Heat source tower heat pump concentration control system and assembly

Abstract

The application provides a heat source tower heat pump concentration control system and assembly, which comprises an inlet pipe, a filter device, an outlet pipe, a liquid discharge pipe, a first liquid delivery pipe, a second liquid delivery pipe, a water delivery pipe, a sewage discharge pipe, a gas delivery pipe and a controller.

Description

Technical Field

[0001] The present invention relates to the technical field of heat source tower heat pumps, and in particular to a heat source tower heat pump concentration control system and an assembly. Background Art

[0002] Currently, heat source tower heat pump systems are widely used as winter heating sources in regions of my country with hot summers and cold winters. These systems require real-time control of antifreeze concentration during operation. This process involves processes such as antifreeze recovery, filling, filtration, and water replenishment. The traditional solution is to design independent pipeline systems to achieve different goals for each process. However, this approach requires laying a large number of pipelines, resulting in complex design, difficult construction, large floor space requirements, and lengthy operation times. Summary of the Invention

[0003] In view of this, the present invention provides a heat source tower heat pump concentration control system and assembly to solve the above technical problems.

[0004] The heat source tower heat pump concentration control system provided by the present invention includes:

[0005] a liquid inlet pipe, wherein a first end of the liquid inlet pipe is used to communicate with the liquid outlet of the heat source tower, and a first valve is installed on the liquid inlet pipe;

[0006] a filter device, wherein the liquid inlet of the filter device is connected to the second end of the liquid inlet pipe, and the liquid inlet pipe is equipped with a solution pump between the first valve and the filter device;

[0007] a liquid outlet pipe, wherein a first end of the liquid outlet pipe is used to communicate with the liquid inlet of the heat source tower, a densitometer is installed in parallel on the liquid outlet pipe, manual valves are installed at both ends of the densitometer, and a second valve is installed on the liquid outlet pipe;

[0008] a drain pipe, wherein a first end of the drain pipe is connected to the liquid outlet of the filter device, a second end of the drain pipe is used to communicate with the dilute solution tank, a third valve is installed on the drain pipe, and the second end of the liquid outlet pipe is connected to the drain pipe between the filter device and the third valve;

[0009] a first liquid feeding pipe, wherein a first end of the first liquid feeding pipe is connected to the liquid discharge pipe between the third valve and the dilute solution tank, a second end of the first liquid feeding pipe is connected to the liquid inlet pipe between the first valve and the solution pump, and a fourth valve is installed on the first liquid feeding pipe;

[0010] a second liquid feeding pipe, wherein a first end of the second liquid feeding pipe is connected to the concentrated solution tank, a second end of the second liquid feeding pipe is connected to the liquid inlet pipe between the first valve and the solution pump, and a fifth valve is installed on the second liquid feeding pipe;

[0011] a water supply pipe, wherein a first end of the water supply pipe is used to connect to a water source, a second end of the water supply pipe is connected to the liquid inlet pipe between the first valve and the solution pump, and a sixth valve is installed on the water supply pipe;

[0012] a sewage pipe, the sewage pipe being connected to the sewage outlet of the filter device, and a seventh valve being installed on the sewage pipe;

[0013] an air supply pipe, the air supply pipe being in communication with the filtering device and having an eighth valve installed thereon;

[0014] A controller, wherein the input end of the controller is communicatively connected to the output end of the densitometer, and the output end of the controller is communicatively connected to the control end of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve and the solution pump.

[0015] Optionally, a pipeline filter is installed on the liquid inlet pipe.

[0016] Optionally, the heat source tower heat pump concentration control system further includes:

[0017] a pressure differential switch, wherein a first detection end of the pressure differential switch is connected to an input end of the pipeline filter, a second detection end of the pressure differential switch is connected to an output end of the pipeline filter, and an output end of the pressure differential switch is communicatively connected to an input end of the controller;

[0018] An alarm, wherein the input end of the alarm is communicatively connected to the output end of the controller.

[0019] Optionally, a flow switch is installed on the sewage pipe, and the output end of the flow switch is communicatively connected to the input end of the controller.

[0020] Optionally, a first one-way valve is installed on the liquid inlet pipe.

[0021] Optionally, the heat source tower heat pump concentration control system further includes:

[0022] A merging pipe, wherein the first end of the merging pipe is connected to the liquid inlet pipe between the first valve and the solution pump, the second end of the merging pipe is respectively connected to the second end of the first liquid delivery pipe, the second end of the second liquid delivery pipe and the second end of the water delivery pipe, and a second one-way valve is installed on the merging pipe.

