CN113915827A - Rotating speed control method for refrigerator and variable frequency compressor - Google Patents
Rotating speed control method for refrigerator and variable frequency compressor Download PDFInfo
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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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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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
- 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
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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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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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
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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
- 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
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/02—Sensors detecting door opening
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
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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 invention discloses a refrigerator, which comprises a variable frequency compressor, an environment temperature sensor, a room temperature sensor and a controller, wherein the controller is used for: when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction, acquiring the current environment temperature, and calculating the current compartment temperature difference; acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold; and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed. The invention also provides a control method of the variable frequency compressor. By adopting the embodiment of the invention, the working efficiency of the variable frequency compressor can be improved, and the energy consumption of the refrigerator can be reduced.
Description
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a rotating speed control method of a refrigerator and a variable frequency compressor.
Background
The variable frequency compressor can be in the best running state through stepless adjustment of the rotating speed so as to achieve the optimal working efficiency. In the frequency conversion refrigerator using the frequency conversion compressor, the power consumption of the whole refrigerator is mainly reflected on the output power of the compressor, and the refrigerator adopts the compressor in the optimal working state to refrigerate, so that the aims of saving energy and reducing consumption can be fulfilled.
At present, in the frequency conversion refrigerators sold on the market, the rotating speed of the frequency conversion compressor is generally provided with a plurality of rotating speed gears. In the using process of the refrigerator, after the inverter compressor enters a stable operation stage, the inverter compressor is generally cured into one or two speed gears for operation. However, the inventors found that the prior art has at least the following problems: for the use condition of the refrigerator, the switching of the rotating speed of one compressor to two compressors obviously cannot enable the inverter compressor to be in the best running state, so that the inverter refrigerator is not always in the most energy-saving state, and the aim of saving energy is difficult to achieve.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a rotating speed control method of a variable frequency compressor, which can adjust the rotating speed of the variable frequency compressor according to the real-time working condition of the refrigerator, effectively improve the working efficiency of the compressor and reduce the energy consumption of the refrigerator.
To achieve the above object, an embodiment of the present invention provides a refrigerator, including:
the refrigerator comprises a refrigerator body, a storage box and a control device, wherein a plurality of storage chambers are arranged inside the refrigerator body;
the variable frequency compressor is arranged in the refrigerator body;
the environment temperature sensor is arranged outside the refrigerator body and used for detecting the environment temperature of the refrigerator in real time;
the compartment temperature sensor is arranged in the refrigerator body and used for detecting the compartment temperature of the storage chamber in real time;
the controller is respectively and electrically connected with the variable frequency compressor, the environment temperature sensor and the room temperature sensor and is used for:
when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter; the temperature parameters include: recording the current ambient temperature detected by the ambient temperature sensor and the current compartment temperature detected by the compartment temperature sensor as a first compartment temperature, and recording the compartment temperature detected by the compartment temperature sensor as a second compartment temperature after a first preset time period;
calculating the current compartment temperature difference according to the first compartment temperature and the second compartment temperature;
acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold;
and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed.
As an improvement of the above scheme, the calculating an adjusted operating speed according to a comparison relationship between the current compartment temperature difference and the compartment temperature difference threshold specifically includes:
when the current compartment temperature difference is larger than the compartment temperature difference threshold value, reducing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed;
when the current compartment temperature difference is smaller than the compartment temperature difference threshold value, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length so as to obtain the adjusted running rotating speed;
and when the current compartment temperature difference is equal to the compartment temperature difference threshold value, taking the current running rotating speed of the variable frequency compressor as the adjusted rotating speed.
As an improvement of the above scheme, the mapping relation between the environmental temperature and the compartment temperature difference threshold is constructed by the following steps:
determining the environment temperature range of the refrigerator, and dividing the environment temperature range into a plurality of environment temperature intervals;
calculating the optimal running rotating speed of the variable frequency compressor in each environment temperature interval of the refrigerator;
calculating the compartment temperature difference of the storage compartment within the first preset time when the variable frequency compressor runs at the optimal running speed in each environment temperature interval of the refrigerator;
and constructing a mapping relation between the environment temperature and a compartment temperature difference threshold according to the corresponding relation between the environment temperature interval and the optimal operation rotating speed of the variable frequency compressor and the corresponding relation between the compartment temperature difference of the storage chamber and the optimal operation rotating speed of the variable frequency compressor.
As an improvement of the above scheme, the refrigerator further comprises a compartment door opening and closing sensor; the compartment door switch sensor is arranged in the refrigerator body and used for detecting the door switch state of the storage compartment in real time; the door switch state comprises an opening state and a closing state; the controller is also electrically connected with the compartment door switch sensor;
the controller is further configured to:
acquiring the door opening and closing state detected by the compartment door opening and closing sensor in real time;
if the door opening and closing state of the storage chamber is detected to be an opening state, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed, and the variable frequency compressor is controlled to run at the adjusted running rotating speed;
and after the second preset time period, controlling the variable frequency compressor to operate at the operating speed before adjustment.
