CN117469869A - Compressor control method and device and refrigerator - Google Patents
Compressor control method and device and refrigerator Download PDFInfo
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- CN117469869A CN117469869A CN202311798781.9A CN202311798781A CN117469869A CN 117469869 A CN117469869 A CN 117469869A CN 202311798781 A CN202311798781 A CN 202311798781A CN 117469869 A CN117469869 A CN 117469869A
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- 238000012544 monitoring process Methods 0.000 claims description 4
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Classifications
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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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable 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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- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a compressor control method, a compressor control device and a refrigerator. The method is applied to the refrigerator with the compressor, and comprises the following steps: when the ambient temperature and the phase current meet the first preset condition, controlling the compressor to execute quick temperature pulling operation; after the time length of executing the rapid temperature pulling operation of the compressor or the temperature of the refrigerating room meets a second preset condition, controlling the compressor to run in an energy-saving mode; and after the temperature of the refrigerating chamber is reduced to the first temperature range, the rotating speed of the compressor is finely adjusted according to the temperature change trend of the refrigerating chamber. The invention can avoid the excessively high temperature of the refrigerating room under high load, ensure the refrigerating effect, simultaneously avoid excessively high energy consumption and save energy.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a compressor control method and device and a refrigerator.
Background
In the existing control scheme of the refrigerator compressor, the running rotating speed of the compressor at the current ambient temperature is preset according to the ambient temperature, and the compressor is stopped when the running rotating speed reaches the target temperature in the refrigerator compartment. And when the temperature of the refrigerating compartment reaches the starting point again, restarting the compressor, and thus starting and stopping the circulation control. The problem with this conventional control method is that it takes a long time for the compressor to re-establish equilibrium after shutdown. If the ambient temperature is high, the temperature of the refrigerated compartment will continue to rise before the compressor reestablishes equilibrium, which is detrimental to food preservation.
Aiming at the problems that the temperature is slowly reduced and food is easy to deteriorate when the compressor starts to start at high ambient temperature in the prior art, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a compressor control method, a device and a refrigerator, which are used for solving the problems that in the prior art, when a compressor starts to be started at a high ambient temperature, the temperature is slowly reduced, and food is easy to deteriorate.
In order to solve the above technical problems, the present invention provides a compressor control method applied to a refrigerator having a compressor, the method comprising:
when the ambient temperature and the phase current meet the first preset condition, controlling the compressor to execute quick temperature pulling operation;
after the time length of executing the rapid temperature pulling operation of the compressor or the temperature of the refrigerating room meets a second preset condition, controlling the compressor to run in an energy-saving mode;
and after the temperature of the refrigerating chamber is reduced to the first temperature range, the rotating speed of the compressor is finely adjusted according to the temperature change trend of the refrigerating chamber.
Further, the first preset condition includes:
the ambient temperature is greater than a preset high temperature threshold, and the phase current after the compressor stably operates is greater than a preset current threshold.
Further, controlling the compressor to perform a rapid warm-up operation includes:
determining the fastest temperature pulling rotating speed according to the current phase current and the ambient temperature of the compressor and controlling the compressor to operate according to the fastest temperature pulling rotating speed;
the corresponding relation between the fastest temperature pulling rotating speed and the phase current of the compressor under different environment temperatures is preset.
Further, the second preset condition includes:
the compressor may perform the rapid warm-up operation for a period of time exceeding a first preset period of time and/or the cold compartment temperature may reach the first preset temperature.
Further, controlling the energy-saving operation of the compressor includes:
the fastest temperature pulling rotating speed is redetermined according to the current phase current and the ambient temperature of the current compressor;
taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, taking the rotating speed when the temperature of the refrigerating chamber stops decreasing as a cut-off rotating speed, and searching the lowest power rotating speed;
and controlling the compressor to operate at the lowest power rotating speed.
Further, the searching for the lowest power rotation speed with the newly determined fastest temperature pulling rotation speed as an initial rotation speed and the rotation speed when the temperature of the refrigerating chamber stops decreasing as a cut-off rotation speed comprises the following steps:
taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, controlling the rotating speed of the compressor to drop by a first adjustment amount every second preset time length, and obtaining the power of the refrigerator at each rotating speed;
after the temperature of the refrigerating chamber stops decreasing, the corresponding rotating speed when the power of the refrigerator reaches the minimum value is obtained and is taken as the lowest rotating speed of the power.
