CN115435543B - Method and device for controlling variable frequency compressor of refrigerator and refrigerator - Google Patents
Method and device for controlling variable frequency compressor of refrigerator and refrigerator Download PDFInfo
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- CN115435543B CN115435543B CN202110615175.3A CN202110615175A CN115435543B CN 115435543 B CN115435543 B CN 115435543B CN 202110615175 A CN202110615175 A CN 202110615175A CN 115435543 B CN115435543 B CN 115435543B
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method for controlling a variable frequency compressor of a refrigerator, which comprises the following steps: acquiring the real-time temperature in the refrigerator and the real-time environment temperature of the space where the refrigerator is located; determining a first difference between the temperature in the real-time box and a target control temperature; determining a first frequency of the compressor according to the first difference value, and determining a second frequency of the compressor according to the real-time ambient temperature; and if the first frequency is greater than the second frequency, controlling the compressor to operate at the first frequency, and if the first frequency is less than or equal to the second frequency, controlling the compressor to operate at the second frequency. The method for controlling the variable frequency compressor of the refrigerator can improve uniformity and stability of temperature in the refrigerator. The application also discloses a device for controlling the variable frequency compressor of the refrigerator and the refrigerator.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, and for example relates to a method and device for controlling a variable frequency compressor of a refrigerator and the refrigerator.
Background
The variable frequency compressor is widely applied to household appliances, and compared with the traditional fixed frequency compressor, the variable frequency compressor has the advantages of energy conservation and low noise, and can obviously improve the performance of the household appliances if a proper control method is adopted.
Taking the application of the variable-frequency compressor in refrigerator products as an example, the general refrigerator has urgent requirements on low energy consumption, but has no strict requirements on temperature uniformity in the refrigerator, so that the research on the control method of the refrigerator compressor in the prior art is mainly on the aspect of reducing energy consumption, and at present, the control method of the refrigerator products applying the variable-frequency compressor mainly has the idea of prolonging the shutdown time of the compressor as much as possible on the basis of meeting the temperature requirements of the refrigerator, thereby reducing noise in the use of the refrigerator and saving electric energy.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the existing control method of the refrigerator product compressor can reduce energy consumption, but can also lead to longer downtime of the compressor, thereby affecting the uniformity and stability of the temperature in the refrigerator. In some application scenarios with high requirements for temperature uniformity and stability, such as medical refrigerators, the existing control method cannot meet the requirements for the refrigerator on the uniformity and stability of the temperature in the refrigerator.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for controlling a variable frequency compressor of a refrigerator and the refrigerator, so as to solve the technical problem of how to improve the uniformity and stability of the temperature in the refrigerator.
In some embodiments, the method comprises: acquiring the real-time temperature in the refrigerator and the real-time environment temperature of the space where the refrigerator is located; determining a first difference between the temperature in the real-time box and a target control temperature; determining a first frequency of the compressor according to the first difference value, and determining a second frequency of the compressor according to the real-time ambient temperature; and if the first frequency is greater than the second frequency, controlling the compressor to operate at the first frequency, and if the first frequency is less than or equal to the second frequency, controlling the compressor to operate at the second frequency.
In some embodiments, the determining the first frequency of the compressor based on the first difference comprises: and under the condition that the first difference value is larger than a first preset value and smaller than or equal to a second preset value, determining the first frequency according to the first difference value and a first preset coefficient.
In some embodiments, the determining the first frequency of the compressor based on the first difference further comprises: and under the condition that the first difference value is larger than a second preset value, controlling the compressor to operate at a first preset frequency until the first difference value is adjusted to be smaller than or equal to the second preset value.
In some embodiments, the determining the compressor second frequency from the real-time ambient temperature comprises: setting the maintenance frequencies of the compressors corresponding to different environmental temperature intervals; and selecting the maintenance frequency of the compressor corresponding to the temperature interval where the real-time environment temperature is located as the second frequency of the compressor.
In some embodiments, the first frequency is determined once according to the first difference value and the second frequency is determined once according to the real-time ambient temperature every first preset time.
