CN110906616B

CN110906616B - Instantaneous freezing control method of refrigeration equipment and refrigeration equipment

Info

Publication number: CN110906616B
Application number: CN201911045194.6A
Authority: CN
Inventors: 钱梅双; 辛海亚; 梁起
Original assignee: Gree Electric Appliances Inc of Zhuhai; Hefei Kinghome Electrical Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Hefei Kinghome Electrical Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2023-06-09
Anticipated expiration: 2039-10-30
Also published as: CN110906616A

Abstract

The invention relates to a refrigerating equipment instant freezing control method and refrigerating equipment. The instantaneous freezing control method of the refrigeration equipment comprises a staged cooling supercooling process, a supercooling releasing process and a conventional refrigeration preservation process. The supercooling and cooling process is characterized in that the object to be cooled is cooled in stages, cooling in each stage is realized by implementing cooling control on the instant freezing chamber, and each cooling stage in the supercooling and cooling process is provided with a preset accumulated working time length of a compressor in the corresponding stage; the compressor is controlled to periodically operate from stage to stage according to a preset accumulated operating time period. The supercooling release process is to start the oscillation device, reduce the flow of the capillary group, increase the rotation speed of the condenser fan and increase the rotation speed of the condenser fan to perform supercooling release operation, so that the stored matters stored in the instant freezing chamber are supercooled and released, and then the stored matters are frozen instantly (instant freezing for short), and the frozen stored matters are stored for a long time at the conventional refrigeration storage temperature.

Description

Instantaneous freezing control method of refrigeration equipment and refrigeration equipment

Technical Field

The invention relates to a refrigerating equipment instant freezing control method and refrigerating equipment, in particular to a control method capable of realizing food instant freezing and a refrigerator.

Background

In order to better maintain nutrition of frozen foods, common freezing, quick freezing and other freezing modes are generally adopted for food preservation, and the traditional common freezing has the defects of uneven temperature control in a freezing chamber, long-time stay in a maximum ice crystal generation zone and the like; while quick freezing can quickly pass through the largest ice crystal generation zone, the production cost is higher, and the method is not beneficial to popularization and application on a refrigerator. The supercooling freezing technology can enable the object to be preserved to form even and fine ice crystals after supercooling, so that the flavor of food can be maintained better than that of the common freezing method, and the method is more beneficial to cutting.

The existing supercooling preservation technology has the following defects:

(1) The non-uniform temperature drop in the supercooling process causes the premature release of supercooling.

(2) The supercooling release effect is poor, and the wind speed or the wind quantity is increased.

(3) The depth of supercooling is shallow, and the supercooled state cannot be well entered.

At present, the supercooling control process is a difficult point, and how to perfect the control of the supercooling process and the better combination with the supercooling release process is needed to be further developed and perfected, so that the supercooling freezing preservation with higher quality is obtained.

Disclosure of Invention

In view of the above, the present invention provides a refrigeration apparatus and a refrigeration apparatus instant freeze control method thereof that overcomes or at least partially solves the above-described problems.

The invention relates to a refrigerating equipment instant freezing control method and refrigerating equipment. The instantaneous freezing control method of the refrigeration equipment comprises a staged cooling supercooling process, a supercooling releasing process and a conventional refrigeration preservation process.

The supercooling and cooling process is characterized in that the object to be cooled is cooled in stages, cooling in each stage is realized by implementing cooling control on the instant freezing chamber, and each cooling stage in the supercooling and cooling process is provided with a preset accumulated working time length of a compressor in the corresponding stage; the compressor is controlled to periodically operate from stage to stage according to a preset accumulated operating time period. The supercooling release process is to start the oscillation device, reduce the flow of the capillary group, increase the rotation speed of the condenser fan and increase the rotation speed of the condenser fan to perform supercooling release operation, so that the stored matters stored in the instant freezing chamber are supercooled and released, and then the stored matters are frozen instantly (instant freezing for short), and the frozen stored matters are stored for a long time at the conventional refrigeration storage temperature.

Specifically:

the invention provides a refrigeration device, which comprises a transient freezing chamber with a transient freezing function, a refrigeration system for providing transient freezing capacity for the transient freezing chamber, and a control unit for controlling the refrigeration system to implement transient freezing storage for the transient freezing chamber, wherein the control unit comprises a controller and a timer, and is characterized in that: the control unit performs a staged cooling and supercooling process and a supercooling releasing process on the instant freezing chamber by controlling the refrigerating system, wherein:

the staged cooling and supercooling process comprises m cooling stages, wherein m is more than or equal to 2, and m is a natural number;

each cooling stage of the m stages is provided with a preset accumulated working time length of the compressor corresponding to the stage;

the compressor is controlled to periodically operate stage by stage according to a preset accumulated operating time; in each period, the compressor is controlled to be intermittently started and stopped according to a preset operation period;

when the compressor finishes the preset accumulated working time length in the nth stage as follows

Then, automatically entering an n+1th descending section to cool the next stage, and completing the preset accumulated working time length of the n+1th stage>

m is more than or equal to n is more than or equal to 1, n is a natural number; the compressor preset accumulated operating time of the nth stage +. >

t _n i represents the working time of the compressor in the ith working period of the nth stage; i is more than or equal to 1 and is a natural number;

when the compressor finishes the last m-th stage, the preset accumulated working time length

When the instant freezing chamber enters a supercooling release process;

supercooling release process: the refrigerating equipment is also provided with an oscillating device, a capillary group and a condenser fan; starting an oscillating device in the supercooling release process, and keeping the oscillating device in a starting state to run for t' time; the flow of the capillary tube group is reduced to V2 flow from V1 flow in the process of cooling and supercooling in stages, V2 is smaller than V1, the rotation speed of the condenser fan is increased to S2 from S1 in the process of cooling and supercooling in stages, S1 is smaller than S2, the rotation speed of the compressor is increased to M2 from M1 in the process of cooling and supercooling in stages, M1 is smaller than M2, the capillary tube group keeps V2 flow, the rotation speed of the condenser fan keeps S2, and the rotation speed of the compressor keeps M2 to jointly run for t time.

The invention provides a method for controlling instantaneous freezing of refrigeration equipment, which is provided with an instantaneous freezing chamber and a refrigeration system which can supply cold for the instantaneous freezing chamber and is provided with a compressor, and is characterized in that:

controlling the refrigerating system to implement the following staged cooling and supercooling process and supercooling release process on the instant freezing chamber:

The staged cooling and supercooling process comprises m cooling stages, wherein m is more than or equal to 2, and m is a natural number; each cooling stage of the m stages is provided with a preset accumulated working time length of the compressor corresponding to the stage; controlling the compressor to work stage by stage according to the preset accumulated working time length of each stage; in each cooling stage, controlling the intermittent operation of the compressor and calculating the working time length of the compressor; the preset accumulated working time length of the compressor in the nth stage is recorded as

Wherein t is _n i represents the working time of the ith startup of the compressor in the nth stage; i is more than or equal to 1 and is a natural number;

when the compressor finishes the preset accumulated working time in the nth stage

Then, automatically entering an n+1 stage, cooling in the next stage, and completing the preset accumulated working time length of the n+1 stage>

m is more than or equal to n is more than or equal to 1, n is a natural number;

cooling until finishing the last mth stage and corresponding preset accumulated working time of the mth stage

The invention provides a method for controlling instantaneous freezing of refrigeration equipment, which is provided with an instantaneous freezing chamber and a refrigeration system which is used for cooling the instantaneous freezing chamber and provided with a compressor, and is characterized in that: controlling the refrigerating system to implement a transient freezing storage process provided with a staged cooling and supercooling process and a supercooling release process on the transient freezing chamber, wherein:

each cooling stage of the m stages is provided with a preset stage cooling duration;

in the cooling time period of each preset stage, the compressor is controlled to start and stop for preset single start time period, preset operation period and preset accumulated working time period;

when the compressor works in the nth stage, the preset operation period is t _n i ", presetting the accumulated working time length as

n represents any natural number from 1 to m, n is more than or equal to 1 and less than or equal to m; t is t _n i represents the preset single start time length of the ith working period of the compressor in the nth stage,/for the compressor>

i is more than or equal to 1 and is a natural number;

thus, the compressor is controlled to periodically work stage by stage according to the preset stage cooling time length, the preset running period, the preset single starting time length and the preset accumulated working time length until the preset accumulated working time length of the last mth stage is finished

Then entering a supercooling release process;

Preferably, when the compressor completes the last mth stage cooling and corresponding preset accumulated working time length

Then, entering a supercooling release process; and after the supercooling release process reaches the preset supercooling release time, the conventional refrigeration preservation process is started.

