CN115325767A - Refrigerator and starting method and device of constant-frequency compressor of refrigerator - Google Patents

Refrigerator and starting method and device of constant-frequency compressor of refrigerator Download PDF

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Publication number
CN115325767A
CN115325767A CN202110506895.6A CN202110506895A CN115325767A CN 115325767 A CN115325767 A CN 115325767A CN 202110506895 A CN202110506895 A CN 202110506895A CN 115325767 A CN115325767 A CN 115325767A
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China
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frequency
refrigerator
fixed
moment
compressor
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CN202110506895.6A
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CN115325767B (en
Inventor
陈新杰
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Anhui Meizhi Compressor Co Ltd
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Anhui Meizhi Compressor Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/01—Timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00—Insulation
    • F25D2201/30—Insulation with respect to sound

Abstract

The application belongs to the field of refrigerators, and provides a refrigerator and a method and a device for starting a fixed-frequency compressor of the refrigerator, wherein the method comprises the following steps: controlling a fixed-frequency compressor of the refrigerator to operate according to a first rotating frequency in an open-loop control mode at a first moment when the refrigerator is started; increase through the mode of open loop control the rotational frequency of fixed frequency compressor, control the rotational frequency of the fixed frequency compressor of refrigerator is the second rotational frequency at the second moment, the second moment is after first moment and through the moment of first predetermined duration, the second rotational frequency does rotational frequency and first rotational frequency during refrigerator normal operating condition are less than the second rotational frequency. Therefore, the pressure change speed of the refrigeration system is reduced, and the noise generated by the flow of the refrigerant in the refrigeration system of the refrigerator is reduced.

Description

Refrigerator and starting method and device of constant-frequency compressor of refrigerator
Technical Field
The application belongs to the field of refrigerators, and particularly relates to a refrigerator and a starting method and device of a constant-frequency compressor of the refrigerator.
Background
Refrigerators play an increasingly important role in daily life as indispensable home appliances in modern life. The performance of the refrigerator is more and more concerned by people, especially the noise performance of the refrigerator, and the requirement of consumers is higher and higher.
The constant speed compressor of the refrigerator, which usually reaches a high speed at the moment of starting, causes a rapid change in the pressure of the refrigeration system, which may cause noise in the flow of the refrigerant in the refrigerator system. For people who are sensitive to noise, such as the elderly and children, the noise generated by the refrigerator makes them uncomfortable. Especially during the night break period, excessive noise can seriously disturb the user to take a break.
In order to solve the problem of noise caused by the fixed-frequency compressor at the moment of starting, the related art proposes to improve the starting noise by improving the internal structure of the compressor, such as a silencer structure, an inner exhaust pipe added with a silencing bag, and the like, but the starting noise problem of the fixed-frequency compressor is still more prominent.
Disclosure of Invention
In view of this, the embodiment of the present application provides a refrigerator and a method and an apparatus for starting a constant-frequency compressor thereof, so as to solve the problem that the starting noise of the constant-frequency compressor is relatively large when the refrigerator in the prior art is started.
A first aspect of an embodiment of the present application provides a method for starting a fixed-frequency compressor of a refrigerator, the method including:
controlling a fixed-frequency compressor of the refrigerator to operate according to a first rotating frequency in an open-loop control mode at a first moment when the refrigerator is started;
increase through the mode of open loop control the rotational frequency of fixed frequency compressor, control the rotational frequency of the fixed frequency compressor of refrigerator is the second rotational frequency at the second moment, the second moment is after first moment and through the moment of first predetermined duration, the second rotational frequency does rotational frequency and first rotational frequency during refrigerator normal operating condition are less than the second rotational frequency.
