CN114812035A - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN114812035A CN114812035A CN202110130458.9A CN202110130458A CN114812035A CN 114812035 A CN114812035 A CN 114812035A CN 202110130458 A CN202110130458 A CN 202110130458A CN 114812035 A CN114812035 A CN 114812035A
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- 238000007710 freezing Methods 0.000 abstract description 47
- 230000008014 freezing Effects 0.000 abstract description 47
- 238000005057 refrigeration Methods 0.000 abstract description 22
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
The invention provides a refrigerator and a control method thereof, the refrigerator comprises a storage compartment for storing food to be frozen and an evaporator, the evaporator is configured to supply cold to the storage compartment when the evaporator runs, and the control method comprises the following steps: acquiring a trigger event for opening and closing the storage compartment; after the storage chamber is opened and closed, the evaporator is operated to supply cold to the storage chamber; calculating a first falling rate of the temperature of the storage chamber within a first preset time; and adjusting the defrosting starting time according to the first descending rate. So can judge whether indoor new food of storing room is put into according to the falling rate of storing room, further adjust and change the frost start time to avoid new food by the freezing in-process, the refrigerator changes the frost and influences the refrigeration effect of new food, thereby guarantees the fresh-keeping effect of food.
Description
Technical Field
The invention relates to the technical field of cold storage cold end storage, in particular to a refrigerator and a control method thereof.
Background
When the temperature of the center of most frozen foods is reduced from-1 ℃ to-5 ℃, nearly 80% of water can be frozen into ice, the temperature interval is called as the maximum ice crystal generation zone, and most ice crystals are formed between-1 ℃ and-5 ℃. The maximum ice crystal formation zone is the most important temperature interval for ensuring the quality of frozen food.
The way in which ice crystals are generated within the zone of maximum ice crystal generation has a major impact on the quality of the food product. When the refrigerator freezes the food, the shorter the time for the food to pass through the maximum ice crystal generation zone, the better the quality.
However, if the refrigerator defrosts during the generation of the ice crystal zone, the temperature in the compartment is greatly increased by the operation of the defrosting heating wire, which results in a long time for the food to pass through the ice crystal zone and affects the fresh-keeping effect.
The existing refrigerator generally carries out defrosting according to a preset defrosting period, and an ice crystal band of food is possibly overlapped with defrosting in the generation period to influence the formation of the ice crystal band, so that the fresh-keeping effect is not obvious.
Disclosure of Invention
An object of the present invention is to provide a refrigerator and a control method thereof that solve at least the above problems.
A further object of the present invention is to balance the freshness of food products with the defrosting requirements of the evaporator.
According to an aspect of the present invention, there is provided, in the first place, a control method of a refrigerator including a storage compartment for storing food to be frozen and an evaporator configured to supply cold to the storage compartment when the evaporator is operated, the control method including:
acquiring a trigger event of opening and closing the storage compartment;
after the storage compartment is opened and closed, operating the evaporator to supply cold to the storage compartment;
calculating a first falling rate of the temperature of the storage chamber within a first preset time;
and adjusting the defrosting starting time according to the first reduction rate.
Optionally, the step of adjusting the defrosting start time according to the first reduction rate includes:
if the first reduction rate is equal to or greater than a first preset rate reduction threshold, determining defrosting starting time according to an original defrosting period;
and if the first reduction rate is smaller than the first preset rate reduction threshold, adjusting the defrosting starting time according to the time difference between the current time and the next defrosting time.
Optionally, the step of adjusting the defrosting start time according to the time difference between the current time and the next defrosting time includes:
if the time difference is equal to or smaller than a first preset time difference, stopping running the evaporator and starting defrosting;
the control method further comprises the following steps:
and after defrosting is finished, operating the evaporator.
Optionally, the step of adjusting the defrosting start time according to the time difference between the current time and the next defrosting time further includes:
and if the time difference is equal to or greater than a second preset time difference, determining defrosting starting time according to the original defrosting period, wherein the second preset time difference is greater than the first preset time difference.
Optionally, the control method further includes:
calculating a second falling rate of the temperature of the storage chamber within a second preset time, wherein the second preset time is longer than the first preset time;
and if the time difference is between the first preset time difference and the second preset time difference, adjusting the defrosting starting time according to the second descending rate.
