Open type energy tower secondary refrigerant collecting, concentrating and regenerating device

Abstract

The utility model discloses a secondary refrigerant collecting, concentrating and regenerating device for an open-type energy tower, the open-type energy tower is connected with an external heat pump unit through a liquid supply main pipeline, a liquid return main pipeline and a secondary refrigerant circulating pump, and a secondary refrigerant centralized control device comprises a liquid supplementing tank, a densimeter, a temperature sensor and a centralized control device circulating pump; the liquid supply main pipeline is connected with the liquid supplementing tank; the liquid supplementing tank is connected with the first liquid storage tank and the second liquid storage tank; the liquid supplementing tank is connected with a secondary refrigerant circulating pump through a centralized control device circulating pump, the secondary refrigerant circulating pump is respectively connected with a temperature sensor and a densimeter, and the densimeter is respectively connected with an exhaust device and a liquid supply main pipeline; and the liquid supplementing tank is connected with an external tap water inlet and an external liquid collecting container. According to the system, the collection of a diluted solution and the storage and cyclic utilization of a high-concentration solution are realized, the reutilization efficiency of a secondary refrigerant is effectively improved, the system is more stable in operation and high in heat exchange efficiency, the treatment cost is reduced, meanwhile, the environmental pollution is reduced, and the system has remarkable economic and social benefits.

Description

Technical Field

[0001] This utility model relates to an open-type energy tower refrigerant collection, concentration and regeneration device, belonging to the field of air conditioning engineering technology. Background Technology

[0002] Currently, heat pump air conditioning systems that utilize open-type energy towers for heating and cooling buildings have been widely adopted in northern China and the Yangtze River Delta region. Open-type energy tower heat pump systems exchange heat with ambient air through a low-freezing-point refrigerant solution. During periods of continuous rain and high humidity, refrigerant solution dilution occurs in damp and cold winters. This dilution lowers the refrigerant concentration and raises the freezing point, leading to system instability. Salt needs to be added again to maintain the refrigerant concentration and freezing point, increasing processing costs, wasting diluted solution, reducing refrigerant efficiency, resulting in low heat exchange efficiency and environmental pollution. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an open-type energy tower refrigerant collection, concentration and regeneration device.

[0004] The technical solution provided by this utility model is as follows: an open-type energy tower refrigerant collection, concentration and regeneration device, comprising an open-type energy tower, wherein the refrigerant inlet of the open-type energy tower is connected to the refrigerant outlet of an external heat pump unit through a liquid supply main pipeline, and the refrigerant outlet of the open-type energy tower is connected to the refrigerant inlet of an external heat pump unit through a liquid return main pipeline and a refrigerant circulation pump; characterized in that it further comprises a refrigerant central control device, a first liquid storage tank and a second liquid storage tank;

[0005] The refrigerant control unit includes a replenishment tank, a density meter, a temperature sensor, and a control unit circulation pump.

[0006] The main liquid supply line is connected to the replenishment tank via valves; the replenishment tank is connected to the inlet of the first liquid storage tank and the inlet of the second liquid storage tank via valves; the outlets of the first liquid storage tank and the second liquid storage tank are connected to the replenishment tank via a liquid circulation pump and valves; the replenishment tank is connected to the refrigerant circulation pump via the central control device circulation pump; the refrigerant circulation pump is connected to a temperature sensor and a density meter via valves; the density meter is connected to the exhaust device and the main liquid supply line; the replenishment tank is connected to the external tap water inlet and to an external liquid collection container.

