CN110645754A - Food freezing device, refrigerator and food freezing control method - Google Patents

Food freezing device, refrigerator and food freezing control method Download PDF

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Publication number
CN110645754A
CN110645754A CN201910986765.XA CN201910986765A CN110645754A CN 110645754 A CN110645754 A CN 110645754A CN 201910986765 A CN201910986765 A CN 201910986765A CN 110645754 A CN110645754 A CN 110645754A
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CN
China
Prior art keywords
freezing
food
pressure
air pressure
equal
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Pending
Application number
CN201910986765.XA
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Chinese (zh)
Inventor
韩鹏
姬卫川
刘畅
陈佳弘
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201910986765.XA priority Critical patent/CN110645754A/en
Publication of CN110645754A publication Critical patent/CN110645754A/en
Pending legal-status Critical Current

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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
    • 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
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • 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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/062—Walls defining a cabinet
    • 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

Abstract

The invention relates to a food freezing device, a refrigerator and a food freezing control method, comprising the following steps: the freezing box is internally provided with a freezing chamber; the pressurization mechanism is used for pressurizing the freezing chamber to be more than or equal to a first preset air pressure; the refrigerating mechanism is used for cooling the freezing chamber to a first preset temperature or lower; the pressure reduction mechanism is used for reducing the pressure of the freezing chamber to be less than or equal to a second preset air pressure; the first preset air pressure is greater than the standard atmospheric pressure, the second preset air pressure is smaller than the first preset air pressure and greater than or equal to the standard atmospheric pressure, and the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure. The ice crystal freezing device can ensure that the surface and the interior of food are frozen simultaneously, not only ensures the freezing uniformity of the food, but also can obviously improve the freezing speed of the food, thereby ensuring that the ice crystals formed after the food is frozen have smaller volume, lower hardness and more mellow shape.

Description

Food freezing device, refrigerator and food freezing control method
Technical Field
The invention relates to the technical field of freezing, in particular to a food freezing device, a refrigerator and a food freezing control method.
Background
With the development of economy and the progress of society, people are pursuing quality of life more and more, and refrigeration equipment such as refrigerators is widely applied to daily life of people and becomes an essential tool in life of people. Refrigerators generally have a freezing compartment for freezing food to facilitate long-term preservation of the food.
According to the freezing principle, the higher the freezing speed of the liquid in the process of freezing, the smaller the volume of the formed ice crystals, the lower the hardness and the more round and moist the shape, the ice crystals with smaller volume and lower hardness can be processed without thawing, and the more round and moist the ice crystals have less damage to food in the process of thawing, thereby reducing the loss of nutritional ingredients of the food.
However, when the traditional refrigerator freezes food, due to the influence of low air outlet temperature of the freezing chamber or small heat conductivity coefficient of the food, the surface of the food is firstly frozen, and then the food is gradually frozen from the surface of the food to the interior of the food, the freezing speed is slow, so that the formed ice crystals have large volume, high hardness and sharp shape, secondary processing of the food is influenced, and food cells can be punctured in the process of thawing, so that the loss of nutritional ingredients of the food is caused.
Disclosure of Invention
Therefore, it is necessary to provide a food freezing device, a refrigerator and a food freezing control method capable of increasing the freezing speed of food in order to solve the problem of slow freezing speed of food in the conventional refrigerator.
A food freezing apparatus comprising:
the freezing box is internally provided with a freezing chamber;
the pressurization mechanism is used for pressurizing the freezing chamber to be more than or equal to a first preset air pressure;
the refrigerating mechanism is used for cooling the freezing chamber to a first preset temperature or lower;
the pressure reduction mechanism is used for reducing the pressure of the freezing chamber to be less than or equal to a second preset air pressure;
the first preset air pressure is greater than the standard atmospheric pressure, the second preset air pressure is smaller than the first preset air pressure and greater than or equal to the standard atmospheric pressure, and the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure.
