WO2018099456A1 - Refrigeration device and preservation control method therefor - Google Patents

Abstract

Provided are a refrigeration device and a preservation control method therefor. The refrigeration device comprises a box body (20) defining a storage space, a gas-adjusting membrane module (30), and an air pump (40); a sealed preservation subspace (271) is formed in a storage space, and the air pump (40) is configured to enable gas in the preservation subspace (271) of the storage space to permeate the air conditioning membrane module (30) so that a gas atmosphere beneficial to food preservation can be formed in the preservation subspace (271). The preservation control method comprises: determining a corresponding preservation operation mode according to the type of food, each preservation operation mode having a preset start-stop period of the air pump (40) to ensure that the gas atmosphere in the preservation subspace (271) meets the storage conditions of the food stored in the preservation subspace (271), so as to meet the storage requirements of different types of foods.

Description

Refrigeration and freezing device and fresh keeping control method thereof

The present application claims the priority of the Chinese patent application entitled "Refrigeration and Freezing Device and Its Preservation Control Method" on December 2, 2016, the application number is 201611097736.0, the entire contents of which are incorporated herein by reference. .

Technical field

The invention relates to the field of storage technology, in particular to a refrigerating and freezing device and a fresh-keeping control method thereof.

Background technique

Food is the source of energy for people to survive and is vital to people. For food storage, the two main aspects are heat preservation and preservation. Generally speaking, temperature has a significant effect on the microbial activity on food and the action of enzymes in food. The decrease in temperature will delay the deterioration of food, and the refrigerator will remain constant. A low-temperature refrigeration device is also a civilian product that keeps food or other items at a constant low temperature.

With the improvement of the quality of life, consumers are increasingly demanding the preservation of stored foods, especially the requirements for the color and taste of foods. Therefore, the stored food should also ensure that the color, taste, freshness, etc. of the food remain as constant as possible during storage. Therefore, users have put forward higher requirements for the preservation technology of the refrigerator.

In the prior art, the fresh-keeping technology of the refrigerator mainly adopts a vacuum preservation technology, and the vacuum fresh-keeping food excludes part of the air (oxygen) in the packaging container, destroying the conditions of growth of bacteria and microorganisms, thereby effectively preventing food spoilage and deterioration. The vacuum preservation methods currently used are vacuum bag preservation and vacuum storage room preservation.

Vacuum bags are used for fresh-keeping, consumers need to carry out vacuuming operations every time they store food, which is troublesome and cannot be enjoyed by consumers. The vacuum storage compartment is used for fresh-keeping. Because the box body is a rigid structure, it is required to maintain a vacuum state. The vacuum system is highly demanded, and the sealing performance of the refrigerator is very high. Each time an item is taken, a new one is poured in. More air, the consumption of energy in the refrigerator is greater.

On the other hand, in a vacuum environment in a refrigerator, it is difficult to receive cold food, which is particularly disadvantageous for food cooling. In addition, due to the vacuum environment, it takes a lot of effort for the user to open the refrigerator door every time, which causes inconvenience to the user. Although some refrigerators can be ventilated to the vacuum storage compartment through a vacuum system, this will cause the user to wait for a long time and have poor aging. The long vacuum time will also cause serious deformation of the refrigerator cabinet, that is, the existing refrigerator with vacuum structure can not complete the vacuum preservation well, and the strength of the box body is large, the requirements are high, and the cost is high. .

Summary of the invention

An object of the present invention is to provide a refrigerating and freezing device with low cost and good fresh-keeping effect and a fresh-keeping control method thereof.

It is a further object of the present invention to enable a refrigerated freezer and its freshness control method to meet the storage requirements of different types of food.

The invention firstly provides a fresh-keeping control method for a refrigerating and freezing device, wherein the refrigerating and freezing device comprises a box body defining a storage space, a gas regulating membrane module and an air pump, wherein the storage space has a sealed fresh-keeping sub-space. And the air pump is configured to infiltrate the gas in the fresh-keeping subspace of the storage space through the air-conditioning membrane module to form a gas atmosphere for food preservation in the fresh-keeping subspace of the storage space, and the freshness control method comprises: detecting the fresh-keeping subspace The type of food placed inside; the corresponding fresh-keeping operation mode is determined according to the type of food, and the refrigerating and freezing device is pre-set with a plurality of food-preserving operation modes, and each fresh-keeping operation mode is preliminarily provided with a start-stop period of the air pump. The start-stop period ensures that the gas atmosphere in the fresh-keeping sub-space meets the storage conditions of the food placed in the fresh-keeping sub-space; the driving pump is operated according to the determined start-stop period.

Optionally, the step of detecting the type of the food placed in the fresh-keeping sub-space comprises: detecting the odor in the fresh-keeping sub-space by using the odor sensor disposed in the fresh-keeping sub-space, and determining the kind of the food placed in the fresh-keeping sub-space by using the scent.

Optionally, the step of detecting the type of food placed in the fresh-keeping subspace includes: capturing an image of the fresh-keeping subspace by using a photographing device, and identifying the photographed image to determine the kind of food placed in the fresh-keeping subspace.

Optionally, before the step of detecting the type of the food placed in the fresh-keeping subspace, the method further comprises: detecting an event that the fresh-keeping sub-space is opened and closed; and detecting whether the food placed in the fresh-keeping sub-space appears after the fresh-keeping sub-space is opened and closed After the change, and the food placed in the fresh-keeping subspace changes, the step of detecting the type of food placed in the fresh-keeping subspace is performed.