As an improvement of the above, the controller is further configured to:
if the door switch state of the storage chamber is detected to be an open state in the process of acquiring the temperature parameter, clearing the acquired data of the temperature parameter; and the number of the first and second groups,
after the second preset time period, after the variable frequency compressor is controlled to operate at the running speed before adjustment, the following steps are executed again: and responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter.
The embodiment of the invention also provides a rotating speed control method of the variable frequency compressor, the variable frequency compressor is arranged in the refrigerator, and the control method comprises the following steps:
when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter; the temperature parameters include: recording the current ambient temperature of the refrigerator, the current compartment temperature of a storage compartment inside the refrigerator as a first compartment temperature, and recording the compartment temperature of the storage compartment inside the refrigerator after a first preset time period as a second compartment temperature;
calculating the current compartment temperature difference according to the first compartment temperature and the second compartment temperature;
acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold;
and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed.
As an improvement of the above scheme, the calculating an adjusted operating speed according to a comparison relationship between the current compartment temperature difference and the compartment temperature difference threshold specifically includes:
when the current compartment temperature difference is larger than the compartment temperature difference threshold value, reducing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed;
when the current compartment temperature difference is smaller than the compartment temperature difference threshold value, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length so as to obtain the adjusted running rotating speed;
and when the current compartment temperature difference is equal to the compartment temperature difference threshold value, taking the current running rotating speed of the variable frequency compressor as the adjusted rotating speed.
As an improvement of the above scheme, the mapping relation between the environmental temperature and the compartment temperature difference threshold is constructed by the following steps:
determining the environment temperature range of the refrigerator, and dividing the environment temperature range into a plurality of environment temperature intervals;
calculating the optimal running rotating speed of the variable frequency compressor in each environment temperature interval of the refrigerator;
calculating the compartment temperature difference of the storage compartment within the first preset time when the variable frequency compressor runs at the optimal running speed in each environment temperature interval of the refrigerator;
and constructing a mapping relation between the environment temperature and a compartment temperature difference threshold according to the corresponding relation between the environment temperature interval and the optimal operation rotating speed of the variable frequency compressor and the corresponding relation between the compartment temperature difference of the storage chamber and the optimal operation rotating speed of the variable frequency compressor.
As an improvement of the above, the control method further includes:
acquiring the door opening and closing state of the storage room in real time; the door switch state comprises an opening state and a closing state;
if the door opening and closing state of the storage chamber is detected to be an opening state, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed, and the variable frequency compressor is controlled to run at the adjusted running rotating speed;
and after the second preset time period, controlling the variable frequency compressor to operate at the operating speed before adjustment.
As an improvement of the above, if it is detected that the door switch state of the storage room is in the open state in the process of acquiring the temperature parameter, the control method further includes:
clearing the acquired data of the temperature parameter; and the number of the first and second groups,
after the second preset time period, after the variable frequency compressor is controlled to operate at the running speed before adjustment, the following steps are executed again: and responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter.
Compared with the prior art, the invention discloses a rotating speed control method of a refrigerator and a variable frequency compressor, when the refrigerator is in a refrigerating state, the current environment temperature is obtained in response to a preset compressor rotating speed adjusting instruction, and the current compartment temperature difference is calculated; acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold; and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed. The embodiment of the invention represents the running state of the variable frequency compressor by the temperature difference change of the compartment of the refrigerator, thereby realizing the rotation speed adjustment of the variable frequency compressor, having simple detection mode and high practicability, effectively adjusting the variable frequency compressor to be in the optimal running state, improving the working efficiency of the variable frequency compressor, further leading the refrigerator to run in the optimal refrigeration state and effectively reducing the energy consumption of the refrigerator.
