CN116447795A - Refrigerating and freezing device and control method thereof - Google Patents
Refrigerating and freezing device and control method thereof Download PDFInfo
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- CN116447795A CN116447795A CN202210024671.6A CN202210024671A CN116447795A CN 116447795 A CN116447795 A CN 116447795A CN 202210024671 A CN202210024671 A CN 202210024671A CN 116447795 A CN116447795 A CN 116447795A
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- 238000007710 freezing Methods 0.000 title claims abstract description 230
- 230000008014 freezing Effects 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005057 refrigeration Methods 0.000 claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims abstract description 10
- 230000002829 reductive effect Effects 0.000 claims description 16
- 230000015654 memory Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009920 food preservation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
-
- 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
-
- 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
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0413—Treating air flowing to refrigeration compartments by purification by humidification
- F25D2317/04131—Control means therefor
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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
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
- F25D2317/0684—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans the fans allowing rotation in reverse direction
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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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The present invention relates to a refrigerating and freezing apparatus and a control method thereof, and the refrigerating and freezing apparatus includes a case defining a freezing compartment, a freezing evaporator for providing cold energy to the freezing compartment, a freezing fan for driving air supply into the freezing compartment, and a compressor for compressing a refrigerant. The control method of the invention comprises the following steps: when the refrigeration and freezing device is in a refrigerating state of the freezing compartment, acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment; calculating the absolute value of the temperature difference between the evaporator temperature and the intermediate temperature; and selectively adjusting the rotating speed of the refrigerating fan or the operating frequency of the compressor according to the absolute value of the temperature difference so that the absolute value of the temperature difference between the evaporator temperature and the inter-chamber temperature is smaller than or equal to a preset temperature difference threshold value. The invention properly controls the humidity of the freezing chamber during the refrigerating period of the freezing chamber, and avoids the problem of larger fluctuation of the humidity in the freezing chamber caused by the scheme of refrigerating before humidifying in the prior art.
Description
Technical Field
The present invention relates to a refrigeration technology, and more particularly, to a refrigeration and freezing apparatus and a control method thereof.
Background
The humidity in the refrigerating and freezing device can influence the evaporation speed of the water in the food materials, thereby influencing the quality of the food materials. When the humidity is too low, the water of the food material evaporates faster, which causes weight loss of the food material, and then causes the problems of poor food storage effect, shorter food preservation period and the like. Therefore, it is always a critical research topic to keep the refrigerating and freezing apparatus wet. However, most of the conventional refrigerating and freezing apparatuses humidify and moisturize the refrigerating chamber, and there is little concern about humidification and moisturization of the freezing chamber. In fact, the air-cooled refrigeration and freezing device generally has the problem that the humidity fluctuation is large during the freezing and refrigerating period, the humidity fluctuation and the humidity are low, and food stored in the freezing chamber can lose water, so that the taste of the food is affected, nutrition loss is caused, and the user experience is affected.
The conventional method is to use the humidifying device to perform humidifying operation after the humidity of the compartment has been reduced, however, for the freezing compartment, the temperature in the humidifying device is very low, the humidifying device is easy to generate frost and is blocked, the humidifying effect is not obvious, and the humidifying device is very difficult to apply to practical products. Even if a certain humidifying effect exists, a certain time is required for the humidity in the freezing chamber to rise, and the preservation quality of the food materials is still affected to a certain extent.
Disclosure of Invention
An object of a first aspect of the present invention is to overcome at least one of the drawbacks of the prior art by providing a control method for a refrigeration and freezer that avoids large fluctuations in humidity within the freezer compartment.
Another object of the first aspect of the invention is to improve the feasibility of the practical application of the refrigeration and freezer.
The object of the second aspect of the present invention is to provide a refrigerating and freezing apparatus capable of avoiding a large fluctuation in humidity in a freezing compartment.
