CN116481232A - Refrigerating and freezing device and control method thereof - Google Patents
Refrigerating and freezing device and control method thereof Download PDFInfo
- Publication number
- CN116481232A CN116481232A CN202210038853.9A CN202210038853A CN116481232A CN 116481232 A CN116481232 A CN 116481232A CN 202210038853 A CN202210038853 A CN 202210038853A CN 116481232 A CN116481232 A CN 116481232A
- Authority
- CN
- China
- Prior art keywords
- freezing
- compartment
- refrigerating
- humidity
- refrigeration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007710 freezing Methods 0.000 title claims abstract description 258
- 230000008014 freezing Effects 0.000 title claims abstract description 258
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005057 refrigeration Methods 0.000 claims abstract description 87
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 230000015654 memory Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009920 food preservation Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 3
- 230000009246 food effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing 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
- 238000012544 monitoring process Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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, wherein the refrigerating and freezing apparatus includes a case defining a freezing compartment, a freezing fan for driving air supply into the freezing compartment, and a compression refrigeration system having a compressor. The control method of the invention comprises the following steps: when the refrigerating and freezing device reaches a preset automatic shutdown condition, acquiring the humidity in the freezing compartment; if the humidity in the freezing compartment is higher than or equal to the preset highest humidity, the compressor and the freezing fan are controlled to stop running; if the humidity in the freezing chamber is lower than the preset maximum humidity, the humidity in the freezing chamber is increased to the preset maximum humidity, and then the compressor and the refrigerating fan are controlled to stop running. Before the refrigerating and freezing device is stopped, the indoor humidity of the freezing chamber is increased to the preset highest humidity, and then the refrigerating and freezing device is stopped. Therefore, the humidity in the freezing chamber can be maintained at a higher level of the preset highest humidity during the shutdown period, and the influence on the food preservation effect due to lower humidity in the freezing chamber is avoided.
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.
Some prior art approaches to humidification of the freezer compartment have included very complex humidification devices within the refrigeration freezer. However, the temperature of the freezing chamber is low, the humidifying device is easy to generate frost and is blocked, and the humidifying device occupies the space of the air channel or the space of the room. Therefore, the existing schemes not only increase the cost and assembly difficulty of the refrigerating and freezing device, but also are very difficult to be practically applied, so that the problem of low humidity of the freezing chamber cannot be practically solved.
Disclosure of Invention
It is an object of a first aspect of the present invention to overcome at least one of the drawbacks of the prior art by providing a control method for a refrigerated freezer capable of maintaining the humidity in the freezer compartment at a high level during a shutdown.
A further object of the first aspect of the invention is to avoid having a large influence on the temperature of the freezer compartment.
It is an object of a second aspect of the present invention to provide a refrigerated freezer capable of maintaining the humidity in the freezer compartment at a high level during shutdown.
According to a first aspect of the present invention, there is provided a control method of a refrigeration and freezer comprising a cabinet defining a freezer compartment, a freezer fan for driving an air supply into the freezer compartment, and a compression refrigeration system having a compressor; the control method comprises the following steps:
when the refrigerating and freezing device reaches a preset automatic shutdown condition, acquiring the humidity in the freezing compartment;
if the humidity in the freezing compartment is higher than or equal to the preset highest humidity, controlling the compressor and the freezing fan to stop running;
if the humidity in the freezing compartment is lower than the preset highest humidity, the humidity in the freezing compartment is increased to the preset highest humidity, and then the compressor and the refrigerating fan are controlled to stop running.
Optionally, the compression refrigeration system comprises a refrigeration branch connected in series with the compressor, the refrigeration branch comprising a refrigeration evaporator and a refrigeration throttling device;
before the automatic shutdown condition is reached, the refrigerating and freezing device is in a refrigerating chamber refrigerating state, and the refrigerating fan is in an operating state in the refrigerating chamber refrigerating state; and is also provided with
The step of increasing the humidity in the freezing compartment to the preset maximum humidity includes:
the refrigeration blower is maintained in an operating state and the compressor is controlled to operate at a frequency lower than a first set frequency thereof in a refrigeration state of the refrigeration compartment so that an evaporator temperature of the refrigeration evaporator is higher than a compartment temperature in the refrigeration compartment.