[0007] Furthermore, the main supply pipeline is connected to the inlet of the return valve V1. The outlet of the return valve V1 is connected to the inlet of the return electric switch valve AV2 and the inlet of the overflow electric switch valve AV4, respectively. The outlet of the return electric switch valve AV2 is connected to the return port A of the replenishment tank 41. The outlet of the overflow electric switch valve AV4 is connected to the inlet of the main inlet valve V4 of the storage tank. The outlet of the main inlet valve V4 of the storage tank is connected to the inlet of the first storage tank and the inlet of the second storage tank through the first storage tank inlet valve and the second storage tank inlet valve, respectively. The outlets of the first and second storage tanks are connected to the inlet of the storage circulation pump through the first and second storage tank outlet valves, respectively. The outlet of the storage circulation pump is connected to the inlet of the main outlet valve V5 of the storage tank. The outlet of the main outlet valve V5 of the storage tank is connected to the return port B of the replenishment tank. The replenishment port of the replenishment tank is connected to the circulation of the centralized control device through a valve assembly. The pump inlet and the outlet of the circulating pump of the centralized control device are connected to the inlet of the liquid replenishment electric switch valve AV1 through a valve assembly. The outlet of the liquid replenishment electric switch valve AV1 is connected to the inlet of the liquid replenishment port valve V3. The outlet of the liquid replenishment port valve V3 is connected to the inlet of the refrigerant circulating pump. The outlet of the refrigerant circulating pump is connected to the inlet of the densitometer inlet valve V6. The outlet of the densitometer inlet valve V6 is connected to the inlet of the temperature sensor and the densitometer. The outlet of the densitometer is connected to the exhaust device and the inlet of the densitometer outlet valve V7. The outlet of the densitometer outlet valve V7 is connected to the main liquid supply pipeline. The external tap water inlet is connected to the inlet of the water replenishment port valve V2. The outlet of the water replenishment port valve V2 is connected to the inlet of the water replenishment electric switch valve AV3. The outlet of the water replenishment electric switch valve AV3 is connected to the water replenishment port of the liquid replenishment tank. The overflow port of the liquid replenishment tank is connected to the inlet of the overflow port valve V8 of the liquid replenishment tank. The outlet of the overflow port valve V8 of the liquid replenishment tank is connected to the external liquid collection container.

[0008] The beneficial effects of this utility model are as follows: This utility model includes an open energy tower, a first liquid storage tank, a second liquid storage tank, a refrigerant central control device, a liquid storage circulation pump, a refrigerant circulation pump, and various valves, etc.; the refrigerant central control device includes a replenishment tank, a density meter, a temperature sensor, a central control device circulation pump, and an exhaust device; this utility model achieves refrigerant collection, preventing overflow and waste caused by excessively high liquid levels in the tower, while ensuring that the refrigerant is properly collected for subsequent processing. It achieves refrigerant concentration; the concentrated solution has a high concentration and efficiency and can be stored in a high-concentration liquid storage tank for subsequent use or processing. It achieves refrigerant replenishment; fresh refrigerant solution or tap water is added according to actual needs to maintain stable system operation. It achieves solution collection and concentration recovery during seasonal changes; the concentrated solution has a high concentration and stability and can be stored in a liquid storage tank for use in the next heating season. This utility model achieves the collection of diluted solutions and the storage and recycling of high-concentration solutions. This not only avoids the waste of diluted solution due to overflow in existing technologies and improves the efficiency of refrigerant utilization, but also ensures stable system operation and effective refrigerant management through a refrigerant central control device. This makes the system more stable, with high heat exchange efficiency, effectively improves the refrigerant reuse efficiency, reduces processing costs, and minimizes environmental pollution, resulting in significant economic and social benefits. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is a schematic diagram of the refrigerant collection and control device of this utility model.

[0011] The components include: 1. Open energy tower; 2. First liquid storage tank; 3. Second liquid storage tank; 4. Refrigerant central control device; 5. Liquid storage circulation pump; 6. Refrigerant circulation pump; 7. Liquid supply main pipeline; 8. Liquid return main pipeline; 9. Refrigerant inlet; 10. Refrigerant outlet; 41. Make-up tank; 42. Densitometer; 43. Temperature sensor; 44. Central control device circulation pump; 45. Exhaust device; Return port valve V1; Water inlet valve V2; Make-up port valve V3; Main inlet valve of liquid storage tank V4; Main outlet valve of liquid storage tank V5; Densitometer inlet valve V6; Densitometer outlet valve V7; Overflow valve of make-up tank V8; Electric switch valve for make-up liquid AV1; Electric switch valve for return liquid AV2; Electric switch valve for water inlet AV3; Electric switch valve for overflow AV4. Detailed Implementation

[0012] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings:

[0013] like Figure 1 , Figure 2As shown, an open-type energy tower refrigerant collection, concentration and regeneration device includes an open-type energy tower 1, a first liquid storage tank 2, a second liquid storage tank 3, a refrigerant control device 4, a liquid storage circulation pump 5 and a refrigerant circulation pump 6.

