Heat pump unit

Abstract

The utility model discloses a heat pump unit, which comprises a refrigerant loop and a heat pump loop, a water circulation loop; the user water pipe group is connected with the water terminal group; the water mixing pipeline group is connected with the water tank, the water supply source and the user water pipe group and used for mixing hot water of the water tank and cold water of the water supply source and then conveying the mixture to the water terminal group at the joint of the user water pipe group; the water mixing control valve group is arranged on the water mixing pipeline group; the sterilization pipeline is connected between the user water pipe group and the water tank, and a sterilization control valve is arranged on the sterilization pipeline; the heat pump unit comprises a sterilization mode and a water mixing mode; in a sterilization mode, the water mixing control valve group is closed, the sterilization control valve is opened, and the sterilization pipeline is conducted; in the water mixing mode, the water mixing control valve group is opened, the water mixing pipeline group is conducted, the control valve is closed, and the sterilization pipeline is disconnected. The heat pump unit provided by the utility model not only can reduce the temperature of hot water of a water terminal of a user and prevent the user from being scalded, but also can perform thermal sterilization and ensure health and safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump technical field, concretely relates to an improvement of heat pump unit structure. BACKGROUND

[0002] The heat pump unit is connected with the heat exchange coil in the water tank through the water side heat exchanger to form a water circulation loop during use, and the water flow flows in the water circulation loop, exchanges heat with the refrigerant of the unit at the water side heat exchanger when flowing through the water side heat exchanger, and flows to the heat exchange coil after heat exchange to exchange heat with the water in the water tank through the heat exchange coil to heat the water in the water tank.

[0003] The hot water in the water tank is mainly stored in the water tank during non-use, and the hot water stored in the water tank is released during use at the user terminal.

[0004] Legionella pneumophila is prone to be produced in the water storage type hot water system, in order to eliminate Legionella pneumophila and prevent diseases, the temperature of the stored water needs to be kept above at least 60 DEG C to realize thermal sterilization, because bacteria are difficult to survive above this temperature.

[0005] However, directly sending 60 DEG C water to the water use terminal of the user can cause serious scalding, and 60 DEG C water can cause local scalding within 5 seconds, and the scalding time is shorter for the old or children.

[0006] If the temperature of the stored water in the water tank is adjusted to be lower, Legionella pneumophila can be produced due to the too low water temperature, and a safety hazard can be caused to the health of the user. INVENTION CONTENTS

[0007] In view of the problems in the background art, a heat pump unit is provided, which can reduce the hot water temperature of the water use terminal of the user, avoid scalding the user, and perform thermal sterilization to ensure health and safety.

[0008] A heat pump unit comprises:

[0009] A refrigerant circuit circulates refrigerant in a compressor, an air side heat exchanger, an expansion valve and a water side heat exchanger;

[0010] A water circulation loop is formed by connecting the water side heat exchanger and the heat exchange coil in the water tank, and the water in the water tank can exchange heat with the water in the heat exchange coil;

[0011] A user water pipe group is connected with the water use terminal group;

[0012] A water mixing pipe group is connected with the water tank, a water source and the user water pipe group, and is used for mixing the hot water of the water tank and the cold water of the water source and then conveying the mixed water to the water use terminal group at the connection position of the user water pipe group;

[0013] The water mixing control valve group is arranged on the water mixing pipeline group and is used for controlling the on-off of the water mixing pipeline group.

[0014] The sterilization pipeline is connected between the user water pipe group and the water tank, and a sterilization control valve for controlling the on-off of the sterilization pipeline is arranged on the sterilization pipeline.

[0015] The heat pump unit comprises a sterilization mode and a water mixing mode.

[0016] When the heat pump unit is in the sterilization mode, the water mixing control valve group is closed, the water mixing pipeline group is disconnected, the control valve is opened, and the sterilization pipeline is conducted.

[0017] When the heat pump unit is in the water mixing mode, the water mixing control valve group is opened, the water mixing pipeline group is conducted, the control valve is closed, and the sterilization pipeline is disconnected.

[0018] The above embodiment has the following advantages and effects:

[0019] The heat pump unit is provided with the water mixing pipeline group and the sterilization pipeline. When it is required to supply mixed water with low temperature to the water terminal, the sterilization pipeline is disconnected, the water mixing control valve group is opened, and the water mixing pipeline group is conducted, so that the hot water in the water tank and the cold water from the water supply source flow through the water mixing pipeline group and are then delivered to the water terminal to supply mixed water. The mixed water is obtained by mixing the cold water from the water supply source and the hot water in the water tank, so that the temperature of the water delivered to the water terminal is ensured to be not too high to cause scalding.

[0020] When it is required to perform sterilization by using hot water to the water terminal group, the water mixing control valve group and the water mixing pipeline group are closed, the sterilization control valve and the sterilization pipeline are opened, and the high-temperature hot water in the water tank is delivered to the user water pipe group and the water terminal group through the sterilization pipeline to perform sterilization. In this way, the water with appropriate temperature can be delivered to the user, the scalding of the user is avoided, and the sterilization effect of the user water pipe group and the water terminal group is ensured, so that the health and safety are ensured.

[0021] In some embodiments of the present application, the water mixing pipeline group comprises:

[0022] The water supply pipeline is connected with an external water supply source.

[0023] The water tank outlet pipeline is connected with the water outlet of the water tank and is connected with the water supply pipeline.

[0024] The mixed water outlet pipeline is connected between the connection position of the water supply pipeline and the water tank outlet pipeline and the user water pipe group and is used for delivering the mixed water to the user water pipe group.

[0025] The above embodiment has the following advantages and effects:

[0026] The water outlet pipe of the water tank is connected with the water outlet part, so that the hot water in the water tank can enter the water outlet pipe of the water tank, the water outlet pipe of the water tank is connected with the water supply pipe, the hot water in the water outlet pipe of the water tank and the cold water in the water supply pipe are mixed, and the mixed cold and hot water is delivered to the user water pipe group and then to each water terminal.

[0027] In some embodiments of the present application, the water tank is provided with two water outlet parts, and the sterilization pipe and the water outlet pipe of the water tank are respectively connected to the two water outlet parts.

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

[0029] The two water outlet parts provided on the water tank can make the sterilization pipe and the water outlet pipe of the water tank connected in parallel on the water tank, and in use, the user can open the sterilization pipe alone for sterilization according to the use demand, or open the water outlet pipe of the water tank for forming mixed water, and the sterilization pipe and the water outlet pipe of the water tank will not interfere with each other.