The invention provides a method for controlling instantaneous freezing of refrigeration equipment, which is provided with an instantaneous freezing chamber and a refrigeration system which is used for cooling the instantaneous freezing chamber and provided with a compressor, and is characterized in that: in the implementation of the instant freezing chamber, the following instant freezing process is controlled:

S0: starting a transient freeze preservation mode;

s1: carrying out a staged cooling and supercooling process on the stored matters in the instant freezing chamber;

s2: performing supercooling release process on the stored material in the instant freezing chamber;

s3: performing a conventional refrigeration preservation process on the storage in the instant freezing chamber;

the S1 process is carried out in m cooling stages stage by stage, and the working time of the compressor is timed in each stage;

Wherein m is more than or equal to n is more than or equal to 1; m and n are natural numbers; t is t _n i represents the working time of the compressor in the ith working period of the nth stage; i is more than or equal to 1, i is a natural number; the compressor preset accumulated operating time of the nth stage +.>

Then, the process goes to a supercooling release process S2;

wherein the S3 supercooling release process: supercooling release process: the refrigerating equipment is also provided with an oscillating device, a capillary group and a condenser fan; starting an oscillating device in the supercooling release process, and keeping the oscillating device in a starting state to run for t' time; the flow of the capillary tube group is reduced from the V1 flow in the stage cooling and supercooling process to the V2 flow in the stage cooling and supercooling process, V2 is smaller than V1, the rotating speed of the condenser fan is increased from S1 in the stage cooling and supercooling process to S2, S1 is smaller than S2, the rotating speed of the compressor is increased from M1 in the stage cooling and supercooling process to M2, M1 is smaller than M2, the capillary tube group keeps the V2 flow, the rotating speed of the condenser fan keeps S2, and the rotating speed of the compressor keeps M2 to jointly operate for t time;

The supercooling release process S2 is timed, and after a preset supercooling release process period is reached, the routine refrigerating and preserving process S3 is entered.

Preferably, the duty cycle ≡1 of the compressor in the 1 st cooling stage of the staged cooling process is controlled to be maximum, and the working time of the compressor is accumulated

The longest; the 1 st cooling stage cools the storage matters in the instant freezing chamber to 5 ℃ to-1 ℃.

Preferably, the staged cooling process comprises at least 3 stages, and from stage 2, the duty cycle ≡n+1 of the n+1 stage of the compressor is greater than the duty cycle ≡n of the n stage of the compressor, namely ≡n+1>2, ≡3; preset single start time length t of preset running period of n+1 stage compressor _n+1 i is greater than a preset single startup time length t of a preset running period of an nth stage _n i, namely: t is t _n+1 i>t _n i; the staged cooling and supercooling process enables the storage matters in the instant freezing chamber to be cooled to minus 2 ℃ to minus 6 ℃.

Preferably, after the supercooling release process operation is completed, a conventional refrigerating and preserving process is performed; the conventional refrigeration preservation process is characterized in that the temperature of the storage matters in the instant freezing chamber is maintained at a preset temperature Tc, and Tc is more than or equal to-7 ℃ and less than 0 ℃;

the control method for the conventional refrigeration preservation process to run according to the preset temperature Tc comprises the following steps: when the temperature of the instant freezing chamber reaches the starting temperature point T _ON c, opening a throttle of the instant freezing chamber; when the temperature of the instant freezing chamber reaches the first stop temperature point T _OFF c, closing a throttle of the instant freezing chamber; t (T) _ON c＝Tc+T _B1 /2,T _OFF c＝T _ON c–T _B2 /2，T _ON c>Tc>T _OFF c；T _B1 Refers to the floating temperature of the starting point of the instant freezing chamber in the starting process of the compressor; t (T) _B2 Refers to the temperature difference of the instant freezing chamber.

Preferably, the normal refrigeration and preservation process is entered, the oscillating device is in a closed state, the flow of the capillary group is V1, the rotating speed of the condenser fan is S1, and the rotating speed of the compressor is M1.

Preferably, the refrigeration equipment is further provided with a refrigerating fan and a flash chamber air door; the working parameters of the condenser fan, the capillary group, the refrigerating fan and the instantaneous freezing chamber air door are controlled to be unchanged in the staged cooling and supercooling process, and the oscillating device is in a closed state in the staged cooling and supercooling process.

Preferably, the working parameters of the condenser fan, the capillary group, the refrigerating fan and the compressor in the refrigerating system are controlled to be unchanged in the conventional refrigerating preservation process, and the oscillating device is in a closed state in the conventional refrigerating preservation process.

Preferably, the operation of controlling the flow rate of the capillary tube group to be reduced from V1 to V2, the operation of increasing the condenser fan rotation speed from S1 to S2, and the operation of increasing the compressor rotation speed from M1 to M2 are performed simultaneously during the supercooling release; controlling the starting operation of the oscillating device and the operation of reducing the flow rate of the capillary group from V1 to V2, the operation of increasing the rotating speed of the condenser fan from S1 to S2 and the operation of increasing the rotating speed of the compressor from M1 to M2 in the supercooling releasing process to be simultaneously executed; or controlling the opening operation of the oscillating device and the operation of reducing the flow rate of the capillary group from V1 to V2, the operation of increasing the rotation speed of the condenser fan from S1 to S2 and the operation of increasing the rotation speed of the compressor from M1 to M2 in the supercooling release process to be performed according to a preset sequence.

The invention also provides a refrigeration device which is provided with the instant freezing chamber with the instant freezing function, and the refrigeration device can be used for realizing the instant freezing control method of any refrigeration device.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely examples of the present disclosure and other drawings may be made from these drawings by one of ordinary skill in the art without inventive effort.

FIG. 1 (a) is a schematic illustration of a normal freezing curve of water according to an embodiment of the present invention;

FIG. 1 (b) is a schematic view of freezing curves of water with supercooled freezing process according to an embodiment of the present invention;

FIG. 1 (c) is a schematic diagram showing the ice crystal growth process of water in supercooled freezing process according to an embodiment of the present invention;

fig. 2 is a schematic view of a refrigerator according to an embodiment of the present invention;

FIG. 3 is a refrigeration system diagram of an embodiment of the present invention;

FIG. 4 is a refrigerant flow diagram of an embodiment of the present invention;

fig. 5 is a schematic view of a control unit of a refrigerator according to an embodiment of the present invention;

FIG. 6 is a logic control diagram in an embodiment of the present invention;

FIG. 7 is a schematic view of the structure of a flash chamber in an embodiment of the invention;

In the figure:

a refrigerator-100; a refrigerating chamber-11; a flash chamber-12; a freezing chamber-13; a flash storage area box body-120; an oscillation conduction mechanism-121;

a refrigeration system-200; a freeze evaporator-21; an air return tube assembly-220; return air heat exchange section-221; a compressor-23; a condenser-24; anti-coagulation tube-25; a dry filter-26; capillary group-270; capillaries 1-271; capillary 2-272; an electric switching valve-28;

a control unit-30; a controller-31; a display-32; a temperature sensor-33; a temperature regulating device-34; an infrared sensor-35; a frequency conversion plate-36; a timer-37; a condenser fan-38; an oscillating device-39;

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

[ description of the invention ] the present invention relates to the technical background of instant freeze storage

The invention relates to a storage object which comprises the following storage objects: such as meat stock, seafood, and fruit and vegetable fresh stock, cake/cold food, bread stock, and edible food such as beverage, wine, and additive; in addition, cadavers that require instant freezing are also contemplated.

Generally, a refrigerating apparatus stores a storage including a storage such as fish or meat, and the like, and the inside temperature of a closed flash chamber is reduced to be lower than the outside temperature, so that the storage is stored for a long period of time by a low-temperature freezing method.

Whether the quality of the stored material is good or not is greatly affected by the shape, size and distribution of ice crystals generated during freezing. For example, in slow freezing of meat, ice crystals are firstly generated outside muscle cells with low solution concentration, the number of crystal nucleus is small, the ice crystals grow large, cell membranes are damaged, cells are broken, meanwhile, moisture of muscle cells permeates the cell membranes to form the ice crystals, the muscle cells are dehydrated and atrophic, and the cells cannot be completely restored to be fresh when thawing, so that the fresh flavor is lost. Therefore, after thawing the stock, especially after thawing the stock such as meat or fish, the flavor is lost and the taste is deteriorated.

In order to solve such a problem, the present application proposes a technique of supercooling a storage by controlling the temperature of a flash chamber by using a supercooled state.

The supercooled state means that the stored material does not undergo a phase change although it has reached a level below the freezing point of the stored material. Supercooled freezing (or instant freezing) refers to a freezing preservation mode (different from conventional freezing preservation) in which supercooled state is achieved.

After the storage article is in the supercooled state, the instant freezing (or supercooled freezing) is different from the quick freezing to the greatest extent; ensuring that the storage article enters a supercooled state and maintaining the supercooled non-frozen state for a sufficient time to ensure adequate supercooling; at the same time, it is also necessary to ensure that the temperature of the store is low in the supercooled state, i.e. to ensure that the store is supercooled sufficiently.

The supercooling degree is the difference between the freezing point of the stored material and the supercooling minimum temperature. The degree of supercooling depends on the freezing point of the store and the supercooling minimum temperature.

The supercooling minimum temperature means the minimum temperature at which the stored material maintains the supercooled state.

By freezing point is meant the point at which the moisture in the store changes from a liquid state to a solid state, i.e. the temperature at which ice crystals of the store begin to appear. For example, the freezing point of purified water is 0 ℃, and the supercooled state is that water has been cooled below its freezing point, i.e. 0 ℃, and still remains in a liquid state from freezing. However, most foods contain inorganic salts, sugar or other organic acids, etc. which affect freezing, and the liquid in the stock is not pure water, but a solution containing a solute, and the vapor pressure of the solution is reduced due to the action of the solute in the solution, so that the freezing temperature of the stock is lower than the freezing point 0 ℃ of water (raoult's law).

