A cooling water refrigeration system

Abstract

This utility model provides a cooling water refrigeration system, including an electric actuator and a plate heat exchanger. The electric actuator is mounted on a first high-pressure water supply pipe reinforced with fabric and rubber. One end of the first high-pressure water supply pipe serves as an inlet connected to an external tap water source, and the other end is connected to the inlet of the plate heat exchanger. The outlet of the plate heat exchanger is connected to a drain pipe, forming a tap water cooling circuit. A first flow switch and a first temperature sensor are installed at the outlet of the plate heat exchanger to detect the water flow rate and temperature at the outlet. Tap water enters the plate heat exchanger through the electric actuator for heat exchange. The flow switch monitors the minimum flow rate; if the flow rate is too low, the entire unit stops. Then, the temperature sensor detects the outlet water temperature and controls the opening of the electric actuator, achieving water conservation. By sensing the tap water temperature through the temperature sensor and determining the tap water flow rate, the electric actuator controls the tap water flow rate, improving utilization efficiency and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a cooling water refrigeration system. Background Technology

[0002] A cooling water refrigeration system is a system that uses water as a cooling medium to dissipate heat through circulating water. Existing cooling water refrigeration systems use tap water as the cooling water source for their heat dissipation components. This has the following advantages: (1) no additional equipment is required; it can be directly connected to the municipal water supply network, making it convenient to obtain; (2) it eliminates the need for investment in cooling towers or water treatment systems, resulting in low initial costs. However, long-term use of tap water as the cooling water source is expensive, especially in areas with scarce water resources; and the direct discharge after cooling leads to low water resource utilization, which does not meet the requirements of water conservation and may be prohibited in some areas.

[0003] In view of this, it is necessary to improve the heat dissipation module of the existing water-cooled air conditioner in order to solve the aforementioned water-saving problem. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a cooling water refrigeration system.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a cooling water refrigeration system, including a base plate, an electric actuator, and a plate heat exchanger. The plate heat exchanger is disposed on one side of the base plate. The electric actuator is disposed on a first fabric-reinforced rubber high-pressure water supply pipe. The end of the first fabric-reinforced rubber high-pressure water supply pipe near the electric actuator serves as an inlet, connected to an external tap water source. The electric actuator controls the flow rate of the tap water. The other end of the first fabric-reinforced rubber high-pressure water supply pipe is connected to the inlet of the plate heat exchanger. A first ball valve is installed between the pressure tube and the inlet of the first plate heat exchanger. The outlet of the first plate heat exchanger is connected to a drain pipe to form a tap water cooling circuit. A first flow switch is installed between the outlet of the first plate heat exchanger and the drain pipe. A first temperature sensor is installed on the drain pipe near the first flow switch. The first temperature sensor is used to detect the water temperature at the outlet of the first plate heat exchanger and feeds the detection result back to the electric actuator to control and adjust the opening of the electric actuator, thereby controlling the flow rate of tap water so that the tap water flow is just used for heat exchange, achieving the effect of water saving. The first flow switch can monitor the minimum tap water flow rate and play a protective role. The principle is that when the tap water flow rate is too small and insufficient for heat exchange, the whole machine will shut down for protection.

[0006] Furthermore, it also includes a water tank, a water pump, and a second plate heat exchanger. The second plate heat exchanger is located on one side of the base plate and is arranged side by side with the first plate heat exchanger. The water tank contains circulating water and has an inlet and an outlet. A second temperature sensor is located near the outlet of the water tank to detect the temperature of the circulating water. The outlet of the water tank is connected to the inlet of the water pump via a third high-pressure water supply pipe reinforced with fabric rubber. The outlet of the water pump is connected to the inlet of the water pump via a second high-pressure water supply pipe reinforced with fabric rubber. The water inlet is connected to the upper end of the second plate heat exchanger, and the water outlet at the lower end of the second plate heat exchanger is connected to the water inlet of the water tank through the fourth cloth-reinforced rubber high-pressure water supply pipe, forming a water tank circulating water cooling loop; a second ball valve is provided between the second cloth-reinforced rubber high-pressure water supply pipe and the water inlet of the second plate heat exchanger, and the second ball valve is used to control the flow rate of cooling water entering the second plate heat exchanger; a second flow switch is provided between the fourth cloth-reinforced rubber high-pressure water supply pipe and the water outlet of the second plate heat exchanger, and is used to control the flow rate of water flowing out of the second plate heat exchanger.

