Defrosting module and heat pump system

Abstract

The utility model relates to a defrosting module and a heat pump system. The defrosting module comprises hot water equipment, an air conditioner side heat exchanger and a water-water heat exchanger, the water-water heat exchanger is connected with the hot water equipment to form a hot water circulation loop, and the water-water heat exchanger is further used for being connected with the tail end equipment and the air conditioner side heat exchanger through valves. In the defrosting mode, hot water in the hot water equipment circularly flows through the water-water heat exchanger, and the water-water heat exchanger is used for heating return water from the tail end equipment and then conveying the return water to the air conditioner side heat exchanger and the tail end equipment. The problems that heating cannot be conducted on the indoor side, cooling capacity of the air conditioner side heat exchanger cannot be discharged, and defrosting cannot be conducted on the outdoor side heat exchanger are solved, the cooling capacity of the air conditioner side heat exchanger can be absorbed during defrosting, heat is conveyed to the outdoor side heat exchanger, and meanwhile tail end equipment is heated.

Description

Technical Field

[0001] The present application relates to the field of defrosting technology, and in particular to a defrosting module and a heat pump system. Background Art

[0002] A heat pump is a device that uses the principle of heat transfer to transfer heat from a low-temperature heat source to a high-temperature heat source. Driven by electricity, a heat pump can obtain heat from the air and apply it to indoor terminal equipment, such as fan coil units, floor heating and other equipment for heating. Thus, one unit of electricity can be used to absorb 2-3 units of free heat from the outdoor environment, and then use this heat to heat water and apply it to the terminal equipment.

[0003] When the heat pump is defrosting in a low-temperature environment, it is easy to cause cold air to blow indoors. If the air-conditioning side heat exchanger and the terminal device in the heat pump system are disconnected, and hot water is supplied to the terminal device through other flow paths to keep the room in a heating state, the accumulated cold energy in the air-conditioning side heat exchanger (when defrosting, the air-conditioning side heat exchanger is used as an evaporator, which is equivalent to cooling) cannot be discharged, that is, the air-conditioning side heat exchanger has no heat source, and the outdoor side heat exchanger cannot be defrosted. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a defrost module and a heat pump system in view of the above-mentioned defects.

[0005] The technical solution adopted by the present application to solve the technical problem is: a defrosting module, comprising:

[0006] Hot water equipment;

[0007] Air conditioning side heat exchanger;

[0008] A water-to-water heat exchanger, the water-to-water heat exchanger is connected to the water heater to form a hot water circulation loop, and the water-to-water heat exchanger is also used to be connected to the terminal device and the air-conditioning side heat exchanger through valves respectively;

[0009] Among them, in the defrost mode, the hot water in the hot water device circulates through the water-to-water heat exchanger, and the water-to-water heat exchanger is used to heat the return water from the terminal device and then transport it to the air-conditioning side heat exchanger and the terminal device respectively.

[0010] In one embodiment, in the defrost module of the utility model, the defrost module further includes:

[0011] A first water pump is provided on a hot water circulation loop at an inlet end of the water-to-water heat exchanger to drive hot water to circulate through the water-to-water heat exchanger.

[0012] In one embodiment, in the defrost module of the utility model, the water-to-water heat exchanger includes a first water input port, a first water output port connected to the first water input port, a second water input port, and a second water output port connected to the second water input port;

[0013] The first water input port and the first water output port are connected to the hot water equipment to form a hot water circulation loop;

[0014] The second water input port is used to be connected to the water outlet of the terminal device, and the second water output port is connected to the water inlet of the terminal device and the air-conditioning side heat exchanger respectively through a valve.

[0015] In one of the embodiments, in the defrost module of the present invention, the water flow direction from the first water input port to the first water output port is opposite to the water flow direction from the second water input port to the second water output port.

[0016] In one embodiment, in the defrost module of the utility model, the air-conditioning side heat exchanger includes a third water input port and a third water output port connected to the third water input port;

[0017] The third water input port is connected to the second water output port of the water-to-water heat exchanger through a valve, and the third water output port is connected to the water inlet of the terminal device.