Different storage types have certain difference of freezing points, but most of the freezing points are between-1 ℃ and-5 ℃, and the following common storage freezing points are listed:

beef: -1.6 ℃ to 2.2 ℃;

pork: -2.0 ℃; fish: -2.2 ℃;

egg: -2.8 ℃; milk: -0.6 ℃;

grape: -3.5 ℃; apple: -2.0 ℃;

when the storage device is in control, if the instant freezing chamber only stores a certain type of storage objects, the freezing point of the storage objects is only considered, if the instant freezing chamber does not make a fine distinction, the storage device can be used for storing a plurality of types of storage objects, the normal range of the freezing point of different types of storage objects is considered, and a certain control allowance is reserved. Most of the frozen stock stored in the refrigerator is meat, however, the freezing point of meat is usually about-2 ℃, and accordingly, the freezing point temperature of meat can be set to about-2 ℃.

Currently, industry has consensus that supercooling refrigeration technology (or "instant freezing technology") greatly improves the quality of refrigeration due to supercooling state during the freezing process.

Further analysis of the phase change of the stored substance during supercooling and freezing Using pure Water as an example

Taking water as an example, fig. 1 (a) shows a normal freezing and freezing curve, namely, a freezing and freezing curve without supercooling, fig. 1 (b) and fig. 1 (c) show five states which are undergone by a freezing curve with supercooling and freezing process and supercooling and freezing storage process (namely, instant freezing and storing process), and the five states are: (1) unfrozen state: the storage temperature is the state above the freezing point of the storage.

(2) Supercooling state: the temperature of the store is below the freezing point of the store and is not frozen.

(3) Instantaneous temperature rise state after supercooling release: the temperature of the storage material is raised from the temperature below the freezing point to the temperature-raising state of the freezing point.

(4) Freezing start-freezing completion state: the process of the storage (i.e. water) being maintained at the freezing point temperature from a liquid state to a solid state is maintained by the phase change of the storage (i.e. water, if water, from liquid water to solid ice) reaching the freezing point.

(5) Freezing completion and cryopreservation state: the stored material is frozen after the process of (4), and the stored material is continuously reduced from the freezing point temperature under the condition of external continuous cooling, and finally is frozen and stored for a long time at a temperature lower than the freezing point.

According to the analysis of fig. 1 (a), 1 (b) and 1 (c) in combination with the common freezing and supercooling freezing principles, it is known that the common freezing in fig. 1 (a) slowly starts to freeze from the surface of the object over time, and finally the formed ice crystals have larger and sharp volumes, such as needles, so that not only the microbial cells are damaged, but also the cells of the fresh storage such as fresh meat, fruits and vegetables are damaged, and the quality of the fresh storage is reduced. Whereas the water in fig. 1 (b) and 1 (c) has supercooled freezing process, the water starts to freeze after the supercooled state is released after the supercooled state, and the ice crystal growth and change process during the freezing process of the water after the supercooled state can be seen from fig. 1 (c). From the illustration of fig. 1 (c), we can conclude that: the process of supercooling can inhibit the generation of needle-shaped ice crystals in the aqueous storage during storage, the formed ice crystals are more in elliptical particle packing, the volume is smaller and the size is more uniform, and the process is different from the needle-shaped ice crystals generated by common freezing, so that the damaged cells of the needle-shaped ice crystals during common freezing can be prevented, the outflow of cell juice is reduced, the flavor substances of the storage are preserved, and the preservation effect of the storage is improved.

Specific examples of the instant freezing process are as follows:

s1: the stage cooling and supercooling process refers to a supercooling and supercooling process in which the stored substance is cooled from a temperature higher than the freezing point to a temperature lower than the freezing point and is not frozen. The greatest advantage of using supercooled refrigeration to freeze the stock is that good quality refrigeration can be obtained. During entry into and in the supercooled state,

the interior of the reservoir is also sufficiently cooled so that uniform ice nuclei form throughout the reservoir and grow into small granular ice crystals. In addition, the larger the difference between the lowest temperature reached in the supercooled state and the freezing point, the larger the number of ice nuclei formed at the start of freezing.

For better freezing quality of finer ice crystals, the present invention preferably adopts a stage-wise supercooling process (fig. 1 (c) is a process of a0→a1→a2).

The first stage (A0-A1) of the initial cooling is a pre-cooling stage, and the refrigerating system is controlled to provide larger cold quantity of the instant freezing chamber compared with other cooling stages so as to meet the requirement of rapid cooling of the stored matters. Because the initial temperature of the refrigerated storage is higher in the freezing process, larger cold quantity is needed, and when the temperature is reduced and cooled initially, the surface temperature is rapidly reduced, if the cold quantity supply cannot adapt to the cooling speed of the storage, the central temperature of the refrigerated storage is limited by slow heat transfer and is slowly reduced, the whole temperature of the refrigerated storage is uneven, the refrigerated storage is difficult to enter a supercooled state, and the phenomenon of splitting skin is also generated. Therefore, it is preferable that the first stage cooling lowers the temperature of the whole of the refrigerated storage by a temperature T1 slightly higher than the freezing point with a relatively large amount of cooling so as to be supercooled. Since the frozen stock stored in the refrigerator is mainly meat, and the freezing point of meat is generally about-2 ℃, correspondingly, T1 can be set to about 10 ℃ to-1 ℃.

Preferably, the lower the supercooling minimum threshold value is, the lower the cooling speed is controlled so as to avoid unexpected release of supercooling caused by air flow disturbance and temperature disturbance. In order to ensure more sufficient supercooling time and smoothly cool to the lowest temperature threshold of supercooling (also called the lowest supercooling temperature or the lowest supercooling temperature), the sectional cooling supercooling process at least comprises 2 stages, preferably more than 3 stages, such as 6 stages, so that the supercooling process is cooled to the lowest cooling threshold as smoothly as possible, but the initial temperature of the food is higher in the first stage as the initial stage, more cold energy is required for supplying, and the preferred cooling speed is the greatest to reduce the temperature difference between the inside and outside of the food as much as possible, so that the skin cracking phenomenon is generated.

Further preferably, the temperature of the surface of the storage object is reduced from 3 ℃ to a temperature reduction speed within the range of 0 ℃; the temperature difference of air around the storage is below 2 ℃, and the temperature difference between the surface and the center of the food is below 2 ℃, so that the food is more favorable for entering a supercooling state and maintaining supercooling with enough supercooling degree.

S2: the supercooling release process is a freezing process of the stored material from supercooling release to full freezing of the stored material due to supercooling stimulation, as shown in fig. 1 (C), namely, an a→b→c process, wherein the a→b process is a temperature raising process of instantly raising the temperature of the stored material to a freezing point after supercooling release operation is performed, the B state point is a starting point of the stored material to start freezing, and the C state point is an ending point of the stored material to be fully frozen; the process B-C is a phase change process from completely unfrozen to completely frozen after supercooling release operation, solid-liquid coexistence state is adopted between B-C, and round ice crystal particles are uniformly distributed in food cells (stored matters) without puncturing cell walls, so that the food is preserved without deterioration, and meanwhile, nutrition loss is avoided. In the actual operation process, the shorter and better the process time is, so as to quickly break through the maximum ice crystal band.

The supercooled state is an unstable state, and some stimulus is required to release the supercooled state, and the stimulus may be a temperature element or a physical element. The supercooled state is an unstable state, and some stimulus is required to release the supercooled state, and the stimulus may be a temperature element or a physical element. The supercooling state can be released by adjusting the temperature and the amount of the cold air in the aspect of temperature. The physical aspect may be relieved by applying an electric field, a magnetic field, physical vibration, microwaves, etc. to the store. The supercooling release process of the present application is a process of releasing supercooling of a stored article due to stimulus, in which the stored article is instantaneously warmed up to the freezing point temperature of the stored article and rapidly frozen until the stored article is completely frozen.

Specifically, the means for applying external stimulus to the storage in the supercooled state in the flash chamber may be either temperature-wise or physical-wise. The external stimulus may be generated by a device related to cooling in the refrigeration system, or may be generated by a supercooling release device provided separately, or may be generated by a combination of them. Thus, an electric field and/or a magnetic field and/or mechanical oscillation can be applied to the instant freezing chamber to solve the supercooling process, one or more of the means can be matched with a freezing fan and/or a condenser fan and/or a compressor and/or a capillary group and/or an instant freezing chamber air door of the refrigerating system, and supercooling release can be realized by controlling only the freezing fan and/or the condenser fan and/or the compressor and/or the capillary group and/or the instant freezing chamber air door of the refrigerating system.

Preferably, the supercooling release by means of temperature stimulation may be an increase in the cooling fan speed of the refrigeration system and/or an increase in the condenser fan speed and/or an increase in the compressor speed and/or a decrease in the capillary group flow and/or an increase in the flash chamber air supply. Further preferably, the refrigerating fan speed and/or the condenser fan speed and/or the compressor speed and/or the capillary group flow and/or the instant freezing chamber air supply quantity can be adjusted to have the maximum refrigerating capacity corresponding to the refrigerating system or provide the maximum refrigerating capacity to the instant freezing chamber. In the first stage of stage cooling, the temperature of the stored material is higher than the temperature difference of the instantaneous freezing chamber, and the larger cooling capacity is provided for the instantaneous freezing chamber, so that the rapid cooling in the precooling stage and the internal and external temperatures of the stored material are consistent as soon as possible so as to stably enter the supercooling state. When supercooling is released, providing a relatively large amount of cooling capacity to the flash chamber helps to efficiently release supercooling and achieve rapid breakthrough of the reservoir through the maximum ice crystal zone formation freezing.

