first heat exchange tube section is connected to the floor heating system, and controls the second control valve to close.

[0027] A second floor heating water circulation loop is formed by the first heat exchange pipe section, the second heat exchange pipe section, the first control valve, and the floor heating room.

[0028] The above embodiments have the following advantages and effects:

[0029] With the first and second control valves installed in the heat pump unit, during use, the first heat exchange tube section can be connected to the underfloor heating system by controlling the first control valve, and the underfloor heating system can be operated in a single underfloor heating mode by controlling the second control valve to close the system. This allows the entire system to not only achieve coordinated operation of the underfloor heating water tank but also to achieve independent operation of the underfloor heating system, thus meeting various user needs.

[0030] In some embodiments of this application, the heat pump system has a domestic hot water mode. When the heat pump system is in the domestic hot water mode, the controller controls the first control valve to operate, so that the first heat exchange tube section is connected to the water tank heat exchanger, and controls the second control valve to close.

[0031] The domestic hot water circulation loop is formed between the first heat exchange tube section, the second heat exchange tube section, the first control valve, and the water tank heat exchanger.

[0032] The above embodiments have the following advantages and effects:

[0033] By using the first and second control valves installed in the heat pump unit, the first control valve can be controlled to connect the first heat exchange tube section and the water tank heat exchanger, while the second control valve can be controlled to close the system to enable the system to operate in a single domestic hot water mode. This allows the entire system to not only achieve coordinated operation of the underfloor heating water tank and independent operation of the underfloor heating system, but also independent operation of domestic hot water, thus meeting a variety of different user needs.

[0034] In some embodiments of this application, the water pipeline includes:

[0035] The first connecting pipe connects the underfloor heating system and the first heat exchange pipe section;

[0036] The second connecting pipe is connected at one end to the water tank heat exchanger and at the other end to the first connecting pipe. The first control valve is installed at the intersection of the second connecting pipe and the first connecting pipe.

[0037] The above embodiments have the following advantages and effects:

[0038] By connecting the first control valve at the intersection of the first and second connecting pipes, during control, the valve port of the first control valve can be switched to connect the first heat exchange pipe section connected to both ends of the first connecting pipe with the underfloor heating system, or to connect the first heat exchange pipe section connected to the first and second connecting pipes with the water tank heat exchanger.

[0039] In some embodiments of this application, the water pipe includes:

[0040] The third connecting pipe has one end connected between the first heat exchange tube section and the second heat exchange tube section, and the other end connected between the underfloor heating system and the first control valve. The second control valve is installed on the third connecting pipe.

[0041] The above embodiments have the following advantages and effects:

[0042] By connecting the outlet of the second heat exchange tube section and the third connecting pipe between the underfloor heating system and the first control valve, part of the water flow after heat exchange through the second heat exchange tube section can be diverted to the underfloor heating system to ensure that when the heat pump system is in the underfloor heating and water tank linkage operation mode, the water flow can flow in both the underfloor heating system and the water tank heat exchanger at the same time.

[0043] In some embodiments of this application, the water pipe includes:

[0044] The fourth connecting pipe connects the second heat exchange tube section and the water tank heat exchanger.

[0045] The fifth connecting pipe is connected at one end to the underfloor heating system and at the other end to the fourth connecting pipe between the second heat exchange pipe section and the water tank heat exchanger.

[0046] The above embodiments have the following advantages and effects:

[0047] The fifth connecting pipe can introduce the water flowing out of the underfloor heating system into the fourth connecting pipe. The fourth connecting pipe can introduce both the water flowing out of the water tank heat exchanger and the water flowing out of the underfloor heating system into the second heat exchange tube section. This allows the water to flow through the second heat exchange tube section for heat exchange when the heat pump system is running in underfloor heating mode, domestic hot water mode, or underfloor heating water tank linkage mode.

[0048] In some embodiments of this application, the first heat exchange tube section includes:

[0049] The first interface section is connected to the first connecting pipe;

[0050] Second interface section;

[0051] The second heat exchange tube section includes:

[0052] The third interface section is connected to the second interface section via a connecting pipe;

[0053] The fourth interface section is connected to the fourth connecting pipe.