[0030] In some embodiments of the present application, the water outlet pipe of the water tank comprises a first water outlet pipe connected with the water tank;

[0031] and a second water outlet pipe connected with the first water outlet pipe and connected with the water supply pipe;

[0032] The sterilization pipe is connected at one end with the first water outlet pipe and at one end with the user water pipe group;

[0033] The water mixing control valve group comprises:

[0034] A water supply control valve arranged on the water supply pipe and used for controlling the on-off of the water supply pipe;

[0035] A water mixing control valve connected at the connection between the water supply pipe and the second water outlet pipe and used for mixing the water flow from the water supply pipe and the water tank and controlling the on-off of the second water outlet pipe;

[0036] When the heat pump unit is in the sterilization mode, the water supply control valve and the water mixing control valve are closed, and the sterilization control valve is opened.

[0037] When the heat pump unit is in the water mixing mode, the water supply control valve and the water mixing control valve are opened, and the sterilization control valve is closed.

[0038] The above embodiments have the following advantages and effects:

[0039] By setting the water tank outlet pipe as a first outlet pipe and a second outlet pipe, and connecting a bypass sterilization pipe on the first outlet pipe, in use, the user can control the water flowing out of the first outlet pipe to mix with the water of the water supply pipe through the second outlet pipe or not to flow through the second outlet pipe but directly through the sterilization pipe to the user water pipe group for heat sterilization according to the actual use demand, which takes into account the mixed water and sterilization, that is, ensures that the mixed water temperature will not scald the user and ensures that sterilization can be performed, ensuring the health and safety of use.

[0040] In some embodiments of the present application, the water tank outlet pipe comprises:

[0041] The first outlet pipe is connected with the water tank;

[0042] The second outlet pipe connected with the first outlet pipe is connected with the water supply pipe;

[0043] The sterilization pipe has one end connected with the first outlet pipe and one end connected with the user water pipe group;

[0044] The water mixing control valve group comprises:

[0045] The first control valve is arranged on the water supply pipe and is used to control the opening and closing of the first water supply pipe;

[0046] The second control valve is arranged on the second outlet pipe and is used to control the opening and closing of the second outlet pipe;

[0047] When the heat pump unit is in the sterilization mode, the first control valve and the second control valve are closed, and the sterilization control valve is opened;

[0048] When the heat pump unit is in the water mixing mode, the first control valve and the second control valve are opened, and the sterilization control valve is closed.

[0049] The above embodiments have the following advantages and effects:

[0050] The water mixing control valve group is set as the first control valve and the second control valve in cooperation, which can realize the opening and closing control of the second outlet pipe for water mixing and the water supply pipe;

[0051] Through the switching control between the first control valve, the second control valve and the sterilization control valve, the control of the second outlet pipe connected with the first outlet pipe and the sterilization pipe is realized, and the switching control of the mixed water mode and the sterilization mode is realized.

[0052] In some embodiments of the present application, the water tank comprises: a water inlet part in communication with the internal space of the water tank;

[0053] The water supply pipeline is connected with the water inlet part of the water tank, and a one-way valve, a stop valve and a pressure reducing valve are arranged on the water supply pipeline.

[0054] The above embodiment has the following advantages and effects:

[0055] The water supply pipeline connected with the tap water supply source is provided with a stop valve, a pressure reducing valve and a one-way valve, and the water tank is automatically filled with water by controlling the above valves, so that the water amount in the water tank is sufficient and the water pressure is maintained constant.

[0056] In some embodiments of the present application, the water supply pipeline comprises:

[0057] The first water supply pipeline is connected with the water supply source, and a one-way valve, a stop valve and the pressure reducing valve are arranged on the first water supply pipeline;

[0058] The second water supply pipeline is connected with the first water supply pipeline and the second water outlet pipeline;

[0059] The third water supply pipeline is connected with the first water supply pipeline and the water inlet part of the water tank.

[0060] The above embodiment has the following advantages and effects:

[0061] The first water supply pipeline is connected to the water supply source such as a tap water supply source, and water can be delivered to the third water supply pipeline through the first water supply pipeline to supply water to the inside of the water tank;

[0062] The second water supply pipeline and the second water outlet pipeline are connected, and can be used to mix with the second water outlet pipeline to make mixed water.

[0063] In some embodiments of the present application, the heat pump unit comprises:

[0064] The connecting pipe group is connected between the first water supply pipeline and the water terminal group, and the connection position of the connecting pipe group with the first water supply pipeline is closer to the water supply source than that of the second water supply pipeline;

[0065] The control component is arranged on the connecting pipe group and used to control the on-off of the connecting pipe group.

[0066] The above embodiment has the following advantages and effects:

[0067] The connecting pipe group arranged between the water terminal group and the first water supply pipeline can make the user directly deliver cold water to the water terminal through the connecting pipe group for cold water supply by opening the control component when using the water supply source through the first water supply pipeline, so that the cold water supply mode is realized.

[0068] In some embodiments of the present application, the water mixing control valve comprises:

[0069] a valve body, a containing space and a mixed water outlet are formed in the valve body;

[0070] a thermal sensitive element is assembled in the containing space, which can expand when heated and contract when cooled;

[0071] a sliding member is arranged in the valve body and connected with the thermal sensitive element, a hot water inlet and a cold water inlet are formed between the sliding member and the valve body;

[0072] a setting knob is screwed in the valve body and abuts against the thermal sensitive element;

[0073] a resilient assembly is arranged between the thermal sensitive element and the valve body, which is used to apply a resilient force to the thermal sensitive element when the thermal sensitive element expands or contracts;

[0074] when the setting knob is rotated relative to the valve body, the setting knob applies a force to the thermal sensitive element to drive the sliding member to move relative to the valve body to change the sizes of the hot water inlet and the cold water inlet;

[0075] when the thermal sensitive element expands or contracts, the sliding member is driven to move relative to the valve body to adjust the sizes of the hot water inlet and the cold water inlet.

[0076] The above embodiment has the following advantages and effects:

[0077] when the mixed water control valve is used, the setting knob can be rotated to drive the thermal sensitive element to move and drive the sliding member to change the sizes of the hot water inlet and the cold water inlet formed between the valve body, so as to set the outlet water temperature of the mixed water;

[0078] Meanwhile, the thermal sensitive element built in the valve body can also expand when heated or contract when cooled when the outlet water temperature of the mixed water outlet is different from the set outlet water temperature, to drive the sliding member to move and automatically adjust the sizes of the hot water inlet and the cold water inlet, so as to automatically adjust the water temperature to reach the set outlet water temperature, thereby ensuring constant temperature outlet water.

[0079] In some embodiments of the present application, the valve body comprises a valve body;

[0080] a first extension is connected to the valve body, a first water guiding space is formed in the first extension, a hot water inlet is formed between the first extension and the end of the sliding member close to the mixed water outlet, and the hot water inlet is communicated with the first water guiding space;

[0081] a second extension is connected to the valve body, a second water guiding space is formed in the second extension, a cold water inlet is formed between the second extension and the end of the sliding member away from the mixed water outlet, and the cold water inlet is communicated with the second water guiding space.