Preferably, the electric field for removing supercooling can be an electrostatic field or an alternating electric field, and can be a high-voltage electrostatic field or a low-voltage electrostatic field according to the different electric field intensities; the frequency can be low-frequency electric field or high-frequency electric field, and the wave can be sinusoidal or non-sinusoidal, such as pulse square wave. It is found that different electric field types, different electric field intensities, different electric field frequencies and different voltage waveforms play different roles at different stages in the whole supercooling process, if the stimulation for releasing supercooling is applied by using the energy device, different electric field types and/or different electric field intensities and/or different electric field frequencies can be applied in different instant freezing processes, so that the instant freezing process can not only obtain the ice crystal state for improving the microstructure of the muscle fiber bundles and tendering the meat quality, but also obtain more comprehensive technical effects in the aspects of keeping the flavor and nutrition of food, the color and luster and the energy consumption of the refrigerator.

It is further noted that whatever the cooling is used, the formation of finer ice crystals in a short period of time is facilitated by the maximum ice crystal formation zone (typically-1 ℃ C. To-5 ℃ C.) and other adverse effects that lead to increased ice crystals and reduced frozen quality of the store can be counteracted. Therefore, we propose that the supercooling release phase of the stored article still preferably allows the stored article to be frozen completely and quickly, that is, the process b→c in fig. 1 (C) is completed in a shorter time, so that the time consumption of the whole supercooling freezing process is reduced, and the supercooling freezing effect is ensured. In the supercooling release stage, no matter what release means are adopted, the refrigerating device keeps larger refrigerating capacity in the supercooling release process, so that the instant freezing chamber can quickly reach the C state point from the B state point, and the freezing process from never freezing to totally freezing is very beneficial.

S3: the conventional refrigeration preservation process refers to the process of freezing preservation after the storage is frozen. The process is conventional preservation after the stored object is completely frozen in the supercooling state, and if conventional freezing means are adopted at the stage to maintain the stored object within a preset temperature range, the conventional refrigeration preservation process can be realized by controlling a freezing air door and/or a periodical start-stop mode of a compressor. In the embodiment, the final preservation temperature of the conventional refrigeration preservation process is controlled within the range of-5 ℃ to-18 ℃ preferably through the start-stop of the flash chamber air door.

But we have also surprisingly found that, in theory, the stock was already in a totally frozen state at the C-state point. However, at this time, the formation of ice crystals does not completely reach a stable state, and still has a certain capacity of solidifying small ice crystals into large ice crystals, and the temperature point is generally 0-5 ℃ lower than the freezing point. At this time, if the instant freezing chamber is cooled down at a relatively high cooling intensity and cooling speed when the instant freezing process of the stored object reaches the C state point, the obtained freezing effect is better than that obtained by the conventional freezing preservation mode (also commonly called as a common freezing mode) immediately after the C state point is reached.

Preferably, in the conventional refrigeration and preservation process of the embodiment, the instantaneous freezing chamber air door is controlled to be opened and closed continuously and reciprocally according to the preset temperature Tc:

(1) Starting up working point of the air door of the instant freezing chamber: t (T) _ON c＝Tc+T _B1 /2；

(2) The air door of the instant freezing chamber is closed to work point: t (T) _off c＝T _ON c-T _B2 /2；

Tc is the preset reference temperature of conventional refrigeration preservation;

T _B1 refers to the floating temperature of the starting point of the temperature changing chamber in the starting process of the compressor;

T _B2 indicating the start-stop temperature difference of the temperature changing chamber; t (T) _ON c>Tc>T _off c。

Preferably T _B1 The range of the value of (C) is 0 DEG C<T _B1 ≤2℃，T _B2 The range of the value of (C) is 0 DEG C<T _B2 ≤2℃。

As previously described, even if a supercooled state is experienced, if we can accelerate the freezing speed of the maximum ice crystal temperature zone, the possibility of ice crystallization becomes lower, and other causes of degradation in the frozen quality of the stock can be more favorably offset, achieving better quality freezing.

Based on this, the conventional refrigeration storage process of the present embodiment preferably does not stop the supercooling release operation immediately upon the freezing process reaching the C-state point as in FIG. 1 (C), and delays until the temperature of the stored material is lowered from the B-state point to T _off c＝T _ON c-T _B2 And/2, controlling the compressor or the flash chamber air door to be opened and closed continuously and reciprocally according to the preset temperature Tc. On one hand, the method can avoid the formation of large ice crystals by re-bonding ice crystals, and on the other hand, the method can avoid the degradation of supercooling and freezing quality caused by inaccurate temperature monitoring or asynchronous temperature drop inside and outside the storage, which leads to the fact that the temperature of the center of the storage does not exceed the maximum ice crystal band.

Accurate control of the supercooling process to ensure adequate supercooling of the stored product, but also to ensure rapid freezing after supercooling release, is an important guarantee for improving supercooling freezing quality, avoiding freezing time processes, and reducing refrigerator energy consumption.

However, the temperature of the instant freezing chamber is difficult to control according to the supercooling temperature condition of the stored object, and particularly the temperature distribution in the instant freezing chamber is difficult to uniformly maintain in the conventional refrigerating device, and aiming at the problem, the instant freezing chamber is arranged in the refrigerator, and the control system is used for controlling the refrigerating system to respectively perform the processes of supercooling and cooling, supercooling release and conventional refrigerating preservation, and meanwhile, the start-stop control of the compressor and the accumulated working time length control of the compressor are combined, so that the stable and uniform supercooling and cooling process can be ensured, meanwhile, the supercooling can be effectively released, the freezing process of the stored object is faster, the ice crystal is finer and more round, and the cutting can be easily realized without thawing; meanwhile, the damage of cells of the articles to be frozen is avoided, the loss of nutrient substances in the freezing and thawing processes is reduced, and the problems of overlong instant freezing process and overlarge energy consumption of refrigeration equipment are avoided.

Example 1: integral constitution of refrigeration equipment and corresponding instant freezing method embodiment

Example 1-1: integral construction of refrigerating apparatus

Fig. 2 is a schematic diagram of a refrigerator, which is a refrigeration apparatus with instant freezing function according to an embodiment of the present invention, and the refrigeration apparatus may be a commonly known apparatus with refrigerating function, such as a refrigerator, a freezer, a refrigerator, etc., and this embodiment is exemplified by a refrigerator. Specifically, the refrigerator may include a housing, a liner disposed within the housing, and a thermal insulation material filled between the housing and the liner. The inner container defines a cooling chamber for storing the object to be refrigerated, and the cooling chamber comprises a transient freezing chamber 12 for realizing a transient freezing function, wherein the transient freezing function can be a transient freezing chamber with a single transient freezing function or a transient freezing chamber which can be converted with a common freezing or refrigerating function. The refrigerator in this embodiment further includes a refrigerating chamber 11 and a freezing chamber 13. In addition, the instantaneous freezing chamber can be internally provided with a storage drawer so as to form a more airtight storage space, and can also be arranged into a rack type so as to form more uniform cold air flow in the instantaneous freezing chamber to ensure uniform temperature and uniform storage cooling. A door body for opening or closing the instant freezing chamber can be arranged at the front opening of the instant freezing chamber,

The door body can be a sliding door which is pushed and pulled left and right/up and down, and can also be a side-by-side door or a single door. Further, the refrigerator may also include common freezing and refrigerating functions and other instant freezing chambers, such as refrigerating and freezing chambers, for achieving the functions. As shown in fig. 2, a schematic structural diagram of a refrigerator according to an embodiment of the present invention is that a refrigerating chamber 11 is preferably disposed above a freezing chamber, a freezing chamber 13 is disposed below the freezing chamber, and the freezing chamber is located between the refrigerating chamber and the freezing chamber, so that a problem of odor tainting of the refrigerator due to rising of hot air can be prevented.

The instant freezing chamber can be used for storing various foods, and can be specially used for some foods or foods of certain types, so that the accuracy of instant freezing function control and the freezing quality are improved.

The item to be frozen in this embodiment may be a food product, in particular meat, which requires frozen storage.

The amount of cold required to store the items to be frozen comes from the refrigeration system. The refrigerator in an embodiment of the present invention includes a refrigeration system (not shown) that is configured to controllably provide cooling to the flash chamber, although other compartments may be controlled to provide cooling.

Fig. 3 shows a refrigeration system 200 for performing the instant freezing process cooling supply of the refrigeration apparatus according to the present embodiment. The refrigerating system comprises a compressor 23, a condenser 24, a throttling device (such as a capillary group) 270, a refrigerating evaporator 21 and other refrigerating components, which are sequentially connected by pipelines as shown in fig. 3 to form a closed system, and the refrigerant continuously circulates in the system to change the state and exchange heat with the outside. When the refrigerating system works, the evaporator continuously absorbs heat of the storage, the low-temperature low-pressure liquid state is converted into low-temperature low-pressure gas, the compressor sucks low-pressure working medium steam from the evaporator, the low-pressure steam is compressed into high-pressure steam, the high-pressure refrigerant steam is sent into the condenser, the high-pressure refrigerant steam is condensed into high-pressure liquid in the condenser, the low-pressure liquid is throttled by the capillary tube group and then is returned to the evaporator, the low-pressure liquid absorbs heat and is evaporated in the evaporator to become low-pressure steam, and the low-pressure steam is sent into an inlet of the compressor, so that continuous cyclic reciprocating phase change and refrigerating cycle are completed. Preferably, the present embodiment also provides a return air line assembly 220, a return air heat exchange section 221.