In one embodiment, the pressurization mechanism is arranged outside the freezing chamber, and the pressurization mechanism is controllably communicated with or disconnected from the freezing chamber.
In one embodiment, the food freezing device further comprises an on-off mechanism connected between the pressurization mechanism and the freezing chamber for controlling the gas communication between the pressurization mechanism and the freezing chamber.
In one embodiment, the on-off mechanism includes a first communication pipe communicating between the pressurizing mechanism and the freezing compartment, and a first on-off valve fitted on the first communication pipe for controlling gas communication within the first communication pipe.
In one embodiment, the pressure reduction mechanism includes a second communication pipe and a second cut-off valve, the second communication pipe is communicated between the outside and the freezing chamber, and the second cut-off valve is mounted on the second communication pipe and is used for controlling gas communication in the second communication pipe.
In one embodiment, the food freezing apparatus further comprises a temperature sensor for detecting a temperature within the freezing chamber and a pressure sensor for detecting a pressure within the freezing chamber.
In one embodiment, the freezing box comprises a body and a door body, wherein the door body is assembled on the body in an openable and closable manner, and an accommodating cavity is defined between the door body and the body;
the freezing box further comprises a buffer pressing piece, the buffer pressing piece is arranged in the containing cavity, and the freezing chamber is formed in the buffer pressing piece.
In one embodiment, the food freezing device further comprises a controller, wherein the pressurization mechanism, the refrigeration mechanism and the pressure reduction mechanism are all electrically connected with the controller, and the controller controls the cooperative work of the pressurization mechanism, the refrigeration mechanism and the pressure reduction mechanism.
A refrigerator comprising a food freezing apparatus as claimed in any one of the preceding claims.
A food freezing control method, comprising the steps of:
controlling the supercharging mechanism to be started;
when the air pressure in the freezing chamber is greater than or equal to a first preset air pressure, controlling the pressurization mechanism to stop and the refrigeration mechanism to start;
when the indoor temperature of the freezing chamber is less than or equal to a first preset temperature, controlling a pressure reducing mechanism to be started;
when the air pressure in the freezing chamber is less than or equal to a second preset air pressure, controlling the pressure reducing mechanism to stop;
the first preset air pressure is greater than the standard atmospheric pressure, the second preset air pressure is smaller than the first preset air pressure and greater than or equal to the standard atmospheric pressure, and the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure.
In one embodiment, before the controlling pressurization mechanism is started, the method further comprises the following steps:
the on-off mechanism is controlled to be opened.
In one embodiment, after the controlling the pressure reducing mechanism to stop when the air pressure in the freezing chamber is less than or equal to a first preset air pressure, the method further comprises the following steps:
and controlling the refrigeration mechanism to be closed so as to enable the freezing compartment to enter a freezing storage mode.
The food freezing device, the refrigerator and the food freezing method can ensure that the surface and the inside of food are frozen simultaneously, ensure the freezing uniformity of the food, and obviously improve the freezing speed of the food, so that the ice crystals formed after the food is frozen have smaller volume and lower hardness, thereby meeting the requirement that the food can be processed without thawing, and simultaneously reducing the damage of the ice crystals to the food in the thawing process and reducing the loss of nutritional ingredients in the food because the freezing speed of the food is improved and the shape of the ice crystals formed after the food is frozen is more round.
Drawings
Fig. 1 is a schematic structural diagram of a food freezing apparatus according to an embodiment of the present invention;
fig. 2 is a flowchart of a food freezing control method according to an embodiment of the present invention;
fig. 3 is a flowchart of a food freezing control method according to another embodiment of the present invention.