Further, when controlling the energy-saving operation of the compressor, the method further comprises:
monitoring phase current of the compressor;
and if the variation of the phase current of the compressor is larger than the preset variation, triggering to redetermine the fastest temperature pulling rotating speed according to the current phase current of the compressor and the ambient temperature, and searching the lowest power rotating speed by taking the redetermined fastest temperature pulling rotating speed as the initial rotating speed.
Further, fine-tuning the compressor speed according to the temperature trend of the refrigerated compartment, comprising:
judging whether the change trend of the temperature of the refrigerating compartment is rising or falling;
if so, controlling the rotation speed of the compressor to be increased by a second adjustment amount;
if so, controlling the rotation speed of the compressor to be reduced by a second adjustment amount;
wherein the second adjustment amount does not exceed a preset value.
Further, the method further comprises:
and after the temperature of the refrigerating room is reduced to the second temperature interval, controlling the compressor to operate according to the rotating speed which ensures that the temperature change rate of the refrigerating room is minimum.
The present invention also provides a compressor control device applied to a refrigerator having a compressor, the device comprising:
the environment temperature detection module is used for detecting the environment temperature;
the phase current detection module is used for detecting the phase current of the compressor;
the compartment temperature detection module is used for detecting the temperature of the refrigerating compartment;
the control module is used for controlling the compressor to execute quick temperature pulling operation when the ambient temperature and the phase current meet a first preset condition; after the time length of executing the rapid temperature pulling operation of the compressor or the temperature of the refrigerating room meets a second preset condition, controlling the compressor to run in an energy-saving mode; after the temperature of the refrigerating room enters the first temperature interval, the rotating speed of the compressor is finely adjusted according to the temperature change trend of the refrigerating room.
The invention also provides a refrigerator, which comprises the compressor control device and is applied to the compressor control method.
The present invention also provides a computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the above-mentioned compressor control method.
By applying the technical scheme of the invention, the intelligent control method is provided, when the load of the compressor is high, the compressor is controlled to execute the rapid temperature pulling operation, after the load of the compressor is rapidly reduced, the compressor is controlled to run in an energy-saving mode, and after the load of the compressor is stabilized, the rotating speed of the compressor is finely adjusted, so that the temperature of a refrigerating room under high load can be prevented from being too high, the refrigerating effect is ensured, meanwhile, the energy consumption is prevented from being too high, and the energy is saved.
Drawings
FIG. 1 is a flow chart of a compressor control method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of controlling a compressor according to another embodiment of the present invention;
fig. 3 is a block diagram of a compressor control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be understood that although the terms first, second, etc. may be used in embodiments of the present invention to describe temperature intervals, these temperature intervals should not be limited by these terms. These terms are only used to distinguish between different temperature intervals. For example, a first temperature interval may also be referred to as a second temperature interval, and similarly, a second temperature interval may also be referred to as a first temperature interval, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such element.
Alternative embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
In the existing control scheme of the refrigerator compressor, the running rotating speed of the compressor at the current ambient temperature is preset according to the ambient temperature, and the compressor is stopped when the running rotating speed reaches the target temperature in the refrigerator compartment. And when the temperature of the refrigerating compartment reaches the starting point again, restarting the compressor, and thus starting and stopping the circulation control. The problem with this conventional control method is that it takes a long time for the compressor to re-establish equilibrium after shutdown. If the ambient temperature is high, the temperature of the refrigerated compartment will continue to rise before the compressor reestablishes equilibrium, which is detrimental to food preservation.
In view of the above technical problems, the present embodiment provides a compressor control method applied to a refrigerator with a compressor, and fig. 1 is a flowchart of a compressor control method according to an embodiment of the present invention, as shown in fig. 1, where the compressor control method includes:
s101, controlling the compressor to execute quick temperature pulling operation when the ambient temperature and the phase current meet a first preset condition.
The environment temperature and the phase current jointly reflect the load condition of the compressor, and if the environment temperature and the phase current of the compressor meet the first preset conditions, the operation load of the compressor is higher at the moment, the compressor needs to be controlled to execute the operation of quickly pulling the temperature as soon as possible, the temperature is quickly reduced, and the temperature in a refrigerating chamber of the refrigerator is prevented from being too high.
