Refrigeration system with heat regeneration control function

Abstract

The utility model relates to the technical field of refrigeration systems, and provides a refrigeration system with backheating control, which comprises a liquid supply tank, a first pipeline and a second pipeline are arranged on the liquid supply tank, the other ends of the first pipeline and the second pipeline are communicated, and a parallel unit return air collecting pipe is further arranged on the liquid supply tank. And the second pipeline is positioned in the parallel unit return gas collecting pipe and is used for performing heat exchange on condensed and refluxed liquid and system return liquid so as to control the amount of the refluxed liquid and the gas in the collecting pipe to perform heat exchange. According to the technical scheme, the problem of compressor damage caused by system liquid return in the prior art is solved, and meanwhile the stability and efficiency of the refrigerating system are improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration system technology, specifically to a refrigeration system with heat recovery control. Background Technology

[0002] In refrigeration and freezing systems, liquid return is a common and serious problem that can directly damage the compressor. In parallel units, a return manifold is typically added to balance the return gas pressure of each compressor and allow the liquid return to evaporate within the manifold, thus preventing compressor liquid return. However, this traditional return manifold structure can only handle small amounts of system liquid return; once the amount of system liquid return increases, it becomes difficult to guarantee system stability. Therefore, how to effectively handle system liquid return, protect the compressor, and improve the overall performance and stability of the refrigeration system has become a pressing technical problem that needs to be solved in current refrigeration and freezing systems. Utility Model Content

[0003] This invention proposes a refrigeration system with heat recovery control, which solves the problem of compressor damage caused by liquid return in the existing system, while improving the stability and efficiency of the refrigeration system.

[0004] The technical solution of this utility model is as follows:

[0005] A refrigeration system with heat recovery control includes a liquid supply tank, on which a first pipeline and a second pipeline are provided, the other ends of which are connected. A parallel unit return gas manifold is also provided. The second pipeline is located inside the parallel unit return gas manifold. The second pipeline is used to exchange heat between the condensed return liquid and the system return liquid, so as to control the amount of return liquid and the gas in the manifold for heat exchange.

[0006] As a further technical solution, the parallel unit return gas manifold is equipped with an evaporator and a compressor that connect the inside and outside environment of the parallel unit return gas manifold.

[0007] The evaporator is used to discharge superheated gas from the environment into the return gas manifold of the parallel unit, and the compressor is used to discharge the gas inside the return gas manifold of the parallel unit into the external environment.

[0008] As a further technical solution, ball valves are installed on both sides of the return gas manifold of the parallel unit on the first and second pipelines. The ball valves are used for maintenance or manual control of the flow rate in the pipeline.

[0009] As a further technical solution, a three-way valve is provided between the first pipeline, the second pipeline and the liquid supply tank. The three-way valve is used to regulate the flow rate of the condensed refrigerant liquid that exchanges heat through the first pipeline and the second pipeline.

[0010] As a further technical solution, the second pipeline is arranged in a spiral or coil shape within the return gas manifold of the parallel unit.

[0011] As a further technical solution, a temperature sensor for detecting the temperature of the gas drawn into the compressor is also included.

[0012] As a further technical solution, a pressure sensor for detecting the pressure inside the return gas manifold of the parallel unit is also included.

[0013] The working principle and beneficial effects of this utility model are as follows:

[0014] In this invention, the system includes a liquid supply tank for storing condensed refrigerant liquid. The tank is equipped with a first pipe and a second pipe connected together, with their other ends linked. The first pipe is used for normal refrigerant liquid transport, while the second pipe plays a crucial role in heat recovery control. A return gas manifold for the parallel units is installed in the system to collect return gas from multiple evaporators. The second pipe is cleverly positioned within the return gas manifold of the parallel units. When the refrigerant liquid flows from the liquid supply tank into the second pipe, it exchanges heat with the system return liquid in the return gas manifold. Because the return gas temperature is relatively low, this heat exchange further reduces the temperature of the condensed refrigerant liquid, thereby controlling the amount of condensed liquid after heat exchange and preventing excessive refrigerant liquid from entering the evaporator, which could lead to excessive evaporator load or poor cooling performance. This design not only improves the system's energy efficiency but also enhances the stability and reliability of the refrigeration system, effectively extending the equipment's service life and providing efficient and stable refrigeration assurance for the system. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a first-view axial view structural schematic diagram of the present invention.