Freezing chamber 11 pressurizing mechanism 20 pressurizing mechanism 30 depressurizing mechanism 40 second communicating pipe 41 second on-off valve 42 on-off mechanism 50 first communicating pipe 51 first on-off valve 52 temperature sensor 60 pressure sensor 70 of temperature sensor 60 of freezing chamber 11 pressurizing mechanism 20 freezing tank 10 of food freezing device 100
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a food freezing apparatus 100 for freezing food to facilitate preservation of the food. In the present embodiment, the food freezing apparatus 100 is applied to a refrigerator. It is understood that in other embodiments, the food freezing apparatus 100 can be applied to other freezing devices, and is not limited herein.
The following describes the technical solution of the present invention in detail, taking the example that the food freezing apparatus 100 is applied to a refrigerator. The present embodiment is only for exemplary illustration and does not limit the technical scope of the present invention. In addition, the drawings in the embodiments omit unnecessary components to clearly show the technical features of the invention.
The refrigerator includes a main body and a food freezing device 100, and the food freezing device 100 is mounted to the main body for freezing food to facilitate preservation of the food. Specifically, the food freezing device 100 includes a freezing chamber 10, a pressurizing mechanism 20, a refrigerating mechanism 30, and a pressure reducing mechanism 40.
The freezing box 10 is mounted on a main body of the refrigerator, and a freezing chamber 11 for storing food is opened therein. The pressurization mechanism 20 is configured to pressurize the freezing chamber 11 so that the air pressure in the freezing chamber 11 is equal to or higher than a first preset air pressure. The first preset air pressure is greater than the standard air pressure, and the freezing point of the food in the freezing chamber 11 is reduced under the first preset air pressure, so that the food can be cooled to a lower temperature without freezing.
The refrigeration mechanism 30 is configured to cool the freezing chamber 11 so that the temperature in the freezing chamber 11 is equal to or lower than a first preset temperature. Wherein the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure. The pressure reducing mechanism 40 is configured to reduce the pressure in the freezing chamber 11 to make the air pressure in the freezing chamber 11 less than or equal to a second preset air pressure, where the second preset air pressure is less than the first preset air pressure and greater than or equal to the standard atmospheric pressure.
In the refrigerator provided by the embodiment of the invention, the pressurizing mechanism 20 can pressurize the freezing chamber 11 to be more than or equal to the first preset air pressure, the freezing point of food in the refrigerator is reduced because the first preset air pressure is more than the standard air pressure, and the food can be reduced to lower temperature without freezing under the first preset air pressure. Meanwhile, the refrigeration mechanism 30 can cool the freezing compartment 11 to be less than or equal to a first preset temperature, and because the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure, the surface and the interior of the food can have a certain supercooling degree at the time of being less than or equal to the first preset temperature. Further, the pressure reducing mechanism 40 can reduce the pressure in the freezing chamber 11 to a second predetermined pressure which is lower than the first predetermined pressure and higher than the standard atmospheric pressure, so that the freezing point of the food is increased at the second predetermined pressure compared with the first predetermined pressure, and the surface and the inside of the food are frozen at the same time.
In the mode, the icing uniformity of the food is ensured by icing the surface and the inside of the food simultaneously, the icing speed of the food can be obviously improved, so that the ice crystal volume formed after the food is iced is smaller and the hardness is lower, the food can be processed under the condition that the food does not need to be unfrozen, and meanwhile, the ice crystal formed after the food is iced is more round and moist in shape due to the fact that the icing speed of the food is improved, the damage of the ice crystal to the food in the unfreezing process is reduced, and the loss of nutritional ingredients in the food is reduced.
In one embodiment, the first predetermined pressure may be 0.1MPa to 200.1MPa, preferably 0.4MPa to 100.1 MPa. The first preset temperature can be selected from-20 ℃ to 0 ℃, and is preferably-15 ℃ to-5 ℃. The second predetermined pressure may be selected from 0.1MPa to 0.2MPa, preferably from 0.10005MPa to 0.1002 MPa.
Further, the food freezing apparatus 100 further includes a temperature sensor 60 and a pressure sensor 70, the temperature sensor 60 detecting a temperature in the freezing chamber 11, and the pressure sensor 70 detecting a pressure in the freezing chamber 11, thereby calculating an air pressure in the freezing chamber 11 by a thickness.