Optionally, the step of adjusting the defrosting start time according to the second decrease rate includes:
if the second descending rate is equal to or greater than a second preset rate descending threshold value, starting defrosting when the distance from the current third preset time is less than a second preset time;
the second preset rate decrease threshold is smaller than the first preset rate decrease threshold, and the third preset time is equal to or greater than the second preset time difference.
Optionally, the step of adjusting the defrosting start time according to the second decrease rate includes:
if the second descending rate is smaller than the second preset rate descending threshold, stopping running the evaporator and starting defrosting;
the control method further comprises the following steps:
and after defrosting is finished, operating the evaporator.
According to another aspect of the present invention, there is also provided a refrigerator including
The storage chamber is used for storing food to be frozen;
an evaporator configured to supply cold to the storage compartment when it is operating;
a controller having a memory and a processor, and a computer program stored in the memory, the computer program being for implementing a control method of the refrigerator according to any one of claims 1 to 7 when executed by the processor.
Optionally, the refrigerator further comprises:
an open/close detection device for the storage compartment, configured to detect the open/close state of the storage compartment;
and the temperature sensor is configured to detect the temperature of the storage compartment.
Optionally, the storage compartment is a cryogenic compartment.
According to the refrigerator and the control method thereof, whether new food is put into the storage chamber or not is judged within a certain time according to the temperature reduction degree after the storage chamber is closed, a clear judgment condition is provided for judging whether the new food is put into the storage chamber, the defrosting starting time is adjusted according to the time which is far away from the next defrosting when the food is judged to be put into the storage chamber, and meanwhile, the fresh-keeping effect and the defrosting requirement of the food are guaranteed.
Further, the refrigerator and the control method thereof judge whether newly-placed food exists or not according to the temperature reduction degree within a certain time after the storage chamber is closed, and adjust the defrosting starting time according to the time difference between the time after the storage chamber is closed and the next defrosting time and the quantity of the newly-placed food, so that the freezing requirement of the newly-placed food and the defrosting requirement of the evaporator are balanced, the time for the food to pass through the maximum ice crystal formation zone is shortened, the fresh-keeping effect of the food is ensured, the problem of reduction of the refrigerating efficiency caused by long-time non-defrosting of the evaporator is avoided, and the refrigerating effect of the evaporator is ensured.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic view of a control method of a refrigerator according to one embodiment of the present invention;
fig. 2 is a flowchart of a control method of a refrigerator according to one embodiment of the present invention;
fig. 3 is a schematic structural view of a refrigerator according to one embodiment of the present invention; and
fig. 4 is a block diagram of a refrigerator according to an embodiment of the present invention.
Detailed Description
The present embodiment first provides a control method of a refrigerator 10, the refrigerator 10 generally including a locker room 110 storing food to be frozen and an evaporator 160 configured to supply cold to the locker room 110 when it is operated.
Fig. 1 is a schematic diagram of a control method of a refrigerator 10 according to one embodiment of the present invention. As shown in fig. 1, the control method of the present embodiment includes:
and S202, acquiring a trigger event for opening and closing the storage compartment 110.
The refrigerator 10 may detect the open/closed state of the storage compartment 110 by the storage compartment open/close detection device 170, and the storage compartment open/close detection device 170 generates a trigger event that the storage compartment 110 is opened/closed when detecting that the storage compartment 110 is opened/closed.
The storage compartment 110 of the refrigerator 10 can be opened and closed by a compartment door body, the compartment door body can be a rotating shaft door body or a drawer type door panel, the storage compartment opening and closing detection device 170 can be a hall switch, a magnetic sensor and the like, and the storage compartment opening and closing detection device 170 determines the opening and closing state of the storage compartment 110 by detecting the opening and closing of the compartment door body.
S204, after the locker room 110 is opened and closed, the evaporator 160 is operated to supply cold to the locker room 110.
When compartment 110 is opened or closed, hot ambient air enters compartment 110, which increases the temperature of compartment 110, and new food to be frozen may be placed in compartment 110.