[0018] In one embodiment, in the defrost module described in the utility model, the valve includes a first valve port, a second valve port and a third valve port, the first valve port is connected to the second water output port, the third valve port is connected to the third water input port, and the second valve port is respectively connected to the third water output port and the water inlet of the terminal device; wherein, the first valve port is connected to the third valve port, and / or the first valve port is connected to the second valve port.

[0019] In one embodiment, in the defrost module of the utility model, the valve comprises:

[0020] a first flow regulating valve, which is disposed on the connecting pipeline between the second water outlet and the air-conditioning side heat exchanger and is used to regulate the flow of heated return water entering the air-conditioning side heat exchanger;

[0021] The second flow regulating valve is arranged on the pipeline connecting the second water output port and the water inlet of the terminal device, and the third water output port is connected to the water inlet of the terminal device.

[0022] In one of the embodiments, in the defrost module described in the utility model, the air-conditioning side heat exchanger also includes a first refrigerant interface and a second refrigerant interface connected to the first refrigerant interface.

[0023] In one embodiment, in the defrost module of the utility model, the hot water device is a domestic hot water tank; and / or

[0024] The water-to-water heat exchanger is a plate heat exchanger or a shell-and-tube heat exchanger.

[0025] The utility model also constructs a heat pump system, comprising:

[0026] Terminal equipment;

[0027] A second water pump, the second water pump is arranged on the connecting pipeline between the outlet of the terminal device and the water-to-water heat exchanger, driving the return water to circulate through the water-to-water heat exchanger;

[0028] An outdoor host, wherein the outdoor host comprises a defrost module as described in any one of the above items.

[0029] The implementation of the defrost module and heat pump system of the present application has the following beneficial effects: the present application adds a water-to-water heat exchanger between the hot water equipment and the air-conditioning side heat exchanger, and the water-to-water heat exchanger is connected to the terminal equipment and the air-conditioning side heat exchanger respectively through valves. During the defrosting process, the heat of the hot water in the domestic hot water tank is transferred to the terminal equipment and the air-conditioning side heat exchanger respectively through the water-to-water heat exchanger, thereby solving the problem that the indoor side cannot be heated, the cold energy of the air-conditioning side heat exchanger cannot be discharged, and the outdoor side heat exchanger cannot be defrosted. The application can absorb the cold energy of the air-conditioning side heat exchanger during defrosting, transport heat to the outdoor side heat exchanger and heat the terminal equipment at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0031] Figure 1 is a schematic diagram of a defrost module according to an embodiment of the present application;

[0032] Figure 2 yes Figure 1 Schematic diagram of fluid flow direction of the defrost module in non-defrost mode;

[0033] Figure 3 yes Figure 1 Schematic diagram of fluid flow direction of the defrost module in defrost mode;

[0034] Figure 4 is a schematic diagram of a defrost module according to another embodiment of the present application;

[0035] Figure 5 yes Figure 4Schematic diagram of fluid flow direction of the defrost module in non-defrost mode;

[0036] Figure 6 yes Figure 4 Schematic diagram of fluid flow direction of the defrost module in defrost mode;

[0037] Figure 7 is a schematic diagram of a heat pump system provided in an embodiment of the present application;

[0038] Figure 8 Schematic diagram of a heat pump system provided in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 1. Outdoor host; 2. Terminal equipment; 3. Second water pump; 11. Hot water equipment; 12. Water-to-water heat exchanger; 13. Air conditioning side heat exchanger; 14. First water pump; 15. Three-way valve; 16. First flow regulating valve; 17. Second flow regulating valve; 121. First water input port; 122. First water output port; 123. Second water output port; 124. Second water input port; 131. Third water input port, 132. Third water output port; 133. First refrigerant interface; 134. Second refrigerant interface; 4. Compressor; 5. Outdoor side heat exchanger; 6. Four-way valve; 7. Domestic hot water heat exchanger; 20. Throttling device; 21. First expansion mechanism; 23. Second expansion mechanism; 22. First solenoid valve; 24. Second solenoid valve; a. First valve port; b. Second valve port; c. Third valve port. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings.