With reference to the first aspect, in a first possible implementation manner of the first aspect, controlling the rotation frequency of the fixed-frequency compressor of the refrigerator to be the second rotation frequency at the second time includes:
after the first time, the fixed-frequency compressor of the refrigerator is controlled to gradually increase from the first rotating frequency to the second rotating frequency according to the increasing rate of the preset rotating frequency.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the increase rate is a fixed value, or the increase rate is a variable that gradually increases.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, when the increase rate is a fixed value, the increase rate is 1 to 3Hz/s.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, controlling the rotation frequency of the fixed-frequency compressor of the refrigerator to be the second rotation frequency at the second time includes:
after a first time, controlling a fixed-frequency compressor of the refrigerator to operate at a first rotating frequency for the first preset time;
and at the second moment, controlling the rotation frequency of a fixed-frequency compressor of the refrigerator, and switching from the first rotation frequency to the second rotation frequency.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the controlling a rotation frequency of a fixed-frequency compressor of the refrigerator to be a second rotation frequency at a second time includes:
after the first moment, controlling a fixed-frequency compressor of the refrigerator to operate for a second preset time to a third moment according to the first rotating frequency;
and controlling the rotating frequency of the fixed-frequency compressor of the refrigerator to gradually increase to a second rotating frequency for a third preset time period after the third time, wherein the first preset time period comprises a second preset time period and a third preset time period.
With reference to the first aspect, the fourth possible implementation manner of the first aspect, and the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the first predetermined time period is 30 seconds to 60 seconds.
With reference to the first aspect, the first possible implementation manner of the first aspect, the second possible implementation manner of the first aspect, the third possible implementation manner of the first aspect, the fourth possible implementation manner of the first aspect, or the fifth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, a ratio of the first rotation frequency to the second rotation frequency is greater than or equal to 1/2 and less than or equal to 2/3.
A second aspect of an embodiment of the present application provides a starting apparatus of a fixed-frequency compressor of a refrigerator, the apparatus including:
the first open-loop control unit is used for controlling a fixed-frequency compressor of the refrigerator to operate according to a first rotating frequency in an open-loop control mode at a first moment when the refrigerator is started;
and the second open-loop control unit is used for increasing the rotating frequency of the fixed-frequency compressor through an open-loop control mode, controlling the rotating frequency of the fixed-frequency compressor of the refrigerator to be the second rotating frequency at the second moment, the second moment is the moment after the first moment and after the first preset time, and the second rotating frequency is the rotating frequency during the normal running state of the refrigerator and the first rotating frequency is less than the second rotating frequency.
A third aspect of embodiments of the present application provides a refrigerator, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of the first aspect when executing the computer program.
A fourth aspect of embodiments of the present application provides a computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the steps of the method according to any one of the first aspects.
Compared with the prior art, the embodiment of the application has the beneficial effects that: when the refrigerator is started, open-loop control is performed on a fixed-frequency compressor of the refrigerator, the fixed-frequency compressor runs according to a first rotating frequency at a first starting moment, and the rotating frequency is increased in an open-loop control mode at a second moment after the first moment for a first preset time length, so that the rotating frequency of the compressor of the refrigerator is a second rotating frequency which is greater than the first rotating frequency, the pressure change speed of a refrigerating system is reduced, and noise generated by the flowing of a refrigerant in the refrigerating system of the refrigerator is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic flow chart illustrating an implementation process of a starting method of a fixed-frequency compressor of a refrigerator according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a starting frequency curve of a compressor according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a starting frequency curve of another compressor provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of a starting frequency curve of another compressor provided in an embodiment of the present application;
FIG. 5 is a schematic diagram of a starting frequency curve of yet another compressor provided in an embodiment of the present application;
FIG. 6 is a schematic diagram of a starting device of a fixed-frequency compressor of a refrigerator according to an embodiment of the present disclosure;
fig. 7 is a schematic view of a refrigerator provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical means described in the present application, the following description will be given by way of specific examples.