Optionally, the fresh-keeping operation mode is further preset with an initial running time of the air pump, and the freshness keeping control method further includes: after determining that the fresh-keeping sub-space is opened, driving the air pump to remain closed; after determining that the fresh-keeping sub-space is closed, driving The pump is continuously running for the initial run time.

According to another aspect of the present invention, a refrigerating and freezing apparatus is further provided, comprising: a box body defined therein by a storage space, a sealed fresh-keeping sub-space in the storage space; a gas-regulating membrane module disposed in the fresh-keeping a sub-space; an air pump, whose inlet end is connected to the outside of the air-conditioning membrane module, and is configured to infiltrate the gas in the storage space of the storage space through the air-conditioning membrane module to form in the fresh-keeping subspace of the storage space a gas atmosphere for food preservation; a food detecting device for detecting the type of food placed in the fresh-keeping sub-space; a controller connected to the food detecting device and the control end of the air pump, and configured to: determine the corresponding according to the type of the food The fresh-keeping operation mode, the refrigerating and freezing device is pre-set with a variety of food corresponding fresh-keeping operation modes, and each fresh-keeping operation mode is pre-set with a start-stop period of the air pump, and the start-stop period is guaranteed. The gas atmosphere in the fresh sub-space meets the storage conditions of the food placed in the fresh-keeping subspace; the driving pump is operated according to the determined start-stop cycle.

Optionally, the food detecting device comprises: an odor sensor disposed in the fresh-keeping sub-space and configured to detect an odor in the fresh-keeping sub-space; and the controller is further configured to determine the kind of the food placed in the fresh-keeping sub-space by using the scent.

Optionally, the food detecting device comprises: a photographing device configured to capture an image of the fresh-keeping subspace; and the controller further configured to identify the photographed image to determine the type of food placed in the fresh-keeping subspace.

Optionally, the refrigerating and freezing device further includes: an opening and closing detector configured to detect an event that the fresh-keeping subspace is opened and closed; and a space detector configured to detect the placement of the fresh-keeping subspace after the fresh-keeping subspace is opened and closed Whether the food changes; the controller is further configured to perform the step of detecting the type of food placed in the fresh-keeping subspace after the food placed in the fresh-keeping subspace changes.

Optionally, the fresh-keeping operation mode is further preset with an initial running time of the air pump, and the controller is further configured to: after the opening and closing detector determines that the fresh-keeping subspace is opened, the driving air pump is kept closed; After determining that the fresh-keeping subspace is closed, the driving pump is driven to continue running for the initial running time.

The refrigerating and freezing apparatus and the fresh-keeping control method thereof of the present invention creatively propose to use a gas regulating membrane (for example, an oxygen-rich membrane) module to discharge a specific kind of gas (for example, oxygen) in the air in the sealed fresh-keeping subspace into the space, thereby In this space, a nitrogen-rich oxygen-poor or other gas atmosphere for food preservation is obtained. For example, the nitrogen-rich and oxygen-poor atmosphere reduces the oxygen content in the storage space of fruits and vegetables, reduces the aerobic respiration of fruits and vegetables, and ensures the basic respiration, preventing anaerobic respiration of fruits and vegetables, thereby achieving the purpose of long-term preservation of fruits and vegetables. Moreover, the present invention also maintains the gas atmosphere under the conditions most favorable to the food according to the type of food to be preserved, thereby maximally satisfying the needs of food storage.

Further, the refrigerating and freezing device of the present invention and the fresh-keeping control method thereof can automatically identify the type of food placed in the fresh-keeping subspace, thereby correspondingly selecting the best preservation mode, without user intervention, and having a high degree of intelligence, greatly improving The user's convenience and experience.

DRAWINGS

1 is a schematic view showing the principle of a refrigerating and freezing apparatus according to an embodiment of the present invention;

2 is a schematic structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention;

Figure 3 is a schematic structural view of another perspective of the structure shown in Figure 2;

Figure 4 is a schematic partial structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention;

Figure 5 is a schematic exploded view of the structure shown in Figure 4;

Figure 6 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention;

7 is a schematic diagram of a freshness control method of a refrigerating and freezing apparatus according to an embodiment of the present invention;

8 is an execution flow of a fresh-keeping control method of a refrigerating and freezing apparatus applied to a refrigerator according to an embodiment of the present invention.

detailed description

The invention will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, the embodiments are not intended to limit the invention, and the structural, method, or functional changes made by those skilled in the art in accordance with the embodiments are included in the scope of the present invention.

The refrigerating and freezing device of the embodiment of the invention adopts a gas regulating film to form a gas atmosphere in the fresh-keeping subspace to meet the storage and release requirements of the article, for example, an oxygen-rich film is used to form an oxygen-rich and nitrogen-depleted gas atmosphere. The working principle of the oxygen-rich membrane is that the permeation rate of each component in the air is transmitted through the oxygen-rich membrane, and the oxygen in the air is preferentially passed through the oxygen-rich membrane under the pressure difference driving. In the prior art, the oxygen-rich membrane is used. It is generally used to prepare oxygen for application in medical, fermentation, combustion and other fields. In the embodiment of the present invention, the refrigerating and freezing device uses the oxygen-rich membrane to discharge oxygen, so that the oxygen concentration in the fresh-keeping subspace is lowered, and a gas atmosphere conducive to food preservation is realized. Oxygen-rich membranes are permeable to all gases, except that different gases have different degrees of penetration. Gas permeation through the oxygen-rich membrane is a complex process. The permeation mechanism is generally that the gas molecules are first adsorbed onto the surface of the oxygen-rich membrane, then diffused in the oxygen-rich membrane, and finally desorbed from the other side of the oxygen-rich membrane. . The oxygen-rich membrane separation technique relies on the difference in dissolution and diffusion coefficients of different gases in the oxygen-rich membrane to achieve gas separation. When the mixed gas is subjected to a certain driving force (pressure difference or pressure ratio on both sides of the oxygen-rich membrane), a gas having a relatively high penetration rate such as oxygen, hydrogen, helium, hydrogen sulfide, carbon dioxide or the like is passed through the oxygen-rich membrane. The gas-enriched membrane is enriched on the permeate side, and a gas having a relatively slow permeation rate such as nitrogen, carbon monoxide or the like is retained on the retained side of the oxygen-rich membrane to be enriched to achieve the purpose of the mixed gas separation.

