Tap water source heat pump system

Abstract

The invention provides a tap water source heat pump system, belongs to the technical field of tap water source heat pumps, and solves the problem that the water quality is influenced after tap water is subjected to heat exchange and temperature rise in the prior art. The system comprises a tap water source system and a heat pump unit system, the heat pump unit system comprises a first heat exchanger and a second heat exchanger, a gaseous refrigerant heat exchange pipe and a water source heat exchange pipe are arranged in the first heat exchanger, and a liquid refrigerant heat exchange pipe and a cold medium heat exchange pipe are arranged in the second heat exchanger; an outlet of the clean water tank is connected with a pressure pump through a pipeline, the pressure pump is connected with an inlet of a water source heat exchange pipe through a pipeline, and an outlet of the water source heat exchange pipe is connected with a chlorination device communicated with an inlet of the clean water tank through a pipeline. The chlorine adding device is arranged in the tap water source system, so that the tap water can be subjected to chlorine adding treatment, the effective antibacterial level is dynamically maintained, the breeding environment of microorganisms such as bacteria and algae is blocked, and the good water quality of the tap water after heat exchange and temperature rise is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of tap water source heat pumps, in particular to a tap water source heat pump system. Background Art

[0002] Water-source heat pump technology is a highly efficient energy utilization system based on thermodynamic cycles. Its core principle is to use a small amount of electricity to drive a refrigerant phase change cycle, upgrading low-grade thermal energy (such as solar energy and geothermal energy) stored in shallow surface water bodies (such as groundwater, rivers, and lakes), thereby converting low-grade thermal energy into high-grade thermal energy. In summer, the system uses the water as a cooling source, transferring heat from the building's interior to the water source, completing the cooling cycle. In winter, the system operates in reverse, extracting heat from the water source and transferring it to the building's interior for heating purposes. This technology efficiently utilizes the natural energy in water to meet building heating and cooling needs, offering significant energy efficiency advantages.

[0003] Existing technology, such as patent publication number CN206817821U, discloses a water-source heat pump system using tap water as a cold and hot source. The system includes upstream and downstream buffer storage tanks, a first heat exchanger, a compressor, a second heat exchanger, an expansion valve, a water pump, and several valves. Branches upstream and downstream of the tap water pipe connect to the upstream and downstream buffer storage tanks, respectively. A first heat exchanger branch is connected between the upstream and downstream tap water pipes. The first heat exchanger is connected to a bypass water pipe, and a connecting pipe is provided between the bypass water pipe and the first heat exchanger branch. A water pump is connected to the connecting pipe, allowing water in the downstream buffer storage tank to circulate and exchange heat in the first heat exchanger. Valves are connected to each branch / pipeline and the bypass water pipe to turn the water flow on and off. The compressor and expansion valve are connected to the refrigerant outlet and inlet pipes of the second heat exchanger, respectively, allowing the refrigerant to circulate between the second and first heat exchangers. This system solves the problem of conventional heat pump systems failing to function properly during peak water usage periods.

[0004] The above patent states that after the tap water is heated through heat exchange, free chlorine (hypochlorous acid HClO and hypochlorite ion ClO⁻) will decay, and bacteria, algae and other microorganisms will multiply in large numbers, affecting the water quality of the tap water. Summary of the Invention

[0005] In response to the above problems, the purpose of the present invention is to provide a tap water source heat pump system. A chlorination device is set in the tap water source system to chlorinate the tap water, dynamically maintain an effective antibacterial level, block the breeding environment of microorganisms such as bacteria and algae, and ensure that the tap water has good water quality after heat exchange and temperature increase.