Further improving the supercooling performance of the refrigeration equipment. Further preferably, an anti-condensation tube 25 and a dry filter 26 are also included to ensure that the refrigerant does not ice-plug when the capillary tube is throttled.

Further, in order to efficiently release supercooling, the present embodiment provides an energy apparatus, which is an oscillating device 39.

The oscillation device 39 may be an ultrasonic oscillation device disposed inside the rear wall of the instant freezing chamber, and may be configured to apply ultrasonic waves to the storage in the supercooling release stage, promote the storage to be supercooled and rapidly and uniformly crystallized by using cavitation effect of the ultrasonic waves, accelerate the maximum ice crystal generation zone passing through the storage, well protect the integrity of cells of the storage, and greatly improve the freezing quality of the storage. Preferably, the wall surface of the compartment of the instant freezing chamber is made of special materials such as metal, so that potential safety hazards caused by leakage of electricity, magnetism and the like can be shielded.

The ultrasonic oscillation device can be further optimized, and the ultrasonic oscillation device can be started after the first cooling stage of the multi-stage cooling and supercooling process, so that the stored material can be subjected to physical oscillation through the rear wall of the instant freezing chamber. Such oscillations are also valuable for increasing the degree of supercooling, ensuring adequate supercooling.

As is well known to those skilled in the art, the ultrasonic generator is composed of a power transformer, an oscillator, a power amplifier, etc., and since the specific structure of the ultrasonic oscillation device itself is not the focus of the protection of the present application and is already the prior art, the present application will not be repeated.

In the present embodiment, an oscillation device 39 is provided, and the oscillation device 39 is an oscillation device that can generate mechanical oscillation. The oscillating device includes a pulse power source, an oscillating motor, an oscillatable bracket, and an oscillation conducting mechanism 121. The oscillating motor is connected with the oscillating bracket, when the oscillating device is controlled to start working, the pulse power supply applies pulse voltage to the oscillating motor, and the oscillating motor drives the oscillating bracket to horizontally reciprocate for a preset time with a preset oscillating amplitude. The oscillatable bracket and the oscillating motor can be arranged in the instant freezing chamber 12, and the pulse power supply can be arranged in the instant freezing chamber 12 or outside the instant freezing chamber 12. When the oscillation device 39 is controlled to start working, the oscillation device 39 applies an oscillation action to the oscillating bracket, the oscillation conduction mechanism 121 is arranged on one side of the instant freezing storage area box 120 used for storing objects in the instant freezing chamber, connection between the oscillating bracket and the instant freezing storage area box 120 used for storing objects in the instant freezing chamber 12 is achieved, the oscillation conduction mechanism 121 can conduct the mechanical oscillation action of the oscillation bracket to the box of the storage objects, so that the box of the storage objects mechanically oscillates and drives the storage objects in the instant freezing storage area box 120 to mechanically oscillate together, and the supercooled non-frozen state of the storage objects, particularly foods, in the supercooled state is destroyed through the mechanical oscillation, so that the supercooled state of the storage objects, particularly foods, to be stored in the instant freezing state is relieved.

As shown in fig. 4, when the preferred embodiment of the refrigeration system is used, the flow direction of the refrigerant is: compressor 23, condenser 24, anti-condensation tube 25, dry filter 26, electrically operated switching valve 28, capillary tube set 270 (capillaries 1-271 or capillaries 2-272), freeze evaporator 21, muffler assembly 220, compressor 23.

Preferably, the condenser 24 in this embodiment is further provided with a condenser fan 38 for enhancing the heat release of condensation.

The throttle device in this embodiment employs the capillary group 270, and switching of the capillary group and adjustment of the total throttle amount can be controlled by a control valve such as a three-way valve or an electric switching valve, or the like. In the present embodiment, a flow path control valve, that is, an electrically operated switching valve 28 in fig. 4 and 3 is provided in the capillary group 270 to adjust the flow rate of the capillary group. The capillary group is formed by combining capillaries with different pipe diameters, and the smaller the pipe diameter of the capillaries is, the stronger the throttling is. The flow path control valve can adjust the flow rate of the capillary group. In the present series of patent applications, two capillaries of different specifications are provided in the refrigeration system: the capillary tubes 1-271 and 2-272 reduce the flow rate of the capillary tube group when the supercooling process is released, and can reduce the temperature of the cold air, increase the amount of cold supply to the stored material in the instant freezer, and release the supercooling. When the refrigerating capacity of the instant freezing chamber is regulated only by changing the flow of the capillary group, the cooling capacity is maximum when the flow of the capillary group reaches the minimum value capable of maintaining the normal operation of the refrigerating system.

Preferably, an air duct is further formed in the refrigerator in this embodiment, and the cooling fan provides cool air cooled and dehumidified by the evaporator to the instant freezing chamber through the air duct to realize instant freezing of food stored in the instant freezing chamber. The air duct is communicated with an air inlet of the instant freezing chamber, and the air inlet is provided with an air door of the instant freezing chamber and a refrigerating fan for providing power for cold air entering the instant freezing chamber. The temperature of the instant freezing chamber can be adjusted by periodically opening and closing the air door of the instant freezing chamber. The refrigerating fan and the instantaneous freezing chamber air door are opened and closed as required and the air quantity is adjusted.

As shown in fig. 5, to achieve the above-described instant freezing function of the refrigeration apparatus, the present embodiment further provides a control unit 30 for performing instant freezing control, the control unit including: the controller 31, the display 32, the temperature sensor 33, the temperature regulating device 34, the infrared sensor 35, the frequency conversion board 36, the timer 37, the condenser fan 38, the oscillating device 39 and the electric switching valve 28 are respectively in control connection, wherein the controller 31 is respectively connected with the display 32, the temperature sensor 33, the temperature regulating device 34, the infrared sensor 35, the frequency conversion board 36, the timer 37, the condenser fan 38, the oscillating device 39 and the electric switching valve 28. The timer 37 counts the preset stop time of the working time of each section of the compressor, the controller 31 starts and stops the compressor or further controls the rotation speed according to the preset stage and the preset time, and when the rotation speed control is needed, the frequency conversion board 36 regulates the rotation speed of the compressor 23 by sending a compressor rotation speed regulating command to the frequency conversion board 36. What needs to be further explained is: the inverter board in this embodiment is only one example of the compressor rotation speed adjusting device, and it should not be understood that the use of the inverter board is the only means and necessary means for adjusting the rotation speed of the compressor according to the present invention.

Further, the user may select the instant freeze function via the display 32, and the control system performs an instant freeze chamber control method when the user selects the instant freeze function. Further, the control unit may further utilize the temperature adjusting device 34 to adjust the temperature of the instant freezing chamber according to one or more parameters of the ambient temperature, the type of the stored material, the initial temperature, the weight, the volume, etc., so as to adjust the preset cooling stage number, the multi-stage cooling duration and the preset accumulated working time of the compressor. Of course, this is not a necessary condition for the implementation of the present invention, and the starting of the instant freezing function is performed directly according to the preset steps in the controller according to the preset type of the stored material in the instant freezing chamber, the maximum storage capacity and the maximum refrigerating load of the instant freezing chamber, the cooling duration in the pre-cooling stage and each stage, the accumulated working duration and the duty ratio of the compressor.

Further, in order to ensure the reliability of the operation control of each stage of the instant freezing process, the present invention does not exclude the provision of a temperature sensor 33 such as a thermistor for detecting the temperature of the instant freezing chamber and transmitting the temperature information of the instant freezing chamber to the controller 31, and the provision of a non-contact infrared sensor 35 for monitoring the temperature of the stored matter and transmitting the temperature information of the stored matter to the controller 31 to assist the controller in controlling each stage of the process according to a timer.

The following gives a specific control method example of the embodiment of the refrigeration equipment according to the present invention, so that the cooling process can be uniformly cooled, the technical problems that the cooling depth is shallow, the cooling state cannot be well entered, and the cooling is released in advance are avoided (but this does not mean that the control equipment according to the present invention must use the following control method, nor that the control method must be implemented by using the refrigeration equipment with the above structure).

