A kind of anti-blocking water source heat pump system with automatic dredging function

Abstract

This utility model belongs to the field of HVAC technology and discloses an anti-clogging water source heat pump system with automatic unclogging function. It includes a water source heat pump unit and a water supply well. A water source pump is installed in the water supply well, and the water source pump is sequentially connected to a well water outlet pipe, a cyclone separator, a self-clogging multi-stage filter box, a water tank outlet pipe, and the water source heat pump unit. The outlet of the water source heat pump unit is connected to a well water reinjection pipe via a pipeline, and the well water reinjection pipe is connected to a return water well. The outlet of the water source heat pump unit is also connected to an end user via a terminal water supply pipe. The end user is connected to the inlet of the water source heat pump unit via a terminal return water pipe. A terminal circulating water pump is installed on the terminal return water pipe, and the terminal return water pipe is also connected to an external makeup water pipe. This system has an automatic water source cleaning function, which can effectively and promptly clean impurities on the water source side and reduce labor costs. Furthermore, maintaining a balanced water volume between the pumping well and the reinjection well ensures the dynamic balance of groundwater and the stability of system operation.

Description

Technical Field

[0001] This utility model belongs to the field of HVAC technology, and relates to an anti-clogging water source heat pump system with automatic unblocking function. Background Technology

[0002] The existing system's source water filter cannot automatically clean impurities, requiring periodic manual intervention. When impurities are not cleaned promptly, the system's ability to treat impurities in the medium is affected. Furthermore, the return water from the source side is directly returned to the pumping well (instead of through a separate reinjection well), causing the pumping well water temperature to gradually approach the return water temperature, creating a thermal short circuit and hindering the application of the water source heat pump system. This system solves the problem of reduced heat exchanger capacity and decreased reinjection water volume caused by blockage and scaling during long-term system operation. Even with only coarse pretreatment of river, sea, and seawater, small-diameter solid particles still remain in the water, affecting the heat exchanger's heat exchange characteristics. Moreover, if dirt adhering to the filter screen is not removed promptly, it will hinder the amount of water entering the heat pump system, leading to decreased system efficiency and increased energy consumption. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology. To ensure that water from the water source side smoothly enters the heat exchanger for heat exchange, ensuring the heat exchanger has good heat exchange performance, and that the water after heat exchange is smoothly reinjected back into the ground, this invention provides a clog-resistant water source heat pump system with an automatic unblocking function. This system has an automatic function to clean impurities from the water source side, which can effectively and promptly remove impurities and reduce labor costs. The system has separate pumping wells and reinjection wells, with a certain distance between them to avoid thermal short-circuiting. Furthermore, maintaining a balanced water volume between the pumping wells and the reinjection wells ensures the dynamic balance of groundwater and the stability of system operation.

[0004] This ensures the long-term stable and reliable operation of the entire system and maintains the dynamic balance of groundwater.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a clog-resistant water source heat pump system with automatic unblocking function, including a water source heat pump unit and a water supply well; a water source pump is installed in the water supply well, and the water source pump is sequentially connected to a well water outlet pipe, a cyclone sand separator, a self-unblocking multi-stage filter box, a water tank outlet pipe, and the water source heat pump unit; the outlet of the water source heat pump unit is connected to a well water reinjection pipe through a pipe, and the well water reinjection pipe is connected to a return water well; the outlet of the water source heat pump unit is also connected to an end user through a terminal water supply pipe; the end user is connected to the inlet of the water source heat pump unit through a terminal return water pipe; a terminal circulating water pump is installed on the terminal return water pipe; the terminal return water pipe is also connected to an external water replenishment pipe;

[0006] The self-draining multi-stage filter box includes a box body, in which an inlet zone, a filtration zone, and a settling zone are arranged sequentially. A medium-efficiency filtration section is arranged between the inlet zone and the filtration zone, and a high-efficiency filtration section is arranged between the filtration zone and the settling zone. A pressure sensor is arranged in front of the medium-efficiency filtration section, between the medium-efficiency filtration section and the high-efficiency filtration section, and after the high-efficiency filtration section.

[0007] A solenoid valve is installed on the well water outlet pipeline.