[0006] The technical solution adopted in the present invention is as follows: A tap water source heat pump system, comprising a tap water source system and a heat pump unit system, wherein the heat pump unit system comprises a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is provided with a gaseous refrigerant heat exchange pipe and a water source heat exchange pipe, wherein the second heat exchanger is provided with a liquid refrigerant heat exchange pipe and a cold medium heat exchange pipe, wherein an expansion valve is provided on the pipe between the outlet of the gaseous refrigerant heat exchange pipe and the inlet of the liquid refrigerant heat exchange pipe, and a Steam compressor, the tap water source system includes a clear water tank, the outlet of the clear water tank is connected to a pressure pump through a pipeline, the pressure pump is connected to the inlet of the water source heat exchange pipe through a pipeline, the outlet of the water source heat exchange pipe is connected to a chlorination device connected to the inlet of the clear water tank through a pipeline, a filter is provided on the pipeline between the outlet of the water source heat exchange pipe and the chlorination device, a first temperature sensor is provided on the pipeline connected to the inlet of the water source heat exchange pipe, and a second temperature sensor is provided on the pipeline connected to the outlet of the water source heat exchange pipe.

[0007] Preferably, the chlorination device includes a shell, a channel is provided in the shell, both ends of the channel are connected to tap water pipes, a conical cavity is provided in the shell above the channel, a through groove connected to the channel is provided at the bottom of the conical cavity, a first telescopic rod is movably provided in the through groove, two spaced piston heads are fixedly provided on the first telescopic rod, and the distance between the two piston heads is less than the depth of the through groove, a sodium hypochlorite storage tank is provided in the shell above the conical cavity, a discharge pipe is provided at the bottom of the sodium hypochlorite storage tank, and a solenoid valve is provided in the discharge pipe.

[0008] Preferably, a free chlorine sensor is provided in the channel.

[0009] Preferably, an annular support plate is fixedly connected to the outer wall of the sodium hypochlorite storage tank, and a weighing sensor in contact with the annular support plate is provided on the shell.

[0010] Preferably, an operating cavity is opened on the side wall of the shell, and the operating cavity is provided with a sleeve connected to the through groove. A sealing plug is provided as a movable seal in the sleeve, and the sealing plug is connected to a second telescopic rod fixed in the operating cavity. The lower surface of the sleeve is connected to a drain pipe.

[0011] Preferably, the sleeve is arranged to be inclined downward.

[0012] Preferably, the flow direction of the gaseous refrigerant heat exchange tube is opposite to the flow direction of the water source heat exchange tube, and the flow direction of the liquid refrigerant heat exchange tube is opposite to the flow direction of the cold medium heat exchange tube.

[0013] Preferably, the outlet and the inlet of the clear water tank are respectively arranged at both ends of the clear water tank.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: Installing a chlorination device in the tap water source system can chlorinate the tap water, dynamically maintain an effective antibacterial level, block the breeding environment of microorganisms such as bacteria and algae, and ensure that the tap water has good water quality after heat exchange and temperature increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of a process flow provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a chlorination device provided in an embodiment of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0017] Reference numerals: 1-tap water source system; 101-clean water tank; 102-pressure pump; 103-first temperature sensor; 104-second temperature sensor; 105-filter; 106-chlorination device; 1061-housing; 1062-channel; 1063-conical cavity; 1064-operating cavity; 1065-discharge pipe; 1066-annular support plate; 1067-sodium hypochlorite storage tank; 1068-weighing sensor; 1069-free chlorine sensor; 10610 -First telescopic rod; 10611-Piston head; 10612-Through groove; 10613-Sealing plug; 10614-Drain pipe; 10615-Sleeve; 10616-Second telescopic rod; 2-Heat pump unit system; 201-First heat exchanger; 202-Gaseous refrigerant heat exchange pipe; 203-Expansion valve; 204-Second heat exchanger; 205-Water source heat exchange pipe; 206-Steam compressor; 207-Liquid refrigerant heat exchange pipe; 208-Cold medium heat exchange pipe; 3-Tap water pipe. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] The following combination Figure 1-Figure 3 The present invention is described in detail.