Specifically, the control unit controls the refrigeration equipment to realize the instant freezing function according to the following implementation example, and mainly comprises three process stages, namely a staged cooling and supercooling process, a supercooling release process and a conventional refrigeration preservation process, wherein the staged cooling and supercooling process is adopted in the supercooling and cooling process, and the staged cooling and supercooling process of the instant freezing chamber is controlled by controlling the accumulated working time and the duty ratio of each stage of the compressor, and the control unit is specific:

each cooling stage of the m stages is provided with a preset accumulated working time length of the compressor corresponding to the stage; the compressor is controlled to work stage by stage according to the preset accumulated working time length of each stage;

In each cooling stage, controlling the intermittent operation of the compressor and calculating the working time length of the compressor; the preset accumulated working time length of the compressor in the nth stage is recorded as

when the compressor completes the preset accumulated working time period in the nth stage

Then, automatically entering an n+1th descending section to cool the next stage until the preset accumulated working time length of the last m stage is finished +.>

When the stored object is in the supercooling release process, supercooling release operation is executed;

in order to improve the uniformity of cooling the storage and the control precision in the multi-stage cooling process, it is further preferred in the above embodiment that each cooling stage of m stages is provided with a preset stage cooling duration; in the cooling time period of each preset stage, the compressor is controlled to start and stop for preset single start time period, preset running period and preset accumulated working time period; the compressor is periodically operated step by step according to the preset stage cooling time length, the preset operation period, the preset single start time length and the preset accumulated working time length. For example, when the compressor is operated in the nth stage, the preset operation period is t _n i ", presetting the accumulated working time length as

n represents any natural number from 1 to m, n is more than or equal to 1 and less than or equal to m; t is t _n i represents the preset single start time length of the ith working period of the compressor in the nth stage; a preset cumulative operation time period of the compressor operating in the nth stage +.>

i is more than or equal to 1 and is a natural number; i is more than or equal to 1 and is a natural number;

preferably, the intermittent operation of the compressor is periodically started and stopped, the working period of the compressor in the nth stage is the sum of the starting time and the stopping time of the period, and the stopping time of the period is defined as t _n The i', i.e. the n-th stage compressor duty cycle is: t is t _n i"＝t _n i+t _n i'。

The supercooling minimum temperature is the minimum temperature of the stored supercooling process, the supercooling state near the minimum temperature becomes more unstable, and in order to secure a sufficient supercooling degree and a sufficient supercooling time, the control of the compressor is further optimized as: the more the temperature of the instant freezing chamber approaches the supercooled minimum temperature of the storage, the larger the duty cycle of the compressor is, and the longer the preset accumulated working time period is. I.e. at least the compressor from stage 2 onwards, the duty cycle ≡n+1 of stage n+1 is greater than the duty cycle ≡n of stage n, i.e. ≡n+1>A preset single start-up duration t of a preset operation period of the compressor in a (n, n+1) th stage _n+1 i is greater than the preset work cycle work time length t of the nth stage _n i, namely: t is t _n+1 i>t _n i. It is further preferable that the compressor is controlled to adopt a larger compressor duty ratio and a preset accumulated working time period in the cooling 1 st stage, that is, the pre-cooling stage, than in the 2 nd to m th stages of the multi-stage cooling process, so as to better ensure the supercooling freezing effect, to reduce the temperature uniformity of the stored object and to avoid the occurrence of surface skin cracking. Still further preferably, the present embodiment controls the duty cycle ≡1 of the cooling and supercooling process of the compressor at the 1 st stage to be maximum, and the accumulated working time of the compressor

Longest.

when the compressor works in the nth stage, the preset operation period is t _n i ", presetting the duration of single startup as t _n i, presetting the accumulated working time length as

n represents any natural number from 1 to m, n is more than or equal to 1 and less than or equal to m; t is t _n i represents the preset single start time length of the ith working period of the compressor in the nth stage; presetting accumulated working time length->

i is more than or equal to 1 and is a natural number;

Then, automatically entering an n+1th descending section to cool the next stage, and completing the preset accumulated working time length of the n+1th stage >

When the preset accumulated working time length of the last mth stage is finished

Entering a supercooling release process; and entering a conventional preservation stage after the supercooling release process reaches a preset supercooling release time.

Preferably, the compressor duty cycle of the stage 1 subcooling process of the staged subcooling process is controlled ₁ Accumulated working time of compressor

Longest.

Preferably, the control of the staged cooling process is performed by controlling the duty cycle of the n+1 stage of the compressor from stage 2 _n+1 Duty cycle greater than the nth stage of the compressor ≡ _n I.e. ≡ _n+1 >§ _n The method comprises the steps of carrying out a first treatment on the surface of the Preset single start time length t of preset running period of n+1 stage compressor _n+1 i is greater than a preset single startup time length t of a preset running period of an nth stage _n i, namely: t is t _n+1 i>t _n i；

Preferably, the staged cooling and supercooling process is controlled to cool the storage of the instant freezing chamber to-2 to-6 ℃, wherein the stage 1 cooling and supercooling process is controlled to cool the storage of the instant freezing chamber to 5 to-1 ℃; the conventional preservation period reduces the temperature to Tc, the value range of which is (0 ℃, -7 ℃).

Examples 1-2: specific control process of instantaneous freezing control method of refrigeration equipment

Fig. 6 is a specific control logic diagram of the instant freezing control method of the refrigeration equipment in this embodiment, and in detail, an embodiment of the instant freezing process control method of the instant freezing chamber is described in detail below with reference to fig. 6 and the foregoing embodiment of the refrigeration equipment.

S00: selecting a transient freeze storage function

The display is provided with a instant freeze selection key. When a user selects the instant freezing storage function on the display, the control unit controls the temperature of the instant freezing chamber through the temperature regulating device in three process sections, namely a staged cooling and supercooling process, a supercooling releasing process and a conventional refrigerating storage process. In this embodiment, 7 cooling stages are set in the staged cooling and supercooling process.

S01: staged cooling and supercooling process

The instantaneous freezing chamber is cooled in stages by a control device in the supercooling cooling stage, and particularly, the instant freezing chamber is cooled in stagesThe staged cooling process of the embodiment is controlled as follows: presetting the accumulated working time length of a compressor in the nth stage as

Presetting a single operation period of the compressor in an nth stage as t _n i ", presetting the single starting time length of the compressor as t _n i, presetting single stop time of the compressor as t _n i'，t _n i"＝t _n i+t _n i'。

It should be further noted that, in the control method of the present embodiment, the stage residence time of each cooling stage is controlled in the stage supercooling and cooling process, and the stage residence time of the nth cooling stage is set to t _n In the present embodiment, the stage residence time t of each stage in the stage-wise supercooling process _n Take the same value t _n The range of the value of (2) is 0h < t _n And the time is less than or equal to 6 hours. When the phase residence time of each phase is consistent, controlling the single stop time of the preset compressor in the nth cooling phase to be t _n i' are identical, t _n The value range of i' is 18min less than or equal to t _n i' is less than or equal to 22min. Because the stage residence time t of each stage in the stage-wise supercooling process is controlled in the control method of the present embodiment _n The values are the same, and the single stop time of the preset compressor in the nth cooling stage is controlled to be t _n i' are identical; controlling each cooling stage to preset single start time length t of compressor _n i is different, the accumulated working time of the compressor in the nth stage is as follows

And also different. I.e. when a certain cooling stage in the staged supercooling cooling process is preset, the single start time length t of the compressor is set _n i is longer, the compressor cumulative operation time of this stage +.>

The longer.

In each cooling stage in the stage supercooling cooling process, the compressor is controlled to be in each cooling stageIllumination stage residence time t _n And (5) running. The compressor is started and stopped once in the nth cooling stage as one operation period, and the compressor is operated in a periodical starting and stopping state in the nth cooling stage until the timer reaches the stage residence time t in the nth cooling stage _n And the instant freezing chamber enters an n+1th cooling stage, and the periodic start-stop control of the n+1th stage is also carried out on the compressor.

The specific stage control process is as follows:

step one: cooling stage 1: the compressor is controlled to operate at the rotating speed M1, the rotating speed of the condenser fan is S1, the flow of the capillary group is V1, and the compressor is controlled to operate at the preset single starting time length of t ₁ 1, starting up the machine, and a timer is at t ₁ 1 time, after the time is finished, executing the stop of the compressor, wherein the stop time of the compressor is preset single stop time t ₁ 1'; the timer accumulates the stop time of the compressor to t ₁ After 1', executing the starting work of the compressor, wherein the compressor is started for a preset single starting time length of t ₁ 2, starting up again, wherein the time length of the running-up start-up is t ₁ 2, continuously executing the compressor stop after the starting-up work, wherein the compressor stop time is preset single stop time t ₁ 2'; with this cycle, the timer counts the whole time at the same time, so that the compressor is started and stopped to periodically work for a period of time t ₁ And executing the second step. Wherein t is ₁ The value range of i is 12.8 min-t 1-13.2 min

Step two: cooling stage 2: the compressor is controlled to operate at the rotating speed M1, the rotating speed of the condenser fan is S1, the flow of the capillary group is V1, and the compressor is controlled to operate at the preset single starting time length of t ₂ 1, starting up the machine, and a timer is at t ₂ 1 time, after the time is finished, executing the stop of the compressor, wherein the stop time of the compressor is preset single stop time t ₂ 1'; the timer accumulates the stop time of the compressor to t ₂ After 1', executing the starting work of the compressor, wherein the compressor is started for a preset single starting time length of t ₂ 2, starting up again, wherein the time length of the running-up start-up is t ₂ 2, after starting up, stopping the compressor and pressingThe stop time of the compressor is preset single stop time t ₂ 2'; with this cycle, the timer counts the whole time at the same time, so that the compressor is started and stopped to periodically work for a period of time t ₂ And executing the third step, namely the 3 rd cooling stage. Wherein t is ₂ The value range of i is 4.8min less than or equal to t ₂ i≤5.2min。

