Cooling structure of water chilling unit

Abstract

The utility model belongs to the technical field of water chilling units, and particularly discloses a cooling structure of a water chilling unit, which comprises a first heat exchanger, a second heat exchanger and a condenser, a liquid outlet of the first heat exchanger is communicated with a liquid inlet of a compressor, and an outlet end of the compressor is communicated with an air inlet of an evaporator. The outlet end of the evaporator is connected with the inlet end of the first heat exchanger; an outlet in one end of the first heat exchanger is connected with a first refrigeration module, the first refrigeration module comprises a second heat exchanger and a first cooling tower, a first loop is arranged between the second heat exchanger and the first cooling tower, a heat exchanger is arranged on one side of the first cooling tower, and a filter is arranged at the outlet end of the first cooling tower. The first cooling tower is connected with a circulating water pump; an inlet in one end of the first heat exchanger is communicated with a second refrigeration module, the second refrigeration module comprises a condenser and a second cooling tower, and a second loop is arranged between the condenser and the second cooling tower.

Description

Technical Field

[0001] The utility model relates to the technical field of chillers, and specifically relates to a cooling structure of a chiller unit. Background Technique

[0002] A chiller is generally a refrigeration device that provides chilled water and is suitable for use in central air-conditioning systems and industrial process applications that require chilled water. It is widely used in large and medium-sized central air-conditioning systems such as hotels, office buildings, hospitals, and shopping malls, and is more suitable as a process cold source for the production and processing of non-ferrous metal smelting, chemical industry, pharmaceutical intermediates, petrochemical industry, grain and oil, food, machinery, medicine, electronics, etc. At the same time, it can provide hot water at 30-50°C for heating.

[0003] In the prior art, there was a publicly disclosed technical solution for a chiller unit. Chinese Patent Application No.: A cooling structure of a heat pipe type high-efficiency chiller unit, Application Date: August 5, 2020, Invention Creation Name: A cooling structure of a heat pipe type high-efficiency chiller unit. This application discloses a cooling structure of a heat pipe type high-efficiency chiller unit, including a chiller unit and a cooling tower. The chiller unit includes a condenser, and the condenser is thermally conductively connected to the cooling tower through a heat pipe. The heat pipe, condenser, and cooling tower form a loop to enable the cooling tower to cool the condenser through the heat pipe. The chiller unit also includes an evaporator, a throttle valve, and a compressor. It also includes a cooling water pump, and the cooling water pump, condenser, and cooling tower are connected in series to form a loop. By using the heat pipe to transfer the heat of the condenser to the cooling tower through heat conduction, water loss caused by the original cooling water flowing through pipes and valves is avoided; energy consumption loss due to mechanical work is avoided, making the cooling efficiency of the chiller unit higher;

[0004] The above application solution uses a single cold source for refrigeration, and during specific use, the cooling water temperature cannot be precisely adjusted, making it not suitable for occasions with high temperature control requirements. Therefore, the chiller unit is improved based on the above application case. Content of the Utility Model

[0005] The purpose of the utility model is to provide a cooling structure of a chiller unit to solve the problems raised in the above background technique.

[0006] To achieve the above object, the utility model provides the following technical solution: A cooling structure for a water chiller, including a first heat exchanger, a second heat exchanger and a condenser. The liquid outlet of the first heat exchanger is connected to the liquid inlet of the compressor. The outlet end of the compressor is connected to the air inlet of the evaporator. The outlet end of the evaporator is connected to the inlet end of the first heat exchanger. One end outlet of the first heat exchanger is connected to a first refrigeration module, and the first refrigeration module includes a second heat exchanger and a first cooling tower. A first loop is provided between the second heat exchanger and the first cooling tower. A first cooling water pump is provided on the pipeline connecting the outlet end of the first cooling tower to the inlet end of the second heat exchanger. A heat exchanger is provided on one side of the first cooling tower. A filter is provided at the outlet end of the first cooling tower. The first cooling tower is connected to a circulating water pump. One end inlet of the first heat exchanger is connected to a second refrigeration module, and the second refrigeration module includes a condenser and a second cooling tower. A second loop is provided between the condenser and the second cooling tower. A second cooling water pump is provided on the pipeline connecting the outlet end of the second cooling tower to the inlet end of the condenser.