Optionally, at least one non-freezing compartment is further defined in the box, the compression refrigeration system further comprises a freezing branch connected in series with the compressor, the freezing branch comprises a freezing evaporator and a freezing throttling device, two ends of the freezing throttling device are connected in parallel with at least one non-freezing branch for providing cold energy for the at least one non-freezing compartment respectively, and the compression refrigeration system further comprises a switching valve for conducting one branch of the freezing throttling device and the at least one non-freezing branch;
before the automatic shutdown condition is reached, the refrigeration and freezing device is in a non-refrigeration compartment refrigeration state, and the refrigerating fan is in a stop state in the non-refrigeration compartment refrigeration state; and is also provided with
The step of increasing the humidity in the freezing compartment to the preset maximum humidity includes:
controlling the switching valve to switch to a state of conducting the refrigeration throttling device;
starting the refrigerating fan;
the compressor is controlled to operate at a frequency lower than its first set frequency when in a refrigerated compartment refrigeration state such that the evaporator temperature of the refrigerated evaporator is higher than the compartment temperature within the refrigerated compartment.
Optionally, the step of controlling the compressor to operate at a frequency lower than its first set frequency in the refrigerated compartment refrigeration state such that the evaporator temperature of the refrigerated evaporator is higher than the compartment temperature within the refrigerated compartment comprises:
controlling the compressor to operate at a frequency lower than a first set frequency thereof in a refrigerating state of the refrigerating compartment;
acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;
calculating a temperature difference value between the evaporator temperature and the inter-chamber temperature;
if the temperature difference value between the evaporator temperature and the room temperature is larger than or equal to a preset minimum temperature difference, keeping the running frequency of the compressor unchanged, and returning to continuously acquire the humidity in the freezing room;
if the temperature difference value between the evaporator temperature and the compartment temperature is smaller than the preset minimum temperature difference, the operation frequency of the compressor is reduced, and the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment are returned to be continuously obtained; wherein the method comprises the steps of
The preset minimum temperature difference is greater than zero.
Optionally, the preset minimum temperature difference is any temperature difference in the range of 2-4 ℃.
Optionally, the amplitude of each decrease in the operating frequency of the compressor is the same.
Optionally, the operating frequency of the compressor is reduced at a time with an amplitude of 2 to 20 hz.
Optionally, the preset maximum humidity is any relative humidity value ranging from 80% to 100%.
Optionally, the automatic shutdown condition is that the temperature of each storage compartment of the refrigeration and freezing device reaches the respective set temperature.
According to a second aspect of the present invention there is also provided a refrigeration and freezing apparatus comprising a cabinet defining a freezer compartment, a refrigeration fan for driving an air supply into the freezer compartment, and a compression refrigeration system having a compressor, 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.
The control method of the invention does not stop the compressor and the refrigerating fan immediately when the refrigerating and freezing device reaches the preset automatic shutdown condition, but stops the compressor and the refrigerating fan after the humidity in the refrigerating compartment is increased to the preset highest humidity. That is, the refrigerating and freezing device is stopped after the humidity in the freezing chamber is increased to the preset maximum humidity before the refrigerating and freezing device is stopped. After the machine is stopped, the humidity in the freezing chamber is not reduced and rises even slowly, so that the humidity in the freezing chamber can be maintained at a higher level of the preset highest humidity during the machine stopping period, and the problem that the food preservation effect is affected due to lower humidity in the freezing chamber is avoided.
Further, the temperature difference value between the evaporator temperature and the room temperature in the freezing room is monitored by acquiring the evaporator temperature of the freezing evaporator and the room temperature in the freezing room, and the operation frequency of the compressor is gradually and slowly reduced, so that the evaporator temperature of the freezing evaporator is higher than the room temperature in the freezing room, external water vapor entering the freezing room through the door seal, moisture (such as food material volatilized moisture) in the freezing room, frost sublimated moisture on the freezing evaporator and the like can be kept in the freezing room, the humidity in the freezing room is improved, and the large influence on the temperature of the freezing room caused by the excessive temperature rise of the freezing evaporator due to the excessive operation frequency of the compressor can be avoided.
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 compression 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 increasing the humidity in the freezer compartment to a preset maximum humidity in accordance with one embodiment of the invention;
fig. 5 is a schematic flow chart of a control method of a refrigerating and freezing apparatus according to another embodiment of the present 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 compression refrigerating system of the refrigerating and freezing apparatus according to an embodiment of the present invention.
