Air-cooled chiller unit

Abstract

The utility model relates to the technical field of air-cooled chiller units, in particular to an air-cooled chiller unit. The air conditioner comprises a compressor and a controller, an exhaust port of the compressor is connected with an air inlet of a condenser through an exhaust pipe, a liquid outlet of the condenser is connected with a liquid inlet of an expansion valve through a liquid discharge pipe, and a liquid outlet of the expansion valve is connected with a liquid inlet of an evaporator through a pipeline. An air outlet of the evaporator is connected with an air inlet of the gas-liquid separator through a pipeline, and an air outlet of the gas-liquid separator is connected with an air suction port of the compressor through an air suction pipe. The unit is provided with the high-pressure transmitter, the low-pressure transmitter and the electric air valve, the condensing fan adopts a variable-frequency fan, and the unit controller can control the rotating speed of the condensing fan and the opening degree of the air valve according to a high-pressure signal detected by the high-pressure transmitter, so that the high pressure of a refrigerating system of the unit is within a relatively ideal pressure range; and various environment temperatures are adapted.

Description

Technical Field

[0001] The utility model relates to the technical field of air-cooled water chillers, in particular to an air-cooled water chiller. Background Art

[0002] At present, the air-cooled chillers used in the market generally have an operating temperature range of 15°C to 43°C. When the ambient temperature is low, the high pressure is relatively low, and the pressure difference before and after the expansion valve cannot be established, so the unit cannot operate normally. When there are multiple condensing fans, the pressure difference is sometimes established by starting and stopping the number of fans. The pressure difference fluctuates greatly and the refrigeration system is unstable. Sometimes in extremely cold areas with high wind speeds, after the condensing fan stops, the natural heat dissipation of the condenser is still large, and the pressure difference cannot be established, so the unit cannot operate normally. Conventional air-cooled chillers do not have a water system. When using them, users need to match the water system themselves, which is complicated to install. Utility Model Content

[0003] In response to the shortcomings of the above-mentioned existing production technology, the present application provides an air-cooled chiller unit, in which the unit controller can control the speed of the condensing fan and the opening of the air valve according to the high-pressure signal detected by the high-pressure pressure transmitter, so that the high pressure of the unit's refrigeration system is within a relatively ideal pressure range and adapts to various ambient temperatures, so that the unit can operate reliably around the clock.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An air-cooled chiller comprises a compressor and a controller, wherein the exhaust port of the compressor is connected to the air inlet of a condenser through an exhaust pipe, the liquid outlet of the condenser is connected to the liquid inlet of an expansion valve through a liquid pipe, the liquid outlet of the expansion valve is connected to the liquid inlet of an evaporator through a pipeline, the air outlet of the evaporator is connected to the air inlet of a gas-liquid separator through a pipeline, and the air outlet of the gas-liquid separator is connected to the air intake of the compressor through an air intake pipe;

[0006] An axial flow fan is arranged at the air outlet of the condenser, and the axial flow fan can discharge the heated air flowing through the condenser into the atmosphere. An electric air valve is arranged at the air inlet of the condenser, and the opening, closing and opening degree of the electric air valve can control the air volume flowing through the condenser. The electric air valve is connected to the electric air valve actuator, and the electric air valve actuator can control the opening degree of the electric air valve; a high-pressure pressure transmitter is connected to the liquid pipe, and the controller is electrically connected to the high-pressure pressure transmitter, the electric air valve actuator and the axial flow fan respectively. The controller controls the rotation speed of the axial flow fan and the opening degree of the electric air valve according to the high-pressure parameters transmitted by the high-pressure pressure transmitter.

[0007] Furthermore, the water inlet of the evaporator is connected to the water outlet of the water pump through a pipeline, the water inlet of the water pump is connected to the water outlet of the cold water tank through a pipeline, and the water outlet of the evaporator is connected to the water inlet of the cold water tank through a pipeline.

[0008] Furthermore, a water pressure gauge is connected to the pipe between the water outlet of the evaporator and the water inlet of the cold water tank, and the water pressure gauge can detect the pressure of the liquid in the pipe in real time. A cold water temperature sensor is connected to the pipe between the water outlet of the evaporator and the water inlet of the cold water tank, and the cold water temperature sensor can detect the temperature of the liquid in the pipe in real time. A water flow switch is connected to the pipe between the water outlet of the evaporator and the water inlet of the cold water tank.

[0009] Furthermore, a low pressure gauge is connected to the suction pipe, and the low pressure gauge can detect the pressure in the pipeline in real time.

[0010] Furthermore, the exhaust pipe is connected to a high pressure gauge, which can detect the pressure in the pipeline in real time.

[0011] Furthermore, an exhaust temperature sensor is connected to the exhaust port of the compressor, and the exhaust temperature sensor can detect the temperature of the exhaust port of the compressor in real time.

[0012] Furthermore, a low-pressure pressure transmitter is connected to the pipeline between the evaporator and the gas-liquid separator.

[0013] Furthermore, the liquid pipe is connected to a drying filter, and the liquid in the liquid pipe can be filtered when passing through the drying filter.

[0014] Furthermore, the controller is electrically connected to the low-pressure pressure transmitter, the exhaust temperature sensor, the cold water temperature sensor, and the water flow switch, respectively. The low-pressure pressure transmitter, the exhaust temperature sensor, the cold water temperature sensor, and the water flow switch transmit various parameters to the controller. The controller automatically adjusts the speed of the axial flow fan and the opening of the electric air valve according to the detected parameters, and when the pressure parameters are abnormal and reach the warning value, the controller controls the unit to shut down for protection, and sends out an alarm signal to improve the safety of the unit operation.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model unit is designed with high and low pressure transmitters and electric air valves. The condensing fan adopts a variable frequency fan. The unit controller can control the speed of the condensing fan and the opening of the air valve according to the high-pressure signal detected by the high-pressure pressure transmitter, so that the high pressure of the unit refrigeration system is within a relatively ideal pressure range and can adapt to various ambient temperatures. The utility model unit is designed with multiple protections such as exhaust temperature too high, high pressure too high, low pressure too low, chilled water flow, compressor overload, water pump overload, etc., and the unit has high safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the structural principle diagram of the utility model.

[0018] Figure 2 This is a working principle diagram of the controller of the present utility model.

[0019] Among them: 1. Compressor; 2. Exhaust temperature sensor; 3. Exhaust pipe; 4. Liquid pipe; 6. High pressure gauge; 7. Low pressure gauge; 8. Water pressure gauge; 9. Controller; 10. High pressure transmitter; 11. Dry filter; 12. Evaporator; 13. Expansion valve; 14. Low pressure transmitter; 15. Intake pipe; 16. Gas-liquid separator; 17. Water pump; 18. Cold water temperature sensor; 19. Cold water tank; 20. Water flow switch; 21. Axial fan; 22. Condenser; 23. Electric air valve; 24. Electric air valve actuator. DETAILED DESCRIPTION

[0020] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, an air-cooled chiller includes a compressor 1, the exhaust port of the compressor 1 is connected to the air inlet of the condenser 22 through an exhaust pipe 3, the liquid outlet of the condenser 22 is connected to the liquid inlet of the expansion valve 13 through a liquid pipe 4, the liquid outlet of the expansion valve 13 is connected to the liquid inlet of the evaporator 12 through a pipeline, the air outlet of the evaporator 12 is connected to the air inlet of the gas-liquid separator 16 through a pipeline, and the air outlet of the gas-liquid separator 16 is connected to the air intake of the compressor 1 through an air intake pipe 15.

[0022] like Figure 1 As shown, an axial flow fan 21 is arranged at the air outlet of the condenser 22, and the axial flow fan 21 can discharge the heated air flowing through the condenser 22 into the atmosphere, and an electric air valve 23 is arranged at the air inlet of the condenser 22, and the opening, closing and opening degree of the electric air valve 23 can control the air volume flowing through the condenser 22. The electric air valve 23 is connected to the electric air valve actuator 24, and the electric air valve actuator 24 can control the opening degree of the electric air valve 23.

[0023] like Figure 1 As shown, the water inlet of the evaporator 12 is connected to the water outlet of the water pump 17 through a pipeline, the water inlet of the water pump 17 is connected to the water outlet of the cold water tank 19 through a pipeline, and the water outlet of the evaporator 12 is connected to the water inlet of the cold water tank 19 through a pipeline.

[0024] like Figure 1 As shown, the exhaust pipe 3 is connected to a high pressure gauge 6, which can detect the pressure in the pipeline in real time. The exhaust port of the compressor 1 is connected to an exhaust temperature sensor 2, which can detect the temperature of the exhaust port of the compressor 1 in real time.

[0025] like Figure 1 As shown, the liquid pipe 4 is connected to a high-pressure pressure transmitter 10 , and the pipeline between the evaporator 12 and the gas-liquid separator 16 is connected to a low-pressure pressure transmitter 14 .

[0026] like Figure 1 As shown, the liquid pipe 4 is connected to a drying filter 11 , and the liquid in the liquid pipe 4 can be filtered when passing through the drying filter 11 .

[0027] like Figure 1 As shown, a water pressure gauge 8 is connected to the pipeline between the water outlet of the evaporator 12 and the water inlet of the cold water tank 19, and the water pressure gauge 8 can detect the pressure of the liquid in the pipeline in real time. A cold water temperature sensor 18 is connected to the pipeline between the water outlet of the evaporator 12 and the water inlet of the cold water tank 19, and the cold water temperature sensor 18 can detect the temperature of the liquid in the pipeline in real time. A water flow switch 20 is connected to the pipeline between the water outlet of the evaporator 12 and the water inlet of the cold water tank 19, and the water flow switch 20 can automatically disconnect when the water flow is insufficient or there is no water flow, forcing the unit compressor to shut down, and preventing the evaporator from being damaged due to insufficient cooling capacity.

[0028] like Figure 1 As shown, the air intake pipe 15 is connected to a low pressure gauge 7, and the low pressure gauge 7 can detect the pressure in the pipeline in real time.

[0029] like Figure 2 As shown, an air-cooled chiller also includes a controller 9, which is electrically connected to a high-pressure pressure transmitter 10, an electric air valve actuator 24, and an axial flow fan 21, respectively. The controller 9 controls the rotation speed of the axial flow fan 21 and the opening of the electric air valve 23 according to the high-pressure parameters transmitted by the high-pressure pressure transmitter 10, so that the unit can operate reliably around the clock.

[0030] The controller 9 is also electrically connected to the low-pressure pressure transmitter 14, the exhaust temperature sensor 2, the cold water temperature sensor 18, and the water flow switch 20 respectively. The low-pressure pressure transmitter 14, the exhaust temperature sensor 2, the cold water temperature sensor 18, and the water flow switch 20 transmit various parameters to the controller 9. The controller 9 automatically adjusts the speed of the axial flow fan 21 and the opening of the electric air valve according to the detected parameters, and when the pressure parameters are abnormal and reach the warning value, the unit is controlled to shut down for protection, and an alarm signal is issued to improve the safety of the unit operation.

[0031] The working principle of the utility model is as follows: the high-temperature and high-pressure gas discharged from the compressor 1 enters the condenser 22 through the exhaust pipe 3, the high-temperature and high-pressure refrigerant gas condenses and releases heat in the condenser 22 to become a high-temperature and high-pressure refrigerant liquid, the heat released by the condensation of the refrigerant is taken away by the air flowing through the condenser 22, and is discharged into the atmosphere by the condensing fan 21, the high-temperature and high-pressure refrigerant flows in the liquid pipe, the liquid flows to the expansion valve 13 after being filtered by the drying filter 11, and becomes a low-temperature and low-pressure gas-liquid two-phase mixture after being throttled by the expansion valve 13, and the low-temperature and low-pressure gas-liquid two-phase mixture enters the evaporator 12, the refrigerant vaporizes and absorbs heat in the evaporator 12, absorbs heat from the cold water flowing through the evaporator 12, and cools the cold water, the refrigerated water pump 17 provides power to circulate the cold water between the evaporator 12, the cold equipment and the cold water tank 19, and cools the cold water in the cold equipment and the cold water tank 19. After the refrigerant is gasified in the evaporator 12, it flows to the gas-liquid separator 16, and after the gas-liquid separation in the gas-liquid separator 16, it is sucked into the compressor 1 through the suction pipe 15, discharged after pressurization, and enters the next cycle. The unit is designed with high-pressure pressure transmitter 10, low-pressure pressure transmitter 14, exhaust temperature sensor 2, water flow switch 20, etc. on the refrigeration system pipeline and water system pipeline. Various sensors detect the temperature, pressure and water system flow of the unit at all times and transmit them to the controller 9. The controller 9 automatically adjusts according to the detected temperature and pressure signals, and when the pressure parameters are abnormal and reach the warning value and an accident occurs, the unit is shut down or protective operation is performed, and an alarm signal is issued to make the unit safe and reliable. The unit is equipped with a high-pressure gauge 6, a low-pressure gauge 7, a water pressure gauge 8, etc., which can intuitively display the operation of the unit. The unit is designed with an electric air valve 23 and an electric air valve actuator 24. The controller 9 controls the speed of the axial flow fan 21 according to the high pressure condition transmitted back by the high pressure pressure transmitter 10, and controls the opening of the electric air valve 23 through the electric air valve actuator 24, so that the unit can operate reliably around the clock.

[0032] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. An air-cooled chiller, comprising a compressor (1) and a controller (9), characterized in that: The exhaust port of the compressor (1) is connected to the air inlet of the condenser (22) via an exhaust pipe (3); the liquid outlet of the condenser (22) is connected to the liquid inlet of the expansion valve (13) via a liquid pipe (4); the liquid outlet of the expansion valve (13) is connected to the liquid inlet of the evaporator (12) via a pipeline; the air outlet of the evaporator (12) is connected to the air inlet of the gas-liquid separator (16) via a pipeline; and the air outlet of the gas-liquid separator (16) is connected to the air intake of the compressor (1) via an air intake pipe (15); An axial flow fan (21) is arranged at the air outlet of the condenser (22). The axial flow fan (21) can discharge the heated air flowing through the condenser (22) into the atmosphere. An electric air valve (23) is arranged at the air inlet of the condenser (22). The opening, closing and opening degree of the electric air valve (23) can control the air volume flowing through the condenser (22). The electric air valve (23) is connected to an electric air valve actuator (24). The electric air valve actuator (24) can control the opening degree of the electric air valve (23). The liquid pipe (4) is connected to a high-pressure pressure transmitter (10). The controller (9) is electrically connected to the high-pressure pressure transmitter (10), the electric air valve actuator (24) and the axial flow fan (21) respectively. The controller (9) controls the rotation speed of the axial flow fan (21) and the opening degree of the electric air valve (23) according to the high-pressure parameters transmitted by the high-pressure pressure transmitter (10).

2. An air-cooled chiller as claimed in claim 1, characterized in that: The water inlet of the evaporator (12) is connected to the water outlet of the water pump (17) through a pipeline, the water inlet of the water pump (17) is connected to the water outlet of the cold water tank (19) through a pipeline, and the water outlet of the evaporator (12) is connected to the water inlet of the cold water tank (19) through a pipeline.

3. An air-cooled chiller as claimed in claim 2, characterized in that: A water pressure gauge (8) is connected to the pipeline between the water outlet of the evaporator (12) and the water inlet of the cold water tank (19), and the water pressure gauge (8) can detect the pressure of the liquid in the pipeline in real time. A cold water temperature sensor (18) is connected to the pipeline between the water outlet of the evaporator (12) and the water inlet of the cold water tank (19), and the cold water temperature sensor (18) can detect the temperature of the liquid in the pipeline in real time. A water flow switch (20) is connected to the pipeline between the water outlet of the evaporator (12) and the water inlet of the cold water tank (19).

4. An air-cooled chiller as claimed in claim 3, characterized in that: The air intake pipe (15) is connected to a low pressure gauge (7), and the low pressure gauge (7) is capable of detecting the pressure in the pipeline in real time.

5. An air-cooled chiller as claimed in claim 4, characterized in that: The exhaust pipe (3) is connected to a high pressure gauge (6), and the high pressure gauge (6) can detect the pressure in the pipeline in real time.

6. An air-cooled chiller as claimed in claim 5, characterized in that: An exhaust temperature sensor (2) is connected to the exhaust port of the compressor (1), and the exhaust temperature sensor (2) is capable of detecting the temperature of the exhaust port of the compressor (1) in real time.

7. An air-cooled chiller as claimed in claim 6, characterized in that: A low-pressure pressure transmitter (14) is connected to the pipeline between the evaporator (12) and the gas-liquid separator (16).

8. An air-cooled chiller as claimed in claim 7, characterized in that: The liquid pipe (4) is connected to a drying filter (11), and the liquid in the liquid pipe (4) can be filtered when passing through the drying filter (11).

9. An air-cooled chiller as claimed in claim 8, characterized in that: The controller (9) is electrically connected to the low-pressure pressure transmitter (14), the exhaust temperature sensor (2), the cold water temperature sensor (18), and the water flow switch (20), respectively. The low-pressure pressure transmitter (14), the exhaust temperature sensor (2), the cold water temperature sensor (18), and the water flow switch (20) transmit various parameters to the controller (9). The controller (9) automatically adjusts the rotation speed of the axial flow fan and the opening of the electric air valve according to the detected parameters, and controls the unit to stop for protection when the pressure parameter is abnormal and reaches a warning value, and sends an alarm signal to improve the safety of the unit operation.

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