CN114234545A - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN114234545A CN114234545A CN202010942110.5A CN202010942110A CN114234545A CN 114234545 A CN114234545 A CN 114234545A CN 202010942110 A CN202010942110 A CN 202010942110A CN 114234545 A CN114234545 A CN 114234545A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims description 37
- 230000015654 memory Effects 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005057 refrigeration Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 13
- 238000001816 cooling Methods 0.000 description 12
- 239000000796 flavoring agent Substances 0.000 description 7
- 235000019634 flavors Nutrition 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- 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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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention provides a refrigerator and a control method thereof, wherein the control method comprises the following steps: acquiring the running power of a compressor of the refrigerator; and B: acquiring a preset power threshold, and calculating a difference value between the running power and the power threshold; and C: and adjusting the running state of the refrigerator according to the difference value. By monitoring the running power of the compressor of the refrigerator and analyzing the running power and the preset power threshold, the running state of the refrigerator can be correspondingly adjusted according to the difference between the running power and the power threshold, so that the problem of overpower of the compressor of the refrigerator can be reduced or avoided, and the running reliability of the refrigerator is improved.
Description
Technical Field
The invention relates to refrigeration equipment, in particular to a refrigerator and a control method thereof.
Background
A refrigerator is a storage device capable of producing low temperatures. Most refrigerators are compression type refrigerators, and a compressor is used for applying work to a refrigeration system to realize refrigeration.
In the prior art, when the internal structure of a compressor of a partial refrigerator breaks down, the running power of the compressor may be increased, if the compressor runs in an over-power state for a long time, the working life of the compressor is easily reduced, the compressor may be damaged, and even a safety accident may occur.
Therefore, how to reduce or avoid the over-power problem of the compressor of the refrigerator and improve the reliability of the refrigerator operation becomes a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
An object of the present invention is to provide a refrigerator and a control method thereof which at least partially solve the above problems.
A further object of the present invention is to reduce or avoid the occurrence of compressor over-power problems in refrigerators and to improve the reliability of operation of the refrigerator.
Another further object of the present invention is to simplify the control logic of the refrigerator.
The invention further aims to improve the adjustment precision of the refrigerator and optimize the adjustment effect.
It is still a further object of the present invention to ensure the cooling effect of the refrigerator as much as possible when overpower protection is performed.
It is still a further object of the present invention to extend the operational life of the compressor of a refrigerator.
According to an aspect of the present invention, there is provided a control method of a refrigerator, including: step A: acquiring the running power of a compressor of the refrigerator; and B: acquiring a preset power threshold, and calculating a difference value between the running power and the power threshold; and C: and adjusting the running state of the refrigerator according to the difference value.
Optionally, step C comprises: judging whether the difference value is smaller than a preset difference value threshold value and larger than zero; and if so, controlling the compressor to reduce the frequency, detecting the press rotating speed of the compressor, and further adjusting the running state of the refrigerator according to the press rotating speed of the compressor.
Optionally, the step of further adjusting the operation state of the refrigerator according to the press rotation speed of the compressor comprises: judging whether the rotating speed of a compressor of the compressor is lower than a preset rotating speed threshold value or not; if so, acquiring the running power of the compressor again, and judging whether the difference value between the running power of the compressor and the power threshold value is smaller than a preset difference value threshold value and larger than zero; and if so, controlling the compressor to stop.
Optionally, when the compressor is controlled to frequency down, step C further includes: the fan rotating speed of an air supply fan of the refrigerator is improved; and/or increasing the temperature at the start point and the temperature at the shut down point of the compartment in the refrigerator.
Optionally, step C comprises: judging whether the difference value is greater than or equal to a preset difference value threshold value; and if so, controlling the compressor to stop.
Optionally, after controlling the compressor to stop, step C further comprises: and controlling the compressor to start the standby frequency conversion plate and controlling the compressor to start and operate.
Optionally, after controlling the compressor to stop, step C further comprises: acquiring the freshness grade of an inner chamber of the refrigerator; and adjusting the cold quantity supplied to the inner chamber of the refrigerator according to the freshness grade.
Optionally, step C comprises: if the difference value is not greater than zero, obtaining the running record of the press of the refrigerator; and adjusting the running state of the refrigerator according to the running record of the press.