[0007] Furthermore, it also includes a water pump bracket and a water pump power supply. The water pump is mounted on top of the water pump bracket and fixed to the base plate by the water pump bracket. The water pump power supply is located on the rear side of the water pump bracket and is electrically connected to the water pump to provide working power for the water pump.

[0008] Furthermore, it also includes a coil assembly, which is immersed in the circulating water in the water tank to form a coil cooling circuit.

[0009] Furthermore, the coil assembly includes a first coil, a second coil, a third coil, and a fourth coil, each coil being independent of the others and immersed in the circulating water within the water tank.

[0010] Furthermore, it also includes a compressor, a compressor return gas manifold, and a liquid receiver. The compressor, compressor return gas manifold, and liquid receiver are all mounted on the base plate and fixed relative to the base plate. The compressor is used to compress the refrigerant into a high-temperature, high-pressure gas. The gas outlet at the top of the compressor is connected to the upper inlet of the plate heat exchanger through the compressor outlet pipe. The gas outlet at the bottom of the plate heat exchanger is connected to the inlet of the liquid receiver through the plate heat exchanger outlet pipe. The outlet of the liquid receiver is connected to the lower inlet of the plate heat exchanger through the fifth rubber-reinforced high-pressure water pipe and the plate heat exchanger inlet pipe. A drying filter and an electronic expansion valve are also installed on the pipeline between the fifth rubber-reinforced high-pressure water pipe and the plate heat exchanger inlet pipe. The gas outlet at the top of the plate heat exchanger is connected to the upper inlet of the compressor return gas manifold through the compressor inlet pipe. The gas outlet at the bottom of the compressor return gas manifold is connected to the lower inlet of the compressor through a pipeline. The gas flows back into the compressor to form a refrigerant circulation loop.

[0011] Furthermore, it also includes an electrical control box, used to control the operation of the entire machine.

[0012] The entire working process of the equipment is as follows: tap water is used to cool the high-temperature and high-pressure compressed gas in plate heat exchanger one; the cooled compressed gas then cools the circulating water in the water tank in plate heat exchanger two; finally, the circulating water in the water tank is used to cool the liquid in the coil.

[0013] The beneficial effects of this utility model are:

[0014] (1) Tap water saving system: Tap water enters the plate heat exchanger for heat exchange through an electric actuator. The minimum flow rate of tap water is monitored by a flow switch. If the flow rate is too low, the whole machine will stop. Then, the temperature probe detects the outlet water temperature and controls the opening of the electric actuator, so that the tap water flow rate is just used for heat exchange, thus achieving the effect of saving water.

[0015] (2) The water temperature of the tap water is sensed by the temperature probe, the water flow rate of the tap water is determined, and the tap water flow rate is controlled by the electric actuator to improve the utilization rate and reduce the cost. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the cooling water refrigeration system of this utility model.

[0018] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0019] Figure 3 This is a structural schematic diagram of the cooling water refrigeration system of this utility model (with the water tank cover hidden).

[0020] Figure 4 This is a structural schematic diagram of the cooling water refrigeration system of this utility model (with the water tank cover hidden).

[0021] Figure 5 This is a schematic diagram of the cooling water refrigeration system of this utility model (excluding water tank and coil).

[0022] In the diagram: 1-Second temperature sensor, 2-Electric actuator, 3-First ball valve, 4-First fabric-reinforced rubber high-pressure water supply pipe, 5-First flow switch, 6-First temperature sensor, 7-Compressor, 8-Second fabric-reinforced rubber high-pressure water supply pipe, 9-Third fabric-reinforced rubber high-pressure water supply pipe, 10-Water pump, 11-Plate heat exchanger II, 12-Inlet pipe of plate heat exchanger II, 13-Electronic expansion valve, 14-Dryer filter, 15-Plate heat exchanger I, 16-Second flow switch 17-Switch, 18-Second ball valve, 19-Liquid receiver, 20-Compressor outlet pipe, 21-Plate heat exchanger outlet pipe, 22-Compressor inlet pipe, 23-Fourth fabric-reinforced rubber high-pressure water pipe, 24-Water tank, 25-Second coil, 26-Third coil, 27-Fourth coil, 28-Fifth fabric-reinforced rubber high-pressure water pipe, 29-Compressor return air manifold, 30-Water pump bracket, 31-Water pump power supply, 32-Electrical control box, 33-Base plate. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] like Figures 1-5As shown, a cooling water refrigeration system of this utility model includes a water tank 23, a coil assembly, an electric actuator 2, a base plate 33, and a compressor 7, a compressor return air manifold 29, a plate heat exchanger 15, a plate heat exchanger 11, a liquid receiver 18, and a water pump 10 mounted on the base plate 33. The electric actuator 2 and the plate heat exchanger 15 form a tap water cooling circuit for cooling the refrigerant with tap water. The water tank 23, the water pump 10, and the plate heat exchanger 11 form a circulating water cooling circuit for the water tank 23, where the circulating water in the water tank 23 is cooled in the first stage using refrigerant. The coil assembly serves as a coil cooling circuit for cooling the circulating water in the second stage.