[0082] The above embodiment has the following advantages and effects:

[0083] The hot water inlet part is formed between the end of the sliding part close to the mixed water outlet part and the first extension part, and the cold water inlet part is formed between the end of the sliding part far from the mixed water outlet part and the second extension part.

[0084] When the sliding part is driven by the thermal element to move away from the mixed water outlet part, the hot water inlet part becomes larger and the cold water inlet part becomes smaller, and vice versa, so that the mixed water temperature is adjusted by changing the sizes of the two inlet parts.

[0085] Other features and advantages of the present application will become more apparent after reading the detailed description of the preferred embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0086] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other accompanying drawings can also be obtained by those skilled in the art without creative labor.

[0087] Figure 1 is a structural schematic view of a heat pump unit according to the embodiment;

[0088] Figure 2 is a water flow direction schematic view of the heat pump unit according to the embodiment in the mixed water mode;

[0089] Figure 3 is a water flow direction schematic view of the heat pump unit according to the embodiment in the sterilization mode;

[0090] Figure 4 is a water flow direction schematic view of the heat pump unit according to the embodiment in the mixed water mode and the cold water re-mixing on the water supply pipeline;

[0091] Figure 5 is a water flow direction schematic view of the heat pump unit according to the embodiment in which the water supply pipeline is used for supplying cold water to the water terminal group;

[0092] Figure 6 is a water flow direction schematic view of the heat pump unit according to the embodiment in which the water supply pipeline is used for water replenishment of the water tank;

[0093] Figure 7 is a structural schematic view of the mixed water control valve of the heat pump unit according to the embodiment in a certain set water temperature;

[0094] Figure 8Structure diagram of a water mixing control valve of a heat pump unit according to an embodiment when another set water temperature is set;

[0095] Figure 9 Structure diagram of a water mixing control valve of a heat pump unit according to an embodiment when another set water temperature is set;

[0096] Figure 10 Flow chart of operation steps of sterilization of a heat pump unit according to an embodiment.

[0097] Reference signs:

[0098] 100, refrigerant circuit; 110, compressor; 120, air-side heat exchanger; 130, water-side heat exchanger; 200, water circulation circuit; 210, water tank; 211, water inlet part; 212, water outlet part; 220, heat exchange coil; 310, user water pipe group; 311, user water sub-pipe; 400, water terminal group; 410, water terminal; 500, water mixing pipe group; 510, water supply pipe; 511, one-way valve; 512, stop valve; 513, pressure reducing valve; 514, first water supply pipe; 515, second water supply pipe; 516, third water supply pipe; 520, water tank water outlet pipe; 521, first water outlet pipe; 522, second water outlet pipe; 530, mixed water outlet pipe; 610, water supply control valve; 620, water mixing control valve; 630, first control valve; 640, second control valve; 700, sterilization pipe; 710, sterilization control valve; 810, main connection pipe; 820, shunt pipe; 910, valve body; 911, mixed water outlet part; 912, valve body; 913, first extension part; 9131, first water guide space; 914, second extension part; 9141, second water guide space; 9142, extension protrusion; 915, first cavity wall; 916, second cavity wall; 920, thermal element; 921, protrusion part; 930, slider; 931, sliding protrusion; 940, hot water inlet part; 950, cold water inlet part; 960, setting knob; 971, first elastic part; 972, second elastic part; 980, guide cylinder. DETAILED DESCRIPTION

[0099] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For the sake of simplicity, the description below of the specific examples will not be exhaustive of the disclosure. Indeed, the present application can be practiced in a variety of ways. Accordingly, other embodiments and examples of the present application will be suggested to those skilled in the art by this disclosure. Further, this disclosure provides examples of various specific processes and materials. However, one skilled in the art will recognize that other processes and / or materials can be used.

[0105] In some embodiments of the present application, a heat pump unit is proposed, comprising:

[0106] A refrigerant circuit 100 circulates refrigerant in a compressor 110, an air-side heat exchanger 120, an expansion valve, and a water-side heat exchanger 130.

[0107] The water-side heat exchanger 130 is a plate heat exchanger.

[0108] The heat pump unit in the present application performs a cycle by using the compressor 110, the air-side heat exchanger 120, the expansion valve, and the water-side heat exchanger 130.

[0109] The cycle process includes a series of processes involving compression, condensation, expansion, and evaporation.

[0110] Low-temperature and low-pressure refrigerant enters the compressor 110, which compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the water-side heat exchanger 130. The water-side heat exchanger 130 condenses the compressed refrigerant into a liquid phase and releases heat.

[0111] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant formed in the condenser into low-pressure liquid-phase refrigerant. The air-side heat exchanger 120 evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 110.

[0112] The air-side heat exchanger 120 can achieve a refrigeration effect by exchanging heat with the material to be cooled using the latent heat of evaporation of the refrigerant.

[0113] A water circulation circuit 200 is formed by connecting the water-side heat exchanger 130 and the heat exchange coil 220 in the water tank 210, and the water in the water tank 210 can exchange heat with the water in the heat exchange coil 220.

[0114] The water flow in the water circulation circuit 200 circulates between the water-side heat exchanger 130 and the heat exchange coil 220.

[0115] To drive the flow of water flow, the water circulation loop 200 is also provided with a corresponding pumping device.

[0116] The water flow in the water circulation loop 200, when it flows to the water side heat exchanger 130 position, will exchange heat with the refrigerant flowing through the water side heat exchanger 130, the refrigerant releases heat, and the water flow absorbs the heat released by the refrigerant, the temperature rises.

[0117] The water flow that absorbs the heat of the refrigerant will flow into the heat exchange coil 220 of the water tank 210, and the water in the heat exchange coil 220 exchanges heat with the water in the water tank 210, the water in the heat exchange coil 220 releases heat, and the water in the water tank 210 absorbs heat, the water in the water tank 210 is heated by the heat exchange coil 220 to achieve the effect of supplying hot water to the user terminal.

[0118] In some embodiments of the present application, the heat pump unit comprises: a user water pipe group 310 connected with the water terminal group 400, the user water pipe group 310 is connected with the water terminal group 400 to transport water to the user terminal group.

[0119] The user water pipe group 310 comprises a plurality of user water sub-pipes 311, and the water terminal group 400 comprises a plurality of water terminals 410.

[0120] The plurality of user water sub-pipes 311 are respectively connected with the plurality of water terminals 410 to respectively transport water to the plurality of water terminals 410.

