Fresh-keeping device, refrigerating appliance and fresh-keeping control method

Abstract

The invention provides a fresh-keeping device, a refrigeration appliance and a fresh-keeping control method.The fresh-keeping device is installed in a freezing chamber of the refrigeration appliance and comprises a fresh-keeping box with a box cover arranged on one side, a nitrite sensor installed in the fresh-keeping box and used for collecting the nitrite concentration, and a controller, and the first slow-release module can release slow-release substances into the preservation box from the air opening in the side surface of the preservation box to inhibit the generation of the nitrous acid amine. The independent food preservation box is arranged in the freezing chamber of the refrigeration appliance, generation of cancerogen N-nitrosamine is prevented from being affected by too high temperature of the refrigerating chamber or rotten acidic substances, in the environment with the relatively low freezing chamber, a nitrosamine inhibition mechanism is formed by combining release of natural extraction substances of the slow release module, and the food preservation effect is improved. And the safety of food storage is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration and fresh-keeping, and in particular to a fresh-keeping device, a refrigeration appliance and a fresh-keeping control method. Background Art

[0002] Food preservation technology is an important guarantee for food safety and quality. With the continuous improvement of living standards, users' food purchases have increased, and storage requirements have also increased accordingly. Therefore, extending the shelf life is of great significance for food safety, reducing food waste and improving resource utilization.

[0003] The common way to preserve meat or vegetables is to pickle them, and nitrite is commonly found in food pickling preparations, which can improve the color, taste and texture of food. Relevant studies have shown that nitrite can easily react with sulfhydryl groups, amino acids, reducing peptides, pigments, chloride ions, etc. under certain environments (pH value, microbial flora, temperature, etc.) to generate various nitrogen-containing substances. In an acidic environment, nitrite will form a strong carcinogen - N-nitrosamine, which is a chemical substance with carcinogenicity, teratogenicity and embryotoxicity, and seriously threatens human health.

[0004] At present, the common preservation method for food and its preserved products is to wrap them in vacuum compression bags or fresh-keeping bags and put them in the refrigerator. However, this method cannot control the content of N-nitrosamines in the food. As important appliances for preserving household food, household refrigeration appliances (such as refrigerators, freezers, etc.) also need to increase the function of inhibiting the generation of N-nitrosamines. Summary of the invention

[0005] In order to solve the technical problem that the household refrigeration appliances in the prior art lack the function of inhibiting the generation of N-nitrosamines, the present invention provides a fresh-keeping device, a refrigeration appliance and a fresh-keeping control method.

[0006] The technical solution adopted by the present invention is:

[0007] The present invention proposes a fresh-keeping device, which is installed in the freezer compartment of a refrigeration appliance and comprises: a fresh-keeping box with a box cover on one side, a nitrite sensor installed in the fresh-keeping box for collecting nitrite concentration, and a first slow-release module that can release a slow-release substance from an air vent on the side of the fresh-keeping box into the fresh-keeping box to inhibit the generation of nitrosamines.

[0008] Furthermore, a plurality of slow-release channels are arranged in the side wall of the fresh-keeping box, one end of the plurality of slow-release channels is connected to the air inlet opening located on the outer side of the fresh-keeping box, and the other end is connected to the air outlet opening located on the inner side of the fresh-keeping box, a channel damper is provided at the air outlet opening, and the first slow-release module is arranged in the slow-release channel.

[0009] Furthermore, the plurality of slow-release channels extend radially around the air inlet opening, and each of the slow-release channels corresponds to an air outlet opening. The plurality of air outlet openings are arranged in a ring shape on the inner wall of the fresh-keeping box.

[0010] Furthermore, the first sustained-release module is a thin porous structure arranged along the inner wall of the sustained-release channel and is added with a sustained-release substance.

[0011] Furthermore, a weight sensor for measuring the weight of the items stored in the fresh-keeping box is provided at the bottom of the fresh-keeping box.

