Water chiller unit for preventing overcooling

Abstract

The utility model discloses a water chilling unit is used for preventing excessive cooling device relates to refrigeration equipment field, including cooling tower, the cooling tower is by fan, tower body, heat exchange board, control valve is formed, the fan is fixedly connected with the fan through motor output of tower body, the tower body is fixedly connected heat exchange board through pipeline, the control valve of pipeline outer wall between heat exchange board is fixedly connected with in the tower body, one end of heat exchange board is fixedly connected with condenser inside through multiple groups of pipeline, one end of condenser is fixedly connected with compressor inside through pipeline, the compressor is fixedly connected with evaporator inside through pipeline, the evaporator outer wall is fixedly connected with the outlet valve. The utility model discloses through the evaporator bypass loop and the cooling tower seasonality stop using, has solved the water chilling unit cold quantity excess, and after combining the external environment, the excessive cooling of easy emergence makes the cold water pool or the cooling pipeline with cold water ice, makes the pipeline rupture or pipeline blockage and causes the technical problem of equipment damage.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment, specifically a device for preventing overcooling in a water chiller unit. Background Technology

[0002] Chillers, also known as freezers, refrigeration units, ice water units, or cooling equipment, are a type of refrigeration equipment. In the refrigeration industry, they are divided into air-cooled chillers and water-cooled chillers. Based on the compressor, they are further divided into screw chillers, scroll chillers, and centrifugal chillers. In terms of temperature control, they are divided into low-temperature industrial chillers and normal-temperature chillers. Normal-temperature chillers are generally controlled within the range of 0℃ to 35℃, while low-temperature chillers are generally controlled within the range of 0℃ to -100℃.

[0003] Common low-temperature chillers are specialized chillers designed for special low-temperature environments. Their superior cooling capacity provides reliable protection for food preservation in commercial establishments such as hotels, restaurants, and supermarkets; for the rapid freezing and refrigeration of meat and seafood in large cold storage facilities; for ice making; for food processing freezing / refrigeration; and for various low-temperature environments such as pharmaceuticals and chemicals. However, in some low-temperature areas during winter, the chiller unit may have excessive cooling capacity. Combined with the external environment, this can easily lead to overcooling, causing the chilled water tank or cooling pipes containing chilled water to freeze, resulting in pipe rupture or blockage and equipment damage. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a device for preventing overcooling in a chiller unit, so as to solve the technical problem that excessive cooling capacity of the chiller unit, combined with the external environment, can easily lead to overcooling, causing the chilled water pool or cooling pipes containing chilled water to freeze, resulting in pipe rupture or blockage and equipment damage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A chiller unit for preventing overcooling includes a cooling tower, which consists of a fan, a tower body, heat exchange plates, and a control valve. The tower body houses multiple sets of motors and pipes, and the fan is fixedly connected to the tower body via the motor output end. The heat exchange plates are fixedly connected to the tower body via pipes. A control valve is fixedly connected to the tower body on the outer wall of the pipes located between the heat exchange plates. One end of the heat exchange plates is fixedly connected to the interior of a condenser via multiple sets of pipes. One end of the condenser is fixedly connected to the interior of a compressor via pipes. One end of the compressor is also fixedly connected to the interior of an evaporator via pipes. A water outlet valve is fixedly connected to the outer wall of the evaporator. The water outlet valve penetrates the interior of the evaporator and is fixedly connected to the interior of a water tank via pipes. The interior of the water tank is fixedly connected to the interior of a liquid cooling device via pipes. A water inlet valve is fixedly connected to the interior of the liquid cooling device via pipes. The water inlet valve penetrates the outer wall of the evaporator and is fixedly connected to the interior of the evaporator. A bypass pipe is fixedly connected between the water inlet valve and the water outlet valve, and a bypass valve is fixedly connected to the bypass pipe.

[0006] By adopting the above technical solution, the cooling tower has multiple layers of copper pipes. A fan driven by a motor inside the tower cools the copper pipes. Low-temperature water flows to the condenser through an external heat exchange plate. The low-temperature water exchanges heat with the high-temperature, high-pressure refrigerant. The low-temperature water absorbs heat and flows back into the cooling tower to dissipate heat again, while the high-temperature, high-pressure refrigerant dissipates heat and transforms into a low-temperature, high-pressure liquid-gas mixture refrigerant, which flows into the evaporator through pipes. The evaporator is connected to the water tank through pipes. Water in the water tank is pumped by a water pump and transported through pipes to the liquid cooling device to release cooling capacity. The cold water absorbs heat and rises in temperature through the liquid cooling device, then enters the evaporator through the inlet valve. The hot water exchanges heat with the low-temperature, low-pressure refrigerant in the pipes inside the evaporator. The hot water absorbs heat and cools down, turning into cold water, which is discharged from the evaporator through the outlet valve. The cold water flows into the water tank through pipes to complete one cycle. Meanwhile, the low-temperature, low-pressure gaseous refrigerant absorbs heat and rises in temperature, transforming into a normal-temperature, low-pressure gaseous refrigerant, which flows back to the compressor through pipes to complete one refrigeration cycle.