[0054] The above embodiments have the following advantages and effects:

[0055] By configuring the first heat exchange tube section with two interfaces, a first interface section and a second interface section, and the second heat exchange tube section with two interfaces, a third interface section and a fourth interface section, each heat exchange tube section has two interfaces for water inlet and water outlet. In application, each heat exchange tube section can be used independently, thereby enabling the entire heat pump system to achieve coordinated operation of underfloor heating and water tank.

[0056] In some embodiments of this application, the intermediate heat exchanger includes:

[0057] The refrigerant-side heat exchanger tube is used for heat exchange with the water-side heat exchanger tube and has a first refrigerant interface and a second refrigerant interface.

[0058] The above embodiments have the following advantages and effects:

[0059] Two refrigerant interface sections are provided at the refrigerant-side heat exchange pipes to connect with the refrigerant circulation loop, allowing refrigerant to be introduced into the refrigerant-side heat exchange pipes for heat exchange with the water-side heat exchange pipes. The entire intermediate heat exchanger has two refrigerant interface sections and four interface sections on the water-side heat exchange pipes, with a structure of six interface sections. This enables the interlocking operation of the underfloor heating water tank with just one intermediate heat exchanger, reducing costs.

[0060] In some embodiments of this application, the first control valve has: a first valve port, a second valve port, and a third valve port;

[0061] The first valve port and the second valve port are respectively connected to the first connecting pipeline;

[0062] The third valve port is connected to the second connecting pipe;

[0063] When the first valve port and the second valve port are connected, the first heat exchange tube and the first connecting pipe are connected.

[0064] When the first valve port and the third valve port are connected, the first heat exchange tube and the second connecting pipe are connected.

[0065] The above embodiments have the following advantages and effects:

[0066] By having at least three valve ports—a first valve port, a second valve port, and a third valve port—and connecting these three valve ports to the first heat exchange tube, the underfloor heating system, and the water tank heat exchanger, the system can switch the water flow path by controlling the opening and closing of the three valve ports during use, thus ensuring that the system can operate in different modes.

[0067] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0068] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0069] Figure 1 The principle of the heat pump system for combined underfloor heating and domestic hot water supply according to the embodiment. Figure 1 ;

[0070] Figure 2 The principle of the heat pump system for combined underfloor heating and domestic hot water supply according to the embodiment. Figure 2 ;

[0071] Figure 3 This is a schematic diagram of the intermediate heat exchanger in a heat pump system for combined underfloor heating and domestic hot water supply according to an embodiment.

[0072] Figure 4 This is a schematic diagram of the structure of a heat pump system for combined underfloor heating and domestic hot water supply according to an embodiment, in the mode of operation linked to the underfloor heating water tank. Figure 1 ;

[0073] Figure 5 This is a schematic diagram of the structure of a heat pump system for combined underfloor heating and domestic hot water supply according to an embodiment, in the mode of operation linked to the underfloor heating water tank. Figure 2 ;

[0074] Figure 6 This is a schematic diagram of the structure of a heat pump system for combined underfloor heating and domestic hot water supply according to an embodiment, in underfloor heating mode.

[0075] Figure 7This is a schematic diagram of the structure of a heat pump system for combined underfloor heating and domestic hot water supply according to an embodiment, in domestic hot water mode.

[0076] Figure 8 A schematic diagram of the water flow path in the combined underfloor heating and domestic hot water supply heat pump system according to an embodiment, in the underfloor heating water tank linkage mode.

[0077] Figure 9 A control block diagram of the controller for a heat pump system that combines underfloor heating and domestic hot water supply according to an embodiment, when the system is in the underfloor heating water tank linkage mode.

[0078] Figure 9 A control block diagram of the controller for a heat pump system that combines underfloor heating and domestic hot water supply according to an embodiment, when the system is in the underfloor heating water tank linkage mode.

[0079] Figure 10 This is a control block diagram of the controller of the heat pump system for combined underfloor heating and domestic hot water supply according to an embodiment, when the system is in underfloor heating mode.

[0080] Figure 11 This is a control block diagram of the controller when the heat pump system for combined underfloor heating and domestic hot water supply is in domestic hot water mode, according to an embodiment.