[0121] In some embodiments of the present application, the heat pump unit comprises:

[0122] The water mixing pipe group 500 is connected with the water tank 210, the water source and the user water pipe group 310, and is used for mixing the hot water of the water tank 210 and the cold water of the water source and then transporting to the water terminal group 400 connected with the user water pipe group 310;

[0123] The water mixing control valve group is arranged on the water mixing pipe group 500 and is used for controlling the on-off of the water mixing pipe group 500.

[0124] The water mixing pipe group 500 is connected with the water tank 210, which can ensure that the hot water produced in the water tank 210 can be transported into it. It is connected with the water source, which can ensure that the external cold water can be transported into it, thereby ensuring that the hot water and the cold water can be mixed in it to form the user terminal water with a suitable temperature, and the mixed water is transported to the user terminal group position through the user water pipe group 310.

[0125] In use, the water mixing pipeline is controlled by the water mixing control valve group, when the water mixing pipeline group 500 is disconnected, the mixed water is not provided to the user, and when the water mixing control valve group is turned on, the water mixing pipeline group 500 can normally supply mixed water to the user terminal group.

[0126] In some embodiments of the present application, the heat pump unit comprises:

[0127] The sterilization pipeline 700 is connected between the user water pipe group and the water tank 210, and the sterilization control valve 710 for controlling the on-off of the sterilization pipeline 700 is arranged on the sterilization pipeline 700.

[0128] The on-off of the sterilization pipeline 700 can be controlled by the sterilization control valve 710, when heat sterilization is needed, the sterilization control valve 710 can be opened, so that the sterilization pipeline 700 connected between the user water pipe group and the water tank 210 is turned on.

[0129] After the sterilization pipeline 700 is turned on, the high-temperature hot water in the water tank 210 can be transported to the position of the water terminal group 400 connected to the user water pipe group through the sterilization pipeline 700, so as to heat the multiple water terminals 410 through the high-temperature hot water to achieve the sterilization effect.

[0130] When heat sterilization is not needed, the sterilization control valve 710 can be closed, and the sterilization pipeline 700 is disconnected.

[0131] In some embodiments of the present application, the sterilization control valve 710 is an electromagnetic valve.

[0132] The heat pump unit comprises a sterilization mode and a water mixing mode;

[0133] When in the sterilization mode, the water mixing control valve group is closed, the water mixing pipeline group 500 is disconnected, the control valve is opened, and the sterilization pipeline 700 is turned on;

[0134] When in the water mixing mode, the water mixing control valve group is opened, the water mixing pipeline group 500 is turned on, the control valve is closed, and the sterilization pipeline 700 is disconnected.

[0135] In the heat pump unit of the present embodiment, the mixed water pipe group and the sterilization pipeline 700 are provided, when mixed water with low temperature is needed to be supplied to the water terminal 410, the sterilization pipeline 700 is disconnected, the water mixing control valve group is opened, and the water mixing pipeline group 500 is turned on, so that the hot water in the water tank 210 and the cold water from the water supply source flow through the mixed water pipe group and then are transported to the position of the water terminal 410 for mixed water supply, through the mixing of the cold water from the supply source and the hot water in the water tank 210, the temperature of the water transported to the water terminal 410 is ensured, so that the user will not be scalded.

[0136] When it is necessary to perform thermal sterilization on the water terminal set 400, the water mixing control valve set and the water mixing pipeline set 500 can be closed, and the sterilization control valve 710 and the sterilization pipeline 700 are opened. At this time, the high-temperature hot water in the water tank 210 is delivered to each user water pipe set 310 and the water terminal set 400 through the sterilization pipeline 700, so as to perform high-temperature sterilization on the user water pipe set 310 and the water terminal set 400, that is, to ensure that the user can be delivered with water of appropriate temperature, to avoid scalding of the user, and to ensure the sterilization effect on the user water pipe set and the water terminal set 400, to ensure the health and safety.

[0137] In some embodiments of the present application, the water mixing pipeline set 500 comprises:

[0138] The water supply pipeline 510 is connected with an external water supply source.

[0139] The external water supply source can be connected with a tap water source or an external water tank 210, etc. The internal part is cold water, which can deliver cold water into the water supply pipeline 510.

[0140] In some embodiments of the present application, the water mixing pipeline set 500 comprises:

[0141] The water tank outlet pipeline 520 is connected with the water outlet 212 of the water tank 210, and is connected with the water supply pipeline 510.

[0142] The water outlet 212 is a water outlet provided on the water tank 210. The water tank outlet pipeline 520 and the water outlet 212 are connected, so that the hot water in the water tank 210 enters the water tank outlet pipeline 520, and the water tank outlet pipeline 520 mixes the hot water in the water tank outlet pipeline 520 and the cold water in the water supply pipeline 510 through the water supply pipeline 510.

[0143] The mixed outlet pipeline 530 is connected between the water supply pipeline 510 and the water tank outlet pipeline 520 and the user water pipe set 310, and is used for delivering the mixed water flow to the user water pipe set 310.

[0144] The mixed outlet pipeline 530 delivers the mixed cold and hot water to the user water pipe set 310 and then to each water terminal 410.

[0145] In some embodiments of the present application, the water tank 210 is provided with two water outlets 212, and the sterilization pipeline 700 is connected with the two water tank outlet pipelines 520 and the two water outlets 212.

[0146] When it is necessary to perform thermal sterilization, the sterilization control valve 710 can be opened, and the hot water in the water tank 210 enters the user water pipe set 310 and the water terminal set 400 through the sterilization pipeline 700, so as to perform sterilization on the user water pipe set 310 and the water terminal set 400.

[0147] When mixed water is needed, the sterilization control valve 710 is closed, the mixed water control valve group is opened, and the water in the water tank 210 is mixed through the water tank outlet pipeline 520 and the water supply pipeline 510, and then flows through the mixed water outlet pipeline 530 to the user water tank group and the water terminal group 400.

[0148] The above embodiment has the following advantages and effects:

[0149] The two water outlet portions 212 provided on the water tank 210 can make the sterilization pipeline 700 and the water tank outlet pipeline 520 connected in parallel on the water tank 210. In use, the user can open the sterilization pipeline 700 alone according to the use requirement to sterilize, or open the water tank outlet pipeline 520 to form mixed water. The sterilization pipeline 700 and the water tank outlet pipeline 520 do not interfere with each other.

[0150] In some embodiments of the present application, the water tank outlet pipeline 520 includes a first outlet pipeline 521 connected with the water tank 210;

[0151] and a second outlet pipeline 522 connected with the first outlet pipeline 521 and connected with the water supply pipeline 510.