In order to avoid the influence of the temperature increase of the storage compartment 110 on the stored food and timely reduce the temperature of the newly-placed food to be frozen, the controller 150 of the refrigerator 10 controls the operation of the evaporator 160, that is, turns on the compressor after receiving the information that the storage compartment 110 is opened or closed, which is sent by the storage compartment opening and closing detection device 170, so that the compressor is communicated with the evaporator 160 to implement the compression refrigeration cycle of the refrigerant.
The evaporator 160 may supply cold to the storage compartment 110 in a direct cooling or air cooling manner, and may reduce the temperature of the storage compartment 110 to ensure the preservation effect of the stored food.
S206, calculating a first falling rate of the temperature of the storage compartment 110 in a first preset time.
The temperature sensor 180 is arranged in the storage compartment 110, the temperature sensor 180 can collect the temperature of the storage compartment 110 in real time or at certain intervals, for example, the temperature is collected every 2 seconds, the temperature sensor 180 sends the collected temperature data to the controller 150, and the controller 150 calculates a first decrease rate of the temperature of the storage compartment 110 within a first preset time.
And S208, adjusting the defrosting starting time according to the first descending rate.
When a new food to be frozen is placed in the storage compartment 110 in the process of opening and closing the storage compartment 110, the new food to be frozen is usually at normal temperature or is subjected to heat treatment, the temperature of the new food to be frozen is higher than that of the storage compartment 110, and heat is released into the storage compartment 110 to exchange heat with cold air entering the storage compartment 110, so that the temperature decrease rate of the storage compartment 110 is slow.
Therefore, whether new food is put into the storage chamber 110 can be judged according to the descending rate of the storage chamber 110, and the defrosting starting time is further adjusted to avoid the influence on the freezing effect of the new food caused by defrosting of the refrigerator 10 in the process that the new food is frozen, so that the preservation effect is influenced.
In one embodiment, in step S208, the step of adjusting the defrosting start time according to the first decreasing rate may specifically include:
if the first reduction rate is equal to or greater than a first preset rate reduction threshold, determining defrosting starting time according to the original defrosting period;
and if the first reduction rate is smaller than a first preset rate reduction threshold, adjusting the defrosting starting time according to the time difference between the current time and the next defrosting time.
When the temperature drop degree of the storage compartment 110 within a certain time after being closed is greater than a certain threshold, it indicates that the temperature drop rate of the storage compartment 110 is fast, no new food is put into the storage compartment 110, at this time, the refrigerator 10 can keep the original defrosting start time, and according to the original defrosting cycle, when the defrosting time is reached, the defrosting is started, so as to ensure timely defrosting of the evaporator 160.
When the temperature drop degree of the storage compartment 110 in the first time after being closed is smaller than the threshold, it indicates that the temperature drop rate of the storage compartment 110 is relatively slow, new food is put into the storage compartment 110 in the process of being opened and closed, at this time, the defrosting start can be adjusted according to the time difference between the current time and the next defrosting time, that is, the time difference between the current time and the next defrosting time is calculated according to the original defrosting period, and the defrosting start time is adjusted according to the time difference to provide sufficient time for the freezing process of the newly-put food, and guarantee the defrosting demand of the evaporator 160, thereby not only guaranteeing the fresh-keeping effect of the food, but also meeting the defrosting demand.
After the refrigerator 10 of this embodiment is closed according to the storing compartment 110, the temperature drop degree judges whether new food is put into the storing compartment 110 within a certain time, and whether the new food is put into the refrigerator, and when judging that food is put into the refrigerator, the time of starting defrosting is adjusted according to the time of next defrosting, and the fresh-keeping effect and the defrosting requirement of food are guaranteed simultaneously.
The first preset time and the first preset rate decrease threshold may be determined through experiments, for example, the first preset time may be 10min, and the first preset rate decrease threshold may be 0.1K/min, which is only an example, and this embodiment is not limited thereto.
The step of adjusting the defrosting starting time according to the time difference between the current distance and the next defrosting time comprises the following steps:
if the time difference is equal to or less than the first preset time difference, the operation of the evaporator 160 is stopped, defrosting is started, and after defrosting is finished, the evaporator 160 is operated.