[0081] Reference numerals: 110, compressor; 120, first air-side heat exchanger; 130, four-way valve; 140, second air-side heat exchanger; 150, intermediate heat exchanger; 151, first heat exchange tube section; 1511, first interface section; 1512, second interface section; 152, second heat exchange tube section; 1521, third interface section; 1522, fourth interface section; 153, refrigerant-side heat exchange tube; 1531, first refrigerant interface section; 1532, fourth interface section; 210 Refrigerant interface section; 220 Underfloor heating; 230 Water pump; 240 Water tank heat exchanger; 241 First connecting pipe; 241 Unloading valve; 250 Second connecting pipe; 260 Third connecting pipe; 270 Fourth connecting pipe; 271 Expansion tank; 280 Fifth connecting pipe; 300 First control valve; 310 First valve port; 320 Second valve port; 330 Third valve port; 400 Second control valve. Detailed Implementation

[0082] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0083] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0084] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0085] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0086] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0087] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0088] In some embodiments of this application, a heat pump system for combined underfloor heating 210 and domestic hot water supply is proposed, comprising: a refrigerant circulation loop and a water circulation loop that can exchange heat with the refrigerant in the refrigerant circulation loop.

[0089] The refrigerant circulation loop is formed by connecting the compressor 110, the first air-side heat exchanger 120, the second air-side heat exchanger 140, the four-way valve 130, and the intermediate heat exchanger 150 through refrigerant pipelines.

[0090] When connected, the four-way valve 130 is connected to the exhaust pipe, intake pipe, first air-side heat exchanger 120 and second air-side heat exchanger 140 of the compressor 110 respectively, and the second air-side heat exchanger 140 and the first air-side heat exchanger 120 are connected.

[0091] The intermediate heat exchanger 150 is arranged in parallel with the second air-side heat exchanger 140, with one end connected to the exhaust pipe of the compressor 110 and the other end connected to the first air-side heat exchanger 120.

[0092] When the heat pump system is running, such as Figure 1 The refrigerant flowing out of the compressor 110 discharge pipe partially flows through the four-way valve 130 into the second air-side heat exchanger 140 to release heat, and part of it directly enters the intermediate heat exchanger 150 to release heat. The heat released in the intermediate heat exchanger 150 is absorbed and utilized by the water flow in the water circulation loop.

[0093] The refrigerant that flows through the second air-side heat exchanger 140 and the intermediate heat exchanger 150 then flows to the first air-side heat exchanger 120 to absorb heat and then flows back to the compressor 110.

[0094] Of course, during use, the valves on the first air-side heat exchanger 120 can also be closed, and a refrigerant circulation loop can be formed through the second air-side heat exchanger 140 and the intermediate heat exchanger 150.

[0095] By switching the four-way valve 130, the second air-side heat exchanger 140 is made to function as an evaporator.

[0096] like Figure 2As shown, the refrigerant flows out of the compressor 110 and enters the intermediate heat exchanger 150 to release heat, then flows through the second air-side heat exchanger 140 to absorb heat, and finally flows back into the compressor 110.

[0097] The intermediate heat exchanger 150 includes a refrigerant-side heat exchange tube 153 and a water-side heat exchange tube. The refrigerant-side heat exchange tube 153 is connected in the refrigerant circulation loop, and the water-side heat exchange tube is connected in the water circulation loop.

[0098] When the heat pump unit is running, the refrigerant flows through the refrigerant-side heat exchange tube 153 and releases heat, while the water in the water-side heat exchange tube absorbs heat, thus achieving heat exchange between the two and causing the water temperature in the water-side heat exchange tube to rise.

[0099] In some embodiments of this application, such as Figure 3 As shown, the water-side heat exchange tube includes a first heat exchange tube section 151 and a second heat exchange tube section 152.

[0100] The water-side heat exchange tubes are configured as two independent first heat exchange tube sections 151 and second heat exchange tube sections 152. In use, either heat exchange tube section can be used alone for heat exchange.

[0101] In the arrangement, the refrigerant-side heat exchange tube 153 is arranged side by side with the first heat exchange tube section 151 and the second heat exchange tube section 152 in the intermediate heat exchanger 150.

[0102] When the refrigerant flowing from the refrigerant circulation loop passes through the refrigerant-side heat exchange tube 153, it exchanges heat with the first heat exchange tube section 151 and the second heat exchange tube section 152 located in the intermediate heat exchanger 150, so as to achieve the effect of raising the temperature of the water in the first heat exchange tube section 151 and the second heat exchange tube section 152.

[0103] In some embodiments of this application, such as Figure 4 As shown, the water circulation loop is formed by connecting the underfloor heating 210, the first heat exchange pipe section 151, the second heat exchange pipe section 152, the water pump 220, and the water tank heat exchanger 230 arranged in the water tank through water pipes.