And S102, controlling the compressor to run in an energy-saving mode after the duration of executing the rapid temperature pulling operation or the temperature of the refrigerating room meets a second preset condition.
The time length of executing the quick warm-up operation or the temperature of the refrigerating room satisfies a second preset condition, which indicates that the warm-up operation is completed, the warm-up operation is an emergency measure for quickly reducing the temperature, the consumed electric energy is high, the method is only suitable for the condition that the load of the compressor is large, if the quick warm-up operation is executed for a long time, the energy consumption of the refrigerator is increased, therefore, after the time length of executing the quick warm-up operation or the temperature of the refrigerating room satisfies a certain condition, the compressor is indicated to be in a high-load state, and at the moment, the compressor can be controlled to enter an energy-saving operation stage in order to save the electric energy.
And S103, after the temperature of the refrigerating chamber is reduced to a first temperature interval, the rotating speed of the compressor is finely adjusted according to the temperature change trend of the refrigerating chamber.
After the compressor is operated for a period of time in an energy-saving mode, the temperature of the refrigerating room is reduced to a preset range, and the load of the compressor is low at the moment, so that the rotating speed of the compressor can be finely adjusted according to the change condition of the temperature sink, and the temperature can enter a target interval.
According to the compressor control method, an intelligent control scheme is provided, when the load of the compressor is high, the compressor is controlled to execute rapid temperature pulling operation, after the load of the compressor is rapidly reduced, the compressor is controlled to operate in an energy-saving mode, after the load of the compressor is stable, the rotating speed of the compressor is finely adjusted, the temperature of a refrigerating room under high load can be prevented from being too high, the refrigerating effect is ensured, meanwhile, the energy consumption is prevented from being too high, and the energy is saved.
Since the higher the ambient temperature, the higher the load of the compressor, the higher the phase current of the compressor, and the higher the load of the compressor, in order to accurately judge the load condition of the compressor, the first preset conditions include: the ambient temperature is greater than a preset high temperature threshold, and the phase current after the compressor stably operates is greater than a preset current threshold. Whether the compressor stably runs or not can be judged through the running time of the compressor.
To achieve rapid cooling of the refrigerated compartment temperature, controlling the compressor to perform a rapid warm-up operation includes: determining the fastest temperature pulling rotating speed according to the current phase current and the ambient temperature of the compressor and controlling the compressor to operate according to the fastest temperature pulling rotating speed; the corresponding relation between the fastest temperature pulling rotating speed and the phase current of the compressor under different environment temperatures is preset.
In the implementation, the relationship between the fastest rotating speed and the phase current at different temperatures can be drawn and stored in the main board of the refrigerator.
In order to improve operability, a mode of interval sampling can be adopted to construct various high-temperature and high-load working conditions of the refrigerator, namely, a characteristic environment temperature is selected every a ℃ in a certain temperature range. And selecting a characteristic phase current every bA within the detected phase current range. The fastest and fastest temperature-pulling rotating speed of the refrigerator compressor under any combination of characteristic ambient temperature and characteristic phase current is determined through experiments and is plotted into a table so as to conveniently select the running rotating speed under corresponding running working conditions.
It should be noted that, because the sampling mode is adopted, the ambient temperature may be between two characteristic ambient temperatures, the phase current may also be between two characteristic phase currents, if the ambient temperature detected during actual operation is between two adjacent characteristic ambient temperatures, the larger characteristic ambient temperature is selected as the current characteristic ambient temperature, and if the phase current detected during actual operation is between two adjacent characteristic phase currents, the larger characteristic phase current is selected as the current characteristic phase current.
As described above, in order to achieve the saving of electric power, the rapid warm-up operation may be ended when the duration of the rapid warm-up of the compressor reaches a certain value or when the temperature of the refrigerating compartment is reduced to a certain extent, and therefore, the second preset condition includes: the compressor may perform the rapid warm-up operation for a period of time exceeding a first preset period of time and/or the cold compartment temperature may reach the first preset temperature.