[0012] Furthermore, the preservation device also includes: a preservation vertical beam arranged in the freezing chamber, the interior of the preservation vertical beam is hollow and is provided with a second slow-release module; and one end of the preservation vertical beam is provided with an air inlet connected to the interior thereof, and the side is provided with sterilization holes corresponding to various areas of the freezing chamber except the preservation area of ​​the preservation box.

[0013] The present invention also provides a refrigeration appliance, comprising the above-mentioned fresh-keeping device.

[0014] The refrigeration appliance comprises a box body provided with a freezing chamber and a refrigerating chamber, wherein a freezing evaporator is arranged inside the top inner wall of the freezing chamber, a freezing fan assembly covering the freezing evaporator, and a freezing mask covering the freezing fan assembly.

[0015] Furthermore, the freezing mask is provided with a plurality of freezing air doors, vertical beam air doors corresponding to the air inlet of the fresh-keeping vertical beam, and fresh-keeping air doors corresponding to the air inlet opening of the fresh-keeping box. The freezing fan assembly is provided with a fresh-keeping box fan at the position corresponding to the fresh-keeping air door, and a freezer chamber fan is provided at the position corresponding to the freezing air door.

[0016] Furthermore, a freezing partition is vertically arranged in the freezing chamber, and the fresh-keeping vertical beam is arranged along the vertical edge of the freezing partition, and cooperates with the fresh-keeping vertical beam to divide the freezing chamber into multiple areas.

[0017] Furthermore, a partition air inlet facing the fresh-keeping air door is provided on the top of the freezing partition, and a partition air outlet facing the air inlet opening of the fresh-keeping box is provided on the side.

[0018] The present invention also provides a freshness-keeping control method, using the above-mentioned refrigeration appliance, comprising the steps of:

[0019] When the sensor switch of the freezer door and fresh-keeping box of the refrigeration appliance senses the opening signal, and when items are added to the fresh-keeping area of ​​the fresh-keeping box;

[0020] The nitrite concentration N0 in the fresh-keeping box is detected. When the nitrite concentration N0 is greater than the safety threshold concentration Nmax, the fresh-keeping box fan of the refrigeration fan assembly is controlled to increase the speed, and the fresh-keeping damper on the freezing mask and the channel damper on the fresh-keeping box are opened.

[0021] Furthermore, when there are no new items in the fresh-keeping area of ​​the fresh-keeping box, or when the nitrite concentration N0 is less than or equal to the safety threshold concentration Nmax;

[0022] Detect the temperature T of each area of ​​the freezer compartment of the refrigeration appliance, and determine whether the temperature T of each area is greater than the set temperature T set corresponding to each area;

[0023] If the temperature of a certain area is greater than the corresponding set temperature Tset, the damper corresponding to the area is adjusted to change the opening and closing angle of the air outlet according to the difference between the temperature T of the area and the set temperature Tset corresponding to the area, and the fan speed corresponding to the area is increased, and the speed gear of the compressor is increased;

[0024] If the temperature T of each area is less than or equal to the set temperature T set corresponding to each area, the sterilization mode is entered.

[0025] Furthermore, the sterilization mode includes:

[0026] The harmful colony number ψ in each area is collected by setting up harmful colony sensors in each area. If the harmful colony number ψ in any area is greater than the safety concentration threshold parameter ψmax, the opening angle of the air door of the fresh-keeping vertical beam is controlled according to the preset colony range where the harmful colony number ψ is located, and the sterilization hole in the area is opened.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. By setting up a separate food preservation box in the freezer compartment of the refrigeration appliance, it is possible to prevent the acidic substances in the refrigerator from being too high or corrupted and affecting the formation of carcinogenic N-nitrosamines. In the relatively low environment of the freezer compartment, the natural extract substances in the slow-release module are released to form a nitrosamine inhibition mechanism, which effectively improves the safety of food storage. At the same time, the preservation box has a separate temperature control channel, which can set the set temperature value according to the real-time temperature and food classification, which can prevent the food from freezing due to low temperature during storage and affecting the taste, and ensure a beneficial environment for food storage.

