A dirt reverse cleaning system for a water source heat pump unit

Abstract

The utility model discloses a kind of dirt reverse cleaning systems for water source heat pump unit, including two or more water source heat pumps, valve I, valve II and liquid storage tank, liquid storage tank is also provided with cleaning fluid output pipe and cleaning fluid recovery pipe, cleaning fluid output pipe is connected with the wastewater outlet of first water source heat pump, cleaning fluid recovery pipe is connected with the wastewater inlet of last water source heat pump, the wastewater inlet and wastewater outlet remaining in water source heat pump unit are connected, to form a closed loop water source heat pump unit cleaning passage by this. The utility model not only can realize the repeated use of cleaning fluid and save raw material cost, but also can completely realize the cleaning backflush of water source heat pump unit, carry out thorough cleaning and blowdown, can long-term reliable work, system is simple, low in cost, again completely automatic operation, greatly reduce artificial burden.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery and utilization technology in bathing, and specifically relates to a reverse cleaning system for dirt in water source heat pump units. Background Technology

[0002] Water source heat pump units can use bath wastewater as a low-grade heat source to produce domestic hot water, which is a typical waste heat recovery and energy-saving technology. However, during long-term operation, the complex components in the wastewater easily form stubborn fouling on the inner wall of the heat exchanger: calcium and magnesium ions crystallize and precipitate on the heat transfer surface to form a dense scale layer; grease, soap residues, and microbial metabolites mix to form a colloidal adhesive; suspended matter such as hair fibers embeds into the scale layer under turbulent flow, forming a porous composite structure. The thermal resistance coefficient of this mixed fouling can be 3-5 times that of clean pipe walls, resulting in a decrease of about 40% in the evaporator-side heat transfer coefficient and a significant decrease in the system COP value.

[0003] Existing reverse cleaning systems typically only clean single water source heat pump units. Cleaning multiple units requires individual operation, resulting in low efficiency and significant manpower, material, and time costs. Furthermore, traditional cleaning methods struggle to recycle the cleaning solution, leading to large consumption volumes, resource waste, potential environmental pollution, and ineffective removal of contaminants. Therefore, developing a reverse cleaning system applicable to multiple water source heat pump units that enables cleaning solution circulation and thorough contamination removal is of significant practical importance. Utility Model Content

[0004] To address the above technical problems, this utility model provides a backwashing system for water source heat pump units. It is a non-pressurized, closed-loop structure that uses 2 to 4 water source heat pump units as a group. This system not only allows for the reuse of cleaning fluid, saving raw material costs, but also enables complete backwashing of the water source heat pump units for thorough cleaning and waste removal. It can operate reliably for a long time, is simple in design, low in cost, and fully automated, greatly reducing the workload of manual labor.

[0005] The technical solution disclosed in this utility model is as follows:

[0006] A backwashing system for a water source heat pump unit includes two or more water source heat pumps, valve I, valve II, and a storage tank. The number of valves I and II is the same as the number of water source heat pumps. Each water source heat pump has a wastewater outlet and a wastewater inlet. The wastewater inlet is connected to a wastewater inlet pipe. Valve I is installed on the wastewater inlet pipe, and the wastewater outlet is connected to a wastewater outlet pipe. Valve II is installed on the wastewater outlet pipe. The storage tank also has a cleaning fluid output pipe and a cleaning fluid recovery pipe. The cleaning fluid output pipe is connected to the wastewater outlet of the first water source heat pump, and the cleaning fluid recovery pipe is connected to the wastewater inlet of the last water source heat pump. The remaining wastewater inlets and outlets of the water source heat pump unit are connected, thus forming a closed-loop cleaning channel for the water source heat pump unit.

[0007] Preferably, the cleaning fluid output pipe is connected to the position between the wastewater outlet of the first water source heat pump and valve II, thereby realizing the connection between the cleaning fluid output pipe and the wastewater outlet.