[0017] In the diagram: 1. Liquid supply tank, 2. Pressure sensor, 3. First pipeline, 4. Second pipeline, 5. Parallel unit return gas manifold, 6. Evaporator, 7. Compressor, 8. Ball valve, 9. Three-way valve, 10. Temperature sensor. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] Example

[0020] like Figure 1 As shown

[0021] A refrigeration system with heat recovery control includes a liquid supply tank 1, on which a first pipe 3 and a second pipe 4 are provided, the other ends of which are connected. A parallel unit return gas manifold 5 is also provided, and the second pipe 4 is located inside the parallel unit return gas manifold 5. The second pipe 4 is used to exchange heat between the condensed refrigerant liquid and the system return liquid to control the amount of condensed liquid during heat exchange.

[0022] In this embodiment, the system includes a liquid supply tank 1, which stores condensed refrigerant liquid. The liquid supply tank 1 is equipped with a first pipe 3 and a second pipe 4, the other ends of which are connected. The first pipe 3 is used for normal refrigerant liquid transport, while the second pipe 4 plays a crucial role in heat recovery control. The condensed liquid in the second pipe 4 exchanges heat with the refrigerant gas or liquid returning from the evaporator 6. The refrigerant gas or liquid returning from the evaporator 6 completely turns into gas and is drawn away by the compressor 7. The condensed liquid in the second pipe 4 cools down and then flows into the system evaporator 6, where the refrigerant evaporates. The gas then returns to the parallel unit return gas manifold 5. The parallel unit return gas manifold 5 is installed in the system to collect the return gas from multiple evaporators 6. The second pipe 4 is cleverly arranged within the return gas manifold 5 of the parallel unit. When liquid refrigerant flows from the supply tank 1 into the second pipe 4, it exchanges heat with the system return liquid in the return gas manifold 5. Since the return gas temperature is relatively low, this heat exchange further reduces the temperature of the condensed liquid refrigerant, thereby controlling the amount of condensed liquid after heat exchange to a certain extent. This prevents excessive liquid refrigerant from entering the evaporator 6, which could lead to overload or poor cooling performance. This design not only improves the system's energy efficiency but also enhances the stability and reliability of the refrigeration system, effectively extending the equipment's service life and providing efficient and stable refrigeration assurance for the system.

[0023] Furthermore, the parallel unit return gas manifold 5 is equipped with an evaporator 6 and a compressor 7 that connect the interior and exterior environments of the parallel unit return gas manifold 5.

[0024] The evaporator 6 is used to discharge superheated gas from the environment into the return gas manifold 5 of the parallel unit, and the compressor 7 is used to discharge the gas inside the return gas manifold 5 of the parallel unit into the external environment.

[0025] In this embodiment, the system includes a liquid supply tank 1, with a first pipe 3 and a second pipe 4 connected to the liquid supply tank 1, and the ends of the first pipe 3 and the second pipe 4 are connected together. The second pipe 4 is located in the return gas manifold 5 of the parallel unit and is used to exchange heat between the condensed refrigerant liquid and the system return liquid, thereby controlling the amount of condensed liquid after heat exchange.

[0026] The parallel unit's return gas manifold 5 is equipped with an evaporator 6 and a compressor 7. The evaporator 6 discharges superheated gas from the environment into the return gas manifold, while the compressor 7 discharges the gas from the return gas manifold into the external environment. In this system, the evaporator 6 absorbs heat from the environment, converting the refrigerant from a liquid to a gaseous state, after which the gaseous refrigerant enters the return gas manifold. The compressor 7 draws in the low-pressure gas from the return gas manifold and compresses it into a high-temperature, high-pressure gas, then releases the heat to the external environment through the condenser. This design not only improves the system's cooling efficiency but also reduces the superheat of the refrigerant liquid through heat exchange, avoiding the risk of liquid slugging in the compressor 7.

[0027] Furthermore, ball valves 8 are installed on both sides of the return gas manifold 5 of the parallel unit on the first pipeline 3 and the second pipeline 4, for adjusting the flow rate of the condensed refrigerant liquid that undergoes heat exchange through the second pipeline 4.

[0028] In this embodiment, to further optimize flow control, ball valves 8 are installed on both sides of the return gas manifold 5 of the parallel unit on the first pipeline 3 and the second pipeline 4. The ball valves 8 are used for maintenance or manual control of the flow rate within the first pipeline 3 and the second pipeline 4. The design of the ball valves 8 allows for flexible adjustment of the flow rate under different operating conditions, ensuring efficient system operation while avoiding system instability caused by excessive or insufficient flow.