In some embodiments, the performing a compressor control process based on the first difference, the real-time ambient temperature, further comprises: controlling the compressor to switch on the power input under the condition that the first difference value is larger than a fourth preset value; and controlling the compressor to execute a starting process under the condition that the first difference value is larger than or equal to a third preset value, wherein the fourth preset value is larger than the third preset value.
In some embodiments, controlling the compressor to perform a start-up procedure includes: and controlling the compressor to start and operate at a second preset frequency for a second preset time.
In some embodiments, after the controlling the compressor to start and operate at a second preset frequency for a second preset time, further comprising; controlling the compressor to be shut down under the condition that the first difference value is smaller than or equal to a first preset value; and controlling the compressor to cut off power input under the condition that the first difference value is smaller than a fifth preset value, wherein the fifth preset value is smaller than the first preset value.
In some embodiments, the apparatus for controlling a variable frequency compressor of a refrigerator includes a processor and a memory storing program instructions, wherein the processor is configured to perform the above-described method for controlling a variable frequency compressor of a refrigerator when executing the program instructions.
In some embodiments, the refrigerator includes the above-described apparatus for controlling a variable frequency compressor of the refrigerator.
The method and the device for controlling the variable frequency compressor of the refrigerator, and the refrigerator provided by the embodiment of the disclosure can realize the following technical effects:
and acquiring the real-time in-box temperature of the refrigerator and the real-time environment temperature of the space where the refrigerator is located, determining a first difference value between the real-time in-box temperature and the target control temperature, and executing a compressor control process according to the first difference value and the real-time environment temperature. Specifically, the first frequency of the compressor is determined according to the first difference value, so that the first frequency of the variable frequency compressor for different first difference values can be determined; the second frequency of the compressor is determined based on the ambient temperature, such that a different second frequency of the variable frequency compressor for different ambient temperatures can be determined. And controlling the compressor to operate at the first frequency if the first frequency is greater than the second frequency, and controlling the compressor to operate at the second frequency if the first frequency is less than or equal to the second frequency.
For the variable frequency compressor of the refrigerator, the larger the first difference value is, the higher the temperature in the refrigerator is higher than the target control temperature, the larger the refrigeration intensity required for the temperature in the refrigerator to reach the target control temperature is, and the higher the first frequency determined according to the first difference value is. When the temperature in the refrigerator is close to the target control temperature, the first difference value is reduced, the refrigerating capacity required for the refrigerator to reach the target control temperature is also reduced, and the first frequency determined according to the first difference value is lower. When the temperature in the refrigerator is very close to the target control temperature, the influence of the heat exchanged by the refrigerator itself with the environment on the stability and uniformity of the temperature in the refrigerator becomes obvious. If the refrigerator compressor is still controlled to run at the first frequency, when the first frequency is lower than the second frequency, the heat exchange between the refrigerator and the environment can cause the refrigerator to hardly reach the target control temperature, and if the first frequency is increased at the moment, the temperature in the refrigerator can quickly reach the target control temperature, and further, the preset condition is achieved that the compressor is shut down. And start-stop of the compressor may cause fluctuation of the temperature in the refrigerator compartment. Therefore, the second frequency of the compressor is determined according to the ambient temperature, the second frequency is a frequency which can balance the refrigerating capacity of the refrigerator and the heat transferred to the refrigerator by the environment, when the first difference value is smaller and the first frequency is lower, the second frequency is used as the operation frequency of the compressor, so that the refrigerator is in a state that the refrigerating capacity is balanced with the heat absorbed from the environment, the refrigerator is further kept at the preset temperature continuously, the problem that the temperature in the refrigerator cannot reach the target control temperature or the compressor is frequently started and stopped due to the fact that the first frequency determined according to the first difference value is lower or higher is avoided, and further, the stability and uniformity of the temperature in the refrigerator are improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic diagram of a method for controlling a variable frequency compressor of a refrigerator provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of an apparatus for controlling a variable frequency compressor of a refrigerator provided in an embodiment of the present disclosure;
fig. 3 is a schematic view of another apparatus for controlling a variable frequency compressor of a refrigerator provided in an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
Referring to fig. 1, an embodiment of the present disclosure provides a method for controlling a variable frequency compressor of a refrigerator, including:
s101, the refrigerator obtains the real-time temperature in the refrigerator and the real-time environment temperature of the space where the refrigerator is located.