[0042] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0043] In order to facilitate understanding of the present application, the present application will be described more comprehensively below. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0044] like Figure 1As shown, an embodiment of the present application discloses a defrost module, including a hot water device 11, an air-conditioning side heat exchanger 13, a first water pump 14, a water-to-water heat exchanger 12, and a valve or a valve group, as follows:

[0045] The water-to-water heat exchanger 12 is connected to the hot water device 11 to form a hot water circulation loop. The water-to-water heat exchanger 12 is also used to be connected to the terminal device 2 and the air-conditioning side heat exchanger 13 through a valve.

[0046] Among them, in the defrost mode, the hot water in the hot water device 11 circulates through the water-to-water heat exchanger 12, and the water-to-water heat exchanger 12 is used to heat the return water from the terminal device 2 and then transport it to the air-conditioning side heat exchanger 13 and the terminal device 2 respectively.

[0047] In this embodiment, a water-to-water heat exchanger 12 is added between the hot water device 11 and the air-conditioning side heat exchanger 13. The air-conditioning side heat exchanger 13 is connected to the terminal device 2 and the water-to-water heat exchanger 12 through a valve. The water-to-water heat exchanger 12 is connected to the terminal device 2 through a valve. During the defrosting process, the heat of the hot water of the hot water device 11 is transferred to the terminal device 2 and the air-conditioning side heat exchanger 13 through the water-to-water heat exchanger 12, thereby solving the problem that during defrosting, the indoor refrigeration and the cold of the air-conditioning side heat exchanger 13 cannot be discharged, and the outdoor heat exchanger cannot defrost.

[0048] Specifically, the first water pump 14 is disposed on the hot water circulation loop at the inlet end of the water-to-water heat exchanger 12 , and drives the hot water to circulate through the water-to-water heat exchanger 12 .

[0049] The water-to-water heat exchanger 12 includes a first water input port 121, a first water output port 122 connected to the first water input port 121, a second water input port 124, and a second water output port 123 connected to the second water input port 124. The first water input port 121 and the first water output port 122 are connected to the water heater 11 to form a hot water circulation loop. The second water input port 124 is used to be connected to the water outlet of the terminal device 2 through a pipeline, and the second water output port 123 is connected to the water inlet of the terminal device 2 and the air-conditioning side heat exchanger 13 through a valve.

[0050] In order to better transfer the heat of the hot water to the return water from the terminal device 2, the water flow direction from the first water input port 121 to the first water output port 122 is opposite to the water flow direction from the second water input port 124 to the second water output port 123. In some other embodiments, the water flow directions of the two paths may also be the same.

[0051] The air conditioning side heat exchanger 13 includes a third water input port 131 and a third water output port 132 connected to the third water input port 131, a first refrigerant interface 133 and a second refrigerant interface 134 connected to the first refrigerant interface 133 (such as Figure 7 shown).

[0052] The third water input port 131 is connected to the second water output port 123 of the water-to-water heat exchanger 12 through a valve, and the third water output port 132 is connected to the water inlet of the terminal device 2 through a pipeline.

[0053] In this embodiment, the terminal device 2 is a device arranged in a space and used to regulate the temperature of the space. For example, the terminal device 2 is specifically at least one of a fan coil unit, a floor heating pipe and a radiator. The hot water equipment 11 is specifically a domestic hot water tank. The heat pump system prepares domestic hot water in a mode and reserves hot water in the domestic hot water tank. The water-to-water heat exchanger 12 and the air-conditioning side heat exchanger 13 are specifically plate heat exchangers or shell-and-tube heat exchangers, which are not limited here.

[0054] In some embodiments, Figure 1 As shown, the valve includes a first valve port a, a second valve port b and a third valve port c, the first valve port a is connected to the second water output port 123, the third valve port c is connected to the third water input port 131, and the second valve port b is connected to the third water output port 132 and the water inlet of the terminal device 2 through pipelines. The first valve port a is connected to the third valve port c, and / or the first valve port a is connected to the second valve port b.

