Solution concentration adjusting and filtering control device for heat pump of heat source tower

Abstract

The invention provides a heat source tower heat pump solution concentration adjusting and filtering control device. Comprising an electric control cabinet for controlling the whole device, a solution inflow pipeline, a first valve, a first pressure control bypass assembly, a purification assembly, a second valve, a third valve, a density meter, a solution outflow pipeline, a sewage discharge pipeline, a second pressure control bypass assembly, a dilute solution outflow pipeline, a solution concentration device and a concentrated solution inflow pipeline, one side of the solution inflow pipeline is connected with a pressure pipeline of an external heat source tower, a first branch on the other side of the solution inflow pipeline is connected into the solution outflow pipeline, a first valve, a first pressure control bypass assembly and a purification assembly are sequentially arranged between the solution inflow pipeline and the solution outflow pipeline, and a sewage outlet of the purification assembly is connected with a sewage discharge pipeline. According to the invention, the problems of complex design, high construction difficulty, large occupied area, high operation difficulty, difficult maintenance and the like of a solution purification and control regulation system of a heat source tower heat pump system in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat source tower, in particular to a heat source tower heat pump solution concentration adjusting and filtering control device. BACKGROUND

[0002] In the hot summer and cold winter area of China, the heat source tower heat pump system has been widely used in winter heating. When the system is running, the solution cleanliness and concentration need to be controlled in real time. In the aspect of solution concentration adjustment, the existing technology mostly uses evaporation method to purify the dilute solution, such as arranging artificial special adjustment of density. However, this manual operation not only requires high professional requirements for personnel, but also has great randomness, cannot quickly respond to the change of solution concentration, and often leads to unstable operation of the whole system.

[0003] The maintenance of solution cleanliness depends on the purification device. At present, the purification process is to deliver the circulating solution to the purification device to filter impurities. However, after the purification device runs for a period of time, the filtering components are easy to attach a large amount of impurities or even be blocked, and need to be cleaned. The existing cleaning method is to fill the purification device with circulating solution, after cleaning, the falling impurities are mixed into the solution, and then the solution containing impurities is directly discharged. However, the circulating solution is mostly anti-freezing agent with high cost, so such operation not only causes waste of anti-freezing agent, increases cost, but also pollutes the environment.

[0004] In addition, the control process also involves solution recovery, charging, heat source tower liquid level adjustment and other processes. The existing technology designs independent pipeline systems for different processes, and each pipeline, water pump and purification device is transported to the site for assembly. This dispersed design and on-site installation mode makes the whole system design extremely complex, and it is extremely difficult to coordinate many components during construction; the placement of a large number of pipelines and equipment greatly increases the occupied area; it is difficult to operate due to the need to be familiar with multiple independent systems; and it is very difficult to troubleshoot and repair due to the dispersion of the system. SUMMARY

[0005] Based on the above problems, the present application provides a heat source tower heat pump solution concentration adjusting and filtering control device, which solves the problems of complex design, great construction difficulty, large occupied area, high operation difficulty and difficult maintenance of the solution purification and control adjusting system of the heat source tower heat pump system in the prior art. The heat source tower heat pump solution concentration adjusting and filtering control device can automatically detect the solution concentration, automatically adjust the solution concentration, automatically purify, reduce the involvement of artificial, reduce the design difficulty and construction difficulty, reduce the occupied area, have perfect control function, are easy to operate and convenient to maintain.

[0006] The present application provides a heat source tower heat pump solution concentration adjusting and filtering control device, which includes:

[0007] an electric control cabinet for controlling the whole device, a solution inflow pipe, a first valve, a first pressure control bypass assembly, a purification assembly, a second valve, a third valve, a densimeter, a solution outflow pipe, a sewage discharge pipe, a second pressure control bypass assembly, a dilute solution outflow pipe, a solution concentration device, and a concentrated solution inflow pipe;

[0008] One side of the solution inflow pipe is connected to a pressure pipe of an external heat source tower, and a first branch on the other side of the solution inflow pipe is connected to the solution outflow pipe, and a first valve, a first pressure control bypass assembly, and a purification assembly are sequentially arranged between the two;

[0009] The solution outflow pipe is connected to a pipe of an external heat source tower, and a second valve is connected in series and a densimeter is connected in parallel between the two;

[0010] A second branch on the other side of the solution inflow pipe is connected to the third valve and then connected to the dilute solution outflow pipe, the dilute solution outflow pipe is provided with a second pressure control bypass assembly, two ends of the solution concentration device are respectively connected to the dilute solution outflow pipe and the concentrated solution inflow pipe, and the concentrated solution inflow pipe is connected to the solution outflow pipe.

[0011] In addition, the device further comprises a dilute solution tank, a dilute solution supply pipe, a concentrated solution tank, a concentrated solution supply pipe, a tap water pipe, a fourth valve, a fifth valve, a sixth valve, and an eighth valve;

[0012] The second branch on the other side of the solution inflow pipe is also connected to the dilute solution tank after being connected to the third valve, and the eighth valve is arranged between the third valve and the dilute solution tank, two ends of the dilute solution supply pipe are respectively connected to the output end of the first valve and the output end of the third valve of the solution inflow pipe, and the fifth valve is arranged on the dilute solution supply pipe;

[0013] The concentrated solution supply pipe connects the concentrated solution tank and the dilute solution supply pipe, the fourth valve is arranged on the concentrated solution supply pipe, the tap water pipe connects external tap water and the dilute solution supply pipe, and the sixth valve is arranged on the tap water pipe.