[0023] Optionally, the filtering device includes a purification tank, a first mounting plate, a second mounting plate and a filter cartridge;

[0024] The purification tank is provided with a receiving cavity;

[0025] The first mounting plate is fixedly connected to the inner wall of the accommodating cavity in a circumferential direction and is penetrated by a first through hole;

[0026] The circumference of the second mounting plate is fixedly connected to the inner wall of the accommodating cavity and is penetrated by a second through hole;

[0027] The filter cartridge is provided with a communication cavity along its extension direction, and opposite ends of the filter cartridge in the extension direction are fixedly connected to the first mounting plate and the second mounting plate on opposite sides thereof, respectively, and the first through hole, the communication cavity and the second through hole are connected to each other;

[0028] The second end of the liquid inlet pipe is in communication with the accommodating cavity on the side of the first mounting plate facing away from the second mounting plate;

[0029] The first end of the drain pipe is in communication with the accommodating cavity between the first mounting plate and the second mounting plate;

[0030] The sewage discharge pipe is communicated with the accommodating cavity on the side of the second mounting plate facing away from the first mounting plate.

[0031] Optionally, the filtering device further includes a cleaning component, and the cleaning component includes:

[0032] driving parts;

[0033] a transmission shaft, the transmission shaft being in driving connection with the output shaft of the driving member and extending into the filter cartridge;

[0034] A cleaning brush is connected to the transmission shaft and abuts against the filter cartridge.

[0035] The present invention also provides a heat source tower heat pump concentration control assembly, comprising a heat source tower, a dilute solution tank and a concentrated solution tank, and also comprising any of the above-mentioned heat source tower heat pump concentration control systems.

[0036] Optionally, a liquid level meter is provided in the heat source tower for monitoring the liquid level of the antifreeze liquid in the heat source tower, and the output end of the liquid level meter is communicatively connected to the input end of the controller of the heat pump concentration control system of the heat source tower.

[0037] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects:

[0038] By adopting the heat source tower heat pump concentration control system and assembly of the present invention, all functions such as solution concentration adjustment, solution filtration and purification, solution recovery and filling, and water replenishment can be realized through one system, thereby improving system working efficiency, reducing floor space, and lowering design difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a heat source tower heat pump concentration control system according to one embodiment of the present invention;

[0040] Figure 2 for Figure 1 Schematic diagram of the filtering device of the heat source tower heat pump concentration control system shown;

[0041] Figure 3 for Figure 2 AA sectional view of the filtering device shown.

[0042] Reference numerals:

[0043] 1: Liquid inlet pipe; 2: Filter device; 201: Purification tank; 202: First mounting plate; 203: Second mounting plate; 204: Filter cartridge; 205: Cleaning assembly; 2051: Driving element; 2052: Drive shaft; 2053: Cleaning brush; 206: Fixing bracket; 3: Liquid outlet pipe; 4: Drain pipe; 5: First liquid delivery pipe; 6: Second liquid delivery pipe; 7: Water delivery pipe; 8: Drain pipe; 9: Air delivery pipe; 10: First valve; 11: Solution Pump; 12: Density meter; 13: Manual valve; 14: Second valve; 15: Third valve; 16: Fourth valve; 17: Fifth valve; 18: Sixth valve; 19: Seventh valve; 20: Eighth valve; 21: Pipeline filter; 22: Pressure differential switch; 23: Flow switch; 24: First one-way valve; 25: Junction pipe; 26: Second one-way valve; 27: Heat source tower; 28: Dilute solution tank; 29: Concentrated solution tank; 30: Sewage tank. DETAILED DESCRIPTION

[0044] The embodiments of the present invention will be further described below with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0045] Figure 1 Schematic diagram of a heat source tower heat pump concentration control system according to an embodiment of the present invention. Figure 1 As shown, the heat source tower heat pump concentration control system includes a liquid inlet pipe 1, a filter device 2, a liquid outlet pipe 3, a liquid discharge pipe 4, a first liquid delivery pipe 5, a second liquid delivery pipe 6, a water delivery pipe 7, a sewage discharge pipe 8, an air delivery pipe 9 and a controller.