[0014] The first storage tank 2 stores low-concentration solutions. When the refrigerant solution in the open energy tower is diluted to the overflow level, it is used to receive excess low-concentration solutions and also serves as a backup source for replenishing the energy tower solution. The second storage tank 3 stores high-concentration solutions. When the refrigerant solution in the energy tower is concentrated through evaporation and its density exceeds the density threshold, it is used to receive high-concentration solutions. The refrigerant control unit 4 is responsible for monitoring the solution status and coordinating the solution exchange between the two storage tanks.

[0015] The refrigerant central control device 4 includes a replenishment tank 41, a densitometer 42, a temperature sensor 43, and a central control device circulation pump 44. The replenishment tank 41 is used to safely store and contain the small amount of overflow refrigerant generated by the energy tower, effectively preventing liquid leakage. The densitometer 42 and the temperature sensor 43 are used to monitor parameters such as solution concentration, liquid level, and temperature in real time. The central control device circulation pump 44 and its associated valve assembly provide the necessary power support for the circulation of refrigerant between the central control device and the energy tower.

[0016] The refrigerant outlet of the external heat pump unit is connected to the refrigerant inlet 9 of the open energy tower 1 via the refrigerant supply main pipeline 7 to the energy tower. The refrigerant outlet 10 of the open energy tower 1 is connected to the inlet of the refrigerant circulation pump 6 via the refrigerant return main pipeline 8 to the heat pump unit. The outlet of the refrigerant circulation pump 6 is connected to the refrigerant inlet of the external heat pump unit. The main supply line 7 is connected to the inlet of the return valve V1. The outlet of the return valve V1 is connected to the inlet of the return electric switch valve AV2 and the inlet of the overflow electric switch valve AV4, respectively. The outlet of the return electric switch valve AV2 is connected to the return port A of the replenishment tank 41. The outlet of the overflow electric switch valve AV4 is connected to the inlet of the main inlet valve V4 of the storage tank. The outlet of the main inlet valve V4 of the storage tank is connected to the inlet of the first storage tank 2 and the inlet of the second storage tank 3 through the inlet valves of the first and second storage tanks, respectively. The outlets of the first and second storage tanks are connected to the inlet of the storage circulation pump 5 through the outlet valves of the first and second storage tanks, respectively. The outlet of the storage circulation pump 5 is connected to the main outlet valve V5 of the storage tank. The outlet of the main outlet valve V5 of the liquid storage tank is connected to the return port B of the replenishment tank 41. The replenishment port of the replenishment tank 41 is connected to the inlet of the circulation pump 44 of the central control device through a valve assembly. The outlet of the circulation pump 44 of the central control device is connected to the inlet of the replenishment electric switch valve AV1 through a valve assembly. The outlet of the replenishment electric switch valve AV1 is connected to the inlet of the replenishment port valve V3. The outlet of the replenishment port valve V3 is connected to the inlet of the refrigerant circulation pump 6. The outlet of the refrigerant circulation pump 6 is connected to the inlet of the densitometer inlet valve V6. The outlet of the densitometer inlet valve V6 is connected to the inlet of the temperature sensor 43 and the densitometer 42, respectively. The outlet of the densitometer 42 is connected to the exhaust device 45 and the inlet of the densitometer outlet valve V7, respectively. The outlet of the densitometer outlet valve V7 is connected to the main supply pipeline 7.

[0017] The external tap water inlet is connected to the inlet of the water supply valve V2, the outlet of the water supply valve V2 is connected to the inlet of the water supply electric switch valve AV3, and the outlet of the water supply electric switch valve AV3 is connected to the water supply port of the liquid supply tank 41; the overflow port of the liquid supply tank 41 is connected to the inlet of the liquid supply tank overflow valve V8, and the outlet of the liquid supply tank overflow valve V8 is connected to the external liquid collection container.