[0022] Example A tap water source heat pump system includes a tap water source system 1 and a heat pump unit system 2. The heat pump unit system 2 includes a first heat exchanger 201 and a second heat exchanger 204. The first heat exchanger 201 is provided with a gaseous refrigerant heat exchange pipe 202 and a water source heat exchange pipe 205. The second heat exchanger 204 is provided with a liquid refrigerant heat exchange pipe 207 and a cold medium heat exchange pipe 208. A heat exchanger 208 is provided on the pipe between the outlet of the gaseous refrigerant heat exchange pipe 202 and the inlet of the liquid refrigerant heat exchange pipe 207. There is an expansion valve 203, and a steam compressor 206 is provided on the pipe between the inlet of the gaseous refrigerant heat exchange pipe 202 and the outlet of the liquid refrigerant heat exchange pipe 207. The tap water source system 1 includes a clear water tank 101, and the outlet of the clear water tank 101 is connected to a pressure pump 102 through a pipe. The pressure pump 102 is connected to the inlet of the water source heat exchange pipe 205 through a pipe. The outlet of the water source heat exchange pipe 205 is connected to a chlorination device 106 connected to the inlet of the clear water tank 101 through a pipe.

[0023] The clear water tank 101 is arranged in the pressure pump station of the tap water supply network. It is a water tank in the pressure pump station. The pressure pump 102 extracts the tap water in the clear water tank 101 and sends it to the water source heat exchange pipe 205. After absorbing the heat of the refrigerant in the first heat exchanger 201, it returns to the clear water tank 101 by relying on the residual pressure. The clear water tank 101 is fully sealed with the pipeline to isolate the external pollutants from entering; during the tap water reflux process, the chlorination device 106 can chlorinate the tap water, dynamically maintain the effective antibacterial level, block the breeding environment of bacteria, algae and other microorganisms, and ensure that the tap water has good water quality after heat exchange and heating.

[0024] The factory temperature of tap water in summer is typically 12°C to 18°C. Because the water supply network is buried underground, it is less affected by ground temperature, allowing the water temperature to remain low and stable. This stable low temperature increases the heat exchange temperature difference between tap water and refrigerant, providing higher cooling output compared to traditional water sources, significantly reducing energy consumption. Clear Water Tank 101 serves as a thermal buffer unit, providing peak-shaving and valley-filling regulation. By dynamically balancing fluctuations in the municipal water supply network, it achieves cooling capacity and continuous water flow from the water source, ensuring stable operation of the tap water heat pump cooling system.

[0025] In cooling mode, heat pump system 2 operates as a condenser. High-temperature, high-pressure gaseous refrigerant flows into gaseous refrigerant heat exchange pipe 202 of first heat exchanger 201. It exchanges heat with tap water from clean water tank 101 in water source heat exchange pipe 205, releasing heat and condensing into a high-pressure liquid. The tap water then absorbs heat and flows back through the pipe to clean water tank 101. During this process, the temperature of the outgoing refrigerant is higher than the temperature of the incoming tap water. The high-pressure liquid refrigerant then flows into expansion valve 203 for adiabatic throttling, transforming into a low-temperature, low-pressure liquid before entering second heat exchanger 204. Second heat exchanger 204 operates as an evaporator. Low-temperature, low-pressure liquid refrigerant flows into liquid refrigerant heat exchange pipe 207, exchanging heat with the refrigerant in refrigerant heat exchange pipe 208. Since the refrigerant temperature is always lower than the refrigerant, the refrigerant absorbs heat from the refrigerant, lowering the refrigerant temperature and meeting the cooling requirements of the cold end. The evaporated, low-temperature, low-pressure gaseous refrigerant is compressed into a high-temperature, high-pressure gaseous refrigerant by steam compressor 206 and then flows back into first heat exchanger 201, completing the thermodynamic cycle. In winter, first heat exchanger 201 operates as an evaporator, while second heat exchanger 204 operates as a condenser. The heat is transferred from hot tap water to the refrigerant heat exchange pipe 208, meeting the heating needs of the heat-consuming end.

[0026] In this embodiment, by precisely controlling the booster pump 102 , the flow rate of the water source heat exchange pipe 205 can be dynamically adjusted as needed to adapt to different cooling load requirements and achieve precise matching of cooling capacity and cooling load.

[0027] The pipes of the tap water source system 1 and the flow-through components of the booster pump 102 are all made of stainless steel. While maintaining the efficient heat transfer performance of the heat exchanger, they can also resist corrosion from chloride ions (Cl⁻), dissolved oxygen and trace minerals in the tap water, avoiding the precipitation of impurities caused by pipeline corrosion and contaminating the water quality of the source.