Drawings
Fig. 1 is a schematic structural diagram of a refrigerator according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a working flow of a controller of a refrigerator according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a refrigerator according to a second embodiment of the present invention;
FIG. 4 is a schematic view of the operation of the controller of the refrigerator according to the second embodiment of the present invention;
FIG. 5 is a schematic view of the operation of the controller of the refrigerator according to the third embodiment of the present invention;
fig. 6 is a schematic step diagram of a method for controlling a rotation speed of an inverter compressor according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a refrigerator according to a first embodiment of the present invention; fig. 2 is a schematic view of a working flow of a controller of a refrigerator according to a first embodiment of the present invention. An embodiment of the present invention provides a refrigerator 10, including:
a refrigerator body 11 having a plurality of storage compartments 12 therein;
the variable frequency compressor 13 is arranged in the refrigerator body;
the environment temperature sensor 14 is arranged outside the refrigerator body 11 and used for detecting the environment temperature of the refrigerator in real time;
a compartment temperature sensor 15 provided in the refrigerator body 11 for detecting a compartment temperature of the storage compartment in real time;
a controller 16 electrically connected to the inverter compressor 13, the ambient temperature sensor 14 and the room temperature sensor 15, respectively, for executing steps S11 to S14:
s11, when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter; the temperature parameters include: recording the current ambient temperature detected by the ambient temperature sensor and the current compartment temperature detected by the compartment temperature sensor as a first compartment temperature, and recording the compartment temperature detected by the compartment temperature sensor as a second compartment temperature after a first preset time period;
s12, calculating the current compartment temperature difference according to the first compartment temperature and the second compartment temperature;
s13, acquiring a compartment temperature difference threshold corresponding to the current environment temperature according to a mapping relation between the pre-constructed environment temperature and the compartment temperature difference threshold;
and S14, calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed.
In the embodiment of the present invention, after the inverter refrigerator is in a refrigeration state and stably operates, the inverter compressor operates at a certain rotation speed, and the controller 16 adjusts the rotation speed of the inverter compressor in real time in response to a compressor rotation speed adjustment instruction.
Specifically, an adjustment period may be preset, and the controller performs information interaction with the temperature sensor and the compartment temperature sensor at the beginning of each adjustment period to obtain the ambient temperature T at which the refrigerator is located at the current time T1 detected by the temperature sensorhI.e. the current ambient temperature ThAcquiring the compartment temperature of the storage compartment detected by the compartment temperature sensor at the current time T1, namely, a first compartment temperature T1Then, after a first preset time period Δ T has elapsed, a room temperature detected by the room temperature sensor at the current time T2, which is T1+ Δ T, i.e., a second room temperature T is obtained2. Further, according to the first chamber temperature T1And the second compartment temperature T2Calculating the compartment temperature difference of the storage compartment within a first preset time period delta T, namely the current compartment temperature difference delta T ═ T2-T1。
It should be noted that the first preset time period may be set according to an actual application situation. Preferably, the first preset time period is set to a minute level, for example, 1-5 min. During this time interval, the ambient temperature to which the refrigerator is subjected varies only negligibly at times t1 and t 2.
In the embodiment of the invention, a mapping relation of 'environment temperature-compartment temperature difference threshold' is obtained by testing and constructing in advance, and the mapping relation is used for representing the corresponding optimal compartment temperature difference change of the storage chamber of the refrigerator at a certain environment temperature, namely further representing the optimal rotating speed of the variable frequency compressor.
As a preferred embodiment, the mapping relationship of "ambient temperature-compartment temperature difference threshold" is constructed by the following steps:
and S01, determining the environment temperature range of the refrigerator, and dividing the environment temperature range into a plurality of environment temperature intervals.
And S02, calculating the optimal operation rotating speed of the variable frequency compressor in each environment temperature interval of the refrigerator.
And S03, calculating the compartment temperature difference of the storage compartment within the first preset time when the variable frequency compressor runs at the optimal running speed in each environment temperature interval of the refrigerator.
S04, constructing a mapping relation between the environment temperature and a compartment temperature difference threshold value according to the corresponding relation between the environment temperature interval and the optimal operation rotating speed of the variable frequency compressor and the corresponding relation between the compartment temperature difference of the storage chamber and the optimal operation rotating speed of the variable frequency compressor.
Specifically, the environment temperature range of the refrigerator is predetermined and divided into a plurality of environment temperature intervals, for example, [0,5], [6,10], [11,15], [16,20], [21,25], [26,30], [31,35] (unit:. degree. C.) and the like, the refrigerator is set at any environment temperature in each environment temperature interval, the operation rotating speed of the inverter compressor is sequentially adjusted, when the refrigerator reaches an optimal energy-saving refrigeration state, the operation rotating speed of the inverter compressor in the state is determined to be the optimal operation rotating speed, and the corresponding relation between the environment temperature interval and the optimal operation rotating speed is recorded. And obtaining the corresponding relation between the environment temperature interval and the optimal operation rotating speed of the variable frequency compressor through continuous debugging.
Further, the refrigerator is set to be in each environment temperature interval, the variable frequency compressor is controlled to operate at the optimal operation rotating speed corresponding to the environment temperature interval, the compartment temperature difference of a storage chamber of the refrigerator within a first preset time length delta t is detected, and the corresponding relation between the optimal environment temperature interval and the compartment temperature difference is recorded. Therefore, the mapping relation of the environment temperature interval, the optimal operation rotating speed and the compartment temperature difference can be obtained, namely the mapping relation of the environment temperature and the compartment temperature difference threshold is constructed and obtained.