[0104] The water pump 220 is used to provide the power for the flow of water in the water circulation loop and drive the water flow.

[0105] The water tank heat exchanger 230 is arranged inside the water tank to exchange heat with the water placed in the water tank. The water tank is equipped with an inlet and an outlet. The inlet can be used to easily replenish water into the water tank, and the outlet can be connected to a faucet or water supply pipe to provide domestic hot water to users.

[0106] The first heat exchange tube section 151 has its outlet end connected to the inlet end of the underfloor heating system 210.

[0107] The outlet end of the second heat exchange tube section 152 is connected to the inlet end of the first heat exchange tube section 151 and the inlet end of the underfloor heating 210, and the inlet end is connected to the outlet end of the water tank heat exchanger 230 and the outlet end of the underfloor heating 210.

[0108] The controller is connected to control the first control valve 300. The first control valve 300 can be used to control the connection between the first heat exchange tube section 151 and the underfloor heating 210 or the water tank heat exchanger 230.

[0109] The first control valve 300 is connected to the water inlet of the underfloor heating system 210, the water inlet of the water tank heat exchanger 230, and the water outlet of the first heat exchange tube section 151.

[0110] By switching control of the first control valve 300, the first heat exchange tube section 151 can be connected to the underfloor heating 210 or the water tank heat exchanger 230, so that the water flowing out of the first heat exchange tube section 151 can enter the underfloor heating 210 or the water tank heat exchanger 230.

[0111] Among them, such as Figure 4 As shown, the heat pump system has a floor heating water tank linkage operation mode. When the heat pump system is in the floor heating water tank linkage operation mode, the first control valve 300 is activated to connect the water outlet of the first heat exchange tube section 151 and the water inlet of the water tank heat exchanger 230.

[0112] After the first heat exchange tube section 151 and the water tank heat exchanger 230 are connected, a domestic hot water circulation loop is formed between the first heat exchange tube section 151, the second heat exchange tube section 152, the first control valve 300 and the water tank heat exchanger 230.

[0113] The floor heating system 210 and the second heat exchange pipe section 152 form a first floor heating system 210 water circulation loop.

[0114] Specifically, the water flowing out from the outlet of the water tank heat exchanger 230 flows into the second heat exchange tube section 152, exchanges heat with the refrigerant through the second heat exchange tube section 152, and then flows out from the outlet of the second heat exchange tube section 152 and is divided. A portion of the divided water enters the first heat exchange tube section 151 from the inlet of the first heat exchange tube section 151 to continue exchanging heat with the refrigerant. After heat exchange, it flows through the first control valve 300 and returns to the water tank heat exchanger 230 from the inlet of the water tank heat exchanger 230.

[0115] The other part of the diversion flows into the underfloor heating 210, providing hot water to the underfloor heating 210. After flowing out of the underfloor heating 210, it mixes with the water flowing out of the water tank heat exchanger 230 and flows back into the second heat exchange tube section 152.

[0116] As can be seen from the above water flow path, the water flow in the domestic hot water circulation loop is the water flow that has undergone heat exchange through the first heat exchange tube section 151 and the second heat exchange tube section 152 at the same time. In daily life, users are usually more sensitive to the domestic hot water side. Therefore, when the underfloor heating 210 and domestic hot water are running at the same time, the supply of domestic hot water is given priority.

[0117] Therefore, setting the water flow in the domestic hot water circulation loop to flow through two heat exchange sections simultaneously can effectively guarantee the outlet temperature of domestic hot water.

[0118] Since the first floor heating 210 water circulation loop supplies water to the floor heating 210, the user's perception is not obvious and the water temperature requirement is not high. Therefore, the water flow of the floor heating 210 can be the water flow after heat exchange through the second heat exchange pipe section 152.