[0028] The chlorination device 106 includes a shell 1061, which is provided with a channel 1062. Both ends of the channel 1062 are connected to the tap water pipe 3. The shell 1061 is provided with a tapered cavity 1063 located above the channel 1062. The bottom of the tapered cavity 1063 is provided with a through groove 10612 connected to the channel 1062. A first telescopic rod 10610 is movably provided in the through groove 10612. Two spaced piston heads 10611 are fixedly provided on the first telescopic rod 10610. The distance between the two piston heads 10611 is less than the depth of the through groove 10612. A sodium hypochlorite storage tank 1067 is provided in the shell 1061 and located above the tapered cavity 1063. A discharge pipe 1065 is provided at the bottom of the sodium hypochlorite storage tank 1067, and a solenoid valve is provided in the discharge pipe 1065. The distance between the two piston heads 10611 is smaller than the depth of the through groove 10612 , ensuring that the upper piston head 10611 enters the through groove 10612 before the lower piston head 10611 moves out of the through groove 10612 .

[0029] The first telescopic rod 10610 and the solenoid valve are connected to a controller (the controller is conventional and not shown in the figure). The first telescopic rod 10610 can be a hydraulic telescopic rod or a lifting rod driven by a screw rod. When chlorine addition is needed, the controller controls the solenoid valve to open, and the sodium hypochlorite solution falls from the sodium hypochlorite storage tank 1067 into the tapered cavity 1063 and collects in the through groove 10612. At this time, the lower piston head 10611 blocks the through groove 10612, and then the first telescopic rod 10610 is controlled to extend. Before the lower piston head 10611 moves out of the through groove 10612, the upper piston head 10611 enters the through groove 10612 to block the through groove 10612. When the lower piston head 10611 moves out of the through groove 10612, the sodium hypochlorite solution mixes with the tap water to generate hypochlorous acid, thereby replenishing free chlorine and ensuring the disinfection effect of the tap water; since the upper piston head 10611 blocks the through groove 10612, the tap water will not enter the tapered cavity 1063, thereby ensuring the normal delivery of the sodium hypochlorite solution and realizing the online chlorination operation on the tap water pipe.

[0030] A free chlorine sensor 1069 is provided in channel 1062. Connected to a controller, it detects the free chlorine concentration in tap water. When the free chlorine concentration drops to a set value, the sensor 1069 feeds a signal back to the controller, which then opens the solenoid valve to release sodium hypochlorite solution. After release, the controller closes the solenoid valve and extends and retracts the first telescopic rod 10610. The detection time of the free chlorine sensor 1069 must be timed. After sodium hypochlorite is released, the sensor must wait for the tap water to circulate for a certain period of time before testing again to determine whether the free chlorine concentration meets the required level.

[0031] An annular support plate 1066 is fixedly attached to the outer wall of the sodium hypochlorite storage tank 1067. A load cell 1068 is provided on the housing 1061 and contacts the annular support plate 1066. Load cell 1068 is connected to a controller and can monitor the weight of the sodium hypochlorite storage tank 1067 in real time. When sodium hypochlorite solution is added, once the weight drops to a certain value, load cell 1068 provides a feedback signal to the controller, which automatically closes the solenoid valve, achieving a quantitative dosage of sodium hypochlorite solution.

[0032] An operating chamber 1064 is provided on the side wall of the shell 1061. The operating chamber 1064 is provided with a sleeve 10615 connected to the through groove 10612. A sealing plug 10613 is provided as a movable seal in the sleeve 10615. The sealing plug 10613 is connected to a second telescopic rod 10616 fixed in the operating chamber 1064. The lower surface of the sleeve 10615 is connected to a drain pipe 10614. When the second telescopic rod 10616 pushes the sealing plug 10613 to one end close to the through groove 10612, the sealing plug 10613 blocks the sleeve 10615, which can prevent the sodium hypochlorite solution from flowing out of the sleeve 10615 when the sodium hypochlorite solution is added; when the two piston heads 10611 are reset upward, the lower piston head 10611 will bring some tap water into the through groove 10612, thereby affecting the subsequent amount of sodium hypochlorite solution added. At this time, the second telescopic rod 10616 can be controlled to retract, and the sealing plug 10613 can be moved to the left side of the upper nozzle of the drain pipe 10614. The tap water in the through groove 10612 passes through the sleeve 10615 and the drain pipe 10614 and is discharged from the housing 1061 to ensure that there is enough space in the through groove 10612 to accommodate the sodium hypochlorite solution. After the tap water is discharged, the sealing plug 10613 is pushed back to its initial position.