Referring to fig. 1 and 2, a refrigerating and freezing apparatus 1 of the present invention includes a cabinet 10 defining a freezing compartment 11, a freezing blower 31 for driving air supply into the freezing compartment 11, and a compression refrigeration system 20 having a compressor 21. Further, the compression refrigeration system 20 comprises a refrigeration branch comprising a refrigeration evaporator 22 and a refrigeration throttle 23, and a condenser 29 connected in series with the compressor 21. Specifically, the freeze-throttle 23 may be a capillary tube, a throttle valve, or the like.
The inventors have recognized that during refrigeration of the refrigerated compartment 11, the evaporator temperature of the refrigerated evaporator 22 must be lower than the compartment temperature of the refrigerated compartment 11 to have the ability to cool 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 22, and the humidity in the freezing compartment 11 is inevitably lowered. When the temperature in the freezing compartment 11 reaches the set temperature and stops, the temperature in the freezing compartment 11 is almost minimized. Although the humidity in the freezing compartment 11 increases slowly after the machine is stopped, the rate of humidity increase is slow, and the food material in the freezing compartment 11 is still in a low humidity environment for a long time, and the preservation quality is poor.
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 reaches a preset automatic shutdown condition, acquiring the humidity in the freezing compartment 11;
if the humidity in the freezing compartment 11 is higher than or equal to the preset maximum humidity, the compressor 21 and the freezing blower 31 are controlled to stop running; that is, when the humidity in the freezing compartment 11 is higher than or equal to the preset maximum humidity, the machine is directly stopped;
if the humidity in the freezing compartment 11 is lower than the preset maximum humidity, the compressor 21 and the refrigerating fan 31 are controlled to stop operating after the humidity in the freezing compartment 11 is increased to the preset maximum humidity.
The control method of the present invention does not stop the compressor 21 and the freezing blower 31 immediately when the refrigerating and freezing apparatus 1 reaches the preset automatic shutdown condition, but stops the compressor 21 and the freezing blower 31 after increasing the humidity in the freezing compartment 11 to the preset maximum humidity. That is, the refrigerating compartment 11 is first increased in humidity to a preset maximum humidity before the refrigerating and freezing apparatus 1 is stopped. After the shutdown, the humidity in the freezing chamber 11 is not reduced and rises even slowly, so that the humidity in the freezing chamber 11 can be maintained at a higher level of the preset highest humidity during the shutdown, and the influence on the preservation effect of food due to the lower humidity in the freezing chamber 11 after the shutdown is avoided.
The control method of the invention regulates the humidity in the freezing compartment 11 before stopping, does not need to start the compressor 21 again for humidification operation after stopping, and avoids damage to the compressor 21 caused by frequent start and stop.
In addition, the invention realizes the purpose of improving the humidity in the refrigerating chamber 11 by controlling the downtime and the running frequency of the compressor 21 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 the 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, judging whether the refrigerating and freezing device 1 reaches a preset automatic shutdown condition; if yes, go to step S20, if not, return to and continue to judge;
step S20, acquiring the humidity in the freezing compartment 11;
step S30, judging whether the humidity in the freezing compartment 11 is lower than the preset highest humidity, if yes, turning to step S40, otherwise turning to step S50;
step S40, the humidity in the freezing compartment 11 is increased to the preset highest humidity;
in step S50, the compressor 21 and the freezing blower 31 are controlled to stop operating.
In some embodiments, the refrigeration and freezer 1 is in a refrigerated compartment refrigerated state prior to reaching an auto shut down condition; in the refrigerating state of the refrigerating compartment 11, the refrigerating fan 31 is in an operating state, and the refrigerant flows through the refrigerating evaporator 22 and the refrigerating throttle device 23.
Specifically, if the refrigerating and freezing apparatus 1 includes only the refrigerating compartment 11, the refrigerating and freezing apparatus 1 must be in a refrigerating state of the refrigerating compartment before the automatic shutdown condition is reached.
