Heat pump hot water unit and control method for water flow abnormality of heat pump hot water unit

A control method and technology for heat pump hot water, applied in refrigerators, compressors, refrigeration and liquefaction, etc., can solve problems such as freezing and cracking of heat exchangers, and achieve the effect of preventing freezing and protecting safe operation.

Active Publication Date: 2020-08-14
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that during the defrosting process, the second heat exchanger (water side heat exchanger) produces low-temperature water, and when the water flow is abnormal, when the water temperature is lower than 0°C, it is very easy to cause the heat exchanger to freeze and crack

Method used

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  • Heat pump hot water unit and control method for water flow abnormality of heat pump hot water unit
  • Heat pump hot water unit and control method for water flow abnormality of heat pump hot water unit

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Embodiment Construction

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0024] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or mo...

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PUM

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Abstract

The invention discloses a heat pump hot water unit and a control method for water flow abnormality of the heat pump hot water unit. During unit defrosting running, the water outlet temperature of a second heat exchanger is detected, whether water flow is abnormal or not is judged according to the above temperature difference, and unit running is controlled. According to the range where the temperature difference is located, unit running is controlled, judgment is conducted in combination with the environment temperature situation, and unit running is controlled. Through the above control manner, whether water flow of the hot water unit is abnormal or not and whether the freezing risk happens or not can be effectively judged, unit freezing is prevented, and safety running of the unit is guaranteed.

Description

technical field [0001] The invention belongs to the field of heating, and in particular relates to a heat pump water heater unit and a method for controlling abnormal water flow thereof. Background technique [0002] The heat pump hot water unit absorbs the low-temperature heat source in the air. Whether it is cold winter, night, or rainy, snowy and other bad weather, it can provide hot water for daily life 24 hours a year, and can be connected to heating in winter The heating operation can be carried out with radiators or floor heating to meet the requirements of all-weather operation. [0003] During the defrosting process of the heat pump unit, the four-way valve can be used to switch the flow direction of the refrigerant (refrigerant) to achieve defrosting, but at this time, the water-side heat exchanger has a short-term cooling water process. When the user's water pump fails or the water flow in the water system pipeline fluctuates during the defrosting process of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00
CPCF25B13/00F25B2313/0314
Inventor 罗建飞曾奕郭庆唐于淞郭旭
Owner GREE ELECTRIC APPLIANCES INC
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