[0033] Among them, the second telescopic rod 10616 can be a hydraulic telescopic rod or a telescopic rod driven by a screw rod. The second telescopic rod 10616 is connected to the controller. The controller can set a timer to control the extension of the second telescopic rod 10616. For example, when the first telescopic rod 10610 retracts into place, the controller automatically controls the retraction of the second telescopic rod 10616. After drainage for a certain period of time, the controller automatically controls the extension of the second telescopic rod 10616 to push the sealing plug 10613 back to its initial position.

[0034] The sleeve 10615 is tilted downward to more conveniently discharge the tap water from the groove 10612.

[0035] The number of times the sodium hypochlorite solution is added can be set according to the amount of tap water. When a low free chlorine content is detected, the sodium hypochlorite solution can be added continuously for multiple times to make the free chlorine content meet the standard.

[0036] A filter 105 is installed on the pipeline between the outlet of the water source heat exchange tube 205 and the chlorination device 106. Filter 105 is primarily used to remove suspended particulate matter, mechanical impurities with a particle size ≥20μm, and some colloidal substances from the tap water source. These impurity particles generally originate from rust residue produced by corrosion on the inner walls of old external water supply pipes, as well as from the sudden expansion or contraction of the inlet and outlet areas of the water source heat exchange tube 205, forming short-circuit or stagnation zones. This significantly reduces local flow velocity, hinders the diffusion of residual chlorine, and breeds microorganisms. Filter 105 preferentially intercepts impurity particles in the pipeline to prevent subsequent pipeline blockage and affect the operation of the chlorination device 106. Filter 105 and chlorination device 106 form a synergistic "filtration first, chlorination later" mechanism, which not only maintains water cleanliness but also inhibits microbial growth. This layout also utilizes the low-temperature environment at the end to improve chlorine replenishment efficiency, ultimately ensuring that the tap water returning to the clear water tank is always safe and hygienic, ensuring the long-term stable operation of the system.

[0037] A first temperature sensor 103 is provided on the pipe connected to the inlet of the water source heat exchange pipe 205, and a second temperature sensor 104 is provided on the pipe connected to the outlet of the water source heat exchange pipe 205. The first temperature sensor 103 and the second temperature sensor 104 are used to monitor the temperature of the tap water entering and leaving the water source heat exchange pipe 205 in real time. Through the collected temperature difference data, the heat exchange efficiency of the heat exchanger can be dynamically evaluated, and when the temperature difference deviates from the design value, the operating parameters of the booster pump 102 can be adjusted to return the temperature difference to a reasonable range, thereby ensuring efficient and stable operation of the system. Preferably, the first temperature sensor 103 is set at a position close to the inlet of the water source heat exchange pipe 205, and the second temperature sensor 104 is set at a position close to the outlet of the water source heat exchange pipe 205, so as to more accurately measure the temperature change.

[0038] The flow direction of the gaseous refrigerant heat exchange tube 202 is opposite to that of the water source heat exchange tube 205 , and the flow direction of the liquid refrigerant heat exchange tube 207 is opposite to that of the cold medium heat exchange tube 208 , so that heat can be better exchanged.