S102, the refrigerator determines a first difference value between the temperature in the real-time refrigerator and the target control temperature.
S103, the refrigerator determines a first frequency of the compressor according to the first difference value, and determines a second frequency of the compressor according to the real-time environment temperature; if the first frequency is greater than the second frequency, the refrigerator controls the compressor to operate at the first frequency, and if the first frequency is less than or equal to the second frequency, the refrigerator controls the compressor to operate at the second frequency.
By adopting the method for controlling the variable frequency compressor of the refrigerator, which is provided by the embodiment of the invention, the stability and uniformity of the temperature in the refrigerator can be improved. For the variable frequency compressor of the refrigerator, the larger the first difference value is, the more the temperature in the refrigerator is higher than the target control temperature, the larger the refrigeration intensity required for the temperature in the refrigerator to reach the target control temperature is, and the higher the first frequency determined according to the first difference value is. When the temperature in the refrigerator is close to the target control temperature, the first difference value is reduced, the refrigerating capacity required for the refrigerator to reach the target control temperature is also reduced, and the first frequency determined according to the first difference value is lower. When the temperature in the refrigerator is very close to the target control temperature, the influence of the heat exchanged by the refrigerator itself with the environment on the stability and uniformity of the temperature in the refrigerator becomes obvious. The maintenance frequency is a compressor operation frequency at which the refrigerating capacity of the refrigerator and the heat transferred from the environment to the refrigerator can be balanced at the current real-time environment temperature, and the compressor maintenance frequency corresponding to different real-time environment temperatures can be experimentally measured for different refrigerators. If the refrigerator compressor is still controlled to operate at the first frequency when the first difference is relatively small, when the first frequency is lower than the maintenance frequency, the heat exchange between the refrigerator and the environment can cause the refrigerator to hardly reach the target control temperature; if the first frequency is larger than the maintaining frequency, the temperature in the refrigerator can quickly reach the target control temperature, further, the compressor is shut down when reaching the preset condition, and the start-stop of the compressor can cause the fluctuation of the temperature in the refrigerator. Therefore, the second frequency of the compressor is determined according to the ambient temperature, the second frequency is a frequency which can balance the refrigerating capacity of the refrigerator and the heat transferred to the refrigerator by the environment, when the first difference value is smaller and the first frequency is lower, the second frequency is used as the operation frequency of the compressor, so that the refrigerator is in a state that the refrigerating capacity is balanced with the heat absorbed from the environment, the refrigerator is further kept at the preset temperature continuously, the problem that the temperature in the refrigerator cannot reach the target control temperature or the compressor is frequently started and stopped due to the fact that the first frequency is lower or higher according to the first difference value is avoided, and further, the stability and uniformity of the temperature in the refrigerator are improved.
In a method for controlling a variable frequency compressor of a refrigerator provided by an embodiment of the present disclosure, a first frequency is positively correlated with a first difference. The larger the first difference value is, the more the temperature in the refrigerator deviates from the target control temperature, the more urgent the cooling requirement of the refrigerator is, and therefore, the higher the first frequency is, so that the refrigerating efficiency can be improved, and the time required for adjusting the temperature in the refrigerator to the target control temperature is shortened.
Optionally, determining the first frequency of the compressor based on the first difference comprises: and under the condition that the first difference value is larger than a first preset value and smaller than or equal to a second preset value, the refrigerator determines a first frequency according to the first difference value and a first preset coefficient. When the first difference value is larger than the first preset value and smaller than or equal to the second preset value, the temperature value of the temperature in the refrigerator, deviating from the target control temperature, is considered to be in the range of automatic adjustment of the variable frequency compressor, the variable frequency compressor is controlled by the refrigerator to enter an automatic adjustment stage, and at the moment, the first frequency for controlling variable frequency operation of the variable frequency compressor of the refrigerator is determined according to the first difference value. For example, if the temperature in the refrigerator is Ti, the target control temperature is Ts, the adjustment coefficient is P, and the first frequency is Fc:
Fc＝P×(Ti-Ts)
thus, the larger the first difference value is, the higher the first frequency is, the higher the refrigerating efficiency of the refrigerator is, and the faster the temperature Ti in the refrigerator reaches the target control temperature Ts is, when the first frequency is taken as the operating frequency of the compressor. Optionally, the adjustment coefficient P is determined according to the frequency range of the compressor, the first preset value and the second preset value, so that the first frequency Fc is equal to the highest frequency of the compressor when the first difference is equal to the second preset value, and the refrigerator can obtain the fastest cooling speed.