[0046] A first end of the liquid inlet pipe 1 is used to communicate with the liquid outlet of the heat source tower 27, and a first valve 10 is installed on the liquid inlet pipe 1; the liquid inlet of the filtering device 2 is communicated with the second end of the liquid inlet pipe 1, and a solution pump 11 is installed on the liquid inlet pipe 1 between the first valve 10 and the filtering device 2; a first end of the liquid outlet pipe 3 is used to communicate with the liquid inlet of the heat source tower 27, a densitometer 12 is installed in parallel on the liquid outlet pipe 3, manual valves 13 are installed at both ends of the densitometer 12, and a second valve 14 is installed on the liquid outlet pipe 3; a first end of the liquid discharge pipe 4 is communicated with the liquid outlet of the filtering device 2, a second end of the liquid discharge pipe 4 is used to communicate with the dilute solution tank 28, a third valve 15 is installed on the liquid discharge pipe 4, and a second end of the liquid discharge pipe 3 is communicated with the liquid discharge pipe 4 between the filtering device 2 and the third valve 15; a first end of the first liquid feeding pipe 5 is communicated with the liquid discharge pipe 4 between the third valve 15 and the dilute solution tank 28, and a second end of the first liquid feeding pipe 5 is connected to the liquid inlet pipe 1 between the first valve 10 and the solution pump 11 The first liquid delivery pipe 5 is connected, and a fourth valve 16 is installed on the first liquid delivery pipe 5; the first end of the second liquid delivery pipe 6 is used to be connected with the concentrated solution tank 29, the second end of the second liquid delivery pipe 6 is connected with the liquid inlet pipe 1 between the first valve 10 and the solution pump 11, and the second liquid delivery pipe 6 is installed with a fifth valve 17; the first end of the water delivery pipe 7 is used to connect with the water source, the second end of the water delivery pipe 7 is connected with the liquid inlet pipe 1 between the first valve 10 and the solution pump 11, and the water delivery pipe 7 is installed with a sixth valve 18; the sewage pipe 8 is connected with the sewage outlet of the filtering device 2, and a seventh valve 19 is installed on the sewage pipe 8; the air delivery pipe 9 is connected with the filtering device 2, and an eighth valve 20 is installed on the air delivery pipe 9; the input end of the controller is communicatively connected with the output end of the density meter 12, and the output end of the controller is communicatively connected with the first valve 10, the second valve 14, the third valve 15, the fourth valve 16, the fifth valve 17, the sixth valve 18, the seventh valve 19, the eighth valve 20 and the control end of the solution pump 11.

[0047] During use, the inlet pipe 1 is connected to the outlet of the heat source tower 27 via a main pipe, the outlet pipe 3 is connected to the inlet of the heat source tower 27 via a main pipe, and the drain pipe 4 is connected to the dilute solution tank 28, which stores antifreeze of the appropriate concentration required for the normal operation of the heat source tower heat pump. The first liquid supply pipe 5 is connected to the dilute solution tank 28, and the second liquid supply pipe 6 is connected to the concentrated solution tank 29, which stores antifreeze with a relatively high concentration. The water supply pipe 7 is connected to a pressurized water source, such as municipal tap water. The density meter 12 monitors the concentration of the solution flowing through it in real time and transmits the concentration data to the controller. The controller has pre-stored high and low concentration thresholds and compares the received concentration data with the high and low concentration thresholds.

[0048] When the system needs to be shut down, the controller controls the system to be in a shutdown mode. Specifically, the controller controls the first valve 10 to the eighth valve 20 to be in a closed state, and controls the solution pump 11 to be in a shut-down state.

[0049] When the heat source tower heat pump is in normal working state, and the concentration data of the antifreeze solution flowing through monitored by the density meter 12 is between the high concentration threshold and the low concentration threshold, that is, the normal working requirements of the heat source tower heat pump are met, and at the same time, the liquid level height in the heat source tower 27 also meets the normal operating requirements, the controller controls the system in the solution purification mode. Specifically, the controller controls the first valve 10 and the second valve 14 to open, and controls the third valve 15 to the eighth valve 20 to close, and then controls the solution pump 11 to start. Figure 1 As shown, driven by solution pump 11, the solution in heat source tower 27 enters filter device 2 through liquid inlet pipe 1. After impurities are filtered out, the solution is discharged from filter device 2 to drain pipe 4, further flows into liquid inlet pipe 1, and finally flows back into heat source tower 27, forming a closed loop. During this process, the solution in the loop is filtered and purified only when it flows through filter device 2, and the concentration and total flow rate of the antifreeze solution are not adjusted.

[0050] When the liquid level in the heat source tower 27 is too high, part of the solution needs to be discharged. At this time, the controller controls the system in the dilute solution recovery mode. Specifically, the controller controls the first valve 10 and the third valve 15 to be in the open state, and controls the second valve 14 and the fourth valve 16 to the eighth valve 20 to be in the closed state. After starting the solution pump 11, the solution in the heat source tower 27 flows into the liquid inlet pipe 1, flows into the drain pipe 4 after passing through the filtering device 2, and finally flows into the dilute solution tank 28 connected to the drain pipe 4 for recovery and storage.