When the defrosting time is shorter than the next time, the time period is far shorter than the time required by the freezing process of the newly-put food, at this time, if the evaporator 160 is continuously operated to implement the freezing control of the newly-put food, according to the original defrosting period, the newly-put food is subjected to the reduction of the freezing quality caused by the defrosting of the evaporator 160 at the initial freezing stage; if the original defrosting period is changed, the defrosting needs to be started after the food is newly put in the food and is frozen, which greatly prolongs the defrosting period, and the evaporator 160 has a thick frost layer to affect the refrigeration effect.
Therefore, in order to avoid the above problems, when the next defrosting time is short, the compressor is controlled to stop, the evaporator 160 does not refrigerate, and meanwhile, the defrosting program of the evaporator 160 is started, the evaporator 160 is operated after defrosting is finished, and the freezing control of the newly-placed food is implemented, so that the refrigerating effect of the evaporator 160 is ensured, and meanwhile, the freezing process of the newly-placed food is not influenced by defrosting of the evaporator 160, so that a zone can be generated quickly through the largest ice crystal, and the fresh-keeping effect is improved.
The step of adjusting the defrosting start time according to the time difference between the current distance and the next defrosting time further comprises the following steps:
and if the time difference is equal to or greater than a second preset time difference, determining defrosting starting time according to the original defrosting period, wherein the second preset time difference is greater than the first preset time difference.
When the next defrosting time is longer, the time period is longer than the time required by the freezing process of the newly-placed food, the defrosting period does not need to be changed, the freezing process of the newly-placed food cannot be affected, at the moment, the evaporator 160 continuously refrigerates, so that the freezing process of the newly-placed food can be completed before the evaporator 160 defrosts, and the newly-placed food can quickly pass through the maximum ice crystal generation zone.
The first preset time difference and the second preset time difference may be determined through experiments according to the refrigeration condition and the defrosting time of the refrigerator 10, for example, the first preset time difference may be 2h, and the second preset time difference may be 10h, which is only an example, and the present embodiment is not limited thereto.
Further, when the time difference is between the first preset time difference and the second preset time difference, if the defrosting process of the evaporator 160 may overlap with the freezing process of the newly-put food according to the original defrosting cycle, the freezing effect of the newly-put food may be affected. For this reason, the control method of the present embodiment further includes:
calculating a second falling rate of the temperature of the storage compartment 110 within a second preset time, wherein the second preset time is longer than the first preset time;
and when the time difference is between the first preset time difference and the second preset time difference, the defrosting starting time is adjusted according to the second descending rate.
In the embodiment, the falling degree of the temperature of the storage chamber 110 in a longer period of time is calculated, so that the amount of the food newly put into the storage chamber 110 can be judged, the defrosting starting time can be flexibly adjusted according to the amount of the put food, and the quick freezing requirement of the food and the timely defrosting requirement of the evaporator 160 are further balanced.
In some embodiments, the step of adjusting the defrosting start time according to the second lowering rate comprises:
if the second descending speed is equal to or greater than a second preset speed descending threshold, starting defrosting when the distance from the current third preset time is less than a second preset speed descending threshold;
the second preset rate decrease threshold is smaller than the first preset rate decrease threshold, and the third preset time is equal to or greater than the second preset time difference.
When the next defrosting time is between the first preset time difference and the second preset time difference and the temperature drop rate of the storage chamber 110 in a longer period of time is higher, it indicates that the amount of the newly-placed food is smaller, and the newly-placed food can pass through the maximum ice crystal generation zone in the third preset time, so that defrosting is started when the next defrosting time is away from the current third preset time, the freezing process of the newly-placed food cannot be affected, and timely defrosting of the evaporator 160 is ensured.
The second preset time and the second preset decreasing rate threshold may be determined through experiments according to the actual situation of the refrigerator 10, for example, the second preset time may be 30min, and the second preset rate decreasing threshold may be 0.05K/min, which is only an example, and this embodiment is not limited thereto.
The third preset time is equal to or greater than the second preset time difference, for example, the second preset time difference and the third preset time are both 10h, which is only an example, and this embodiment is not limited in this respect.
