CN113446798A

CN113446798A - Fresh-keeping device and refrigerator

Info

Publication number: CN113446798A
Application number: CN202010211861.XA
Authority: CN
Inventors: 任相华; 刘运斌; 任志洁; 张瑞钦; 邵啟鹏
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2021-09-28
Anticipated expiration: 2040-03-24
Also published as: WO2021190013A1; CN113446798B

Abstract

The invention discloses a fresh-keeping device and a refrigerator comprising the same, wherein the fresh-keeping device comprises: the fresh-keeping box body is provided with an accommodating space and an opening communicated with the accommodating space; the refrigeration shell is arranged on the outer side of the preservation box body and provided with a refrigeration air channel, the refrigeration air channel is used for refrigerating the accommodating space, and the refrigeration shell is provided with a first heat preservation layer; the drawer can enter and be contained in the containing space through the opening so as to form a closed containing space by matching with the preservation box body. The refrigeration casing sets up in the outside of fresh-keeping box body, and the accommodation space cooling of fresh-keeping box body is gone up to the refrigeration wind channel in the air conditioning accessible refrigeration casing, realizes accommodation space's temperature regulation and control, can adjust the accommodation space temperature according to the suitable save temperature of different edible materials under the prerequisite that does not influence the low oxygen gas conditioning function, prolongs the storage cycle of food.

Description

Fresh-keeping device and refrigerator

Technical Field

The invention belongs to the field of refrigeration storage equipment, and particularly relates to a fresh-keeping device and a refrigerator thereof.

Background

In the field of modified atmosphere preservation of refrigerators, in order to control gas components within a certain range, a preservation closed space needs to be provided. However, the inside air of the enclosed space can not circulate with the outside air, and the external cold source can not enter the enclosed space to effectively control the temperature of the enclosed space by convection, so that the temperature of the enclosed space is too high to achieve the best effect of storing food.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a fresh-keeping device which can effectively and rapidly cool the closed space of the air-cooled refrigerator and prolong the fresh-keeping period of food.

The invention also provides a refrigerator with the fresh-keeping device.

The freshness keeping device according to an embodiment of a first aspect of the present invention is used for a refrigerator, and includes: the fresh-keeping box body is provided with an accommodating space and an opening communicated with the accommodating space; the refrigeration shell is arranged on the outer side of the preservation box body and provided with a refrigeration air channel, the refrigeration air channel is used for refrigerating the accommodating space, and the refrigeration shell is provided with a first heat preservation layer; the drawer can enter and be contained in the containing space through the opening so as to form a closed containing space by matching with the preservation box body.

The fresh-keeping device provided by the embodiment of the invention at least has the following beneficial effects: the refrigeration casing sets up in the outside of fresh-keeping box body, and the accommodation space cooling of fresh-keeping box body is gone up to the refrigeration wind channel in the air conditioning accessible refrigeration casing, realizes accommodation space's temperature regulation and control, can adjust the accommodation space temperature according to the suitable save temperature of different edible materials under the prerequisite that does not influence the low oxygen gas conditioning function, prolongs the storage cycle of food.

According to some embodiments of the invention, the fresh-keeping device further comprises a heat-insulating shell, an installation space for accommodating the fresh-keeping box body is formed between the heat-insulating shell and the refrigeration shell, and the heat-insulating shell is provided with a second heat-insulating layer.

According to some embodiments of the invention, the crisper body comprises a heat exchange surface in heat transfer communication with the refrigeration air duct, at least a portion of the heat exchange surface being made of a metallic material.

According to some embodiments of the invention, the crisper comprises a heat exchange surface in heat transfer communication with the refrigeration air duct, the heat exchange surface being corrugated.

According to some embodiments of the present invention, the fresh food box body includes a heat exchange surface in heat transfer with the cooling air duct, the heat exchange surface being located at a top of the accommodating space.

According to some embodiments of the invention, an oxygen regulating device is connected to the receiving space for regulating the oxygen content in the receiving space.

According to some embodiments of the invention, the refrigeration air duct is defined by walls of the refrigeration housing and the crisper.

According to some embodiments of the present invention, the refrigeration housing is provided with an air inlet and an air return which are communicated with the refrigeration air duct, and the air inlet and the air return are located on the same side of the refrigeration housing.

According to some embodiments of the present invention, a partition plate is disposed in the refrigeration housing between the air inlet and the air return inlet, and the partition plate partitions the refrigeration air duct into an air inlet channel and an air return channel.