Optionally, the step of adjusting the operation state of the refrigerator according to the press operation record comprises: judging whether the compressor is subjected to over-frequency reduction according to the press operation record; if so, further acquiring the press rotating speed of the compressor; and controlling the compressor to operate according to the acquired compressor rotating speed, continuously detecting the operating power of the compressor, and if the difference value between the operating power of the compressor and the power threshold value is always smaller than zero in a set time period, increasing the compressor rotating speed of the compressor.
According to another aspect of the present invention, there is also provided a refrigerator including: a processor and a memory, the memory having stored therein a control program for implementing the control method according to any one of the above when the control program is executed by the processor.
According to the refrigerator and the control method thereof, the running power of the compressor of the refrigerator is monitored, the running power is analyzed with the preset power threshold, and the running state of the refrigerator can be correspondingly adjusted according to the difference between the running power and the power threshold, so that the problem of overpower of the compressor of the refrigerator can be reduced or avoided, and the running reliability of the refrigerator is improved.
Further, the refrigerator and the control method thereof of the invention control the compressor to reduce the frequency and further adjust the operation state of the refrigerator according to the rotating speed of the compressor when the difference between the operation power and the power threshold is smaller than the preset difference threshold and larger than zero, and directly control the compressor to stop when the difference between the operation power and the power threshold is larger than the preset difference threshold, and correspondingly adjust the operation state of the refrigerator according to the operation record of the compressor when the difference between the operation power and the power threshold is smaller than zero.
Furthermore, the refrigerator and the control method thereof can adopt different adjusting schemes according to the difference value between the running power of the compressor and the preset difference value threshold value, have strong pertinence, improve the adjusting precision of the refrigerator and optimize the adjusting effect.
Furthermore, the refrigerator and the control method thereof can control the compressor to start the standby frequency conversion plate after controlling the compressor to stop, control the compressor to start to operate, and adjust the cold quantity supplied to the compartment according to the preservation grade of the compartment in the refrigerator, so that the refrigerator can ensure the refrigeration effect of the refrigerator as much as possible while performing over-power protection, and improve the preservation capacity of the refrigerator.
Furthermore, according to the refrigerator and the control method thereof, at least one spare frequency conversion plate can be preset in the compressor, and the compressor can be controlled to start the spare frequency conversion plate after the compressor is controlled to stop, so that the working life of the compressor in the refrigerator is prolonged, and the maintenance difficulty of the compressor in the refrigerator is reduced.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic block diagram of a refrigerator according to one embodiment of the present invention;
FIG. 2 is a schematic view of a refrigerator according to one embodiment of the present invention;
fig. 3 is an internal circuit diagram of a compressor in a refrigerator according to an embodiment of the present invention;
fig. 4 is a schematic view of a control method of a refrigerator according to one embodiment of the present invention;
fig. 5 is a control flowchart of a refrigerator according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic block diagram of a refrigerator 10 according to one embodiment of the present invention. The refrigerator 10 may generally include a cabinet 110, a refrigeration system 200, a processor 130, and a memory 140. The cabinet 110 may be internally formed with a compartment 111, a machine compartment, and an evaporator compartment.
Fig. 2 is a schematic diagram of a refrigerator 10 according to one embodiment of the present invention. The number and temperature zones of the compartments 111 can be set arbitrarily according to actual needs. In this embodiment, the number of the compartments 111 may be plural.
The refrigeration system 200 may be a compression refrigeration system 200. The refrigeration system 200 may include a compressor, a condenser, a throttling device, and an evaporator. The compressor may be provided in the machine room, and the evaporator may be provided in the evaporator room. The machine room may be disposed at the bottom rear side of the cabinet 110. The evaporator chamber may be disposed on the back, top, side, or bottom of the compartment 111.
In the operating state of the compressor, the refrigerant is subjected to heat radiation and condensation when flowing through the condenser, and is subjected to heat absorption and evaporation when flowing through the evaporator. The refrigeration system 200 may utilize the heat of the refrigerant in the evaporator to change phase to provide cooling to the compartment 111. The evaporator may provide cooling to the compartment 111 by direct cooling and/or air cooling. The refrigerator 10 can set a cooling temperature by a user. The refrigeration system 200 operates at a user-indicated refrigeration temperature.