It should be noted that the mapping relationship between the ambient temperature and the compartment temperature difference threshold value established in the embodiment of the present invention may be applicable to the same type of inverter refrigerators or refrigerators configured with the same type of inverter compressors, and therefore, before the variable frequency compression leaves the factory, a variable frequency refrigerator is selected for testing, and the mapping relationship between the ambient temperature and the compartment temperature difference threshold value is established, so that the mapping relationship is applicable to all the same type of inverter refrigerators or refrigerators configured with the same type of inverter compressors, and the operation is simple and convenient, and the practicability is high.
Further, according to the current environment temperature ThAnd determining a corresponding compartment temperature difference threshold value delta T ' according to the mapping relation between the environmental temperature and the compartment temperature difference threshold value, further, after the current compartment temperature difference delta T is obtained through calculation, judging whether the current running rotating speed of the variable frequency compressor is the optimal rotating speed meeting the energy-saving condition of the refrigerator according to the comparison relation between the current compartment temperature difference delta T and the compartment temperature difference threshold value delta T ', and further adjusting the current running rotating speed of the variable frequency compressor or keeping the current running rotating speed unchanged according to the comparison relation between the current compartment temperature difference delta T and the compartment temperature difference threshold value delta T ', so that the variable frequency compressor runs at the optimal rotating speed, and the energy-saving and consumption-reducing requirements of the refrigerator are met.
As a preferred embodiment, in step S14, specifically, steps S141 to S143 perform:
and S141, when the current compartment temperature difference is larger than the compartment temperature difference threshold value, reducing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed.
And S142, when the current compartment temperature difference is smaller than the compartment temperature difference threshold value, increasing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed.
And S143, when the current compartment temperature difference is equal to the compartment temperature difference threshold value, taking the current running rotating speed of the variable frequency compressor as the adjusted rotating speed.
Specifically, according to the comparison relationship between the current compartment temperature difference Δ T and the compartment temperature difference threshold Δ T ', if Δ T > Δ T' is satisfied, it is indicated that the compartment temperature decrease speed of the storage chamber is too fast, that is, the operation rotation speed of the inverter compressor is too high, and therefore, the current operation rotation speed of the inverter compressor needs to be decreased. If Δ T < Δ T' is satisfied, it is determined that the room temperature decrease speed of the storage room is too slow, that is, the operation rotation speed of the inverter compressor is too low, and therefore, the current operation rotation speed of the inverter compressor needs to be increased. If Δ T ═ Δ T' is satisfied, it is determined that the room temperature decrease speed of the storage room meets the energy-saving operation condition of the refrigerator, that is, the inverter compressor is at the optimum operation rotation speed, and therefore, the current operation rotation speed of the inverter compressor is maintained unchanged without adjustment.
It should be noted that the preset rotation speed adjustment step length may be set according to an actual situation.
For example, the preset rotation speed adjustment step size may be determined according to a gear design of the inverter compressor. For example, if the rotation speed change of the first gear of the inverter compressor is set to be 60rpm, the preset rotation speed adjustment step is 60 rpm. When the running rotating speed of the variable frequency compressor needs to be adjusted downwards, the variable frequency compressor is reduced to run at a first gear of rotating speed, and when the running rotating speed of the variable frequency compressor needs to be increased, the variable frequency compressor is increased to run at a first gear of rotating speed.
In another embodiment, after determining the threshold value Δ T ', a threshold range of the compartment temperature difference is determined, for example, the threshold range of the compartment temperature difference is [ Δ T ' -a, Δ T ' + a ], and a is a constant. Further, when the current compartment temperature difference delta T is larger than delta T' + a, the current running rotating speed of the variable frequency compressor is adjusted downwards; when the temperature difference delta T of the current compartment is less than delta T' -a, the current running rotating speed of the variable frequency compressor is adjusted up; and when the current compartment temperature difference meets the condition that delta T '-a is not less than delta T and not more than delta T' + a, maintaining the current running rotating speed of the variable frequency compressor unchanged.
The embodiment of the invention provides a refrigerator, which comprises a variable frequency compressor, an ambient temperature sensor, a room temperature sensor and a controller, wherein the controller is used for: when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction, acquiring the current environment temperature, and calculating the current compartment temperature difference; acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold; and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed. The embodiment of the invention represents the running state of the variable frequency compressor by the temperature difference change of the compartment of the refrigerator, thereby realizing the rotation speed adjustment of the variable frequency compressor, having simple detection mode and high practicability, effectively adjusting the variable frequency compressor to be in the optimal running state, improving the working efficiency of the variable frequency compressor, further leading the refrigerator to run in the optimal refrigeration state and effectively reducing the energy consumption of the refrigerator.
Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a refrigerator according to a second embodiment of the present invention; fig. 4 is a schematic view of a working flow of a controller of a refrigerator according to a second embodiment of the present invention. The second embodiment of the present invention is further implemented on the basis of the first embodiment, and the refrigerator 20 includes:
the refrigerator body 21 is provided therein with a plurality of storage chambers 22, a variable frequency compressor 23, an ambient temperature sensor 24, a compartment temperature sensor 25, a controller 26, and a compartment door opening and closing sensor 27.
The compartment door opening and closing sensor 27 is provided in the refrigerator body for detecting the opening and closing state of the door of the storage compartment in real time; wherein the door open and close state comprises an open state and a closed state; the controller 26 is also electrically connected to the compartment door switch sensor 27.
The controller 26 is further configured to perform steps S21 to S23:
s21, acquiring the door opening and closing state detected by the compartment door opening and closing sensor in real time;
s22, if the door switch state of the storage chamber is detected to be an open state, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed, and the variable frequency compressor is controlled to run at the adjusted running rotating speed;
and S23, after the second preset time period, controlling the variable frequency compressor to operate at the operating speed before adjustment.
In the embodiment of the invention, in the process of adjusting the operation rotating speed of the inverter compressor, the use condition of a user needs to be considered, and because the temperature reduction rate of the compartment temperature is greatly changed due to the opening and closing of the storage compartment door (or the refrigerator door) when the user uses the inverter compressor, for example, the user opens the door to take articles, the use time period of the user needs to be excluded, and meanwhile, in order to ensure that the whole inverter reaches a new stable stage as soon as possible, an additional control strategy needs to be adopted according to the use time of the user.
Specifically, a compartment door opening and closing sensor 27 is provided in the refrigerator to detect a door opening and closing state of a storage compartment (or refrigerator) of the refrigerator, and the controller 26 receives the door opening and closing state in real time. When the door switch state of the storage chamber is detected to be an open state, which indicates that the refrigerator is in a stage of being used by a user at the moment, the current operation rotating speed of the variable frequency compressor is adjusted up according to a preset rotating speed adjusting step length, for example, the variable frequency compressor is increased to a first-gear rotating speed for operation. And after the variable frequency compressor runs for a second preset time, adjusting the running rotating speed of the variable frequency compressor back to the original rotating speed.
It is understood that the second preset time period may be set according to practical application conditions, for example, according to a time required for the refrigerator to reenter a stable operation state. And the second preset time length is set to be a minute level, namely, after the variable frequency compressor is increased to the first gear of rotating speed to operate for M minutes, the variable frequency compressor is controlled to reduce the first gear of operation.
As a preferred embodiment, the controller 26 is further configured to:
s24, if the door switch state of the storage chamber is detected to be the open state in the process of acquiring the temperature parameter, clearing the acquired data of the temperature parameter; and the number of the first and second groups,
s25, after the second preset time period passes, controlling the inverter compressor to operate at the running speed before adjustment, and executing again: and responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter.
In one embodiment of the present invention, on the one hand, when the controller determines that the refrigerator is in a cooling state, the controller obtains a temperature parameter at regular intervals (a preset adjustment period), and adjusts the rotation speed of the inverter compressor, which is recorded as a first adjustment strategy. On the other hand, the controller receives the door opening and closing state detected by the compartment door opening and closing sensor 27 in real time, and adjusts the rotating speed of the inverter compressor in real time according to the door opening and closing state, and the rotating speed is recorded as a second adjustment strategy. Therefore, when the controller detects that the door of the storage room is in the open state again in the process of acquiring the temperature parameter, the first adjustment strategy needs to be stopped, the operating rotating speed of the variable frequency compressor is firstly adjusted up according to the door opening and closing state, and after the refrigerator is operated to the stable refrigeration state again, the operation of acquiring the temperature parameter in response to the preset compressor rotating speed adjustment instruction is executed again, namely the first adjustment strategy is executed again.
Fig. 5 is a schematic view of a working flow of the controller of the refrigerator according to the third embodiment of the present invention. The third embodiment of the invention is further implemented on the basis of the first and second embodiments, and provides a complete work flow of the controller.
In the embodiment of the present invention, the refrigerator performs defrosting once at regular intervals, usually about 2 days, and at this time, the inverter compressor is in a shutdown state. And when the refrigerator is in a stable refrigeration state, the variable frequency compressor also has a corresponding start-stop period, and when the refrigeration of each storage chamber is finished, the variable frequency compressor reaches a primary stop point.