[0029] 2. The design of the freezing evaporator and air duct components embedded in the foam layer between the freezer and the refrigerator effectively saves the back space of the freezer and increases the actual usable volume of the refrigeration appliance.

[0030] 3. By optimizing the structure of the freezer air duct components, the dampers and air duct systems are designed separately for the food storage box and each area of ​​the freezer, which is conducive to accurately controlling the temperature of the designated area. When the temperature in a local area of ​​the freezer is too high, the backup air outlet is started to achieve rapid cooling.

[0031] 4. Through the optimization design of the vertical beam, the vertical beam air duct, the inner wall thin-sheet slow-release module and the sterilization hole structure are added, which can realize the effective sterilization of the freezer compartment of the refrigeration appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a three-dimensional structural diagram of the refrigeration appliance in the open door state according to an embodiment of the present invention;

[0034] Figure 2 It is a front view of the refrigeration appliance in the embodiment of the present invention with the door open;

[0035] Figure 3 for Figure 2 AA cross-section diagram;

[0036] Figure 4 for Figure 2 DD cross-section diagram;

[0037] Figure 5 for Figure 2 CC cross-section diagram;

[0038] Figure 6 for Figure 4 BB cross-section diagram;

[0039] Figure 7 It is a three-dimensional structural diagram of the fresh-keeping device in an embodiment of the present invention;

[0040] Figure 8 It is a front view of the fresh-keeping device in the embodiment of the present invention;

[0041] Fig. 9 A top view of a fresh-keeping device in an embodiment of the present invention;

[0042] Fig.10 for Fig. 9 EE cross-section diagram;

[0043] Fig.11 for Fig.10 A partial enlarged view of

[0044] Fig.12 An exploded view of a fresh-keeping device in an embodiment of the present invention;

[0045] Fig.13 It is a three-dimensional structural diagram of the fresh-keeping box body in an embodiment of the present invention;

[0046] Fig.14 It is a front view of the fresh-keeping box body in the embodiment of the present invention;

[0047] Fig.15 for Fig.14 EE cross-section diagram;

[0048] Fig.16 for Fig.14 GG cross-section diagram;

[0049] Fig.17 A top view of a fresh-keeping box body in an embodiment of the present invention;

[0050] Fig.18 for Fig.17 FF cross-section diagram;

[0051] Fig.19 for Fig.18 A partial enlarged view of

[0052] Fig. 20 is a flow chart in an embodiment of the present invention;

[0053] 1. Box body; 4. Freezer door; 5. Fresh-keeping vertical beam; 51. First slow-release module; 52. Sterilization hole; 7. Freezer evaporator; 8. Refrigeration fan assembly; 81. Refrigeration fan; 83. Fresh-keeping fan; 9. Freezer mask; 91. Refrigeration damper; 92. Fresh-keeping damper; 93. Vertical beam damper; 10. Compressor; 11. Fresh-keeping box; 111. Fresh-keeping box cover; 112. Fresh-keeping box sensor switch; 113. Fresh-keeping box air inlet opening; 114. Slow-release channel; 116. Channel damper; 118. Nitrite sensor; 119. Weight sensor; 15. Freezer partition; 151. Partition air outlet; 152. Partition air inlet; 153. Spare air outlet. DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0055] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0056] At present, the common preservation method for food and its preserved products is to wrap them in vacuum compression bags or fresh-keeping bags and put them in the refrigerator. However, this method cannot control the content of N-nitrosamines in the food. As important appliances for preserving household food, household refrigeration appliances (such as refrigerators, freezers, etc.) also need to increase the function of inhibiting the generation of N-nitrosamines.

[0057] For example, the existing patent CN103656714 A deodorizing and sterilizing device and refrigeration equipment only involves the structural description of the sterilizing and deodorizing device and only performs corresponding treatment on microorganisms, but does not perform corresponding control on the concentration of N-nitrosamines in food. The product has a single function and is not combined with the refrigeration system of the refrigeration appliance.