[0152] In some embodiments of the present application, the water supply pipeline 510 includes a first water supply pipeline 514 and a second water supply pipeline 515. The first water supply pipeline 514 is connected with the water supply source, and the second water supply pipeline 515 is connected with the second outlet pipeline 522.

[0153] The sterilization pipeline 700 has one end connected with the first outlet pipeline 521 and one end connected with the user water pipeline group 310.

[0154] In some embodiments of the present application, the mixed water control valve group includes:

[0155] The water supply control valve 610 is arranged on the water supply pipeline 510 and is used to control the on-off of the water supply pipeline 510.

[0156] The water supply control valve 610 is a water supply stop valve 512 arranged on the second water supply pipeline 515. The water supply control valve 610 can be closed or opened to control the on-off of the water supply pipeline 510.

[0157] In some embodiments of the present application, the mixed water control valve group includes:

[0158] The mixed water control valve 620 is connected at the connection between the water supply pipeline 510 and the second outlet pipeline 522, and is used to mix the water flow from the water supply pipeline 510 and the water tank 210 and control the on-off of the second outlet pipeline 522.

[0159] The water mixing control valve 620 is a constant temperature control valve that automatically mixes cold water from the water supply pipeline 510 and hot water from the water tank 210 to form medium temperature water.

[0160] The water mixing control valve 620 is a constant temperature control valve that can manually set the temperature of the mixed water, for example, 40 degrees. The water mixing control valve 620 has a hot water inlet portion 940 and a cold water inlet portion 950.

[0161] The water mixing control valve 620 automatically adjusts the opening size of the hot water inlet portion 940 and the cold water inlet portion 950 according to the set temperature, thereby ensuring that the outlet water temperature is 40℃. In this way, even if the user uses the faucet all the time, it will not cause burns.

[0162] When the water supply control valve 610 is closed, the cold water in the water supply pipeline 510 cannot be delivered to the water mixing control valve 620 for mixing. At this time, the water flow in the water mixing control valve 620 is all hot water flowing out of the water tank 210. Due to the high water temperature, the water mixing control valve 620 will automatically adjust to gradually close the opening of the hot water outlet portion 212 until the second outlet pipeline 522 is finally closed, so that no mixed water flows through the mixed outlet pipeline 530.

[0163] When the heat pump unit is in the sterilization mode, the water supply control valve 610 and the water mixing control valve 620 are closed, and the sterilization control valve 710 is opened.

[0164] When the heat pump unit is in the water mixing mode, the water supply control valve 610 and the water mixing control valve 620 are opened, and the sterilization control valve 710 is closed.

[0165] When using hot water normally, the water supply control valve 610 is opened, the sterilization control valve 710 is closed, the water in the water tank 210 reaches the first outlet pipeline, from the first outlet pipeline to the second outlet pipeline, and finally to the water mixing control valve 620. The sterilization pipeline 700 does not flow through the water in the water tank 210. The tap water from the external water source can also reach the water mixing control valve 620. The water mixing control valve 620 circuit is working normally. The water mixing control valve 620 mixes the high-temperature water from the water tank 210 and the cold water from the tap water to form medium temperature water and then sends it to the faucet and other water terminal 410.

[0166] When the hot force sterilization is performed, the water supply control valve 610 is closed, the sterilization control valve 710 is opened, and since the tap water cannot reach the automatic water mixing control valve 620, the water temperature of the water mixing control valve 620 is higher than the set temperature, and then the opening degree of the hot water inlet portion 940 is gradually reduced until the water inlet of the water mixing control valve 620 is completely closed, the second water outlet pipeline 522 is closed, and at this time, the water in the water tank 210 flows out from the first water outlet pipeline and then does not flow into the second water outlet pipeline 522 but enters the sterilization pipeline 700 connected with the first water outlet pipeline 521.

[0167] The sterilization pipeline 700 starts to work, the high-temperature water in the water tank 210 directly enters the user water pipe group 310 through the electromagnetic valve, and then reaches the water terminal 410 such as a faucet, at this time, the user can open the faucet and other water terminals 410 to achieve the hot force sterilization of the user water pipe group 310 and the water terminal 410, and ensure the health and safety.

[0168] After the hot force sterilization for a period of time, the sterilization control valve 710 is closed, the water supply control valve 610 is opened, and the water terminal 410 is closed, so that the entire heat pump unit returns to the normal use of the mixed water mode.

[0169] The above embodiment has the following advantages and effects:

[0170] By arranging the water tank water outlet pipeline into the first water outlet pipeline and the second water outlet pipeline and connecting the bypass sterilization pipeline 700 on the first water outlet pipeline 521, in use, the user can control the water flowing out of the first water outlet pipeline 521 to mix with the water of the water supply pipeline 510 through the second water outlet pipeline 522 or not to flow through the second water outlet pipeline 522 but directly flow to the user water pipe group 310 through the sterilization pipeline 700 for hot force sterilization, and at the same time, the mixed water and sterilization are considered, that is, the mixed water temperature is ensured not to scald the user and the sterilization is ensured, and the health and safety of use are ensured.

[0171] In some embodiments of the present application, the water tank water outlet pipeline 520 includes:

[0172] The first water outlet pipeline is connected with the water tank 210;

[0173] The second water outlet pipeline connected with the first water outlet pipeline is connected with the water supply pipeline 510;

[0174] The sterilization pipeline 700 is connected with the first water outlet pipeline at one end and connected with the user water pipe group 310 at the other end.

[0175] The sterilization pipeline 700 and the second water outlet pipeline 522 are connected with the first water outlet pipeline 521 connected with the water tank 210, so that the hot water in the water tank 210 can be transported to the sterilization pipeline 700 for sterilization or transported to the second water outlet pipeline 522 for water mixing when in use.

[0176] The water mixing control valve group comprises:

[0177] The first control valve 630 is arranged on the water supply pipeline 510 and used for controlling the opening and closing of the first water supply pipeline 514.

[0178] The second control valve 640 is arranged on the second water outlet pipeline and used for controlling the opening and closing of the second water outlet pipeline.

[0179] The first control valve 630 and the second control valve 640 are used in cooperation to realize the opening and closing control of the water supply pipeline 510 and the second water outlet pipeline 522, thereby realizing the control of the mixed water outlet.

[0180] The first control valve 630 and the second control valve 640 are respectively the first stop valve 512 and the second stop valve 512.

[0181] When the heat pump unit is in the sterilization mode, the first control valve 630 and the second control valve 640 are closed, and the sterilization control valve 710 is opened.

[0182] When the heat pump unit is in the water mixing mode, the first control valve 630 and the second control valve 640 are opened, and the sterilization control valve 710 is closed.