According to a first aspect of the present invention, there is provided a control method of a refrigerating and freezing apparatus including a cabinet defining a freezing compartment, a freezing evaporator for providing cold to the freezing compartment, a freezing blower for driving air supply into the freezing compartment, and a compressor for compressing a refrigerant; the control method comprises the following steps:
when the refrigeration and freezing device is in a refrigerating state of a refrigerating compartment, acquiring the evaporator temperature of the refrigerating evaporator and the compartment temperature in the refrigerating compartment;
calculating an absolute value of a temperature difference between the evaporator temperature and the inter-chamber temperature; and
and selectively adjusting the rotating speed of the refrigerating fan or the operating frequency of the compressor according to the absolute value of the temperature difference, so that the absolute value of the temperature difference between the evaporator temperature and the inter-chamber temperature is smaller than or equal to a preset temperature difference threshold value.
Optionally, the step of selectively adjusting the rotation speed of the freezing blower or the operation frequency of the compressor according to the absolute value of the temperature difference includes:
when the absolute value of the temperature difference is larger than the preset temperature difference threshold value and the rotating speed of the refrigerating fan does not reach the preset maximum rotating speed, the rotating speed of the refrigerating fan is increased; and
and when the absolute value of the temperature difference is larger than the preset temperature difference threshold value and the rotating speed of the refrigerating fan reaches the preset maximum rotating speed, reducing the operating frequency of the compressor.
Optionally, the step of selectively adjusting the rotation speed of the freezing blower or the operation frequency of the compressor according to the absolute value of the temperature difference further includes:
and when the absolute value of the temperature difference is smaller than or equal to the preset temperature difference threshold value, keeping the rotating speed of the refrigerating fan and the operating frequency of the compressor unchanged.
Optionally, after the rotation speed of the freezing fan is increased or the operation frequency of the compressor is reduced, returning to continuously obtain the evaporator temperature of the freezing evaporator and the room temperature in the freezing room, recalculating the absolute value of the temperature difference between the evaporator temperature and the room temperature, and selectively adjusting the rotation speed of the freezing fan or the operation frequency of the compressor according to the relationship between the recalculated absolute value of the temperature difference and the preset temperature difference threshold.
Optionally, the rotation speed of the refrigerating fan is increased by the same amplitude every time.
Optionally, the refrigerating fan is controlled in a PWM manner, and the duty ratio of the refrigerating fan is increased by 5% -10% of the set duty ratio during refrigerating of the refrigerating compartment each time.
Optionally, the refrigerating fan is controlled in a voltage mode, and the voltage of the refrigerating fan is increased by 0.5-1V each time.
Optionally, the compressor reduces the frequency each time by the same magnitude.
Optionally, the operating frequency of the compressor is reduced at a time with an amplitude of 2 to 20 hz.
According to a second aspect of the present invention, there is also provided a refrigeration and freezing apparatus including a cabinet defining a freezing compartment, a freezing evaporator for providing cold to the freezing compartment, a freezing blower for driving air into the freezing compartment, and a compressor for compressing a refrigerant, the refrigeration and freezing apparatus further comprising:
the control device comprises a processor and a memory, wherein a machine executable program is stored in the memory, and the machine executable program is used for realizing the control method according to any scheme when being executed by the processor.
When the refrigerating and freezing device is in a refrigerating state of the freezing compartment, the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator and the compartment temperature of the freezing compartment is dynamically kept within the range of less than or equal to the preset temperature difference threshold value by selectively adjusting the rotating speed of the refrigerating fan or the running frequency of the compressor, so that the phenomenon that the temperature difference between the evaporator temperature and the compartment temperature of the freezing compartment is overlarge, namely that the evaporator temperature of the freezing evaporator is too lower than the compartment temperature of the freezing compartment is avoided, and more moisture in the freezing compartment is prevented from condensing on the freezing evaporator, thereby avoiding the phenomenon that the humidity in the freezing compartment is suddenly reduced. The invention properly controls the humidity of the freezing chamber during the refrigerating period of the freezing chamber, and avoids the problem of larger fluctuation of the humidity in the freezing chamber caused by the scheme of refrigerating before humidifying in the prior art.
