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Variable-frequency water pump control method applicable to variable-frequency heat-pump water heater

A technology of heat pump water heaters and variable frequency water pumps, which is applied to fluid heaters, lighting and heating equipment, etc. It can solve the problems of reduced heat exchange temperature difference between refrigerant and water level, poor energy efficiency of heat pumps, etc., to improve energy efficiency, reduce noise, and improve comfort sexual effect

Active Publication Date: 2019-11-08
GUANGDONG CHIGO HEATING & VENTILATION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the same outlet water temperature, the smaller temperature difference between inlet and outlet water will lead to a smaller average heat exchange temperature difference between refrigerant and water, making the energy efficiency of the heat pump worse

Method used

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  • Variable-frequency water pump control method applicable to variable-frequency heat-pump water heater
  • Variable-frequency water pump control method applicable to variable-frequency heat-pump water heater

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Embodiment Construction

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] See attached figure 1 As shown, in this embodiment, a water heater suitable for frequency conversion heat pumps includes an outdoor heat exchanger 1, a water side heat exchanger 2, a compressor 3, a frequency conversion water pump 4, a flow meter 5, an outlet water temperature sensor 6 and Inlet water temperature sensing probe 7, wherein the refrigerant flow path of the water side heat exchanger 2 is connected with the outdoor heat exchanger 1 and the compressor 3, a...

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Abstract

The invention discloses a variable-frequency water pump control method applicable to a variable-frequency heat-pump water heater. The variable-frequency water pump control method particularly comprises the following stepsofstartingthe dynamic monitoring mode during the stable operation of a heat-pump water heater, and monitoring the water inlet temperature T1, the water outlet temperature T2 and the water flow rate Q at a heat exchanger on the water side in real time in the dynamic monitoring mode, wherein the temperature-difference absolute value delta T between the water inlet temperature T1and the water outlet temperature T2 is calculated and determined only when the water flow rate Q monitored in real time is higher than the predetermined minimum water flow rate Qmin, the temperature-difference absolute value delta T calculated and determined in real time is compared with the upshift temperature value Ta and the downshift temperature value Tb at the current capacity shift of a variable-frequency water pump for judgment, and then the capacity shift of the variable-frequency water pump is correspondingly adjusted based on the judgment result.

Description

technical field [0001] The invention relates to the technical field of air conditioning systems, in particular to a control method for a frequency conversion water pump suitable for a frequency conversion heat pump water heater. Background technique [0002] At present, many heat pump water heaters with frequency conversion function on the market are basically matched with water pumps that can only be adjusted manually, and because of the appearance, these water pumps are usually installed in outdoor units or indoor units. After one adjustment, it is difficult to make corresponding adjustments according to the heat pump capacity. Adjustment. Moreover, the water flow parameter is an extremely important parameter in the operation of the heat pump. Improper adjustment is prone to the following problems in the operation of the heat pump: [0003] 1) When the heat pump is running in cooling mode, too little water flow of the heat pump may cause freezing, blockage or even freezin...

Claims

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Application Information

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IPC IPC(8): F24H9/20
CPCF24H9/2007
Inventor 梁嘉轩文鼎坤刘华栋朱健文
Owner GUANGDONG CHIGO HEATING & VENTILATION EQUIP CO LTD
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