A refrigerator according to a second aspect embodiment of the present invention includes: a refrigerated compartment; the refrigerating air duct is communicated with the refrigerating compartment and is provided with an air outlet; the fresh-keeping device is arranged in the refrigerating chamber, wherein the refrigerating air duct is communicated with the air outlet.

The refrigerator provided by the embodiment of the invention has the technical effects of at least the following beneficial effects: the independent fresh-keeping device is arranged in the cold storage chamber of the refrigerator, so that the purposes of the refrigerator are increased, and the fresh-keeping environment of the accommodating space cannot be influenced by starting the refrigerator door.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a freshness retaining device according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a rear view of the fresh keeping apparatus shown in FIG. 1;

FIG. 3 is a sectional view A-A shown in FIG. 2;

fig. 4 is a B-B sectional view shown in fig. 2.

Reference numerals: a fresh-keeping device 100; a refrigeration housing 101; a fresh-keeping box body 102; a sealing strip 103; a drawer 104; a heat-insulating case 105; an ionized oxygen module 106; the accommodation space 107; a heat exchange surface 108;

an air inlet 201; an air return opening 202;

an accommodating space 301; a cooling air duct 302;

a partition 401.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 4, there is shown a freshness keeping apparatus 100 according to a first aspect of the present invention, which is used in a refrigerator, which may refer to a broad refrigeration storage device, such as a refrigerator, an electric freezer, and a refrigerated counter.

In some embodiments, referring to fig. 1, the freshness protection device 100 includes a refrigeration housing 101, a freshness protection box 102, a sealing strip 103, a drawer 104, a heat preservation housing 105 and an ionized oxygen module 106, wherein the freshness protection box 102 is provided with an accommodating space 107 and a heat exchange surface 108, and is provided with an opening communicated with the accommodating space 107, and the drawer 104 can enter into the accommodating space 107 through the opening and be accommodated therein to form a closed accommodating space 301 in cooperation with the freshness protection box 102. The sealing strip 103 is arranged at the opening of the accommodating space 107, so that the drawer 104 is matched with the preservation box body 102 more tightly, and the tightness of the accommodating space 301 is ensured.

The ionized oxygen module 106 is connected to the fresh-keeping box body 102, when the ionized oxygen module 106 works, oxygen in the accommodating space 301 is consumed, when the oxygen concentration is reduced to a set value, the ionized oxygen module 106 stops working, and because the accommodating space 301 is relatively closed, the oxygen concentration can be kept for a certain time, so that a fresh-keeping environment is provided; when the oxygen concentration rises to the set value, the ionized oxygen module 106 is opened, and the circulation can keep the oxygen concentration within the set range for a long time.

In the above example, the ionized oxygen module 106 consists of a cathode of an air electrode rolled from manganese dioxide-activated carbon-polytetrafluoroethylene, an anode of a metallic nickel mesh, and a 30% K2CO3 solution conducting solution. The ionization reaction process is as follows: oxygen penetrates through the waterproof breathable film and is dissolved in a K2CO3 solution; oxygen in the solution reacts under the catalysis of electrode manganese dioxide to generate hydroxyl (OH-) ions; hydroxyl (OH-) ions move to the nickel metal anode under the action of an electric field; the hydroxyl (OH-) ions react at the nickel metal anode to generate oxygen, and the oxygen is gathered into bubbles near the anode and is discharged out of the system through an oxygen conveying system. The oxygen in the solution is consumed by the cathode reaction, the oxygen concentration in the solution is unsaturated, the oxygen in the air in the preservation box body 102 penetrates through the breathable film to be dissolved into the solution, the reaction is continuous, and the oxygen in the preservation box body 102 is continuously consumed, so that the purpose of reducing the oxygen concentration of the preservation box body 102 is achieved.

In some embodiments, the ionized oxygen module 106 may be replaced with a nitrogen generating device. The nitrogen generating device is connected to one side of the fresh-keeping box body 102 and can charge the generated nitrogen into the accommodating space 301. The nitrogen generating device adopts a mode of increasing the content of nitrogen and realizes the effect of reducing the concentration of oxygen in a mode of relatively reducing the content of oxygen. It can be understood that, in order to reduce the oxygen content, other oxygen adjusting devices may be used, and the oxygen adjusting device may be connected to the fresh-keeping box body 102, or may be separated from the fresh-keeping box body 102, and is separately disposed, that is, after the oxygen adjusting device adjusts the oxygen content for the accommodating space 301, the fresh-keeping device 100 is placed in the refrigerator.