For example, the mapping relationship between the "ambient temperature and the compartment temperature difference threshold" is stored in advance in the controller of the refrigerator before the refrigerator leaves the factory. And when the refrigerator is in a power-on state, running a preset compressor rotating speed adjusting instruction. The controller detects whether the refrigerator is in a defrosting stage or not and whether the refrigerator reaches a stop point of the variable frequency compressor or not, if not, the current running rotating speed of the variable frequency compressor is maintained, and if yes, whether the variable frequency compressor is started or not is continuously detected, and whether the refrigerator reaches a stable refrigerating state or not is detected. When the refrigerator is in a stable refrigeration state, if the door of the storage chamber is detected to be in an open state, the operating speed of the variable frequency compressor is increased by one gear and the variable frequency compressor operates for a second preset time, if the door of the storage chamber is detected to be in a closed state, the temperature parameters (the current environment temperature, the first chamber temperature and the second chamber temperature) are collected at regular intervals, if the door of the storage chamber is detected to be in the open state in the collection process, the collected temperature parameters are emptied, and the operating speed of the variable frequency compressor is increased by one gear and the variable frequency compressor operates for the second preset time and then the temperature parameters are collected again.
And calculating the current compartment temperature difference delta T according to the acquired first compartment temperature and the second compartment temperature, and acquiring a corresponding compartment temperature difference threshold delta T ' according to the mapping relation between the current environment temperature and the ' environment temperature-compartment temperature difference threshold '. And adjusting the running speed of the variable frequency compressor according to the comparison relation between the current compartment temperature difference delta T and the compartment temperature difference threshold delta T'.
And if the requirement of delta T > delta T' is met, reducing the rotation speed of the variable frequency compressor to be in first gear operation. And if the delta T < delta T' is met, the variable frequency compressor is increased to operate at a first-gear rotating speed. And if the requirement of delta T is delta T', maintaining the current running rotating speed of the variable frequency compressor unchanged without adjustment.
And further, detecting whether the variable frequency compressor reaches a stop condition, if so, returning to the step of detecting whether the variable frequency compressor enters the starting state and whether the refrigerator reaches a stable refrigeration state. And detecting whether the refrigerator reaches a defrosting condition, if so, controlling the refrigerator to execute a defrosting operation, and returning to execute whether the refrigerator is in a defrosting stage at the moment and whether the refrigerator reaches a stop point of the variable frequency compressor, so that the real-time working condition of the refrigerator is detected, and the running rotating speed of the variable frequency compressor is adjusted according to the real-time working condition of the refrigerator.
The embodiment of the invention provides a refrigerator, which comprises a variable frequency compressor, an environment temperature sensor, a compartment door switch sensor and a controller, wherein the controller is used for: when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction, acquiring the current environment temperature, and calculating the current compartment temperature difference; acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold; and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed. And if the door switch state of the storage chamber is detected to be an open state, the current running speed of the variable frequency compressor is increased according to a preset speed adjusting step length, and the variable frequency compressor is controlled to run at the adjusted running speed for a second preset time. The embodiment of the invention represents the running state of the variable frequency compressor by the temperature difference change of the compartment of the refrigerator, thereby realizing the adjustment of the rotating speed of the variable frequency compressor, having simple detection mode and high practicability, effectively considering the influence of the refrigerator on the running working condition of the refrigerator when the refrigerator is in the use stage of a user, adding an additional strategy for adjusting the running rotating speed of the variable frequency compressor, effectively adjusting the variable frequency compressor to be in the optimal running state, improving the working efficiency of the variable frequency compressor, further leading the refrigerator to run in the optimal refrigeration state and effectively reducing the energy consumption of the refrigerator.
Referring to fig. 6, a schematic step diagram of a method for controlling a rotational speed of an inverter compressor according to a fourth embodiment of the present invention is shown. The embodiment of the invention provides a rotating speed control method of an inverter compressor, which is suitable for refrigeration products such as refrigerators provided with the inverter compressor, and the control method is implemented through steps S41 to S44:
s41, when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter; the temperature parameters include: recording the current ambient temperature of the refrigerator, the current compartment temperature of a storage compartment inside the refrigerator as a first compartment temperature, and recording the compartment temperature of the storage compartment inside the refrigerator after a first preset time period as a second compartment temperature;
s42, calculating the current compartment temperature difference according to the first compartment temperature and the second compartment temperature;
s43, acquiring a compartment temperature difference threshold corresponding to the current environment temperature according to a mapping relation between the pre-constructed environment temperature and the compartment temperature difference threshold;
and S44, calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed.