As described above, the fastest temperature-pulling rotation speed is the rotation speed at which the temperature of the refrigerating compartment drops fastest and the rotation speed with highest energy consumption under a certain combination of the ambient temperature and the phase current, so the rotation speed corresponding to the current ambient temperature and the phase current can be taken as the initial rotation speed, the initial rotation speed of the power-saving operation is gradually reduced, the minimum power rotation speed is searched, and the energy-saving operation of the compressor is controlled to accurately determine the minimum power rotation speed, which comprises: the fastest temperature pulling rotating speed is redetermined according to the current phase current and the ambient temperature of the current compressor; taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, taking the rotating speed when the temperature of the refrigerating chamber stops decreasing as a cut-off rotating speed, and searching the lowest power rotating speed; and controlling the compressor to operate at the lowest power rotating speed. Specifically, the method for searching the lowest power rotating speed by taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed and taking the rotating speed when the temperature of the refrigerating chamber stops decreasing as a cut-off rotating speed comprises the following steps: taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, controlling the rotating speed of the compressor to drop by a first adjustment amount every second preset time length, and obtaining the power of the refrigerator at each rotating speed; after the temperature of the refrigerating chamber stops decreasing, the corresponding rotating speed when the power of the refrigerator reaches the minimum value is obtained and is taken as the lowest rotating speed of the power.
If the refrigerator is started, and the stored object is stored or taken away in the energy-saving operation process, the load of the compressor is changed greatly, the lowest power rotating speed is found inaccurately according to the previous initial rotating speed, and after the load of the compressor is changed greatly, the phase current of the compressor is changed greatly, and when the energy-saving operation of the compressor is controlled, the method further comprises: monitoring phase current of the compressor; if the change amount of the phase current of the compressor is larger than the preset change amount, the load of the compressor is indicated to change greatly, the fastest temperature pulling rotating speed is triggered to be redetermined according to the current phase current of the compressor and the ambient temperature, and the fastest temperature pulling rotating speed is redetermined to be the initial rotating speed to find the lowest power rotating speed.
After the temperature of the refrigerating room continues to be reduced to a first preset interval, the refrigerating temperature is shown to be relatively close to a target interval, at the moment, the rotating speed of the compressor is only required to be adjusted according to the increase or the decrease of the temperature of the refrigerating room, and the rotating speed of the compressor is finely adjusted according to the change trend of the temperature of the refrigerating room, and the method comprises the following steps:
judging whether the change trend of the temperature of the refrigerating compartment is rising or falling; if so, controlling the rotation speed of the compressor to be increased by a second adjustment amount; if so, controlling the rotation speed of the compressor to be reduced by a second adjustment amount. Because of the fine tuning of the rotational speed at this stage, the second adjustment amount is smaller than the first adjustment amount described above, and the second adjustment amount does not exceed a preset value, for example, 50rpm.
In the prior art, after the temperature of the refrigerating compartment reaches the target interval, in order to avoid frequent start and stop of the compressor, the method further comprises: after the temperature of the refrigerating compartment is reduced to the second temperature interval, the compressor is controlled to operate at the rotation speed which ensures that the temperature change rate of the refrigerating compartment is minimum, wherein the second temperature interval is the target temperature interval, if the temperature of the target refrigerating compartment is T0, the second temperature interval is (T0-DeltaT 1, T0 < + > DeltaT 1), and if the temperature exceeds the second temperature interval, the step S103 is repeated.
Example 2
The present embodiment provides another compressor control method, and fig. 2 is a flowchart of a compressor control method according to another embodiment of the present invention, as shown in fig. 2, the method includes:
s1, after the refrigerator is powered on and operated, responding to a user instruction, and controlling the refrigerator to enter an intelligent control mode.
S2, acquiring the environment temperature T, judging whether the environment temperature T is greater than a high temperature threshold Tth or not, if so, executing the step S3, and if not, repeating the step S2.
S3, after the operation of the compressor exceeds the time t1, collecting the amplitude I of the phase current of the compressor.
S4, judging whether the amplitude value I of the phase current is greater than a preset current threshold I0, if so, executing the step S5, and if not, returning to the step S3.
When the ambient temperature exceeds T0, collecting the magnitude of the single-phase current amplitude when the compressor is operated, wherein T0 is a high ambient temperature selected in advance, and can be determined according to the actual operating ambient temperature range of the refrigerator, and in one example, the magnitude is 32 ℃; after the compressor runs for a period of time t1, the compressor runs stably, and the magnitude of the load is estimated qualitatively according to the current value because the magnitude of the phase current is proportional to the magnitude of the load.