[0014] In addition, the seventh valve and the ninth valve are arranged on the sewage discharge pipe, the flow meter is arranged on the solution inflow pipe, and the corrosion rate sensor is further arranged on the solution outflow pipe;

[0015] The first pressure control bypass assembly comprises two branches, and a solution recovery pump is arranged on one branch;

[0016] The second pressure control bypass assembly comprises two branches, and a dilute solution pump is arranged on one branch.

[0017] In addition, if the solution concentration and the tower liquid level meet the running state, the device enters the solution purification mode, the electrical control cabinet controls the fourth valve to the ninth valve to be closed, and the first valve and the second valve to be opened,

[0018] At this time, the solution flows out along the solution inflow pipeline via the first valve, the first pressure control bypass assembly, the purification assembly, the second valve, the densimeter, the corrosion rate sensor, and the solution outflow pipeline;

[0019] When the flow value on the solution inflow pipeline is less than the set value, the solution recovery pump is started.

[0020] In addition, when the solution concentration is lower than the preset concentration or the tower liquid level is higher than the preset tower high liquid level, the device enters the dilute solution collection mode: the electrical control cabinet controls the second valve, the fourth valve to the seventh valve, and the ninth valve to be closed, and controls the first valve, the third valve, and the eighth valve to be opened.

[0021] At this time, the solution flows into the dilute solution tank along the solution inflow pipeline via the first valve, the first pressure control bypass assembly, the purification assembly, the third valve, and the eighth valve, and whether to start the solution recovery pump is determined according to the flow value in the solution inflow pipeline.

[0022] In addition, when the solution concentration meets the normal running and the tower liquid level is lower than the preset tower low liquid level, the device enters the dilute solution charging mode: the electrical control cabinet controls the first valve, the third valve, the fourth valve, the sixth valve, the seventh valve, and the ninth valve to be closed, controls the second valve, the fifth valve, and the eighth valve to be opened, and starts the solution recovery pump.

[0023] At this time, the solution flows out from the dilute solution tank via the eighth valve, the fifth valve, the first pressure control bypass assembly, the purification assembly, the second valve along the solution outflow pipeline to the heat source tower.

[0024] In addition, when the solution concentration meets the normal running, the tower liquid level is lower than the preset tower low liquid level, and the liquid level of the dilute solution tank is lower than the low alarm value, the device enters the tap water charging mode: the electrical control cabinet controls the first valve, the third valve, the fourth valve, the fifth valve, the seventh valve, and the ninth valve to be closed, controls the second valve and the sixth valve to be opened, and the eighth valve is automatically opened and closed according to the start and stop of the dilute solution pump.

[0025] At this time, the solution flows out along the tap water pipeline via the sixth valve, the first pressure control bypass assembly, the purification assembly, the second valve along the solution outflow pipeline to the heat source tower.

[0026] In addition, when the solution concentration is lower than the preset concentration and the tower liquid level is lower than the preset low tower liquid level, the device enters the concentrated solution charging mode: the electrical control cabinet controls the first valve, the third valve, the fifth valve, the sixth valve, the seventh valve and the ninth valve to be closed, controls the second valve and the fourth valve to be opened, starts the solution recovery pump, and the eighth valve is automatically opened and closed according to the start and stop of the dilute solution pump;

[0027] At this time, the solution flows out from the concentrated solution tank along the concentrated solution supply pipeline, passes through the fourth valve, the first pressure control bypass assembly, the purification assembly, the second valve, and flows out to the heat source tower along the solution outflow pipeline.

[0028] In addition, if it is monitored that the purification assembly needs to be cleaned, the device enters the cleaning and sewage discharge mode: the electrical control cabinet controls the solution recovery pump to be closed, controls the first valve, the third valve, the fourth valve, the fifth valve, the seventh valve and the ninth valve to be closed, controls the second valve and the sixth valve to be opened, delays for a first preset time period, closes the second valve, opens the seventh valve and the ninth valve, delays for a first preset time period, closes the sixth valve, delays for a first preset time period, closes the seventh valve and the ninth valve, opens the first valve, the second valve, the fifth valve and the eighth valve, starts the solution recovery pump, delays for a second preset time period, closes the fifth valve, opens the first valve, the second valve, closes the ninth valve and the seventh valve, and the eighth valve is automatically opened and closed according to the start and stop of the dilute solution pump;

[0029] First, the remaining solution in the purification assembly is flushed into the solution outflow pipeline with tap water, and then the sewage is discharged through the sewage discharge pipeline after the purification assembly is cleaned.

[0030] In addition, after the heat source tower winter heating mode ends, the device enters the solution recovery mode: the electrical control cabinet controls the solution recovery pump to stop, closes the second valve, the fourth to seventh valves and the ninth valve, opens the first valve, the third valve and the eighth valve, and then starts the solution recovery pump to recover the solution to the dilute solution tank;

[0031] Before the winter heating mode starts, the device enters the seasonal charging mode: the electrical control cabinet controls the solution recovery pump to stop, closes the first valve, the third valve, the sixth valve, the seventh valve and the ninth valve, opens the second valve, the fifth valve and the eighth valve, and then starts the solution recovery pump to charge the solution in the dilute solution tank into the heat source tower through the solution outflow pipeline.