Fig. 3 is an internal circuit diagram of a compressor in the refrigerator 10 according to one embodiment of the present invention.
In this embodiment, the compressor may be an inverter compressor, which may include an inverter controller and a compressor body 230. The inverter controller may include a plurality of inverter boards, for example, may include a main inverter board 210 and at least one backup inverter board 220.
Fig. 3 shows a PWM + interface 131 and a PWM-interface 132 of the processor 130, a PWM + interface 211 and a PWM-interface 212 of the main frequency conversion board 210, a PWM + interface 221 and a PWM-interface 222 of the standby frequency conversion board 220, a live line 201 and a neutral line 202, a plurality of controllers 203, a U-phase power 204, a V-phase power 205 and a W-phase power 206, and a U-interface 231, a V-interface 232 and a W-interface 233 of the compressor body 230.
When the compressor leaves a factory, the main frequency conversion board 210 may establish a communication connection with a control device (e.g., a main control board) of the refrigerator 10, that is, the main frequency conversion board 210 may serve as a working frequency conversion board of the compressor, so that the main frequency conversion board 210 may process an input electrical signal according to a communication instruction issued by the main control board to generate an alternating current with adjustable voltage or frequency. The standby inverter board 220 is used to replace the main inverter board 210 when the main inverter board 210 fails, and functions as a new operating inverter board to restore the function of the compressor. That is, when the main frequency conversion board 210 has a fault, the main frequency conversion board can be disconnected from the main control board and the compressor body 230, and the standby frequency conversion board 220 can be connected with the main control board and the compressor body 230 as a substitute, thereby becoming a working frequency conversion board of the compressor. The main frequency conversion board 210 and the standby frequency conversion board 220 may be respectively provided with a feature identifier, and by identifying the feature identifier of the working frequency conversion board, it may be determined whether the working frequency conversion board is the main frequency conversion board 210 (or the standby frequency conversion board 220).
By pre-arranging at least one spare inverter board 220 in the compressor, the service life of the compressor in the refrigerator 10 is prolonged, and the maintenance difficulty of the compressor in the refrigerator 10 is reduced.
The processor 130 and the memory 140 may form a control device of the refrigerator 10, which may be a main control board. Wherein the memory 140 stores therein a control program 141, and the control program 141 is used to implement the control method of the refrigerator 10 according to any one of the following embodiments when executed by the processor 130. The processor 130 may be a Central Processing Unit (CPU), or a digital processing unit (DSP), etc. The memory 140 is used to store programs executed by the processor 130. The memory 140 may be any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 140 may also be a combination of various memories 140. Since the control program 141 is executed by the processor 130 to implement the processes of the following method embodiments and achieve the same technical effects, the detailed description is omitted here to avoid repetition.
Fig. 4 is a schematic diagram of a control method of the refrigerator 10 according to one embodiment of the present invention. The control method of the present embodiment may be applied to both the air-cooled refrigerator 10 and the direct-cooled refrigerator 10 or the mix-cooled refrigerator 10. The control method of the present embodiment will be described in detail below by taking the air-cooled refrigerator 10 as an example, and those skilled in the art should be fully capable of expanding on other types of refrigerators 10 without any examples given herein based on the understanding of the following embodiments. The air-cooled refrigerator 10 of this embodiment may further include an air supply fan for causing the heat exchange airflow after exchanging heat with the evaporator to flow through the compartment 111 and then through the evaporator. Each compartment 111 may have a damper for allowing the flow of heat exchange gas into the compartment 111.
The control method of the refrigerator 10 may generally include:
step a, the operating power of the compressor of the refrigerator 10 is acquired. The running power of the compressor can be calculated by detecting the bus voltage and the bus current of the working frequency conversion plate. For example, the operating power may be the product of the bus voltage and the bus current of the operating inverter board. Since the method for detecting the bus voltage and the bus current of the operating inverter board is well known to those skilled in the art, it will not be described in detail herein.
