WO2018121588A1 - Refrigerator adopting linear compressor and activation control method thereof - Google Patents

Abstract

A method of controlling a refrigerator adopting a linear compressor. The method comprises: during initial power-up, controlling a linear compressor to operate using preconfigured input power for a preconfigured duration. The preconfigured input power is less than normal activation input power matching a refrigerator volume, and exceeds or is equal to minimum activation power matching the refrigerator volume.

Description

Refrigerator using linear compressor and starting control method thereof

The present application claims the priority of the Chinese patent application entitled "Refrigerator with Linear Compressor and Its Start Control Method" on December 28, 2016, the application number is 201611235337.6, the entire contents of which are incorporated by reference. In this application.

Technical field

The invention relates to the technical field of refrigerator noise reduction, in particular to a refrigerator using a linear compressor and a control method thereof.

Background technique

Linear compressors can guarantee a 10-year design life due to the small number of mechanical parts and even the use of lubricating oil. When the linear compressor is applied to the refrigerator, in the startup phase, because the internal temperature of the cabinet is consistent with the ambient temperature, in order to reach the set temperature as soon as possible, the compressor is usually input with as much power as possible to speed up the cooling. At this time, the compressor is in the worst working condition, the pressure is instantaneously reduced, the displacement of the piston is maximum, the suspension spring at both ends of the compressor is at the maximum amplitude, and the connecting rod connecting the piston and the motor operates in the limit state, causing the linear compressor The reliability is reduced.

Summary of the invention

The object of the present invention is to solve the problem that the working condition of the compressor changes sharply at the moment of starting the refrigerator.

In order to achieve the above object, the present invention provides a refrigerator start control method using a linear compressor, comprising:

Determining whether the refrigerator enters a startup state from a stopped state;

If yes, the startup mode is invoked, and the linear compressor is controlled to run at a preset input power for a preset time; wherein

The preset input power is less than a normal starting input power that matches the volume of the refrigerator, greater than or equal to a minimum starting power that matches the volume of the refrigerator.

As a further improvement of an embodiment of the present invention, the method further includes:

After the preset time is run, the startup mode is exited, and the linear compressor operation is controlled according to the temperature of the refrigerator compartment and the external ambient temperature.

As a further improvement of an embodiment of the present invention, the preset input power is less than the maximum input power of the linear compressor.

As a further improvement of an embodiment of the present invention, the compressor pressure drop slope approaches zero and exits the startup mode.

As a further improvement of an embodiment of the present invention, the preset time is not shorter than the time required for the compressor to start until the pressure drop slope approaches zero.

As a further improvement of an embodiment of the present invention, the preset time is at least ten minutes.

Another aspect of the present invention also provides a refrigerator using a linear compressor, comprising:

a computer board for determining whether the refrigerator enters a startup state from a stopped state, and controls an operation mode of the linear compressor;

If the refrigerator enters the startup state from the stop state, the startup mode is invoked, and the linear compressor is controlled to run at the preset input power for a preset time; wherein

The preset input power is less than a normal starting input power that matches the volume of the refrigerator, greater than or equal to a minimum starting power that matches the volume of the refrigerator.

As a further improvement of an embodiment of the present invention, the refrigerator further includes:

Inter-room temperature sensor for collecting the indoor temperature of the refrigerator;

An ambient temperature sensor for collecting external ambient temperature;

The computer board controls the linear compressor to exit the startup mode after running for a preset time in the startup mode, and controls the linear compressor operation according to the temperature of the refrigerator compartment and the external ambient temperature.

As a further improvement of an embodiment of the present invention, the refrigerator further includes a single chip microcomputer to time the preset time.

As a further improvement of an embodiment of the present invention, the preset time is at least ten minutes.

Compared with the prior art, the present invention provides a linear compressor with as little power as possible when the refrigerator enters the starting state from the stopped state, so that the pressure drop of the refrigerator is gentle at the instant of energization, thereby achieving the purpose of protecting the compressor.

DRAWINGS

1 is a schematic flow chart of a method for starting a refrigerator using a linear compressor according to an embodiment of the present invention;

2 is a diagram showing changes in pressure values of a compressor after being energized in an embodiment of the present invention;

Fig. 3 is a schematic view showing the system of a refrigerator using a linear compressor according to an embodiment of the present invention.

detailed description

The invention will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, the embodiments are not intended to limit the scope of the invention, and the structures, methods, or functional changes made by those skilled in the art in accordance with the embodiments are included in the scope of the present invention.

The invention inputs a linear compressor at the start-up stage with as little power as possible to avoid a sharp pressure drop at the instant of energization of the compressor. Referring to FIG. 1, the startup control method of the present invention includes:

Determining whether the refrigerator enters a startup state from a stopped state;

If yes, the startup mode is invoked to cause the linear compressor to operate at a preset input power for a preset time;

Exit the startup mode.

The stop state refers to the state of the refrigerator when there is no current flowing through the electronics in the refrigerator. For example, before the refrigerator is first powered on.

It can be understood that, in the stopped state, the temperature of the refrigerator compartment and the freezing compartment are the same, and the temperature of the refrigerator compartment may be the same as or similar to the room temperature.

The preset input power should be less than the normal starting input power W1 that matches the volume of the refrigerator, greater than or equal to the minimum starting power W2 that matches the volume of the refrigerator.