When the refrigerator is started, the rotating speed is high during starting, so that the pressure of the refrigerating system is rapidly changed, and the refrigerant in the refrigerator system flows to generate noise. In order to solve the problem of noise generated when the refrigerator is started, it is proposed to improve the starting noise by improving the internal structure of the compressor, such as the structure of a silencer and the structure of an inner exhaust pipe added with a silencing bag, but the improvement effect is not ideal,
the refrigerator comprises a fixed frequency refrigerator and a variable frequency refrigerator. Wherein, the inverter compressor of the inverter refrigerator comprises an inverter motor. The variable frequency motor comprises a Hall-free direct current brushless motor and a Hall-free direct current brushless motor. Compared with a Hall direct current brushless motor, the Hall-free direct current brushless motor has smaller volume and lower cost, and the number of the motor leads is changed from 8 to 3, so that the wiring debugging is simplified. In addition, the hall sensor is easily affected by external environments such as temperature, magnetic field and the like, and in many occasions, the hall-free brushless direct current motor is gradually replacing the hall-free brushless direct current motor.
When the Hall-free brushless DC motor is started and controlled, because the counter electromotive force of the stator winding of the brushless DC motor is in direct proportion to the rotating speed of the motor, when the motor is static, the counter electromotive force is zero, or when the motor is in a low-speed running state, the counter electromotive force is very small, and the position of a magnetic pole of a rotor can not be determined according to a counter electromotive force signal at the moment. Therefore, the back electromotive force method needs to adopt a special starting technology, and the brushless direct current motor is switched to the running state after the acceleration is started from the standstill until the rotating speed is large enough and the zero crossing is detected through the back electromotive force. This process is called "three-stage" start, and mainly includes three stages of rotor pre-positioning, acceleration and operation state switching. Therefore, the motor can be controlled in steering, switching can be carried out after the motor reaches a certain rotating speed, and starting reliability is guaranteed. However, the control process is complex, and when the variable frequency motor is started and controlled, a specific data sampling device needs to be set for data acquisition, which is not beneficial to reducing the cost of the motor. In addition, in the starting process of the variable frequency motor, the zero crossing point detection precision is not high, and the jitter may be caused.
In order to solve the above problem, an embodiment of the present application provides a method for starting a fixed-frequency compressor of a refrigerator, as shown in fig. 1, the method includes:
in S101, at a first time when the refrigerator is started, a fixed-frequency compressor of the refrigerator is controlled to operate at a first rotation frequency by an open-loop control manner.
The refrigerator according to the embodiment of the present application may also be referred to as a fixed-frequency compressor refrigerator, where the compressor is a fixed-frequency compressor. In the fixed-frequency compressor described in the embodiment of the present application, a fixed-frequency motor is provided. The rotation frequency of the fixed-frequency motor during starting is in direct proportion to the voltage frequency input into the fixed-frequency motor. The fixed frequency motor may be an asynchronous motor.
The first moment is the moment when the constant-frequency compressor refrigerator is started. The first time can be the time when the constant-frequency compressor refrigerator is powered on, or the time when the constant-frequency compressor refrigerator detects that the temperature is higher than a preset temperature value and the refrigerator enters the working state again.
The open-loop control mode in the embodiment of the application is different from the closed-loop control mode of the inverter compressor. The open-loop control mode in the embodiment of the application means that the position and the rotating speed of a rotor of an inverter motor do not need to be detected in the starting process of the inverter motor of the inverter compressor. When the change of the rotating speed of the fixed-frequency motor is controlled, only the voltage frequency output by the frequency converter needs to be adjusted. When the inverter motor of the inverter compressor refrigerator is started, the position of the rotor of the inverter motor and the rotation speed of the rotor of the inverter motor need to be detected, and the pulse width or the frequency of the output voltage of the inverter is adjusted according to the detected position of the rotor of the inverter motor and the rotation speed of the rotor of the inverter motor, so that the starting control of the inverter motor is realized.
At the first moment of the starting moment of the constant-frequency compressor refrigerator, the constant-frequency compressor refrigerator can rotate according to the first rotating frequency in a mode of controlling the frequency converter to output voltage with preset frequency.
The fixed-frequency compressor can comprise a second rotating frequency for normal operation and other operating frequencies which are less than the second rotating frequency.