In addition, the invention realizes the purpose of inhibiting indoor humidity fluctuation between freezers by controlling the rotating speed of the refrigerating fan or the operating frequency of the compressor on the basis of the original structure of the refrigerating and freezing device without adding any auxiliary structure, thereby having no influence on the original structure and storage capacity of the refrigerating and freezing device and improving the feasibility of practical application.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic block diagram of a refrigeration and freezer according to one embodiment of the invention;
FIG. 2 is a schematic block diagram of a refrigeration system of a refrigeration chiller according to one embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method of controlling a refrigeration and freezer according to one specific embodiment of the invention;
FIG. 4 is a schematic flow chart of selectively adjusting the rotational speed of a refrigeration fan or the operating frequency of a compressor based on the absolute value of the temperature difference, in accordance with one particular embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method of controlling a refrigeration and freezer according to another embodiment of the invention;
fig. 6 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention first provides a control method of a refrigerating and freezing apparatus, fig. 1 is a schematic structural diagram of the refrigerating and freezing apparatus according to an embodiment of the present invention, and fig. 2 is a schematic structural block diagram of a refrigerating system of the refrigerating and freezing apparatus according to an embodiment of the present invention.
Referring to fig. 1 and 2, the refrigerating and freezing apparatus 1 includes a cabinet 10 defining a freezing compartment 11, a freezing evaporator 21 for supplying cold to the freezing compartment 11, a freezing fan 31 for driving air supply into the freezing compartment 11, and a compressor 22 for compressing a refrigerant. Wherein the freezing evaporator 21 and the compressor 22 belong to two components of the refrigeration system 20, the refrigeration system 20 may further comprise a condenser 23, a freezing capillary 24, and the like.
The inventors have realized that during refrigeration of the refrigerated compartment 11, the evaporator temperature of the refrigerated evaporator 21 must be lower than the compartment temperature of the refrigerated compartment 11 to have the ability to cool down the refrigerated compartment 11. Whereas water vapor typically collects and condenses at lower temperatures. Therefore, during the cooling of the freezing compartment 11, the moisture in the freezing compartment 11 is condensed at the freezing evaporator 21, and the humidity in the freezing compartment 11 is inevitably lowered. Due to the physical properties of water vapor, the level of humidity decrease in the freezer compartment 11 depends on the temperature difference relationship between the freezer evaporator 21 and the freezer compartment 11, i.e. the greater the absolute value of the temperature difference between the freezer evaporator 21 and the freezer compartment 11, the more humidity decrease in the freezer compartment 11, the lower the humidity. Therefore, the humidity in the freezing compartment 11 can be controlled by adjusting the absolute value of the temperature difference between the freezing evaporator 21 and the freezing compartment 11.
The inventors have further realized that after the structural determination of the freeze evaporator 21 and the air circuit cycle, the absolute value of the temperature difference between the freeze evaporator 21 and the freezer compartment 11 is related to the temperature of the freeze evaporator 21 itself and the heat exchange level of the freeze evaporator 21. For the structure of the refrigeration system, which adopts the capillary for throttling, the structure of the freezing capillary 24 is determined, and the temperature of the freezing evaporator 21 is not adjustable, and depends on the operation frequency of the compressor 22. For a refrigeration and freezer, the heat exchange level of the refrigeration evaporator 21 is only dependent on the rotational speed of the refrigeration fan 31, since the configuration of the refrigeration evaporator 21 and the air circuit circulation configuration have been determined to be unchanged.
Based on the above knowledge, the present invention provides a control method of a refrigerating and freezing apparatus, comprising:
when the refrigerating and freezing device 1 is in a state in which the freezing compartment is refrigerating, the evaporator temperature of the freezing evaporator 21 and the compartment temperature in the freezing compartment 11 are obtained;
calculating an absolute value of a temperature difference between the evaporator temperature of the freezing evaporator 21 and the compartment temperature inside the freezing compartment 11; and
the rotation speed of the freezing blower 31 or the operation frequency of the compressor 22 is selectively adjusted according to the absolute value of the temperature difference so that the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the inter-chamber temperature within the freezing compartment 11 is equal to or less than a preset temperature difference threshold.