[0119] The above embodiments have the following advantages and effects:

[0120] In this embodiment, the heat pump system improves the structure of the water-side heat exchanger tube of the intermediate heat exchanger 150 by setting the water-side heat exchanger tube into two independent first heat exchanger tube sections 151 and second heat exchanger tube sections 152. During connection, the first heat exchanger tube section 151 is connected to the underfloor heating system 210, and the outlet of the second heat exchanger tube section 152 is connected to the inlet of the first heat exchanger tube section 151 and the inlet of the underfloor heating system 210. Its inlet is then connected to the outlet of the underfloor heating system 210 and the outlet of the water tank heat exchanger 230, respectively. This is achieved through the first control valve 300. By switching the control and changing the water flow path structure in the circulating water pipeline, a domestic hot water circulation loop can be formed between the water tank heat exchanger 230, the first heat exchange tube section 151, the second heat exchange tube section 152 and the first control valve 300 to supply domestic hot water. At the same time, a first floor heating 210 water circulation loop is formed between the second heat exchange tube section 152 and the floor heating 210 to supply water to the floor heating 210. By using an intermediate heat exchanger 150, both the floor heating 210 water supply and the domestic hot water supply are realized, reducing the cost of the entire system.

[0121] In some embodiments of this application, the heat pump system includes:

[0122] The second control valve 400 is connected at one end between the first heat exchange tube section 151 and the second heat exchange tube section 152, and at the other end between the first control valve 300 and the underfloor heating 210. Its opening degree is adjustable.

[0123] like Figure 5 , 8 As shown, when the heat pump system is in the interlocking operation mode of the underfloor heating water tank, the controller controls the second control valve 400 to open;

[0124] The first heat exchange tube section 151, the second heat exchange tube section 152, the first control valve 300 and the water tank heat exchanger 230 form the domestic hot water circulation loop;

[0125] The first floor heating water circulation loop is formed between the floor heating system 210, the second heat exchange pipe section 152, and the second control valve 400.

[0126] When the heat pump system is in the interlocking operation mode of the underfloor heating water tank, the water flows into the second control valve 400 after the first heat exchange in the second heat exchange tube section 152 for diversion. This allows part of the hot water to enter the underfloor heating 210 after passing through the second control valve 400, while the other part of the hot water enters the first heat exchange tube section 151 for a second heat exchange, and then returns to the water tank heat exchanger 230 through the first control valve 300.

[0127] The second control valve 400 is an electric ball valve, which can adjust the ratio of hot water flowing into the first heat exchange tube section 151 and the underfloor heating 210 by adjusting the opening degree, that is, to adjust the ratio of domestic hot water and underfloor heating water.

[0128] The above embodiments have the following advantages and effects:

[0129] By connecting one end of a second control valve 400 between the first heat exchange tube section 151 and the second heat exchange tube section 152, and the other end between the first control valve 300 and the underfloor heating 210, the ratio of domestic hot water flow and underfloor heating 210 water flow can be reasonably allocated and adjusted when the heat pump system is operating in the underfloor heating 210 water tank linkage mode, thus ensuring the effectiveness of domestic hot water use and underfloor heating 210 water supply.

[0130] In some embodiments of this application, such as Figure 6 As shown, the heat pump system has a floor heating mode. When the heat pump system is in the floor heating mode, the controller controls the first control valve 300 to operate so that the first heat exchange tube 151 is connected to the floor heating 210, and controls the second control valve 400 to close.

[0131] The first heat exchange tube section 151, the second heat exchange tube section 152, the first control valve 300 and the floor heating 210 are connected to form a second floor heating water circulation loop.

[0132] The heat pump system also has a single underfloor heating mode. When the underfloor heating mode is needed, the first heat exchange tube section 151 and the underfloor heating 210 can be connected through the first control valve 300, while the second control valve 400 remains closed.

[0133] The water flowing out of the underfloor heating system 210 will flow through the second heat exchange pipe section 152, where it will exchange heat with the refrigerant. Since the second control valve 400 is closed, all the water after heat exchange will flow into the first heat exchange pipe section 151 to exchange heat with the refrigerant again. The water flowing out after heat exchange will flow through the first control valve 300 and then enter the underfloor heating system 210 to complete a second underfloor heating water circulation loop.

[0134] The first control valve 300 controls the connection between the first heat exchange tube section 151 and the underfloor heating 210. When the second control valve 400 is closed, the entire heat pump unit will operate in a single underfloor heating 210 mode. The water flowing into the underfloor heating 210 is the water that has undergone heat exchange through the two heat exchange tube sections.

[0135] The above embodiments have the following advantages and effects:

[0136] With the first control valve 300 and the second control valve 400 installed in the heat pump unit, during use, the first control valve 300 can control the connection between the first heat exchange tube section 151 and the underfloor heating 210, and the second control valve 400 can be closed to enable the system to operate in the underfloor heating mode alone. This allows the entire system to not only achieve the coordinated operation of the underfloor heating water tank, but also the independent operation of the underfloor heating 210, meeting a variety of different user needs.