And B, acquiring a preset power threshold, and calculating a difference value between the running power and the power threshold. The preset power threshold may be a safety protection value of the operation power of the compressor. When the operating power reaches or exceeds the preset power threshold, the compressor is at a greater risk of being overpowered, and a safety risk may be created by overpowering. The magnitude of the power threshold may be preset according to the operation performance of the compressor. The power threshold is used as a judgment standard to judge whether the running power of the compressor has a large running risk or not, so that the risk coefficient of the compressor with overpower can be reduced, and an obviously better protection effect is achieved.
And step C, adjusting the running state of the refrigerator 10 according to the difference value, wherein the running state of the refrigerator 10 can be adjusted by adjusting the running parameters of the refrigerator 10. For example, the operating parameters of the refrigerator 10 may be the operating frequency and the press rotation speed of the compressor, the cooling capacity supply amount of each compartment 111, the start point temperature, the off point temperature, the fan rotation speed of the blower fan, and the like.
By using the above method, the refrigerator 10 and the control method thereof of the present embodiment can adjust the operation state of the refrigerator 10 according to the difference between the operation power and the power threshold by monitoring the operation power of the compressor of the refrigerator 10 and analyzing the operation power and the preset power threshold, which can reduce or avoid the occurrence of the over-power problem of the compressor of the refrigerator 10 and improve the operation reliability of the refrigerator 10.
The step C may include: and judging whether the difference value is smaller than a preset difference value threshold value and larger than zero, if so, controlling the compressor to reduce the frequency, detecting the press rotating speed of the compressor, and further adjusting the running state of the refrigerator 10 according to the press rotating speed of the compressor.
When the difference between the operating power and the power threshold is smaller than the preset difference threshold, it indicates that although the operating power exceeds the power threshold, the compressor has a certain risk coefficient of overpower, but the risk coefficient of overpower of the compressor is still small. In order to take account of the refrigeration effect of the refrigerator 10, the compressor can be controlled to continue to operate at the moment, and the running power of the compressor is reduced by controlling the compressor to reduce, so that the refrigeration effect of the refrigerator 10 is ensured, meanwhile, the reduction of the overpower risk coefficient is facilitated, and multiple purposes are achieved.
For example, to determine the difference threshold, a plurality of compressors of the same type may be controlled to operate at a plurality of different powers, and the operating states of the plurality of compressors may be analyzed to perform a plurality of tests, respectively, so as to obtain a corresponding relationship between the powers and the over-power risk coefficients, where the risk coefficients may be probabilities of over-powers occurring to the compressors, for example, a ratio between the number of times of over-powers occurring when the compressors operate at a certain power and a total number of tests. The power corresponding to any risk coefficient with the risk coefficient ranging from 0% to 30% can be selected as the reference power, and the reference power can be a preset power threshold. The difference threshold may be determined using a power corresponding to another higher risk factor (e.g., 40-60%), which may be obtained, for example, by calculating the difference between the power corresponding to the risk factor and a reference power. In this embodiment, the power threshold may be any value within a range of 170-190W, for example, 180W, and the difference threshold may be any value within a range of 10-30W, for example, 20W.
The step of controlling the compressor down frequency may comprise: the compressor is controlled to perform the down-conversion in stages according to a preset down-conversion rule, for example, the down-conversion can be performed once every set time interval. The preset frequency reduction rule can specify the size of a set time interval and the frequency reduction amplitude of each frequency reduction, the set time interval can be any value within the range of 2-5 min, for example, 3min, and the frequency reduction amplitude of each frequency reduction can be specified to any value within the range of reducing the rotating speed of the compressor by 100-300 revolutions per frequency reduction, for example, 200 revolutions.
When controlling the compressor to down frequency, step C may further include: increasing the fan speed of the supply fan of the refrigerator 10 and/or increasing the temperature of the compartment 111 in the refrigerator 10 at the start point and the temperature at the shut down point. The fan speed of the air supply fan may be preset to a plurality of air volume levels, and when the fan speed of the air supply fan of the refrigerator 10 is increased, the fan speed may be increased by one air volume level. After the compressor reduces the frequency, the refrigerating capacity is reduced, the air flow speed can be increased by increasing the fan rotating speed of the air supply fan, the heat exchange capacity is increased, more refrigerating capacity is supplied to the compartment 111, the refrigerating effect is favorably ensured, and the compartment 111 keeps a good fresh-keeping atmosphere. When the temperature of the start-up point and the temperature of the shutdown point of each chamber 111 are increased, the temperature of the start-up point and the temperature of the shutdown point of each chamber 111 can be increased by one level, for example, by 1 to 3 ℃. By increasing the temperature of the starting point and the temperature of the shutdown point of the compartment 111, the compressor can be shut down in advance, the starting time of the compressor can be delayed, the rest time of the compressor can be prolonged, frequent starting is avoided, the auxiliary compressor can restore the functions of the compressor, and the probability of the compressor breaking down is reduced.
