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Anti-freezing control method and system for heat pump unit

A heat pump unit and control system technology, applied in heating and ventilation control systems, heating and ventilation safety systems, mechanical equipment, etc., can solve problems such as shell tube freezing and cracking

Pending Publication Date: 2019-01-29
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide an antifreeze control method and system for a heat pump unit in view of the fact that the existing antifreeze control device cannot well solve the problem of cracking of the shell tube during the defrosting process of the unit

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  • Anti-freezing control method and system for heat pump unit
  • Anti-freezing control method and system for heat pump unit
  • Anti-freezing control method and system for heat pump unit

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Embodiment Construction

[0072] In order to make the purpose, technical solution and advantages of the present application clearer, the antifreeze control method and system of the heat pump unit of the present application will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0073] See figure 1 , An embodiment of the present application provides a method for controlling antifreeze of a heat pump unit. The antifreeze control method for the heat pump unit is used in the antifreeze control system 200 for the heat pump unit. The antifreeze control method of the heat pump unit includes:

[0074] S10, the water flow detection device 10 detects the current water flow value.

[0075] In step S10 , the water flow detection device 10 . For example, during use, the water flow detection ...

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Abstract

The invention relates to an anti-freezing control method and system for a heat pump unit. The system comprises a water flow detection device and an anti-freezing control device. The water flow detection device is used for detecting the current water flow value. The anti-freezing control device judges whether the current water flow value is smaller than a water flow safety threshold value or not. If the current water flow value is smaller than the water flow safety threshold value, the anti-freezing control device controls a heat pump unit to enter an anti-freezing protection mode, and the heatpump unit is stopped. If the current water flow value is larger than or equal to the water flow safety threshold value, the anti-freezing control device controls the normal operation of the heat pumpunit. According to the relation between the current water flow value and the water flow safety threshold value, the frost cracking condition of the whole pipeline of a water outlet pipe is judged, and the operation stability and reliability of the heat pump unit are improved.

Description

technical field [0001] The present application relates to the field of heat pump units, and in particular, to a method and system for antifreeze control of heat pump units. Background technique [0002] When the traditional heat pump unit realizes antifreeze control in winter, the antifreeze temperature sensor is used to detect the temperature value change of the water flow. When the detection value of the antifreeze temperature sensor is lower than the antifreeze entry set value of the control logic, the heat pump unit enters the antifreeze control. [0003] Using the traditional solution to realize antifreeze control will have the hysteresis and inaccuracy of temperature detection. The antifreeze temperature sensor can only detect the comprehensive temperature of the entire shell and tube water flow at a certain time point, and cannot detect the temperature of each area. When using the traditional solution to realize antifreeze control, it is possible that the temperatur...

Claims

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Application Information

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IPC IPC(8): F24F11/32F24F11/64F24F11/65F24F140/12
CPCF24F11/32F24F11/64F24F11/65F24F2140/12
Inventor 张龙爱王传华魏峰代园
Owner GREE ELECTRIC APPLIANCES INC
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