Optionally, determining the first frequency of the compressor from the first difference further comprises: and under the condition that the first difference value is larger than the second preset value, controlling the compressor to operate at the first preset frequency until the first difference value is adjusted to be smaller than or equal to the second preset value. When the first difference value is larger than the second preset value, the temperature in the refrigerator is considered to deviate more from the target control temperature, and the refrigerator enters a full-speed cooling stage. At this time, the refrigerator needs to control the variable frequency compressor of the refrigerator to operate at the highest frequency so as to achieve the highest refrigeration efficiency, and speed up the temperature in the refrigerator to reach the target control temperature until the first difference value is adjusted to be smaller than or equal to the second preset value.
Optionally, the first preset frequency is the highest frequency of the variable frequency compressor, so that the refrigerating speed can be increased.
Optionally, the first preset frequency is slightly lower than the highest frequency of the compressor, for example 90% of the highest frequency of the variable frequency compressor, so that higher refrigeration speeds can be achieved while avoiding the compressor from being noisier and even damaging at the highest frequency.
Optionally, determining the compressor second frequency based on the real-time ambient temperature includes: setting the maintenance frequencies of the compressors corresponding to different environmental temperature intervals; and selecting the maintenance frequency of the compressor corresponding to the temperature interval where the real-time environment temperature is located as the second frequency of the compressor. The maintenance frequency is the operation frequency of the variable frequency compressor when the refrigerating capacity of the variable frequency compressor is balanced with the heat exchanged with the environment, and the maintenance frequency of the variable frequency compressor at different environment temperatures is different for different refrigerators, but can be measured through limited experiments. At a smaller first difference, the refrigeration efficiency of the refrigerator is reduced, and the influence of the heat exchanged between the refrigerator and the environment on the temperature in the refrigerator becomes more obvious. The temperature in the refrigerator is generally lower than the environment in which the refrigerator is located, so that heat is transferred from the environment in which the refrigerator is located to the environment in which the refrigerator is located through heat transfer, and the temperature in the refrigerator is increased. When the temperature of the environment where the refrigerator is located is higher, more heat is exchanged between the refrigerator and the environment where the refrigerator is located in the refrigerator, and at the moment, the second frequency is correspondingly increased, so that the refrigerating capacity of the refrigerator when the variable frequency compressor is controlled to operate at the second frequency is increased. When the temperature of the environment where the refrigerator is positioned is low, the heat exchanged with the environment where the refrigerator is positioned in the refrigerator is relatively small, and the second frequency is correspondingly reduced at the moment, so that the refrigerating capacity of the refrigerator when the variable frequency compressor is controlled to operate at the second frequency is reduced. Alternatively, the second frequency corresponding to a different ambient temperature may be experimentally measured. Optionally, a comparison table of different environment temperatures and corresponding second frequencies is preset, and when the environment temperature of the refrigerator is different, the second frequency of the refrigerator is determined through the local or online comparison table.
Optionally, determining the compressor second frequency based on the real-time ambient temperature includes: and determining a second difference between the real-time environment temperature and the target control temperature, and determining a second frequency of the compressor according to the second difference. When the refrigerator exchanges heat with the environment where the refrigerator is located, the efficiency of heat exchange depends on the heat insulation capability of the refrigerator itself and the temperature difference between the refrigerator and the environment where the refrigerator is located. The heat insulation capacity of the refrigerator is determined, when the second difference value is larger, the heat exchange efficiency between the refrigerator and the environment where the refrigerator is positioned is higher, and the second frequency is higher at the moment, so that the refrigerating capacity of the refrigerator when the variable frequency compressor of the refrigerator is controlled to operate at the second frequency is correspondingly improved; when the second difference value is smaller, the heat exchange efficiency between the refrigerator and the environment where the refrigerator is located is lower, and the second frequency is lower at the moment, so that the refrigerating capacity of the refrigerator when the refrigerator controls the refrigerator variable frequency compressor to operate at the second frequency is correspondingly reduced, and the stability of the temperature in the refrigerator is ensured. The second frequency corresponding to the second difference may be experimentally measured. Optionally, a table of different second differences and corresponding second frequencies is preset, and the refrigerator second frequency is determined through a local or online table when the refrigerator second differences are different.