[0039] The outlet and inlet of the clear water tank 101 are respectively arranged at both ends of the clear water tank 101. The outlet and inlet of the clear water tank 101 are arranged below the liquid level of the clear water tank 101. This layout effectively avoids direct short-circuit between return water and supply water by extending the water flow path, ensuring that the tap water with a higher temperature after heat exchange can be fully mixed with the low-temperature water from the water supply network after returning to the clear water tank 101 to reduce the water temperature, thereby eliminating the impact of water temperature fluctuations on the heat exchange efficiency of the heat pump.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tap water source heat pump system, comprising a tap water source system (1) and a heat pump unit system (2), characterized in that: The heat pump unit system (2) includes a first heat exchanger (201) and a second heat exchanger (204), wherein the first heat exchanger (201) is provided with a gaseous refrigerant heat exchange pipe (202) and a water source heat exchange pipe (205), and the second heat exchanger (204) is provided with a liquid refrigerant heat exchange pipe (207) and a cold medium heat exchange pipe (208), an expansion valve (203) is provided on the pipe between the outlet of the gaseous refrigerant heat exchange pipe (202) and the inlet of the liquid refrigerant heat exchange pipe (207), and a steam compressor (206) is provided on the pipe between the inlet of the gaseous refrigerant heat exchange pipe (202) and the outlet of the liquid refrigerant heat exchange pipe (207), and the tap water source system (1 ) comprises a clear water tank (101), the outlet of the clear water tank (101) is connected to a pressure pump (102) via a pipeline, the pressure pump (102) is connected to the inlet of a water source heat exchange pipe (205) via a pipeline, the outlet of the water source heat exchange pipe (205) is connected to a chlorination device (106) which is in communication with the inlet of the clear water tank (101) via a pipeline, a filter (105) is provided on the pipeline between the outlet of the water source heat exchange pipe (205) and the chlorination device (106), a first temperature sensor (103) is provided on the pipeline connected to the inlet of the water source heat exchange pipe (205), and a second temperature sensor (104) is provided on the pipeline connected to the outlet of the water source heat exchange pipe (205).

2. A tap water source heat pump system according to claim 1, characterized in that: The chlorination device (106) comprises a shell (1061), a channel (1062) is provided in the shell (1061), both ends of the channel (1062) are connected to a water pipe (3), a conical cavity (1063) is provided in the shell (1061) and is located above the channel (1062), a through groove (10612) communicating with the channel (1062) is provided at the bottom of the conical cavity (1063), and a first telescopic rod ( 10610), two spaced piston heads (10611) are fixedly provided on the first telescopic rod (10610), the distance between the two piston heads (10611) is less than the depth of the through groove (10612), a sodium hypochlorite storage tank (1067) is provided in the housing (1061) and is located above the conical cavity (1063), a discharge pipe (1065) is provided at the bottom of the sodium hypochlorite storage tank (1067), and a solenoid valve is provided in the discharge pipe (1065).

3. A tap water source heat pump system according to claim 2, characterized in that: A free chlorine sensor (1069) is provided in the channel (1062).

4. A tap water source heat pump system according to claim 2, characterized in that: An annular support plate (1066) is fixedly connected to the outer wall of the sodium hypochlorite storage tank (1067), and a weighing sensor (1068) in contact with the annular support plate (1066) is provided on the housing (1061).

5. A tap water source heat pump system according to claim 2, characterized in that: An operating chamber (1064) is formed on the side wall of the housing (1061). The operating chamber (1064) is provided with a sleeve (10615) in communication with the through groove (10612). A sealing plug (10613) is provided as a movable seal in the sleeve (10615). The sealing plug (10613) is connected to a second telescopic rod (10616) fixed in the operating chamber (1064). The lower surface of the sleeve (10615) is connected to a drain pipe (10614).

6. A tap water source heat pump system according to claim 5, characterized in that: The sleeve (10615) is arranged to be tilted downward.

7. The tap water source heat pump system according to claim 1, characterized in that: The flow direction of the gaseous refrigerant heat exchange tube (202) is opposite to the flow direction of the water source heat exchange tube (205), and the flow direction of the liquid refrigerant heat exchange tube (207) is opposite to the flow direction of the cold medium heat exchange tube (208).

8. The tap water source heat pump system according to claim 1, characterized in that: The outlet and the inlet of the clear water tank (101) are respectively arranged at two ends of the clear water tank (101).

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