If the refrigerating and freezing apparatus 1 includes at least one non-freezing compartment, such as a refrigerating compartment and a temperature changing compartment, in addition to the freezing compartment 11, the refrigerating and freezing apparatus 1 is generally operated in the order of refrigerating compartment cooling, temperature changing compartment cooling and freezing compartment cooling. Namely, when the refrigeration of the refrigerating compartment begins, the refrigeration of the refrigerating compartment and the refrigeration of the temperature-changing compartment are usually carried out; that is, the refrigerating and freezing apparatus 1 is generally in a refrigerating compartment refrigerating state before the auto-off condition is reached.
In these embodiments, the step S40 of increasing the humidity in the freezing compartment 11 to the preset maximum humidity may specifically include:
the freezing blower 31 is maintained in an operating state and the compressor 21 is controlled to operate at a frequency lower than its first set frequency in the freezing compartment refrigeration state so that the evaporator temperature of the freezing evaporator 22 is higher than the compartment temperature in the freezing compartment 11.
The freezing blower 31 is operated to cause the air flow to circulate between the freezing evaporator 22 and the freezing compartment 11, and since the evaporator temperature of the freezing evaporator 22 is higher than the compartment temperature in the freezing compartment 11, external moisture entering the freezing compartment 11 through the door seal, moisture in the freezing compartment 11 (e.g., moisture volatilized from food materials), and moisture sublimated from frost on the freezing evaporator 22 are condensed in the freezing compartment 11 having a lower temperature rather than at the freezing evaporator 22, whereby the moisture content in the freezing compartment 11 can be effectively increased, and the humidity in the freezing compartment 11 can be increased to a preset maximum humidity.
In some embodiments, at least one non-freezing compartment is further defined in the case 10, the compression refrigeration system 20 further comprises a freezing branch connected in series with the compressor 21, the freezing branch comprises a freezing evaporator 21 and a freezing throttling device 23, at least one non-freezing branch for providing cold to the at least one non-freezing compartment is connected in parallel to both ends of the freezing throttling device 23, and the compression refrigeration system 20 further comprises a switching valve 24 for conducting one of the freezing throttling device 23 and the at least one non-freezing branch.
In particular, the at least one non-freezing compartment may comprise a refrigerated compartment 12, the at least one non-freezing leg may comprise a refrigeration leg for providing cold to the refrigerated compartment 12, the refrigeration leg comprising a refrigeration evaporator 25 and a refrigeration throttle 26 connected in series, the refrigeration throttle 26 may be a capillary tube or a throttle valve or the like. The at least one non-freezing compartment may further comprise a temperature change compartment 13, the at least one non-freezing leg may further comprise a temperature change leg for providing cooling to the temperature change compartment 13, the temperature change leg comprising a temperature change evaporator 27 and a temperature change throttling means 28 connected in series, the temperature change throttling means 28 may be a capillary tube or a throttle valve or the like.
In these embodiments, the refrigeration and freezer 1 may be in a non-refrigerated compartment refrigerated state prior to reaching the auto shut down condition; in the non-freezing compartment cooling state, the freezing blower 31 is in a stopped state; refrigerant flows through the non-freezing branch corresponding to the non-freezing compartment.
Further, referring to the schematic flow chart of fig. 4 for increasing the humidity in the freezing compartment 11 to the preset maximum humidity according to one embodiment of the present invention, the step S40 for increasing the humidity in the freezing compartment 11 to the preset maximum humidity may specifically include:
step S41, controlling the switching valve 24 to switch to a state of turning on the refrigeration throttle 23;
step S42, starting the refrigerating fan 31;
in step S43, the compressor 21 is controlled to operate at a frequency lower than its first set frequency in the refrigerating compartment refrigeration state such that the evaporator temperature of the freezing evaporator 22 is higher than the compartment temperature in the freezing compartment 11.
Also, the freezing blower 31 is operated to cause the air flow to circulate between the freezing evaporator 22 and the freezing compartment 11, and since the evaporator temperature of the freezing evaporator 22 is higher than the compartment temperature in the freezing compartment 11, the outside moisture entering the freezing compartment 11 through the door seal, the moisture in the freezing compartment 11 (e.g., the moisture volatilized from the food material), and the moisture formed by sublimation of the frost on the freezing evaporator 22 are condensed in the freezing compartment 11 having a lower temperature rather than at the freezing evaporator 22, whereby the moisture content in the freezing compartment 11 can be effectively increased, and the humidity in the freezing compartment 11 can be increased to a preset maximum humidity.