The normal starting input power W1 matching the volume of the refrigerator refers to a large power input when the compressor is normally started to rapidly reduce the temperature of the compartment. In some cases, the input power W1 is the maximum power of the linear compressor, causing the linear compressor to work in the limit state.

The minimum starting power W2 that matches the volume of the refrigerator refers to the lowest power that can operate the compressor and cool the compartment.

According to the starting control method of the present invention, the input power at the start of the linear compressor is set to be between W1 and W2, so that the compressor is operated for a period of time under relatively gentle working conditions, thereby achieving the purpose of protecting the compressor. This input power is less than the maximum input power of the compressor.

Referring to Fig. 2, the linear compressor is evacuated after being energized, and the pressure value in the casing is decreased, and finally stabilized at a small pressure value. The conventional control method inputs a large limit power to the compressor, and the pressure inside the compressor suddenly drops. With the start-up control method of the present invention, the pressure drop is relatively gentle.

The preset time needs to be greater than or equal to the time required for the compressor to start from the start to the pressure drop slope approaching zero. During the preset time period, the compressor pressure drop slope decreases from large to large, eventually approaching zero, that is, the pressure is maintained at a stable value.

Preferably, the preset time is ten minutes.

Further, the preset time should not be too long, so as not to affect the speed and time of the refrigerator cooling. After the preset time is run, the startup mode is exited, and the linear compressor operation is controlled according to the indoor temperature of the refrigerator and the external ambient temperature.

Specifically, the indoor temperature of the refrigerator can be used to control the start and stop of the linear compressor. The external ambient temperature can be divided into a plurality of continuous temperature intervals, and the operating parameters of the linear compressor are set corresponding to each temperature interval. When the indoor temperature in the refrigerator is greater than the target temperature and the temperature difference from the target temperature is greater than the preset temperature difference, the linear compressor is correspondingly Run the parameter to run.

Referring to FIG. 3, the present invention also discloses a refrigerator using a linear compressor, comprising:

The computer board 100 is configured to determine whether the refrigerator enters a startup state from a stopped state, and controls an operation mode of the linear compressor;

If yes, the startup mode is called to control the linear compressor to run for a preset time at the preset input power. The preset input power is less than a normal starting input power that matches the volume of the refrigerator, and is greater than or equal to a minimum starting power that matches the volume of the refrigerator.

Among them, the preset time is measured by the single chip microcomputer.

The refrigerator further includes a compartment temperature sensor 200 for collecting the indoor temperature of the refrigerator; and an outdoor ambient temperature sensor 300 for collecting the external ambient temperature.

Further, after the preset time is run, the startup mode is exited, and the linear compressor operation is controlled according to the indoor temperature of the refrigerator and the external ambient temperature.

Specifically, the indoor temperature of the refrigerator can be used to control the start and stop of the linear compressor. The external ambient temperature can be divided into a plurality of continuous temperature intervals, and the operating parameters of the linear compressor are set corresponding to each temperature interval. When the indoor temperature in the refrigerator is greater than the target temperature and the temperature difference from the target temperature is greater than the preset temperature difference, the linear compressor is correspondingly Run the parameter to run.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that Modifications of the technical solutions described in the foregoing embodiments, or equivalents of the technical features of the embodiments of the present invention, are not to be construed as a departure from the spirit and scope of the embodiments of the present invention.

Claims (10)

A refrigerator start control method using a linear compressor, comprising the following steps: Determining whether the refrigerator enters a startup state from a stopped state; If yes, the startup mode is invoked, and the linear compressor is controlled to run at a preset input power for a preset time; wherein The preset input power is less than a normal starting input power that matches the volume of the refrigerator, greater than or equal to a minimum starting power that matches the volume of the refrigerator. The method for controlling the start of a refrigerator using a linear compressor according to claim 1, wherein the method further comprises: After the preset time is run, the startup mode is exited, and the linear compressor operation is controlled according to the indoor temperature of the refrigerator and the external ambient temperature. The refrigerator start control method using a linear compressor according to claim 1, wherein the preset input power is smaller than a maximum input power of the linear compressor. A refrigerator start control method using a linear compressor according to claim 1, wherein the startup mode is exited when the compressor pressure drop slope approaches zero. A refrigerator start control method using a linear compressor according to claim 1, wherein said preset time is not shorter than a time required for the compressor to start until the pressure drop slope approaches zero. A refrigerator start control method using a linear compressor according to claim 1, wherein said preset time is at least ten minutes. A refrigerator using a linear compressor, comprising: a computer board for determining whether the refrigerator enters a startup state from a stopped state, and controls an operation mode of the linear compressor; If the refrigerator enters the startup state from the stop state, the startup mode is invoked, and the linear compressor is controlled to run at the preset input power for a preset time; wherein The preset input power is less than a normal starting input power that matches the volume of the refrigerator, greater than or equal to a minimum starting power that matches the volume of the refrigerator. The refrigerator using a linear compressor according to claim 7, further comprising: Inter-room temperature sensor for collecting the indoor temperature of the refrigerator; An ambient temperature sensor for collecting external ambient temperature; The computer board controls the linear compressor to exit the startup mode after running for a preset time in the startup mode, and controls the linear compressor operation according to the temperature of the refrigerator compartment and the external ambient temperature. A refrigerator using a linear compressor according to claim 7, further comprising a single chip microcomputer for timing the preset time. A refrigerator using a linear compressor according to claim 7, wherein said preset time is at least ten minutes.

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