[0018] 1. Storage and replenishment of dilute solutions

[0019] When the refrigerant solution in the outdoor open energy tower 1 is diluted due to high air humidity and reaches the overflow level, if the replenishment tank 41 is not at the high level, the return port valve V1 and the return electric switch valve AV2 will be opened, and the overflow electric switch valve AV4 will be closed. The refrigerant solution from the heat pump unit will overflow into the replenishment tank 41 through the return port valve V1 and the return electric switch valve AV2. If the replenishment tank 41 reaches the high level, the return port valve V1, the overflow electric switch valve AV4, the main inlet valve of the storage tank V4, and the inlet valve of the first storage tank 2 will be opened, and the return electric switch valve AV2 and the inlet valve of the second storage tank will be closed. The low-concentration refrigerant solution in the outdoor open energy tower 1 (i.e., the low-concentration refrigerant solution from the main supply pipeline 7) will overflow into the first storage tank 2 through the return port valve V1, the overflow electric switch valve AV4, the main inlet valve of the storage tank V4, and the inlet valve of the first storage tank 2, and be stored in the first storage tank 2.

[0020] When the outdoor open energy tower 1 needs to be replenished with water due to high evaporation, if the low-concentration refrigerant solution in the first storage tank 2 is sufficient, the replenishment port valve V3, the main outlet valve V5 of the storage tank, and the outlet valve of the first storage tank 2 are opened. The storage tank circulation pump 5, the refrigerant circulation pump 6, and the central control device circulation pump 44 are started. The low-concentration refrigerant solution in the first storage tank 2 flows through the outlet valve of the first storage tank 2, the storage tank circulation pump 5, and the main outlet valve V5 of the storage tank to the replenishment tank 41. Then, powered by the central control device circulation pump 44, it flows through the replenishment electric switch valve AV1 and the replenishment port valve V3 to the return liquid main pipeline 8. It enters the external heat pump unit through the refrigerant circulation pump 6 and is then replenished to the outdoor open energy tower 1 through the supply liquid main pipeline 7. If the low-concentration refrigerant solution in the first storage tank 2 is insufficient, the water inlet valve V2 and the water inlet electric switch valve AV3 are opened, and the refrigerant circulation pump 6 and the central control unit circulation pump 44 are started. Tap water flows through the water inlet valve V2 and the water inlet electric switch valve AV3 to replenish the liquid tank 41. Then, the central control unit circulation pump 44 provides power to flow through the liquid inlet electric switch valve AV1 and the liquid inlet valve V3 to the return liquid main pipeline 8. It enters the external heat pump unit through the refrigerant circulation pump 6, and then is replenished to the outdoor open energy tower 1 through the liquid supply main pipeline 7.

[0021] 2. Storage and recycling of high-concentration solutions

[0022] As the refrigerant solution inside the outdoor open energy tower 1 evaporates, its density gradually increases. When the density exceeds the threshold, the return liquid valve V1, the overflow electric switch valve AV4, the main inlet valve V4 of the storage tank, and the inlet valve of the second storage tank 3 will be opened, while the return liquid electric switch valve AV2 and the inlet valve of the first storage tank 2 will be closed. The high-concentration refrigerant solution inside the outdoor open energy tower 1 (i.e., the high-concentration refrigerant solution from the main supply pipeline 7) flows through the return liquid valve V1, the overflow electric switch valve AV4, the main inlet valve V4 of the storage tank, and the inlet valve of the second storage tank 3 to be discharged into the second storage tank 3 for storage.

[0023] Subsequently, if the low-concentration refrigerant solution in the first storage tank 2 is sufficient, the replenishment port valve V3, the main outlet valve V5 of the storage tank, and the outlet valve of the first storage tank 2 are opened, and the storage tank circulation pump 5, the refrigerant circulation pump 6, and the central control device circulation pump 44 are started. The low-concentration refrigerant solution in the first storage tank 2 flows through the outlet valve of the first storage tank 2, the storage tank circulation pump 5, and the main outlet valve V5 of the storage tank to the replenishment tank 41. Then, powered by the central control device circulation pump 44, it flows through the replenishment electric switch valve AV1 and the replenishment port valve V3 to the return liquid main pipeline 8, enters the external heat pump unit through the refrigerant circulation pump 6, and is then replenished to the outdoor open energy tower 1 through the liquid supply main pipeline 7.