And the second rotating frequency is the rotating frequency of a fixed-frequency motor in the fixed-frequency compressor when the refrigerator with the fixed-frequency compressor operates under the standard working condition. Typically, the second rotational frequency is 50Hz or 60Hz.
The first rotational frequency may be determined based on a second rotational frequency of a standard operating condition when the first rotational frequency is set. For example, the first rotation frequency may be greater than or equal to half of the second rotation frequency and less than or equal to 2/3 of the second rotation frequency, for example, may be 7/12 of the second rotation frequency. According to the determined first rotating frequency, when the fixed-frequency compressor refrigerator starts the fixed-frequency motor in the range, the change speed of the system pressure of the fixed-frequency motor is low, and the noise caused by the flowing of the refrigerant in the refrigerator system can be effectively reduced. And according to the value of the set first rotating frequency, the starting efficiency of the refrigerator with the fixed-frequency compressor can be ensured while the noise generated by the pressure change speed of the compressor is small, so that the refrigerator with the fixed-frequency compressor can be quickly and efficiently returned to the set temperature state while the noise generated by the refrigerant is greatly reduced in a short time.
For example, the second rotation frequency of the fixed frequency motor of the fixed frequency compressor is 50Hz, the first rotation frequency may be set to a frequency range greater than or equal to 25Hz and less than 34Hz, and the magnitude of the first rotation frequency may be set to a value such as 25Hz, 26Hz, 27Hz, 28Hz, 29Hz, 30Hz, 31Hz, 32Hz, or 33 Hz.
In a possible implementation manner, the first rotation frequency may also be determined by combining a difference value between a current actual temperature and a target temperature of the refrigerator. When the difference between the current actual temperature and the target temperature of the refrigerator is large, for example, larger than a preset temperature threshold, the rotation frequency with large data can be selected as the first rotation frequency in the rotation frequency range. When the difference between the current actual temperature and the target temperature of the refrigerator is small, for example, smaller than a preset temperature threshold, the rotation frequency with smaller data can be selected as the first rotation frequency in the rotation frequency range. The value of the first rotational frequency can be determined according to the preset corresponding relationship between the temperature difference and the rotational frequency, so that the temperature recovery time and the noise can be balanced more reliably.
In a possible implementation, the first rotation frequency may be determined in combination with the current time. The rotation frequency of the first range of values may be selected if the current time is in a user's rest period, and the rotation frequency of the second range of values may be selected when the user is in a non-rest period. The values in the first numerical range are all smaller than the values in the second numerical range, and the first numerical range and the second numerical range both belong to the set numerical range of the first rotation frequency, such as being greater than or equal to 1/2 of the second rotation frequency and being less than or equal to 2/3 of the second rotation frequency.
The rest time period of the user and the non-rest time period of the user can be determined by receiving the setting information of the user. When the setting information of the user is not received, default setting information of the system can be set. The default set information of the system can be obtained according to the statistics of the use habit data of the user. And determining the periods such as the night falling asleep time, the afternoon nap time and the like of the user obtained by statistics as rest periods.
In S102, the rotating frequency of the fixed-frequency compressor is increased in an open-loop control mode, the rotating frequency of the fixed-frequency compressor of the refrigerator is controlled to be the second rotating frequency at the second moment, the second moment is the moment after the first moment and after the first preset duration, and the second rotating frequency is the rotating frequency in the normal running state of the refrigerator and the first rotating frequency is smaller than the second rotating frequency.
In the embodiment of the application, after the refrigerator with the fixed-frequency compressor is started through the first rotating frequency at the first moment, at the second moment after the refrigerator runs for the first preset time, the rotating frequency of the fixed-frequency compressor is increased to the second rotating frequency, namely the rotating frequency corresponding to the normal working of the fixed-frequency compressor.
In the embodiment of the present application, the first predetermined time period may be any time period between 30 seconds and 60 seconds. The corresponding first preset duration can be determined according to different rotation speed control modes.
The control manner of the fixed frequency motor in the fixed frequency compressor increasing from the first rotation frequency at the first time to the second rotation frequency at the second time may include various manners, and the following description is given by way of example.