In one embodiment, the freezing box 10 includes a body and a door body, wherein the door body is openably and closably assembled on the body, and a containing cavity is defined between the door body and the body. Specifically, the freezing box 10 further comprises a pressure relief piece, the pressure relief piece is arranged in the accommodating cavity, and the freezing chamber 11 is arranged in the pressure relief piece. The pressure buffering piece can bear impact under the action of high pressure, and the door body can be prevented from being opened under the action of high pressure relative to the condition that a freezing chamber is directly formed between the body and the door body.
In one embodiment, pressurization mechanism 20 increases the air pressure within freezing chamber 11 by venting freezing chamber 11 while ensuring that freezing chamber 11 is of constant volume. It is understood that in other embodiments, the pressurization mechanism 20 may increase the air pressure in the freezing chamber 11 by reducing the volume of the freezing chamber 11, which is not limited herein.
In one embodiment, the volume of the freezing chamber 11 is kept constant and the pressurization mechanism 20 increases the air pressure in the freezing chamber 11 by venting the freezing chamber 11. Specifically, the booster mechanism 20 is provided outside the freezing chamber 11 and is controllably connected to or disconnected from the freezing chamber 11, and when the booster mechanism 20 is connected to the freezing chamber 11, the booster mechanism 20 supplies air to the freezing chamber 11 to boost the air pressure in the freezing chamber 11, and when the booster mechanism 20 is disconnected from the freezing chamber 11, the air pressure in the freezing chamber 11 is not changed by the booster mechanism 20.
Further, the food freezing apparatus 100 further includes an on-off mechanism 50, and the on-off mechanism 50 is connected between the pressurizing mechanism 20 and the freezing chamber 11, and is configured to control gas communication between the pressurizing mechanism 20 and the freezing chamber 11. Specifically, the on-off mechanism 50 includes a first communication pipe 51 and a first on-off valve 52, the first communication pipe 51 communicates between the pressurizing mechanism 20 and the freezing chamber 11, and the first on-off valve 52 is mounted on the first communication pipe 51 for controlling gas communication in the first communication pipe 51.
The first on-off valve 52 may select a manual valve or an automatic valve. When the first on-off valve 52 is an automatic valve and it is necessary to cut off or open the gas communication in the first communication pipe 51, the manual valve is manually closed or opened. When the first on-off valve 52 is an automatic valve and it is necessary to cut off or open the gas communication in the first communication pipe 51, the automatic valve is automatically closed or opened.
In one embodiment, the refrigeration mechanism 30 includes a compressor, a condenser, a throttle member, and an evaporator connected in series to form a circuit, and the evaporator of the refrigeration mechanism 30 faces the freezing compartment 11 of the freezing box 10.
When the refrigeration device works, a compressor compresses to form a high-temperature high-pressure gas refrigerant, the high-temperature high-pressure gas refrigerant enters the condenser and releases heat in the condenser, a high-temperature high-pressure gas refrigerant is changed into a normal-temperature high-pressure liquid refrigerant, the normal-temperature high-pressure liquid refrigerant enters a throttling element (a capillary tube, a thermal expansion valve or an electronic expansion valve and the like), a low-temperature low-pressure liquid refrigerant is formed by throttling and decompressing of the throttling element, the formed low-temperature low-pressure liquid refrigerant finally enters an evaporator, the heat is absorbed in the evaporator and evaporated into the low-temperature low-pressure gas refrigerant, then the low-temperature low-pressure gas refrigerant is sucked.
The refrigerating mechanism 30 further comprises a condensation-preventing pipe connected between the compressor and the condenser, and the condensation-preventing pipe is used for preventing condensation from occurring at the sealing position of the door body and the body of the freezing box 10. That is, when the refrigerating mechanism 30 operates, the high-temperature and high-pressure gas refrigerant compressed by the compressor first enters the condensation preventing pipe to prevent the generation of condensation, and then flows from the condensation preventing pipe to the condenser for condensation.