[0024] If the low-concentration refrigerant solution in the first storage tank 2 is insufficient, the water inlet valve V2 and the water inlet electric switch valve AV3 are opened, and the refrigerant circulation pump 6 and the central control unit circulation pump 44 are started. Tap water flows through the water inlet valve V2 and the water inlet electric switch valve AV3 to replenish the liquid tank 41. Then, the central control unit circulation pump 44 provides power to flow through the liquid inlet electric switch valve AV1 and the liquid inlet valve V3 to the return liquid main pipeline 8. It enters the external heat pump unit through the refrigerant circulation pump 6, and then is replenished to the outdoor open energy tower 1 through the liquid supply main pipeline 7.

[0025] 3. Salting operation and solution management

[0026] When the refrigerant solution in the outdoor open energy tower 1 needs to be salted due to dilution, before adding salt, the return liquid valve V1, the replenishment electric switch valve AV4, the main inlet of the storage tank V4, and the inlet valve of the first storage tank 2 will be opened, and the return liquid electric switch valve AV2 and the inlet valve of the second storage tank 3 will be closed. The low-concentration refrigerant solution in the outdoor open energy tower 1 (i.e., the low-concentration refrigerant solution from the main supply pipeline 7) flows through the return liquid valve V1, the replenishment electric switch valve AV4, the main inlet of the storage tank V4, and the inlet valve of the first storage tank 2 into and is stored in the first storage tank 2.

[0027] Subsequently, if there is sufficient high-concentration refrigerant solution in the second storage tank 3, the replenishment port valve V3, the main outlet valve V5 of the storage tank, and the outlet valve of the second storage tank 3 are opened. The storage tank circulation pump 5, the refrigerant circulation pump 6, and the central control device circulation pump 44 are started. The high-concentration refrigerant solution in the second storage tank 3 flows through the outlet valve of the second storage tank, the storage tank circulation pump 5, and the main outlet valve V5 of the storage tank to the replenishment tank 41. Then, powered by the central control device circulation pump 44, it flows through the replenishment electric switch valve AV1 and the replenishment port valve V3 to the return liquid main pipeline 8. It enters the external heat pump unit through the refrigerant circulation pump 6 and is then replenished to the outdoor open energy tower 1 through the liquid supply main pipeline 7.

[0028] If the amount of high-concentration refrigerant solution in the second storage tank 3 is insufficient to directly restore the concentration of refrigerant in the energy tower, then salt should be added manually.

[0029] 4. Shutdown cleaning and solution storage

[0030] Every year when the refrigerant circulation system needs to be shut down for cleaning, the return liquid valve V1, the overflow electric switch valve AV4, the main inlet valve V4 of the storage tank, the inlet valve of the first storage tank 2, and the inlet valve of the second storage tank 3 will be opened, and the return liquid electric switch valve AV2 will be closed. The refrigerant solution in the outdoor open energy tower 1 (i.e., the refrigerant solution from the main supply pipeline 7) will flow through the return liquid valve V1, the overflow electric switch valve AV4, the main inlet valve V4 of the storage tank, and the inlet valve of the first storage tank 2 (or the second storage tank 3), and will flow into and be stored in the first storage tank 2 (or the second storage tank 3).

[0031] When the refrigerant circulation system restarts, the replenishment valve V3, the main outlet valve V5 of the storage tank, the outlet valves of the first storage tank 2 and the second storage tank 3 are opened. The storage tank circulation pump 5, the refrigerant circulation pump 6, and the central control unit circulation pump 44 are started. The refrigerant solution flows through the outlet valve of the first (or second) storage tank, the storage tank circulation pump 5, and the main outlet valve V5 to the replenishment tank 41. Powered by the central control unit circulation pump 44, it flows through the replenishment electric switch valve AV1 and the replenishment valve V3 to the return main pipeline 8. It then enters the external heat pump unit via the refrigerant circulation pump 6, and finally replenishes the outdoor open energy tower 1 via the supply main pipeline 7. This achieves the recycling of the refrigerant. This step avoids refrigerant waste and ensures the stable operation of the system.