In this embodiment, the modified atmosphere preservation technology extends the food storage life by adjusting the gas atmosphere (gas composition ratio or gas pressure) of the enclosed space in which the storage object is located, and the basic principle is: in a certain closed space ( In the fresh-keeping subspace 271), a gas atmosphere different from the normal air component is obtained by various adjustment methods to suppress physiological and biochemical processes and microbial activities leading to spoilage of the stored matter (usually food). In particular, in this embodiment, the modified atmosphere preservation will be specifically directed to a modified atmosphere preservation technique that adjusts the proportion of gas components.

It is known to those skilled in the art that normal air components include (by volume percent, hereinafter the same): about 78% nitrogen, about 21% oxygen, about 0.939% rare gases (氦, 氖, argon, krypton, xenon,氡), 0.031% of carbon dioxide, and 0.03% of other gases and impurities (for example, ozone, nitrogen monoxide, nitrogen dioxide, water vapor, etc.. In the field of modified atmosphere preservation, it is usually used to fill the enclosed space with nitrogen-enriched gas. The oxygen content is reduced to obtain a nitrogen-rich and oxygen-poor fresh gas atmosphere. Those skilled in the art should know that the nitrogen-enriched gas refers to a gas having a nitrogen content exceeding the nitrogen content in the above-mentioned normal air, for example, the nitrogen content may be 95%. ～99%, or even higher; and the nitrogen-rich and oxygen-poor fresh gas atmosphere refers to a gas atmosphere in which the nitrogen content exceeds the above-mentioned normal air nitrogen content and the oxygen content is lower than the above-mentioned normal air oxygen content.

Although there are also atmosphere-preserving technologies in the prior art, the history can be traced back to the beginning of 1821 when German biologists discovered that fruits and vegetables can reduce metabolism at low oxygen levels. But until now, due to the large size and high cost of nitrogen-making equipment traditionally used for gas-conditioning preservation, the technology is basically limited to use in various large-scale professional storage (the storage capacity is generally at least 30 tons). . Therefore, vacuum preservation technology is generally used in small-sized refrigerating and freezing equipment such as refrigerators in the prior art.

In the present embodiment, the air-conditioning system is economically compacted and quieted by the above-described air-conditioning membrane module, and is suitable for use in a small-sized refrigerating and freezing apparatus such as a refrigerator, and its structure is as follows:

1 is a schematic view showing the principle of a refrigerating and freezing apparatus according to an embodiment of the present invention, FIG. 2 is a schematic structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention, and FIG. 3 is a schematic view of another view of the structure shown in FIG. Sexual structure diagram. As shown in the figure, an embodiment of the present invention provides a refrigerating and freezing apparatus, which may include a casing 20, a door body (not shown), a gas regulating membrane module 30, an air pump 40, and a refrigeration system (not shown). show). A storage space is defined in the casing 20 of the refrigerating and freezing apparatus, and the storage space can be configured as a refrigerating compartment 27, a freezing compartment 25, a changing greenhouse 26, and the like according to the cooling temperature. The refrigerating and freezing device may be a refrigerator having at least a refrigerating chamber 27 and a freezing chamber 25. The refrigeration system can be a conventional compression refrigeration system or a semiconductor refrigeration system or the like that provides refrigeration to the storage compartment by, for example, direct cooling and/or air cooling to provide the storage compartment with a desired storage temperature. In some embodiments, the storage temperature of the refrigerator compartment 27 may be 2 to 9 ° C, or may be 4 to 7 ° C; the storage temperature of the freezer compartment 25 may be -22 to -14 ° C, or may be -20 to 16 °C. The freezing compartment 25 is disposed below the refrigerating compartment 27, and the changing greenhouse 26 is disposed between the freezing compartment 25 and the refrigerating compartment 27. The temperature within the freezer compartment 25 typically ranges from -14 °C to -22 °C. The variable greenhouse 26 can be adjusted as needed to store the appropriate food.

In the present embodiment, a sealed fresh-keeping sub-space 271 is formed in the storage space, and the fresh-keeping sub-space 271 may be disposed in any of the above-described compartments, and preferentially disposed in the refrigerating compartment 27 and the changing greenhouse 26. For example, the fresh-keeping subspace 271 may be disposed in the lower storage space of the refrigerating compartment 27.

The door body is pivotally mounted to the case 20 and is configured to open or close a storage space defined by the case 20. In order to ensure the tightness of the fresh-keeping subspace 271, a small door may be provided on the inner side of the door body to open or close the fresh-keeping sub-space 271, thereby forming a double-layered door structure. In some alternative embodiments, the refrigerating and freezing apparatus may also form the above-described fresh-keeping subspace 271 using a drawer. The drawer may have a drawer body 22 and a drawer body 23. The fresh-keeping subspace 271 is formed by the drawer type storage compartment.

