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Air conditioner defrosting control method and application thereof

A control method and technology for an air conditioner, which are applied in the field of air conditioners, can solve problems such as malfunctions, and achieve the effects of improving efficiency, simplifying circuit structure, and preventing erroneously starting defrosting actions.

Active Publication Date: 2010-10-13
PANASONIC HOME APPLIANCES AIR CONDITIONING GUANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in this control method, when the outdoor temperature is relatively low and the humidity is very low, even if there is no frost or little frost on the outdoor heat exchanger, the operation in the defrosting mode will be performed, that is, a malfunction will occur.

Method used

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  • Air conditioner defrosting control method and application thereof
  • Air conditioner defrosting control method and application thereof
  • Air conditioner defrosting control method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] After the set time M1 (M1 is preset to 30 minutes) elapses after the heating mode starts, the temperature sensor continues to sample the temperature of the indoor heat exchanger at a preset interval time S1 (S1 is preset to 10 seconds).

[0036] Record the temperature of the indoor heat exchanger in this operating interval from the first sampling temperature, and record the highest temperature Tmax as 43℃, and then when the current indoor sensor temperature is less than Tmax a set value T℃ (T℃ is preset as 3℃), enter a new timing stage. From this moment on, the time is recorded as t1, t2, t3...tn, and the corresponding temperature is recorded as T1, T2, T3...Tn, and the indoor heat exchanger is calculated. The rate of temperature decrease Kn.

[0037] When Kn is ≥ 0.4 for three consecutive times and the heating operation time M2 reaches 60 minutes, the main controller will issue a defrost start command and enter the defrost operation phase.

Embodiment 2

[0039] After the set time M1 (M1 is preset to 30 minutes) has elapsed after the heating mode starts, the temperature sensor continues to sample the indoor heat exchanger temperature at a preset interval time S1 (S1 is preset to 10 seconds).

[0040] Record the temperature of the indoor heat exchanger in this operating interval from the first sampling temperature, record the highest temperature Tmax as 40℃, and then when the current indoor sensor temperature is less than Tmax a set value T℃ (T℃ is preset as 3℃), enter a new timing stage. From this moment on, the time is recorded as t1, t2, t3...tn, and the corresponding temperature is recorded as T1, T2, T3...Tn, and the indoor heat exchanger is calculated. The rate of temperature decrease Kn.

[0041] When Kn is greater than or equal to 0.25 for three consecutive times, and the set time M3 (M3 is preset to 60 minutes) from the end of the previous defrost is satisfied, the main controller will issue a defrost start command and enter...

Embodiment 3

[0043] After the set time M1 (M1 is preset to 30 minutes) has elapsed after the heating mode starts, the temperature sensor continues to sample the indoor heat exchanger temperature at a preset interval time S1 (S1 is preset to 10 seconds).

[0044] When the heating operation time M5 reaches 60 minutes, and the compressor continues to operate for the set time M4 (M4 is preset to 10 minutes), the indoor fan speed F is 1200 rpm, and the detected indoor ambient temperature Th is 28°C, according to the indoor heat exchanger temperature Tn≤H(35)+D(0.8)*(the indoor ambient temperature Th-20 at this moment)=43.4°C.

[0045] When the temperature of the indoor heat exchanger is lower than 43.4°C for a set time S3 (S3 is preset to 30 seconds), the main controller will issue a defrost start command and enter the defrost operation phase.

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Abstract

The invention discloses an air conditioner defrosting control method and application thereof. When the air conditioner is in heating operation mode, a temperature sensor on an indoor heat exchanger is utilized to monitor the temperature of the indoor heat exchanger, a main controller receives the detection data and outputs an instruction after analysis, and the defrosting program is controlled to be started. The invention adopts the temperature sensor to monitor the temperature of the indoor heat exchanger and combines the correspondence of the indoor heat exchanger temperature with the outdoor heat exchanger temperature and frosting amount, defrosting start moment can be accurately controlled, defrosting at appropriate moment is realized, and heating operation efficiency is improved, thus putting an end to the condition that the air conditioner incorrectly starts defrosting action, simplifying the circuit structure, reducing production cost and saving production time.

Description

Technical field [0001] The invention relates to the field of air conditioners, in particular to a defrosting control method for an air conditioner and its application. Background technique [0002] Such as figure 1 As shown, the prior art split type air conditioner refrigeration circuit includes a compressor 1, a four-way valve 2, an indoor heat exchanger 4 with an indoor piping temperature sensor 3, a throttle capillary tube 5, and an outdoor piping temperature sensor 7 The outdoor heat exchanger 6 and so on. The current air conditioner defrosting control method, for example, disclosed in Chinese Patent ZL200510117144.6: The temperature sensor on the outdoor heat exchanger is used to judge the frosting condition on the outdoor heat exchanger, and the temperature and the preset outdoor sensor A certain period of time is used as the judgment condition for starting defrost. [0003] However, in this control method, when the outdoor temperature is relatively low and the humidity is ...

Claims

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Application Information

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IPC IPC(8): F24F11/00F24F11/02
Inventor 刘邵玲塔广志童学志
Owner PANASONIC HOME APPLIANCES AIR CONDITIONING GUANGZHOU CO LTD
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