Optionally, determining the compressor second frequency based on the real-time ambient temperature includes: and determining a third difference between the real-time ambient temperature and the temperature in the refrigerator, and determining a second frequency of the compressor according to the third difference. When the refrigerator exchanges heat with the environment where the refrigerator is located, the efficiency of heat exchange depends on the heat insulation capability of the refrigerator itself and the temperature difference between the refrigerator and the environment where the refrigerator is located. The heat insulation capacity of the refrigerator is determined, when the third difference value is larger, the heat exchange efficiency between the refrigerator and the environment where the refrigerator is positioned is higher, and the second frequency is higher at the moment, so that the refrigerating capacity of the refrigerator when the variable frequency compressor of the refrigerator is controlled to operate at the second frequency is correspondingly improved; when the third difference value is smaller, the heat exchange efficiency between the refrigerator and the environment where the refrigerator is located is lower, and the second frequency is lower at the moment, so that the refrigerating capacity of the refrigerator when the refrigerator controls the refrigerator variable frequency compressor to operate at the second frequency is correspondingly reduced, and the stability of the temperature in the refrigerator is ensured. The second frequency corresponding to the third difference may be experimentally measured. Optionally, a table of different third differences and corresponding second frequencies is preset, and the second frequencies of the refrigerator are determined through a local or online table when the third differences of the refrigerator are different.
Optionally, the compressor operating frequency is determined once at intervals of a first preset time according to the first difference and the real-time ambient temperature. Therefore, frequent changes of the frequency of the compressor can be effectively avoided, the running stability of the variable frequency compressor of the refrigerator is guaranteed, and the service life of the variable frequency compressor is prolonged. The length of the first preset time is determined according to the requirement of the refrigerator on the stability of the temperature in the refrigerator. The higher the stability requirement of the refrigerator for the temperature in the refrigerator, the shorter the first preset time. Alternatively, the first preset time ranges from 30 seconds to 15 minutes.
Optionally, after the refrigerator determines the first difference between the real-time in-box temperature and the target control temperature, the method for controlling the variable frequency compressor of the refrigerator further comprises: controlling the compressor to switch on the power input under the condition that the first difference value is larger than a fourth preset value; and controlling the compressor to execute a starting process under the condition that the first difference value is larger than or equal to a third preset value, wherein the fourth preset value is larger than the third preset value. When the refrigerator is powered on for the first time or the target control temperature is changed, the compressor is in a power-off input state, the first difference value is larger than a fourth preset value, the refrigerator firstly controls the compressor to be powered on for inputting, and the first difference value is necessarily larger than the third preset value, so that the refrigerator controls the compressor to execute a starting process after the compressor is powered on for inputting, the power-on input and the control of the compressor to execute the starting process are executed in two steps, and the influence of too large current change on a system circuit in a short time is avoided. When the temperature in the refrigerator is much lower than the target control temperature, the temperature in the refrigerator is considered to be abnormal, the compressor is in a circuit-breaking state to prevent the temperature from further lowering, the temperature in the refrigerator is gradually raised along with the temperature in the refrigerator, a third preset value is reached at first, the compressor can not be started up even though the starting condition is reached, the first difference value is larger than a fourth preset value along with the continuous rise of the temperature in the refrigerator because the power input is not turned on, and the refrigerator controls the compressor to be turned on and controls the compressor to execute the starting process. Therefore, a section of transition temperature is arranged between the start-up of the compressor and the connection of the compressor to the power input, the damage to the refrigerator caused by frequent disconnection and connection of the compressor to the power input due to abnormal fluctuation of the temperature in the refrigerator is avoided, meanwhile, the condition that the compressor is not started for a long time but keeps the power input all the time is avoided, the energy consumption is reduced, and the electric shock risk of the refrigerator is also reduced. And when the temperature is in the regulation range, the compressor is not disconnected from power input, the temperature in the refrigerator is gradually increased when the compressor is stopped, and the starting process is executed by the compressor when the first difference value is larger than or equal to a third preset value. Therefore, the refrigerator can control the compressor to start up in time when the temperature in the refrigerator normally fluctuates, and the response speed of the refrigerator compressor is improved.