Specifically, the refrigeration mechanism 30 further includes a filter connected between the evaporator and the throttle member, and the filter is configured to filter impurities in the normal-temperature and high-pressure liquid refrigerant flowing from the condenser to the throttle member.
In one embodiment, the depressurization mechanism 40 includes a second communication pipe 41 and a second cut-off valve 42, the second communication pipe 41 communicating between the outside and the freezing compartment 11, the second cut-off valve 42 being mounted on the second communication pipe 41 for controlling gas communication within the second communication pipe 41.
Specifically, the second cut-off valve 42 may select a manual valve or an automatic valve. When the second shut-off valve 42 is an automatic valve and it is necessary to shut off or open the gas communication in the second communication pipe 41, the manual valve is manually closed or opened. When the second shut-off valve 42 is an automatic valve and it is necessary to shut off or open the gas communication in the second communication pipe 41, the automatic valve is automatically closed or opened.
Specifically, the food freezing device 100 further includes a controller, the pressurization mechanism 20, the refrigeration mechanism 30, the pressure reducing member, the pressure reducing mechanism 40, the temperature sensor 60, and the pressure sensor 70 are all electrically connected to the controller, and the controller controls the cooperative work of the pressurization mechanism 20, the refrigeration mechanism 30, the pressure reducing member, the pressure reducing mechanism 40, the temperature sensor 60, and the pressure sensor 70.
Another embodiment of the present invention also provides a refrigerator including the above-described food freezing apparatus 100.
Referring to fig. 2, another embodiment of the present invention further provides a food freezing control method, including the steps of:
s110: controlling the pressurization mechanism 20 to be opened;
specifically, the pressurizing mechanism 20 is controlled to inflate the freezing chamber 11 to increase the air pressure in the freezing chamber 11.
S120: when the air pressure in the freezing chamber 11 is greater than or equal to a first preset air pressure, controlling the pressurization mechanism 20 to stop and the refrigeration mechanism 30 to start;
s130: when the temperature in the freezing chamber 11 is less than or equal to a first preset temperature, controlling the pressure reduction mechanism 40 to be opened;
s140: and when the air pressure in the freezing chamber 11 is less than or equal to the first preset air pressure, controlling the pressure reduction mechanism 40 to stop.
The first preset air pressure is greater than the standard atmospheric pressure, the second preset air pressure is smaller than the first preset air pressure and greater than or equal to the standard atmospheric pressure, and the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure.
In the method for controlling food freezing provided by the embodiment of the invention, the pressurizing mechanism 20 can pressurize the freezing chamber 11 to be greater than or equal to a first preset air pressure, because the first preset air pressure is greater than the standard atmospheric pressure, the freezing point of food in the refrigerator is reduced, under the first preset air pressure, the food can be reduced to be lower in temperature without freezing, the refrigerating mechanism 30 can reduce the temperature of the freezing chamber 11 to be less than or equal to the first preset temperature, because the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure, the surface and the interior of the food can have a certain supercooling degree when the first preset temperature is less than or equal to the first preset temperature, the pressure reducing mechanism 40 can reduce the pressure of the freezing chamber 11 to be less than or equal to a second preset air pressure, because the second preset air pressure is less than the first preset air pressure and is greater than or equal to the standard atmospheric pressure, under the second preset air pressure compared with the first preset air pressure, the freezing point of the food is raised, and the surface and the inside of the food are frozen at the same time.
In the mode, the icing uniformity of the food is ensured by icing the surface and the inside of the food simultaneously, the icing speed of the food can be obviously improved, so that the ice crystal volume formed after the food is iced is smaller and the hardness is lower, the food can be processed under the condition that the food does not need to be unfrozen, and meanwhile, the ice crystal formed after the food is iced is more round and moist in shape due to the fact that the icing speed of the food is improved, the damage of the ice crystal to the food in the unfreezing process is reduced, and the loss of nutritional ingredients in the food is reduced.