[0007] Preferably, a throttle valve is provided on the connecting pipeline between the first heat exchanger and the evaporator.

[0008] Preferably, a heat exchanger is provided on one side of the first cooling tower. A filter is provided at the outlet end of the first cooling tower. The first cooling tower is connected to a circulating water pump.

[0009] Preferably, a heat pipe is provided between the condenser and the second cooling tower to form a heat conduction connection loop.

[0010] Preferably, a chilled water pump is provided on the pipeline connecting the outlet end of the condenser to the inlet end of the first heat exchanger.

[0011] Compared with the prior art, the beneficial effect of the utility model is: The utility model sets a first refrigeration module and a second refrigeration module, adopts a dual cold source system to make full use of natural cold source and mechanical cold source, adopts multi-stage cooling to realize temperature control, and can flexibly select the optimal operation mode under different loads and environmental conditions, thereby improving the refrigeration efficiency and energy efficiency ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] In the figure: 1. First heat exchanger; 2. Compressor; 3. Evaporator; 4. Throttle valve; 5. Second heat exchanger; 6. First cooling tower; 7. First cooling water pump; 8. Heat exchanger; 9. Circulating water pump; 10. Filter; 11. Condenser; 12. Second cooling tower; 13. Cooling water pump; 14. Heat pipe; 15. Chilled water pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0016] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0017] Please refer to Figure 1 , the present invention provides a technical solution: a cooling structure of a water chiller, including a first heat exchanger 1, a second heat exchanger 5 and a condenser 11. The liquid outlet of the first heat exchanger 1 is communicated with the liquid inlet of the compressor 2. The outlet end of the compressor 2 is connected to the gas inlet of the evaporator 3, and the outlet end of the evaporator 3 is connected to the inlet end of the first heat exchanger 1; one end outlet of the first heat exchanger 1 is connected to a first refrigeration module, and the first refrigeration module includes a second heat exchanger 5 and a first cooling tower 6. A first loop is provided between the second heat exchanger 5 and the first cooling tower 6. A first cooling water pump 7 is provided on the pipeline connecting the outlet end of the first cooling tower 6 to the inlet end of the second heat exchanger 5. A heat exchanger 8 is provided on one side of the first cooling tower 6. A filter 10 is provided at the outlet end of the first cooling tower 6. The first cooling tower 6 is connected to a circulating water pump 9; one end inlet of the first heat exchanger 1 is connected to a second refrigeration module, and the second refrigeration module includes a condenser 11 and a second cooling tower 12. A second loop is provided between the condenser 11 and the second cooling tower 12. A second cooling water pump 13 is provided on the pipeline connecting the outlet end of the second cooling tower 12 to the inlet end of the condenser 11.

[0018] Further, a throttle valve 4 is provided on the connecting pipeline between the first heat exchanger 1 and the evaporator 3.

[0019] Further, a heat exchanger 8 is provided on one side of the first cooling tower 6, a filter 10 is provided at the outlet end of the first cooling tower 6, the first cooling tower 6 is connected to a circulating water pump 9, and the filter 10 ensures that the cooling water entering the heat exchanger 8 is clean and free of impurities.

[0020] Further, a heat pipe 14 is provided between the condenser 11 and the second cooling tower 12 to form a heat conduction connection loop.

[0021] Further, a chilled water pump 15 is provided on the pipeline connecting the outlet end of the condenser 11 to the inlet end of the first heat exchanger 1.