[0008] More preferably, it also includes two or more valves III, the specific number of which is the same as the number of water source heat pumps, one of which is installed on the cleaning liquid output pipe, and the other valves III are installed on the wastewater inlet and wastewater outlet connecting pipes.

[0009] More preferably, except for valve III on the cleaning fluid output pipe, the other pipelines containing valve III are connected at one end from the position between the wastewater inlet and valve I, and at the other end from the position between the wastewater outlet and valve II.

[0010] More preferably, it also includes a cleaning pump and valve V, which are connected in series on the pipeline between valve III and the storage tank.

[0011] More preferably, it also includes a cold water tank and valve VI, one end of which is connected to the cold water tank and the other end is connected to the pipeline between the cleaning pump and valve V.

[0012] More preferably, valves I, II, III, VI, and V are all electric valves.

[0013] Preferably, valve IV is installed on the cleaning fluid recovery pipe, and valve IV is located between the wastewater inlet and valve I.

[0014] More preferably, valve IV is an electric valve.

[0015] Preferably, the number of water source heat pump units is 2 to 4.

[0016] Compared with the prior art, the present invention has the following technical advantages:

[0017] (1) This utility model fully considers the compatibility between the cleaning system and the water source heat pump unit, and can be designed as an integrated product. On the one hand, the cleaning system can share some components with the water source heat pump unit, such as some cleaning pipes and connecting parts, which effectively reduces the footprint of the equipment and lowers the overall construction cost. On the other hand, the integrated design makes the cleaning system and the water source heat pump unit more closely integrated, which not only improves the space utilization rate, but also facilitates unified management and maintenance. In addition, valves I, II, III, IV and V can be electric valves, and automated cleaning operation can be achieved through preset control programs. The staff only needs to start the cleaning system with one button, and the cleaning system can complete the cleaning task according to the established process, which greatly reduces the labor intensity. At the same time, the cleaning system also supports manual operation. In special circumstances, the staff can manually control the opening and closing of each valve according to actual needs to ensure the smooth progress of the cleaning work.

[0018] (2) This utility model differs from the traditional single-unit cleaning method. It can simultaneously perform reverse cleaning on two or more water source heat pump units. By constructing a closed-loop cleaning channel, the cleaning fluid flows sequentially through each water source heat pump and circulates within the water source heat pump units, achieving multiple uses. After each cleaning, the cleaning fluid returns to the storage tank through the cleaning fluid recovery pipe and can be reused for the next cleaning after simple treatment. This reduces the consumption of cleaning fluid, saving resources and reducing environmental pollution. At the same time, it realizes the synchronous cleaning of multiple water source heat pumps, significantly shortening the cleaning time, improving cleaning efficiency, and reducing labor costs.

[0019] (3) In this invention, the cleaning fluid continuously circulates in a closed-loop cleaning channel, which can thoroughly clean the pipes of the heat exchanger in the water source heat pump unit. During the circulation process, the cleaning fluid continuously contacts and reacts with the dirt in the pipes, effectively improving the cleaning effect of the dirt and ensuring that the dirt inside the unit is completely removed. This not only improves the heat exchange efficiency of the water source heat pump unit and reduces energy consumption, but also extends the service life of the water source unit, bringing significant economic benefits to users. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the present invention.

[0021] Among them: 1. Water source heat pump I 2. Water source heat pump II 3. Water source heat pump III 4. Water source heat pump IV 5. Valve I 6. Valve II 7. Valve III 8. Valve IV 9. Valve V 10. Wastewater outlet 11. Wastewater inlet 12. Wastewater inlet pipe 13. Wastewater outlet pipe 14. Cleaning fluid output pipe 15. Cleaning fluid recovery pipe 16. Wastewater pump 17. Cleaning pump 18. Intermediate pipeline 19. Storage tank 20. Valve VI 21. Cold water tank. Detailed Implementation

[0022] The present invention will now be further described in conjunction with specific embodiments and accompanying drawings.