Optionally, the refrigerator controlling the compressor to perform the starting process includes: the refrigerator controls the compressor to start and operate at a second preset frequency for a second preset time. Insufficient lubrication at the start-up of the compressor may affect the life of the inverter compressor if operated at higher frequencies. Therefore, after the compressor is started, the refrigerator controls the compressor to execute a soft start process of running at a second preset frequency for a second preset time, and the second frequency is lower, so that the variable frequency compressor can be started at a low rotating speed, thereby being fully lubricated and prolonging the service life of the compressor. Moreover, the low-rotation-speed starting of the variable-frequency compressor has small impact on the refrigerating system of the refrigerator, so that the service life of the refrigerating system of the refrigerator can be prolonged while the smooth starting is ensured. Optionally, the second preset time is inversely related to the second preset frequency, and the lower the second preset frequency is, the longer the second preset time is, so that the lubrication effect of the compressor can be ensured.
Optionally, after the refrigerator controls the compressor to start and operates at the second preset frequency for a second preset time, the method for controlling the variable frequency compressor of the refrigerator further includes: controlling the compressor to be shut down by the refrigerator under the condition that the first difference value is smaller than or equal to a first preset value; and controlling the compressor to break the power input under the condition that the first difference value is smaller than a fifth preset value, wherein the fifth preset value is smaller than the first preset value. In the case that the first difference is less than or equal to the first preset value, the refrigerator controls the compressor to stop in order to prevent the temperature in the refrigerator from further decreasing. When the first difference value is smaller than a fifth preset value, the temperature in the refrigerator is lower than the target control temperature by a relatively large amount, the temperature in the refrigerator is considered to be abnormal at the moment, and the refrigerator forcibly cuts off the power input of the variable-frequency compressor so as to ensure that the temperature in the refrigerator cannot be further reduced and ensure the safety of a refrigerating system of the refrigerator. Optionally, the refrigerator alarms when the first difference is smaller than a fifth preset value. More specifically, in the case where the target control temperature is not changed for a period of time and the first difference is less than the fifth preset value, the refrigerator alarms.
As shown in conjunction with fig. 2, an embodiment of the present disclosure provides an apparatus for controlling a variable frequency compressor of a refrigerator, including an acquisition module 21, a determination module 22, and a control module 23. The acquisition module 21 is configured to acquire a real-time in-box temperature of the refrigerator and a real-time ambient temperature of a space in which the refrigerator is located; the determination module 22 is configured to determine a first difference between the real-time in-tank temperature and the real-time ambient temperature, determine a first frequency of the compressor based on the first difference, and determine a second frequency of the compressor based on the real-time ambient temperature; the control module 23 is configured to perform a compressor control process based on the first difference and the real-time ambient temperature. Wherein performing the compressor control process based on the first difference and the real-time ambient temperature comprises: the compressor is controlled to operate at a first frequency when the first frequency is greater than the second frequency, and is controlled to operate at a second frequency when the first frequency is less than or equal to the second frequency.