[0183] When the first control valve 630 and the second control valve 640 are both opened and the sterilization control valve 710 is closed, the sterilization pipeline 700 is disconnected, the second water outlet pipeline 522 and the water supply pipeline 510 are connected, and the high-temperature water in the water tank 210 can be mixed with the water in the water supply pipeline 510.

[0184] When the first control valve 630 and the second control valve 640 are both closed and the sterilization control valve 710 is opened, the second water outlet pipeline 522 and the water supply pipeline 510 are disconnected, and the sterilization pipeline 700 is connected, so that the high-temperature water in the water tank 210 enters the sterilization pipeline 700.

[0185] The above embodiment has the following advantages and effects:

[0186] The water mixing control valve group is arranged in the form of the first control valve 630 and the second control valve 640 in cooperation, so that the opening and closing control of the second water outlet pipeline 522 and the water supply pipeline 510 for water mixing can be realized.

[0187] The control of the second outlet pipeline and the sterilization pipeline 700 connected with the first outlet pipeline 521 is realized by switching control between the first control valve 630 and the second control valve 640 and the sterilization control valve 710, so as to realize the switching control of the mixed water mode and the sterilization module.

[0188] In some embodiments of the present application, the water tank 210 comprises a water inlet part 211 in communication with the internal space of the water tank 210, and the water supply pipeline 510 is connected to the water inlet part 211 of the water tank 210 for water replenishment of the water tank 210. A one-way valve 511, a stop valve 512 and a pressure reducing valve 513 are arranged on the water supply pipeline 510.

[0189] The water supply pipeline 510 comprises a third water supply pipeline 516 connected to the water inlet part 211.

[0190] The water inlet part 211 is a water inlet opening formed on the water tank 210, and the first water supply pipeline 514 is connected to a water supply source such as a tap water supply source. Water can be transported to the third water supply pipeline 516 through the first water supply pipeline 514 to supply water to the inside of the water tank 210, so as to ensure the water amount in the water tank 210.

[0191] The first water supply pipeline 514 connected to the tap water supply source is provided with the stop valve 512, the pressure reducing valve 513 and the one-way valve 511. The water tank 210 is automatically filled with water by controlling the above-mentioned valves, so as to ensure the water amount in the water tank 210 and maintain constant water pressure. The stop valve 512 can be manually opened or closed during use. When the stop valve 512 is opened, the automatic water filling function of the water tank 210 is started, and when the stop valve 512 is closed, the automatic water filling function of the water tank 210 is stopped.

[0192] The pressure reducing valve 513 is used to ensure the water pressure in the water tank 210, and the pressure value can be manually set, for example, the water pressure in the water tank 210 is set to 2 bar. When the user uses water, the water amount in the water tank 210 decreases, and the water pressure decreases. When the water pressure is lower than 2 bar, the pressure reducing valve 513 is automatically opened to fill water. When the user stops using water, the water pressure reaches 2 bar through water filling, and the pressure reducing valve 513 stops filling water.

[0193] The one-way valve 511 is used to ensure that water flow can only flow from the water supply source to the inside of the water tank 210 in one direction, and the problem of water flow in the opposite direction does not occur.

[0194] In some embodiments of the present application, the water supply pipeline 510 is connected to the water terminal group 400 through a connection pipe group.

[0195] The connection pipe group comprises a main connection pipe 810 and a plurality of branch pipes 820 connected to the main connection pipe 810. The plurality of branch pipes 820 are respectively connected to the plurality of water terminals 410, and the main connection pipe 810 is connected to the first water supply pipeline 514.

[0196] The control component is a control valve 512 arranged on the main connecting pipe 810, and the control valve is used to control the main connecting pipe 810 to be in conduction or be disconnected.

[0197] The connection position of the main connecting pipe 810 and the first water supply pipe 514 is closer to the water supply source than the connection position of the second water supply pipe 515 and the first water supply pipe 514.

[0198] When the user uses the water supply device, the control valve can be opened to make the water from the water supply source directly flow to the main connecting pipe 810 through the first water supply pipe 514, and then the cold water is directly supplied to the water terminal 410 through the straight connecting pipe.

[0199] Alternatively, the user can mix the mixed water from the main connecting pipe 810 and the second water supply pipe 515 and the second water outlet pipe 522 again to obtain the water meeting the temperature requirement of the water terminal 410.

[0200] In some embodiments of the present application, the mixed water control valve 620 comprises:

[0201] The valve body 910 is internally formed with an accommodation space and a mixed water outlet 911 in communication with the accommodation space.

[0202] The valve body 910 is used to constitute the whole mixed water control valve, and the mixed water outlet 911 is a mixed water outlet for discharging the mixed water in the valve body 910.

[0203] In some embodiments of the present application, the mixed water control valve 620 comprises a thermosensitive element 920 arranged in the accommodation space, which is expandable under heat and contractible under cold.

[0204] The thermosensitive element 920 adopts the existing structure of the thermosensitive element 920, and is made of a sensitive material which changes with the temperature.

[0205] The thermosensitive element 920 is expandable under heat and contractible under cold.

[0206] The sliding member 930 is arranged in the valve body 910 and connected with the thermosensitive element 920, and the hot water inlet portion 940 and the cold water inlet portion 950 are formed between the sliding member 930 and the valve body 910.

[0207] The sliding member 930 is a sliding sleeve which is used to cooperate with the valve body 910 to form the hot water inlet portion 940 and the cold water inlet portion 950, and the hot water inlet portion 940 and the cold water inlet portion 950 are hot water inlets and cold water inlets respectively formed between the valve body 910 and the sliding member 930.

[0208] Hot water enters into the valve body 910 from the hot water inlet part 940, cold water enters into the valve body 910 from the cold water inlet part 950, and the mixed hot and cold water is discharged from the mixed water outlet part 911.

[0209] The slide 930 is connected with the thermal element 920, and when the thermal element 920 is heated and expanded or cooled and shrunk, the slide 930 connected therewith moves synchronously. When the slide 930 moves, the sizes of the hot water inlet part 940 and the cold water inlet part 950 formed between the slide 930 and the valve body 910 change, thereby adjusting the flow rates of the hot water and the cold water entering into the valve body 910, adjusting the mixing ratio of the hot and cold water, and adjusting the temperature of the hot and cold water.

[0210] In some embodiments of the present application, the mixed water control valve 620 comprises a setting knob 960 screwed in the valve body 910 and abutting against the thermal element 920.

[0211] When installed, the valve body 910 is provided with an internally threaded hole, and the setting knob 960 is provided with an externally threaded hole and is inserted into the internally threaded hole to be threadedly connected with the valve body 910.