Fig. 5 is a schematic flow chart of a control method of a refrigerating and freezing apparatus according to another embodiment of the present invention. In some embodiments, the step of controlling the compressor 21 to operate at a frequency lower than its first set frequency in the refrigerated compartment refrigeration state such that the evaporator temperature of the refrigerated evaporator 22 is higher than the compartment temperature within the refrigerated compartment 11 may specifically include:
step S431 of controlling the compressor 21 to operate at a frequency lower than the first set frequency thereof in the refrigerating state of the refrigerating compartment;
step S432, acquiring the evaporator temperature of the freezing evaporator 22 and the compartment temperature in the freezing compartment 11;
step S433, calculating a temperature difference value between the evaporator temperature and the intermediate temperature;
step S434, judging whether the temperature difference value between the evaporator temperature and the intermediate temperature is smaller than the preset minimum temperature difference; if yes, go to step S435, if no, go to step S436;
step S435, decreasing the operation frequency of the compressor 21, and returning to step S422;
step S436, the operation frequency of the compressor 21 is kept unchanged, and step S20 is returned.
Wherein the preset minimum temperature difference is greater than zero. That is, it is necessary to ensure that the temperature difference between the evaporator temperature and the compartment temperature is positive, i.e., that the evaporator temperature of the freezing evaporator 22 is greater than the compartment temperature within the freezing compartment 11.
According to the invention, by acquiring the evaporator temperature of the freezing evaporator 22 and the compartment temperature in the freezing compartment 11 and monitoring the temperature difference value between the evaporator temperature and the compartment temperature, the running frequency of the compressor 21 is gradually and slowly reduced, so that the evaporator temperature of the freezing evaporator 22 is higher than the compartment temperature in the freezing compartment 11, moisture and the like can be kept in the freezing compartment to improve the humidity in the freezing compartment, and the problem that the temperature of the freezing compartment 11 is greatly influenced by the excessive temperature rise of the freezing evaporator 22 caused by the excessive running frequency of the compressor 21 at one time can be avoided.
In some embodiments, the predetermined minimum temperature difference may be any temperature difference ranging from 2 to 4 ℃. For example, the preset minimum temperature difference may take the value of 2 ℃, 2.5 ℃, 3 ℃, 3.5 ℃ or 4 ℃. That is, when the evaporator temperature of the freezing evaporator 22 is 2 to 4 ℃ higher than the room temperature in the freezing room 11, not only a good humidification effect can be obtained in the freezing room 11, but also a large influence on the temperature in the freezing room 11 is not exerted.
In some embodiments, the amplitude of each decrease in the operating frequency of the compressor 21 is the same. That is, the operation frequency of the compressor 21 is reduced uniformly, and the control is easy.
Specifically, the operating frequency of the compressor 21 may be reduced by a range of 2 to 20 hz at a time to find an operating frequency of the compressor 21 that can increase the humidity in the freezing compartment 11 as much as possible and has the least influence on the temperature in the freezing compartment 11. For example, the operating frequency of the compressor 21 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.
In some embodiments, the predetermined maximum humidity may be any relative humidity value ranging from 80% to 100%. For example, the preset maximum humidity may take the value 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 100%. That is, before the shutdown, it is necessary to raise the humidity in the freezer compartment 11 to a higher level of 80% or more and then shutdown, to ensure that the humidity in the freezer compartment 11 is stably maintained at the higher level during the shutdown.
In some embodiments, the automatic shutdown condition is that the temperature of each storage compartment of the refrigeration and freezing apparatus 1 reaches its respective set temperature.
Specifically, if the refrigerating and freezing apparatus 1 includes only the freezing compartment 11, the automatic shutdown condition is that the freezing compartment 11 reaches the freezing set temperature.
Specifically, if the refrigerating and freezing apparatus 1 includes at least one non-freezing compartment other than the freezing compartment 11, for example, a refrigerating compartment 12 and a temperature changing compartment 13, the automatic shutdown condition is that the refrigerating compartment 12 reaches a refrigerating set temperature, the temperature changing compartment 13 reaches a temperature changing set temperature, and the freezing compartment 11 reaches a freezing set temperature.
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 fan 31 for driving air supply into the freezing compartment 11, and a compression refrigeration system 20 having a compressor 21.