[0055] In this embodiment, the valve may be a three-way valve 15 . Of course, other multi-way valves may also be selected according to user requirements.

[0056] Figure 2 Shows Figure 1 Schematic diagram of fluid flow in non-defrost mode. In non-defrost mode, that is, when the heat pump system is in normal operation (including heating mode, domestic hot water mode, etc.), such as indoor heating in winter, the first water pump 14 is turned off, and the hot water circulation loop between the hot water equipment 11 and the water-to-water heat exchanger 12 is not started. The first valve port a is connected to the third valve port c, and the second valve port b is closed. The heat pump system prepares hot water through the air-conditioning side heat exchanger 13 (heating the return water of the terminal device 2 by heat exchange with the refrigerant), and the hot water prepared by the air-conditioning side heat exchanger 13 passes through the first valve port a and the third valve port c of the three-way valve 15 to flow the hot water through the pipeline to the terminal device 2, and circulates back and forth.

[0057] Figure 3 Shows Figure 1Schematic diagram of fluid flow in defrost mode. In defrost mode, the first water pump 14 is turned on. At this time, a hot water circulation loop is started between the hot water device 11 and the water-to-water heat exchanger 12. The three valve ports of the three-way valve 15 are all opened, that is, the first valve port a is connected to the third valve port c, and the first valve port a is connected to the second valve port b. The hot water device 11 flows hot water into the water-to-water heat exchanger 12 through the first water pump 14. The return water at the terminal device 2 replaces the heat of the hot water device 11 through the water-to-water heat exchanger 12 (the hot water flow path of the hot water device 11 and the return water flow path of the terminal device 2 exchange heat through the water-to-water heat exchanger 12). The return water flows through the second valve port b and the third valve port c through the first valve port a of the three-way valve 15 respectively. The return water after heat exchange coming out of the second valve port b enters the terminal device 2, and the return water after heat exchange coming out of the third valve port c enters the air-conditioning side heat exchanger 13. Since the air-conditioning side heat exchanger 13 is cooling during defrost, the return water after heat exchange can absorb the cooling capacity of the air-conditioning side heat exchanger 13.

[0058] As set above, the purpose of absorbing the cold of the air-conditioning side heat exchanger 13 and heating the terminal device 2 can be achieved during defrosting. In addition, by setting the three-way valve 15, the flow of the second valve port b and the third valve port c can be adjusted according to the heat required by the air-conditioning side heat exchanger 13 during the defrosting process, and only the required flow is provided to the air-conditioning side heat exchanger 13, and the remaining hot water is directly connected to the terminal device 2 through the second valve port b for heating, which can avoid all the hot water flowing in the air-conditioning side heat exchanger 13, thereby reducing the resistance loss caused by the long and complex pipelines inside the air-conditioning side heat exchanger 13, and improving the system operation energy efficiency.

[0059] In some embodiments, Figure 4 As shown, the valve includes a first flow regulating valve 16 and a second flow regulating valve 17. The first flow regulating valve 16 is provided on the connecting pipeline between the second water output port 123 and the air-conditioning side heat exchanger 13, and is used to adjust the flow of the heated return water entering the air-conditioning side heat exchanger 13. The second flow regulating valve 17 is provided on the connecting pipeline between the second water output port 123 and the water inlet of the terminal device 2, and the third water output port 132 is connected to the water inlet of the terminal device 2 through a pipeline.

[0060] Figure 5 Shows Figure 4 Schematic diagram of fluid flow in non-defrost mode. In non-defrost mode, that is, when the heat pump system is in normal operation (including heating mode, domestic hot water mode, etc.), such as indoor heating in winter, the first water pump 14 is turned off, and the hot water circulation loop between the hot water equipment 11 and the water-to-water heat exchanger 12 is not started. The second flow regulating valve 17 is closed, and the heat pump system prepares hot water through the air-conditioning side heat exchanger 13 (heating the return water of the terminal device 2 by heat exchange with the refrigerant). The hot water prepared by the air-conditioning side heat exchanger 13 passes through the first flow regulating valve 16 to flow the hot water through the pipeline to the terminal device 2, and circulates back and forth.