In the control method of the present invention, when the refrigerating and freezing device 1 is in a refrigerating state of the refrigerating compartment, the absolute value of the temperature difference between the evaporator temperature of the refrigerating evaporator 21 and the compartment temperature of the refrigerating compartment 11 is dynamically kept within the range of less than or equal to the preset temperature difference threshold value by selectively adjusting the rotation speed of the refrigerating fan 31 or the operation frequency of the compressor 22, so that the absolute value of the temperature difference between the evaporator temperature of the refrigerating evaporator 21 and the compartment temperature of the refrigerating compartment 11 is prevented from being excessively large, that is, the evaporator temperature of the refrigerating evaporator 21 is prevented from being excessively lower than the compartment temperature of the refrigerating compartment 11, and more moisture in the refrigerating compartment 11 is prevented from being condensed on the refrigerating evaporator 21, thereby preventing the phenomenon that the humidity in the refrigerating compartment 11 is rapidly reduced.
The invention properly controls the humidity of the freezing chamber 11 during the refrigerating period of the freezing chamber, and avoids the problem of larger fluctuation of the humidity in the freezing chamber 11 caused by the scheme of refrigerating before humidifying in the prior art.
In addition, the invention realizes the purpose of inhibiting the humidity fluctuation in the freezing chamber 11 by controlling the rotating speed of the refrigerating fan 31 or the operating frequency of the compressor 22 on the basis of the original structure of the refrigerating and freezing device 1 without adding any auxiliary structure, thereby having no influence on the original structure and storage capacity of the refrigerating and freezing device 1 and improving the feasibility of practical application.
Fig. 3 is a schematic flowchart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention, referring to fig. 3, the control method of the present invention includes:
step S10, acquiring the current state of the refrigeration and freezing device 1;
step S20, judging whether the refrigeration and freezing device 1 is in a refrigerating state of a freezing compartment; if yes, go to step S30, if no, return to step S10; and
step S30, acquiring the evaporator temperature of the freezing evaporator 21 and the compartment temperature in the freezing compartment 11;
step S40, calculating the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the compartment temperature in the freezing compartment 11;
step S50, selectively adjusting the rotation speed of the freezing blower 31 or the operation frequency of the compressor 22 according to the absolute value of the temperature difference so that the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the compartment temperature in the freezing compartment 11 is equal to or less than a preset temperature difference threshold.
In some embodiments, the step of selectively adjusting the rotational speed of the freezing blower 31 or the operating frequency of the compressor 22 according to the absolute value of the temperature difference may specifically include:
when the absolute value of the temperature difference is larger than a preset temperature difference threshold value and the rotating speed of the refrigerating fan 31 does not reach a preset maximum rotating speed, the rotating speed of the refrigerating fan 31 is increased; and
when the absolute value of the temperature difference is greater than the preset temperature difference threshold value and the rotation speed of the freezing blower 31 has reached the preset maximum rotation speed, the operation frequency of the compressor 22 is reduced.
According to the above analysis, the absolute value of the temperature difference between the freezing evaporator 21 and the freezing compartment 11 is related to the heat exchange level of the freezing evaporator 21. Since the structure of the freezing evaporator 21 and the air path circulation structure have been determined, the heat exchange level of the freezing evaporator 21 is only related to the rotation speed of the freezing blower 31. The higher the rotation speed of the freezing blower 31, the better the heat exchange level of the freezing evaporator 21, and the smaller the absolute value of the temperature difference between the freezing evaporator 21 and the freezing compartment 11. Therefore, the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the compartment temperature inside the freezing compartment 11 can be effectively reduced by increasing the rotation speed of the freezing blower 31.
However, the rotation speed of the freezing blower 31 may not be too high in consideration of noise factors, and therefore, even when the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the inter-chamber temperature within the freezing compartment 11 is greater than the preset temperature difference threshold value, it is not easy to always increase the rotation speed of the freezing blower 31. For this reason, when the rotation speed of the freezing blower 31 has reached the preset maximum rotation speed, it is necessary to reduce the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the compartment temperature inside the freezing compartment 11 by other means.
According to the above analysis, the absolute value of the temperature difference between the freezing evaporator 21 and the freezing compartment 11 is also related to the own temperature of the freezing evaporator 21. The structure of the freezing capillary 24 is already determined, not regulated, and the temperature of the freezing evaporator 21 itself depends on the operating frequency of the compressor 22. The higher the operating frequency of the compressor 22, the lower the evaporator temperature of the freeze evaporator 21; the lower the operating frequency of the compressor 22, the higher the evaporator temperature of the freeze evaporator 21. Therefore, when the rotation speed of the freezing blower 31 is not adjustable, the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the compartment temperature inside the freezing compartment 11 can be effectively reduced by reducing the operation frequency of the compressor 22.