Further, the step of adjusting the defrosting start time according to the second falling rate comprises:
if the second decreasing rate is smaller than the second preset rate decreasing threshold, the operation of the evaporator 160 is stopped, defrosting is started, and after defrosting is finished, the evaporator 160 is operated again.
When the next defrosting time is between the first preset time difference and the second preset time difference and the temperature drop rate of the storage compartment 110 is slower in a longer period of time, it indicates that the amount of the newly-placed food is large, and the food does not enter the time for starting to pass through the ice crystal zone in a short time, so that the compressor is controlled to stop, the evaporator 160 does not refrigerate, the defrosting program of the evaporator 160 is started, the evaporator 160 is operated after defrosting is finished, the freezing control of the newly-placed food is implemented, and the evaporator 160 is defrosted in time, so that the refrigerating effect of the evaporator 160 is ensured, and meanwhile, the freezing process of the newly-placed food is not influenced by defrosting of the evaporator 160, and the largest ice crystal zone can be quickly passed through, so that the fresh-keeping effect is improved.
As well known to those skilled in the art, the evaporator 160 is generally provided with a defrosting heater 190, and when the controller 150 receives a signal for starting defrosting, the defrosting heater 190 is controlled to be powered on to implement defrosting operation on the evaporator 160.
Fig. 2 is a flowchart of a control method of the refrigerator 10 according to one embodiment of the present invention.
To more clearly understand the control method of the present embodiment, as shown in fig. 2, the present embodiment provides a flow of the control method of the refrigerator 10, and specifically, the control method includes:
s302, acquiring a trigger event for opening and closing the storage compartment 110;
s304, after the storage compartment 110 is closed, the compressor is started, so that the evaporator 160 refrigerates to supply cold to the storage compartment 110;
s306, calculating the falling rate of the temperature within 10min after the storage chamber 110 is closed, and recording as a first falling rate;
s308, judging whether the first reduction rate is less than 0.1K/min, if so, executing the steps S310 to S314, otherwise, executing the step S324;
s310, judging whether the time difference between the current time and the next defrosting time is between 2h and 10h, if so, executing a step S316;
s312, judging whether the time difference is equal to or less than 2h, if so, executing the step S320;
s314, judging whether the time difference is equal to or larger than 10h, if so, executing a step S324;
s316, calculating the temperature reduction rate within 30min after the storage compartment 110 is closed, and recording the temperature reduction rate as a second reduction rate;
s318, judging whether the second descending speed is less than 0.05K/min, if so, executing the step S320, and if not, executing the step S322;
s320, stopping the refrigeration of the evaporator 160, starting the defrosting heating wire 190, and starting the compressor after the defrosting is finished so that the evaporator 160 refrigerates;
s322, adjusting the starting time of next defrosting to 10 h;
and S324, determining defrosting starting time according to the original defrosting period.
Through the control method, the refrigerator 10 of the embodiment judges whether newly-placed food exists according to the temperature drop degree within a certain time after the storage compartment 110 is closed, adjusts the defrosting start time by combining the time difference between the time after the storage compartment 110 is closed and the next defrosting time and the amount of the newly-placed food, balances the freezing requirement of the newly-placed food and the defrosting requirement of the evaporator 160, shortens the time for the food to pass through the maximum ice crystal formation zone, ensures the fresh-keeping effect of the food, avoids the problem of the refrigeration efficiency reduction caused by long-time non-defrosting of the evaporator 160, and ensures the refrigeration effect of the evaporator 160.
The flowcharts provided by this embodiment are not intended to indicate that the operations of the method are to be performed in any particular order, or that all the operations of the method are included in each case. Further, the method may include additional operations. Additional variations on the above-described method are possible within the scope of the technical ideas provided by the method of this embodiment.
Fig. 3 is a schematic structural view of the refrigerator 10 according to one embodiment of the present invention, and fig. 4 is a block structural view of the refrigerator 10 according to one embodiment of the present invention.
Based on the foregoing control method of the refrigerator 10, the present embodiment also provides a refrigerator 10. The refrigerator 10 includes a controller 150, the controller 150 has a memory 151 and a processor 152, a computer program 1511 is stored in the memory 151, and the computer program 1511 is used to implement the control method of the refrigerator 10 of any of the foregoing embodiments when executed by the processor 152.