[0061] Figure 6 Shows Figure 4 Schematic diagram of fluid flow in defrost mode. In defrost mode, the first water pump 14 is turned on. At this time, a hot water circulation loop is started between the hot water device 11 and the water-to-water heat exchanger 12. The first flow regulating valve 16 and the second flow regulating valve 17 are turned on at the same time. The hot water device 11 flows hot water into the water-to-water heat exchanger 12 through the first water pump 14. The return water at the terminal device 2 replaces the heat of the hot water device 11 through the water-to-water heat exchanger 12 (the hot water flow path of the hot water device 11 and the return water flow path of the terminal device 2 perform heat exchange through the water-to-water heat exchanger 12), and enters the first flow regulating valve 16 and the second flow regulating valve 17. The return water after heat exchange coming out of the first flow regulating valve 16 enters the air-conditioning side heat exchanger 13, and the return water after heat exchange coming out of the second flow regulating valve 17 enters the terminal device 2. Since the air-conditioning side heat exchanger 13 is cooling during defrost, the return water after heat exchange can absorb the cooling capacity of the air-conditioning side heat exchanger 13. As configured above, the purpose of simultaneously absorbing the cold energy of the air-conditioning side heat exchanger 13 and heating the terminal device 2 can be achieved in the defrost mode.

[0062] Furthermore, the flow rates of the first flow regulating valve 16 and the second flow regulating valve 17 can be adjusted according to the heat required by the air-conditioning side heat exchanger 13 during the defrosting process. Only the required flow rate is provided to the air-conditioning side heat exchanger 13, and the remaining hot water is directly connected to the terminal device 2 for heating through the second flow regulating valve 17. This can prevent all the hot water from flowing in the air-conditioning side heat exchanger 13, thereby reducing the resistance loss caused by the longer and more complex pipelines inside the air-conditioning side heat exchanger 13, thereby improving the system operation energy efficiency.

[0063] In this embodiment, the flow entering the air-conditioning side heat exchanger 13 is adjusted by a valve, and only the water flow corresponding to the heat required for defrosting needs to be guaranteed. The terminal device 2 can be heated by the hot water device 11 at the same time, so that the terminal device 2 is still heating during defrosting, thereby improving the user experience. The pipeline pressure loss passing through the air-conditioning side heat exchanger 13 can also be further reduced, thereby achieving the purpose of saving the total water energy consumption and achieving energy-saving effects.

[0064] like Figure 7 As shown, an embodiment of the utility model discloses a heat pump system, including a terminal device 2, a second water pump 3 and an outdoor host 1, as follows:

[0065] The outdoor host 1 includes the defrost module described in the above embodiment, and the hot water device 11 is a domestic hot water tank. The water-to-water heat exchanger 12 is connected to the domestic hot water tank to form a hot water circulation loop. The second water pump 3 is arranged on the connecting pipeline between the outlet end of the terminal device 2 and the water-to-water heat exchanger 12, and drives the return water to circulate through the water-to-water heat exchanger 12, that is, the second water pump 3 transports the cold return water of the terminal device 2 to the water-to-water heat exchanger 12, and the air-conditioning side heat exchanger 13, the terminal device 2, the second water pump 3 and the water-to-water heat exchanger 12 connected in sequence form a water circulation loop. The third water output port 132 of the air-conditioning side heat exchanger 13 is connected to the water inlet of the terminal device 2, the water outlet of the terminal device 2 is connected to the inlet of the second water pump 3, the outlet of the second water pump 3 is connected to the second water input port 124 of the water-to-water heat exchanger 12, the second water output port 123 of the water-to-water heat exchanger 12 is connected to the third water input port 131 of the air-conditioning side heat exchanger 13 through a valve, and the second water output port 123 of the water-to-water heat exchanger 12 is also connected to the water inlet of the terminal device 2 through a valve.

[0066] In the defrost mode, the hot water in the hot water device 11 circulates through the water-to-water heat exchanger 12 , and the water-to-water heat exchanger 12 is used to heat the return water from the terminal device 2 and then transport it to the air-conditioning side heat exchanger 13 and the terminal device 2 .