[0008] The cyclone sand separator is connected to the self-draining multi-stage filter box via a water tank inlet pipe, and a solenoid valve is installed on the water tank inlet pipe.

[0009] The water tank outlet pipe is equipped with a pressure gauge, butterfly valve, filter, system circulating water pump, check valve, butterfly valve, and pressure gauge in sequence; the direction is from the outlet of the self-draining multi-stage filter box to the inlet of the water source heat pump unit.

[0010] The water tank outlet pipe is connected to regulating valve group A via the system circulating water pump outlet pipe;

[0011] The return water pipeline at the end is installed in the following order: pressure gauge, butterfly valve, filter, end circulating water pump, check valve, butterfly valve, pressure gauge; the direction is from the end user to the water source heat pump unit.

[0012] The end return water pipeline is connected to the regulating valve group A through the outlet pipeline of the end circulating water pump.

[0013] The regulating valve group A includes parallel pipelines a and b. Butterfly valves A and H are installed on pipeline a, and butterfly valves B and G are installed on pipeline b. Butterfly valves A and B are installed at the end connected to the outlet pipeline of the terminal circulating water pump, and butterfly valves H and G are installed at the end connected to the outlet pipeline of the system circulating water pump.

[0014] Pipe a connects to the condenser inlet pipe, and pipe b connects to the evaporator inlet pipe.

[0015] A filter, thermometer, pressure gauge, and butterfly valve are installed sequentially on the condenser inlet water pipe; the condenser inlet water pipe is connected to the inlet of the water source heat pump unit.

[0016] A filter, thermometer, pressure gauge, and butterfly valve are installed in sequence on the evaporator inlet water pipe; the evaporator inlet water pipe is connected to the inlet of the water source heat pump unit.

[0017] The terminal water supply pipeline is connected to the outlet of the water source heat pump unit through regulating valve group B; the well water reinjection pipeline is connected to the outlet of the water source heat pump unit through regulating valve group B.

[0018] The regulating valve group B includes parallel pipelines c and d. Butterfly valves C and F are installed on pipeline c, and butterfly valves D and E are installed on pipeline b. Butterfly valves C and D are installed at the end connected to the terminal water supply pipeline, and butterfly valves E and F are installed at the end connected to the well water reinjection pipeline.

[0019] Pipe c connects to the condenser outlet water pipe, and pipe d connects to the evaporator outlet water pipe.

[0020] A butterfly valve, pressure gauge, thermometer, and flow switch are installed in sequence on the condenser outlet water pipe; the condenser outlet water pipe is connected to the outlet of the water source heat pump unit.

[0021] A butterfly valve, pressure gauge, thermometer, and flow switch are installed in sequence on the evaporator outlet water pipe; the evaporator outlet water pipe is connected to the outlet of the water source heat pump unit.

[0022] The water supply pipeline is connected to an external water softening device (preferably equipment from Shijiazhuang Lusheng, model TMFB350). An automatic water supply valve is also installed on the water supply pipeline.

[0023] The water inlet area is equipped with an inlet and an overflow outlet. The overflow outlet is located below the inlet, and both the inlet and the overflow outlet are located on the side wall of the tank.

[0024] An ultrasonic-assisted dirt separator is installed at the bottom of each of the water inlet area, filtration area, and settling area (the ultrasonic-assisted dirt separator is preferably the equipment from Jiemeng Company, model JP-180PLUS).

[0025] All ultrasonic-assisted dirt separators are equipped with a drain port at the bottom, which is connected to a drain pipe.

[0026] A water outlet is installed at the bottom of the settling area.

[0027] The tank is also equipped with a viewing window for observation, with one window for each of the inlet area, filtration area, and settling area.

[0028] Furthermore, a stainless steel woven mesh is installed in the medium-efficiency filtration section for filtration; the stainless steel woven mesh is 60-120 mesh.

[0029] Furthermore, a nanofiber filter is installed within the high-efficiency filtration section for filtration.