[0023] like Figure 1 As shown, this utility model discloses a reverse cleaning system for a water source heat pump unit, comprising four water source heat pumps, four valves I 5, four valves II 6, four valves III 7, and a storage tank 19. Each water source heat pump is provided with a wastewater channel, which has a wastewater outlet 10 and a wastewater inlet 11. The wastewater inlet 11 is connected to a wastewater inlet pipe 12, and valves I 5 and a wastewater pump 16 are installed on the wastewater inlet pipe 12. The wastewater outlet 10 is connected to a wastewater outlet pipe 13, and valves II 6 are installed on the wastewater outlet pipe 13. It also includes a storage tank 19 containing cleaning fluid. The outlet of the storage tank 19 is connected to a cleaning fluid output pipe 14. Valve III 7, valve V 9, and a cleaning pump 17 are respectively installed on the cleaning fluid output pipe 14. The cleaning pump 17 is located between valves III 7 and V 9. Valve V 9 is located close to the storage tank. The other end of the cleaning fluid output pipe 14 is connected to the wastewater outlet pipe 13 between the wastewater outlet 10 of the water source heat pump I 1 and valve II 6. It also includes a cold water tank 21 and a valve VI 20. One end of valve VI 20 is connected to the cold water tank 21, and the other end is connected to the pipeline between the cleaning pump 17 and valve V 9.

[0024] An intermediate pipe 18 connects the wastewater inlet pipe 12 of water source heat pump I 1 and the wastewater outlet pipe 13 of water source heat pump II 2. One end of the intermediate pipe 18 is connected between the wastewater inlet 11 and valve I 5, and the other end is connected between the wastewater outlet 10 and valve II 6. Similarly, the same arrangement is used between water source heat pump II 2 and water source heat pump III 3, and between water source heat pump III 3 and water source heat pump IV 4, with two intermediate pipes 18. The wastewater outlet 10 of water source heat pump IV 4 is connected to the wastewater outlet pipe 13 and also to the cleaning liquid recovery pipe 15. One end of the cleaning liquid recovery pipe 15 is connected to the wastewater inlet pipe 12 between the wastewater inlet 11 and valve I 5 of water source heat pump IV 4, and the other end is connected to the storage tank 19. Valve IV 8 is also installed on the cleaning liquid recovery pipe 15, thus forming a closed-loop cleaning channel for the water source heat pump unit.

[0025] In this utility model, valves I 5, II 6, III 7, IV 8, V 9, and VI 20 are all electric valves, which can switch between manual and automated operation.

[0026] The specific operation method of this utility model is as follows:

[0027] Cleaning Mode: After filling the storage tank 19 with cleaning fluid as required and draining all wastewater from the water source heat pump, open all valves III 7, IV 8, and V 9, and close all valves I 5, II 6, and VI 20. Start the cleaning pump 17 and turn off the wastewater pump 16. The cleaning fluid in the storage tank 19 flows out and sequentially through valve V 9, cleaning pump 17, and valve III 7, then enters the wastewater outlet 10 and wastewater inlet 11 of water source heat pump I 1, the wastewater outlet 10 and wastewater inlet 11 of water source heat pump II 2, the wastewater outlet 10 and wastewater inlet 11 of water source heat pump III 3, and the wastewater outlet 10 and wastewater inlet 11 of water source heat pump IV 4, and then passes through valve IV... 8. Finally, return to the storage tank 19. The cleaning pump 17 needs to be started for 1 hour to allow the cleaning solution to circulate in the cleaning channel for 1 hour. After that, turn off the cleaning pump 17 and allow the cleaning solution to fully soak in the cleaning channel for 4 hours. Then, start the cleaning pump 17 again for 1 hour to allow the cleaning solution to circulate in the cleaning channel for 1 hour. After that, turn off the cleaning pump 17 and allow the cleaning solution to fully soak in the cleaning channel for 4 hours. Then, start the cleaning pump 17 again for 1 hour to allow the cleaning solution to circulate in the cleaning channel for 1 hour. Finally, turn off the cleaning pump 17 and valve V9. To prepare for cleaning solution recovery, open valve VI 20 and start the cleaning pump 17 to send clean water into the cleaning channel, thereby flushing the cleaning solution in the cleaning channel into the storage tank 19. When the liquid level in the storage tank 19 returns to near full, close the cleaning pump 17 and valve VI 20. The entire cleaning process is now complete.