[0067] Completely, as Figure 8 As shown, the outdoor host 1 also includes a compressor 4, a four-way valve 6, an outdoor heat exchanger 5 and a throttling device 20 (including a first expansion mechanism 21, a second expansion mechanism 23, a first solenoid valve 22 and a second solenoid valve 24). In the heating mode, the high-temperature refrigerant output by the compressor 4 enters the air-conditioning side heat exchanger 13 from the second refrigerant interface 134 after being reversed by the four-way valve 6 to release heat. At this time, the refrigerant and the circulating water (return water) in the terminal device 2 are heat exchanged in the air-conditioning side heat exchanger 13, and the reciprocating cycle is used to heat the terminal device 2. Then, the refrigerant after releasing heat flows out from the first refrigerant interface 133, passes through the throttling device 20, enters the outdoor heat exchanger 5 to absorb heat, and finally, the refrigerant after absorbing heat returns to the inlet of the compressor 4 after being reversed by the four-way valve 6 to complete the heating.

[0068] When the outdoor temperature is low, the outdoor heat exchanger 5 is prone to frost, so it is necessary to switch to the defrost mode, that is, adjust the four-way valve 6 to change the direction of the refrigerant during indoor cooling. The high-temperature refrigerant output by the compressor 4 enters the outdoor heat exchanger 5 after being reversed through the four-way valve 6. The outdoor heat exchanger 5 releases heat to defrost, and then the refrigerant after releasing heat passes through the throttling device 20 and enters the air-conditioning side heat exchanger 13 to absorb heat. At this time, it is necessary to rely on the air-conditioning side heat exchanger 13 to exchange heat with warm water. Finally, the refrigerant after absorbing heat returns to the inlet of the compressor 4 after being reversed through the four-way valve 6 to complete the defrosting.

[0069] In this embodiment, when switching to the defrost mode, the first water pump 14 is turned on to drive the hot water circulation loop. The high-temperature refrigerant output by the compressor 4 enters the outdoor heat exchanger 5 after being reversed through the four-way valve 6. The outdoor heat exchanger 5 releases heat to defrost, and then the refrigerant after releasing heat passes through the throttling device 20 and enters the air-conditioning side heat exchanger 13 to absorb heat. At this time, the water-to-water heat exchanger 12 heats the return water from the terminal device 2 by replacing the heat of the hot water of the hot water equipment 11 to achieve the effect of stabilizing the return water temperature. After heating, it is transported to the air-conditioning side heat exchanger 13 to exchange heat with the refrigerant. Finally, the refrigerant after absorbing heat returns to the inlet of the compressor 4 after being reversed through the four-way valve 6 to complete the defrosting.

[0070] Moreover, the water flow rate flowing through the valve can be adjusted by adjusting the valve opening according to the heat required by the air-conditioning side heat exchanger 13 during the defrosting process. Only the required flow rate is provided to the air-conditioning side heat exchanger 13, and the remaining hot water is directly connected to the terminal device 2 through the valve for heating. This can avoid all the hot water flowing in the air-conditioning side heat exchanger 13, thereby reducing the resistance loss caused by the longer and more complex pipelines inside the air-conditioning side heat exchanger 13, and improving the system operation energy efficiency.

[0071] In this embodiment, a water-to-water heat exchanger 12 is added between the hot water device 11 and the air-conditioning side heat exchanger 13. The air-conditioning side heat exchanger 13 is connected to the terminal device 2 and the water-to-water heat exchanger 12 through a valve. The water-to-water heat exchanger 12 is connected to the terminal device 2 through a valve. During the defrosting process, the heat of the hot water of the hot water device 11 is transferred to the terminal device 2 and the air-conditioning side heat exchanger 13 through the water-to-water heat exchanger 12, thereby solving the problem that the indoor refrigeration and the cold capacity of the air-conditioning side heat exchanger 13 cannot be discharged during defrosting, and heat is transported to the outdoor heat exchanger and the terminal device is heated at the same time.