[0051] When the antifreeze concentration monitored by the densitometer 12 is lower than the low concentration threshold, first, it is necessary to discharge a portion of the dilute solution with too low concentration in the heat source tower 27 and the system pipeline to provide space for the subsequent filling of concentrated solution. That is, the controller first controls the system to be in the dilute solution recovery mode, controls the first valve 10 and the third valve 15 to be open, and controls the second valve 14 and the fourth valve 16 to the eighth valve 20 to be in the closed state. The solution in the heat source tower 27 flows through the liquid inlet pipe 1, the filter device 2 and the drain pipe 4, and is finally discharged to the dilute solution tank 28. When the liquid level in the heat source tower 27 reaches a certain low value, the controller controls the system to be in concentrated solution filling mode, injects high-concentration solution into the system pipeline to mix with the low-concentration solution in the pipeline and in the heat source tower 27, and obtains a dilute solution of appropriate concentration required for the normal operation of the heat source tower 27. Specifically, the controller controls the second valve 14 and the fifth valve 17 to open, controls the first valve 10, the third valve 15, the fourth valve 16 and the sixth valve 18 to the eighth valve 20 to close, and starts the solution pump 11. Then, under the driving action of the solution pump 11, the high-concentration solution in the concentrated solution tank 29 enters the liquid inlet pipe 1 through the second liquid delivery pipe 6, and enters the liquid discharge pipe 4 after being filtered by the filter device 2, and finally flows into the heat source tower 27 connected thereto through the liquid outlet pipe 3.

[0052] When the antifreeze concentration in the system pipeline meets the normal working requirements, but the liquid level in the heat source tower 27 is too low, the controller controls the system to be in the dilute solution filling mode. Specifically, the controller controls the second valve 14 and the fourth valve 16 to open, controls the first valve 10, the third valve 15 and the fifth valve 17 to the eighth valve 20 to close, and starts the solution pump 11. The dilute solution of appropriate concentration in the dilute solution tank 28 is output to the liquid inlet pipe 1 through the first liquid delivery pipe 5, enters the liquid discharge pipe 4 after being filtered by the filter device 2, and finally flows into the heat source tower 27 connected thereto through the liquid outlet pipe 3. This mode continues until the liquid level in the heat source tower 27 returns to the liquid level range required for the normal operation of the heat source tower 27.

[0053] When the concentration of antifreeze in the system pipeline meets the normal working requirements, but the liquid level in the heat source tower 27 is too low, and the liquid level in the dilute solution tank 28 is also too low, and cannot meet the requirements of filling enough dilute solution into the system pipeline, the controller controls the system in water filling mode. Specifically, the controller controls the second valve 14 and the sixth valve 18 to open, and at the same time controls the first valve 10, the third valve 15 to the fifth valve 17, the seventh valve 19 and the eighth valve 20 to be closed. Then, the pressurized water source enters the liquid inlet pipe 1 through the water supply pipe 7, flows through the filter device 2 and then enters the drain pipe 4, and finally enters the liquid outlet pipe 3 and flows into the heat source tower 27 connected thereto, thereby replenishing the fluid in the system and keeping the liquid level in the heat source tower 27 within the height range required for normal operation.

[0054] When the filter device 2 has been used for too long and needs to be cleaned, the controller controls the system to be in the cleaning and sewage discharge mode. Specifically, the controller controls the solution pump 11 to stop, controls the second valve 14 and the sixth valve 18 to be opened, and controls the first valve 10, the third valve 15 to the fifth valve 17, the seventh valve 19 and the eighth valve 20 to be closed. Then the pressurized water source enters the liquid inlet pipe 1 through the water supply pipe 7, and pushes the antifreeze in the liquid inlet pipe 1, the filter device 2 and the liquid outlet pipe 3 to flow into the heat source tower 27. After this state is delayed for a first time period, for example 30s, most of the antifreeze in the liquid inlet pipe 1, the filter device 2 and the liquid outlet pipe 3 flows into the heat source tower 27. At this time, the controller controls the second valve 14 to be closed, and controls the seventh valve 19 to be opened. At this time, the main component in the pipeline is water, and the pressurized water source is continuously injected. The water flow with force, then the water flows through the water supply pipe 7, through the liquid inlet pipe 1 and into the filter device 2, flushing the inside of the filter device 2, and the sewage and impurities after flushing enter the connected sewage pipe 8 through the sewage outlet and are discharged through the sewage pipe 8. In order to facilitate the collection of sewage, the sewage tank 30 can be connected to the end of the sewage pipe 8. After this state lasts for a second time period, for example 30s, the filter device 2 is flushed clean. At this time, the controller controls the sixth valve 18 to close, and no water source is introduced. The eighth valve 20 is controlled to open to connect to the atmosphere, so that the water flow in the filter device 2 can smoothly enter the sewage pipe 8 through the sewage outlet and be discharged through the sewage pipe 8. After this state lasts for a third time period, for example 50s, the water flow in the filter device 2 is drained. At this time, the controller controls the seventh valve 19 and the eighth valve 20 to close, and the cleaning and sewage discharge mode ends.

[0055] After the winter heating mode ends, the antifreeze in the system needs to be recovered to the dilute solution tank 28. At this time, the controller control system is in the seasonal recovery mode. Specifically, the controller controls the first valve 10 and the third valve 15 to open, controls the second valve 14, the fourth valve 16 to the eighth valve 20 to close, and controls the solution pump 11 to start. Then, the solution in the heat source tower 27 and the pipeline enters the filter device 2 through the liquid inlet pipe 1, and then enters the dilute solution tank 28 through the liquid discharge pipe 4. When the liquid level in the dilute solution tank 28 stops rising for a certain period of time, for example, within five minutes, it is judged that the solution recovery is completed, the controller controls the solution pump 11 to stop, and controls the first valve 10 and the third valve 15 to close, thereby completing the recovery of the antifreeze.