In the above embodiment, the nitrogen generator uses a pressure Swing adsorption (psa) method to remove oxygen from air (in this embodiment, cold air in a refrigerator) to generate pure nitrogen, and then injects the nitrogen into the accommodating space 301 to keep food such as fruits and vegetables fresh. Pressure swing adsorption is a mainstream technology for producing gas at present, and particularly means that under the condition of unchanged temperature, mixed gas is pressurized, an adsorbent is used for adsorbing redundant impurity gas so as to obtain relatively pure single gas, and then the impurity gas in the adsorbent is desorbed by a method of reducing pressure or normal pressure so as to carry out secondary utilization on the adsorbent. The oxygen adsorbent is a common adsorbent for extracting nitrogen from air by realizing oxygen-nitrogen separation at present, and the adsorption capacity of the oxygen adsorbent to oxygen is greatly higher than that to nitrogen when the adsorption pressure is the same. The PSA nitrogen production method utilizes the principle, takes air as raw material, applies pressure swing adsorption technology, and utilizes selective adsorption of oxygen and nitrogen by oxygen adsorbent to realize separation of nitrogen and oxygen in the air, thereby producing pure nitrogen.

It should be noted that, in the above embodiments, the oxygen content in the accommodating space 301 is adjusted for illustration, in other embodiments, the fresh-keeping device 100 may also adjust the content of other gas components, and the adjusting manner may refer to the oxygen adjusting embodiment.

In the above embodiment, in order to ensure that the drawer 104 can conveniently enter the accommodating space 107 and accurately close the accommodating space 107 to form the closed accommodating space 301, the fresh food box 102 is provided with a guide rail therein, and those skilled in the art can know that a guide mechanism (not shown in the drawings) matched with the guide rail is also provided at the bottom of the drawer 104.

With continued reference to fig. 1, the refrigeration housing 101 is disposed outside the fresh food box 102, the refrigeration housing 101 is provided with a refrigeration air duct 302, and the refrigeration air duct 302 refrigerates the accommodating space 107 through the heat exchanging surface 108. It should be noted that the refrigeration housing 101 is provided with the refrigeration air duct 302, which may mean that the refrigeration air duct 302 is completely an inner cavity of the refrigeration housing 101, or that the refrigeration air duct 302 is located between the refrigeration housing 101 and the fresh-keeping box body 102, and is defined by the refrigeration housing 101 and the fresh-keeping box body 102 together.

The heat exchange surface 108 is one of the walls of the fresh-keeping box body 102, the refrigeration air duct 302 is connected with the refrigerator air duct, low-temperature air in the main air duct of the refrigerator enters the refrigeration air duct 302, heat exchange is carried out through the heat exchange surface 108, and cold energy is transmitted to the accommodating space 107, so that food in the re-drawer 104 is cooled. The air door is arranged in the refrigerator air duct, and the temperature of the accommodating space 301 can be adjusted by adjusting the opening and closing of the air door. The interior of the accommodating space 301 is not provided with an air supply outlet, the refrigeration air duct 302 is an external circulation air duct of the preservation box body 102, and the cold air can cool the wall surface of the preservation box body 102 through the refrigeration air duct 302 to realize the regulation and control of the temperature of the accommodating space 301. The temperature of the accommodating space 107 is regulated by cooling the accommodating space 107 of the preservation box body 102, so that the temperature of the accommodating space 107 can be regulated according to the suitable preservation temperature of different food materials on the premise of not influencing the low-oxygen gas regulation function, and the storage period of food is prolonged.

The refrigeration shell 101 is provided with a first heat preservation layer, one side of the refrigeration shell 101 is in contact with the heat exchange surface 108 of the fresh-keeping box body 102, and other sides of the refrigeration shell 101, which are not in contact with the heat exchange surface 108 of the fresh-keeping box body 102, can be provided with the first heat preservation layer, so that the cold energy is controllably and directionally transmitted to the accommodating space 301, the cooling speed in the accommodating space 301 can be high, and the temperature in the accommodating space 301 can have a large temperature difference with the outside of the fresh-keeping box body 102. Particularly, when the ionized oxygen module 106 works, a certain amount of heat is generated, which affects the temperature of the fresh-keeping box 102, and may cause the temperature inside the accommodating space 107 to be higher than the temperature outside the fresh-keeping box 102, and by providing the cooling air duct 302 and the first heat-preserving layer in the cooling housing 101, the cooling capacity is controllably and directionally transmitted to the accommodating space 301, so that the cooling speed inside the accommodating space 301 is fast, and the problem can be effectively overcome.