In one embodiment, before step S110, the method further comprises the steps of:
the on-off mechanism 50 is controlled to open.
That is, after the on-off mechanism 50 is turned on, the gas communication between the pressurizing mechanism 20 and the freezing chamber 11 is opened, and the pressurizing mechanism 20 can inflate the freezing chamber 11 to pressurize.
Referring to fig. 3, further, before the step of controlling the on/off mechanism 50 to be opened, the method further includes the steps of:
detecting the air pressure P in the freezing chamber 11;
specifically, the pressure inside the freezing chamber 11 is detected by the pressure sensor 70, and then the air pressure P inside the freezing chamber 11 is obtained by calculation.
When the air pressure P in the freezing chamber 11 is smaller than a first preset air pressure, the on-off mechanism 50 is controlled to be opened, and then the pressurization mechanism 20 is controlled to be opened.
In another embodiment, step S120 includes the steps of:
calculating the operation time t1 of the pressurization mechanism 20;
when the operation time t1 of the pressurization mechanism 20 reaches (is greater than or equal to) the first preset time, the pressurization mechanism 20 is controlled to stop.
Through the arrangement, the booster mechanism 20 is prevented from working under the limit condition, and the working stability of the food freezing device 100 is ensured.
Specifically, the first preset time is selected from 0h to 5h, and preferably from 1h to 2 h. It is understood that, in other embodiments, the first preset time may not be 0h to 5h, and the first preset time may be adaptively adjusted according to the requirement of the operating condition.
In yet another embodiment, step S130 further comprises the steps of:
calculating the running time t2 of the refrigeration mechanism 30;
when the running time t2 of the refrigeration mechanism 30 reaches (is greater than or equal to) the second preset time, the pressure reduction mechanism 40 is controlled to be started.
Through the arrangement, when the refrigerating mechanism 30 reaches the second preset time, the pressure reducing mechanism 40 is started, the pressure reducing mechanism 40 can realize pressure reduction in a short time, the refrigerating mechanism 30 is prevented from running for too long, and the damage probability of the refrigerating mechanism 30 is reduced.
Specifically, the second preset time is selected from 0h to 20h, and preferably from 12h to 15 h. It is understood that, in other embodiments, the second preset time may not be 0h to 20h, and the second preset time may be adaptively adjusted according to the requirement of the operating condition.
In one embodiment, after step S140, the method further comprises the steps of:
the refrigeration mechanism 30 is controlled to stop to bring the freezing compartment 11 into the freezing mode.
Specifically, after entering the freezing mode in the freezing compartment 11, the method further includes the steps of:
detecting the temperature T inside the freezing compartment 11;
when the temperature in the freezing chamber 11 is greater than or equal to a second preset temperature, controlling the refrigeration mechanism 30 to be started;
wherein the second preset temperature is greater than the first preset temperature.
That is, when the temperature in the freezing compartment 11 is equal to or higher than the second preset temperature in the freezing compartment 11 in the freezing mode, it is verified that the temperature in the freezing compartment 11 does not satisfy the food freezing requirement (the temperature in the freezing compartment 11 is high, and the food in the freezing compartment 11 is easily melted at this temperature), and at this time, the refrigeration mechanism 30 needs to be controlled to be turned on to perform refrigeration.
Specifically, the second preset temperature is selected to be 10 ℃ to 0 ℃, and is preferably-4 ℃ to-6 ℃.
In another embodiment, the method further includes, after the step of controlling the refrigeration mechanism 30 to be turned on when the temperature in the freezing compartment 11 is greater than or equal to a second preset temperature:
when the temperature in the freezing chamber 11 is less than or equal to a third preset temperature, controlling the refrigeration mechanism 30 to stop;
the third preset temperature is lower than the second preset temperature and higher than the first preset temperature.