[0072] It can be understood that the above embodiments only express the preferred implementation methods of the present application, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present application; therefore, all equivalent changes and modifications made to the scope of the claims of the present application should belong to the scope covered by the claims of the present application.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0075] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A defrost module, characterized in that: include: Hot water equipment (11); Air conditioning side heat exchanger (13); A water-to-water heat exchanger (12), the water-to-water heat exchanger (12) being connected to the water heating device (11) to form a hot water circulation loop, and the water-to-water heat exchanger (12) being further used to be connected to the terminal device (2) and the air conditioning side heat exchanger (13) respectively through valves; Wherein, in the defrost mode, the hot water in the hot water device (11) circulates through the water-to-water heat exchanger (12), and the water-to-water heat exchanger (12) is used to heat the return water from the terminal device (2) and then transport it to the air-conditioning side heat exchanger (13) and the terminal device (2) respectively.

2. The defrost module according to claim 1, characterized in that: The defrost module also includes: A first water pump (14), wherein the first water pump (14) is arranged on a hot water circulation loop at an inlet end of the water-to-water heat exchanger (12), and drives the hot water to circulate through the water-to-water heat exchanger (12).

3. The defrost module according to claim 1, characterized in that: The water-to-water heat exchanger (12) comprises a first water input port (121), a first water output port (122) connected to the first water input port (121), a second water input port (124), and a second water output port (123) connected to the second water input port (124); The first water input port (121) and the first water output port (122) are connected to the hot water device (11) to form a hot water circulation loop; The second water input port (124) is used to be connected to the water outlet of the terminal device (2), and the second water output port (123) is connected to the water inlet of the terminal device (2) and the air-conditioning side heat exchanger (13) respectively through a valve.

4. The defrost module according to claim 3, characterized in that: The direction of water flow from the first water input port (121) to the first water output port (122) is opposite to the direction of water flow from the second water input port (124) to the second water output port (123).

5. The defrost module according to claim 3, characterized in that: The air-conditioning side heat exchanger (13) comprises a third water input port (131) and a third water output port (132) connected to the third water input port (131); The third water input port (131) is connected to the second water output port (123) of the water-to-water heat exchanger (12) via a valve, and the third water output port (132) is connected to the water inlet of the terminal device (2).

6. The defrost module according to claim 5, characterized in that: The valve comprises a first valve port (a), a second valve port (b) and a third valve port (c); the first valve port (a) is connected to the second water output port (123), the third valve port (c) is connected to the third water input port (131), and the second valve port (b) is respectively connected to the third water output port (132) and the water inlet of the terminal device (2); wherein the first valve port (a) is in communication with the third valve port (c), and / or the first valve port (a) is in communication with the second valve port (b).

7. The defrost module according to claim 5, characterized in that: The valve comprises: a first flow regulating valve (16), the first flow regulating valve (16) being arranged on the connecting pipeline between the second water outlet (123) and the air-conditioning side heat exchanger (13), and being used for regulating the flow of the heated return water entering the air-conditioning side heat exchanger (13); A second flow regulating valve (17), wherein the second flow regulating valve (17) is arranged on a pipeline connecting the second water output port (123) and the water inlet of the terminal device (2), and the third water output port (132) is connected to the water inlet of the terminal device (2).

8. The defrost module according to any one of claims 1 to 7, characterized in that: The air-conditioning side heat exchanger (13) further comprises a first refrigerant interface (133) and a second refrigerant interface (134) connected to the first refrigerant interface (133).

9. The defrost module according to claim 1, characterized in that: The hot water device (11) is a domestic hot water tank; and / or The water-to-water heat exchanger (12) is a plate heat exchanger or a shell-and-tube heat exchanger.

10. A heat pump system, characterized in that: include: Terminal equipment (2); a second water pump (3), the second water pump (3) being arranged on a connecting pipeline between an outlet of the terminal device (2) and the water-to-water heat exchanger (12), and driving return water to circulate through the water-to-water heat exchanger (12); An outdoor host (1), the outdoor host (1) comprising a defrost module according to any one of claims 1 to 9.

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