Efficient defrosting method and device implementing control according to fan speed and pressure

A technology of pressure control and fan, applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of unclean defrosting, excessive energy consumption, inaccurate control of defrosting program time points, etc., to avoid defrosting Clean, ensure reasonable and energy-saving, eliminate frost-free defrosting operation and energy loss effect

Active Publication Date: 2016-07-06
QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common air energy heat pump water heaters currently on the market still have the following problems during the defrosting process, such as inaccurate control of the time point of entering and exiting the defrosting program, unclean defrosting, freezing after defrosting, and unit failure during defrosting. Protection, no-frost defrosting, serious energy consumption, etc., there is indeed a need for improvement

Method used

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  • Efficient defrosting method and device implementing control according to fan speed and pressure
  • Efficient defrosting method and device implementing control according to fan speed and pressure
  • Efficient defrosting method and device implementing control according to fan speed and pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A high-efficiency defrosting device combined with fan speed and pressure control, including an evaporator, a reversing valve, a compressor, a condenser, a hot water tank, and a throttling device. The compressor is connected to the evaporator and the evaporator through a reversing valve and pipelines Condenser, the condenser is connected with the hot water tank for heat exchange, the evaporator and the condenser are connected by a pipeline and a throttling device is installed on the pipeline, a fan is installed on the evaporator, and a The outdoor heat exchanger pressure sensor for detecting refrigerant pressure, the first temperature sensor for detecting the outdoor ambient temperature and the second temperature sensor for detecting the temperature of the outdoor heat exchanger, and a processor, the processor communicates with the outdoor heat exchanger The pressure sensor, the first temperature sensor, the second temperature sensor, the reversing valve, the compressor, ...

Embodiment 2

[0035]This method is implemented on the device described in Example 1.

[0036] Such as figure 1 As shown, a high-efficiency defrosting method combined with fan speed and pressure control, during the normal operation of the air energy heat pump water heater, the fan of the outdoor heat exchanger is operating normally at the maximum speed or the highest wind speed, and the outdoor ambient temperature T 环 and judge:

[0037] If T 环 If it is not within the preset frosting ambient temperature range, the hot water heating operation continues; in this embodiment, the preset frosting ambient temperature range is -7°C to 7°C.

[0038] If T 环 In the preset frosting ambient temperature range, when the fan of the outdoor heat exchanger is at the maximum speed or the highest wind speed, the pressure sensor of the outdoor heat exchanger is used to detect the refrigerant pressure P of the outdoor heat exchanger 开 , according to the physical properties of the refrigerant, the correspondi...

Embodiment 3

[0057] The difference between this embodiment and Embodiment 2 is: if T 环 In the preset frosting ambient temperature range, when the fan of the outdoor heat exchanger is at the maximum speed or the highest wind speed, the pressure sensor of the outdoor heat exchanger is used to detect the refrigerant pressure P of the outdoor heat exchanger 开 , according to the physical properties of the refrigerant, the corresponding evaporation temperature T is automatically calculated in real time at this pressure e , calculate T e with T 环 difference T x , to determine the outdoor ambient temperature T at this time 环 The temperature range where it is located, the temperature of the outdoor heat exchanger T th The temperature range where it is located, and determine the frosting temperature range under this condition according to the above conditions, and judge that T x Whether it is in the frosting temperature range, and determine whether the water heater enters the defrosting program...

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PUM

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Abstract

The invention provides an efficient defrosting method and device implementing control according to the fan speed and the pressure. The method comprises the steps of normally operating a fan of an outdoor heat exchanger and detecting the outdoor environment temperature T-environment in the normal water heating process of an air energy heat pump water heater; continuously carrying out water heating if T-environment is not within the preset frosting environment temperature interval; if T-environment is within the preset frosting environment temperature interval, detecting the pressure P-starting of refrigerating fluid of the outdoor heat exchanger, automatically calculating the evaporating temperature Te corresponding to the pressure in real time according to the physical characteristics of the refrigerating fluid, calculating the difference Tx between Te and T-environment, judging whether Tx is within the frosting temperature interval, and repeating the steps from the step of detecting P-starting to the step of judging whether Tx is within the frosting temperature interval if Tx is not within the frosting temperature interval; if Tx is within the frosting temperature interval, enabling the water heater to implement the defrosting program; stopping the defrosting program after defrosting is completed, and restarting the water heating program. A unit can be controlled to start defrosting or stop defrosting more accurately according to the judgment on the basis of the temperature and the pressure.

Description

technical field [0001] The invention relates to a defrosting method and device, in particular to a high-efficiency defrosting method and device combined with fan speed and pressure control, belonging to the field of defrosting air energy heat pump water heaters. Background technique [0002] In winter, the air source heat pump water heater is frosted on the surface of the evaporator, and the thickening of the frost layer causes the air flow to be blocked, which affects the heating capacity of the water heater. Accurate judgment of the degree of frosting and defrosting settings are the primary factors that affect the normal operation of air source heat pump water heaters in low temperature environments. However, the common air energy heat pump water heaters currently on the market still have the following problems during the defrosting process, such as inaccurate control of the time point of entering and exiting the defrosting program, unclean defrosting, freezing after defro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H9/20F25B47/02
Inventor 李博黄娟陈炳泉
Owner QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER
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