The drawer body 22 is fixed in the storage space (for example, the lower portion of the refrigerating chamber 27), and the drawer body 23 is slidably mounted on the drawer cylinder 22. The front end of the drawer body 23 is provided with an end plate, which cooperates with the drawer cylinder 22 The opening of the fresh-keeping subspace 271 is closed. One specific way is that the drawer body 23 can be operatively drawn outwardly and inwardly from the forward opening of the drawer body 22. The end plate closes the opening of the fresh-keeping subspace 271 by the sealing structure.

In some embodiments of the present invention, the drawer body 22 may form a seal with the end plate of the drawer body 23, which may be properly leaked to achieve air pressure balance. In some other embodiments, the air pressure balance can be ensured by providing millimeter-scale micropores or one-way valves on the drawer body 22.

In some embodiments of the invention, a locking device, a handle and a handle positioning device are provided between the drawer body 22 and the drawer body 23. When the door body is opened, the user first moves the handle up or down to the release lock position, and the handle positioning device holds the handle in this position, and the user can pull the drawer body 23 outward. When the door body is closed, the user first feeds the drawer body 23 into the drawer body 22, closes the drawer, and then returns the handle to the initial position downward or upward, and the handle positioning device keeps the handle in this position, thereby making the drawer cylinder 22 and the drawer body 23 remain in the locked state.

The refrigeration system may be a refrigeration cycle system composed of a compressor, a condenser, a throttle device, and an evaporator. The compressor is mounted in the compressor compartment 24. The evaporator is configured to provide cooling directly or indirectly into the storage space. For example, when the refrigerating and freezing device is a domestic compression type direct cooling refrigerator, the evaporator may be disposed outside or inside the rear wall surface of the inner casing 21. When the refrigerating and freezing device is a domestic compressed air-cooled refrigerator, the casing 20 further has an evaporator chamber, the evaporator chamber is connected to the storage space through the air passage system, and an evaporator is arranged in the evaporator chamber, and a fan is arranged at the outlet. To cycle cooling to the storage space. Since such refrigeration systems are well known and readily implemented by those skilled in the art, in order not to obscure and obscure the inventive aspects of the present application, the refrigeration system itself will not be described in further detail below.

The gas regulating membrane module 30 has a gas regulating membrane and a gas collecting chamber, and one side of the gas regulating membrane faces the gas collecting chamber to make the gas regulating membrane when the pressure of the gas collecting chamber is lower than the pressure of the other side of the gas regulating membrane The gas in the air on the other side, such as oxygen, passes through the gas regulating membrane into the gas-regulating gas collection chamber. Specifically, the other side of the air-conditioning membrane may be in direct contact with the fresh-keeping sub-space 271 or with the circulation flow path (or the circulation space) connected to the fresh-keeping sub-space 271, so that the pressure in the gas collection chamber is smaller than that of the sub-space. When the pressure is applied, the gas in the air in the fresh-keeping subspace 271 is allowed to pass through the gas-regulating membrane into the gas collecting chamber. When the oxygen-rich membrane is used, the oxygen in the fresh-keeping subspace 271 is extracted, thereby forming the fresh-keeping subspace 271. Oxygen-poor gas atmosphere. The air-conditioning membrane module 30 further includes a support frame having opposite first and second surfaces, and internally formed with at least one airflow passage communicating with the first surface and the second surface; the air-conditioning membrane is two, respectively Provided on the first surface and the second surface of the support frame to define an oxygen-rich gas collecting chamber together with at least one air flow passage of the support frame, and the support frame is further provided with a suction hole communicating with the at least one air flow passage for The air pump 40 is connected to discharge the gas.

The air pump 40 can be disposed in the compressor compartment 24, and the inlet end of the air pump 40 communicates with the gas collection chamber of the air conditioning membrane module 30 via the pipeline 50, and is configured to be evacuated outward so that the pressure of the gas collection chamber is less than the fresh-keeping The pressure of space 271. That is, the air pump 40 is configured to extract the gas in the fresh-keeping sub-space 271 outwardly, so that the air in the fresh-keeping sub-space 271 flows to the air-conditioning membrane module 30, and the fresh-keeping sub-function is made under the action of the air-conditioning membrane module 30. The part of the air in space 271 Part or all of the specific gas enters the gas collection chamber, and then the fresh-keeping sub-space 271 is discharged via the line 50 and the air pump 40. For example, oxygen is extracted to obtain a gas atmosphere rich in nitrogen and oxygen in the fresh-keeping subspace 271 to facilitate food preservation.

The refrigerating and freezing device of the invention can form a gas atmosphere rich in nitrogen and oxygen in the fresh-keeping sub-space 271 to facilitate food preservation, and the gas atmosphere reduces the oxygen content of the fruit and vegetable storage space, thereby reducing the aerobic respiration intensity of the fruits and vegetables, and ensuring the foundation. The respiration function prevents the fruits and vegetables from undergoing anaerobic respiration, thereby achieving the purpose of long-term preservation of fruits and vegetables. Moreover, the gas atmosphere also has a large amount of gas such as nitrogen gas, which does not reduce the cooling efficiency of articles in the subspace, and can effectively store fruits and vegetables and the like. The air pump 40 is disposed in the compressor compartment 24, and can fully utilize the space of the compressor compartment 24 without occupying other places, so that the extra volume of the refrigerating and freezing apparatus is not increased, and the structure of the refrigerating and freezing apparatus can be made compact.