In some alternative embodiments, the refrigerator 10 may also have a sterilizing odor elimination module for treating the heat exchange air stream flowing therethrough to reduce the bacteria content and odor concentration in the heat exchange air stream. Because air supply fan's fan rotational speed when improving, can accelerate the air current speed of flow, improve the degerming and remove flavor efficiency, therefore, when control compressor falls the frequency, can also judge whether the degerming removes flavor module and is in operating condition, if, then can remove the operating duration that flavor module was removed in the degerming according to air supply fan's fan rotational speed adjustment degerming, for example, when air supply fan's fan rotational speed improves a gear, can reduce a gear with the operating duration that the degerming removed the flavor module, this has both guaranteed good degerming and has removed the flavor effect, can practice thrift the energy consumption again.
When the compressor is controlled to reduce the frequency, the compressor rotating speed of the compressor can be continuously detected. The step of further adjusting the operation state of the refrigerator 10 according to the press rotation speed of the compressor may include: and judging whether the rotating speed of the compressor is lower than a preset rotating speed threshold value, if so, acquiring the operating power of the compressor again, judging whether the difference value between the operating power of the compressor and the power threshold value is smaller than a preset difference value threshold value and larger than zero, and if so, controlling the compressor to stop.
The preset rotation speed threshold may be preset according to the performance parameters of the compressor and the magnitude of the power threshold, and may be any value within the range of 2200 to 2600 rpm, for example, 2400 rpm. According to the corresponding relation between the rotating speed of the compressor and the operating power, when the compressor is in a normal working state, the rotating speed of the compressor corresponds to a reasonable numerical range of the operating power, if the rotating speed of the compressor is lower than a preset rotating speed threshold value and a difference value between the operating power of the compressor and the power threshold value is still smaller than the difference threshold value and larger than zero, the fact that the numerical value of the rotating speed of the compressor does not correspond to the numerical value of the operating power is indicated, the compressor is in a fault state, and at the moment, the compressor is controlled to stop, so that the fault can be prevented from further worsening, and loss is reduced. After the compressor is controlled to stop, the LED lamp of the working frequency conversion plate can be controlled to flicker according to the preset times, so that a user is warned that the compressor is in an over-power protection state.
In the step C, when the compressor is controlled to reduce the frequency, if the rotating speed of the compressor is already lower than the preset rotating speed threshold and the difference between the operating power of the compressor and the power threshold is smaller than zero, it indicates that the value of the rotating speed of the compressor corresponds to the value of the operating power, and the compressor is still in a normal working state, but there is still a risk of power overflow, at this time, the compressor may be controlled to operate according to the currently obtained rotating speed of the compressor, and the operating power of the compressor is continuously detected, and if the difference between the operating power of the compressor and the power threshold is always smaller than zero within the set time period, the rotating speed of the compressor may be increased. The set time period here may be a preset first set time period, and may be any value within a range of 10 to 30min, for example, 20 min. The obtained press rotating speed refers to the press rotating speed when the press rotating speed is detected to be lower than a preset rotating speed threshold value.
The compressor speed of the compressor can also be detected and recorded before the compressor is controlled to be frequency-reduced.
The step C may include: and judging whether the difference value is greater than or equal to a preset difference value threshold value, and if so, controlling the compressor to stop. Under the condition that the difference value between the running power and the power threshold value is larger than the preset difference value threshold value, the compressor is indicated to have a higher over-power risk coefficient, and for the sake of safety, the compressor is controlled to stop, so that the damage can be stopped in time, and the compressor and the whole refrigerator 10 are protected.