[0007] Furthermore, the condenser is fixedly connected to a drying bottle via a pipe, and the drying bottle is fixedly connected to an expansion valve via a pipe. The expansion valve serves to reduce pressure and throttle flow.

[0008] By adopting the above technical solution, the high-temperature and high-pressure refrigerant heats up and is converted into a low-temperature and high-pressure liquid-gas mixture refrigerant, which flows through the pipeline to the dryer bottle for filtration and drying. The low-temperature and high-pressure liquid-gas mixture refrigerant then flows back to the expansion valve, where it is depressurized and throttled.

[0009] Furthermore, the water tank is fixedly connected to a water pump via a pipe. The water pump draws cold water from the tank to provide water circulation. The water pump is also fixedly connected to a liquid cooling device via a pipe. The liquid cooling device releases cold energy to cool external equipment.

[0010] By adopting the above technical solution, the water in the water tank is pumped out by the water pump and transported through the pipeline to the liquid cooling device to release the cooling capacity. The cold water absorbs heat and rises in temperature through the liquid cooling device and enters the evaporator through the water inlet valve. The compressor is fixedly connected to a three-way valve via a pipeline. The three-way valve serves to dilute the low-temperature, low-pressure gaseous refrigerant.

[0011] In summary, the present invention has the following main advantages: By adding an evaporator bypass loop and a seasonal shutdown mechanism for the cooling tower, the system risk of pipe icing due to over-cooling in low-temperature environments is effectively resolved. When the ambient temperature is too low, the evaporator bypass valve is opened to allow some hot water to directly mix into the cold water outlet, actively raising the water temperature to prevent icing. At the same time, the cooling tower control valve is closed, allowing the cooling water discharged from the condenser to naturally exchange heat with the ambient air through the heat exchange plates, reducing condensation efficiency. This dual regulation mechanism works synergistically to suppress the intensity of the refrigeration cycle at its source and significantly weaken the tendency of the evaporator to overcool through precise control of the terminal water temperature. The entire solution makes full use of the free cold source in the low-temperature winter environment to achieve system balance, reducing mechanical refrigeration energy consumption while eliminating water circuit icing failures, significantly improving the operational reliability and adaptability of the equipment in extremely cold regions, and the modified structure is simple and efficient. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the appearance of the present utility model; Figure 2 This is a schematic diagram of the left side appearance structure of this utility model; Figure 3 This is a schematic diagram of the right-side appearance structure of this utility model; Figure 4 This is a schematic diagram of the top surface mechanism of this utility model.

[0013] In the diagram: 1. Cooling tower; 101. Fan; 102. Tower body; 103. Control valve; 104. Heat exchange plate; 2. Condenser; 3. Compressor; 4. Dryer bottle; 5. Expansion valve; 6. Evaporator; 601. Outlet valve; 602. Inlet valve; 7. Water tank; 8. Liquid cooling device; 9. Pipeline; 10. Three-way valve; 11. Bypass valve; 12. Water pump. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0015] The embodiments of this utility model will be described below based on its overall structure.