The first method is as follows:
as shown in the schematic diagram of the curve of the rotation frequency of the fixed frequency motor start shown in fig. 2, after the fixed frequency motor of the fixed frequency compressor refrigerator operates at the first rotation frequency for the first predetermined time period t1, the fixed frequency motor operates at the second rotation frequency at the second time.
Since the fixed frequency motor operates at the first rotation frequency for the first predetermined time period t1, the value of the first predetermined time period may be selected according to the magnitude of the first rotation frequency. For example, the first predetermined time period may be longer when the first rotation frequency is smaller, and the first predetermined time period may be larger when the first rotation frequency is larger.
For example, the first predetermined time period may be selected to be 60 seconds when the first rotation frequency is 25, 50 seconds when the first rotation frequency is 29, and 40 seconds when the first rotation frequency is 33. The first predetermined duration may be determined according to a predetermined correspondence.
By setting the corresponding relation between the first rotating frequency and the first preset time length, the refrigerator can be recovered to the set temperature in a smaller noise state and higher efficiency when running in a mode.
The second method comprises the following steps:
as shown in the schematic diagram of the curve of the rotation frequency of the start of the fixed frequency motor in fig. 3, at the first moment of the start moment of the fixed frequency compressor, the rotation frequency of the fixed frequency motor is the first rotation frequency. After the first moment, the fixed-frequency compressor of the refrigerator is controlled to be gradually increased from the first rotating frequency to the second rotating frequency through a preset first preset time period t1 according to the preset increasing rate of the rotating frequency with a fixed value.
The rate of increase of the rotational frequency, i.e. the increase of the rotational frequency per unit time. For example, the rate of increase of the rotational frequency may be 1-3Hz/s. When the increasing rate of the rotating frequency is 1Hz/s and the first rotating frequency is 25, the increasing value of the rotating frequency is 1 when the time of the rotating frequency is 1 second, namely the first rotating frequency is changed to 26 seconds after the starting time is 1 second.
After the increasing rate of the rotating frequency is determined, the first preset time length can be adjusted according to the first predetermined rotating frequency, so that the rotating frequency of the fixed-frequency compressor or the fixed-frequency motor reaches the second rotating frequency after the fixed-frequency motor passes through the first preset time length.
Or, in a possible implementation manner, the magnitude of the first rotation frequency may be adjusted according to the determined increase rate of the rotation frequency and the magnitude of the preset first preset time period.
In the second mode, the rotating frequency of the fixed-frequency compressor or the fixed-frequency motor is increased to the second rotating frequency in a balanced manner by uniformly increasing the rotating frequency, so that the efficiency of recovering to the set temperature is effectively improved while the refrigerant flowing noise of the motor is reduced.
The third method comprises the following steps:
as shown in fig. 4, the rotation frequency curve of the start of the fixed frequency motor is a first rotation frequency at a first moment of the start moment of the fixed frequency compressor. After the first moment, the fixed-frequency compressor of the refrigerator is controlled to be gradually increased from the first rotating frequency to the second rotating frequency within a first preset time period t1 according to the preset increasing rate of the gradually increased rotating frequency.
The increase rate of the rotational frequency in the third mode is gradually increased as compared with the second mode. That is, after the refrigerator is opened, the rotation speed of the constant frequency motor of the refrigerator is gradually increased, and the increase is increased more and more. For example, the first second after the constant frequency refrigerator is turned on may be increased by 1Hz, the second after the refrigerator is turned on may be increased by 1.1Hz, the third second after the refrigerator is turned on may be increased by 1.3Hz, and so on.
Wherein, the range of the increasing rate of the gradually increasing rotation frequency may be 1-3Hz. The rate of increase may be adjusted according to the first rotational frequency for a first predetermined time period.
By setting the increasing rate to be gradually increased, the system refrigerant can effectively adapt to pressure change at the initial starting stage of the refrigerator, and the pressure change speed of the system is increased after the system adapts to the pressure change, so that the flowing noise of the refrigerant is reduced, and the refrigerator can be quickly restored to the set temperature.