[0058] In this regard, Figures 6 to 11 As shown in Figures 1 and 18, the present invention proposes a fresh-keeping device, which is installed in the freezer compartment of a refrigeration appliance, that is, installed in the freezer compartment of a refrigerator. The fresh-keeping device specifically includes: the structure of the fresh-keeping device includes a fresh-keeping box 11, and the front side of the fresh-keeping box 11 is equipped with an openable box cover, which is convenient for users to operate and store and access food. In the fresh-keeping box 11, a nitrite sensor 118 is provided for real-time monitoring of the nitrite concentration in the fresh-keeping area (that is, in the fresh-keeping box 11). The side of the fresh-keeping box 11 is also provided with an air vent, and a first slow-release module 51 is arranged in conjunction with the air vent. The first slow-release module 51 is added with natural extracts (including but not limited to vitamin C, polyphenols, plant extracts such as ginger, platycodon, orange seeds, apples, etc.), which can be released into the fresh-keeping box 11 with the flow of cold air to effectively inhibit the generation of nitrosamines.

[0059] The built-in nitrite sensor 118 can detect the fresh-keeping environment in real time to ensure the safety of food storage. The first slow-release module 51 can release specific substances into the fresh-keeping box 11, thereby effectively reducing the risk of nitrosamine generation and ensuring the safety and freshness of food.

[0060] Specifically, the nitrite sensor 118 is a current bioelectrochemical sensor, which has the advantages of high selectivity, high sensitivity and low detection limit, and is an ideal analytical tool for quickly and directly obtaining information about the composition of a complex system. Under acidic conditions, nitrite is prone to undergo a disproportionation reaction to generate nitric oxide, so myoglobin (Mb), a redox protein for nitric oxide, is used as a sensor sensitive element, which can indirectly achieve a highly selective and sensitive determination of nitrite.

[0061] like Fig.18 As shown, specifically, the nitrite sensor 118 is arranged on the inner wall on the left side of the fresh-keeping box 11, and the first slow-release module 51 and the air outlet are arranged on the right side of the fresh-keeping box 11. The two are arranged opposite to each other, which is convenient for detection after placing items in the middle.

[0062] like Figures 13 to 19As shown, in a specific embodiment, a plurality of slow-release channels 114 are provided in the side wall of the fresh-keeping box 11. One end of each slow-release channel 114 is connected to an air inlet opening on the outer side of the fresh-keeping box 11, and the other end is connected to an air outlet opening on the inner side of the fresh-keeping box 11. A first slow-release module 51 (forming a porous microsphere slow-release material cavity) is provided in each slow-release channel 114, and the first slow-release module 51 is provided on the inner wall of the slow-release channel 114 and extends along the inner wall of the slow-release channel 114. When the wind entering the fresh-keeping box 11 passes through the slow-release channel 114, it can take away the slow-release material of the first slow-release module 51 on the inner wall of the slow-release channel 114 into the fresh-keeping box 11, and by providing a plurality of slow-release channels 114, the contact area between the air intake and the first slow-release module 51 can be increased.

[0063] In a further embodiment, a plurality of sustained-release channels 114 extend radially around the inner wall of the fresh-keeping box 11 with an air inlet opening as the center, that is, each sustained-release channel 114 is a ray, and the width of the sustained-release channel 114 gradually increases as it extends from the air inlet opening to the air outlet opening, and each sustained-release channel 114 corresponds to an air outlet opening, and the plurality of air outlet openings are located on the inner wall of the fresh-keeping box 11 and arranged in a ring.

[0064] The multiple slow-release channels 114 are designed to extend in all directions with the air inlet opening as the center, so that the air outlet openings can be arranged in a ring shape, which can improve the release efficiency and uniformity of the slow-release substance.

[0065] In a specific embodiment, each air outlet is provided with a channel damper 116 that can be opened and closed individually. By changing the number of channel dampers 116 opened, the contact area between the incoming air and the first slow-release module 51 can be changed, that is, the actual release speed of the first slow-release module 51 can be changed.