If the previous working frequency conversion plate of the compressor is the main frequency conversion plate 210, after the compressor is controlled to stop, the step of adjusting the operation state of the refrigerator 10 according to the difference value further includes: and controlling the compressor to start the standby frequency conversion board 220 and controlling the compressor to start to operate. That is, the standby inverter board 220 is switched to the operating inverter board, and the compressor is turned on again for operation, for example, the compressor may be controlled to be turned on again after the shutdown time of the compressor reaches a preset shutdown duration. In some optional embodiments, if the previous working inverter board of the compressor is the standby inverter board 220, the working inverter board does not need to be switched at this time, the compressor does not need to be restarted, the compressor is in a fault state, and the working inverter board can be controlled to flash according to a preset number of times, so as to warn a user that the compressor is in the fault state.
In some embodiments, if the previous working inverter board of the compressor is the main inverter board 210, the compressor may be controlled to enable the standby inverter board 220 after the compressor is controlled to stop, and the compressor is controlled to start up, and if the previous working inverter board of the compressor is the standby inverter board 220, the compressor may be warned to be in a failure state after the compressor is controlled to stop, and the cooling capacity supplied to each compartment 111 may be adjusted according to the freshness grade of each compartment 111 in the refrigerator 10.
By using the above method, after the refrigerator 10 of this embodiment controls the compressor to stop, the compressor can be controlled to start the standby frequency conversion board 220, and the compressor is controlled to start running, and the cooling capacity supplied to each compartment 111 can be adjusted according to the freshness grade of each compartment 111 in the refrigerator 10, so that the refrigerator 10 of this embodiment can ensure the refrigeration effect of the refrigerator 10 as much as possible while performing overpower protection, and the freshness keeping capability of the refrigerator 10 is improved.
In some optional embodiments, for step C, the condition that the compressor activates the standby inverter board 220 may also be changed, for example, if the difference between the operating power and the power threshold is greater than or equal to a preset difference threshold, the compressor may be controlled to stop first, after the compressor stops for a set time period (which may be 5 to 10min, for example, 7min), the compressor is controlled to start repeatedly, after the compressor starts repeatedly, the difference between the operating power and the power threshold may be detected again, if the detected difference is greater than or equal to the preset difference threshold, the compressor is controlled to stop, and if the number of times of the compressor starts repeatedly exceeds a preset number of times of starting and stopping (for example, the number may be 1 to 10 times, for example, 5 times), the compressor may be controlled to activate the standby inverter board 220.
In this embodiment, after controlling the compressor to stop, step C may further include: the freshness grade of the compartment 111 in the refrigerator 10 is obtained, and the cooling capacity supplied to the compartment 111 in the refrigerator 10 is adjusted according to the freshness grade. The freshness level may refer to a priority of the freshness requirements of the compartment 111, with a higher freshness level indicating a higher freshness requirement of the compartment 111.
In the case where the number of compartments 111 is plural, the freshness level of each compartment 111 can be obtained at the same time. The step of obtaining the freshness level of the compartment 111 in the refrigerator 10 may include: the method includes the steps of obtaining historical temperature records of all compartments 111 in the refrigerator 10, analyzing the historical temperature records of all compartments 111 in the refrigerator 10, obtaining temperature change values of all compartments 111 in the refrigerator 10 in a second set time period, and determining a freshness grade according to the temperature change values of all compartments 111 in the refrigerator 10. The second set time period may be any value within a range of 2-10 min, for example, 5min, when the ventilation gas flow starts to supply cooling to the compartment 111.
In the step of adjusting the amount of cold supplied to the compartments 111 in the refrigerator 10 according to the freshness level, the opening degree of the damper of each compartment 111 may be adjusted, for example, the damper of the compartment 111 having the heat preservation priority lower than the preset priority threshold may be closed, or the opening degree of the damper of the compartment 111 having the heat preservation priority lower than the preset priority threshold may be reduced, and meanwhile, the opening degree of the damper of the compartment 111 having the heat preservation priority higher than the preset priority threshold may be increased, so that the heat exchange air flow is preferentially supplied to the compartment 111 having the higher freshness level, which is beneficial to optimizing the resource configuration, so that the refrigerator 10 may improve the utilization efficiency of the remaining amount of cold.