During the refrigeration of the freezer compartment 11, a reduction in the operating frequency of the compressor 22 will have a more or less effect on the refrigeration efficiency in the freezer compartment 11, whereas an increase in the rotational speed of the freezer fan 31 will increase the air supply in the freezer compartment 11 without negatively affecting the refrigeration of the freezer compartment 11. Therefore, in the present invention, when the absolute value of the temperature difference between the freezing evaporator 21 and the freezing compartment 11 is greater than the preset temperature difference threshold, the rotation speed of the freezing blower 31 is first raised, and if the rotation speed of the freezing blower 31 is not adjustable, the operation frequency of the compressor 22 is reduced, so that adverse effects of the operation of suppressing the humidity fluctuation on the refrigerating efficiency in the freezing compartment 11 are avoided or reduced as much as possible.
In some embodiments, the step of selectively adjusting the rotational speed of the freezing blower 31 or the operating frequency of the compressor 22 according to the absolute value of the temperature difference may specifically further include:
when the absolute value of the temperature difference is less than or equal to the preset temperature difference threshold value, the rotation speed of the freezing blower 31 and the operation frequency of the compressor 22 are kept unchanged.
That is, when the absolute value of the temperature difference between the evaporator temperature of the freezing evaporator 21 and the room temperature in the freezing room 11 is less than or equal to the preset temperature difference threshold, it is indicated that the temperature of the freezing evaporator 21 is not much lower than the temperature in the freezing room 11, and at this time, the dehumidifying effect of the freezing evaporator 21 on the air flow is not remarkable, the humidity in the freezing room 11 is slowly lowered, and a drastic humidity fluctuation phenomenon does not occur, so that no remarkable adverse effect is exerted on the quality of food preservation. At this time, there is no need to adjust the refrigerating fan 31 and the rotation speed and the operation frequency of the compressor 22.
Fig. 4 is a schematic flowchart of selectively adjusting the rotation speed of the freezing blower or the operation frequency of the compressor according to the absolute value of the temperature difference according to an embodiment of the present invention, referring to fig. 4, the step S50 of selectively adjusting the rotation speed of the freezing blower or the operation frequency of the compressor according to the absolute value of the temperature difference may specifically include:
step S51, judging whether the absolute value of the temperature difference is smaller than or equal to a preset temperature difference threshold value; if yes, go to step S52, if no, return to step S53;
step S52, keeping the rotation speed of the refrigerating fan 31 and the operation frequency of the compressor 22 unchanged;
step S53, judging whether the rotation speed of the freezing fan 31 reaches a preset maximum rotation speed; if yes, go to step S54, if no, return to step S55;
step S54, reducing the operation frequency of the compressor 22;
in step S55, the rotation speed of the freezing blower 31 is increased.
In some embodiments, after increasing the rotational speed of the freezing blower 31 or decreasing the operating frequency of the compressor 22, the evaporator temperature of the freezing evaporator 21 and the compartment temperature within the freezing compartment 11 are continuously obtained, the absolute value of the temperature difference between the evaporator temperature and the compartment temperature is recalculated, and the rotational speed of the freezing blower 31 or the operating frequency of the compressor 22 is selectively adjusted according to the relationship between the recalculated absolute value of the temperature difference and the preset temperature difference threshold.
That is, the rotation speed of the cooling fan 31 and the operation frequency of the compressor 22 are adjusted slowly and repeatedly, and the absolute value of the temperature difference between the evaporator temperature and the room temperature is continuously judged whether to meet the requirement after each adjustment, and if not, the adjustment is continuously carried out, so that the excessive increase of the rotation speed of the cooling fan 31 at one time is avoided to generate larger noise, and the excessive decrease of the operation frequency of the compressor 22 at one time is avoided to greatly influence the refrigerating efficiency of the cooling room 11.