[0016] A chiller unit for preventing overcooling, such as Figure 1-4 As shown, the cooling tower 1 consists of a fan 101, a tower body 102, a heat exchange plate 104, and a control valve 103. The tower body 102 has multiple sets of motors and pipes 9 built in it, and the fan 101 is fixedly connected to the tower body 102 through the output end of the motor. The heat exchange plate 104 is fixedly connected to the tower body 102 through the pipes 9. The control valve 103 located on the outer wall of the pipes 9 between the heat exchange plates 104 is fixedly connected to the tower body 102. One end of the heat exchange plate 104 is fixedly connected to the inside of the condenser 2 through multiple sets of pipes 9. Cooling tower 1 should be shut down in winter. The control valve 103 on the pipe 9 connecting tower body 102 and heat exchange plate 104 is closed, so that the hot water flowing out of condenser 2 cannot flow into cooling tower 1. Instead, it flows back into heat exchange plate 104 through the cross-flow pipe in the middle of the pipe 9 connecting the end of heat exchange plate 104 and tower body 102. The hot water in heat exchange plate 104 uses the external environment for free heat exchange and inputs the cooling water back into condenser 2 to complete one cycle. Furthermore, one end of the condenser 2 is fixedly connected to the inside of the compressor 3 via a pipe 9, and the other end of the compressor 3 is also fixedly connected to the inside of the evaporator 6 via a pipe 9. A water outlet valve 601 is fixedly connected to the outer wall of the evaporator 6. The water outlet valve 601 passes through the inside of the evaporator 6 and is fixedly connected to the inside of the water tank 7 via a pipe 9. The inside of the water tank 7 is fixedly connected to the inside of the liquid cooling device 8 via a pipe 9. A water inlet valve 602 is fixedly connected to the inside of the liquid cooling device 8 via a pipe 9. The water inlet valve 602 passes through the outer wall of the evaporator 6 and is fixedly connected to the inside of the evaporator 6. A bypass pipe 9 is fixedly connected between the water inlet valve 602 and the water outlet valve 601. A bypass valve 11 is fixedly connected to the bypass pipe 9. Inside the condenser 2, low-temperature water exchanges heat with high-temperature, high-pressure refrigerant. The low-temperature water absorbs heat and flows back into the cooling tower 11 to dissipate heat again, while the high-temperature, high-pressure refrigerant dissipates heat and transforms into a low-temperature, high-pressure liquid-gas mixture refrigerant, which flows into the evaporator 6 through pipe 9. The evaporator 6 is connected to the water tank 7 through pipe 9. Water in the water tank 7 is pumped by water pump 12 and transported through pipe 9 to the liquid cooling device 8 to release cooling capacity. The cold water absorbs heat and rises in temperature after passing through the liquid cooling device 8, and enters the evaporator 6 through the inlet valve 602. The hot water exchanges heat with the low-temperature, low-pressure refrigerant in pipe 9 inside the evaporator 6. The hot water absorbs heat and cools down, turning into cold water, which is discharged from the evaporator 6 through the outlet valve 601. The cold water flows into the water tank 7 through pipe 9 to complete one cycle. Meanwhile, the low-temperature, low-pressure gaseous refrigerant absorbs heat and rises in temperature, transforming into a normal-temperature, low-pressure gaseous refrigerant, which flows back to the compressor 3 through pipe 9 to complete one refrigeration cycle.

[0017] Please see Figure 1 , Figure 2 and Figure 3The condenser 2 is fixedly connected to the dryer bottle 4 through the pipe 9, and the dryer bottle 4 is fixedly connected to the expansion valve 5 through the pipe 9. The expansion valve 5 plays the role of reducing pressure and throttling. The high-temperature, high-pressure refrigerant dissipates heat and transforms into a low-temperature, high-pressure liquid-gas mixture refrigerant, which flows through pipe 9 to the drying bottle 4 for filtration and drying. The low-temperature, high-pressure liquid-gas mixture refrigerant then flows back to the expansion valve 5, where it is depressurized and throttled.

[0018] Please see Figure 1 , Figure 2 and Figure 3 The water tank 7 is fixedly connected to the water pump 12 through the pipe 9. The water pump 12 is used to draw cold water from the water tank 7 to provide water circulation. The water pump 12 is fixedly connected to the liquid cooling device 8 through the pipe 9. The liquid cooling device 8 is used to release cold energy to cool the external equipment. The water in the water tank 7 is drawn by the water pump 12 and transported through the pipe 9 to the liquid cooling device 8 to release its cooling capacity. The cold water absorbs heat and rises in temperature after passing through the liquid cooling device 8, and then enters the evaporator 6 through the water inlet valve 602.