[0137] In some embodiments of this application, the heat pump system has a domestic hot water mode, such as... Figure 7 As shown, when the system is in domestic hot water mode, the first control valve 300 controls the first heat exchange tube section 151 to connect with the water tank heat exchanger 230, and the second control valve 400 is closed.

[0138] The first heat exchange tube section 151, the second heat exchange tube section 152, the first control valve 300 and the water tank heat exchanger 230 are connected to form the domestic hot water circulation loop.

[0139] The heat pump system controls the connection between the first heat exchange tube section 151 and the water tank heat exchanger 230 through the first control valve 300, and controls the second control valve 400 to close, so that it can operate in a single domestic hot water mode.

[0140] The water flowing out of the water tank heat exchanger 230 flows into the second heat exchange tube section 152 to exchange heat with the refrigerant, and then flows into the first heat exchange tube section 151. After flowing out of the first heat exchange tube section 151, it flows back into the water tank heat exchanger 230 through the first control valve 300, thus realizing a domestic hot water circulation loop.

[0141] The above embodiments have the following advantages and effects:

[0142] With the first control valve 300 and the second control valve 400 installed in the heat pump unit, during use, the first control valve 300 can control the connection between the first heat exchange tube section 151 and the water tank heat exchanger 230, and the second control valve 400 can close to enable the system to operate in a single domestic hot water mode. This allows the entire system to not only achieve the linkage operation of the underfloor heating 210 and the water tank, and the operation of the underfloor heating 210, but also to achieve the independent operation of domestic hot water, thus meeting a variety of different user needs.

[0143] In some embodiments of this application, such as Figure 5 , 8 The water pipeline shown includes:

[0144] The first connecting pipe 240 is connected between the water inlet of the underfloor heating 210 and the water outlet of the first heat exchange pipe section 151.

[0145] The second connecting pipe 250 is connected at one end to the water inlet of the water tank heat exchanger 230 and at the other end to the first connecting pipe 240. The first control valve 300 is provided at the junction of the second connecting pipe 250 and the first connecting pipe 240.

[0146] An unloading valve 241 is installed on the first connecting pipe 240.

[0147] The above embodiments have the following advantages and effects:

[0148] By connecting the first control valve 300 at the intersection of the first connecting pipe 240 and the second connecting pipe 250, during control, the valve port of the first control valve 300 can be switched to connect the first heat exchange pipe 151 connected to both ends of the first connecting pipe 240 and the underfloor heating 210, or to connect the first heat exchange pipe 151 connected to the first connecting pipe 240 and the second connecting pipe 250 and the water tank heat exchanger 230.

[0149] In some embodiments of this application, such as Figure 5 , 8 As shown, the water pipeline includes:

[0150] The third connecting pipe 260 has one end connected between the first heat exchange tube section 151 and the second heat exchange tube section 152, and the other end connected between the underfloor heating 210 and the first control valve 300. The second control valve 400 is provided on the third connecting pipe 260.

[0151] The above embodiments have the following advantages and effects:

[0152] By connecting the outlet of the second heat exchange tube section 152 and the third connecting pipe 260 between the underfloor heating 210 and the first control valve 300, part of the water flow after heat exchange through the second heat exchange tube section 152 can be diverted to the interior of the underfloor heating 210, so as to ensure that when the heat pump system is in the underfloor heating 210 water tank linkage operation mode, the water flow can flow in both the underfloor heating 210 and the water tank heat exchanger 230 at the same time.

[0153] In some embodiments of this application, such as Figure 5 , 8 As shown, the water pipeline includes:

[0154] The fourth connecting pipe 270 is connected between the water inlet end of the second heat exchange tube section 152 and the water outlet end of the water tank heat exchanger 230.

[0155] The fifth connecting pipe 280 is connected at one end to the water outlet of the underfloor heating 210 and at the other end to the fourth connecting pipe 270 between the second heat exchange pipe section 152 and the water tank heat exchanger 230.

[0156] An expansion tank 271 is installed on the fourth connecting pipe 270.