And S5, controlling the compressor to run at the fastest temperature-pulling rotating speed determined under the current environment temperature and the phase current, and executing the step S6 after the temperature of the compressor reaches the preset temperature T1 (namely the first preset temperature) or the temperature of the refrigerating compartment is T2 (namely the first preset time) at the fastest temperature-pulling rotating speed.
The method can adopt an interval sampling mode to construct various high-temperature and high-load working conditions which can possibly run the refrigerator, namely, a characteristic environment temperature is selected every a ℃ in a certain temperature range. And selecting a characteristic phase current every bA within the detected phase current range. The fastest temperature pulling rotating speed of the refrigerator compressor under any combination of characteristic ambient temperature and characteristic phase current is determined through experiments and is plotted into a table so that the operation rotating speed can be selected under corresponding operation working conditions.
It should be noted that, because the sampling mode is adopted, the ambient temperature may be between two characteristic ambient temperatures, the phase current may also be between two characteristic phase currents, if the ambient temperature detected during actual operation is between two adjacent characteristic ambient temperatures, the larger characteristic ambient temperature is selected as the current characteristic ambient temperature, and if the phase current detected during actual operation is between two adjacent characteristic phase currents, the larger characteristic phase current is selected as the current characteristic phase current.
And S6, re-selecting the current detected characteristic ring temperature and characteristic current, selecting the fastest pulling temperature rotating speed determined in advance as the running rotating speed, reducing the rotating speed by a first adjustment amount (for example, 100 rpm) every time t3 (namely, the second preset time period), acquiring the power of the refrigerator in the time period, determining the rotating speed when the running power of the compressor is minimum as the lowest power rotating speed on the premise of ensuring that the temperature of the refrigerating chamber is continuously reduced, and controlling the compressor to run at the lowest power rotating speed.
S7, detecting the phase current of the compressor once at intervals of delta t, calculating the conversion quantity of the phase current I delta i I= |ik+1-ik I, judging whether I delta i I > i1 is true, returning to the step S6 if yes, and executing the step S8 if no.
S8, when the room temperature is within the range of (T0, T0+ [ delta ] T1) DEG C, controlling the rotation speed of the compressor to be reduced by a second adjustment amount (for example, 50 rpm) every T4 time, and calculating the change delta ] T2 of the temperature of the refrigerating compartment every time the time T5 passes.
S9, calculating the variation delta T2 of the temperature of the refrigerating compartment every time the time period T5 passes, judging whether delta T2<0 is met, returning to the step S8 if yes, and executing the step S10 if no.
And S10, controlling the rotation speed of the compressor to increase by a second adjustment amount every interval t 4.
S11, after the range of the temperature of the refrigerating compartment enters a section (T0-DeltaT 1, T0+ DeltaT1), the refrigerating compartment operates according to the rotating speed with the minimum change rate of the temperature of the refrigerating compartment, and the temperature of the refrigerating compartment is maintained.
S12, judging whether the temperature of the refrigerating compartment exceeds the interval (T0-DeltaT 1, T0+ DeltaT1), if so, returning to the step S8, and if so, returning to the step S11.
The intelligent control mode of the present embodiment divides the compressor operation mode into three phases. The first stage is a quick temperature pulling stage, namely, the temperature is quickly pulled by using the highest temperature pulling rotating speed, so that the overall load of the refrigerator is reduced as soon as possible; the second stage is an energy-saving temperature pulling stage, and the temperature is continuously pulled by using the current ring temperature and the energy-saving rotating speed under load; the third stage is a temperature maintenance stage, a temperature fluctuation range of the compartment is set, and the running rotation speed of the compressor is finely adjusted in real time according to the temperature change rate of the compartment of the refrigerator, so that the compressor continuously runs at a lower running frequency without stopping, the energy loss and the temperature fluctuation of the compartment caused by frequent starting and stopping of the compressor are avoided while the accurate temperature control of the compartment is ensured, and the overall energy efficiency of the refrigerator is further improved.