[0027] In the cooling circuit of the refrigerant by tap water, the electric actuator 2 is installed on the first fabric-reinforced rubber high-pressure water pipe 4. The end of the first fabric-reinforced rubber high-pressure water pipe 4 near the electric actuator 2 serves as the water inlet and is connected to an external tap water source. The electric actuator 2 is used to control the flow rate of the tap water. The other end of the first fabric-reinforced rubber high-pressure water pipe 4 is connected to the water inlet of the plate heat exchanger 15. A first ball valve 3 is provided between the first fabric-reinforced rubber high-pressure water pipe 4 and the water inlet of the plate heat exchanger 15. The first ball valve 3 is a manual valve, which is manually opened when the machine is turned on and manually closed when it is turned off, so as to realize the connection and disconnection between the first fabric-reinforced rubber high-pressure water pipe 4 and the water inlet of the plate heat exchanger 15. The outlet of the plate heat exchanger 15 is connected to a drain pipe to discharge tap water, forming a tap water cooling circuit. The discharged tap water can be directly discharged into a water tank or other recycling system for other uses. A first flow switch 5 is installed between the outlet of the plate heat exchanger 15 and the drain pipe. The first flow switch 5 detects the flow rate at the outlet of the plate heat exchanger 15. When the flow rate is too low and insufficient for heat exchange, to prevent overheating, the first flow switch 5 feeds back the flow information to the electrical control box 32, controlling the entire unit to shut down. A first temperature sensor 6 is installed on the drain pipe near the first flow switch 5. The first temperature sensor 6 detects the water temperature at the outlet of the plate heat exchanger 15 and feeds back the detection result to the electric actuator 2 to control and adjust the opening of the electric actuator 2, thereby controlling the flow rate of tap water to ensure that the tap water flow is just sufficient for heat exchange, achieving water conservation. The first flow switch 5 can monitor the minimum tap water flow rate; if the flow rate is too low, the entire unit will shut down. In this embodiment, in order to install the first temperature sensor 6, a T-connector is added to the drain pipe, and the first temperature sensor 6 is connected to the two-way interface above the T-connector.

[0028] In the first-stage cooling circuit of the circulating water in the water tank 23, the water tank 23 contains circulating water and has an inlet and an outlet. In this embodiment, the inlet and outlet of the water tank 23 are respectively located at both ends of the water tank 23, with the inlet positioned higher than the outlet. A second temperature sensor 1 is located near the outlet of the water tank 23 to detect the temperature of the circulating water. The outlet of the water tank 23 is connected to the inlet of the water pump 10 via a third high-pressure water pipe 9 reinforced with fabric and rubber. The outlet of the water pump 10 is connected to the inlet at the upper end of the plate heat exchanger 11 via a second high-pressure water pipe 8 reinforced with fabric and rubber. The outlet at the lower end of the plate heat exchanger 11 is connected to the inlet at the lower end of the plate heat exchanger 11 via a fourth high-pressure water pipe reinforced with fabric and rubber. The pressure pipe 22 is connected to the inlet of the water tank 23 to form a circulating water cooling circuit in the water tank 23; a second ball valve 17 is provided between the second cloth-reinforced rubber high-pressure water pipe 8 and the inlet of the second plate heat exchanger 11, and the second ball valve 17 is used to control the flow rate of cooling water entering the second plate heat exchanger 11; a second flow switch 16 is provided between the fourth cloth-reinforced rubber high-pressure water pipe 22 and the outlet of the second plate heat exchanger 11, and is used to control the flow rate of water flowing out of the second plate heat exchanger 11; it also includes a water pump bracket 30 and a water pump power supply 31. The water pump 10 is set above the water pump bracket 30 and fixed to the base plate 33 by the water pump bracket 30. The water pump power supply 31 is set on the rear side of the water pump bracket 30 and is electrically connected to the water pump 10 to provide working power to the water pump 10.