[0030] In winter heating mode, the water source heat pump unit opens butterfly valves A, C, E, and G, and closes butterfly valves B, D, F, and H. Well water return water enters the water source heat pump unit via butterfly valve G and the evaporator inlet pipe, then returns to the reinjection well via the evaporator outlet pipe, butterfly valve E, and the well water reinjection pipe, thus circulating to provide heat to the water source heat pump unit. User-side return water enters the water source heat pump unit via butterfly valve A and the condenser inlet pipe, then via the condenser outlet pipe, butterfly valve C, and the terminal water supply pipe, circulating to the end user, thus providing heating to the end user. The summer cooling mode operates in the opposite manner.

[0031] The system is also equipped with a PLC control system. The water source heat pump unit, terminal circulating water pump, system circulating water pump, cyclone sand separator, water source pump, water softening device, automatic water supply valve, ultrasonic auxiliary dirt remover, pressure sensor, solenoid valve, butterfly valve, pressure gauge, thermometer, flow switch, butterfly valve A, butterfly valve B, butterfly valve C, butterfly valve D, butterfly valve E, butterfly valve F, butterfly valve G, butterfly valve H, and filter are all connected to the PLC control system. There is no restriction on any specific model, as long as their working functions are realized.

[0032] The advantages of this utility model compared with the prior art are:

[0033] 1. The anti-clogging water source heat pump system with automatic unblocking function provided by this utility model reduces the impurity content in the system, improves the heat exchange effect of the system, and ensures the amount of water reinjected into the system.

[0034] 2. This utility model adds a self-draining multi-stage filter box, which includes medium and high efficiency filtration sections. This allows for multi-stage filtration of impurities in the well water, ensuring the quality of the water entering the heat exchange system. It also prevents suspended solids, microorganisms, and other impurities from settling on pipes and heat exchangers during long-term operation, thus increasing energy consumption. This improves the heat exchange efficiency of the heat exchanger in the water source heat pump unit and extends the service life of the entire heat exchange system.

[0035] 3. An ultrasonic-assisted dirt remover is added to the bottom of the self-draining multi-stage filter box near the drain outlet. This automatically removes impurities attached to the medium and high efficiency filter sections, reducing the impact of untimely removal of impurities by personnel and ensuring timely and efficient removal of impurities from the filter. This guarantees the quality of water entering the heat exchange system and the reinjection well, thus ensuring the heat exchange effect of the system and the reinjection water volume of the reinjection well, enabling the water source heat pump system to operate stably for a long time. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0037] Figure 1 This is a schematic diagram of a clog-resistant water source heat pump system with automatic unblocking function according to this utility model.

[0038] Figure 2 This is a schematic diagram of a self-draining multi-stage filter box.

[0039] In the diagram: 1. Water source heat pump unit; 2. Self-draining multi-stage filter box; 3. Terminal circulating water pump; 4. System circulating water pump; 5. Cyclone sand separator; 6. Water source pump; 7. Softening water device; 8. Automatic water supply valve; 9. End user; 10. Return water well; 11. Supply water well; 12. Terminal supply water pipeline; 13. Terminal return water pipeline; 14. Water supply pipeline; 15. Well water reinjection pipeline; 16. System circulating water pump outlet pipeline; 17. Well water outlet pipeline; 18. Water tank inlet pipeline; 19. Water tank outlet pipeline; 20. Water inlet. 21. Medium-efficiency filter section; 22. High-efficiency filter section; 23. Water tank viewing window; 24. Water outlet; 25. Sewage outlet; 26. Overflow outlet; 27. Ultrasonic-assisted dirt separator; 28. Pressure sensor; 29. ​​Terminal circulating water pump outlet pipe; 30. Butterfly valve A; 31. Butterfly valve B; 32. Butterfly valve C; 33. Butterfly valve D; 34. Butterfly valve E; 35. Butterfly valve F; 36. Butterfly valve G; 37. Butterfly valve H; 38. Condenser outlet pipe; 39. Condenser inlet pipe; 40. Evaporator outlet pipe; 41. Evaporator inlet pipe. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0041] Example 1