[0056] Before winter heating begins, antifreeze needs to be filled into the system, and the controller controls the system in seasonal filling mode. Specifically, the controller controls the second valve 14 and the fourth valve 16 to open, controls the first valve 10, the third valve 15, and the fifth valve 17 to the eighth valve 20 to close, and controls the solution pump 11 to start. The antifreeze in the dilute solution tank 28 enters the liquid inlet pipe 1 through the first liquid delivery pipe 5, and then enters the liquid discharge pipe 4 through the filter device 2, and finally enters the heat source tower 27 through the liquid outlet pipe 3. When the solution level in the heat source tower 27 is higher than the minimum liquid level for the normal operation of the system, it is judged that the solution filling is complete. At this time, the controller controls the solution pump 11 to stop, and controls the second valve 14 and the fourth valve 16 to close.

[0057] During system assembly, the densitometer 12 must be installed on a vertical section of the liquid outlet pipe 3, with a length of at least 1.5 meters and a flow rate of less than 1 m / s. If the densitometer 12 malfunctions and requires repair or replacement, the operator can close the manual valves 13 on either side of the densitometer 12 to prevent antifreeze from flowing through it. During this time, the densitometer 12 can be removed for repair or replacement without affecting the normal operation of the system.

[0058] The controller uses a control cabinet. A level gauge is installed inside the heat source tower 27 to monitor the antifreeze level within the tower. A level gauge is also installed inside the dilute solution tank 28 to monitor the level within the dilute solution tank. The control cabinet includes a reserved electrical interface for connecting to the level gauges within the heat source tower 27, the dilute solution tank 28, and the centralized control system. When the system receives a remote run command or presses the start button on the control cabinet, it starts running. When the system receives a remote shutdown command or presses the stop button on the control cabinet, it enters shutdown mode. The system automatically switches operating modes based on the operating conditions of the heat source tower heat pump system, dynamically adjusting the antifreeze concentration to ensure safe and stable operation of the heat source tower heat pump system.

[0059] By adopting the heat source tower heat pump concentration control system of the present invention, all functions such as solution concentration adjustment, solution filtration and purification, solution recovery and filling, and water replenishment can be realized through one system, thereby improving system working efficiency, reducing floor space, and lowering design difficulty.

[0060] The filter device 2 can adopt any structural form, as long as it can filter and purify the solution flowing through it, output the filtered solution to the drain pipe 4, and discharge the filtered impurities to the sewage pipe 8.

[0061] The controller controls the opening and closing of each valve and the start and stop of the solution pump 11 based on the antifreeze concentration data monitored by the density meter 12 and the respective liquid level data monitored by the liquid level gauges in the heat source tower 27 and the dilute solution tank 28. This integrated information can be implemented according to the existing mature algorithm, and its specific working principle will not be repeated here.

[0062] Optionally, a line filter 21 is installed on the liquid inlet pipe 1. This arrangement performs preliminary filtration on the solution flowing through the liquid inlet pipe 1, so that larger impurities in the solution are intercepted, thereby reducing the working pressure of the filter device 2. The two cooperate to perform double filtration to ensure the filtering effect of impurities in the solution.

[0063] like Figure 1 As shown, in this embodiment, the pipeline filter 21 is installed between the first valve 10 and the solution pump 11 on the liquid inlet pipe 1. According to actual application conditions, the specific installation position of the pipeline filter 21 on the liquid inlet pipe 1 and the specific specifications and models can be adjusted.

[0064] Optionally, the heat source tower heat pump concentration control system also includes a pressure differential switch 22 and an alarm (not shown). The first detection end of the pressure differential switch 22 is connected to the input end of the pipeline filter 21, the second detection end of the pressure differential switch 22 is connected to the output end of the pipeline filter 21, and the output end of the pressure differential switch 22 is communicatively connected to the input end of the controller; the input end of the alarm is communicatively connected to the output end of the controller. With this arrangement, if the pressure differential across the pipeline filter 21 is detected to be excessive, indicating that the pipeline filter 21 is clogged, the alarm will sound an alarm to ensure normal system operation, prompting the operator to inspect or replace it.

[0065] The differential pressure switch 22 monitors the differential pressure across the pipeline filter 21 and transmits this data in real time to the controller. The controller has a pre-set differential pressure stored within it. When the differential pressure received by the controller is greater than or equal to the set differential pressure, it indicates that the pipeline filter 21 is clogged, and the controller controls the alarm to sound an alarm. The alarm can be a text alarm, a voice alarm, or a light alarm, or a combination of these. The pipeline filter 21 can be a commercially available model that matches the inlet pipe 1. The controller controls the alarm's control logic based on the comparison of the received differential pressure data with the set differential pressure, which can be implemented using existing, proven algorithms.