Preferably, step S44 specifically includes:
s441, when the current compartment temperature difference is larger than the compartment temperature difference threshold value, reducing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed;
s442, when the current compartment temperature difference is smaller than the compartment temperature difference threshold value, increasing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed;
s443, when the current compartment temperature difference is equal to the compartment temperature difference threshold, taking the current operation rotating speed of the variable frequency compressor as the adjusted rotating speed.
Preferably, the mapping relation between the environmental temperature and the compartment temperature difference threshold is constructed by the following steps:
s01, determining the environment temperature range of the refrigerator, and dividing the environment temperature range into a plurality of environment temperature intervals;
s02, calculating the optimal operation rotating speed of the variable frequency compressor in each environment temperature interval of the refrigerator;
s03, calculating the compartment temperature difference of the storage compartment within the first preset time when the variable frequency compressor runs at the optimal running speed in each environment temperature interval of the refrigerator;
s04, constructing a mapping relation between the environment temperature and a compartment temperature difference threshold value according to the corresponding relation between the environment temperature interval and the optimal operation rotating speed of the variable frequency compressor and the corresponding relation between the compartment temperature difference of the storage chamber and the optimal operation rotating speed of the variable frequency compressor.
As a preferred embodiment, the control method further includes:
s45, acquiring the door opening and closing state of the storage room in real time; the door switch state comprises an opening state and a closing state;
s46, if the door switch state of the storage chamber is detected to be an open state, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed, and the variable frequency compressor is controlled to run at the adjusted running rotating speed;
and S47, after the second preset time period, controlling the variable frequency compressor to operate at the operating speed before adjustment.
Preferably, if it is detected that the door opening and closing state of the storage room is an open state in the process of acquiring the temperature parameter, the control method further includes:
s48, clearing the acquired data of the temperature parameter; and the number of the first and second groups,
s49, after the second preset time period passes, controlling the inverter compressor to operate at the running speed before adjustment, and executing again: and responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter.
It should be noted that, the control method for the inverter compressor according to the embodiment of the present invention is the same as all the process steps executed by the controller in the refrigerator according to any one of the first to third embodiments, and the working principles and beneficial effects of the two are in one-to-one correspondence, so that the detailed description is omitted.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A refrigerator, characterized by comprising:
the refrigerator comprises a refrigerator body, a storage box and a control device, wherein a plurality of storage chambers are arranged inside the refrigerator body;
the variable frequency compressor is arranged in the refrigerator body;
the environment temperature sensor is arranged outside the refrigerator body and used for detecting the environment temperature of the refrigerator in real time;
the compartment temperature sensor is arranged in the refrigerator body and used for detecting the compartment temperature of the storage chamber in real time;
the controller is respectively and electrically connected with the variable frequency compressor, the environment temperature sensor and the room temperature sensor and is used for:
when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter; the temperature parameters include: recording the current ambient temperature detected by the ambient temperature sensor and the current compartment temperature detected by the compartment temperature sensor as a first compartment temperature, and recording the compartment temperature detected by the compartment temperature sensor as a second compartment temperature after a first preset time period;
calculating the current compartment temperature difference according to the first compartment temperature and the second compartment temperature;
acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold;
and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed.
2. The refrigerator according to claim 1, wherein the calculating the adjusted operating speed according to the comparison relationship between the current compartment temperature difference and the compartment temperature difference threshold value specifically comprises:
when the current compartment temperature difference is larger than the compartment temperature difference threshold value, reducing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed;
when the current compartment temperature difference is smaller than the compartment temperature difference threshold value, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length so as to obtain the adjusted running rotating speed;
and when the current compartment temperature difference is equal to the compartment temperature difference threshold value, taking the current running rotating speed of the variable frequency compressor as the adjusted rotating speed.
3. The refrigerator of claim 1, wherein the mapping relationship between the ambient temperature and the compartment temperature difference threshold is constructed by:
determining the environment temperature range of the refrigerator, and dividing the environment temperature range into a plurality of environment temperature intervals;
calculating the optimal running rotating speed of the variable frequency compressor in each environment temperature interval of the refrigerator;
calculating the compartment temperature difference of the storage compartment within the first preset time when the variable frequency compressor runs at the optimal running speed in each environment temperature interval of the refrigerator;
and constructing a mapping relation between the environment temperature and a compartment temperature difference threshold according to the corresponding relation between the environment temperature interval and the optimal operation rotating speed of the variable frequency compressor and the corresponding relation between the compartment temperature difference of the storage chamber and the optimal operation rotating speed of the variable frequency compressor.
