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Automatic precise defrosting control method and device, and heat pump water heater

A control method and defrosting time technology, applied in the field of equipment, automatic and precise defrosting control method, heat pump water heater, can solve the problems that the unit cannot accurately judge the frosting state and unit status, and the defrosting effect is not good, and achieve Avoid long-term harsh operating conditions and low heating capacity, improve user experience, and achieve the effect of precise defrosting costs

Active Publication Date: 2020-10-13
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an automatic and precise defrosting control method, device, and heat pump water heater to solve the problem in the prior art that the unit cannot accurately judge the frosting state and the state of the unit, resulting in poor defrosting effect

Method used

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  • Automatic precise defrosting control method and device, and heat pump water heater
  • Automatic precise defrosting control method and device, and heat pump water heater
  • Automatic precise defrosting control method and device, and heat pump water heater

Examples

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Effect test

Embodiment 1

[0029] figure 1 is a flowchart of a defrosting control method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0030] Step S101, after the unit is turned on, determine whether to perform the first defrosting operation according to the operating parameters of the unit;

[0031] Step S102, after performing the first defrosting operation, the non-defrosting time t 未除霜 timekeeping;

[0032] Step S103, at t 未除霜 When the preset minimum defrosting time is exceeded, the defrosting condition is judged; if the defrosting condition is met, the stable defrosting operation is performed.

[0033] It should be noted that the present invention is applicable to heat pump water heaters with electronic expansion valves as throttling devices and automatic defrosting functions. Based on this embodiment, it is possible to accurately determine the frosting state of the unit, to defrost accurately without increasing costs,...

Embodiment 2

[0042] figure 2 It is a flow chart of defrosting control of a heat pump water heater according to an embodiment of the present invention, such as figure 2 As shown, the process includes the following steps:

[0043] 1. When the unit is turned on, the timer starts counting t 未除霜 and t 累计 , and check t in real time 累计 . when t 累计 greater than the preset t 首次除霜时间 , the crew starts to judge T 盘管 Whether the temperature condition of the first defrosting coil is met, specifically, judge T 盘管 未除霜 .

[0044] 2. After that, enter the non-initial defrosting control program. Unit real-time inspection t 未除霜 Whether it is greater than the preset minimum defrosting time (it can be understood as the defrosting interval time), if not satisfied, re-inspect, when the above conditions are met, start to judge the defrosting conditions:

[0045] 1) Check the number of steps B of the electronic expansion valve. The minimum number of steps of the electronic expansion valve is usually a ...

Embodiment 3

[0051] corresponds to figure 1 In the defrosting control method introduced, this embodiment provides a defrosting control device, such as image 3 The structural block diagram of the defrosting control device shown, the device includes:

[0052] The first defrosting processing module 10 is used to determine whether to perform the first defrosting operation according to the operating parameters of the unit after the unit is turned on;

[0053] Timing module 20, used for accumulating running time t of the compressor 累计 and non-defrosting time t 未除霜 timekeeping;

[0054] The stable defrosting processing module 30 is used for performing the first defrosting operation, at t 未除霜 When the preset minimum defrosting time is exceeded, the defrosting condition is judged; if the defrosting condition is met, the stable defrosting operation is performed.

[0055] Based on this embodiment, it is possible to accurately determine the frosting state of the unit, to defrost accurately witho...

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Abstract

The invention discloses an automatic precise defrosting control method and device, and a heat pump water heater. The automatic precise defrosting control method comprises the steps that after a unit is started, whether the first defrosting operation is performed or not is determined according to operation parameters of the unit; after the first defrosting operation is performed, the non-defrostingtime is timed; when the non-defrosting time exceeds the preset minimum defrosting time, the defrosting condition is judged; and if the defrosting condition is met, the stable defrosting operation isperformed. According to the automatic precise defrosting control method, the frosting state of the unit can be accurately judged, defrosting is accurate, the cost is not increased, and the use experience of a user is improved; and in case of fluorine leakage, the unit cannot defrost, so that the problem of fluorine leakage is directly displayed to customers, fluorine is replenished timely, and theservice life of the unit is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to an automatic and precise defrosting control method and device, and a heat pump water heater. Background technique [0002] At present, due to cost considerations, most heat pump water heaters on the market adopt schemes such as timed defrosting, and start defrosting after meeting the time conditions and certain temperature conditions. This type of scheme will bring problems such as no-frost defrosting and frequent defrosting, and no-frost defrosting will easily lead to high voltage protection. Or, when the heat pump unit is running in the absence of fluorine, even if it is a high ambient temperature (higher ambient temperature), frost is likely to form on the external unit. However, the units on the market will defrost, so customers cannot find out the fluorine leakage fault in time. The long-term operation of the unit in the fluorine-deficient condition until it enters p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/02F24H4/02F25B47/02F25B49/02F25B41/06
CPCF24H4/02F25B30/02F25B47/02F25B49/02Y02B30/70
Inventor 杨硕袁明征吴高灵
Owner GREE ELECTRIC APPLIANCES INC
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