In some embodiments, an installation space for accommodating the fresh food box 102 is formed between the heat-insulating housing 105 and the refrigerating housing 101, and the heat-insulating housing 105 is provided with a second heat-insulating layer. Like this fresh-keeping box body 102 is by the cladding again between first heat preservation and the second heat preservation, has effectively improved fresh-keeping box body 102's heat preservation effect, when adjusting accommodation space 107 temperature, can make accommodation space 107 and fresh-keeping box body 102's outside temperature keep the certain difference in temperature to can adjust the temperature that is fit for different edible materials fresh-keeping.

In some embodiments, as shown with reference to fig. 2 and 3, the heat exchange surface 108 is located at the top of the accommodating space 107, i.e., the refrigeration housing 101 is disposed above the crisper housing 102. The refrigeration shell 101 is directly placed on the preservation box body 102, and the side surface of the refrigeration shell 101 and the side surface of the preservation box body 102 can be connected into a whole through the assembly of a common double-sided adhesive tape or a common clamping hook, or the bottom surface of the refrigeration shell 101 and the top surface of the preservation box body 102 are connected into a whole. It is understood that in some embodiments, the refrigeration shell 101 may be disposed on a side or bottom surface of the fresh food compartment 102. The refrigeration shell 101 is arranged at the top of the preservation box body 102, and has the advantages that the air in the drawer 104 mainly exchanges heat by natural convection, after the cold energy is transmitted into the drawer 104 through the heat exchange surface 108 at the top, the air at the upper part has low temperature and high density, can naturally settle to form convection, and has higher efficiency.

In some embodiments, at least a portion of the heat exchange surface 108 is made of a metallic material. The refrigeration shell 101 is generally made of materials with poor heat transfer performance, such as EPS (Expanded Polystyrene foam)/EPP (Expanded polypropylene ethylene Expanded polypropylene)/polyurethane; the drawer 104 is generally made of plastic (commonly used PP (polypropylene)/PS (Polystyrene)/ABS (Acrylonitrile Butadiene Styrene copolymer), etc.), and has a slightly high heat transfer performance, while the metal material has a higher heat transfer performance. In this embodiment, by selecting a part or all of the heat exchange surface 108 material as the metal material, the heat transfer performance and the heat transfer efficiency can be effectively improved, so that the cooling speed in the accommodating space 301 is faster, and a faster temperature adjustment effect is achieved. It will be appreciated that in some embodiments, the portion of the refrigeration shell 101 that contacts the crisper 102 may also be made of a metal material to further improve the heat transfer efficiency.

In some embodiments, the heat exchange surface 108 is corrugated. By providing the heat exchange surface 108 in a corrugated shape, the effective contact area can be increased, and the heat exchange efficiency can be improved. It will be appreciated that in some embodiments, the heat exchange surface 108 may be configured with other concave-convex structures to also achieve the effect of increasing the effective contact area and improving the heat exchange efficiency.

In some embodiments, a groove is provided on a side of the refrigeration shell 101 facing the crisper body 102, and the groove and the heat exchange surface 108 form a refrigeration air duct 302. That is, one side of the refrigeration housing 101 is an opening structure, for example, the bottom side of the refrigeration housing 101 shown in fig. 3 is an opening structure, and there is no bottom wall, and the refrigeration housing 101 and the fresh-keeping box body 102 together form a refrigeration air duct 302. The heat exchange surface 108 of the fresh-keeping box body 102 is the bottom of the cooling air duct 302, and the groove is the upper part of the cooling air duct 302. Like this, form into refrigeration wind channel 302 between the surface of preservation box body 102 and the refrigeration casing 101, the direct wall to preservation box body 102 of air conditioning accessible refrigeration wind channel 302 is cooled down, directly follows the heat-exchange surface 108 of refrigeration wind channel 302 to preservation box body 102 promptly, and the centre does not have the separation of refrigeration casing 101, has shortened heat exchange distance, so realizes the quick regulation and control to accommodating space 301 temperature. It is understood that in some embodiments, a groove may be formed on one side of the crisper box 102, and the groove and the wall of the refrigeration shell 101 form the refrigeration duct 302.

In some embodiments, referring to fig. 2 and 4, the cooling air duct 302 includes an air inlet 201 and an air return 202, and the air inlet 201 and the air return 202 are located on the same side of the cooling housing 101. It is understood that in some embodiments, the air inlet 201 and the air return 202 may be disposed on different sides of the refrigeration shell 101. The air inlet 201 and the air return port 202 are located on the same side of the refrigeration shell 101, and the air inlet direction and the air return direction have a difference of 180 degrees, so that cold air can stay in the refrigeration air duct 302 for a longer time, the cold air flows out of the refrigeration air duct 302 after sufficient heat exchange is realized, and the utilization rate is improved.