That is, when the temperature in the freezing compartment 11 is lower than the third preset temperature in the freezing compartment 11 in the freezing mode, the refrigeration mechanism 30 is controlled to stop so that the internal temperature of the freezing compartment 11 is always between the second preset temperature and the third preset temperature in the freezing mode.
Specifically, the third preset temperature is selected from-5 ℃ to-2 ℃, preferably from-2 ℃ to-1 ℃.
The freezing control device 100, the refrigerator and the freezing control method provided by the embodiment of the invention have the following beneficial effects:
the pressure in the freezing chamber 11 can be increased to be more than or equal to a first preset air pressure through the supercharging mechanism 20, at the moment, the freezing point of food in the freezing chamber 11 is reduced under the action of high pressure, the food is reduced to be at lower temperature without freezing, the temperature in the freezing chamber 11 can be reduced to be less than or equal to the first preset temperature through the refrigerating mechanism 30, so that the surface and the interior of the food in the freezing chamber 11 can reach enough supercooling degree, the pressure in the freezing chamber 11 is reduced to be less than or equal to a second preset air pressure through the decompression mechanism 40, at the moment, the freezing point of the food is recovered, the interior and the exterior of the food are simultaneously frozen, compared with the prior art (the surface of the food is firstly frozen and the interior of the food is slowly frozen), the food is frozen fast, the growth time of ice crystals of the food is reduced, the ice crystal volume formed after the food is frozen is smaller and the hardness is lower, so that the food can be processed without being, meanwhile, as the freezing speed of the food is increased, the ice crystals formed after the food is frozen are more round in shape, thereby reducing the damage of the ice crystals to the food in the unfreezing process and reducing the loss of nutritional ingredients in the food.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. A food freezing apparatus (100), comprising:
the freezing box (10), wherein a freezing chamber (11) is arranged in the freezing box (10);
a pressurization mechanism (20) for pressurizing the freezing chamber (11) to a first preset air pressure or higher;
the refrigerating mechanism (30) is used for cooling the freezing chamber (11) to be less than or equal to a first preset temperature;
the pressure reduction mechanism (40) is used for reducing the pressure of the freezing chamber (11) to be less than or equal to a second preset air pressure;
the first preset air pressure is greater than the standard atmospheric pressure, the second preset air pressure is smaller than the first preset air pressure and greater than or equal to the standard atmospheric pressure, and the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure.
2. The food freezing apparatus (100) according to claim 1, wherein the pressurization mechanism (20) is provided outside the freezing chamber (11), and the pressurization mechanism (20) is controllably connected to or disconnected from the freezing chamber (11).
3. The food freezing apparatus (100) according to claim 2, wherein the food freezing apparatus (100) further comprises an on-off mechanism (50), the on-off mechanism (50) being connected between the pressurization mechanism (20) and the freezing chamber (11) for controlling the gas communication between the pressurization mechanism (20) and the freezing chamber (11).
4. Food freezing apparatus (100) according to claim 3, wherein the on-off mechanism (50) comprises a first communication pipe (51) and a first on-off valve (52), the first communication pipe (51) communicating between the pressurization mechanism (20) and the freezing compartment (11), the first on-off valve (52) being fitted on the first communication pipe (51) for controlling the gas communication within the first communication pipe (51).
5. The food freezing apparatus (100) according to claim 1, wherein the pressure reducing mechanism (40) includes a second communication pipe (41) and a second cut-off valve (42), the second communication pipe (41) is communicated between the outside and the freezing compartment (11), and the second cut-off valve (42) is mounted on the second communication pipe (41) for controlling the gas communication in the second communication pipe (41).
6. The food freezing apparatus (100) of claim 1, wherein the food freezing apparatus (100) further comprises a temperature sensor (60) and a pressure sensor (70), the temperature sensor (60) being configured to detect a temperature within the freezing chamber (11), the pressure sensor (70) being configured to detect a pressure within the freezing chamber (11).