Example 3
The present embodiment provides a compressor control device applied to a refrigerator having a compressor, fig. 3 is a block diagram of a mechanism of the compressor control device according to an embodiment of the present invention, and as shown in fig. 3, the compressor control device includes:
an ambient temperature detection module 10 for detecting an ambient temperature;
a phase current detection module 20 for detecting a phase current of the compressor;
a compartment temperature detection module 30 for detecting a temperature of the refrigerating compartment;
a control module 40 for controlling the compressor to perform a rapid warm-up operation when the ambient temperature and the phase current satisfy a first preset condition; after the time length of executing the rapid temperature pulling operation of the compressor or the temperature of the refrigerating room meets a second preset condition, controlling the compressor to run in an energy-saving mode; after the temperature of the refrigerating room enters the first temperature interval, the rotating speed of the compressor is finely adjusted according to the temperature change trend of the refrigerating room.
The environment temperature and the phase current jointly reflect the load condition of the compressor, and if the environment temperature and the phase current of the compressor meet the first preset conditions, the operation load of the compressor is higher at the moment, the compressor needs to be controlled to execute the operation of quickly pulling the temperature as soon as possible, the temperature is quickly reduced, and the temperature in a refrigerating chamber of the refrigerator is prevented from being too high.
The time length of executing the quick warm-up operation or the temperature of the refrigerating room satisfies a second preset condition, which indicates that the warm-up operation is completed, the warm-up operation is an emergency measure for quickly reducing the temperature, the consumed electric energy is high, the method is only suitable for the condition that the load of the compressor is large, if the quick warm-up operation is executed for a long time, the energy consumption of the refrigerator is increased, therefore, after the time length of executing the quick warm-up operation or the temperature of the refrigerating room satisfies a certain condition, the compressor is indicated to be in a high-load state, and at the moment, the compressor can be controlled to enter an energy-saving operation stage in order to save the electric energy.
After the compressor is operated for a period of time in an energy-saving mode, the temperature of the refrigerating room is reduced to a preset range, and the load of the compressor is low at the moment, so that the rotating speed of the compressor can be finely adjusted according to the change condition of the temperature sink, and the temperature can enter a target interval.
The compressor control device of this embodiment, through control module 40, when the load of compressor is higher, control the compressor and carry out quick warm-up operation, after the load of compressor reduces fast, control the energy-conserving operation of compressor, after the load of compressor stabilizes, fine setting compressor rotational speed can avoid the high temperature of cold-stored room under the high load, guarantees cold-stored effect, avoids the energy consumption too high simultaneously, the energy saving.
Since the higher the ambient temperature, the higher the load of the compressor, the higher the phase current of the compressor, and the higher the load of the compressor, in order to accurately judge the load condition of the compressor, the first preset conditions include: the ambient temperature is greater than a preset high temperature threshold, and the phase current after the compressor stably operates is greater than a preset current threshold. Whether the compressor stably runs or not can be judged through the running time of the compressor.
In order to achieve the rapid cooling of the temperature of the refrigerating compartment, the control module 40 controls the compressor to perform the rapid temperature-pulling operation, specifically, the following operations are performed: determining the fastest temperature pulling rotating speed according to the current phase current and the ambient temperature of the compressor and controlling the compressor to operate according to the fastest temperature pulling rotating speed; the corresponding relation between the fastest temperature pulling rotating speed and the phase current of the compressor under different environment temperatures is preset.
In the implementation, the relationship between the fastest rotating speed and the phase current at different temperatures can be drawn and stored in the main board of the refrigerator.
In order to improve operability, a mode of interval sampling can be adopted to construct various high-temperature and high-load working conditions of the refrigerator, namely, a characteristic environment temperature is selected every a ℃ in a certain temperature range. And selecting a characteristic phase current every bA within the detected phase current range. The fastest and fastest temperature-pulling rotating speed of the refrigerator compressor under any combination of characteristic ambient temperature and characteristic phase current is determined through experiments and is plotted into a table so as to conveniently select the running rotating speed under corresponding running working conditions.
It should be noted that, because the sampling mode is adopted, the ambient temperature may be between two characteristic ambient temperatures, the phase current may also be between two characteristic phase currents, if the ambient temperature detected during actual operation is between two adjacent characteristic ambient temperatures, the larger characteristic ambient temperature is selected as the current characteristic ambient temperature, and if the phase current detected during actual operation is between two adjacent characteristic phase currents, the larger characteristic phase current is selected as the current characteristic phase current.