In some embodiments, referring to FIG. 4, a partition 401 is disposed in the cooling air duct 302, and the partition 401 is located between the intake opening 201 and the return opening 202. Baffle 401 extends to nearly the opposite side from the one side that is provided with air intake 201 of refrigeration casing 101, so can guide the cold wind that gets into from air intake 201 to the opposite side of air intake 201, then turns back one side of air intake 201 again, goes out from return air inlet 202, has effectively prolonged the flow distance of cold wind for cold wind flows out cooling air duct 302 again after realizing abundant heat exchange, improves heat exchange efficiency.

In some embodiments, referring to fig. 4, the air inlet 201 may also be configured as a bell-mouth structure, which facilitates the rapid diffusion of cold air into the whole cooling air duct 302, makes full use of the space of the cooling air duct 302, increases the contact area for effective heat exchange, and improves the heat exchange efficiency.

In some embodiments, referring to fig. 4, the partition 401 divides the cooling air duct 302 into two parts, namely an air inlet channel and an air return channel, wherein the ratio of the air inlet channel is greater than that of the air return channel, so that the cold air flows slowly in the air inlet channel to achieve sufficient heat exchange, and flows quickly in the air return channel to discharge the cold air subjected to heat exchange out of the cooling air duct 302 quickly, thereby improving the heat exchange efficiency.

The refrigerator according to the second aspect of the present invention has a refrigerating compartment and a refrigerating air duct (not shown in the figure), the refrigerating air duct is communicated with the refrigerating compartment, and the refrigerating air duct has an air outlet (not shown in the figure); the refrigerator further comprises the fresh keeping device 100 in the embodiment of the invention, and the fresh keeping device is arranged in the refrigerating chamber, wherein the refrigerating air duct 302 is communicated with the air outlet. Thereby directly utilizing the refrigerating duct to cool the accommodating space 107.

It should be noted that the temperature of the refrigerating compartment of the refrigerator is most suitable for the preservation of fruit and vegetable food, and generally speaking, the reserved space is large and suitable for the placement of the preservation device 100.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. Fresh-keeping device for refrigerator, its characterized in that includes:

the fresh-keeping box body is provided with an accommodating space and an opening communicated with the accommodating space;

the refrigeration shell is arranged on the outer side of the preservation box body and provided with a refrigeration air channel, the refrigeration air channel is used for refrigerating the accommodating space, and the refrigeration shell is provided with a first heat preservation layer;

the drawer can enter and be contained in the containing space through the opening so as to form a closed containing space by matching with the preservation box body.

2. The fresh-keeping device of claim 1, further comprising a heat-insulating housing, wherein an installation space for accommodating the fresh-keeping box body is formed between the heat-insulating housing and the refrigeration housing, and the heat-insulating housing is provided with a second heat-insulating layer.

3. The freshness-preserving device according to claim 1, wherein the freshness-preserving box body includes a heat exchange surface in heat transfer with the refrigeration duct, at least a portion of the heat exchange surface being made of a metallic material.

4. The refreshing apparatus according to claim 1, wherein the refreshing cartridge body includes a heat exchange surface in heat transfer communication with the cooling air duct, the heat exchange surface being corrugated.

5. The freshness-preserving device according to claim 1, wherein the freshness-preserving box body includes a heat exchange surface in heat transfer with the cooling air duct, the heat exchange surface being located at a top of the accommodating space.

6. Fresh-keeping device according to claim 1, characterized in that an oxygen regulating device is connected to the receiving space for regulating the oxygen content in the receiving space.

7. The crisper device of claim 1, wherein the refrigerated air duct is defined by walls of the refrigerated housing and the crisper box.

8. The freshness device according to claim 1, wherein the refrigeration housing is provided with an air inlet and an air return which are communicated with the refrigeration air duct, and the air inlet and the air return are located on the same side of the refrigeration housing.

9. The fresh-keeping device of claim 8 wherein a partition is disposed within the refrigeration housing between the air inlet and the air return, the partition separating the refrigeration air path into an air inlet path and an air return path.

10. A refrigerator, characterized by comprising:

a refrigerated compartment;

the refrigerating air duct is communicated with the refrigerating compartment and is provided with an air outlet;

the preservation apparatus defined in any one of claims 1 to 9 disposed in the refrigerated compartment wherein the refrigerated air duct is in communication with the air outlet.