Fig. 5 is a schematic flowchart of a control method of a refrigerating and freezing apparatus according to another embodiment of the present invention, referring to fig. 5, after step S54 or step S55, returning to step S30 to continue to perform step S30 and the related steps thereafter.
In some embodiments, the magnitude of each increase in rotational speed of the freezing blower 31 is the same. That is, the rotation speed of the freezing blower 31 is increased uniformly, and the control is easy.
Specifically, the freezing blower 31 may be controlled in a PWM manner, in which case the duty ratio of the freezing blower 31 is increased by 5% to 10% of the set duty ratio during freezing compartment cooling at a time. For example, the duty cycle of the freezing blower 31 is increased by 5%, 6%, 7%, 8%, 9% or 10% of the set duty cycle each time. During refrigeration of the freezer compartment, the freezer fan 31 has a preset set duty cycle, and the freezer fan 31 is operated at its set duty cycle when there is no need to adjust the humidity of the freezer compartment 11. When the rotation speed of the freezing blower 31 needs to be increased, the duty ratio of the freezing blower 31 is increased according to the amplitude of 5% -10% of the set duty ratio, so that the operation of the freezing blower 31 is more stable.
In other embodiments, the freezing blower 31 may be controlled in a voltage manner, and the voltage of the freezing blower 31 is increased by 0.5-1V each time. That is, the voltage of the freezing blower 31 is increased by 0.5-1V on the basis of the voltage after the previous adjustment every time the voltage of the freezing blower 31 is adjusted, so that the operation of the freezing blower 31 is more stable. For example, the voltage of the freezing blower 31 is increased by 0.5V, 0.6V, 0.7V, 0.8V, 0.9V, 1V, or the like each time.
In some embodiments, the amplitude of the reduced frequency of the compressor 22 is the same each time. That is, the operation frequency of the compressor 22 is reduced uniformly, and the control is easy.
Specifically, the operating frequency of the compressor 22 can be reduced by a range of 2 to 20 hz at a time to find as much as possible the operating frequency of the compressor 22 that can suppress the fluctuation of the humidity in the freezing compartment 11 and has the smallest influence on the refrigerating effect in the freezing compartment 11. For example, the operating frequency of the compressor 22 is reduced by 2 hz, 4 hz, 6 hz, 8 hz, 10 hz, 12 hz, 14 hz, 16 hz, 18 hz, 20 hz, etc. each time.
The present invention also provides a refrigerating and freezing apparatus, and fig. 6 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention. Referring to fig. 1, 2 and 6, the refrigerating and freezing apparatus 1 of the present invention includes a cabinet 10 defining a freezing compartment 11, a freezing evaporator 21 for providing cold to the freezing compartment 11, a freezing blower 31 for driving air supply into the freezing compartment 11, and a compressor 22 for compressing a refrigerant. Wherein the freezing evaporator 21 and the compressor 22 belong to two components of the refrigeration system 20, the refrigeration system 20 may further comprise a condenser 23, a freezing capillary 24, and the like.
In particular, the refrigerating and freezing apparatus 1 further comprises a control device 40, the control device 40 comprises a processor 41 and a memory 42, the memory 42 stores a machine executable program 43, and the machine executable program 43 is used to implement the control method described in any of the above embodiments when executed by the processor 41.
Specifically, the compressor 22 and the freezing blower 31 are both connected to the control device 40 to operate under the control of the control device 40.
Specifically, the processor 41 may be a central processing unit (central processing unit, simply referred to as CPU), or a digital processing unit, or the like. The processor 41 transmits and receives data through a communication interface. The memory 44 is used to store programs executed by the processor 41. Memory 44 is 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, and may be a combination of memories. The above-described machine-executable program 43 may be downloaded from a computer-readable storage medium to a corresponding computing/processing device or downloaded to a computer or an external memory device via a network (e.g., the internet, a local area network, a wide area network, and/or a wireless network).
The refrigeration and freezing device 1 of the invention properly controls the humidity of the freezing chamber 11 during the freezing chamber refrigeration period, thereby avoiding the problem of large fluctuation of the humidity in the freezing chamber 11 caused by the scheme of refrigeration before humidification in the prior art.