[0029] In the second stage of cooling and temperature reduction of the circulating water in the water tank 23 by the coil, the coil assembly is immersed in the circulating water in the water tank 23 to form a coil cooling circuit; the coil assembly includes a first coil 24, a second coil 25, a third coil 26 and a fourth coil 27, each coil is independent of each other and is immersed in the circulating water in the water tank.

[0030] In the refrigerant circulation loop, the outlet at the top of the compressor 7 is connected to the inlet at the top of the plate heat exchanger 15 via the compressor outlet pipe 19. The outlet at the bottom of the plate heat exchanger 15 is connected to the inlet of the liquid receiver 18 via the plate heat exchanger outlet pipe 20. The outlet of the liquid receiver 18 is connected to the inlet at the bottom of the plate heat exchanger 11 via the fifth rubber-reinforced water high-pressure pipe 28 and the plate heat exchanger inlet pipe 12. A dryer filter 14 and an electronic expansion valve 13 are also provided on the pipeline between the fifth rubber-reinforced water high-pressure pipe 28 and the plate heat exchanger inlet pipe 12. The dryer filter 14 dries and filters the gas, and the electronic expansion valve 13 throttles the flow. The outlet at the top of the plate heat exchanger 11 is connected to the inlet at the top of the compressor return air manifold 29 via the compressor inlet pipe 21. The outlet at the bottom of the compressor return air manifold 29 is connected to the inlet at the bottom of the compressor 7 via a pipeline. The gas flows back into the compressor 7 to form a refrigerant circulation loop.

[0031] Furthermore, it also includes an electrical control box 32, used to control the operation of the entire machine. Valves, switches, sensors, and other electrical control components are all connected to the electrical control box via wiring to receive or send back electrical signals.

[0032] The working principle consists of three stages as follows:

[0033] The first stage is the refrigerant cooling stage: the refrigerant in the copper pipes is compressed into a high-temperature, high-pressure gas by the compressor 7, and enters the plate heat exchanger 15 through the compressor outlet pipe 19 for heat exchange. Electric actuator 2 introduces tap water, which enters the plate heat exchanger 15 through the first rubber-reinforced high-pressure water pipe 4 and the first ball valve 3, carrying away the heat from the refrigerant (i.e., the gas compressed by compressor 7) in the copper pipes of the plate heat exchanger 15. Then, the tap water flows out through the first flow switch 5 and the first temperature sensor 6. The first temperature sensor 6 can detect the outlet water temperature to control the opening of the electric actuator 2, ensuring that the tap water flow is just right for heat exchange, achieving water conservation. The first flow switch 5 can monitor the minimum tap water flow; if the flow is too low, the entire unit will shut down.

[0034] The second stage is the cooling stage of the circulating water in water tank 23: The refrigerant temperature decreases as it passes through plate heat exchanger 15, passes through dryer filter 14 to filter solid and liquid impurities, and after being throttled by electronic expansion valve 13, the temperature and pressure decrease. It then enters plate heat exchanger 11 through inlet pipe 12. At the same time, the circulating water in water tank 23 is pumped by water pump 10 from the third high-pressure water supply pipe 9 with cloth-reinforced rubber to the pump 10, and then enters plate heat exchanger 11 through the second high-pressure water supply pipe 8 with cloth-reinforced rubber. The circulating water then circulates back to water tank 23 through the second flow switch 16 and the fourth high-pressure water supply pipe 22 with cloth-reinforced rubber. During this process, the low-temperature, low-pressure refrigerant in the copper pipes of plate heat exchanger 11 carries away the heat from the circulating water in water tank 23, lowering the temperature of the water in water tank 23.

[0035] The third stage is the coil water cooling stage: the first coil 24, the second coil 25, the third coil 26, and the fourth coil 27 are immersed in the circulating water in the water tank 23. The circulating water has already undergone the second stage of cooling and is at a lower temperature, which can remove the heat from the liquid in the coils, thereby achieving the effect of water cooling of the liquid in the coils and achieving the purpose of cooling. After the liquid in the coils is cooled, it can be used as a cold source to provide refrigeration.