[0042] A clog-resistant water source heat pump system with automatic unblocking function, such as Figure 1-2 As shown, the system includes a water source heat pump unit 1 and a water supply well 11. A water source pump 6 is installed inside the water supply well 11. The water source pump 6 is sequentially connected to a well water outlet pipe 17, a cyclone separator 5, a self-draining multi-stage filter box 2, a water tank outlet pipe 19, and the water source heat pump unit 1. The outlet of the water source heat pump unit 1 is connected to a well water reinjection pipe 15 via a pipe, and the well water reinjection pipe 15 is connected to a return water well 10. The outlet of the water source heat pump unit 1 is also connected to an end user 9 via a terminal water supply pipe 12. The end user 9 is connected to the inlet of the water source heat pump unit 1 via a terminal return water pipe 13. A terminal circulating water pump 3 is installed on the terminal return water pipe 13. The terminal return water pipe 13 is also externally connected to a makeup water pipe 14.

[0043] The self-draining multi-stage filter box 2 includes a box body, in which an inlet zone, a filtration zone, and a settling zone are arranged sequentially. A medium-efficiency filtration section 21 is arranged between the inlet zone and the filtration zone, and a high-efficiency filtration section 22 is arranged between the filtration zone and the settling zone. A pressure sensor 28 is arranged at the front end of the medium-efficiency filtration section 21, between the medium-efficiency filtration section 21 and the high-efficiency filtration section 22, and after the high-efficiency filtration section 22.

[0044] A solenoid valve is installed on the well water outlet pipe 17.

[0045] The cyclone sand separator 5 is connected to the self-draining multi-stage filter box 2 via a water tank inlet pipe 18, and a solenoid valve is installed on the water tank inlet pipe 18.

[0046] The water tank outlet pipe 19 is sequentially equipped with a pressure gauge, butterfly valve, filter, system circulating water pump 4, check valve, butterfly valve, and pressure gauge; the direction is from the outlet of the self-draining multi-stage filter box 2 to the inlet of the water source heat pump unit 1.

[0047] The water tank outlet pipe 19 is connected to the regulating valve group A through the system circulating water pump outlet pipe 16;

[0048] The terminal return water pipeline 13 is sequentially equipped with a pressure gauge, butterfly valve, filter, terminal circulating water pump 3, check valve, butterfly valve, and pressure gauge; the direction is from the terminal user 9 to the water source heat pump unit 1.

[0049] The end return water pipeline 13 is connected to the regulating valve group A through the end circulating water pump outlet pipeline 29.

[0050] The regulating valve group A includes parallel pipelines a and b. Butterfly valves A30 and H37 are installed on pipeline a, and butterfly valves B31 and G36 are installed on pipeline b. Butterfly valves A30 and B31 are installed at the end connected to the outlet pipeline 29 of the terminal circulating water pump, and butterfly valves H37 and G36 are installed at the end connected to the outlet pipeline 16 of the system circulating water pump.

[0051] Pipe a connects to the condenser inlet pipe 39, and pipe b connects to the evaporator inlet pipe 41.

[0052] A filter, thermometer, pressure gauge, and butterfly valve are installed sequentially on the condenser inlet water pipe 39; the condenser inlet water pipe 39 is connected to the inlet of the water source heat pump unit 1.

[0053] A filter, thermometer, pressure gauge, and butterfly valve are installed sequentially on the evaporator inlet water pipe 41; the evaporator inlet water pipe 41 is connected to the inlet of the water source heat pump unit 1.

[0054] The terminal water supply pipeline 12 is connected to the outlet of the water source heat pump unit 4 through the regulating valve group B; the well water reinjection pipeline 15 is connected to the outlet of the water source heat pump unit 1 through the regulating valve group B.

[0055] The regulating valve group B includes parallel pipelines c and d. Butterfly valves C32 and F35 are installed on pipeline c, and butterfly valves D33 and E34 are installed on pipeline b. Butterfly valves C32 and D33 are installed at the end connected to the terminal water supply pipeline 12, and butterfly valves E34 and F35 are installed at the end connected to the well water reinjection pipeline 15.

[0056] Pipe c connects to the condenser outlet water pipe 38, and pipe d connects to the evaporator outlet water pipe 40.

[0057] A butterfly valve, pressure gauge, thermometer, and flow switch are installed sequentially on the condenser outlet water pipe 38; the condenser outlet water pipe 38 is connected to the outlet of the water source heat pump unit 1.