The processor 152 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The processor 152 transmits and receives data through the communication interface. The memory 151 is used to store programs executed by the processor 152. The memory 151 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, or a combination of multiple memories 151. The computer program 1511 may be downloaded from a computer-readable storage medium to a corresponding computing/processing device or via a network (e.g., the internet, a local area network, a wide area network, and/or a wireless network) to a computer or an external storage device.
The computer program 1511 may be executed entirely on the local computing device, as a stand-alone software package, partly on the local computing device and partly on a remote computing device, or entirely on a remote computing device or server (including a cloud-based device).
As described above, the refrigerator 10 further includes the storage compartment opening/closing detection device 170 configured to detect the open/closed state of the storage compartment 110, the storage compartment opening/closing detection device 170 may be a hall switch, a magnetic sensor, or the like, and the storage compartment opening/closing detection device 170 determines the open/closed state of the storage compartment 110 by detecting the opening/closing of the compartment door.
The refrigerator 10 further includes a temperature sensor 180 disposed in the storage compartment 110 and configured to collect the temperature of the storage compartment 110 at a time in real time or at a predetermined time interval.
In one embodiment, storage compartment 110 may be a freezer compartment, and in a preferred embodiment, storage compartment 110 may be a cryogenic compartment.
The temperature interval of the deep cooling chamber can be-30 to-40 ℃, and the temperature interval of the freezing chamber can be-15 to-24 ℃. The foregoing temperature ranges are merely examples, and the present invention is not particularly limited thereto.
In the conventional refrigerator 10 having the freezing compartment, the time for the food to pass through the maximum ice crystal formation zone is relatively long, and some low temperature-resistant microorganisms can grow and reproduce in the temperature range of the maximum ice crystal formation zone. In order to shorten the time for forming the food in the maximum ice crystal generation zone, the refrigerator 10 with the deep cooling chamber is designed in the embodiment, so that the food can rapidly pass through the maximum ice crystal generation zone, the time for passing through the maximum ice crystal generation zone when the food is frozen is shortened, the freezing quality of the food is improved, and the fresh-keeping effect is improved.
In the refrigerator 10 of the present embodiment, the evaporator 160 supplies cold to the storage compartment 110 in an air cooling manner, and for understanding the refrigerating process of the refrigerator 10, the compression refrigerating principle of the refrigerator 10 is described as follows.
The refrigeration system of the refrigerator 10 generally includes a compressor, a condenser, a capillary tube, a filter, and the like.
The compressor plays a role in a refrigeration system mainly by absorbing low-temperature and low-pressure refrigerant vapor from the evaporator, and finally becoming high-temperature and high-pressure vapor after adiabatic compression of the compressor.
The condenser in a refrigeration system serves to introduce high-temperature and high-pressure vapor in a compressor into the condenser, condense the refrigerant vapor at the same pressure, and dissipate the heat to the surrounding medium to turn the refrigerant vapor into a high-pressure and low-temperature refrigerant cold liquid.
The capillary tube plays a role in a refrigeration system mainly by converting high-pressure low-temperature refrigerant cold liquid into low-temperature low-pressure refrigerant steam after the refrigerant cold liquid is subjected to intermediate enthalpy throttling in the capillary tube, and then sending the refrigerant steam into an evaporator.
The evaporator mainly boils low-temperature and low-pressure refrigerant vapor passing through the capillary tube under the isobaric condition of the evaporator, and the refrigerant vapor can absorb the heat of surrounding media in the boiling process and finally becomes low-temperature and low-pressure refrigerant dry saturated vapor.
In summary, a dry saturated gas of a refrigerant in a refrigeration system is compressed into a high-temperature high-pressure superheated refrigerant vapor when passing through a compressor, the high-temperature high-pressure superheated refrigerant vapor enters a condenser through an exhaust pipe of an expansion valve piston of the compressor, the high-temperature high-pressure refrigerant vapor is condensed into a high-pressure low-temperature liquid in the condenser, the high-temperature high-pressure liquid enters a filter (not shown), the high-pressure liquid passes through a capillary tube, the medium enthalpy throttling in the capillary tube is changed into a low-temperature low-pressure refrigerant vapor, the low-temperature low-pressure refrigerant boils in an isobaric evaporator to absorb a large amount of external heat to become saturated vapor, a refrigeration process is realized, and finally the refrigerant is sucked by the compressor again to perform a cold cycle.