7. The food freezing device (100) according to claim 1, wherein the freezing box comprises a body and a door body, the door body is assembled on the body in an openable and closable manner, and a containing cavity is defined between the door body and the body;
the freezing box (10) further comprises a buffer piece, the buffer piece is arranged in the containing cavity, and the freezing chamber (11) is formed in the buffer piece.
8. The food freezing apparatus (100) according to any one of claims 1 to 7, wherein the food freezing apparatus (100) further comprises a controller, the pressurization mechanism (20), the refrigeration mechanism (30), and the depressurization mechanism (40) are all electrically connected to the controller, and the controller controls the cooperative operation of the pressurization mechanism (20), the refrigeration mechanism (30), and the depressurization mechanism (40).
9. A refrigerator, characterized in that it comprises a food freezing apparatus (100) according to any one of claims 1 to 8.
10. A method of food freezing control, comprising the steps of:
controlling the supercharging mechanism (20) to be opened;
when the air pressure in the freezing chamber (11) is greater than or equal to a first preset air pressure, controlling the pressurization mechanism (20) to stop and the refrigeration mechanism (30) to start;
when the temperature in the freezing chamber (11) is less than or equal to a first preset temperature, controlling the pressure reduction mechanism (40) to be opened;
when the air pressure in the freezing chamber (11) is less than or equal to a second preset air pressure, controlling the pressure reduction mechanism (40) to stop;
the first preset air pressure is greater than the standard atmospheric pressure, the second preset air pressure is smaller than the first preset air pressure and greater than or equal to the standard atmospheric pressure, and the first preset temperature is less than or equal to the freezing point of water under the standard atmospheric pressure.
11. The food freezing control method according to claim 10, further comprising, before the controlling pressurization mechanism (20) is turned on, the steps of:
the on-off mechanism (50) is controlled to be opened.
12. The food freezing control method according to claim 10, wherein after said controlling the pressure reducing mechanism (40) to stop when the air pressure in the freezing compartment (11) is less than or equal to a first preset air pressure, further comprising the steps of:
controlling the refrigeration mechanism (30) to be closed so as to enable the freezing compartment (11) to enter a freezing mode.
CN201910986765.XA 2019-10-17 2019-10-17 Food freezing device, refrigerator and food freezing control method Pending CN110645754A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101156036A (en) * 2005-03-31 2008-04-02 大和田哲男 Quick freezing device and method
JP2009058212A (en) * 2007-08-30 2009-03-19 Shinyo Industries Co Ltd Refrigerator-freezer
JP2010085050A (en) * 2008-10-01 2010-04-15 Mitsubishi Electric Corp Frozen storage device, refrigerator, and frozen storage method
US20100272840A1 (en) * 2007-05-07 2010-10-28 Victorino Juan Mata Facility for the forming of frozen granules from food liquids
JP2012139152A (en) * 2010-12-28 2012-07-26 Naoyuki Yamaguchi Refrigerating/freezing apparatus
CN210740834U (en) * 2019-10-17 2020-06-12 珠海格力电器股份有限公司 Food freezing device and refrigerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101156036A (en) * 2005-03-31 2008-04-02 大和田哲男 Quick freezing device and method
US20100272840A1 (en) * 2007-05-07 2010-10-28 Victorino Juan Mata Facility for the forming of frozen granules from food liquids
JP2009058212A (en) * 2007-08-30 2009-03-19 Shinyo Industries Co Ltd Refrigerator-freezer
JP2010085050A (en) * 2008-10-01 2010-04-15 Mitsubishi Electric Corp Frozen storage device, refrigerator, and frozen storage method
JP2012139152A (en) * 2010-12-28 2012-07-26 Naoyuki Yamaguchi Refrigerating/freezing apparatus
CN210740834U (en) * 2019-10-17 2020-06-12 珠海格力电器股份有限公司 Food freezing device and refrigerator

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