[0029] Specifically, the structure and materials of Ball Valve 8 give it a high cost-performance ratio and long service life. Its valve body is made of brass, while the ball and stem are made of stainless steel, ensuring durability and corrosion resistance. Furthermore, the flow characteristic curve and maximum permissible differential pressure of Ball Valve 8 are precisely designed to effectively prevent cavitation, thereby reducing noise and wear.

[0030] Furthermore, a three-way valve 9 is provided between the first pipeline 3, the second pipeline 4 and the liquid supply tank 1. The three-way valve 9 is used to regulate the flow rate of the condensed refrigerant liquid that exchanges heat through the first pipeline 3 and the second pipeline 4.

[0031] In this embodiment, to further optimize flow regulation, a three-way valve 9 is installed between the first pipeline 3, the second pipeline 4, and the liquid supply tank 1. This three-way valve 9 adopts a flow-diverting design, enabling flexible adjustment of the flow rate of the condensed refrigerant liquid undergoing heat exchange through the first pipeline 3 and the second pipeline 4 according to system requirements. The structural design of the three-way valve 9 provides high regulation accuracy and stable operating performance, effectively preventing system instability caused by flow fluctuations.

[0032] Furthermore, the second pipeline 4 is arranged in a spiral or coil shape within the return gas manifold 5 of the parallel unit.

[0033] Furthermore, it also includes a temperature sensor 10 for detecting the temperature of the gas drawn into the compressor 7.

[0034] Furthermore, it also includes a pressure sensor 2 for detecting the pressure inside the return gas manifold 5 of the parallel unit.

[0035] In this embodiment, the system is also equipped with a temperature sensor 10 and a pressure sensor 2. The temperature sensor 10 is installed on the suction line of the compressor 7 to detect the temperature of the suction gas in real time, ensuring that the compressor 7 operates within a safe temperature range. The pressure sensor 2 is installed in the return gas manifold 5 of the parallel unit to monitor the pressure in the manifold and prevent system failure due to excessively high or low pressure. The second pipe 4 is arranged in a spiral or coil shape in the return gas manifold 5 of the parallel unit. This design increases the heat exchange area between the condensed refrigerant liquid and the return gas, thereby controlling the temperature of the condensate liquid more efficiently.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A refrigeration system with heat recovery control, characterized in that, It includes a liquid supply tank (1), on which a first pipeline (3) and a second pipeline (4) are provided. The other ends of the first pipeline (3) and the second pipeline (4) are connected. It also includes a parallel unit return gas manifold (5). The second pipeline (4) is located inside the parallel unit return gas manifold (5). The second pipeline (4) is used to allow the condensed return liquid and the system return liquid to exchange heat, so as to control the amount of return liquid and the gas in the manifold (5) to exchange heat.

2. A refrigeration system with heat recovery control according to claim 1, characterized in that, The parallel unit return gas manifold (5) is equipped with an evaporator (6) and a compressor (7) that connect the inside and outside environment of the parallel unit return gas manifold (5); The evaporator (6) is used to discharge superheated gas in the environment into the return gas manifold (5) of the parallel unit, and the compressor (7) is used to discharge the gas inside the return gas manifold (5) of the parallel unit into the external environment.

3. A refrigeration system with heat recovery control according to claim 1, characterized in that, Ball valves (8) are installed on both sides of the return gas manifold (5) of the parallel unit on the first pipeline (3) and the second pipeline (4). The ball valves (8) are used for maintenance or manual control of the flow rate in the pipeline.

4. A refrigeration system with heat recovery control according to claim 1, characterized in that, A three-way valve (9) is provided between the first pipeline (3), the second pipeline (4) and the liquid supply tank (1). The three-way valve (9) is used to regulate the flow rate of the condensed refrigerant liquid that exchanges heat through the first pipeline (3) and the second pipeline (4).

5. A refrigeration system with heat recovery control according to claim 1, characterized in that, The second pipeline (4) is arranged in a spiral or coil shape in the return gas manifold (5) of the parallel unit.

6. A refrigeration system with heat recovery control according to claim 2, characterized in that, It also includes a temperature sensor (10) for detecting the temperature of the gas drawn into the compressor (7).

7. A refrigeration system with heat recovery control according to claim 1, characterized in that, It also includes a pressure sensor (2) for detecting the pressure inside the return gas manifold (5) of the parallel unit.

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