The aforementioned filter, not shown in the drawings, has one of its functions of filtering out foreign materials such as metal chips, various oxides, dust, etc. in the refrigeration system to prevent the foreign materials from clogging the capillary tube or damaging the compressor. The impurities come from incomplete cleaning of parts, non-strict assembly process and the like, so that the external impurities enter the refrigeration pipeline to generate chemical reaction with moisture, air or acidic substances existing in the system. Once the impurities enter the compressor, the possibility of serious abrasion and even blockage of a piston, a cylinder, a bearing and the like is caused; when people enter the position of a wiring terminal of a motor winding, the insulation of the winding coil can be damaged, and short circuit and breakdown are generated; entering the capillary tube, because the inner diameter of the capillary tube is very thin, the capillary tube is likely to cause blockage without refrigeration, and therefore, the filtration of the impurities is necessary.
The filter also has the functions of absorbing residual moisture in the refrigeration system, preventing ice blockage and reducing the corrosion of the moisture on the refrigeration system.
The refrigerator 10 of the present embodiment may further include a refrigerating compartment 120, a temperature-changing compartment 140, and a freezing compartment 130, and the positions of the refrigerating compartment 120, the temperature-changing compartment 140, the freezing compartment 130, and the deep cooling compartment may be formed in various distributions, which is not limited in the present invention.
In one embodiment, as shown, the refrigerating compartment 120 is located at the uppermost portion of the cabinet of the refrigerator 10, the warming compartment 140 and the deep cooling compartment are distributed in the lateral direction and located below the refrigerating compartment 120, and the freezing compartment 130 is located below the warming compartment 140 and the deep cooling compartment.
The front side of the refrigerating chamber 120 can be provided with a split door body, both the temperature-changing chamber 140 and the deep cooling chamber can be drawer-type structures, the freezing chamber 130 can be drawer-type structures, the volumes of the refrigerating chamber 120 and the freezing chamber 130 are larger than those of the temperature-changing chamber 140 and the deep cooling chamber, so that the use requirements of users on the refrigerating chamber 120 and the freezing chamber 130 which are most frequently used and have larger storage requirements are met, and the refrigerating chamber 120130 is positioned at the top of the refrigerator body, so that the operation of the users for storing and taking articles is facilitated.
The refrigerator 10 of the present embodiment is configured with the independent cryogenic evaporator, freezing evaporator, and refrigerating evaporator for the cryogenic chamber, the freezing chamber 130, and the refrigerating chamber 120, respectively, so that the refrigeration of the cryogenic chamber, the freezing chamber 130, and the refrigerating chamber 120 is completely independent, the variable temperature chamber 140 and the cryogenic chamber can share one cryogenic evaporator, and the temperature range of the variable temperature chamber 140 can be adjusted between the cryogenic temperature and the freezing temperature.
The refrigerator 10 of this embodiment matches suitable cryogenic capillary, freezing capillary, cold-stored capillary for cryogenic evaporator, freezing evaporator, cold-stored evaporator for the evaporating temperature of cryogenic evaporator, freezing evaporator, cold-stored evaporator satisfies the different temperature demands of cryogenic greenhouse, freezer 130, walk-in 120 respectively.
In this embodiment, the flow rate of the cryogenic capillary is smaller than that of the freezing capillary, and the flow rate of the freezing capillary is smaller than that of the refrigerating capillary, so that the cryogenic evaporator has a lower evaporation temperature, and the cryogenic temperature of the cryogenic chamber is realized, and the freezing evaporator and the refrigerating evaporator have evaporation temperatures matched with the temperature regulation sections of the freezing chamber 130 and the refrigerating chamber 120, so that the temperature regulation ranges of the freezing chamber 130 and the refrigerating chamber 120 are met, and the refrigeration efficiency is improved.