In addition, the invention realizes the purpose of inhibiting the humidity fluctuation in the freezing chamber 11 by controlling the rotating speed of the refrigerating fan 31 or the operating frequency of the compressor 22 on the basis of the original structure of the refrigerating and freezing device 1 without adding any auxiliary structure, thereby having no influence on the original structure and storage capacity of the refrigerating and freezing device 1 and improving the feasibility of practical application.
In some embodiments, a refrigerated compartment 12 and/or a variable temperature compartment 13 may also be defined within the cabinet 10. It will be appreciated that the freezing compartment 11 is a storage compartment for freezing, the refrigerating compartment 12 is a storage compartment for refrigerating, and the temperature-changing compartment 13 is a storage compartment with a wide temperature adjustable range. Typically, the temperature in the refrigerated compartment 12 and the variable temperature compartment 13 is higher than the temperature in the freezer compartment 11.
Taking the case 10 having the freezing compartment 11, the refrigerating compartment 12 and the temperature changing compartment 13 defined therein, the refrigeration system 20 may further include a refrigerating evaporator 25, a refrigerating capillary 26, a temperature changing evaporator 27, a temperature changing capillary 28, a solenoid valve 29, and the like.
Specifically, the refrigeration evaporator 25 and the refrigeration capillary 26 are connected in series to form a refrigeration branch; the temperature-varying evaporator 27 and the temperature-varying capillary tube 28 are connected in series to form a temperature-varying branch. The refrigeration branch, the temperature-changing branch and the freezing capillary tube are arranged in parallel and are all connected in series with the electromagnetic valve 29. The series connection and the parallel connection referred to in the present invention refer to the physical series connection and the parallel connection of the refrigerant flow paths, respectively, and are not the series connection and the parallel connection of the circuit structures.
When the refrigerating and freezing apparatus 1 is in a state in which the non-freezing compartment is refrigerating (for example, a state in which the refrigerating compartment is refrigerating), the solenoid valve 29 is provided in communication with the condenser 23 and the non-freezing branch (for example, the refrigerating branch) corresponding to the non-freezing compartment, and at this time, the refrigerant flowing out from the compressor 22 passes through the condenser 23, the solenoid valve 29, the non-freezing evaporator (for example, the refrigerating evaporator 25) and the non-freezing capillary (for example, the refrigerating capillary 26) of the non-freezing branch (for example, the refrigerating branch), the freezing evaporator 21 in this order, and finally returns to the compressor 22. When the refrigerating and freezing apparatus 1 is in a refrigerating compartment refrigerating state, the electromagnetic valve 29 is provided in a state of communicating the condenser 23 with the refrigerating capillary tube 24, and at this time, the refrigerant flowing out of the compressor 21 passes through the condenser 23, the electromagnetic valve 29, the refrigerating capillary tube 24 and the refrigerating evaporator 21 in this order, and finally returns to the compressor 22.
It will be appreciated by those skilled in the art that the refrigeration and freezer 1 of the present invention is not limited to the three door refrigerator shown in fig. 1 and may be a single door refrigerator, a double door refrigerator, or other refrigerators having a freezer compartment.
It will be appreciated by those skilled in the art that the refrigeration and freezer 1 of the present invention includes not only a refrigerator but also a freezer, a refrigerator or other refrigeration and freezer having at least a freezing function.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (10)
1. A control method of a refrigerating and freezing apparatus including a cabinet defining a freezing compartment, a freezing evaporator for providing cold to the freezing compartment, a freezing blower for driving air supply into the freezing compartment, and a compressor for compressing a refrigerant; the control method comprises the following steps:
when the refrigeration and freezing device is in a refrigerating state of a refrigerating compartment, acquiring the evaporator temperature of the refrigerating evaporator and the compartment temperature in the refrigerating compartment;
calculating an absolute value of a temperature difference between the evaporator temperature and the inter-chamber temperature; and
and selectively adjusting the rotating speed of the refrigerating fan or the operating frequency of the compressor according to the absolute value of the temperature difference, so that the absolute value of the temperature difference between the evaporator temperature and the inter-chamber temperature is smaller than or equal to a preset temperature difference threshold value.