[0032] The heat source tower heat pump solution concentration adjusting and filtering control device provided by the present application can automatically detect solution concentration, automatically adjust solution concentration, automatically purify, reduces manual participation, and reduces design difficulty and construction difficulty, reduces land occupation area, has perfect control function, is simple to operate, and is convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The structural principle diagram of the heat source tower heat pump solution concentration adjusting and filtering control device provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in combination with specific embodiments and drawings. The specific embodiments are only intended to illustrate the present application in detail, and do not impose any limitation on the present application, and the protection scope of the present application is subject to the claims.

[0035] REFERENCE Figure 1 The present application provides a heat source tower heat pump solution concentration adjusting and filtering control device, which comprises:

[0036] an electrical control cabinet for controlling the whole device, a solution inflow pipeline P1, a first valve V1, a first pressure control bypass assembly A, a purification assembly B, a second valve V2, a third valve V3, a densimeter 11, a solution outflow pipeline P2, a sewage discharge pipeline P3, a second pressure control bypass assembly C, a dilute solution outflow pipeline P4, a solution concentration device, and a concentrated solution inflow pipeline P5.

[0037] One side of the solution inflow pipeline P1 is connected with a pressure pipeline of an external heat source tower, a first branch on the other side of the solution inflow pipeline P1 is connected with the solution outflow pipeline P2, and a first valve V1, a first pressure control bypass assembly A, and a purification assembly B are sequentially arranged between the two pipelines, and a sewage discharge port of the purification assembly is connected with the sewage discharge pipeline P3.

[0038] The solution outflow pipeline P2 is connected with a pipeline of an external heat source tower, and a second valve V2 is connected in series and the densimeter 11 is connected in parallel between the two pipelines.

[0039] A second branch on the other side of the solution inflow pipeline P1 is connected with the third valve V3 and then connected with the dilute solution outflow pipeline P4, the second pressure control bypass assembly C is arranged on the dilute solution outflow pipeline P4, both ends of the solution concentration device are connected with the dilute solution outflow pipeline P4 and the concentrated solution inflow pipeline P5 respectively, and the concentrated solution inflow pipeline P5 is connected with the solution outflow pipeline P2.

[0040] Optionally, the densimeter 11 is installed in the vertical pipe section, and the densimeter pressure head installation distance is greater than 0.5 meters, and the flow rate of the measured pipeline is less than 1 m / s.

[0041] The electrical control cabinet is electrically connected with all electrical elements in the device to control and monitor the water pump, motor, valve, instrument and other equipment.

[0042] The solution concentration device is used to concentrate the dilute solution flowing into the pipeline P4, and after being concentrated into a concentrated solution, the concentrated solution is output to the solution outflow pipeline P2 via the concentrated solution inflow pipeline P5, and then enters the heat source tower.

[0043] Optionally, all the valves are electric valves, which control the opening and closing of the pipelines.

[0044] The first pressure control bypass assembly A has two branches, and one branch of the first pressure control bypass assembly A is connected in series with a manual butterfly valve 10 and a check valve 12, and the other branch is connected in series with a manual butterfly valve 10, a pipeline filter 9, a solution recovery pump 1, a check valve 12, and a manual butterfly valve 10, and a differential pressure switch 8 is connected in parallel with the pipeline filter 9. When the solution pressure in the pipeline is insufficient, the solution flows into the branch with the solution recovery pump 1, and the solution is provided with pressure by the solution recovery pump 1, and when the pressure is sufficient, the solution flows into the other branch.

[0045] The control principle of the second pressure control bypass assembly C is the same as that of the first pressure control bypass assembly A. One branch of the second pressure control bypass assembly C is connected in series with a manual butterfly valve 10 and a check valve 12, and the other branch is connected in series with a manual butterfly valve 10, a pipeline filter 9, a dilute solution pump 2, a check valve 12, and a manual butterfly valve 10. When the solution pressure in the pipeline is insufficient, the solution flows into the branch with the dilute solution pump 2, and the solution is provided with pressure by the dilute solution pump 2, and when the pressure is sufficient, the solution flows into the other branch.

[0046] The purification assembly B is used for purifying the solution, and the purified wastewater is discharged through the wastewater discharge pipeline P3, and the purification assembly B is provided with a cleaning motor 3, a purification tank 4, a manual butterfly valve 10, and a differential pressure transmitter 16. The wastewater discharge pipeline P3 is provided with a manual butterfly valve 10 and a pressure transmitter 14.

[0047] The heat source tower heat pump solution concentration adjustment and filtration control device is used for purifying the solution, and the solution flows along the solution inflow pipeline P1, passes through a first valve V1, a first pressure control bypass assembly A, a purification assembly B, a second valve V2, a densimeter 11, and an inflow solution outflow pipeline P2, and finally enters an external heat source tower.

[0048] When the solution is concentrated, the solution enters the solution concentration device through the first valve V1, the first pressure control bypass assembly A, the purification assembly B, the third valve V3, the second pressure control bypass assembly C, and the dilute solution outflow pipe P4. After the solution is concentrated by the solution concentration device, the concentrated solution is input into the solution outflow pipe P2 through the concentrated solution inflow pipe P5, and finally enters the external heat source tower.

[0049] The heat source tower heat pump solution concentration adjusting and filtering control device can automatically detect the solution concentration, automatically adjust the solution concentration, automatically purify, reduce the manual participation, and reduce the design difficulty and construction difficulty, reduce the land occupation area, improve the control function, simplify the operation, and facilitate the maintenance.