Step three: 3, a cooling stage: the compressor is controlled to operate at the rotating speed M1, the rotating speed of the condenser fan is S1, the flow of the capillary group is V1, and the compressor is controlled to operate at the preset single starting time length of t ₃ 1, starting up the machine, and a timer is at t ₃ 1 time, after the time is finished, executing the stop of the compressor, wherein the stop time of the compressor is preset single stop time t ₃ 1'; the timer accumulates the stop time of the compressor to t ₃ After 1', executing the starting work of the compressor, wherein the compressor is started for a preset single starting time length of t ₃ 2, starting up again, wherein the time length of the running-up start-up is t ₃ 2, continuously executing the compressor stop after the starting-up work, wherein the compressor stop time is preset single stop time t ₃ 2'; with this cycle, the timer counts the whole time at the same time, so that the compressor is started and stopped to periodically work for a period of time t ₃ And executing the fourth step, namely the 4 th cooling stage. Wherein t is ₃ The value range of i is 6.3min less than or equal to t ₃ i≤6.7min。

Step four: and 4, a cooling stage: the compressor is controlled to operate at the rotating speed M1, the rotating speed of the condenser fan is S1, the flow of the capillary group is V1, and the compressor is controlled to operate at the preset single starting time length of t ₄ 1, starting up the machine, and a timer is at t ₄ 1 time, after the time is finished, executing the stop of the compressor, wherein the stop time of the compressor is preset single stop time t ₄ 1'; the timer accumulates the stop time of the compressor to t ₄ After 1', executing the starting work of the compressor, wherein the compressor is started for a preset single starting time length of t ₄ 2, starting up again, wherein the time length of the running-up start-up is t ₄ 2, continuously executing the compressor stop after the starting-up work, wherein the compressor stop time is preset single stop time t ₄ 2'; with this cycle, the timer counts the whole time at the same time, so that the compressor is started and stopped for a period of timeSexual operation phase residence time t ₄ And executing the fifth step, namely the 5 th cooling stage. Wherein t is ₄ The value range of i is 7.8min less than or equal to t ₄ i≤8.2min。

Step five: and 5, a cooling stage: the compressor is controlled to operate at the rotating speed M1, the rotating speed of the condenser fan is S1, the flow of the capillary group is V1, and the compressor is controlled to operate at the preset single starting time length of t ₅ 1, starting up the machine, and a timer is at t ₅ 1 time, after the time is finished, executing the stop of the compressor, wherein the stop time of the compressor is preset single stop time t ₅ 1'; the timer accumulates the stop time of the compressor to t ₅ After 1', executing the starting work of the compressor, wherein the compressor is started for a preset single starting time length of t ₅ 2, starting up again, wherein the time length of the running-up start-up is t ₅ 2, continuously executing the compressor stop after the starting-up work, wherein the compressor stop time is preset single stop time t ₅ 2'; with this cycle, the timer counts the whole time at the same time, so that the compressor is started and stopped to periodically work for a period of time t ₅ And step six, namely the 6 th cooling stage is executed. Wherein t is ₅ The value range of i is 9.3min less than or equal to t ₅ i≤9.7min。

Step six: and 6, a cooling stage: the compressor is controlled to operate at the rotating speed M1, the rotating speed of the condenser fan is S1, the flow of the capillary group is V1, and the compressor is controlled to operate at the preset single starting time length of t ₆ 1, starting up the machine, and a timer is at t ₆ 1 time, after the time is finished, executing the stop of the compressor, wherein the stop time of the compressor is preset single stop time t ₆ 1'; the timer accumulates the stop time of the compressor to t ₆ After 1', executing the starting work of the compressor, wherein the compressor is started for a preset single starting time length of t ₆ 2, starting up again, wherein the time length of the running-up start-up is t ₆ 2, continuously executing the compressor stop after the starting-up work, wherein the compressor stop time is preset single stop time t ₆ 2'; with this cycle, the timer counts the whole time at the same time, so that the compressor is started and stopped to periodically work for a period of time t ₆ And executing the seventh step, namely the 7 th cooling stage. Wherein t is ₆ The value range of i is 10.8min less than or equal to t ₆ i≤11.2min。

Step seven: and 7, cooling stage: the compressor is controlled to operate at the rotating speed M1, the rotating speed of the condenser fan is S1, the flow of the capillary group is V1, and the compressor is controlled to operate at the preset single starting time length of t ₇ 1, starting up the machine, and a timer is at t ₇ 1 time, after the time is finished, executing the stop of the compressor, wherein the stop time of the compressor is preset single stop time t ₇ 1'; the timer accumulates the stop time of the compressor to t ₇ After 1', executing the starting work of the compressor, wherein the compressor is started for a preset single starting time length of t ₇ 2, starting up again, wherein the time length of the running-up start-up is t ₇ 2, continuously executing the compressor stop after the starting-up work, wherein the compressor stop time is preset single stop time t ₇ 2'; with this cycle, the timer counts the whole time at the same time, so that the compressor is started and stopped to periodically work for a period of time t ₇ And executing the step eight. Wherein t is ₇ The value range of i is 12.8 min-t 7 min 13.2min.

It should be further described that the ith startup period t in the nth cooling stage in this embodiment _n i is equal, i is more than or equal to 1, i is a natural number; the ith shutdown time period t in the nth cooling stage in this embodiment _n i' are equal, i is more than or equal to 1, and i is a natural number.

S02: supercooling release process

The supercooling release process is also a process of instantaneously forming crystal nucleus and rapidly freezing the stored material in the instantaneous freezing chamber from the supercooled non-frozen state after external stimulus is applied. The external stimulus applied to the store (typically a food product) in the flash chamber may be from a temperature aspect or from a physical aspect, so long as the supercooled non-frozen equilibrium state of the store can be disrupted, allowing the supercooled state to be relieved.

The following will describe in detail the means by which the stored material can be supercooled, and further, it will be described that the supercooling releasing process may be performed by a single means or by a combination of means.

In this embodiment, the supercooling is released by physical oscillation and cooling capacity increase. Specifically, the supercooling release process is entered: starting the oscillating device, wherein the starting time is t'; the rotating speed of the condenser fan is increased from S1 of the stage cooling and supercooling process to S2, and the condenser fan operates in S2; the control unit controls the flow of the capillary tube group to be reduced from V1 to V2 in the process of cooling and supercooling in stages, and keeps the flow of V2 running, and further controls the electric switching valve to switch the capillary tube 1 in the capillary tube group to the capillary tube 2, so that the purpose of reducing the flow of the capillary tube group from V1 to V2 is realized; the speed of the compressor is increased from M1 to M2 in the staged cooling and supercooling process, and the compressor is operated at the speed of M2. The condenser fan is operated at S2 speed, the compressor is operated at M2 speed, and the capillary group is operated at V2 flow for a period of time.

Further, the opening of the oscillating device may be performed simultaneously with the adjustment of the operational parameters of the condenser fan, the compressor and the capillary group, or may be performed in a different order.

Further, t' is more than 0 and less than or equal to 10h.

Further, in order to more intuitively embody the parameter changes of the device involved in the cooling control and the device applying the physical stimulus in the whole supercooling process, the parameter changes of each device are further described in the form of a table:

TABLE 1 transient freezing Process control examples

Preferably, the rotation speed of the refrigerating fan is always kept at P1, and the rotation speed of the refrigerating fan is kept unchanged in the whole supercooling process.

Preferably, the working parameters of the instantaneous freezing chamber air door are unchanged all the time in the process of cooling and supercooling in stages and the process of supercooling and releasing, the opening of the instantaneous freezing chamber air door is always Q1, and the working parameters of the instantaneous freezing chamber air door are adjusted according to the temperature of the instantaneous freezing chamber in the conventional refrigeration preservation process.

Further, the compressor rotation speed, the condenser fan rotation speed and the capillary group flow rate at different stages are optimized as follows:

preferred capillary group flow rate: v1 is more than or equal to 4.5L/min and less than or equal to 5L/min, V2 is more than or equal to 2L/min and less than or equal to 3L/min;

Preferred condenser fans: s1 is more than or equal to 1200rpm and less than or equal to 1500rpm; s2 is more than or equal to 1600rpm and less than or equal to 1900rpm;

preferred compressor speed: m1 is less than or equal to 1200rpm and less than or equal to 1400rpm, M2 is less than or equal to 3800rpm and less than or equal to 4500rpm.

The beneficial effects of this embodiment lie in: it is possible to ensure that as much moisture as possible in the supercooled state of the food instantaneously forms ice crystals, passing through the maximum ice crystal formation zone rapidly.

S03: conventional refrigeration preservation process

The timer counts the supercooling release process S02, and when the preset supercooling release process duration is reached, the routine storage process S03 is entered, and it should be further noted that in this embodiment, the process S02 should be kept in the on state t' for the oscillating device, and the capillary tube group can be entered S03 only when the V2 flow, the condenser fan at S2 rotational speed, and the compressor at M2 rotational speed are operated together for t time. The temperature adjustment can be achieved by using the gear change of the freezing blower during the conventional preservation period, but the present embodiment preferably performs the conventional preservation process after the supercooling release process operation is completed as follows:

the conventional refrigeration preservation process is characterized in that the temperature of the storage matters in the instant freezing chamber is maintained at a preset temperature Tc, and Tc is more than or equal to-7 ℃ and less than 0 ℃;

Fig. 7 is a schematic view of the structure of the instant freezing chamber according to the present embodiment. The instant freezing chamber comprises an instant freezing storage area box 120, a temperature sensor 33, an infrared sensor 35 and an oscillation conduction mechanism 121. A flash storage area tank 120 may be provided in the flash chamber 12. The temperature sensor 33 and the infrared sensor 35 may be disposed on a side wall of the instant freeze storage area case 120 in the present embodiment, the temperature sensor 33 may be used to monitor the temperature of the instant freeze chamber 12, the infrared sensor may be used to monitor the temperature of the food stored in the instant freeze storage area case 120, and the oscillation conduction mechanism 121 may be disposed on a side wall of the instant freeze storage area case 120 to drive the instant freeze storage area case 120 to mechanically oscillate when the oscillation device is turned on.