By using the above method, after the refrigerator 10 of the embodiment controls the compressor to stop, the compressor can be controlled to start the standby frequency conversion board 220, the compressor is controlled to start to operate, and the cooling capacity supplied to each compartment 111 can be adjusted according to the preservation level of each compartment 111 in the refrigerator 10, so that the refrigeration effect of the refrigerator 10 can be ensured as much as possible while the refrigerator 10 performs overpower protection, and the preservation capability of the refrigerator 10 is improved.
The step C may further include: if the difference is not greater than zero, obtaining a press operation record of the refrigerator 10, and adjusting the operation state of the refrigerator 10 according to the press operation record.
The step of adjusting the operation state of the refrigerator 10 according to the press operation record includes: judging whether the compressor is subjected to over-frequency reduction or not according to the compressor operation record, if so, further acquiring the compressor rotating speed of the compressor, controlling the compressor to operate according to the acquired compressor rotating speed, continuously detecting the operating power of the compressor, and if the difference value between the operating power of the compressor and the power threshold value is always smaller than zero in a set time period, improving the compressor rotating speed of the compressor. The set time period here may be a preset first set time period, and may be any value within a range of 10 to 30min, for example, 20 min.
The obtained rotating speed of the compressor is the rotating speed of the compressor when the rotating speed of the compressor is detected to be lower than a preset rotating speed threshold value, and the current rotating speed of the compressor is low, so that the risk coefficient of the compressor with over-power risk can be further reduced by controlling the compressor to operate according to the current rotating speed of the compressor in a set time period and detecting the working state of the compressor, and the compressor can recover the function of the compressor.
In the step of increasing the compressor rotation speed of the compressor, the compressor rotation speed may be restored to the compressor rotation speed before the compressor down-conversion is controlled, that is, the compressor rotation speed of the compressor detected and recorded before the compressor down-conversion is controlled.
By using the method, the refrigerator 10 of the embodiment can obtain the adjustment scheme of the refrigerator 10 only by monitoring the difference between the running power and the power threshold, the process is simple, the control logic of the refrigerator 10 is simplified, different adjustment schemes can be adopted according to the difference between the running power of the compressor and the preset difference threshold, the pertinence is strong, the adjustment precision of the refrigerator 10 is improved, and the adjustment effect is optimized.
Fig. 5 is a control flowchart of the refrigerator 10 according to one embodiment of the present invention.
In step S502, the operating power of the compressor of the refrigerator 10 is acquired.
Step S504, a preset power threshold is obtained, and a difference between the operating power and the power threshold is calculated.
Step S506, determining whether the difference is smaller than a preset difference threshold and larger than zero, if yes, performing step S508, and if not, performing step S520.
And step S508, controlling the compressor to reduce the frequency, and detecting the compressor rotating speed of the compressor. When the compressor is controlled to reduce the frequency, the fan speed of the blower fan of the refrigerator 10 may be increased, and/or the temperature of the start point and the temperature of the shutdown point of the compartment 111 in the refrigerator 10 may be increased. When controlling the compressor and falling the frequency, can also judge whether degerming removes flavor module and is in operating condition, if, then can be according to the fan rotational speed adjustment degerming of air supply fan removes flavor module's operating time length.
Step S510, determining whether the compressor rotation speed of the compressor is lower than a preset rotation speed threshold, if so, executing step S512, otherwise, returning to execute step S502.
In step S512, the operating power of the compressor is obtained again, and the difference between the operating power of the compressor and the power threshold is calculated.
Step S514, determining whether a difference between the operating power of the compressor and the power threshold is smaller than a preset difference threshold and larger than zero, if so, performing step S516, and if not, performing step S524.
And step S516, controlling the compressor to stop.
In step S518, the compressor is controlled to start the standby frequency conversion board 220 and control the compressor to start up when the working frequency conversion board is the main frequency conversion board 210. If the working inverter board is the standby inverter board 220, the compressor cannot start the standby inverter board 220, and after the compressor is stopped, a user can be warned that the compressor is in a fault state. After the compressor is controlled to stop, particularly under the condition that the compressor cannot start the standby frequency conversion plate 220, the freshness grade of the compartment 111 in the refrigerator 10 can be obtained, and the cold quantity supplied to the compartment 111 in the refrigerator 10 can be adjusted according to the freshness grade.