[0050] In one of the embodiments, the device further comprises a dilute solution tank D, a dilute solution supplement pipe P6, a concentrated solution tank E, a concentrated solution supplement pipe P7, a tap water pipe P8, a fourth valve V4, a fifth valve V5, a sixth valve V6, and an eighth valve V8.

[0051] The second branch of the solution inflow pipe P1 on the other side is connected to the third valve V3 and also communicates with the dilute solution tank D, and the eighth valve V8 is installed between the third valve V3 and the dilute solution tank D. The dilute solution supplement pipe P6 has two ends connected to the output ends of the first valve V1 and the third valve V3 of the solution inflow pipe P1, and the fifth valve V5 is installed on the dilute solution supplement pipe P6.

[0052] The concentrated solution supplement pipe P7 communicates the concentrated solution tank E and the dilute solution supplement pipe P6, and the fourth valve V4 is arranged on the concentrated solution supplement pipe P7. The tap water pipe P8 connects the external tap water and the dilute solution supplement pipe P6, and the sixth valve V6 is arranged on the tap water pipe P8.

[0053] The dilute solution tank D is used to recycle excess dilute solution, and can also be used to supplement the dilute solution when the dilute solution in the pipe is insufficient. The concentrated solution tank E is used to store concentrated solution, and the concentrated solution is obtained from the concentrated solution tank E when the concentrated solution is needed for blending in the pipe. The tap water pipe P8 is used to provide tap water, and is usually used for cleaning the purification assembly.

[0054] Optionally, the control mode of the heat source tower heat pump solution concentration adjusting and filtering control device includes a system shutdown mode, a solution purification mode, a dilute solution collection mode, a dilute solution charging mode, a tap water charging mode, a concentrated solution charging mode, a cleaning and pollution discharge mode, a seasonal recovery mode, and a seasonal charging mode. By opening and closing the valves, the switching of various modes is realized.

[0055] By setting the dilute solution tank D, dilute solution supplement pipeline P6, concentrated solution tank E, concentrated solution supplement pipeline P7, tap water pipeline P8, the device increases many functions and can automatically and flexibly adjust.

[0056] In one of the embodiments, the seventh valve V7 and the ninth valve V9 are arranged on the sewage discharge pipeline P3, the flow meter 7 is arranged on the solution inflow pipeline P1, and the corrosion rate sensor 15 is further arranged on the solution outflow pipeline P2;

[0057] The first pressure control bypass assembly A includes two branches, and the solution recovery pump 1 is arranged on one branch.

[0058] The second pressure control bypass assembly C includes two branches, and the dilute solution pump 2 is arranged on one branch.

[0059] The seventh valve V7 and the ninth valve V9 are used to control the on-off of the sewage discharge pipeline P3, and optionally, the pressure transmitter 14 is installed between the two valves, which is used to convert the pressure signal into a standard electrical signal and has the functions of measuring the pressure and converting the pressure into an electrical signal for transmission. The flow meter 7 is used to monitor the flow on the solution inflow pipeline P1, and when the flow is small, the solution recovery pump 1 needs to be started. The corrosion rate sensor 15 is used to monitor the corrosion condition of the metal material.

[0060] By arranging the solution recovery pump 1 and the dilute solution pump 2, when the pressure in the pipeline is insufficient, the solution can flow smoothly.

[0061] In one of the embodiments, if the solution concentration and the tower liquid level meet the running state, the device enters the solution purification mode, the electrical control cabinet controls the fourth valve V4 to the ninth valve V9 to be closed, and the first valve V1 and the second valve V2 are opened,

[0062] At this time, the solution flows along the solution inflow pipeline P1, passes through the first valve V1, the first pressure control bypass assembly A, the purification assembly B, the second valve V2, the density meter 11, the corrosion rate sensor 15 and the solution outflow pipeline P2;

[0063] When the flow value on the solution inflow pipeline P1 is less than the set value, the solution recovery pump 1 is started.

[0064] If the solution concentration and the column liquid level meet the running state, the column liquid level is between the preset high column liquid level and the preset low column liquid level, and it is considered that the running state is met. At this time, the fourth valve V4 to the ninth valve V9 are closed, the first valve V1 and the second valve V2 are opened, and the third valve V3 is automatically opened and closed according to the start and stop of the solution concentration device. When the signals that the fourth valve V4 to the ninth valve V9 are closed to the position and the first valve V1 and the second valve V2 are opened to the position are detected, the solution recovery pump 1 is started and stopped according to the flow control. When the flow is less than the set value (for example, 15 m3 / h), the solution recovery pump 1 is started, and the device works in the solution purification mode.

[0065] The solution purification mode opens the first valve V1 and the second valve V2, closes the fourth valve V4 to the ninth valve V9, and makes the solution flow from the solution inflow pipe P1 to the first valve V1, the first pressure control bypass assembly A, the purification assembly B, the second valve V2, the densimeter 11, the corrosion rate sensor 15, and the solution outflow pipe P2, so as to achieve the purpose of purification.

[0066] In one embodiment, when the solution concentration is lower than the preset concentration or the column liquid level is higher than the preset high column liquid level, the device enters the dilute solution collection mode: the electrical control cabinet controls the second valve V2, the fourth valve V4 to the seventh valve V7, and the ninth valve V9 to be closed, and controls the first valve V1, the third valve V3, and the eighth valve V8 to be opened.