By adopting the device for controlling the variable frequency compressor of the refrigerator, provided by the embodiment of the disclosure, the stability and uniformity of the temperature in the refrigerator can be improved. For the variable frequency compressor of the refrigerator, the larger the first difference value is, the more the temperature in the refrigerator is higher than the target control temperature, the larger the refrigeration intensity required for the temperature in the refrigerator to reach the target control temperature is, and the higher the first frequency determined according to the first difference value is. When the temperature in the refrigerator is close to the target control temperature, the first difference value is reduced, the refrigerating capacity required for the refrigerator to reach the target control temperature is also reduced, and the first frequency determined according to the first difference value is lower. When the temperature in the refrigerator is very close to the target control temperature, the influence of the heat exchanged by the refrigerator itself with the environment on the stability and uniformity of the temperature in the refrigerator becomes obvious. The maintenance frequency is a compressor operation frequency at which the refrigerating capacity of the refrigerator and the heat transferred from the environment to the refrigerator can be balanced at the current real-time environment temperature, and the compressor maintenance frequency corresponding to different real-time environment temperatures can be experimentally measured for different refrigerators. If the refrigerator compressor is still controlled to operate at the first frequency when the first difference is relatively small, when the first frequency is lower than the maintenance frequency, the heat exchange between the refrigerator and the environment can cause the refrigerator to hardly reach the target control temperature; if the first frequency is larger than the maintaining frequency, the temperature in the refrigerator can quickly reach the target control temperature, further, the compressor is shut down when reaching the preset condition, and the start-stop of the compressor can cause the fluctuation of the temperature in the refrigerator. Therefore, the second frequency of the compressor is determined according to the ambient temperature, the second frequency is a frequency which can balance the refrigerating capacity of the refrigerator and the heat transferred to the refrigerator by the environment, when the first difference value is smaller and the first frequency is lower, the second frequency is used as the operation frequency of the compressor, so that the refrigerator is in a state that the refrigerating capacity is balanced with the heat absorbed from the environment, the refrigerator is further kept at the preset temperature continuously, the problem that the temperature in the refrigerator cannot reach the target control temperature or the compressor is frequently started and stopped due to the fact that the first frequency is lower or higher according to the first difference value is avoided, and further, the stability and uniformity of the temperature in the refrigerator are improved.
Optionally, the control module 23 is further configured to control the compressor to perform a start-up procedure if the first difference is greater than or equal to a third preset value; and controlling the compressor to be shut down under the condition that the first difference value is smaller than or equal to a first preset value, wherein the first preset value is smaller than a second preset value. When the compressor is stopped after the compressor reaches the stop condition, the first difference value is greater than or equal to a third preset value as the temperature in the tank gradually increases or the target control temperature changes. At this time, the control module 23 controls the compressor to perform a starting process at this time; when the temperature in the refrigerator has been lower than the target control temperature or the target control temperature is changed, the control module 23 controls the inverter compressor to stop if the compressor continues to operate to cause the temperature in the refrigerator to continue to decrease if the first difference is smaller than or equal to the first preset value. Thus, the control module 23 controls the variable frequency compressor to execute the starting process or stop according to the first difference value, so that the condition that the temperature in the refrigerator is lower than the target control temperature or is higher than the target control temperature but not refrigerating can be prevented, the stability of the temperature in the refrigerator is improved, and the refrigerator is more perfect and intelligent in controlling the variable frequency compressor.
Optionally, the control module 23 controls the compressor to perform a start-up procedure including: and controlling the compressor to start and operate at a second preset frequency for a second preset time. Insufficient lubrication at the start-up of the compressor may affect the life of the inverter compressor if operated at higher frequencies. Therefore, after the compressor is started, the control module 23 controls the compressor to perform a soft start process of running at a second preset frequency for a second preset time, and the second frequency is lower, so that the variable frequency compressor can be started at a low rotation speed, thereby being fully lubricated and prolonging the service life of the compressor. Moreover, the low-rotation-speed starting of the variable-frequency compressor has small impact on the refrigerating system of the refrigerator, so that the service life of the refrigerating system of the refrigerator can be prolonged while the smooth starting is ensured. Optionally, the second preset time is inversely related to the second preset frequency, and the lower the second preset frequency is, the longer the second preset time is, so that the lubrication effect of the compressor can be ensured.