[0058] A butterfly valve, pressure gauge, thermometer, and flow switch are installed sequentially on the evaporator outlet water pipe 41; the evaporator outlet water pipe 41 is connected to the outlet of the water source heat pump unit 1.

[0059] The water supply pipe 14 is connected to an external water softening device 7. An automatic water supply valve 8 is also installed on the water supply pipe 14.

[0060] The water inlet area is provided with an inlet 20 and an overflow outlet 26. The overflow outlet 26 is located below the inlet 20. Both the inlet 20 and the overflow outlet 26 are located on the side wall of the tank.

[0061] An ultrasonic-assisted dirt remover 27 is installed at the bottom of each of the water inlet area, filtration area, and settling area.

[0062] Each ultrasonic-assisted dirt remover 27 is equipped with a drain port 25 at the bottom, and the drain port 25 is connected to a drain pipe.

[0063] A water outlet 24 is provided at the bottom of the settling area.

[0064] The tank is also equipped with a water tank viewing window 23 for observation, with one window for each of the water inlet area, filtration area, and settling area.

[0065] A stainless steel woven mesh is installed in the medium-efficiency filter section 21 for filtration; the stainless steel woven mesh is 60-120 mesh.

[0066] A nano-filter is installed in the high-efficiency filtration section 22 for filtration.

[0067] The system is also equipped with a PLC control system. The water source heat pump unit 1, terminal circulating water pump 3, system circulating water pump 4, cyclone sand separator 5, water source pump 6, water softening device 7, automatic water supply valve 8, ultrasonic auxiliary dirt remover 27, pressure sensor 28, solenoid valve, butterfly valve, pressure gauge, thermometer, flow switch, butterfly valve A30, butterfly valve B31, butterfly valve C32, butterfly valve D33, butterfly valve E34, butterfly valve F35, butterfly valve G36, butterfly valve H37, and filter are all connected to the PLC control system. There is no restriction on any specific model, as long as their working functions are realized.

[0068] Water source pump 6 draws water from water supply well 11 and connects to the inlet of hydrocyclone desander 5 via well water outlet pipe 17. After primary filtration of impurities by hydrocyclone desander 5, the water connects to the inlet of self-draining multi-stage filter box 2 via water tank inlet pipe 18. After multi-stage treatment by self-draining multi-stage filter box 2, the water is connected to the inlet of system circulating water pump 4 via water tank outlet pipe 19. System circulating water pump 4 sends water to water source heat pump unit 1 for heat exchange via system circulating water pump outlet pipe 16. After heat exchange, the water enters return water well 10 via well water return pipe 15. Terminal circulating water pump 3 connects to terminal user 9 via terminal return water pipe 13. Terminal circulating water pump 3 provides hot water power to send water into water source heat pump unit for heat exchange and delivers water to terminal user 9 via terminal supply water pipe 12, solving the heating / cooling needs of terminal user 9. When the system is replenished with water, the automatic water replenishment valve 8 is opened. The tap water is softened by the water softening equipment 7 and then replenished to the system through the water replenishment pipeline 14.

[0069] The self-draining multi-stage filter box 2 is equipped with a medium-efficiency filter section (stainless steel woven mesh 60-120 mesh) 21 and a high-efficiency filter section (nano filter) 22, which filters impurities in the system through multiple stages to reduce the content of dirt and debris in the system.

[0070] A pressure sensor 28 is installed inside the self-draining multi-stage filter box 2. When the pressure difference between the medium-efficiency filter section 21 and the high-efficiency filter section 22 exceeds a preset threshold, it can detect that the impurity content on the filter screen exceeds the set value. When the impurity content attached to the medium-efficiency filter section 21 or the high-efficiency filter section 22 exceeds the set value, the ultrasonic auxiliary cleaner 27 automatically turns on to remove the impurities on the medium-efficiency filter section 21 and the high-efficiency filter section 22. When the impurity content is lower than the set value, the ultrasonic auxiliary cleaner 27 automatically turns off to prevent filter screen blockage from affecting the normal use of the system.