[0067] At this time, the solution flows along the solution inflow pipe P1 to the first valve V1, the first pressure control bypass assembly A, the purification assembly B, the third valve V3, and the eighth valve V8, and flows into the dilute solution tank D. Whether the solution recovery pump 1 is started is determined according to the flow value in the solution inflow pipe P1.

[0068] The preset concentration is set according to experiments and experience, and the preset high column liquid level and the preset low column liquid level are also set according to experiments and experience.

[0069] When the device is in the running state, when the solution concentration is lower than the preset concentration or the column liquid level is higher than the preset high column liquid level, the device enters the dilute solution collection mode. Optionally, the valves are electric valves, and in the dilute solution collection mode: the second valve V2, the fourth valve V4 to the seventh valve V7, and the ninth valve V9 are closed, and the first valve V1, the third valve V3, and the eighth valve V8 are opened. When the signals that the second valve V2, the fourth valve V4 to the seventh valve V7, and the ninth valve V9 are closed to the position and the first valve V1, the third valve V3, and the eighth valve V8 are opened to the position are detected, the solution recovery pump 1 is started and stopped according to the flow control. When the flow is less than the set value, the solution recovery pump 1 is started, and the device works in the dilute solution collection mode.

[0070] By providing the dilute solution collection mode, the excessive dilute solution in the column body can be collected without waste.

[0071] In one embodiment, when the solution concentration meets the normal operation and the tower liquid level is lower than the preset low tower liquid level, the device enters the dilute solution charging mode: the electrical control cabinet controls the first valve V1, the third valve V3, the fourth valve V4, the sixth valve V6, the seventh valve V7 and the ninth valve V9 to be closed, controls the second valve V2 and the fifth valve V5 to be opened, and starts the solution recovery pump 1.

[0072] At this time, the solution flows out from the dilute solution tank D to the heat source tower along the solution outflow pipeline P2 via the eighth valve V8, the fifth valve V5, the first pressure control bypass assembly A, the purification assembly B and the second valve V2.

[0073] When the device is in the running state, the solution concentration meets the operation requirement, and the tower liquid level is lower than the preset low tower liquid level, the device enters the dilute solution charging mode. Optionally, the valve is an electric valve, and in the dilute solution charging mode: the V1, V3, V4, V6-V7, V9 electric valves are closed, the V2, V5, V8 electric valves are opened, when it is detected that the V1, V3, V4, V6-V7, V9 electric valves are closed to the position and the V2, V5, V8 electric valves are opened to the position, the solution recovery pump 1 is started, and after the solution recovery pump 1 is operated, the device works in the dilute solution charging mode.

[0074] The dilute solution charging mode controls the solution to flow out from the dilute solution tank and be supplemented to the heat source tower system.

[0075] In one embodiment, when the solution concentration meets the normal operation, the tower liquid level is lower than the preset low tower liquid level, and the liquid level of the dilute solution tank is lower than the low alarm value, the device enters the tap water charging mode: the electrical control cabinet controls the first valve V1, the third valve V3, the fourth valve V4, the fifth valve V5, the seventh valve V7 and the ninth valve V9 to be closed, controls the second valve V2 and the sixth valve V6 to be opened, and the eighth valve V8 is automatically opened and closed according to the start and stop of the dilute solution pump 2.

[0076] At this time, the solution flows out along the tap water pipeline P8 via the sixth valve V6, the first pressure control bypass assembly A, the purification assembly B and the second valve V2 along the solution outflow pipeline P2 to the heat source tower.

[0077] When the device is in the running state, the solution concentration meets the operation requirement, the tower liquid level is lower than the preset low tower liquid level, and the liquid level of the dilute solution tank is lower than the low alarm value, the device enters the tap water charging mode. Optionally, the valve is an electric valve, and in the tap water charging mode, the V1, V3, V4, V5, V7, V9 electric valves are closed, the V2, V6 electric valves are opened, when it is detected that the V1, V3, V4, V5, V7, V9 electric valves are closed to the position and the V2, V6 electric valves are opened to the position, the device works in the tap water charging mode, and the V8 electric valve is automatically opened and closed according to the start and stop of the dilute solution pump 2.

[0078] The purpose of closing V1, V3, V4, V5, V7, V9 electric valves and opening V2, V6 electric valves is to control the flow of tap water from the tap water pipeline P8 to supplement the heat source tower system.

[0079] In one of the embodiments, when the solution concentration is lower than the preset concentration and the tower liquid level is lower than the preset low tower liquid level, the device enters the concentrated solution charging mode: the electrical control cabinet controls the first valve V1, the third valve V3, the fifth valve V5, the sixth valve V6, the seventh valve V7 and the ninth valve V9 to be closed, controls the second valve V2 and the fourth valve V4 to be opened, starts the solution recovery pump 1, and the eighth valve V8 is automatically opened and closed according to the start and stop of the dilute solution pump 2.

[0080] At this time, the solution flows out of the concentrated solution tank E along the concentrated solution supply pipeline P7, passes through the fourth valve V4, the first pressure control bypass assembly A, the purification assembly B, the second valve V2, and flows out along the solution outflow pipeline P2 to the heat source tower.

[0081] When the device is in operation, if the solution concentration is lower than the preset concentration and the tower liquid level is lower than the preset low tower liquid level, the device enters the concentrated solution charging mode. Optionally, the valves are electric valves. In the concentrated solution charging mode, V1, V3, V5-V7, V9 electric valves are closed, and V2, V4 electric valves are opened. When it is detected that V1, V3, V5-V7, V9 electric valves are closed to the position and V2, V4 electric valves are opened to the position, the solution recovery pump 1 is started. After the solution recovery pump 1 is running, the device works in the concentrated solution charging mode. The eighth valve V8 is automatically opened and closed according to the start and stop of the dilute solution pump 2.