Further, fig. 7 is only a schematic structural arrangement of the instant freezing chamber of the present invention, showing part of the components of the instant freezing chamber in this embodiment, and the structure of the instant freezing chamber shown in fig. 7 should not be construed as the only structure of the instant freezing chamber according to the present invention.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that this disclosure is not limited to the particular arrangements, instrumentalities and methods of implementation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A refrigeration apparatus comprising a flash chamber having a flash function, a refrigeration system for providing flash refrigeration to said flash chamber, and a control unit for controlling said refrigeration system to effect flash storage of said flash chamber, said control unit comprising a controller and a timer, characterized in that: the control unit performs a staged cooling and supercooling process on the instant freezing chamber by controlling the refrigerating system, wherein:

each cooling stage of the m stages is provided with a preset accumulated working time length of the compressor corresponding to the stage, and a timer counts the working time length and the downtime of the compressor in each cooling stage;

the controller controls the compressor to periodically work stage by stage according to a preset accumulated working time length; in each period, the compressor is controlled to be intermittently started and stopped according to a preset operation period;

Then, the controller controls the device to automatically enter the n+1th descending section to cool down in the next stage, and the preset accumulated working time length of the n+1th stage is finished>

So cooling step by step until the compressor completes the preset accumulated working time length of the last mth stage +.>

Wherein m is more than or equal to n is more than or equal to 1, and n is a natural number; the compressor preset accumulated operating time of the nth stage +.>

when the compressor finishes the last mth stage cooling and the corresponding preset accumulated working time length

Then, entering a supercooling release process;

the staged cooling process at least comprises 3 stages, the duty ratio of the compressor in the 1 st cooling stage of the staged cooling process is controlled to be maximum, and the accumulated working time of the compressor is controlled

The longest;

from the 2 nd cool down stage, the duty cycle of the n+1 th stage of the compressor is greater than the duty cycle of the n th stage of the compressor, i.e., ++1>2, ≡3; preset single start time length t of preset running period of n+1 stage compressor _n+1 i is greater than a preset single startup time length t of a preset running period of an nth stage _n i, namely: t is t _n+1 i>t _n i。

2. The refrigeration appliance of claim 1 wherein: the refrigerating equipment also comprises a condenser fan, a capillary group, a refrigerating fan and a flash chamber air door, and the control system is used for controlling the refrigerating fan to increase the rotating speed and/or the rotating speed of the condenser fan and/or the rotating speed of the compressor and/or the flow of the capillary group and/or the refrigerating fan to increase the flow rate and/or the flash chamber air door to adjust the flash chamber air door to relieve the supercooling process.

3. The refrigeration appliance of claim 1 wherein: the refrigerating apparatus includes supercooling release means, and an electric field and/or a magnetic field and/or physical oscillation is/are controlled to be applied to the flash chamber during supercooling multi-stage cooling and/or supercooling release.

4. A refrigeration apparatus according to claim 3 wherein: the supercooling release means is controlled to perform the supercooling release operation alone or in cooperation with a freezing blower and/or a condenser blower and/or a compressor and/or a capillary group and/or a flash chamber damper of a refrigeration system.

5. The refrigeration appliance of claim 1 wherein: the refrigerating equipment is also provided with an oscillating device, a capillary group and a condenser fan; starting an oscillating device in the supercooling release process, and keeping the oscillating device in a starting state to run for t' time; the flow of the capillary tube group is reduced to V2 flow from V1 flow in the process of cooling and supercooling in stages, V2 is smaller than V1, the rotation speed of the condenser fan is increased to S2 from S1 in the process of cooling and supercooling in stages, S1 is smaller than S2, the rotation speed of the compressor is increased to M2 from M1 in the process of cooling and supercooling in stages, M1 is smaller than M2, the capillary tube group keeps V2 flow, the rotation speed of the condenser fan keeps S2, and the rotation speed of the compressor keeps M2 to jointly run for t time.

6. The instantaneous freezing control method of the refrigeration equipment is characterized in that the refrigeration equipment is provided with an instantaneous freezing chamber and a refrigeration system which is used for cooling the instantaneous freezing chamber and provided with a compressor, and the instantaneous freezing control method is characterized in that: controlling the refrigerating system to implement a staged cooling and supercooling process for the instant freezing chamber, wherein:

The longest;

from the 2 nd cool down stage, the duty cycle of the n+1 th stage of the compressor is greater than the duty cycle of the n th stage of the compressor, i.e., ++1>2, ≡3; preset single start time length t of preset running period of n+1 stage compressor _n+1 i is greater than a preset single startup time length t of a preset running period of an nth stage _n i, namely: t is t _n+1 i>t _n i；

Then, entering a supercooling release process;

the control system releases the supercooling process by controlling increasing the speed of the freezing blower and/or increasing the speed of the condenser blower and/or increasing the speed of the compressor and/or reducing the flow of the capillary group and/or increasing the freezing blower and/or adjusting the instantaneous freezing chamber damper.

7. The refrigerating apparatus instant freeze control method according to claim 6, wherein: the cooling process and/or the supercooling release process are controlled to apply an electric field and/or a magnetic field and/or to apply physical oscillation to the flash chamber in the supercooling multi-stage.

8. The refrigeration appliance of claim 6 wherein: the supercooling releasing stage is controlled to independently apply an electric field and/or a magnetic field and/or apply physical oscillation to the instant freezing chamber to release supercooling operation or to perform supercooling releasing operation in cooperation with a freezing fan and/or a condenser fan and/or a compressor and/or a capillary group and/or an instant freezing chamber damper of a refrigerating system.

9. The refrigeration appliance of claim 8 wherein: the supercooling release process applies physical oscillation operation t' time to the instant freezing chamber, the flow of the capillary tube group is controlled to be reduced to V2 flow from V1 flow in the process of cooling and supercooling in stages in the supercooling release process, V2 is smaller than V1, the rotating speed of the condenser fan is increased to S2 from S1 in the process of cooling and supercooling in stages, S1 is smaller than S2, the rotating speed of the compressor is increased to M2 from M1 in the process of cooling and supercooling in stages, M1 is smaller than M2, the capillary tube group keeps the V2 flow, the rotating speed of the condenser fan keeps S2, and the rotating speed of the compressor keeps M2 to jointly operate for t time.

10. The instantaneous freezing control method of the refrigeration equipment is characterized in that the refrigeration equipment is provided with an instantaneous freezing chamber and a refrigeration system which is used for cooling the instantaneous freezing chamber and provided with a compressor, and the instantaneous freezing control method is characterized in that: in the implementation of the instant freezing chamber, the following instant freezing process is controlled:

s0: starting a transient freeze preservation mode;

Then, the process goes to a supercooling release process S2;

timing the supercooling release process S2, and entering a conventional refrigeration preservation process S3 after reaching the preset supercooling release process time;

The longest;

11. The refrigeration equipment instant freeze control method as claimed in claim 10, wherein: the 1 st cooling stage cools the storage matters in the instant freezing chamber to 5 ℃ to-1 ℃.

12. The refrigeration equipment instant freeze control method as claimed in claim 10, wherein: the staged cooling and supercooling process enables the storage matters in the instant freezing chamber to be cooled to minus 2 ℃ to minus 6 ℃.

13. The refrigeration equipment instant freeze control method as claimed in claim 10, wherein: after the supercooling release process operation is completed, a conventional refrigerating and preserving process is performed; the conventional refrigeration preservation process is characterized in that the temperature of the storage matters in the instant freezing chamber is maintained at a preset temperature Tc, and Tc is more than or equal to-7 ℃ and less than 0 ℃;

the control method for the conventional refrigeration preservation process to run according to the preset temperature Tc comprises the following steps: when the temperature of the instant freezing chamber reaches the starting temperature point T _ON c, opening a throttle of the instant freezing chamber; when the temperature of the instant freezing chamber reaches the first temperatureA stop temperature point T _OFF c, closing a throttle of the instant freezing chamber; t (T) _ON c＝Tc+T _B1 /2,T _OFF c＝T _ON c–T _B2 /2，T _ON c>Tc>T _OFF c；T _B1 Refers to the floating temperature of the starting point of the instant freezing chamber in the starting process of the compressor; t (T) _B2 Refers to the temperature difference of the instant freezing chamber.

14. The refrigeration equipment instant freeze control method as claimed in claim 10, wherein: wherein the S3 supercooling release process: supercooling release process: the refrigerating equipment is also provided with an oscillating device, a capillary group and a condenser fan; starting an oscillating device in the supercooling release process, and keeping the oscillating device in a starting state to run for t' time; the flow of the capillary tube group is reduced to V2 flow from V1 flow in the process of cooling and supercooling in stages, V2 is smaller than V1, the rotation speed of the condenser fan is increased to S2 from S1 in the process of cooling and supercooling in stages, S1 is smaller than S2, the rotation speed of the compressor is increased to M2 from M1 in the process of cooling and supercooling in stages, M1 is smaller than M2, the capillary tube group keeps V2 flow, the rotation speed of the condenser fan keeps S2, and the rotation speed of the compressor keeps M2 to jointly run for t time.