[0212] The thermal element 920 is arranged below the setting knob 960. When the setting knob 960 is rotated, the setting knob 960 moves up and down along the valve body 910, the setting knob 960 applies a force to the thermal element 920, the thermal element 920 moves up and down, and the slide 930 connected with the thermal element 920 moves up and down, the position of the slide 930 and the valve body 910 changes, and the sizes of the hot water inlet part 940 and the cold water inlet part 950 change.

[0213] The setting knob 960 is mainly used to set the mixed water outlet temperature of the mixed water control valve 620.

[0214] When the setting knob 960 is rotated relative to the valve body 910, the setting knob 960 applies a force to the thermal element 920 to drive the slide 930 to move relative to the valve body 910 to change the sizes of the hot water inlet part 940 and the cold water inlet part 950.

[0215] When the setting knob 960 is rotated to a certain position, the sizes of the hot water outlet part 212 and the cold water outlet part 212 are limited, and at this time, a certain set outlet temperature can be obtained.

[0216] However, in actual use, the mixed water outlet temperature cannot be the set outlet temperature at the beginning, and during the outlet process, the mixed water outlet temperature deviates from the set outlet temperature of the setting knob 960 due to the influence of changes in external factors such as the inlet pressure.

[0217] When the thermal element 920 expands or shrinks, the sliding element 930 is driven to move relative to the valve body 910 to adjust the size of the hot water inlet portion 940 and the cold water inlet portion 950.

[0218] When there is a difference between the mixed water outlet temperature and the set temperature, the thermal element 920 expands or shrinks to drive the sliding element 930 to move and change position, automatically adjusting the size of the hot water inlet portion 940 and the cold water inlet portion 950 to achieve the set water outlet temperature.

[0219] The elastic assembly is arranged between the thermal element 920 and the valve body 910, and is used to apply an elastic force to the thermal element 920 when the thermal element 920 expands or shrinks.

[0220] The mixed water control valve 620 is an automatic constant temperature mixed water valve, and the mixed water outlet of the mixed water control valve 620 has a thermal element 920, which can automatically adjust the size of the hot water inlet and the cold water inlet to ensure that the water outlet temperature is 40 DEG C. The constant water outlet temperature is ensured by the mixed water control valve 620, and the user will not be scalded.

[0221] The above embodiment has the following advantages and effects:

[0222] When the mixed water control valve 620 is used, the setting knob 960 can be rotated to drive the thermal element 920 to move and drive the sliding element 930 to move, thereby changing the size of the hot water inlet portion 940 and the cold water inlet portion 950 formed between the valve body 910, and achieving the setting of the mixed water outlet temperature.

[0223] At the same time, the thermal element 920 built-in can also expand or shrink when the mixed water outlet portion 911 senses that there is a difference between the set water outlet temperature and the mixed water outlet temperature, to drive the sliding element 930 to move and automatically adjust the size of the hot water inlet portion 940 and the cold water inlet portion 950, to achieve automatic adjustment of the water temperature, so that the set water outlet temperature is achieved, and the constant water outlet temperature is ensured.

[0224] In some embodiments of the present application, the valve body 910 comprises a valve body 912 vertically arranged.

[0225] The first extension portion 913 is connected to the valve body 912, and the first water guide space 9131 is formed in the first extension portion 913. The hot water inlet portion 940 is formed at one end of the first extension portion 913 and the sliding element 930 close to the mixed water outlet portion 212, and is in communication with the first water guide space 9131.

[0226] The first extension 913 is a first extension pipe, and the first water guiding space 9131 is formed inside the first extension pipe. It is connected to the water tank outlet pipe 520 and is used to introduce hot water.

[0227] The first extension 913 and the sliding member 930 have a hot water inlet at one end near the mixing outlet 911, which allows the hot water in the first water guiding space 9131 to enter the valve body 912 through the hot water inlet.

[0228] The second extension 914 is connected to the valve body 912. A second water guiding space 9141 is formed in the second extension 914. A cold water inlet 950 is formed between the second extension 914 and the end of the sliding member 930 away from the mixing water outlet 212, which communicates with the second water guiding space 9141.

[0229] The second extension 914 is a second extension pipe, and the second water guiding space 9141 is formed inside the second extension pipe. It is connected to the water supply pipe 510 and is used to introduce cold water.

[0230] The second extension 914 and the sliding member 930 have a cold water inlet 950 at the end away from the mixing outlet 911, so that the cold water in the second water guiding space 9141 can enter the valve body 912 through the cold water inlet 950.

[0231] The hot water inlet 940 is formed at the end of the sliding member 930 near the mixing outlet 911, and the cold water inlet 950 is formed at the end of the sliding member 930 away from the mixing outlet 911.

[0232] When the sliding member 930 is driven by the thermal element 920 to move away from the mixing outlet 911, the hot water inlet 940 will increase and the cold water inlet 950 will decrease. Conversely, the hot water inlet 940 will decrease and the cold water inlet 950 will increase. The temperature of the mixed outlet water is adjusted by changing the size of the two inlets 211.

[0233] In some embodiments of this application, the hot water inlet 940 is formed between the bottom end of the slider 930 and the wall surface of the first extension 913.

[0234] The sliding member 930 has a sliding protrusion 931 near its top end, and an extension protrusion 9142 is formed on the inner wall of the second extension 914, opposite to the sliding protrusion 931. The cold water inlet 950 is formed between the sliding protrusion 931 and the extension protrusion 9142.

[0235] In some embodiments of this application, a guide cylinder 980 with a bottom opening is provided on the valve body 912, and the thermal element 920 is disposed in the guide cylinder 980, and the movement of the thermal element 920 is guided and limited by the guide cylinder 980.

[0236] The sliding member 930 is arranged outside the guide cylinder 980, and a sliding long hole (not shown in the figure) is arranged on the guide cylinder 980, and the sliding member 930 is connected to the thermal element after passing through the sliding long hole.

[0237] When the thermal element 920 moves up and down, the sliding member 930 is driven to move along the sliding long hole to change the position.

[0238] In some embodiments of the present application, the thermal element 920 is formed with a protruding portion 921, and the sliding member 930 can be connected to the protruding portion 921.

[0239] The valve body 910 comprises a first cavity wall 915 arranged opposite to the mixed water outlet portion 911;

[0240] A second cavity wall 916 is arranged opposite to the first cavity wall and close to the mixed water outlet portion 911;

[0241] The elastic assembly comprises a first elastic component 971 sleeved on the thermal element 920, and the two ends are respectively abutted between the protruding portion 921 and the first cavity wall 915;

[0242] A second elastic component 972 is sleeved on the thermal element 920, and the two ends are respectively abutted between the protruding portion 921 and the second cavity wall 916.

[0243] The first elastic component is a first spring, and the second elastic component is a second spring.