In some embodiments of the invention, the air pump 40 is disposed at one end of the compressor bay 24. The compressor may be disposed at the other end of the compressor compartment 24 such that the distance of the air pump 40 from the compressor is relatively long, reducing noise superposition and waste heat stacking. For example, the air pump 40 may be disposed at one end of the compressor nacelle 24 adjacent to the pivoting side of the door body. When the refrigerating and freezing device is a door open refrigerator, the air pump 40 may be disposed at either end of the compressor nacelle 24. In other embodiments of the invention, the air pump 40 is disposed adjacent to the compressor, and the air pump 40 is disposed at one end of the compressor chamber 24 and between the compressor and the sidewall of the compressor bay 24.

In some embodiments of the invention, the air pump 40 may be mounted in a sealed box that may be mounted within the compressor compartment 24 by a mounting floor. The sealed box can largely block the noise and/or waste heat of the air pump 40 from propagating outward.

4 is a schematic partial structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention, and FIG. 5 is a schematic exploded view of the structure shown in FIG. 4, and the air conditioning membrane module 30 may be disposed in a cylinder of the drawer cylinder 22. Upper, preferably disposed on the top wall of the drawer body 22. Specifically, a receiving cavity 31 is disposed in the top wall of the drawer cylinder 22, and a first communication hole 222 and a second communication hole 223 communicating with the accommodating cavity 31 are opened on the inner side surface of the top wall of the drawer cylinder 22. The air conditioning membrane module 30 is disposed within the accommodating chamber 31. The accommodating chamber 31 constitutes a circulation space communicating with the fresh-keeping sub-space 271 to bring the air-conditioning membrane in the air-conditioning membrane module 30 into contact with the gas in the fresh-keeping subspace 271. The first communication hole 222 and the second communication hole 223 are both small holes, and the number may be plural. In some alternative embodiments, the inside of the top wall of the drawer body 22 has a recessed groove. The air conditioning membrane module 30 is disposed in a recessed groove of the top wall of the drawer body 22. Line 50 can include a vertical tube section. The vertical pipe section is disposed rearward of the storage space 211, and the lower end of the vertical pipe section communicates with the inlet of the air pump 41, and the upper side of the vertical pipe section communicates with the gas collection cavity 31 of the air conditioning membrane module 30.

In some embodiments of the present invention, in order to promote the flow of the gas in the fresh-keeping subspace 271 and the accommodating chamber 31, the refrigerating and freezing device may further include a fan 60 configured to cause the gas of the fresh-keeping sub-space 271 to enter the accommodating via the first communication hole 222. The chamber 31 and the gas in the accommodating chamber 31 enter the subspace via the second communication hole 223. The fan 60 is preferably a centrifugal fan disposed at the first communication hole 222 in the gas collection chamber 31. That is to say, the centrifugal fan 60 is located at least one An upper side of the communication hole 222, and the air inlet is opposite to the first communication hole 222. The air outlet of the centrifugal fan can face the air conditioning membrane module 30. At least one second communication hole 223 may be located below the air conditioning membrane module 30.

Further, the top wall of the drawer cylinder 22 includes a lower plate portion 224 and a cover portion 225. The upper surface of the lower plate portion 224 forms a recessed groove, and the cover portion 225 is covered in the recessed groove to form the receiving cavity 31. At least one first communication hole 222 is disposed at a front portion of the top wall, and at least one second communication hole 223 is disposed at a rear portion of the top wall. The centrifugal fan is disposed at the front of the accommodating chamber 31, and the air conditioned membrane module 30 is disposed at the rear of the accommodating chamber 31.

Figure 6 is a schematic block diagram of a refrigerating and freezing apparatus in accordance with one embodiment of the present invention. The refrigerating and freezing apparatus is further provided with a controller 110, a human-machine interaction device 120, an opening and closing detector 130, a food detecting device 150, and a space detector 160. The food detecting device 150 can be implemented using an odor sensor or a photographing device.

The controller 110 is configured to control the gas adjustment of the refrigerating and freezing device, perform gas adjustment according to the type of food stored in the fresh-keeping subspace 271, and control the air pump 40 accordingly (including a fan 60 or the like for passing air through the gas regulating film). Parts).

The food detecting device 150 is for detecting the kind of food placed in the fresh-keeping subspace. The food detecting device 150 detects the type of food by various means, for example, arranging the odor sensor in the fresh-keeping sub-space 271, and the odor sensor can be used to detect the odor in the fresh-keeping sub-space due to the difference in odor emitted by different foods. The odor sensor reflects information such as the pressure (concentration) of the gas in the fresh-keeping subspace as a corresponding press signal, which can be used as an integral part of the electronic nose (artificial olfactory system). The function of identifying odors is achieved by arranging an array of a plurality of types of odor sensors. The odor sensor can be made of a metal oxide semiconductor, a conductive polymer, a quartz crystal oscillator, a surface acoustic wave, an organic semiconductor, an LB film or the like, and the odor sensor responds to various components of the complex gas but differs from each other. A feature that uses a data processing method to identify multiple odors. When necessary, the controller 110 can perform pattern recognition of the scent by means of cloud technology, for example, uploading the measurement result of the odor sensor, performing pattern recognition by the cloud device, and selecting, by the controller 110, the corresponding preservation mode by using the identified food type. .

The food detecting device 150 detects the type of food and can also perform the image recognition. For example, an imaging device is disposed in the storage space in which the fresh-keeping subspace 271 is located, and is configured to capture an image of the fresh-keeping subspace. The captured image is identified by the controller 110 to determine the type of food placed in the fresh-keeping subspace. In this process, the controller 110 can perform pattern recognition of the image by means of cloud technology, for example, uploading the captured image, performing pattern recognition by the cloud device, and the controller 110 selects a corresponding preservation mode by using the identified food category.