The method four comprises the following steps:
as shown in fig. 5, the rotation frequency curve of the start of the fixed frequency motor is a first rotation frequency at a first moment of the start moment of the fixed frequency compressor. After the first moment, controlling a fixed-frequency compressor of the refrigerator to operate for a second preset time period t2 to a third moment according to the first rotating frequency; and controlling the rotating frequency of the fixed-frequency compressor of the refrigerator to be gradually increased to the second rotating frequency for a third preset time period t3 after the third moment, wherein the first preset time period t1 comprises a second preset time period t2 and a third preset time period t3.
Compared with the first mode, the fourth mode includes a gradual change period in which the rotational frequency is gradually increased to the second rotational frequency within a third predetermined time period t3 after the rotational frequency stabilization period of the second predetermined time period t 2. When the third predetermined time period t3 is reached, the rotational frequency may be increased steadily according to a change rate of the predetermined fixed value, or the increasing speed of the rotational frequency may be increased gradually according to a gradual increase mode of the increase rate.
The first predetermined time period t1 may include a second predetermined time period t2 and a third predetermined time period t3, for example, the first predetermined time period t1 may be the sum of the second predetermined time period t2 and the third predetermined time period t3.
The second predetermined time period t2 and the third predetermined time period t3 may be determined according to parameters such as the first rotation frequency and the rotation frequency increasing speed. Or, in a possible implementation manner, the second predetermined time period t2 and the third predetermined time period t3 may also be determined according to the first predetermined time period t1, and other unknown parameters, including, for example, the rate of increase of the rotation frequency, may also be determined according to the determined second predetermined time period t2 and the determined third predetermined time period t3.
The fourth mode comprises a stable period and a gradual rising period of the rotation frequency, and the system can adapt to the pressure change of the stable period through the stable period of the previous period without generating larger noise. After the system adapts to the pressure change, the refrigerator can be quickly restored to the set temperature by gradually increasing the rotation frequency.
The above four modes are possible implementation modes exemplified by the present application, and are not limited to the above four modes, and the system can also gradually increase to the set second rotation frequency through other conversion curves of the rotation frequency, so that the noise caused by the flow of the system refrigerant is reduced, and the system starting efficiency is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Fig. 6 is a schematic diagram of a starting apparatus of a fixed-frequency compressor of a refrigerator according to an embodiment of the present application, as shown in fig. 6, the apparatus includes:
the first open-loop control unit 601 is used for controlling a fixed-frequency compressor of the refrigerator to operate according to a first rotating frequency in an open-loop control mode at a first moment when the refrigerator is started;
the second open-loop control unit 602 is configured to increase the rotation frequency of the fixed-frequency compressor through open-loop control, and control the rotation frequency of the fixed-frequency compressor of the refrigerator to be the second rotation frequency at the second moment, the second moment is the moment after the first moment and after the first preset duration, and the second rotation frequency is the rotation frequency during the normal operation state of the refrigerator and the first rotation frequency is less than the second rotation frequency.
The starting device of the constant frequency compressor of the refrigerator shown in fig. 6 corresponds to the starting method of the constant frequency compressor of the refrigerator shown in fig. 1.
Fig. 7 is a schematic view of a refrigerator provided in an embodiment of the present application. As shown in fig. 7, the refrigerator 7 of this embodiment includes: a processor 70, a memory 71 and a computer program 72 stored in said memory 71 and executable on said processor 70, such as a start-up program for a constant frequency compressor of a refrigerator. The processor 70, when executing the computer program 72, implements the steps in the above-described embodiments of the method for starting the fixed-frequency compressor of each refrigerator. Alternatively, the processor 70 implements the functions of the modules/units in the above-described device embodiments when executing the computer program 72.
Illustratively, the computer program 72 may be partitioned into one or more modules/units that are stored in the memory 71 and executed by the processor 70 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 72 in the refrigerator 7.