[0082] The purpose of closing V1, V3, V5-V7, V9 electric valves and opening V2, V4 electric valves is to control the flow of tap water from the tap water pipeline P8 to supplement the heat source tower system.

[0083] In one of the embodiments, if it is monitored that the purification assembly needs to be cleaned, the device enters the cleaning and pollution discharge mode: the electrical control cabinet controls the solution recovery pump 1 to be closed, controls the first valve V1, the third valve V3, the fourth valve V4, the fifth valve V5, the seventh valve V7 and the ninth valve V9 to be closed, controls the second valve V2 and the sixth valve V6 to be opened, delays for a first preset time period, closes the second valve V2, opens the seventh valve V7 and the ninth valve V9, delays for a first preset time period, closes the sixth valve V6, delays for a first preset time period, closes the seventh valve V7 and the ninth valve V9, opens the first valve V1, the second valve V2, the fifth valve V5 and the eighth valve V8, starts the solution recovery pump 1, delays for a second preset time period, closes the fifth valve V5, opens the first valve V1 and the second valve V2, closes the ninth valve V9 and the seventh valve V7, and the eighth valve V8 is automatically opened and closed according to the start and stop of the dilute solution pump 2.

[0084] First, the remaining solution in the purification assembly B is flushed into the solution outflow pipe P2 with tap water, and then the sewage is discharged through the sewage discharge pipe P3 after the purification assembly B is cleaned.

[0085] When the device is in the running state, the cleaning tank in the purification assembly B is in the cleaning time state, the device enters the cleaning and sewage discharge mode, and the valve is an electric valve. In the cleaning and sewage discharge mode, the solution recovery pump 1 is stopped, the cleaning and sewage discharge is started, the V1, V3, V4, V5, V7, V9 electric valves are closed, the V2, V6 electric valves are opened, when the V1, V3, V4, V5, V7, V9 electric valves are closed to the position and the V2, V6 electric valves are opened to the position, a delay of 30s is performed, the V2 electric valve is closed, the V2 electric valve is closed to the position, the V7, V9 electric valves are opened, a delay of 30s is performed, the V6 electric valve is closed, after the V6 electric valve is closed to the position, a delay of 30s is performed, the V7 or V9 electric valve is closed, the V7 or V9 electric valve is closed to the position, the V1, V2, V5, V8 electric valves are opened, the V1, V2, V5, V8 electric valves are opened to the position, the solution recovery pump is started, a delay of 10s is performed after the solution recovery pump is started, the V5 electric valve is closed, the V5 electric valve is closed to the position, the V1, V2 electric valves are opened, the V9 or V7 electric valve is closed, the V7 and V9 electric valves are closed to the position, the cleaning and sewage discharge mode ends after the V7 and V9 electric valves are closed to the position, and the cleaning and sewage discharge mode is exited. The V8 electric valve is automatically opened and closed according to the start and stop of the dilute solution pump 2.

[0086] The purpose of closing the V1, V3, V4, V5, V7, V9 electric valves and opening the V2, V6 electric valves is to open the tap water to dilute the remaining solution in the cleaning tank and flush the system.

[0087] The purpose of closing the V2 electric valve after a delay of 30s is to flush the solution in the tank into the system for 30s.

[0088] The purpose of opening the V7, V9 electric valves is to open the sewage discharge port (or sewage discharge port) of the purification assembly B.

[0089] The purpose of closing the V6 electric valve after a delay of 30s is to give the tank a certain time for sewage discharge.

[0090] The purpose of closing the V7 or V9 electric valve after a delay of 30s is to close the sewage discharge port after the sewage discharge is completed.

[0091] The purpose of opening the V1, V2, V5, V8 electric valves after the V7 or V9 electric valve is closed to the position is to open the system pipeline and start other working modes, and at the same time, the solution in the tap water pipeline is diluted to prevent freezing.

[0092] In one of the embodiments, when the heat source tower heating mode ends in winter, the device enters the solution recovery mode: the electrical control cabinet controls the solution recovery pump 1 to stop, closes the second valve V2, the fourth to seventh valves V4-V7 and the ninth valve V9, opens the first valve V1, the third valve V3 and the eighth valve V8, and then starts the solution recovery pump 1 to recover the solution to the dilute solution tank D.

[0093] Before the winter heating mode starts, the device enters the seasonal charging mode: the electrical control cabinet controls the solution recovery pump 1 to stop, closes the first valve V1, the third valve V3, the sixth valve V6, the seventh valve V7 and the ninth valve V9, opens the second valve V2, the fifth valve V5 and the eighth valve V8, and then starts the solution recovery pump 1 to charge the solution in the dilute solution tank D into the heat source tower via the solution outflow pipe P2.