[0036] The cooling water refrigeration system of this utility model can be used, for example, as a refrigeration system for milk tea machines to quickly cool down the tea soup. It is suitable for occasions that require rapid cooling, including but not limited to the above-mentioned applications.

[0037] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A chilled water refrigeration system characterized by: The system includes a base plate, an electric actuator, and a plate heat exchanger. The plate heat exchanger is located on one side of the base plate. The electric actuator is mounted on a first high-pressure water supply pipe reinforced with fabric and rubber. One end of the first high-pressure water supply pipe near the electric actuator serves as an inlet, connected to an external tap water source. The other end of the first high-pressure water supply pipe is connected to the inlet of the plate heat exchanger. A first ball valve is installed between the first high-pressure water supply pipe and the inlet of the plate heat exchanger. The outlet of the plate heat exchanger is connected to a drain pipe, forming a tap water cooling circuit. A first flow switch is installed between the outlet of the plate heat exchanger and the drain pipe. A first temperature sensor is installed on the drain pipe near the first flow switch. The first temperature sensor is used to detect the water temperature at the outlet of the plate heat exchanger.

2. The chilled water refrigeration system of claim 1, wherein: It also includes a water tank, a water pump, and a second plate heat exchanger, wherein the second plate heat exchanger is disposed on one side of the base plate and arranged side by side with the first plate heat exchanger. The water tank contains circulating water and has an inlet and an outlet. A second temperature sensor is located near the outlet of the water tank to detect the temperature of the circulating water. The outlet of the water tank is connected to the inlet of the water pump via a third high-pressure water supply pipe with a fabric-reinforced rubber core. The outlet of the water pump is connected to the inlet of the upper end of the second plate heat exchanger via a second high-pressure water supply pipe with a fabric-reinforced rubber core. The outlet of the lower end of the second plate heat exchanger is connected to the inlet of the water tank via a fourth high-pressure water supply pipe with a fabric-reinforced rubber core, forming a cooling loop for the circulating water in the water tank. A second ball valve is installed between the second high-pressure water supply pipe with a fabric-reinforced rubber core and the inlet of the second plate heat exchanger, and a second flow switch is installed between the fourth high-pressure water supply pipe with a fabric-reinforced rubber core and the outlet of the second plate heat exchanger.

3. The chilled water chiller system of claim 2, wherein: It also includes a water pump bracket and a water pump power supply. The water pump is mounted on top of the water pump bracket and fixed to the base plate by the water pump bracket. The water pump power supply is located on the rear side of the water pump bracket and is connected to the power supply to provide working power to the water pump.

4. The chilled water chiller system of claim 2, wherein: It also includes a coil assembly, which is immersed in the circulating water in the water tank to form a coil cooling circuit.

5. The chilled water chiller system of claim 4, wherein: The coil assembly includes a first coil, a second coil, a third coil, and a fourth coil, each coil being independent of the others and submerged in the circulating water within the water tank.

6. The cooling water refrigeration system as described in claim 4, characterized in that: It also includes a compressor, a compressor return air manifold, and a liquid receiver, all of which are mounted on and fixed relative to the base plate. The compressor is used to compress the refrigerant into a high-temperature, high-pressure gas. The outlet at the top of the compressor is connected to the inlet at the top of the plate heat exchanger through the compressor outlet pipe. The outlet at the bottom of the plate heat exchanger is connected to the inlet of the liquid receiver through the outlet pipe of the plate heat exchanger. The outlet of the liquid receiver is connected to the inlet at the bottom of the plate heat exchanger through the fifth rubber-reinforced high-pressure water pipe and the inlet pipe of the second plate heat exchanger. A drying filter and an electronic expansion valve are also installed on the pipeline between the fifth rubber-reinforced high-pressure water pipe and the inlet pipe of the second plate heat exchanger. The outlet at the top of the plate heat exchanger is connected to the inlet at the top of the compressor return gas chamber through the compressor inlet pipe. The outlet at the bottom of the compressor return gas chamber is connected to the inlet at the bottom of the compressor through a pipeline. The gas flows back into the compressor to form a refrigerant circulation loop.

7. The chilled water chiller system of claim 1, wherein: It also includes an electrical control box, which is used to control the operation of the entire machine.

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