The working modes of the above two kinds of food detecting devices 150 are merely exemplified. In the present embodiment, the type of food placed in the fresh-keeping sub-space 271 can also be determined by scanning code or the like.

The refrigerating and freezing device can be pre-set with a variety of fresh-keeping modes (such as vegetable preservation, fruit preservation, meat preservation, Fish preservation, etc.). The controller 110 can determine a corresponding fresh-keeping operation mode according to the type information of the food. Each fresh-keeping operation mode is preset with a start-stop period of the air pump 40, and the start-stop period ensures that the gas atmosphere in the fresh-keeping sub-space 271 conforms to the fresh-keeping subspace. The storage condition of the food stored in 271; the controller 110 is connected to the control end of the air pump 40, which can drive the air pump 40 to operate in accordance with the determined start and stop cycle.

Through research on the preservation characteristics of food, the inventors found that oxygen is closely related to the oxidation and respiration of food. The traditional view is that the lower the oxygen concentration, the more conducive to the preservation of food, but after the inventors have passed a large number of tests Out, the traditional view is not correct, and each food has the best preservation atmosphere. Table 1 shows the oxygen range for the optimal storage environment for some fruits and vegetables:

Table 1

Fruit and vegetable types	Oxygen concentration (unit%)
spinach	1
cabbage	2.5-5
Cabbage	2.5-5
cauliflower	2.5
asparagus	2.5-5
lettuce	1
apple	3
pear	1
tomato	3
Haricot vert	2

It can be seen from Table 1 that different foods have different preferred storage environments. Therefore, in this embodiment, the food can be tested in advance according to the preferred storage environment of the food, and the fresh-keeping operation mode is set, and the gas leakage in the fresh-keeping sub-space 271 is passed. The law of the pumping speed of the air pump 40 is summarized, so that when the air pump 40 is operated according to the start-stop period of the fresh-keeping operation mode, the gas atmosphere in the fresh-keeping sub-space 271 can be stably maintained at the required oxygen concentration range at all times. Inside.

The controller 110 can also determine the type of food placed in the fresh-keeping subspace 271 by automatic identification, thereby further selecting a corresponding fresh-keeping operation mode, by correspondingly controlling the air pump 40 and other components that pass the gas through the air-conditioning membrane module 30. The gas atmosphere in the fresh-keeping subspace 271 satisfies the storage conditions of the food.

Since the original gas atmosphere is destroyed after each opening of the fresh-keeping sub-space 271, it is necessary to delay the activation of the air pump 40 after the fresh-keeping sub-space 271 is opened and then closed. After the oxygen concentration of the fresh-keeping subspace 271 reaches the requirement of the storage condition, the controller 110 re-controls the pumping pump 40 to perform the pumping according to the determined fresh-keeping operation mode, so that the gas atmosphere of the fresh-keeping subspace 271 is stabilized to the best for the food. Under storage conditions.

In the refrigerating and freezing apparatus of the present embodiment, the opening and closing detector 130 may be arranged to detect an event that the fresh-keeping subspace 271 is opened and closed, and the opening and closing detector 130 may detect whether the fresh-keeping subspace 271 is opened or closed using a Hall device or the like. In use When the drawer type storage compartment is used as the fresh-keeping sub-space 271, the opening and closing detectors 130 may be respectively disposed on the end plates of the drawer body 23 and the drawer cylinder 22.

After determining that the fresh-keeping subspace 271 is opened, the controller 110 drives the air pump 40 to remain closed; after determining that the fresh-keeping sub-space 271 is closed, the driving air pump 40 is driven to continue the initial running time, and the fresh-keeping operation mode is also preset with an initial running time. . This initial run time ensures that the pumping pump 40 is in the fresh-keeping subspace 271 to form a set gas atmosphere.

The space detector 160 may be configured to detect whether a food placed in the fresh-keeping subspace 271 changes after the fresh-keeping subspace is opened and closed. The detection process by the food detecting device 150 is complicated. Therefore, it is possible to detect whether or not the food placed in the fresh-keeping subspace 271 is changed by the space detector, and to re-inspect the food detecting device 150 only after the food has changed. For example, the space detector 160 may use pressure or weight measurement to determine whether the food has changed. For example, if the weight of the item changes before and after the opening and closing of the fresh-keeping sub-space 271, it may be considered whether the food changes. If the food has not changed, the controller 110 can continue to use the previous fresh-keeping mode of operation for control.

The embodiment of the present invention further provides a fresh-keeping control method for a refrigerating and freezing device, which can be used for preserving control of the refrigerating and freezing device of the above embodiment, for example, by the controller 110 to complete the maintenance of the gas atmosphere. Features.

Fig. 7 is a schematic view showing a fresh-keeping control method of a refrigerating and freezing apparatus according to an embodiment of the present invention. The fresh-keeping control method of the refrigerating and freezing device may generally include:

Step S702, detecting the type of food placed in the fresh-keeping subspace 271;

Step S704, determining a corresponding fresh-keeping operation mode according to the type of the food;

In step S706, the air pump 40 is driven to operate according to the determined start and stop cycle.

In step S702, the type information of the food stored in the fresh-keeping subspace 271 can be determined by means of odor recognition or image recognition. For example, when performing odor recognition, step S702 may include detecting an odor in the fresh-keeping subspace using an odor sensor disposed in the fresh-keeping subspace 271, and determining the kind of the food placed in the fresh-keeping sub-space 271 using the scent. In performing image recognition, step S702 may include: capturing an image of the fresh-keeping subspace by using the photographing device, and identifying the photographed image to determine the kind of food placed in the fresh-keeping subspace.