The refrigerator may include, but is not limited to, a processor 70, a memory 71. It will be appreciated by those skilled in the art that fig. 7 is merely an example of the refrigerator 7 and does not constitute a limitation of the refrigerator 7 and may include more or fewer components than shown, or some components in combination, or different components, for example the refrigerator may also include input output devices, network access devices, buses, etc.
The Processor 70 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 71 may be an internal storage unit of the refrigerator 7, such as a hard disk or a memory of the refrigerator 7. The memory 71 may also be an external storage device of the refrigerator 7, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the refrigerator 7. Further, the memory 71 may also include both an internal storage unit and an external storage device of the refrigerator 7. The memory 71 is used to store the computer program and other programs and data required by the refrigerator. The memory 71 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated module/unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the methods described above can be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U.S. disk, removable hard disk, magnetic diskette, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunications signal, and software distribution medium, etc. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.

Claims (11)

1. A method for starting a fixed-frequency compressor of a refrigerator, the method comprising:
controlling a fixed-frequency compressor of the refrigerator to operate according to a first rotating frequency in an open-loop control mode at a first moment when the refrigerator is started;
increase through the mode of open loop control the rotational frequency of fixed frequency compressor, control the rotational frequency of the fixed frequency compressor of refrigerator is the second rotational frequency at the second moment, the second moment is after first moment and through the moment of first predetermined duration, the second rotational frequency does rotational frequency and first rotational frequency during refrigerator normal operating condition are less than the second rotational frequency.
2. The method of claim 1, wherein controlling the rotational frequency of the fixed frequency compressor of the refrigerator to be a second rotational frequency at a second time comprises:
after the first moment, the fixed-frequency compressor of the refrigerator is controlled to gradually increase from the first rotating frequency to the second rotating frequency according to the preset increasing rate of the rotating frequency.
3. The method of claim 2, wherein the rate of increase is a fixed value or the rate of increase is a gradually increasing variable.
4. A method according to claim 3, characterized in that the rate of increase is 1-3Hz/s when the rate of increase is a fixed value.
5. The method of claim 1, wherein controlling the rotational frequency of the fixed frequency compressor of the refrigerator to be a second rotational frequency at a second time comprises:
after a first time, controlling a fixed-frequency compressor of the refrigerator to operate at a first rotating frequency for the first preset time;
and at the second moment, controlling the rotation frequency of a constant frequency compressor of the refrigerator, and switching from the first rotation frequency to the second rotation frequency.
6. The method of claim 1, wherein controlling the rotational frequency of the fixed frequency compressor of the refrigerator to be a second rotational frequency at a second time comprises:
after the first moment, controlling a fixed-frequency compressor of the refrigerator to operate for a second preset time to a third moment according to the first rotating frequency;
and controlling the rotating frequency of the fixed-frequency compressor of the refrigerator to be gradually increased to the second rotating frequency for a third preset time period after the third moment, wherein the first preset time period comprises a second preset time period and a third preset time period.
7. The method of claim 1, 5 or 6, wherein the first predetermined period of time is 30 to 60 seconds.
8. The method according to any one of claims 1 to 6, wherein the ratio of the first rotational frequency to the second rotational frequency is greater than or equal to 1/2 and less than or equal to 2/3.
9. A starting apparatus of a fixed frequency compressor of a refrigerator, comprising:
the first open-loop control unit is used for controlling a fixed-frequency compressor of the refrigerator to operate according to a first rotating frequency in an open-loop control mode at a first moment when the refrigerator is started;
and the second open-loop control unit is used for increasing the rotating frequency of the fixed-frequency compressor through an open-loop control mode, controlling the rotating frequency of the fixed-frequency compressor of the refrigerator to be the second rotating frequency at the second moment, the second moment is the moment after the first moment and after the first preset time, and the second rotating frequency is the rotating frequency during the normal running state of the refrigerator and the first rotating frequency is less than the second rotating frequency.
10. A refrigerator comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 8 are implemented when the processor executes the computer program.
11. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
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