[0157] The above embodiments have the following advantages and effects:

[0158] The fifth connecting pipe 280 can be used to introduce the water flowing out of the underfloor heating 210 to the fourth connecting pipe 270. The fourth connecting pipe 270 can also introduce the water flowing out of the water tank heat exchanger 230 and the water flowing out of the underfloor heating 210 to the second heat exchange tube section 152. This allows the water to flow through the second heat exchange tube section 152 for heat exchange when the heat pump system is running in underfloor heating 210 mode, domestic hot water mode, or underfloor heating 210 water tank linkage mode.

[0159] In some embodiments of this application, such as Figure 3 As shown, the first heat exchange tube section 151 includes:

[0160] The first interface section 1511 is connected to the first connecting pipe 240;

[0161] Second interface section 1512.

[0162] The first interface section 1511 is the first water inlet interface, and the second interface section 1512 is the second water outlet interface.

[0163] The second heat exchange tube section 152 includes:

[0164] The third interface section 1521 is connected to the second interface section 1512 via a connecting pipe;

[0165] The fourth interface section 1522 is connected to the fourth connecting pipe 270.

[0166] The third interface section 1521 is the third water outlet interface, and the fourth interface section 1522 is the fourth water inlet interface.

[0167] The above embodiments have the following advantages and effects:

[0168] By configuring the first heat exchange tube section 151 to have two interfaces, a first interface section 1511 and a second interface section 1512, and the second heat exchange tube section 152 to have two interfaces, a third interface section 1521 and a fourth interface section 1522, the water-side heat exchange tube has four interfaces. When connected to the water pipeline, the two heat exchange tube sections can be connected to the water circulation loop separately for use, so that the entire heat pump unit can switch between multiple different operating modes.

[0169] In some embodiments of this application, such as Figure 3 As shown, the intermediate heat exchanger 150 includes:

[0170] The refrigerant-side heat exchange tube 153 is used for heat exchange with the water-side heat exchange tube. It has a first refrigerant interface 1531 and a second refrigerant interface 1532. The first refrigerant interface 1531 and the second refrigerant interface 1532 can be used to connect the refrigerant-side heat exchange tube 153 to the refrigerant circulation loop, so that the refrigerant can flow through the refrigerant-side heat exchange tube 153 to exchange heat with the water-side heat exchange tube.

[0171] The above embodiments have the following advantages and effects:

[0172] The two refrigerant interface sections provided at the refrigerant-side heat exchange pipe 153 can be used to connect with the refrigerant circulation loop, allowing refrigerant to be introduced into the refrigerant-side heat exchange pipe 153 for heat exchange with the water-side heat exchange pipe. The entire intermediate heat exchanger 150 has two refrigerant interface sections and four interface sections on the water-side heat exchange pipe, with a structure of 6 interface sections. This enables the interlocking operation of the underfloor heating 210 water tank with just one intermediate heat exchanger 150, reducing costs.

[0173] In some embodiments of this application, the first control valve 300 has a first valve port 310, a second valve port 320, and a third valve port 330;

[0174] The first valve port 310 and the second valve port 320 are respectively connected to the first connecting pipe 240;

[0175] The third valve port 330 is connected to the second connecting pipe 250;

[0176] When the first valve port 310 and the second valve port 320 are open, the first heat exchange tube 151 and the first connecting pipe 240 are also open.

[0177] When the first valve port 310 and the third valve port 330 are open, the first heat exchange tube 151 and the second connecting pipe 250 are open.

[0178] The first control valve 300 is an electric three-way valve, with the first valve port 310, the second valve port 320, and the third valve port 330 respectively provided on the first control valve 300 as the first valve port, the second valve port, and the third valve port.

[0179] The above embodiments have the following advantages and effects:

[0180] By having at least three valve ports—a first valve port 310, a second valve port 320, and a third valve port 330—and connecting these three valve ports to the first heat exchange tube section 151, the underfloor heating system 210, and the water tank heat exchanger 230 respectively, the water flow path can be switched by controlling the opening and closing of the three valve ports during use, thus ensuring that the system can operate in different modes.