In step S520, it is determined whether a difference between the operating power of the compressor and the power threshold is greater than a preset difference threshold, if so, step S516 is executed, and if not, step S522 is executed.
In step S522, in the case that the difference between the operating power of the compressor and the power threshold is not greater than zero, a press operation record of the refrigerator 10 is acquired.
And step 524, further acquiring the press rotating speed of the compressor under the condition that the compressor is determined to be subjected to over-frequency reduction according to the press operation record.
And step 526, controlling the compressor to operate according to the acquired rotating speed of the compressor, and continuously detecting the operating power of the compressor.
In step S528, if the difference between the operating power of the compressor and the power threshold is always smaller than zero in the set time period, the compressor speed of the compressor is increased.
By using the above method, the refrigerator 10 and the control method thereof of the present embodiment can adjust the operation state of the refrigerator 10 according to the difference between the operation power and the power threshold by monitoring the operation power of the compressor of the refrigerator 10 and analyzing the operation power and the preset power threshold, which can reduce or avoid the occurrence of the over-power problem of the compressor of the refrigerator 10 and improve the operation reliability of the refrigerator 10.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A control method of a refrigerator, comprising:
step A: acquiring the running power of a compressor of the refrigerator;
and B: acquiring a preset power threshold value, and calculating a difference value between the operating power and the power threshold value;
and C: and adjusting the running state of the refrigerator according to the difference value.
2. The control method according to claim 1,
the step C comprises the following steps:
judging whether the difference value is smaller than a preset difference value threshold value and larger than zero;
if so, controlling the compressor to reduce the frequency, detecting the press rotating speed of the compressor, and further adjusting the running state of the refrigerator according to the press rotating speed of the compressor.
3. The control method according to claim 2, wherein,
the step of further adjusting the operation state of the refrigerator according to the press rotation speed of the compressor comprises:
judging whether the rotating speed of a compressor of the compressor is lower than a preset rotating speed threshold value or not;
if so, acquiring the running power of the compressor again, and judging whether the difference value between the running power of the compressor and the power threshold value is smaller than a preset difference value threshold value and larger than zero;
and if so, controlling the compressor to stop.
4. The control method according to claim 2, wherein,
when controlling the compressor to reduce the frequency, the step C further comprises the following steps:
increasing the fan rotating speed of an air supply fan of the refrigerator; and/or
And increasing the temperature of the starting point and the shutdown point of the compartment in the refrigerator.
5. The control method according to claim 1,
the step C comprises the following steps:
judging whether the difference value is greater than or equal to a preset difference value threshold value or not;
and if so, controlling the compressor to stop.
6. The control method according to any one of claims 3 or 5,
after controlling the compressor to stop, step C further comprises:
and controlling the compressor to start the standby frequency conversion plate and controlling the compressor to start and operate.
7. The control method according to any one of claims 3 or 5,
after controlling the compressor to stop, step C further comprises:
obtaining the freshness grade of the inner chamber of the refrigerator;
and adjusting the cold quantity supplied to the refrigerator inner chamber according to the preservation grade.
8. The control method according to claim 1,
the step C comprises the following steps:
if the difference value is not greater than zero, obtaining the running record of the refrigerator press;
and adjusting the running state of the refrigerator according to the running record of the press.
9. The control method according to claim 8,
the step of adjusting the operation state of the refrigerator according to the press operation record comprises the following steps:
judging whether the compressor is subjected to over-frequency reduction according to the press operation record;
if so, further acquiring the press rotating speed of the compressor;
and controlling the compressor to operate according to the acquired rotating speed of the compressor, continuously detecting the operating power of the compressor, and if the difference value between the operating power of the compressor and the power threshold value is always smaller than zero in a set time period, increasing the rotating speed of the compressor.
10. A refrigerator, comprising:
a processor and a memory, the memory having stored therein a control program for implementing the control method according to any one of claims 1-9 when executed by the processor.
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| CN202010942110.5A CN114234545A (en) | 2020-09-09 | 2020-09-09 | Refrigerator and control method thereof |
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