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Air conditioner low-temperature heating starting control method, storage medium and air conditioner

A control method and air conditioner technology, applied in space heating and ventilation, heating methods, heating and ventilation control systems, etc., can solve problems such as poor user experience, oil shortage of compressors, and slow temperature rise of motors, etc., to achieve Good user experience, reduced oil discharge rate, and improved operational reliability

Active Publication Date: 2021-08-03
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At night, especially in winter, the outdoor temperature will be very low, and most of the refrigerant in the air conditioner will migrate to the heat exchanger and compressor of the outdoor unit with a relatively low temperature. The liquid refrigerant needs to rely on the heat generated by the compressor to evaporate. The temperature rise of the motor will be slow in the system, the internal unit will take a long time to prevent cold wind, the heat exchanger will take a long time to rise to a high temperature state, and the user experience will be poor.
[0004] For example, during the low-temperature heating start-up process, the air conditioner usually operates at a fixed compressor frequency according to the outer ring temperature. It usually needs more than ten minutes of low-frequency operation to generate effective exhaust superheat and start to increase the frequency, which seriously affects the user's use effect; if the frequency increase is too fast, the oil discharge rate will increase, which will easily cause short circuit of the compressor. Lack of oil for a long time will affect the reliability of the compressor

Method used

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  • Air conditioner low-temperature heating starting control method, storage medium and air conditioner
  • Air conditioner low-temperature heating starting control method, storage medium and air conditioner
  • Air conditioner low-temperature heating starting control method, storage medium and air conditioner

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This application proposes a low-temperature heating start-up control method for an air conditioner, such as figure 1 shown, including the following steps:

[0028] S1. Obtain and judge the outdoor environment T ao Is it less than the first preset temperature T 1 .

[0029] Read the outdoor temperature sensor to obtain the outdoor ambient temperature T ao , according to the outdoor ambient temperature T ao Judging whether it is lower than the first preset temperature T 1 ; If lower than the first preset temperature T 1 , indicating that the liquid refrigerant has migrated to the outdoor heat exchanger and compressor with a relatively low temperature, and the evaporation and gasification of these migrated refrigerants requires rapid heating of the compressor. If greater than or equal to the first preset temperature T 1 , it means that the temperature is within the acceptable range when the air conditioner is started, and the normal operation of the air conditioner ...

Embodiment 2

[0035] After the low-temperature heating is started, especially after running for a period of time, the compressor of the air conditioner itself has a high temperature; when it is turned off and restarted, the operating condition of the air conditioner can run normally. It will affect the heating effect of the air conditioner, and the user experience is not good. In order to avoid interference to the normal operation of the air conditioner, the applicant improved and optimized the above control method.

[0036] Such as figure 2 As shown, a low-temperature heating start-up control method for an air conditioner includes the following steps:

[0037] S1. Obtain and judge the outdoor environment T ao Is it less than the first preset temperature T 1 ; If yes, go to step S2; if not, control the air conditioner to run normally.

[0038] The air conditioner reads the outdoor temperature sensor and obtains the outdoor ambient temperature T ao , to determine the outdoor ambient te...

Embodiment 3

[0047] In order to further ensure the user's comfort and at the same time ensure the operational reliability of the unit, the applicant optimized the above control method. Such as image 3 As shown, a low-temperature heating start-up control method for an air conditioner includes the following steps:

[0048] S1, start up, the compressor runs at the preset frequency f 2 Run the fourth preset duration t 4 ; where f 2 ≥ f 0 , where f 0 is the minimum operating frequency of the compressor.

[0049] Compressor at higher than f 0 The preset frequency f 2 During operation, it is easy to generate sufficient pressure difference between high and low pressure, which can push the four-way valve to change direction; the preset frequency f 2 30-100HZ, such as 30HZ, 40HZ, 50HZ, etc., the lower preset frequency f 2 The generated high and low pressure difference is also small, and the air flow noise generated by the four-way valve reversing is also within an acceptable range. As an ...

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Abstract

The invention provides an air conditioner low-temperature heating starting control method, an air conditioner and a storage medium. The air conditioner low-temperature heating starting control method comprises the steps that whether the outdoor environment temperature Tao is smaller than a first preset temperature T1 or not is obtained and judged; and if yes, a four-way valve of the air conditioner is controlled to conduct frequent switching with the preset duration t0 as a switching period. By frequently switching the four-way valve, a high-temperature and high-pressure gaseous refrigerant returns to a low-pressure side to enter a compressor, so that the temperature of the compressor is quickly increased; and meanwhile, lubricating oil mixed in the refrigerant quickly returns to the compressor, the oil discharge rate is reduced, and the operation reliability of the compressor is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner low temperature heating start control method, an air conditioner and a storage medium. Background technique [0002] With the development of social economy, users have higher and higher requirements for living environment. Among them, the ambient temperature is an environmental condition that users can quickly perceive, and it has become one of the environmental conditions that users focus on. In order to meet the user's requirements for the ambient temperature, temperature control equipment, such as air conditioners, has approached thousands of households. [0003] Heating is one of the necessary functions of air conditioners, but current temperature control equipment still has many problems in heating. For example, how to ensure the normal operation of air conditioners in a wide temperature range is very important. At night, especially in winter, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/30F24F11/61F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F24F110/12
CPCF24F11/30F24F11/61F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F24F2110/12
Inventor 刘永超
Owner NINGBO AUX ELECTRIC
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