[0181] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0182] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A heat pump system for combined underfloor heating and domestic hot water supply, characterized in that, Including: Refrigerant circulation loop: It is formed by connecting the compressor, the first air-side heat exchanger, the four-way valve, the second air-side heat exchanger and the intermediate heat exchanger through refrigerant pipelines; The intermediate heat exchanger includes a water-side heat exchange tube that exchanges heat with the refrigerant in the refrigerant circulation loop, and the water-side heat exchange tube includes a first heat exchange tube section and a second heat exchange tube section. Water circulation loop: It consists of underfloor heating, the first heat exchange pipe section, the second heat exchange pipe section, a water pump, and a water tank heat exchanger arranged in the water tank, which are connected by water pipes. The first heat exchange tube section has its outlet end connected to the inlet end of the underfloor heating system. The second heat exchange tube section has its outlet end connected to the inlet end of the first heat exchange tube section and the inlet end of the underfloor heating system, and its inlet end connected to the outlet end of the water tank heat exchanger and the outlet end of the underfloor heating system. The first control valve is connected to the first heat exchange tube section, the underfloor heating system, and the water tank heat exchanger. A controller is used to control the operation of the first control valve to connect the first heat exchange tube section to the underfloor heating system or the water tank heat exchanger. The heat pump system has a floor heating water tank linkage operation mode. When it is in the floor heating water tank linkage operation mode, the controller controls the first control valve to connect the first heat exchange tube section and the water tank heat exchanger. A domestic hot water circulation loop is formed between the first heat exchange tube section, the second heat exchange tube section, the first control valve, and the water tank heat exchanger. A first floor heating water circulation loop is formed between the floor heating system and the second heat exchange pipe section.

2. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 1, characterized in that, Including: The second control valve has one end connected between the first heat exchange tube section and the second heat exchange tube section, and the other end connected between the first control valve and the underfloor heating system. When the system is in the interlocking operation mode of the underfloor heating water tank, the controller controls the second control valve to open; The domestic hot water circulation loop is formed between the first heat exchange tube section, the second heat exchange tube section, the first control valve and the water tank heat exchanger; The first floor heating water circulation loop is formed between the floor heating system, the second heat exchange pipe section, and the second control valve.

3. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 2, characterized in that, The heat pump system has a floor heating mode. When the heat pump system is in floor heating mode, the controller controls the first control valve to connect the first heat exchange tube section to the floor heating system and controls the second control valve to close. A second floor heating water circulation loop is formed between the first heat exchange pipe section, the second heat exchange pipe section, the first control valve, and the floor heating room.

4. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 2, characterized in that, The heat pump system has a domestic hot water mode. When the heat pump system is in the domestic hot water mode, the controller controls the first control valve to connect the first heat exchange tube section to the water tank heat exchanger and controls the second control valve to close. The domestic hot water circulation loop is formed between the first heat exchange tube section, the second heat exchange tube section, the first control valve, and the water tank heat exchanger.

5. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 1, characterized in that, The water pipeline includes: The first connecting pipe is connected between the underfloor heating system and the first heat exchange pipe section; The second connecting pipe is connected at one end to the water tank heat exchanger and at the other end to the first connecting pipe. The first control valve is installed at the intersection of the second connecting pipe and the first connecting pipe.

6. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 2, characterized in that, The water pipeline includes: The third connecting pipe has one end connected between the first heat exchange tube section and the second heat exchange tube section, and the other end connected between the underfloor heating system and the first control valve. The second control valve is installed on the third connecting pipe.

7. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 5, characterized in that, The water pipeline includes: The fourth connecting pipe is connected between the second heat exchange tube section and the water tank heat exchanger; The fifth connecting pipe is connected at one end to the underfloor heating system and at the other end to the fourth connecting pipe between the second heat exchange pipe section and the water tank heat exchanger.

8. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 7, characterized in that, The first heat exchange tube section includes: The first interface section is connected to the first connecting pipe; Second interface section; The second heat exchange tube section includes: The third interface section is connected to the second interface section via a connecting pipe; The fourth interface section is connected to the fourth connecting pipe.

9. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 8, characterized in that, The intermediate heat exchanger includes: A refrigerant-side heat exchanger tube, used for heat exchange with the water-side heat exchanger tube, has a first refrigerant interface and a second refrigerant interface.

10. The heat pump system for combined underfloor heating and domestic hot water supply according to claim 5, characterized in that, The first control valve has: a first valve port, a second valve port, and a third valve port; The first valve port and the second valve port are respectively connected to the first connecting pipeline; The third valve port is connected to the second connecting pipe; When the first valve port and the second valve port are connected, the first heat exchange tube and the first connecting pipe are connected. When the first valve port and the third valve port are connected, the first heat exchange tube and the second connecting pipe are connected.

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