[0019] The working principle of this utility model is as follows: When the power is turned on, the equipment starts and the compressor 3 begins to work, compressing the gaseous refrigerant at normal temperature and pressure into a high-temperature and high-pressure gaseous refrigerant, which is then fed into the condenser 2 through pipe 9. The condenser 2 is connected to the cooling tower 1 through pipe 9. The cooling tower 1 has multiple layers of copper pipes, and the fan 101 driven by the motor inside the tower body 102 cools the copper pipes. Low-temperature water flows into the condenser 2 through the heat exchange plate 104 outside the tower body 102. The low-temperature water exchanges heat with the high-temperature and high-pressure refrigerant. The low-temperature water absorbs heat and flows back into the cooling tower 11 to dissipate heat again, while the high-temperature and high-pressure refrigerant dissipates heat and is converted into a low-temperature and high-pressure liquid-gas mixture refrigerant, which flows through pipe 9 to the drying bottle 4 for filtration and drying. The low-temperature and high-pressure liquid-gas mixture refrigerant then flows back to the expansion valve. 5. Through the expansion valve 5, the low-temperature, high-pressure liquid-gas mixture refrigerant is converted into a low-temperature, low-pressure gaseous refrigerant and flows into the evaporator 6. The evaporator 6 is connected to the water tank 7 through the pipe 9. The water in the water tank 7 is drawn by the water pump 12 and transported to the liquid cooling device 8 through the pipe 9 to release the cooling capacity. The cold water absorbs heat and rises in temperature through the liquid cooling device 8 and enters the evaporator 6 through the water inlet valve 602. The hot water exchanges heat with the low-temperature, low-pressure refrigerant in the pipe 9 in the evaporator 6. The hot water absorbs heat and cools down, turning into cold water and is discharged from the evaporator 6 through the water outlet valve 601. The cold water flows into the water tank 7 through the pipe 9 to complete one cycle. Meanwhile, the low-temperature, low-pressure gaseous refrigerant absorbs heat and rises in temperature, turning into a normal-temperature, low-pressure gaseous refrigerant. The refrigerant flows back to the compressor 3 through the pipe 9 to complete one refrigeration cycle. However, in some low-temperature areas, after entering winter, the chiller unit often faces the problem of excessive cooling efficiency due to the influence of the external environment. This leads to overcooling of the chiller unit, and the hot water in the liquid cooling device 8 flows into the evaporator 6 and freezes due to excessive cooling, causing blockage of the pipe 9 and triggering a series of equipment failures. A cross-flow pipe 9 connects the outlet valve 601 and the inlet valve 602 of the evaporator 6. A bypass valve 11 is installed on the pipe 9. When the ambient temperature is below the limit, the bypass valve 11 opens. When the hot water supplied from the liquid cooling device 8 passes through the inlet valve, some of the hot water enters the cross-flow pipe 9 and flows to the outlet valve 601 via the bypass valve 11. It mixes with the cold water flowing out of the evaporator 6 to raise the temperature and prevent overcooling. However, this is not enough. The cooling tower 1 should stop working in winter. The control valve 103 on the pipe 9 connecting the tower body 102 and the heat exchange plate 104 is closed, so that the hot water flowing out of the condenser 2 cannot flow into the cooling tower 1. It flows back into the heat exchange plate 104 through the cross-flow pipe in the middle of the pipe 9 connecting the end of the heat exchange plate 104 and the tower body 102. The hot water in the heat exchange plate 104 uses the external environment for free heat exchange and inputs the cooling water back into the condenser 2 to complete one cycle. This reduces the cooling efficiency of the condenser 2 and further reduces the working efficiency of the evaporator 6, thus reducing the risk of overcooling of the chiller unit.

[0020] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A chiller unit for preventing overcooling, comprising a cooling tower (1), characterized in that: The cooling tower (1) consists of a fan (101), a tower body (102), heat exchange plates (104), and a control valve (103). The tower body (102) has multiple sets of motors and pipes (9) built in. The fan (101) is fixedly connected to the tower body (102) through the motor output end. The heat exchange plates (104) are fixedly connected to the tower body (102) through pipes (9). The control valve (103) located on the outer wall of the pipes (9) between the heat exchange plates (104) is fixedly connected to the tower body (102). One end of the heat exchange plate (104) is fixedly connected to the inside of the condenser (2) through multiple sets of pipes (9). One end of the condenser (2) is fixedly connected to the inside of the compressor (3) through pipes (9). The compressor (3) One end is also fixedly connected to the inside of the evaporator (6) through a pipe (9). A water outlet valve (601) is fixedly connected to the outer wall of the evaporator (6). The water outlet valve (601) passes through the inside of the evaporator (6) and is fixedly connected to the inside of the water tank (7) through a pipe (9). The inside of the water tank (7) is fixedly connected to the inside of the liquid cooling device (8) through a pipe (9). The inside of the liquid cooling device (8) is fixedly connected to the water inlet valve (602) through a pipe (9). The water inlet valve (602) passes through the outer wall of the evaporator (6) and is fixedly connected to the inside of the evaporator (6). A bypass pipe (9) is fixedly connected between the water inlet valve (602) and the water outlet valve (601). A bypass valve (11) is fixedly connected to the bypass pipe (9).

2. The chiller unit for preventing overcooling according to claim 1, characterized in that: The condenser (2) is fixedly connected to a drying bottle (4) via a pipe (9), and the drying bottle (4) is fixedly connected to an expansion valve (5) via a pipe (9). The expansion valve (5) serves to reduce pressure and throttle flow.

3. A device for preventing overcooling in a chiller unit according to claim 1, characterized in that: The water tank (7) is fixedly connected to the water pump (12) through the pipe (9), and the water pump (12) plays the role of drawing cold water from the water tank (7) to provide water circulation.

4. A device for preventing overcooling in a chiller unit according to claim 3, characterized in that: The water pump (12) is fixedly connected to the liquid cooling device (8) through the pipe (9), and the liquid cooling device (8) plays the role of releasing cold energy to cool the external instruments.

5. A device for preventing overcooling in a chiller unit according to claim 1, characterized in that: The compressor (3) is fixedly connected to a three-way valve (10) via a pipe (9). The three-way valve (10) serves to dilute the low-temperature, low-pressure gaseous refrigerant.

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