[0032] It should be understood that any parts not described in detail in this specification belong to the prior art. The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements to the technical solutions of the present invention made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An open-type energy tower refrigerant collection, concentration, and regeneration device, comprising an open-type energy tower, wherein the refrigerant inlet of the open-type energy tower is connected to the refrigerant outlet of an external heat pump unit via a liquid supply main pipeline, and the refrigerant outlet of the open-type energy tower is connected to the refrigerant inlet of an external heat pump unit via a liquid return main pipeline and a refrigerant circulation pump; characterized in that, It also includes a refrigerant control unit, a first liquid storage tank, and a second liquid storage tank; The refrigerant control unit includes a replenishment tank, a density meter, a temperature sensor, and a control unit circulation pump. The main liquid supply line is connected to the replenishment tank via valves; the replenishment tank is connected to the inlet of the first liquid storage tank and the inlet of the second liquid storage tank via valves; the outlets of the first liquid storage tank and the second liquid storage tank are connected to the replenishment tank via a liquid circulation pump and valves; the replenishment tank is connected to the refrigerant circulation pump via the central control device circulation pump; the refrigerant circulation pump is connected to a temperature sensor and a density meter via valves; the density meter is connected to the exhaust device and the main liquid supply line; the replenishment tank is connected to the external tap water inlet and to an external liquid collection container.

2. The open-type energy tower refrigerant collection, concentration, and regeneration device according to claim 1, characterized in that... The main supply pipeline is connected to the inlet of the return valve V1. The outlet of the return valve V1 is connected to the inlet of the return electric switch valve AV2 and the inlet of the overflow electric switch valve AV4, respectively. The outlet of the return electric switch valve AV2 is connected to the return port A of the replenishment tank. The outlet of the overflow electric switch valve AV4 is connected to the inlet of the main inlet valve V4 of the storage tank. The outlet of the main inlet valve V4 of the storage tank is connected to the inlet of the first and second storage tanks through the first and second storage tank inlet valves, respectively. The outlets of the first and second storage tanks are connected to the inlet of the storage circulation pump through the first and second storage tank outlet valves, respectively. The outlet of the storage circulation pump is connected to the inlet of the main outlet valve V5 of the storage tank. The outlet of the main outlet valve V5 of the storage tank is connected to the return port B of the replenishment tank. The replenishment port of the replenishment tank is connected to the inlet of the circulation pump of the centralized control device through a valve assembly. The outlet of the circulating pump of the centralized control unit is connected to the inlet of the liquid replenishment electric switch valve AV1 through a valve assembly. The outlet of the liquid replenishment electric switch valve AV1 is connected to the inlet of the liquid replenishment port valve V3. The outlet of the liquid replenishment port valve V3 is connected to the inlet of the refrigerant circulating pump. The outlet of the refrigerant circulating pump is connected to the inlet of the densitometer inlet valve V6. The outlet of the densitometer inlet valve V6 is connected to the inlet of the temperature sensor and the densitometer. The outlet of the densitometer is connected to the exhaust device and the inlet of the densitometer outlet valve V7. The outlet of the densitometer outlet valve V7 is connected to the main liquid supply pipeline. The external tap water inlet is connected to the inlet of the water replenishment port valve V2. The outlet of the water replenishment port valve V2 is connected to the inlet of the water replenishment electric switch valve AV3. The outlet of the water replenishment electric switch valve AV3 is connected to the water replenishment port of the liquid replenishment tank. The overflow port of the liquid replenishment tank is connected to the inlet of the overflow port valve V8 of the liquid replenishment tank. The outlet of the overflow port valve V8 of the liquid replenishment tank is connected to the external liquid collection container.

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