In some embodiments, the freezing evaporator, the cryogenic evaporator, and the refrigerating evaporator can respectively supply cold to the freezing chamber 130, the cryogenic chamber, and the refrigerating chamber 120 in a direct cooling manner, so as to meet the refrigeration requirements of the freezing chamber 130, the cryogenic chamber, and the refrigerating chamber 120.
In other embodiments, the freezing evaporator, the cryogenic evaporator, and the refrigerating evaporator may respectively supply cold to the freezing chamber 130, the cryogenic chamber, and the refrigerating chamber 120 in an air cooling manner, so as to meet the refrigeration requirements of the freezing chamber 130, the cryogenic chamber, and the refrigerating chamber 120.
The temperature range of the refrigerating compartment may be 1-9 ℃, and the foregoing temperature ranges are merely examples, and the present invention is not limited thereto.
In the description of the present embodiments, it is to be understood that the terms "upper", "lower", "front", "rear", "lateral", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature, i.e., one or more such features. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. When a feature "comprises or comprises" a or some of its intended features, this indicates that other features are not excluded and that other features may be further included, unless expressly stated otherwise.
Unless otherwise defined, all terms (including technical and scientific terms) used in the description of the present embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the description of the present embodiments, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A control method of a refrigerator comprising a compartment for storing food to be frozen and an evaporator configured to supply cold to the compartment when it is operated, the control method comprising:
acquiring a trigger event of opening and closing the storage compartment;
after the storage compartment is opened and closed, operating the evaporator to supply cold to the storage compartment;
calculating a first falling rate of the temperature of the storage chamber within a first preset time;
and adjusting the defrosting starting time according to the first reduction rate.
2. The control method of claim 1, the step of adjusting a defrost initiation time in accordance with the first rate of decrease comprising:
if the first reduction rate is equal to or greater than a first preset rate reduction threshold, determining defrosting starting time according to an original defrosting period;
and if the first reduction rate is smaller than the first preset rate reduction threshold, adjusting the defrosting starting time according to the time difference between the current time and the next defrosting time.
3. The control method according to claim 2, wherein the step of adjusting the defrosting start time according to the time difference from the current defrosting time to the next defrosting time comprises:
if the time difference is equal to or smaller than a first preset time difference, stopping running the evaporator and starting defrosting;
the control method further comprises the following steps:
and after defrosting is finished, operating the evaporator.
4. The control method according to claim 3, wherein the step of adjusting the defrosting start time according to the time difference between the current time and the next defrosting time further comprises:
and if the time difference is equal to or greater than a second preset time difference, determining defrosting starting time according to the original defrosting period, wherein the second preset time difference is greater than the first preset time difference.
5. The control method according to claim 4, further comprising:
calculating a second falling rate of the temperature of the storage chamber within a second preset time, wherein the second preset time is longer than the first preset time;
and if the time difference is between the first preset time difference and the second preset time difference, adjusting the defrosting starting time according to the second descending rate.
6. The control method according to claim 5, the step of adjusting the defrosting activation time according to the second lowering rate comprising:
if the second descending rate is equal to or greater than a second preset rate descending threshold value, starting defrosting when the distance from the current third preset time is less than a second preset time;
the second preset rate decrease threshold is smaller than the first preset rate decrease threshold, and the third preset time is equal to or greater than the second preset time difference.
7. The control method according to claim 6, the step of adjusting the defrosting activation time according to the second lowering rate comprising:
if the second descending rate is smaller than the second preset rate descending threshold, stopping running the evaporator and starting defrosting;
the control method further comprises the following steps:
and after defrosting is finished, operating the evaporator.
8. A refrigerator comprises
The storage chamber is used for storing food to be frozen;
an evaporator configured to supply cold to the storage compartment when it is operating;
a controller having a memory and a processor, and a computer program stored in the memory, the computer program being for implementing a control method of the refrigerator according to any one of claims 1 to 7 when executed by the processor.
9. The refrigerator of claim 8, further comprising:
an open/close detection device for the storage compartment, configured to detect the open/close state of the storage compartment;
and the temperature sensor is configured to detect the temperature of the storage compartment.
10. The refrigerator of claim 8, wherein
The storage chamber is a deep cooling chamber.
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