[0094] After the winter heating mode ends, the solution needs to be recovered to the dilute solution tank D, the control mode is switched to the solution recovery mode, and optionally, after manually confirming the start of recovery, the device starts to recover the solution. Optionally, the valves are electric valves, after entering the solution recovery mode, the solution recovery pump 1 is stopped, the V2, V4-V7 and V9 electric valves are closed, and the V1, V3 and V8 electric valves are opened. When it is detected that the V2, V4-V7 and V9 electric valves are closed to the position and the V1, V3 and V8 electric valves are opened to the position, the solution recovery pump 1 starts and stops according to the flow control. When the flow is less than the set value, the solution recovery pump 1 starts to recover the solution. When it is detected that the liquid level of the dilute solution tank D does not rise for 5 minutes, it is judged that the solution recovery is complete, the solution recovery pump 1 is stopped, and the V1, V3 and V8 electric valves are closed. When it is detected that the V1, V3 and V8 electric valves are closed to the position, the solution recovery is complete, and the solution recovery mode is exited.

[0095] This process is to open the recovery pipeline, recover the system solution into the dilute solution tank, and after the liquid level in the dilute solution tank no longer rises, the recovery is complete, all pipeline valves are closed, and the recovery process is ended.

[0096] Before the winter heating mode starts, the solution needs to be charged into the system, the control mode is switched to the seasonal charging mode, and optionally, after manually confirming the start of charging, the device starts to charge the solution. After entering the solution charging mode, the solution recovery pump 1 is stopped, the V1, V3, V4, V6, V7 and V9 electric valves are closed, and the V2, V5 and V8 electric valves are opened. When it is detected that the V1, V3, V4, V6, V7 and V9 electric valves are closed to the position and the V5 and V2 electric valves are opened to the position, the solution recovery pump 1 is started to start the solution charging. When it is detected that the tower liquid level is higher than the preset low tower liquid level, it is judged that the solution charging is complete, the solution recovery pump 1 is stopped, and the V2, V5 and V8 electric valves are closed. When it is detected that the V2, V5 and V8 electric valves are closed to the position, the solution charging is complete, and the seasonal charging mode is exited.

[0097] The process is to open the filling pipeline, fill the solution in the dilute solution tank into the system pipeline, and stop the solution recovery pump 1 when the liquid level in the direct tower reaches the preset low liquid level, close all valves, and the filling process is completed.

[0098] Through the solution recovery mode and the seasonal filling mode, the device can switch the service mode in time during the seasonal change, save and reuse the solution, and save the solution.

[0099] The device also includes an entering system shutdown mode: when the device needs to be shut down, stop the solution recovery pump 1, stop the cleaning motor 3; close the first to ninth valves V1-V9; when the solution recovery pump 1 is detected to be shut down and the V1-V9 valve is closed to the signal, the device is shut down. The operation of the dilute solution pump 2 is interlocked with the solution concentration device, and the dilute solution pump 2 is shut down when the solution concentration device is shut down. Each pipeline interface is marked as 6, and the valve is marked as 5. Optionally, a temperature transmitter marked as 13 is provided on the tap water pipeline P8, and the temperature transmitter is an instrument for converting temperature variables into transmissible standardized output signals.

[0100] The above only describes the principles and preferred embodiments of the present application. It should be noted that, for those skilled in the art, on the basis of the principles of the present application, several other variations can also be made, which should be considered as the protection scope of the present application.

Claims

1. A heat source tower heat pump solution concentration adjustment and filter control device, characterized by, It comprises: an electrical control cabinet for controlling the whole device, a solution inflow pipe, a first valve, a first pressure control bypass assembly, a purification assembly, a second valve, a third valve, a densimeter, a solution outflow pipe, a sewage discharge pipe, a second pressure control bypass assembly, a dilute solution outflow pipe, a solution concentration device and a concentrated solution inflow pipe; one side of the solution inflow pipe is connected with a pressure pipe of an external heat source tower, a first branch on the other side of the solution inflow pipe is connected with the solution outflow pipe, and a first valve, a first pressure control bypass assembly and a purification assembly are sequentially arranged between the two pipes, and a sewage discharge pipe is connected with a sewage discharge port of the purification assembly; the solution outflow pipe is connected with a pipe of an external heat source tower, and a second valve is connected in series and a densimeter is connected in parallel between the two pipes; a second branch on the other side of the solution inflow pipe is connected with the third valve and then connected with the dilute solution outflow pipe, a second pressure control bypass assembly is arranged on the dilute solution outflow pipe, two ends of the solution concentration device are respectively connected with the dilute solution outflow pipe and the concentrated solution inflow pipe, and the concentrated solution inflow pipe is connected with the solution outflow pipe.

2. The heat source tower heat pump solution concentration adjusting and filtering control device according to claim 1, wherein the device further comprises a dilute solution tank, a dilute solution supply pipe, a concentrated solution tank, a concentrated solution supply pipe, a tap water pipe, a fourth valve, a fifth valve, a sixth valve and an eighth valve; the second branch on the other side of the solution inflow pipe is also connected with the dilute solution tank after being connected with the third valve, an eighth valve is arranged between the third valve and the dilute solution tank, two ends of the dilute solution supply pipe are respectively connected with an output end of the first valve and an output end of the third valve of the solution inflow pipe, and a fifth valve is arranged on the dilute solution supply pipe; the concentrated solution supply pipe is connected with the concentrated solution tank and the dilute solution supply pipe, a fourth valve is arranged on the concentrated solution supply pipe, a tap water pipe is connected with external tap water and the dilute solution supply pipe, and a sixth valve is arranged on the tap water pipe.

3. The heat source tower heat pump solution concentration adjusting and filtering control device according to claim 2, wherein a seventh valve and a ninth valve are arranged on the sewage discharge pipe, a flow meter is arranged on the solution inflow pipe, and a corrosion rate sensor is further arranged on the solution outflow pipe; the first pressure control bypass assembly comprises two branches, and a solution recovery pump is arranged on one branch; the second pressure control bypass assembly comprises two branches, and a dilute solution pump is arranged on one branch.