As described above, in order to achieve the saving of electric power, the rapid warm-up operation may be ended when the duration of the rapid warm-up of the compressor reaches a certain value or when the temperature of the refrigerating compartment is reduced to a certain extent, and therefore, the second preset condition includes: the compressor may perform the rapid warm-up operation for a period of time exceeding a first preset period of time and/or the cold compartment temperature may reach the first preset temperature.
As described above, the fastest temperature-pulling rotation speed is the rotation speed at which the temperature in the refrigerating compartment decreases fastest and is also the rotation speed with the highest energy consumption under a certain combination of the ambient temperature and the phase current, so the current ambient temperature and the rotation speed corresponding to the phase current can be taken as the initial rotation speed, the initial rotation speed of the energy-saving operation is gradually reduced, the lowest power rotation speed is searched, and in order to accurately determine the lowest power rotation speed, the control module 40 specifically performs the following operations when controlling the energy-saving operation of the compressor: the fastest temperature pulling rotating speed is redetermined according to the current phase current and the ambient temperature of the current compressor; taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, taking the rotating speed when the temperature of the refrigerating chamber stops decreasing as a cut-off rotating speed, and searching the lowest power rotating speed; and controlling the compressor to operate at the lowest power rotating speed. Specifically, the control module 40 performs the following operations when searching for the lowest power rotation speed, taking the newly determined fastest temperature pulling rotation speed as an initial rotation speed and taking the rotation speed when the temperature of the refrigerating compartment stops decreasing as a cut-off rotation speed: taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, controlling the rotating speed of the compressor to drop by a first adjustment amount every second preset time length, and obtaining the power of the refrigerator at each rotating speed; after the temperature of the refrigerating chamber stops decreasing, the corresponding rotating speed when the power of the refrigerator reaches the minimum value is obtained and is taken as the lowest rotating speed of the power.
If in the process of energy-saving operation, the refrigerator is used for being started, stored objects are stored or taken away, then the load of the compressor can be changed greatly, at the moment, the lowest power rotating speed can be inaccurately found according to the previous initial rotating speed, after the load of the compressor can be changed greatly, the phase current of the compressor can be changed greatly, and the phase current detection module is further used for: monitoring phase current of the compressor; when the variation of the phase current of the compressor is larger than the preset variation, the control module 40 triggers the redetermining of the fastest temperature pulling rotating speed according to the current phase current of the compressor and the ambient temperature, and searches the lowest power rotating speed by taking the redetermined fastest temperature pulling rotating speed as the initial rotating speed.
After the temperature of the refrigerating compartment continues to decrease to the first preset interval, it indicates that the refrigerating temperature is relatively close to the target interval, and at this time, only the rotation speed of the compressor needs to be adjusted according to the increase or decrease of the temperature of the refrigerating compartment, the control module 40 specifically performs the following operations when fine-adjusting the rotation speed of the compressor according to the trend of the temperature change of the refrigerating compartment: judging whether the change trend of the temperature of the refrigerating compartment is rising or falling; if so, controlling the rotation speed of the compressor to be increased by a second adjustment amount; if so, controlling the rotation speed of the compressor to be reduced by a second adjustment amount. The second adjustment amount is smaller than the first adjustment amount because of the fine adjustment of the rotational speed at this stage.
In the prior art, when the temperature of the refrigerating compartment reaches the target interval, in order to avoid frequent start and stop of the compressor, the control module 40 is further configured to: after the temperature of the refrigerating room is reduced to a second temperature interval, the compressor is controlled to operate according to the rotating speed which ensures the minimum temperature change rate of the refrigerating room, wherein the second temperature interval is a target temperature interval, if the temperature of the target refrigerating room is T0, the second temperature interval is (T0-DeltaT 1, T0 < + > DeltaT 1), and if the temperature exceeds the second temperature interval, the control module 40 triggers the fine adjustment of the rotating speed of the compressor according to the temperature change trend of the refrigerating room.
Example 4
The embodiment provides a refrigerator, which comprises the compressor control device and is used for avoiding the excessively high temperature of a refrigerating room under high load, ensuring the refrigerating effect, avoiding excessively high energy consumption and saving energy.