The identification process of step S702 can also be implemented by using a cloud technology, for example, uploading a measurement result of a gas sensor or an image captured by a photographing device, and performing pattern recognition by the cloud device, and the controller 110 selects a corresponding fresh-keeping by using the identified food type. mode.

Because the recognition process requires a lot of calculations, it will consume some of the power. It is also possible to detect an event that the fresh-keeping subspace 271 is opened and closed before the step S702; after the fresh-keeping sub-space 271 is opened and closed, it is detected whether the food placed in the fresh-keeping sub-space changes, and the food placed in the fresh-keeping sub-space changes. After that, the food placed in the fresh-keeping subspace is detected. The steps of the kind.

The refrigerating and freezing device may be pre-set with a preserving operation mode corresponding to a plurality of foods, and each of the fresh-keeping operation modes is preliminarily provided with a start-stop period of the air pump 40, and the start-stop period ensures that the gas atmosphere in the fresh-keeping sub-space 271 conforms to the fresh-keeping subspace. Storage conditions for food preserved in 271.

In addition, the fresh-keeping operation mode may also be preset with the initial running time of the air pump 40. The freshness control method of the refrigeration and freezing device of the embodiment may further include detecting whether an initialization event occurs, and driving the air pump 40 to continue after the initialization event occurs. The initial run time is such that the fresh-keeping subspace 271 forms a gas atmosphere.

In the case of various events that may cause the gas in the fresh-keeping subspace 271 to leak, for example, a power-on event of the refrigerating and freezing apparatus or an event in which the fresh-keeping subspace 271 is opened and closed occurs. During the execution of step S706, an event that the fresh-keeping subspace 271 is opened and closed may be detected; after it is determined that the fresh-keeping sub-space 271 is opened, the driving air pump 40 is kept closed; after it is determined that the fresh-keeping sub-space 271 is closed, the air pump 40 is driven. Run the initial run time continuously.

After determining that the fresh-keeping subspace 271 is closed, it is also possible to determine whether the food in the fresh-keeping subspace 271 changes by weight, temperature, etc., and if there is a change, the food type is automatically recognized.

The specific process of the fresh-keeping control method of the refrigerating and freezing device of the present embodiment will be described below. Here, the refrigerating and freezing device is provided with a plurality of preserving modes, which can be configured according to the storage requirements of the user, for example, if the fresh-keeping mode and the leaf-preserving mode are used. , the melon type preservation mode, the meat preservation mode, etc., each preservation mode specifies the initial operation of the continuous operation of the air pump 40 in the process of reducing the oxygen concentration of the fresh-keeping subspace 271 to the optimal storage concentration range of various foods after initialization. The time, and the air pump 40 set according to the gas leakage condition of the fresh-keeping subspace 271, hold a positive start-stop period, and the start-stop period can ensure that the oxygen concentration of the fresh-keeping sub-space 271 is never within the above-mentioned optimal storage concentration range. In addition, the fresh-keeping sub-space 271 may be a drawer type storage space.

After the drawer is opened and a certain food is placed, it is detected that a closing event of the drawer has occurred, and automatic identification of the food is started to determine the type of food. If the food has not changed, the chilled freezer can still operate in the previous preservation mode.

After the drawer is closed and the door body is also closed, the air pump 40 is turned on for a predetermined time, and the initial running time specified in the current fresh-keeping mode is continuously operated, so that the oxygen concentration of the fresh-keeping sub-space 271 is lowered to the optimal storage concentration range. The air pump 40 is turned off for a predetermined time, then turned on, and turned off after a certain time is turned on, and the time of turning off and the time of turning on are both determined by the current freshness mode. Repeat the above procedure if the drawer is opened or the refrigerator is powered back on.

8 is an execution flow of a fresh-keeping control method for a refrigerating and freezing apparatus according to an embodiment of the present invention, which is applied to a refrigerator, and the execution flow includes the following steps:

Step S802, the user puts food into the fresh-keeping sub-space 271 of the refrigerator;

Step S804, detecting that the fresh-keeping sub-space 271 puts in new food, identifies the food type, and determines the fresh-keeping operation mode corresponding to the food;

Step S806, after the drawer is closed for n minutes, the air pump 40 is activated;

In step S808, according to the determined fresh-keeping operation mode, the air pump 40 is operated for a minute, then closed for b minutes, and the cycle starts and stops until the next fresh-keeping sub-space is opened.

In this embodiment, the photographing device (or the odor sensor) may be used for food identification, and the photographing device (or the odor sensor) may be placed outside the refrigerator (also disposed in the refrigerating chamber or the fresh-keeping sub-space 271), and the user recognizes after putting the food into the food. The type of food (can also be identified beforehand), the working cycle of the pump is determined according to the corresponding relationship between the preset food type and the fresh-keeping operation mode, and the above n, a, b can all be pre-defined by the fresh-keeping operation mode. .

The refrigerator can determine the type of the food automatically according to the weight and temperature change in the fresh-keeping sub-space 271, and automatically determine the operation mode of the air-pumping pump 40 according to the type of the food, and automatically perform control without any user intervention. Thereby greatly improving the degree of intelligence and the user experience.

The refrigerating and freezing apparatus of the present embodiment and the freshness control method thereof creatively propose to use a gas regulating membrane (for example, an oxygen-rich membrane) module to discharge a specific kind of gas (for example, oxygen) in the air in the sealed fresh-keeping subspace into the space. Thereby, a nitrogen-rich oxygen-poor or other gas atmosphere for food preservation is obtained in the space. For example, the nitrogen-rich and oxygen-poor atmosphere reduces the oxygen content in the storage space of fruits and vegetables, reduces the aerobic respiration of fruits and vegetables, and ensures the basic respiration, preventing anaerobic respiration of fruits and vegetables, thereby achieving the purpose of long-term preservation of fruits and vegetables. Moreover, according to the type of food to be preserved, the gas atmosphere is maintained under the conditions most favorable for the food, thereby maximally satisfying the needs of different food storage.