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 21 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 refrigerating and freezing apparatus 1 of the present invention does not stop the compressor 21 and the freezing blower 31 immediately when the preset automatic shutdown condition is reached, but stops the compressor 21 and the freezing blower 31 after the humidity in the freezing compartment 11 is increased to the preset maximum humidity. That is, the refrigerating compartment 11 is first increased in humidity to a preset maximum humidity before the refrigerating and freezing apparatus 1 is stopped. After the shutdown, the humidity in the freezing chamber 11 is not reduced and rises even slowly, so that the humidity in the freezing chamber 11 can be maintained at a higher level of the preset highest humidity during the shutdown, and the influence on the preservation effect of food due to the lower humidity in the freezing chamber 11 after the shutdown is avoided.
The refrigerating and freezing device 1 of the invention regulates the humidity in the freezing compartment 11 before stopping, does not need to start the compressor 21 again for humidifying operation after stopping, and avoids damage to the compressor 21 caused by frequent starting and stopping.
In addition, the invention realizes the purpose of improving the humidity in the refrigerating chamber 11 by controlling the downtime and the running frequency of the compressor 21 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 the storage capacity of the refrigerating and freezing device 1 and improving the feasibility of practical application.
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 also 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 device, the refrigerating and freezing device comprising a box body defining a freezing compartment, a freezing fan for driving air supply into the freezing compartment, and a compression refrigerating system with a compressor; the control method comprises the following steps:
when the refrigerating and freezing device reaches a preset automatic shutdown condition, acquiring the humidity in the freezing compartment;
if the humidity in the freezing compartment is higher than or equal to the preset highest humidity, controlling the compressor and the freezing fan to stop running;
if the humidity in the freezing compartment is lower than the preset highest humidity, the humidity in the freezing compartment is increased to the preset highest humidity, and then the compressor and the refrigerating fan are controlled to stop running.
2. The control method of claim 1, wherein the compression refrigeration system comprises a refrigeration branch connected in series with the compressor, the refrigeration branch comprising a refrigeration evaporator and a refrigeration throttling device;
before the automatic shutdown condition is reached, the refrigerating and freezing device is in a refrigerating chamber refrigerating state, and the refrigerating fan is in an operating state in the refrigerating chamber refrigerating state; and is also provided with
The step of increasing the humidity in the freezing compartment to the preset maximum humidity includes:
the refrigeration blower is maintained in an operating state and the compressor is controlled to operate at a frequency lower than a first set frequency thereof in a refrigeration state of the refrigeration compartment so that an evaporator temperature of the refrigeration evaporator is higher than a compartment temperature in the refrigeration compartment.
3. The control method of claim 1, wherein the tank further defines at least one non-freezing compartment therein, the compression refrigeration system further comprising a freezing branch connected in series with the compressor, the freezing branch comprising a freezing evaporator and a freezing throttling device, the freezing throttling device having two ends connected in parallel with at least one non-freezing branch for providing cooling capacity to the at least one non-freezing compartment, respectively, the compression refrigeration system further comprising a switching valve for conducting one of the freezing throttling device and the at least one non-freezing branch;
before the automatic shutdown condition is reached, the refrigeration and freezing device is in a non-refrigeration compartment refrigeration state, and the refrigerating fan is in a stop state in the non-refrigeration compartment refrigeration state; and is also provided with
The step of increasing the humidity in the freezing compartment to the preset maximum humidity includes:
controlling the switching valve to switch to a state of conducting the refrigeration throttling device;
starting the refrigerating fan;
the compressor is controlled to operate at a frequency lower than its first set frequency when in a refrigerated compartment refrigeration state such that the evaporator temperature of the refrigerated evaporator is higher than the compartment temperature within the refrigerated compartment.
4. A control method according to claim 2 or 3, wherein the step of controlling the compressor to operate at a frequency lower than a first set frequency thereof in a refrigerating compartment cooling state such that an evaporator temperature of the refrigerating evaporator is higher than a compartment temperature in the refrigerating compartment comprises:
controlling the compressor to operate at a frequency lower than a first set frequency thereof in a refrigerating state of the refrigerating compartment;
acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;
calculating a temperature difference value between the evaporator temperature and the inter-chamber temperature;
if the temperature difference value between the evaporator temperature and the room temperature is larger than or equal to a preset minimum temperature difference, keeping the running frequency of the compressor unchanged, and returning to continuously acquire the humidity in the freezing room;
if the temperature difference value between the evaporator temperature and the compartment temperature is smaller than the preset minimum temperature difference, the operation frequency of the compressor is reduced, and the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment are returned to be continuously obtained; wherein the method comprises the steps of
The preset minimum temperature difference is greater than zero.
