Air conditioner and control method thereof

A control method and air conditioner technology, which is applied in air conditioning systems, heating and ventilation control systems, heating methods, etc., can solve problems such as feeling too cold, increasing indoor throttling noise, and not cooling down, so as to achieve flexible operation and good comfort , a wide range of effects

Active Publication Date: 2011-05-18
MIDEA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2) In humid weather, the ambient temperature is not very high, but the humidity is relatively high. When users use ordinary air conditioners to dehumidify, the temperature drops too much and feels too cold
Some air conditioners on the market operate intermittently, the temperature will not drop too low, but it keeps fluctuating, and the dehumidification effect is not ideal
There are also some air conditioners that install an expansion mechanism indoors to achieve dehumidification without cooling down, but it needs to increase a lot of cost, and there is an increase in indoor throttling noise

Method used

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  • Air conditioner and control method thereof
  • Air conditioner and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0040] The user selects mode one to run.

[0041] The following constants are preset in the air conditioner: flow constant A1=A2=A3=5; number of times B1=20, B2=B3=15; time constant M=3; compressor frequency constant H1=40, H2=80.

[0042] During normal cooling, that is, when controlled according to the existing basic cooling mode, the first sensor measures that when the user uses it, the dry bulb temperature of the indoor environment is T1=27°C, and the wet bulb temperature t1=19°C, and the corresponding dew point temperature is calculated T2 = 14.7°C. According to the indoor air-conditioning load, the flow rate of the electronic expansion valve at this time is 12.5L / min, and the corresponding pulse (or opening) of the electronic expansion valve is 300,

[0043] At this time, the evaporation temperature T3 of the refrigerant in the indoor heat exchanger measured by the second sensor is 13°C. Since the dew point temperature T2 = 14.7°C > evaporation temperature T3 = 13°C, th...

no. 2 example

[0048] The user selects mode two to run.

[0049] When the first sensor measures that the dry bulb temperature of the indoor environment is 23° C. and the wet bulb temperature is 19° C. when the user uses it, the corresponding dew point temperature T2 = 16.9° C. is calculated.

[0050] During conventional dehumidification, that is, when dehumidification is carried out according to the existing basic cooling mode, the frequency of the compressor runs at 60Hz. At this time, the cooling capacity of the air conditioner is about 3000W, and the temperature is greatly reduced while dehumidifying.

[0051] When the user selects mode 2, first limit the frequency of compressor 1 to below H1=40Hz, at this time, the electronic expansion valve pulse of the conventional inverter air conditioner is 150, and the refrigerant in the indoor heat exchanger measured by the second sensor The evaporating temperature T3 = 17°C, the cooling capacity of the air conditioner is 1500W, the cooling capacit...

no. 3 example

[0057] The user selects mode three to run.

[0058] When the first sensor measures that the dry bulb temperature of the indoor environment is 23° C. and the wet bulb temperature is 19° C. when the user uses it, the corresponding dew point temperature T2 = 16.9° C. is calculated.

[0059] When the user selects mode 3, the target frequency of the compressor is changed to H2=80Hz or above. At this time, the electronic expansion valve pulse of the conventional inverter air conditioner is 350, and the evaporation temperature of the refrigerant in the indoor heat exchanger is T3=13°C. The refrigeration capacity of the device is 3800W.

[0060] Since the evaporating temperature T3+4°C=13°C+4°C=17°C > the dew point temperature T2=16.9°C, on the basis of the control of the existing basic refrigeration mode, the flow rate of the throttling device is reduced by A3%=5%, It is judged once after M=3 minutes. This time, the flow rate of the electronic expansion valve is appropriately reduce...

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Abstract

The invention relates to an air conditioner and a control method thereof. The air conditioner comprises a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger, wherein the outdoor heat exchanger and the indoor heat exchanger are selectively communicated with the compressor by virtue of the four-way valve, the throttling device is arranged between the indoor heat exchanger and the outdoor heat exchanger, and the indoor heat exchanger is also provided with a first sensor used for detecting the indoor ambient temperature and humidity and a second sensor used for detecting the evaporating temperature of refrigerant in the indoor heat exchanger. The throttling device is an electronic expansion valve, a thermostatic expansion valve or silicon valve. The control method of the air conditioner comprises the following steps of: regulating the frequency of the compressor according to the refrigeration requirement of a room when refrigeration and dehumidification or temperature reduction and no dehumidification are required by a user to realize temperature stability control; and regulating the flow of the throttling device to be more than the flow required by the conventional refrigeration to increase the evaporating temperature and achieve the aim of no dehumidification or less dehumidification. The invention has the characteristics of flexibility of operation, comfortableness and wide application range.

Description

technical field [0001] The invention relates to an air conditioner, in particular to an air conditioner and a control method thereof. Background technique [0002] Household air conditioners have become popular, and various users have put forward more requirements for the use of air conditioners. A single mode of temperature control can no longer meet the needs of all users. More and more users hope that the humidity can also achieve multiple modes according to the environmental conditions. control. [0003] The current requirements mainly include: 1) When the compressor is turned on during cooling operation in summer, the temperature of the evaporator will generally be lower than the dew point temperature of the air, causing part of the cooling capacity to be used for dehumidification during the operation process, making the relative humidity of the air in the room too high Low, causing discomfort such as dry mouth of the user. Therefore, users hope that the air condition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F1/00F24F11/00
Inventor 张浩李金波李强
Owner MIDEA GRP CO LTD
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