4. The heat source tower heat pump solution concentration adjusting and filtering control device according to claim 3, wherein if the solution concentration and the tower liquid level meet the operating state, the device enters a solution purification mode, the electrical control cabinet controls the fourth valve to the ninth valve to be closed, and the first valve and the second valve to be opened, at this time, the solution flows out along the solution inflow pipe, the first valve, the first pressure control bypass assembly, the purification assembly, the second valve, the densimeter, the corrosion rate sensor and the solution outflow pipe; when the flow value on the solution inflow pipe is less than a set value, the solution recovery pump is started.

5. The heat source tower heat pump solution concentration adjusting and filtering control device according to claim 3, wherein When the solution concentration is lower than the preset concentration or the tower liquid level is higher than the preset tower high liquid level, the device enters the dilute solution charging mode: the electrical control cabinet controls the second valve, the fourth valve to the seventh valve, the ninth valve to be closed, and controls the first valve, the third valve, the eighth valve to be opened; At this time, the solution flows into the dilute solution tank along the solution inflow pipeline through the first valve, the first pressure control bypass assembly, the purification assembly, the third valve and the eighth valve, and whether to start the solution recovery pump is determined according to the flow value in the solution inflow pipeline.

6. The heat source tower heat pump solution concentration adjustment and filtration control device according to claim 3, characterized in that, When the solution concentration meets the normal operation and the tower liquid level is lower than the preset tower low liquid level, the device enters the dilute solution charging mode: the electrical control cabinet controls the first valve, the third valve, the fourth valve, the sixth valve, the seventh valve and the ninth valve to be closed, and controls the second valve, the fifth valve and the eighth valve to be opened, and starts the solution recovery pump; At this time, the solution flows out of the dilute solution tank along the solution outflow pipeline through the eighth valve, the fifth valve, the first pressure control bypass assembly, the purification assembly, the second valve.

7. The heat source tower heat pump solution concentration adjustment and filtration control device according to claim 3, characterized in that, When the solution concentration meets the normal operation, the tower liquid level is lower than the preset tower low liquid level, and the liquid level of the dilute solution tank is lower than the low alarm value, the device enters the tap water charging mode: the electrical control cabinet controls the first valve, the third valve, the fourth valve, the fifth valve, the seventh valve and the ninth valve to be closed, and controls the second valve, the sixth valve to be opened, and the eighth valve to be automatically opened and closed according to the start and stop of the dilute solution pump; At this time, the solution flows out of the dilute solution tank along the solution outflow pipeline through the sixth valve, the first pressure control bypass assembly, the purification assembly, the second valve.

8. The heat source tower heat pump solution concentration adjustment and filtration control device according to claim 3, characterized in that, When the solution concentration is lower than the preset concentration and the tower liquid level is lower than the preset tower low liquid level, the device enters the concentrated solution charging mode: the electrical control cabinet controls the first valve, the third valve, the fifth valve, the sixth valve, the seventh valve and the ninth valve to be closed, and controls the second valve and the fourth valve to be opened, and starts the solution recovery pump, and the eighth valve is automatically opened and closed according to the start and stop of the dilute solution pump; At this time, the solution flows out of the concentrated solution tank along the concentrated solution supply pipeline through the fourth valve, the first pressure control bypass assembly, the purification assembly, the second valve along the solution outflow pipeline to the heat source tower.

9. The heat source tower heat pump solution concentration adjustment and filtration control device according to claim 3, characterized in that, If the purification assembly needs to be cleaned, the device enters the cleaning and pollution discharging mode: the electrical control cabinet controls the solution recovery pump to be closed, controls the first valve, the third valve, the fourth valve, the fifth valve, the seventh valve and the ninth valve to be closed, controls the second valve and the sixth valve to be opened, delays for a first preset time period, then closes the second valve, opens the seventh valve and the ninth valve, delays for a first preset time period, then closes the sixth valve, delays for a first preset time period, then closes the seventh valve and the ninth valve, opens the first valve, the second valve, the fifth valve and the eighth valve, starts the solution recovery pump, delays for a second preset time period, closes the fifth valve, opens the first valve and the second valve, closes the ninth valve and the seventh valve, and the eighth valve is automatically opened and closed according to the start and stop of the dilute solution pump; The remaining solution in the purification assembly is first flushed into the solution outflow pipeline by tap water, and then the sewage is discharged through the sewage discharge pipeline after the purification assembly is cleaned.

10. The heat source tower heat pump solution concentration adjustment and filtering control device according to any one of claims 3-9, characterized in that, When the heat source tower winter heating mode ends, the device enters the solution recovery mode: the electrical control cabinet controls the solution recovery pump to stop, closes the second valve, the fourth to seventh valves and the ninth valve, opens the first valve, the third valve and the eighth valve, and then starts the solution recovery pump to recover the solution to the dilute solution tank; Before the winter heating mode starts, the device enters the season changing and charging mode: the electrical control cabinet controls the solution recovery pump to stop, closes the first valve, the third valve, the sixth valve, the seventh valve and the ninth valve, opens the second valve, the fifth valve and the eighth valve, and then starts the solution recovery pump to charge the solution in the dilute solution tank into the heat source tower through the solution outflow pipeline.

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