[0028] Hot water production mode: Close all valves III 7, IV 8, V 9 and VI 20, open all valves I 5 and II 6, turn off cleaning pump 17, and turn on wastewater pump 16. The four water source heat pumps operate independently to produce hot water. Bathing wastewater enters wastewater inlet 11, wastewater outlet 10 and valve II 6 in sequence through valve I 5 and then flows out. This completes the heat release of bathing wastewater in the water source heat pump. The released heat is used to heat the clean water entering the water source heat pump. This is the conventional hot water production operation of the water source heat pump and will not be explained further here.

Claims

1. A backwashing system for a water source heat pump unit, characterized in that: It includes two or more water source heat pumps, valve I, valve II, and a storage tank. The number of valves I and II is the same as the number of water source heat pumps. Each water source heat pump is equipped with a wastewater outlet and a wastewater inlet. The wastewater inlet is connected to a wastewater inlet pipe. Valve I is installed on the wastewater inlet pipe, and the wastewater outlet is connected to a wastewater outlet pipe. Valve II is installed on the wastewater outlet pipe. The storage tank is also equipped with a cleaning fluid output pipe and a cleaning fluid recovery pipe. The cleaning fluid output pipe is connected to the wastewater outlet of the first water source heat pump, and the cleaning fluid recovery pipe is connected to the wastewater inlet of the last water source heat pump. The remaining wastewater inlets and outlets in the water source heat pump unit are connected, thus forming a closed-loop cleaning channel for the water source heat pump unit.

2. The backwashing system for a water source heat pump unit according to claim 1, characterized in that: The cleaning fluid output pipe is connected to the wastewater outlet of the first water source heat pump and valve II, thereby connecting the cleaning fluid output pipe to the wastewater outlet.

3. The backwashing system for a water source heat pump unit according to claim 2, characterized in that: It also includes two or more valves III, the specific number of which is the same as the number of water source heat pumps. One valve III is installed on the cleaning liquid output pipe, and the other valves III are installed on the wastewater inlet and wastewater outlet connecting pipes.

4. The backwashing system for a water source heat pump unit according to claim 3, characterized in that: Excluding valve III on the cleaning fluid output pipe, the remaining pipelines containing valve III are connected at one end between the wastewater inlet and valve I, and at the other end between the wastewater outlet and valve II.

5. A backwashing system for a water source heat pump unit according to claim 3, characterized in that: It also includes a cleaning pump and valve V, which are connected in series on the pipeline between valve III and the storage tank.

6. The backwashing system for a water source heat pump unit according to claim 5, characterized in that: It also includes a cold water tank and valve VI, one end of which is connected to the cold water tank and the other end is connected to the pipeline between the cleaning pump and valve V.

7. A backwashing system for a water source heat pump unit according to claim 6, characterized in that: Valve I, Valve II, Valve III, Valve VI, and Valve V are all electric valves.

8. The backwashing system for a water source heat pump unit according to claim 1, characterized in that: Valve IV is installed on the cleaning fluid recovery pipe, and valve IV is located between the wastewater inlet and valve I.

9. A backwashing system for a water source heat pump unit according to claim 8, characterized in that: Valve IV is an electric valve.

10. A backwashing system for a water source heat pump unit according to claim 1, characterized in that: The number of water source heat pump units is 2 to 4.

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