4. The refrigerator of claim 1, wherein the refrigerator further comprises a compartment door opening and closing sensor; the compartment door switch sensor is arranged in the refrigerator body and used for detecting the door switch state of the storage compartment in real time; the door switch state comprises an opening state and a closing state; the controller is also electrically connected with the compartment door switch sensor;
the controller is further configured to:
acquiring the door opening and closing state detected by the compartment door opening and closing sensor in real time;
if the door opening and closing state of the storage chamber is detected to be an opening state, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed, and the variable frequency compressor is controlled to run at the adjusted running rotating speed;
and after the second preset time period, controlling the variable frequency compressor to operate at the operating speed before adjustment.
5. The refrigerator of claim 4, wherein the controller is further configured to:
if the door switch state of the storage chamber is detected to be an open state in the process of acquiring the temperature parameter, clearing the acquired data of the temperature parameter; and the number of the first and second groups,
after the second preset time period, after the variable frequency compressor is controlled to operate at the running speed before adjustment, the following steps are executed again: and responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter.
6. A method for controlling the rotating speed of an inverter compressor, which is characterized in that the inverter compressor is arranged in a refrigerator, comprises the following steps:
when the refrigerator is in a refrigerating state, responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter; the temperature parameters include: recording the current ambient temperature of the refrigerator, the current compartment temperature of a storage compartment inside the refrigerator as a first compartment temperature, and recording the compartment temperature of the storage compartment inside the refrigerator after a first preset time period as a second compartment temperature;
calculating the current compartment temperature difference according to the first compartment temperature and the second compartment temperature;
acquiring a compartment temperature difference threshold corresponding to the current ambient temperature according to a mapping relation between the pre-constructed ambient temperature and the compartment temperature difference threshold;
and calculating the adjusted running rotating speed according to the comparison relation between the current compartment temperature difference and the compartment temperature difference threshold value, and controlling the variable frequency compressor to run at the adjusted running rotating speed.
7. The method for controlling a rotation speed of an inverter compressor according to claim 6, wherein the calculating an adjusted operating rotation speed according to the comparison relationship between the current compartment temperature difference and the compartment temperature difference threshold value specifically comprises:
when the current compartment temperature difference is larger than the compartment temperature difference threshold value, reducing the current running rotating speed of the variable frequency compressor according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed;
when the current compartment temperature difference is smaller than the compartment temperature difference threshold value, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length so as to obtain the adjusted running rotating speed;
and when the current compartment temperature difference is equal to the compartment temperature difference threshold value, taking the current running rotating speed of the variable frequency compressor as the adjusted rotating speed.
8. A method for controlling the rotation speed of an inverter compressor according to claim 6, wherein the mapping relationship between the ambient temperature and the compartment temperature difference threshold is constructed by the following steps:
determining the environment temperature range of the refrigerator, and dividing the environment temperature range into a plurality of environment temperature intervals;
calculating the optimal running rotating speed of the variable frequency compressor in each environment temperature interval of the refrigerator;
calculating the compartment temperature difference of the storage compartment within the first preset time when the variable frequency compressor runs at the optimal running speed in each environment temperature interval of the refrigerator;
and constructing a mapping relation between the environment temperature and a compartment temperature difference threshold according to the corresponding relation between the environment temperature interval and the optimal operation rotating speed of the variable frequency compressor and the corresponding relation between the compartment temperature difference of the storage chamber and the optimal operation rotating speed of the variable frequency compressor.
9. A method of controlling a rotational speed of an inverter compressor according to claim 6, further comprising:
acquiring the door opening and closing state of the storage room in real time; the door switch state comprises an opening state and a closing state;
if the door opening and closing state of the storage chamber is detected to be an opening state, the current running rotating speed of the variable frequency compressor is increased according to a preset rotating speed adjusting step length to obtain the adjusted running rotating speed, and the variable frequency compressor is controlled to run at the adjusted running rotating speed;
and after the second preset time period, controlling the variable frequency compressor to operate at the operating speed before adjustment.
10. The method for controlling the rotation speed of the inverter compressor according to claim 9, wherein if it is detected that the door opening and closing state of the storage compartment is an open state in the process of acquiring the temperature parameter, the method further comprises:
clearing the acquired data of the temperature parameter; and the number of the first and second groups,
after the second preset time period, after the variable frequency compressor is controlled to operate at the running speed before adjustment, the following steps are executed again: and responding to a preset compressor rotating speed adjusting instruction to obtain a temperature parameter.
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| CN114646167A (en) * | 2022-03-15 | 2022-06-21 | 海信（山东）冰箱有限公司 | Refrigerator and control method of variable frequency compressor thereof |
| CN114857835A (en) * | 2022-06-02 | 2022-08-05 | 珠海格力电器股份有限公司 | Refrigerator and control method |
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| CN117469869A (en) * | 2023-12-26 | 2024-01-30 | 珠海格力电器股份有限公司 | Compressor control method and device and refrigerator |
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