[0066] Optionally, a flow switch 23 is installed on the drain pipe 8, and the output of the flow switch 23 is communicatively connected to the input of the controller. The flow switch 23 monitors the flow rate through the drain pipe 8 in real time. When the seventh valve 19 is closed and the flow rate data shows a certain value, it indicates that the seventh valve 19 is faulty and cannot block the drain pipe 8. At this time, the controller controls the alarm to sound an alarm, prompting the operator to replace the seventh valve 19 in time to prevent antifreeze leakage.

[0067] The flow data monitored by the flow switch 23 is transmitted to the controller in real time. The controller has a set flow pre-stored inside, for example, the set flow is zero. When the seventh valve 19 is in the closed state and the flow data received by the controller is greater than or equal to the set flow, it indicates that the seventh valve 19 is faulty and solution leakage has occurred when the sewage pipe 8 needs to be blocked.

[0068] Optionally, a first one-way valve 24 is installed on the liquid inlet pipe 1. The first one-way valve 24 is provided to prevent the solution flowing through the liquid inlet pipe 1 from flowing back.

[0069] like Figure 1 As shown, the first one-way valve 24 is installed between the solution pump 11 and the filtering device 2 on the liquid inlet pipe 1.

[0070] Optionally, the heat source tower heat pump concentration control system further includes a confluence pipe 25, the first end of which is in communication with the liquid inlet pipe 1 between the first valve 10 and the solution pump 11, and the second end of which is in communication with the second end of the first liquid delivery pipe 5, the second end of the second liquid delivery pipe 6, and the second end of the water delivery pipe 7, respectively. A second one-way valve 26 is installed on the confluence pipe 25. This arrangement, by virtue of the confluence pipe 25, prevents the fluids in the first liquid delivery pipe 5, the second liquid delivery pipe 6, and the water delivery pipe 7 from flowing back into the liquid inlet pipe 1.

[0071] like Figure 1 As shown, the upper end of the merging pipe 25 is connected to the liquid inlet pipe 1 , and the lower end is connected to the intersection of the first liquid delivery pipe 5 , the second liquid delivery pipe 6 and the water delivery pipe 7 .

[0072] Figure 2 for Figure 1 The schematic diagram of the filter device 2 of the heat source tower heat pump concentration control system is shown. Figure 2 As shown, optionally, the filtering device 2 includes a purification tank 201, a first mounting plate 202, a second mounting plate 203 and a filter cartridge 204; a accommodating chamber is provided in the purification tank 201; the first mounting plate 202 is fixedly connected to the inner wall of the accommodating chamber in the circumference, and a first through hole is provided through it; the second mounting plate 203 is fixedly connected to the inner wall of the accommodating chamber in the circumference, and a second through hole is provided through it; the filter cartridge 204 is provided with a connecting chamber along the extension direction, and the opposite ends of the filter cartridge 204 in the extension direction are respectively fixedly connected to the sides facing each other of the first mounting plate 202 and the second mounting plate 203, and the first through hole, the connecting chamber and the second through hole are connected to each other; the second end of the liquid inlet pipe 1 is connected to the accommodating chamber on the side of the first mounting plate 202 facing away from the second mounting plate 203; the first end of the liquid discharge pipe 4 is connected to the accommodating chamber between the first mounting plate 202 and the second mounting plate 203; the sewage pipe 8 is connected to the accommodating chamber on the side of the second mounting plate 203 facing away from the first mounting plate 202. This arrangement makes the filter device 2 simple in structure, easy to operate and high in filtering efficiency.

[0073] like Figure 2 As shown, in this embodiment, the purification tank 201 is a hollow cylinder as a whole, and a converging arc is provided at the bottom. The first mounting plate 202 and the second mounting plate 203 are both arranged in a circular shape, and are fixedly connected to the inner wall of the purification tank 201 in the circumferential direction. The first mounting plate 202 is arranged above the second mounting plate 203, and the filter cartridge 204 is a hollow cylinder, the upper end of which is connected to the first mounting plate 202, and the lower end is connected to the second mounting plate 203. The purification tank 201 is provided with a liquid inlet above the first mounting plate 202 to connect to the liquid inlet pipe 1, a liquid outlet is provided on the side wall of the corresponding filter cartridge 204 to connect to the drain pipe 4, and a sewage outlet is provided at the bottom end of the purification tank 201 to connect to the sewage outlet 8. The solution flowing into the purification tank 201 through the liquid inlet enters the filter cartridge 204 through the first through hole on the first mounting plate 202, is filtered by the filter cartridge 204, and is discharged into the space between the filter cartridge 204 and the inner wall of the purification tank 201, and is discharged into the sewage outlet 4. At the same time, the filtered impurities fall to the bottom of the purification tank 201 through the second through hole on the second mounting plate 203. After the filtering device 2 has been running for a certain period of time, the seventh valve 19 is opened, and the impurities enter the sewage outlet 8 and are finally discharged.