[0022] Working principle: The utility model provides a cooling structure for a chiller, which includes a first heat exchanger 1, a second heat exchanger 5 and a condenser 11. The liquid outlet of the first heat exchanger 1 is connected to the liquid inlet of the compressor 2, the outlet end of the compressor 2 is connected to the gas inlet of the evaporator 3, and the outlet end of the evaporator 3 is connected to the inlet end of the first heat exchanger 1; One end outlet of the first heat exchanger 1 is connected to a first refrigeration module, and the first refrigeration module includes a second heat exchanger 5 and a first cooling tower 6. A first loop is provided between the second heat exchanger 5 and the first cooling tower 6. A first cooling water pump 7 is provided on the pipeline connecting the outlet end of the first cooling tower 6 to the inlet end of the second heat exchanger 5. A heat exchanger 8 is provided on one side of the first cooling tower 6, a filter 10 is provided at the outlet end of the first cooling tower 6, and the first cooling tower 6 is connected to a circulating water pump 9; One end inlet of the first heat exchanger 1 is connected to a second refrigeration module, and the second refrigeration module includes a condenser 11 and a second cooling tower 12. A second loop is provided between the condenser 11 and the second cooling tower 12. A second cooling water pump 13 is provided on the pipeline connecting the outlet end of the second cooling tower 12 to the inlet end of the condenser 11; During specific use, when the low-temperature liquid refrigerant passes through the evaporator 3, the liquid refrigerant in the evaporator 3 exchanges heat with the outside air, vaporizes and absorbs heat to achieve a refrigeration effect. After vaporization, the high-temperature gaseous refrigerant inside the evaporator 3 enters the first heat exchanger 1. The chilled water passing through the first heat exchanger 1 exchanges heat with the high-temperature gaseous refrigerant to convert the high-temperature gaseous refrigerant into a low-temperature liquid refrigerant. The liquid refrigerant then enters the evaporator 3 to vaporize and circulate for refrigeration. The first refrigeration module uses a natural cold source. The first cooling tower 6 of the first refrigeration module provides cooling water for the second heat exchanger 5. The chilled water outlet of the second heat exchanger 5 is connected to the condenser 11 of the second refrigeration module. The chilled water exchanges heat and warms up in the first heat exchanger 1, then enters the second heat exchanger 5 to cool down, and then flows to the condenser 11, effectively reducing the load of the condenser 11. The condenser 11 provides cooling water for the first heat exchanger 1. During the refrigeration process, the second cooling tower 12 replenishes the lost cooling water for the condenser 11. A heat exchanger 8 is connected to one side of the first cooling tower 6 of the first refrigeration module to achieve indirect heat transfer of the cooling water and reasonably control the temperature of the cooling water, improving stability. The second refrigeration module retains the heat pipe 14 for heat transfer to reduce energy consumption. The overall device adopts a dual cold source system to make full use of natural cold sources and mechanical cold sources, adopts multi-stage cooling, and realizes temperature control. It can flexibly select the optimal operation mode under different loads and environmental conditions, thereby improving the refrigeration efficiency and energy efficiency ratio.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chiller cooling structure, characterized in that: The invention comprises a first heat exchanger (1), a second heat exchanger (5) and a condenser (11), wherein the liquid outlet of the first heat exchanger (1) is connected to the liquid inlet of the compressor (2), the outlet end of the compressor (2) is connected to the air inlet of the evaporator (3), and the outlet end of the evaporator (3) is connected to the inlet end of the first heat exchanger (1); one outlet end of the first heat exchanger (1) is connected to a first refrigeration module, the first refrigeration module comprises a second heat exchanger (5) and a first cooling tower (6), a first loop is provided between the second heat exchanger (5) and the first cooling tower (6), the outlet end of the first cooling tower (6) is connected to the second heat exchanger (5) ), a first cooling water pump (7) is arranged on the inlet pipeline of the first cooling tower (6), a heat exchanger (8) is arranged on one side of the first cooling tower (6), a filter (10) is arranged at the outlet of the first cooling tower (6), and the first cooling tower (6) is connected to a circulating water pump (9); an inlet of one end of the first heat exchanger (1) is connected to a second refrigeration module, the second refrigeration module comprises a condenser (11) and a second cooling tower (12), a second loop is arranged between the condenser (11) and the second cooling tower (12), and a second cooling water pump (13) is arranged on the pipeline of the outlet of the second cooling tower (12) connected to the inlet of the condenser (11).

2. A chiller cooling structure according to claim 1, characterized in that: A throttle valve (4) is provided on the connecting pipeline between the first heat exchanger (1) and the evaporator (3).

3. A chiller cooling structure according to claim 1, characterized in that: A heat exchanger (8) is provided on one side of the first cooling tower (6), a filter (10) is provided at the outlet end of the first cooling tower (6), and the first cooling tower (6) is connected to a circulating water pump (9).

4. A chiller cooling structure according to claim 1, characterized in that: A heat pipe (14) is arranged between the condenser (11) and the second cooling tower (12) to form a heat conduction connection loop.

5. The cooling structure of a chiller according to claim 1, characterized in that: A chilled water pump (15) is provided on the pipeline connecting the outlet end of the condenser (11) to the inlet end of the first heat exchanger (1).

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