2. The control method of claim 1, wherein selectively adjusting the rotational speed of the freezing blower or the operating frequency of the compressor according to the absolute value of the temperature difference comprises:
when the absolute value of the temperature difference is larger than the preset temperature difference threshold value and the rotating speed of the refrigerating fan does not reach the preset maximum rotating speed, the rotating speed of the refrigerating fan is increased; and
and when the absolute value of the temperature difference is larger than the preset temperature difference threshold value and the rotating speed of the refrigerating fan reaches the preset maximum rotating speed, reducing the operating frequency of the compressor.
3. The control method of claim 2, wherein selectively adjusting the rotational speed of the freezing blower or the operating frequency of the compressor according to the absolute value of the temperature difference further comprises:
and when the absolute value of the temperature difference is smaller than or equal to the preset temperature difference threshold value, keeping the rotating speed of the refrigerating fan and the operating frequency of the compressor unchanged.
4. The control method according to claim 2, wherein,
and after the rotating speed of the refrigerating fan is increased or the operating frequency of the compressor is reduced, returning to continuously acquire the evaporator temperature of the refrigerating evaporator and the room temperature in the refrigerating room, recalculating the absolute value of the temperature difference between the evaporator temperature and the room temperature, and selectively adjusting the rotating speed of the refrigerating fan or the operating frequency of the compressor according to the relationship between the recalculated absolute value of the temperature difference and the preset temperature difference threshold.
5. The control method according to claim 4, wherein,
the amplitude of the rotation speed of the refrigerating fan is the same every time.
6. The control method according to claim 5, wherein,
the refrigerating fan is controlled in a PWM mode, and the duty ratio of the refrigerating fan is increased by 5-10% of the set duty ratio in the refrigerating period of the refrigerating compartment every time.
7. The control method according to claim 5, wherein,
the refrigerating fan is controlled in a voltage mode, and the voltage of the refrigerating fan is increased by 0.5-1V each time.
8. The control method according to claim 4, wherein,
the compressor reduces the frequency each time by the same magnitude.
9. The control method according to claim 8, wherein,
the operating frequency of the compressor is reduced at a time with an amplitude of 2 to 20 hz.
10. A refrigeration and freezing apparatus including a cabinet defining a freezing compartment, a freezing evaporator for providing cold to the freezing compartment, a freezing blower for driving air into the freezing compartment, and a compressor for compressing a refrigerant, the refrigeration and freezing apparatus further comprising:
control device comprising a processor and a memory, said memory having stored therein a machine executable program, and said machine executable program when executed by said processor being adapted to carry out the control method according to any one of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024671.6A CN116447795A (en) | 2022-01-07 | 2022-01-07 | Refrigerating and freezing device and control method thereof |
| PCT/CN2022/142355 WO2023131001A1 (en) | 2022-01-07 | 2022-12-27 | Refrigeration and freezing apparatus and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024671.6A CN116447795A (en) | 2022-01-07 | 2022-01-07 | Refrigerating and freezing device and control method thereof |
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| Publication Number | Publication Date |
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| CN116447795A true CN116447795A (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210024671.6A Pending CN116447795A (en) | 2022-01-07 | 2022-01-07 | Refrigerating and freezing device and control method thereof |
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| Country | Link |
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| CN (1) | CN116447795A (en) |
| WO (1) | WO2023131001A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2835601B1 (en) * | 2013-08-06 | 2017-10-04 | LG Electronics Inc. | Refrigerator and control method thereof |
| JP6334146B2 (en) * | 2013-11-27 | 2018-05-30 | 東芝ライフスタイル株式会社 | refrigerator |
| CN104677048B (en) * | 2015-03-19 | 2017-03-15 | 合肥美菱股份有限公司 | A kind of refrigeration for refrigerator compartment air quantity control method and its electric refrigerator |
| CN110094917A (en) * | 2018-01-31 | 2019-08-06 | 日立空调·家用电器株式会社 | Refrigerator |
| CN110749150B (en) * | 2019-10-16 | 2021-12-28 | 长虹美菱股份有限公司 | Rotating speed control system and method of refrigerating fan |
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- 2022-01-07 CN CN202210024671.6A patent/CN116447795A/en active Pending
- 2022-12-27 WO PCT/CN2022/142355 patent/WO2023131001A1/en unknown
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