Optionally, the control module 23 is further configured to control the compressor to switch on the power input if the first difference is greater than a fourth preset value; in case the first difference is smaller than the fifth preset value, the control module 23 controls the compressor to break off the power input; wherein the fifth preset value is smaller than the first preset value. After the refrigerator is first powered on or the variable frequency compressor is turned off, the power input needs to be turned on according to a compressor on power input condition, specifically, the first difference value is larger than a fourth preset value. At this time, the temperature in the refrigerator deviates from the target control temperature by a great amount, and the power input of the variable frequency compressor needs to be connected to cool the space in the refrigerator. When the first difference value is smaller than the fifth preset value, the temperature in the refrigerator is lower than the target control temperature by a relatively large amount, and at the moment, the temperature in the refrigerator is considered to be abnormal, and the control module 23 forcibly cuts off the power input of the variable frequency compressor so as to ensure that the temperature in the refrigerator cannot be further reduced and ensure the safety of a refrigerating system of the refrigerator.
As shown in connection with fig. 3, an embodiment of the present disclosure provides an apparatus for controlling a variable frequency compressor of a refrigerator, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for controlling the inverter compressor of the refrigerator of the above-described embodiment.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 performs functional applications as well as data processing by running program instructions/modules stored in the memory 101, i.e., implements the method for controlling the inverter compressor of the refrigerator in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a product (such as a computer, a mobile phone and the like) comprising the device for controlling the variable frequency compressor of the refrigerator.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for controlling a variable frequency compressor of a refrigerator.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-described method for controlling a variable frequency compressor of a refrigerator.
The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of 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 solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for controlling a variable frequency compressor of a refrigerator, comprising:
acquiring the real-time temperature in the refrigerator and the real-time environment temperature of the space where the refrigerator is located;
determining a first difference between the temperature in the real-time box and a target control temperature;
determining a first frequency of the compressor according to the first difference value, and determining a second frequency of the compressor according to the real-time ambient temperature;
and if the first frequency is greater than the second frequency, controlling the compressor to operate at the first frequency, and if the first frequency is less than or equal to the second frequency, controlling the compressor to operate at the second frequency.
2. The method of claim 1, wherein determining the first frequency of the compressor based on the first difference comprises:
and under the condition that the first difference value is larger than a first preset value and smaller than or equal to a second preset value, determining the first frequency according to the first difference value and a first preset coefficient.
3. The method of claim 2, wherein determining the first frequency of the compressor based on the first difference further comprises:
and under the condition that the first difference value is larger than a second preset value, controlling the compressor to operate at a first preset frequency until the first difference value is adjusted to be smaller than or equal to the second preset value.
4. The method of claim 1, wherein said determining the compressor second frequency based on the real-time ambient temperature comprises:
setting the maintenance frequencies of the compressors corresponding to different environmental temperature intervals;
and selecting the maintenance frequency of the compressor corresponding to the temperature interval where the real-time environment temperature is located as the second frequency of the compressor.
5. The method of claim 1, wherein the first frequency is determined based on the first difference value and the second frequency is determined based on the real-time ambient temperature once every first preset time.
6. The method of any one of claims 1 to 5, further comprising, after said determining a first difference between said real-time in-tank temperature and a target control temperature:
controlling the compressor to switch on the power input under the condition that the first difference value is larger than a fourth preset value;
controlling the compressor to perform a start-up procedure in case the first difference is greater than or equal to a third preset value,
wherein the fourth preset value is greater than the third preset value.
7. The method of claim 6, wherein controlling the compressor to perform a start-up procedure comprises:
and controlling the compressor to start and operate at a second preset frequency for a second preset time.
8. The method of claim 7, further comprising, after said controlling the compressor to start and run at a second preset frequency for a second preset time;
controlling the compressor to be shut down under the condition that the first difference value is smaller than or equal to a first preset value;
and controlling the compressor to cut off the power input under the condition that the first difference value is smaller than a fifth preset value,
wherein the fifth preset value is smaller than the first preset value.
9. An apparatus for controlling a variable frequency compressor of a refrigerator comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling a variable frequency compressor of a refrigerator as claimed in any one of claims 1 to 8 when executing the program instructions.
10. A refrigerator comprising the apparatus for controlling a variable frequency compressor of a refrigerator according to claim 9.
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| CN202110615175.3A CN115435543B (en) | 2021-06-02 | 2021-06-02 | Method and device for controlling variable frequency compressor of refrigerator and refrigerator |
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