[0071] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A water source heat pump system with automatic dredging function and anti-blocking function, characterized in that, The system includes a water source heat pump unit (1) and a water supply well (11). A water source pump (6) is installed in the water supply well (11). The water source pump (6) is connected in sequence to the well water outlet pipeline (17), the cyclone sand separator (5), the self-draining multi-stage filter box (2), the water tank outlet pipeline (19), and the water source heat pump unit (1). The outlet of the water source heat pump unit (1) is connected to the well water reinjection pipeline (15) through a pipeline. The well water reinjection pipeline (15) is connected to the return water well (10). The outlet of the water source heat pump unit (1) is also connected to the end user (9) through the terminal water supply pipeline (12). The end user (9) is connected to the inlet of the water source heat pump unit (1) through the terminal return water pipeline (13). A terminal circulating water pump (3) is installed on the terminal return water pipeline (13). The terminal return water pipeline (13) is also connected to an external water replenishment pipeline (14). The self-draining multi-stage filter box (2) includes a box body, in which an inlet area, a filtration area, and a settling area are arranged in sequence. A medium-efficiency filtration section (21) is arranged between the inlet area and the filtration area, and a high-efficiency filtration section (22) is arranged between the filtration area and the settling area. A pressure sensor (28) is arranged at the front end of the medium-efficiency filtration section (21), between the medium-efficiency filtration section (21) and the high-efficiency filtration section (22) in the box body, and after each high-efficiency filtration section (22).

2. The anti-blocking water source heat pump system with automatic unblocking function according to claim 1, characterized in that, The cyclone sand separator (5) is connected to the self-draining multi-stage filter box (2) via a water tank water supply pipe (18), and a solenoid valve is installed on the water tank water supply pipe (18).

3. The anti-blocking water source heat pump system with automatic unblocking function according to claim 1, characterized in that, The water tank outlet pipe (19) is connected to the regulating valve group A through the system circulating water pump outlet pipe (16); the end return water pipe (13) is connected to the regulating valve group A through the end circulating water pump outlet pipe (29).

4. A clog-resistant water source heat pump system with automatic unblocking function as described in claim 1, characterized in that, The terminal water supply pipeline (12) is connected to the outlet of the water source heat pump unit (1) through the regulating valve group B; the well water reinjection pipeline (15) is connected to the outlet of the water source heat pump unit (1) through the regulating valve group B.

5. The anti-blocking water source heat pump system with automatic unblocking function according to claim 1, characterized in that, An inlet (20) and an overflow (26) are provided in the water inlet area. The overflow (26) is located below the inlet (20). Both the inlet (20) and the overflow (26) are located on the side wall of the tank.

6. A clog-resistant water source heat pump system with automatic unblocking function as described in claim 1, characterized in that, An ultrasonic-assisted dirt remover (27) is installed at the bottom of each of the water inlet area, filtration area, and settling area.

7. The anti-blocking water source heat pump system with automatic unblocking function according to claim 1, characterized in that, The bottom of the ultrasonic-assisted cleaning device (27) is equipped with a drain port (25), and the drain port (25) is connected to a drain pipe.

8. The anti-blocking water source heat pump system with automatic unblocking function according to claim 3, characterized in that, The regulating valve group A includes parallel pipelines a and b. Butterfly valve A (30) and butterfly valve H (37) are installed on pipeline a, and butterfly valve B (31) and butterfly valve G (36) are installed on pipeline b. Butterfly valve A (30) and butterfly valve B (31) are installed at one end connected to the outlet pipeline (29) of the terminal circulating water pump, and butterfly valve H (37) and butterfly valve G (36) are installed at one end connected to the outlet pipeline (16) of the system circulating water pump.

9. A clog-resistant water source heat pump system with automatic unblocking function as described in claim 4, characterized in that, The regulating valve group B includes parallel pipelines c and d. Butterfly valves C (32) and F (35) are installed on pipeline c, and butterfly valves D (33) and E (34) are installed on pipeline b. Butterfly valves C (32) and D (33) are installed at the end connected to the terminal water supply pipeline (12), and butterfly valves E (34) and F (35) are installed at the end connected to the well water reinjection pipeline (15).

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