Further, the refrigerating and freezing device of the embodiment and the fresh-keeping control method thereof can automatically identify the type of food placed in the fresh-keeping subspace, thereby correspondingly selecting the best preservation mode, without user intervention, and the degree of intelligence is high, Improve user convenience and experience.

The detailed descriptions set forth above are merely illustrative of the possible embodiments of the present invention, and are not intended to limit the scope of the present invention. It is included in the scope of protection of the present invention.

Claims (10)

1. A fresh-keeping control method for a refrigerating and freezing device, the refrigerating and freezing device comprising a tank defining a storage space, a gas regulating membrane module, and an air pump, wherein the storage space has a sealed fresh-keeping sub-space, and The air pump is configured to infiltrate the gas in the fresh-keeping subspace of the storage space through the air-conditioning membrane module to form a gas atmosphere for food preservation in the fresh-keeping sub-space of the storage space, and the fresh-keeping Control methods include:

   Detecting the type of food placed in the fresh-keeping sub-space;

   Determining a corresponding fresh-keeping operation mode according to the type of the food, the refrigerating and freezing device is pre-set with a plurality of food-preserving operation modes, and each of the fresh-keeping operation modes is pre-set with a start-stop period of the air pump The start-stop period ensures that the gas atmosphere in the fresh-keeping sub-space conforms to the storage condition of the food placed in the fresh-keeping sub-space;

   The pump is driven to operate according to the determined start and stop cycle.
2. The method according to claim 1, wherein the detecting the kind of the food placed in the fresh-keeping subspace comprises: detecting the odor in the fresh-keeping subspace by using an odor sensor disposed in the fresh-keeping subspace, and The odor is used to determine the type of food placed in the fresh-keeping subspace.
3. The method according to claim 1, wherein the step of detecting the kind of food placed in the fresh-keeping subspace comprises:

   An image of the fresh-keeping subspace is captured by a photographing device, and the captured image is identified to determine the type of food placed in the fresh-keeping subspace.
4. The method according to claim 1, wherein before the step of detecting the type of food placed in the fresh-keeping subspace, the method further comprises:

   Detecting an event that the fresh-keeping subspace is opened and closed;

   After the fresh-keeping subspace is opened and closed, detecting whether there is a change in the food placed in the fresh-keeping subspace, and after detecting a change in the food placed in the fresh-keeping sub-space, performing detection of the placement in the fresh-keeping subspace The steps of the type of food.
5. The method according to claim 4, wherein the fresh-keeping operation mode is further provided with an initial running time of the air pump, and the freshness control method further comprises:

   After determining that the fresh-keeping subspace is opened, driving the air pump to remain closed;

   After determining that the fresh-keeping subspace is closed, the pump is driven to continue to operate the initial running time.
6. A refrigerating and freezing device comprising:

   a box body defined therein by a storage space, wherein the storage space has a sealed fresh-keeping sub-space;

   a gas regulating membrane module disposed at the fresh-keeping subspace;

   An air pump having an inlet end connected to an outer side of the air conditioning membrane module and configured to infiltrate a gas of the storage space of the storage space through the air conditioning membrane module to preserve the storage space Forming a gas atmosphere that is conducive to food preservation in the subspace;

   a food detecting device for detecting a type of food placed in the fresh-keeping sub-space;

   a controller, connected to the food detecting device and the control end of the air pump, and configured to: determine a corresponding fresh-keeping operation mode according to the type of the food, wherein the refrigerating and freezing device is pre-set with a plurality of foods corresponding to fresh-keeping In the operation mode, each of the fresh-keeping operation modes is pre-set with a start-stop period of the air pump, and the start-stop period ensures that the gas atmosphere in the fresh-keeping sub-space conforms to the food placed in the fresh-keeping sub-space The storage condition is driven; the pump is driven to operate according to the determined start-stop period.
7. The refrigerating and freezing apparatus according to claim 6, wherein said food detecting means comprises:

   An odor sensor disposed in the fresh-keeping subspace and configured to detect an odor in the fresh-keeping subspace;

   The controller is further configured to determine a type of food placed in the fresh-keeping subspace using the scent.
8. The refrigerating and freezing apparatus according to claim 6, wherein said food detecting means comprises:

   a photographing device configured to capture an image of the crisp subspace; and

   The controller is further configured to identify the captured image to determine the type of food placed in the fresh-keeping subspace.
9. The refrigerating and freezing apparatus according to claim 6, further comprising:

   An opening and closing detector configured to detect an event that the fresh-keeping subspace is opened and closed;

   a space detector configured to detect whether a food placed in the fresh-keeping subspace changes after the fresh-keeping subspace is opened and closed;

   The controller is further configured to perform a step of detecting a type of food placed in the fresh-keeping subspace after a change in food placed in the fresh-keeping subspace.
10. The refrigerating and freezing apparatus according to claim 9, wherein said fresh-keeping operation mode is further provided with an initial running time of said air pump, and said controller is further configured to:

    After the opening and closing detector determines that the fresh-keeping subspace is opened, driving the air pump to remain closed;

    After the opening and closing detector determines that the fresh-keeping subspace is closed, the air pump is driven to continue to operate the initial running time.

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