[0244] When the thermal element 920 is heated and expanded, it will drive the sliding member 930 to move downward, at this time, it will move downward against the elastic force of the second elastic component 972 arranged between the second cavity wall 916 and the protruding portion 921, to drive the sliding member 930 to move to change the size of the hot water inlet portion 940 and the cold water inlet portion 950.

[0245] When the thermal element 920 is cooled and shrinks, it will drive the sliding member 930 to move upward, at this time, it will move upward against the elastic force of the second elastic component 972 arranged between the first cavity wall 915 and the protruding portion 921, to change the size of the hot water inlet portion 940 and the cold water inlet portion 950.

[0246] Through the arrangement of the first elastic component 971 and the second elastic component 972, the thermal element 920 can move smoothly when it expands or shrinks, and uniform adjustment of the size of the hot water inlet portion 940 and the cold water inlet portion 950 is ensured. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0247] The above merely is the specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, and all should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A heat pump unit, characterized by Comprise: A refrigerant circuit, which circulates refrigerant in a compressor, an air-side heat exchanger, an expansion valve, and a water-side heat exchanger; A water circulation circuit formed by connecting a heat exchange coil in the water-side heat exchanger and a water tank, water in the water tank being capable of exchanging heat with water in the heat exchange coil; A user water pipe group connected with a water terminal group; A mixed water pipe group connected with the water tank, a water supply source, and the user water pipe group, for mixing hot water in the water tank and cold water from the water supply source and delivering the mixed water to the water terminal group connected with the user water pipe group; A mixed water control valve group arranged on the mixed water pipe group for controlling the opening and closing of the mixed water pipe group; A sterilization pipe connected between the user water pipe group and the water tank, a sterilization control valve being arranged on the sterilization pipe for controlling the opening and closing of the sterilization pipe; The heat pump unit comprises a sterilization mode and a mixed water mode; When the heat pump unit is in the sterilization mode, the mixed water control valve group is closed, the mixed water pipe group is disconnected, the sterilization control valve is opened, and the sterilization pipe is connected; When the heat pump unit is in the mixed water mode, the mixed water control valve group is opened, the mixed water pipe group is connected, the sterilization control valve is closed, and the sterilization pipe is disconnected.

2. The heat pump unit according to claim 1, wherein The mixed water pipe group comprises: A water supply pipe connected with an external water supply source; A water tank outlet pipe connected with an outlet of the water tank and connected with the water supply pipe; A mixed water outlet pipe connected between the water supply pipe and the water tank outlet pipe and connected with the user water pipe group, for delivering the mixed water to the user water pipe group.

3. The heat pump unit of claim 2, wherein, The outlet of the water tank is provided with two outlets, and the sterilization pipe is connected with the water tank outlet pipe and connected with the two outlets.

4. The heat pump unit according to claim 2, wherein The water tank outlet pipe comprises: A first outlet pipe connected with the water tank; and A second outlet pipe connected with the first outlet pipe and the water supply pipe; A sterilization pipe connected with the first outlet pipe at one end and connected with the user water pipe group at the other end; The mixed water control valve group comprises: A water supply control valve arranged on the water supply pipe for controlling the opening and closing of the water supply pipe; A mixed water control valve connected between the water supply pipe and the second outlet pipe for mixing water from the water supply pipe and the water tank and controlling the opening and closing of the second outlet pipe; When the heat pump unit is in the sterilization mode, the water supply control valve and the mixed water control valve are closed, and the sterilization control valve is opened; When the heat pump unit is in the mixed water mode, the water supply control valve and the mixed water control valve are opened, and the sterilization control valve is closed.

5. The heat pump unit according to claim 2, wherein The water tank outlet pipe comprises: A first outlet pipe connected with the water tank; A second outlet pipe connected with the first outlet pipe and the water supply pipe; A sterilization pipe connected with the first outlet pipe at one end and connected with the user water pipe group at the other end; The mixed water control valve group comprises: A first control valve arranged on the water supply pipe for controlling the opening and closing of the first water supply pipe; A second control valve arranged on the second outlet pipe for controlling the opening and closing of the second outlet pipe; The first control valve and the second control valve are closed, and the sterilization control valve is opened when the heat pump unit is in the sterilization mode. The first control valve and the second control valve are opened, and the sterilization control valve is closed when the heat pump unit is in the water mixing mode.

6. The heat pump unit according to claim 2, wherein the water tank comprises a water inlet portion in communication with an internal space of the water tank. The water supply pipeline is connected with the water inlet portion of the water tank, and a one-way valve, a stop valve and a pressure reducing valve are arranged on the water supply pipeline.

7. The heat pump unit according to claim 4 or 5, wherein the water supply pipeline comprises: a first water supply pipeline connected with a water supply source; a second water supply pipeline connected with the first water supply pipeline and the second water outlet pipeline; a third water supply pipeline connected with the first water supply pipeline and the water inlet portion of the water tank. The connecting pipeline group is connected between the first water supply pipeline and the water terminal group, and the connecting position of the connecting pipeline group with the first water supply pipeline is closer to the water supply source than the second water supply pipeline. The control component is arranged on the connecting pipeline group and is used to control the opening and closing of the connecting pipeline group.

8. The heat pump unit of claim 7, wherein, 9. The heat pump unit according to claim 1, wherein the water mixing control valve comprises: a valve body, an accommodation space and a mixed water outlet portion in communication with the accommodation space being formed in the valve body; a thermosensitive element arranged in the accommodation space and expandable under heat and contractible under cold; a sliding member arranged in the valve body and connected with the thermosensitive element, a hot water inlet portion and a cold water inlet portion being formed between the sliding member and the valve body; a setting knob screwed in the valve body and abutting against the thermosensitive element; an elastic assembly arranged between the thermosensitive element and the valve body and used to apply an elastic force to the thermosensitive element when the thermosensitive element expands or contracts; when the setting knob is rotated relative to the valve body, the setting knob applies a force to the thermosensitive element to drive the sliding member to move relative to the valve body to change the sizes of the hot water inlet portion and the cold water inlet portion; when the thermosensitive element expands or contracts, the sliding member is driven to move relative to the valve body to adjust the sizes of the hot water inlet portion and the cold water inlet portion. The valve body comprises a valve body proper; a first extension portion formed on the valve body proper, a first water guide space being formed in the first extension portion, a hot water inlet portion being formed between the first extension portion and the sliding member at a side close to the mixed water outlet portion and being in communication with the first water guide space; a second extension portion formed on the valve body proper, a second water guide space being formed in the second extension portion, a cold water inlet portion being formed between the second extension portion and the sliding member at a side away from the mixed water outlet portion and being in communication with the second water guide space. ​ 10. The heat pump unit of claim 9, wherein, ​ ​ ​

Images