Example 5
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the compressor control method of the above-described embodiments.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A compressor control method applied to a refrigerator having a compressor, the method comprising:
when the ambient temperature and the phase current meet the first preset condition, controlling the compressor to execute quick temperature pulling operation;
after the time length of executing the rapid temperature pulling operation of the compressor or the temperature of the refrigerating room meets a second preset condition, re-determining the fastest temperature pulling rotating speed according to the current phase current of the compressor and the ambient temperature; taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, taking the rotating speed when the temperature of the refrigerating chamber stops decreasing as a cut-off rotating speed, and searching the lowest power rotating speed; controlling the compressor to run according to the lowest power rotating speed;
and after the temperature of the refrigerating chamber is reduced to the first temperature range, the rotating speed of the compressor is finely adjusted according to the temperature change trend of the refrigerating chamber.
2. The method of claim 1, wherein the first preset condition comprises:
the ambient temperature is greater than a preset high temperature threshold, and the phase current after the compressor stably operates is greater than a preset current threshold.
3. The method of claim 1, wherein controlling the compressor to perform a rapid warm-up operation comprises:
determining the fastest temperature pulling rotating speed according to the current phase current and the ambient temperature of the compressor and controlling the compressor to operate according to the fastest temperature pulling rotating speed;
the corresponding relation between the fastest temperature pulling rotating speed and the phase current of the compressor under different environment temperatures is preset.
4. The method of claim 1, wherein the second preset condition comprises:
the compressor may perform the rapid warm-up operation for a period of time exceeding a first preset period of time and/or the cold compartment temperature may reach the first preset temperature.
5. The method of claim 4, wherein searching for the lowest power speed with the redetermined fastest pull-up speed as an initial speed and the speed at which the temperature in the refrigerated compartment stops dropping as a cutoff speed, comprises:
taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, controlling the rotating speed of the compressor to drop by a first adjustment amount every second preset time length, and obtaining the power of the refrigerator at each rotating speed;
after the temperature of the refrigerating chamber stops decreasing, the corresponding rotating speed when the power of the refrigerator reaches the minimum value is obtained and is taken as the lowest rotating speed of the power.
6. The method of claim 4, wherein controlling the compressor to run in energy saving mode further comprises:
monitoring phase current of the compressor;
and if the variation of the phase current of the compressor is larger than the preset variation, triggering to redetermine the fastest temperature pulling rotating speed according to the current phase current of the compressor and the ambient temperature, and searching the lowest power rotating speed by taking the redetermined fastest temperature pulling rotating speed as the initial rotating speed.
7. The method of claim 1, wherein fine-tuning the compressor speed based on a trend in changes in the temperature of the refrigerated compartment, comprising:
judging whether the change trend of the temperature of the refrigerating compartment is rising or falling;
if so, controlling the rotation speed of the compressor to be increased by a second adjustment amount;
if so, controlling the rotation speed of the compressor to be reduced by a second adjustment amount;
wherein the second adjustment amount does not exceed a preset value.
8. The method according to claim 1, wherein the method further comprises:
and after the temperature of the refrigerating room is reduced to the second temperature interval, controlling the compressor to operate according to the rotating speed which ensures that the temperature change rate of the refrigerating room is minimum.
9. A compressor control apparatus applied to a refrigerator having a compressor, the apparatus comprising:
the environment temperature detection module is used for detecting the environment temperature;
the phase current detection module is used for detecting the phase current of the compressor;
the compartment temperature detection module is used for detecting the temperature of the refrigerating compartment;
the control module is used for controlling the compressor to execute quick temperature pulling operation when the ambient temperature and the phase current meet a first preset condition; after the time length of executing the rapid temperature pulling operation of the compressor or the temperature of the refrigerating room meets a second preset condition, re-determining the fastest temperature pulling rotating speed according to the current phase current of the compressor and the ambient temperature; taking the redetermined fastest temperature pulling rotating speed as an initial rotating speed, taking the rotating speed when the temperature of the refrigerating chamber stops decreasing as a cut-off rotating speed, and searching the lowest power rotating speed; controlling the compressor to run according to the lowest power rotating speed; after the temperature of the refrigerating room enters the first temperature interval, the rotating speed of the compressor is finely adjusted according to the temperature change trend of the refrigerating room.
10. A refrigerator comprising the compressor control apparatus of claim 9 and applying the method of any one of claims 1 to 9.
11. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1 to 8.
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