[0074] Figure 3 for Figure 2 The AA cross-sectional view of the filter device 2 is shown. Figure 2 and Figure 3 As shown, the filter device 2 optionally further includes a cleaning assembly 205, which includes a drive member 2051, a transmission shaft 2052, and a cleaning brush 2053. The transmission shaft 2052 is drivingly connected to the output shaft of the drive member 2051 and extends into the filter cartridge 204. The cleaning brush 2053 is connected to the transmission shaft 2052 and abuts against the filter cartridge 204. The cleaning assembly 205 is provided to regularly clean the inner wall of the filter cartridge 204 to prevent the filter mesh of the filter cartridge 204 from being clogged by impurities, which could affect the filtration effect and even the normal operation of the system.

[0075] In this embodiment, the driving member 2051 is a motor, fixed to the top exterior of the purification tank 201. Its output shaft passes through the purification tank 201 and is connected to a transmission shaft 2052. The transmission shaft 2052 extends within the filter cartridge 204 to its bottom end and is circumferentially fixedly connected to a cleaning brush 2053. In this embodiment, the cleaning brush 2053 includes a connecting plate directly connected to the transmission shaft 2052 and bristles mounted on the surface of the connecting plate at the end away from the transmission shaft 2052. The bristles abut the inner wall of the filter cartridge 204. When the filter cartridge 204 needs to be cleaned, the driving member 2051 is started, and the driving member 2051 drives its output shaft to rotate, thereby driving the transmission shaft 2052 and the cleaning brush 2053 connected thereto to rotate. During the rotation of the cleaning brush 2053, the bristles clean the inner wall of the filter cartridge 204 that is in contact with it, and the impurities attached to the inner wall of the filter cartridge 204 are cleaned and fall to the bottom of the purification tank 201. After the filter device 2 has been running for a certain period of time, the seventh valve 19 is opened, and the impurities enter the sewage pipe 8 through the sewage outlet and are finally discharged.

[0076] In order to ensure the stable rotation of the transmission shaft 2052, a fixing frame 206 is provided. Figure 3 As shown, the fixing frame 206 is fixedly connected to the inner wall of the first mounting plate 202, and the transmission shaft 2052 passes through the center of the fixing frame 206 and extends to the inside of the filter cartridge 204. Under the limiting effect of the fixing frame 206, the transmission shaft 2052 is prevented from shaking in the horizontal direction.

[0077] The present invention also provides a heat source tower heat pump concentration control assembly, including a heat source tower 27, a dilute solution tank 28 and a concentrated solution tank 29, and also includes the heat source tower heat pump concentration control system described in any of the above embodiments.

[0078] By adopting the heat source tower heat pump concentration control assembly of the present invention, all functions such as solution concentration adjustment, solution filtration and purification, solution recovery and filling, and water replenishment can be achieved through a set of systems, thereby improving work efficiency, reducing floor space, and lowering design difficulty.

[0079] Optionally, a liquid level meter is provided in the heat source tower 27 for monitoring the liquid level of the antifreeze liquid in the heat source tower 27 , and the output end of the liquid level meter is communicatively connected to the input end of the controller of the heat source tower heat pump concentration control system.

[0080] The liquid level meter monitors the liquid level of the antifreeze in the heat source tower 27 in real time and transmits the liquid level data to the controller in real time. The controller has pre-stored high and low thresholds. When the liquid level in the heat source tower 27 is between the high and low thresholds, the system can operate normally. When the liquid level in the heat source tower 27 is higher than the high threshold, some antifreeze needs to be discharged. When the liquid level in the heat source tower 27 is lower than the low threshold, antifreeze needs to be replenished.