5. The control method according to claim 4, wherein,
the preset minimum temperature difference is any temperature difference value ranging from 2 ℃ to 4 ℃.
6. The control method according to claim 4, wherein,
the amplitude of each decrease in the operating frequency of the compressor is the same.
7. The control method according to claim 6, wherein,
the operating frequency of the compressor is reduced at a time with an amplitude of 2 to 20 hz.
8. The control method according to claim 1, wherein,
the preset maximum humidity is any relative humidity value ranging from 80% to 100%.
9. The control method according to claim 1, wherein,
the automatic shutdown condition is that the temperature of each storage compartment of the refrigeration and freezing device reaches the respective set temperature.
10. A refrigeration and chiller apparatus including a cabinet defining a freezer compartment, a refrigeration fan for driving an air supply into the freezer compartment, and a compression refrigeration system having a compressor, the refrigeration and chiller 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 |
|---|---|---|---|
| CN202210038853.9A CN116481232A (en) | 2022-01-13 | 2022-01-13 | Refrigerating and freezing device and control method thereof |
| PCT/CN2023/070735 WO2023134541A1 (en) | 2022-01-13 | 2023-01-05 | Refrigerating and freezing apparatus and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210038853.9A CN116481232A (en) | 2022-01-13 | 2022-01-13 | Refrigerating and freezing device and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116481232A true CN116481232A (en) | 2023-07-25 |
Family
ID=87223700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210038853.9A Pending CN116481232A (en) | 2022-01-13 | 2022-01-13 | Refrigerating and freezing device and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116481232A (en) |
-
2022
- 2022-01-13 CN CN202210038853.9A patent/CN116481232A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021238215A1 (en) | Control method and device for air conditioner outdoor unit, air conditioner outdoor unit, and air conditioner | |
| CN105371557B (en) | A kind of refrigerator and controlling method for refrigerator | |
| JP2006250378A (en) | Cooling storage | |
| JP4334971B2 (en) | Cooling storage | |
| JPWO2018038023A1 (en) | Control device, program, control method of refrigerator, and refrigerator | |
| WO2024045573A1 (en) | Refrigerator temperature control method and single-temperature-control air-cooled refrigerator | |
| CN116481232A (en) | Refrigerating and freezing device and control method thereof | |
| WO2023134541A1 (en) | Refrigerating and freezing apparatus and control method therefor | |
| KR20140144020A (en) | Motor control method of refrigerator and apparatus thereof | |
| CN116481230A (en) | Refrigerating and freezing device and control method thereof | |
| CN116481231A (en) | Refrigerating and freezing device and control method thereof | |
| WO2022267772A1 (en) | Refrigeration and freezing apparatus control method, and refrigeration and freezing apparatus | |
| WO2022267774A1 (en) | Control method for refrigerating and freezing apparatus, and refrigerating and freezing apparatus | |
| CN116499173A (en) | Refrigerating and freezing device and control method thereof | |
| CN116447795A (en) | Refrigerating and freezing device and control method thereof | |
| WO2023142952A1 (en) | Refrigerating and freezing device and control method therefor | |
| CN116538735A (en) | Refrigerating and freezing device and control method thereof | |
| WO2022267773A1 (en) | Control method for refrigerating and freezing apparatus, and refrigerating and freezing apparatus | |
| EP4361535A1 (en) | Refrigerating and freezing apparatus control method, and refrigerating and freezing apparatus | |
| CN116499172A (en) | Refrigerating and freezing device and control method thereof | |
| CN116538736A (en) | Refrigerating and freezing device and control method thereof | |
| WO2022267776A1 (en) | Control method for refrigerating and freezing apparatus, and refrigerating and freezing apparatus | |
| CN116499174A (en) | Refrigerating and freezing device and control method thereof | |
| WO2023138377A1 (en) | Refrigerating and freezing device and control method therefor | |
| WO2023138319A1 (en) | Refrigerating and freezing apparatus and control method therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |