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Control method of water chiller unit

A control method and technology for chillers, applied in heating and ventilation control systems, control inputs involving air characteristics, space heating and ventilation control inputs, etc. To achieve energy-saving effects and other issues, to achieve the effect of improving user experience, precise control, and small fluctuations in water temperature

Active Publication Date: 2017-08-18
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +1
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AI Technical Summary

Problems solved by technology

[0003] The air-cooled natural cooling units currently on the market mainly rely on a single ambient temperature condition to select the operating mode and perform mode conversion, which has the problem of inaccurate control, and the utilization rate of the natural cooling waterway is not high, so it cannot achieve better energy saving effect

Method used

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  • Control method of water chiller unit
  • Control method of water chiller unit
  • Control method of water chiller unit

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Embodiment Construction

[0066] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0067] This embodiment proposes a chiller control method, the chiller mainly includes a compressor 1, a condenser 2, a condensing fan 3, an evaporator 4, a natural cooling coil 5 arranged on one side of the condenser 2, a water inlet pipe 6, The water outlet pipe 7; the water inlet pipe 6 is connected to the water inlet of the evaporator 4 through the first control valve V1; the water inlet pipe 6 is connected to the water inlet of the natural cooling coil 5 through the second control valve V2, and the water outlet of the natural cooling coil 5 is connected to the evaporator The water inlet of the device 4; the water outlet of the evaporator 4 is connected to the water outlet pipe 7, see figure 1 shown.

[0068] The first control valve V1 and the ...

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Abstract

The invention discloses a control method of a water chiller unit. The control method is characterized in that the unit is started while Tewo is more than the sum of Tewo<d>+Td, and a running mode is selected to enter; if Tao is more than Tewo<d>-K1 and a compressor is free from fault, the unit enters a refrigerating mode; if Tao is not less than Tao<d> and is less than Tewo<d>-K1 and the compressor is free from fault, the unit enters a refrigerating and natural chilling mode; if Tao is not greater than Tao<d>-K2 or the compressor is of fault, the unit enters a complete natural chilling mode. According to the control method of the water chiller unit, the relationship among the water draining temperature Tewo, the environmental temperature Tao and the return difference temperature Td is determined, and then the running mode is selected to enter, so that the unit can be accurately controlled; the water temperature fluctuation is small, and natural chilling can be completely carried out, and as a result, the requirement of a user on water temperature can be met while energy is saved, and the use experience of the user can be improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a method for controlling a chiller. Background technique [0002] Because of its energy saving and cleanness, the natural cooling method is widely used in air-conditioning and refrigeration technology, especially in air-conditioning that requires year-round cooling. [0003] The air-cooled natural cooling units currently on the market mainly rely on a single ambient temperature condition to select the operating mode and perform mode conversion, which has the problem of inaccurate control, and the utilization rate of the natural cooling waterway is not high, so it cannot achieve a better performance. energy saving effect. Contents of the invention [0004] The invention provides a method for controlling a water chiller, which has precise control and small fluctuations in water temperature. [0005] In order to solve the problems of the technologies describ...

Claims

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Application Information

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IPC IPC(8): F24F11/00
CPCF24F11/30F24F11/64F24F11/65F24F11/70F24F11/77F24F2110/00F24F2140/20Y02B30/70
Inventor 贺雪飞沈太初胡乐举陶慧汇时斌
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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