[0081] A liquid level gauge can also be set in the dilute solution tank 28 to monitor the liquid level height in the dilute solution tank 28 and transmit the liquid level data to the controller. The controller integrates the liquid level data in the dilute solution tank 28, the liquid level data in the heat source tower 27, and the concentration data of the antifreeze in the pipeline to comprehensively determine which working mode the system should be in.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat source tower heat pump concentration control system, characterized in that: include: a liquid inlet pipe, wherein a first end of the liquid inlet pipe is used to communicate with the liquid outlet of the heat source tower, and a first valve is installed on the liquid inlet pipe; a filter device, wherein the liquid inlet of the filter device is connected to the second end of the liquid inlet pipe, and the liquid inlet pipe is equipped with a solution pump between the first valve and the filter device; a liquid outlet pipe, wherein a first end of the liquid outlet pipe is used to communicate with the liquid inlet of the heat source tower, a densitometer is installed in parallel on the liquid outlet pipe, manual valves are installed at both ends of the densitometer, and a second valve is installed on the liquid outlet pipe; a drain pipe, wherein a first end of the drain pipe is connected to the liquid outlet of the filter device, a second end of the drain pipe is used to communicate with the dilute solution tank, a third valve is installed on the drain pipe, and the second end of the liquid outlet pipe is connected to the drain pipe between the filter device and the third valve; a first liquid feeding pipe, wherein a first end of the first liquid feeding pipe is connected to the liquid discharge pipe between the third valve and the dilute solution tank, a second end of the first liquid feeding pipe is connected to the liquid inlet pipe between the first valve and the solution pump, and a fourth valve is installed on the first liquid feeding pipe; a second liquid feeding pipe, wherein a first end of the second liquid feeding pipe is connected to the concentrated solution tank, a second end of the second liquid feeding pipe is connected to the liquid inlet pipe between the first valve and the solution pump, and a fifth valve is installed on the second liquid feeding pipe; a water supply pipe, wherein a first end of the water supply pipe is used to connect to a water source, a second end of the water supply pipe is connected to the liquid inlet pipe between the first valve and the solution pump, and a sixth valve is installed on the water supply pipe; a sewage pipe, the sewage pipe being connected to the sewage outlet of the filter device, and a seventh valve being installed on the sewage pipe; an air supply pipe, the air supply pipe being in communication with the filtering device and having an eighth valve installed thereon; A controller, wherein the input end of the controller is communicatively connected to the output end of the densitometer, and the output end of the controller is communicatively connected to the control end of the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve and the solution pump.

2. The heat source tower heat pump concentration control system according to claim 1, characterized in that: A pipeline filter is installed on the liquid inlet pipe.

3. The heat source tower heat pump concentration control system according to claim 2, characterized in that: Also includes: a pressure differential switch, wherein a first detection end of the pressure differential switch is connected to an input end of the pipeline filter, a second detection end of the pressure differential switch is connected to an output end of the pipeline filter, and an output end of the pressure differential switch is communicatively connected to an input end of the controller; An alarm, wherein the input end of the alarm is communicatively connected to the output end of the controller.

4. The heat source tower heat pump concentration control system according to claim 3, characterized in that: A flow switch is installed on the sewage pipe, and the output end of the flow switch is communicatively connected to the input end of the controller.

5. The heat source tower heat pump concentration control system according to any one of claims 1 to 4, characterized in that: A first one-way valve is installed on the liquid inlet pipe.

6. The heat source tower heat pump concentration control system according to any one of claims 1 to 4, characterized in that: Also includes: A merging pipe, wherein the first end of the merging pipe is connected to the liquid inlet pipe between the first valve and the solution pump, the second end of the merging pipe is respectively connected to the second end of the first liquid delivery pipe, the second end of the second liquid delivery pipe and the second end of the water delivery pipe, and a second one-way valve is installed on the merging pipe.

7. The heat source tower heat pump concentration control system according to any one of claims 1 to 4, characterized in that: The filtering device includes a purification tank, a first mounting plate, a second mounting plate and a filter cartridge; The purification tank is provided with a receiving cavity; The first mounting plate is fixedly connected to the inner wall of the accommodating cavity in a circumferential direction and is penetrated by a first through hole; The circumference of the second mounting plate is fixedly connected to the inner wall of the accommodating cavity and is penetrated by a second through hole; The filter cartridge is provided with a communication cavity along its extension direction, and opposite ends of the filter cartridge in the extension direction are fixedly connected to the first mounting plate and the second mounting plate on opposite sides thereof, respectively, and the first through hole, the communication cavity and the second through hole are connected to each other; The second end of the liquid inlet pipe is in communication with the accommodating cavity on the side of the first mounting plate facing away from the second mounting plate; The first end of the drain pipe is in communication with the accommodating cavity between the first mounting plate and the second mounting plate; The sewage discharge pipe is communicated with the accommodating cavity on the side of the second mounting plate facing away from the first mounting plate.

8. The heat source tower heat pump concentration control system according to claim 7, characterized in that: The filtering device further includes a cleaning assembly, which includes: driving parts; a transmission shaft drivingly connected to the output shaft of the driving member and extending into the filter cartridge; A cleaning brush is connected to the transmission shaft and abuts against the filter cartridge.

9. A heat source tower heat pump concentration control assembly, comprising a heat source tower, a dilute solution tank and a concentrated solution tank, characterized in that: It also includes the heat source tower heat pump concentration control system according to any one of claims 1 to 8.

10. The heat source tower heat pump concentration control assembly according to claim 9, characterized in that: A liquid level meter is provided in the heat source tower for monitoring the liquid level of the antifreeze liquid in the heat source tower. The output end of the liquid level meter is communicatively connected to the input end of the controller of the heat pump concentration control system of the heat source tower.

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