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Environment temperature calculation and compressor rotating speed control method

A compressor speed and control method technology, which is applied to household refrigeration devices, lighting and heating equipment, cooling fluid circulation devices, etc., can solve hysteresis, difficulty in realizing fast intelligent identification of compressor speed adjustment, and lack of intelligent load in the room Judgment and other issues to achieve the effect of reducing manufacturing costs

Active Publication Date: 2022-02-11
四川奥库科技有限公司
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Problems solved by technology

[0004] However, there are defects in the above control rules of frequency conversion refrigerators, which lack the intelligent judgment of the load in the compartment
For example, when the user puts a lot of food in the refrigerator, the above control rules are difficult to achieve fast intelligent identification and quick adjustment of the compressor speed, and the speed can only be readjusted based on the running time and start-up rate of multiple subsequent operating cycles. has a certain hysteresis

Method used

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  • Environment temperature calculation and compressor rotating speed control method

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Embodiment 1

[0020] A method for estimating ambient temperature and controlling the rotational speed of a compressor, specifically comprising the following steps:

[0021] S01: The compressor runs at a fixed speed of P1=1500rpm. If the compressor runs for more than t1=30 minutes and has not stopped, it will increase the speed to P2=2400rpm and run for another 10 minutes before stopping. Afterwards, the refrigerator continues to operate at P2=2400rpm until the refrigerator reaches a stable operating state, that is, the rate of change η of the start-up rate after continuous operation of i=3 refrigeration cycles is less than the coefficient β=0.05. The operating rates are 43%, 42%, and 44%, corresponding to η being 0.0233 and 0.0476.

[0022] S02: According to the operating rate ni=44% of the latest refrigeration cycle, calculate the minimum ambient temperature value Tmin=25°C, and calculate the load rate of the refrigerator compartment m=50% according to the cooling rate of the latest refrig...

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Abstract

The invention discloses an environment temperature calculation and compressor rotating speed control method. The method realizes intelligent calculation of the temperature of the environment where a refrigerator is located and the load in a compartment by using the starting rate and the compartment cooling speed of the refrigerator in a stable operation state, and adjusts the rotating speed of a compressor by using the calculated environment temperature and the load in the compartment to realize energy-saving operation of the refrigerator. According to the method, an environment temperature sensor and related wire harnesses can be omitted, and the refrigerator manufacturing cost is reduced. Intelligent calculation of the environment temperature, intelligent calculation of the chamber load and intelligent control of the rotating speed of the compressor are achieved through the refrigerator starting rate and the chamber cooling speed, and the running rotating speed of the compressor is more suitable for the environment working condition and the load working condition when a user uses the compressor.

Description

technical field [0001] The invention belongs to the technical field of refrigerators, and in particular relates to a method for calculating the ambient temperature and controlling the rotation speed of a compressor. Background technique [0002] On fixed-frequency refrigerators, since the speed of the compressor cannot be adjusted, there is generally only a room temperature sensor designed on fixed-frequency refrigerators to control the start and stop of the refrigerator. On the inverter refrigerator, since the compressor speed can be adjusted, in order to accurately control the compressor speed, an ambient temperature sensor is added on the basis of the compartment temperature sensor. [0003] On the inverter refrigerator, the compressor speed is determined by the ambient temperature sensor value, the room temperature sensor value, and the difference between the user-set temperature value and the room temperature sensor value. Speed ​​operation, and then readjust the speed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D29/00
CPCF25D29/00F25D2600/02Y02B40/00
Inventor 李昱兵刘宏宇
Owner 四川奥库科技有限公司
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