[0066] like Fig.11As shown, in a specific embodiment, the first slow-release module 51 is a thin porous structure arranged along the inner wall of the slow-release channel 114 (making the slow-release channel 114 a porous microsphere slow-release material cavity), and a slow-release substance is added. The slow-release substance is a natural extract (including but not limited to vitamin C, polyphenols, ginger, platycodon, orange seeds, apples and other plant extracts, etc.), which can be released into the fresh-keeping box 11 with the flow of cold air to effectively inhibit the generation of nitrosamines; by setting a thin porous structure, the slow-release substance can be stored and the contact with the cold air can be increased, so that the slow-release substance can flow into the fresh-keeping box 11 with the flow of cold air. Among them, natural plant extracts are highly efficient, non-toxic, low-residue natural sustained-release preservatives. The raw materials are harmless, environmentally friendly, low-cost, and highly safe. The gel-like natural extracts are combined with the sustained-release module to slowly release active molecules into the space to remove hydroxyl radicals (-OH), which can significantly inhibit the growth of microorganisms in the fresh-keeping box 11 and the reaction pathway of nitrite to N-nitrosamine, thereby improving the food preservation effect and reducing N-nitrosamine in the food.

[0067] like Fig.18 As shown, in a specific embodiment, a weight sensor 119 for measuring the weight of the storage in the fresh-keeping box 11 is also provided at the bottom of the fresh-keeping box 11 .

[0068] The weight sensor 119 cooperates with the induction switch of the refrigeration appliance and the fresh-keeping box 11. The induction switch can sense whether the freezer door of the refrigeration appliance is open, and whether the lid of the fresh-keeping box 11 is open. The weight sensor 119 can sense the weight change of the items in the fresh-keeping box 11, and determine whether new items are put in by the weight change.

[0069] like Figures 6 to 8 As shown, in a specific embodiment, the preservation device further includes: a preservation vertical beam 5 arranged in the freezer, the preservation vertical beam 5 is hollow inside and is provided with a second slow-release module; the preservation vertical beam 5 is arranged vertically, and the upper end of the preservation vertical beam 5 located on the side of the freezer close to the door is provided with an air inlet connected to the interior thereof, and a plurality of sterilization holes 52 are provided on both sides. Each sterilization hole 52 corresponds to each area of ​​the freezer except the preservation area of ​​the fresh-keeping box 11.

[0070] The second slow-release module inside the fresh-keeping vertical beam 5 is arranged along the hollow inner wall inside the fresh-keeping vertical beam 5. When the cold air enters from the air inlet at the top of the fresh-keeping vertical beam 5 and flows downward, it will contact the hollow inner wall of the fresh-keeping vertical beam 5, that is, contact the second slow-release module, so that the slow-release substance in the second slow-release module can be driven by the cold wind and blown out from the sterilization holes 52 on both sides of the fresh-keeping vertical beam 5.

[0071] In addition, the preservation beam 5 is arranged on a side of the freezer compartment close to the door, which is convenient for disassembly and replacement of the preservation beam 5. When the functionality of the second slow-release module decreases, the refrigeration appliance can regain the sterilization effect by replacing the preservation beam 5.

[0072] Each area of ​​the freezing chamber is also provided with a harmful colony sensor for detecting colonies. By arranging the fresh-keeping vertical beam 5 and cooperating with the harmful colony sensor for detection, sterilization control can be performed on each area separately.

[0073] Specifically, the second slow-release module is a thin sheet porous microsphere structure, which is consistent with the first slow-release module 51. According to the "Research on the Application of Porous Microsphere Slow-Release Technology in Refrigeration Appliances Preservation", porous microsphere slow-release technology refers to combining active substances with slow-release substrates, slowly releasing active substances through the decomposition and diffusion of the slow-release substrates, degradation and dissolution, internal and external pressure difference penetration, etc., which can maintain a certain effective concentration of active substances in the system for a long time. It has the advantages of slow release of active substances, prolonged action time, increased stability, and improved action efficiency. After the natural extracted active substances are combined with the slow-release module, the active molecules are slowly released into the space, which can effectively block and inhibit the formation of carcinogenic N-nitrosamines for a long time, achieve antibacterial and antibacterial, anti-oxidation, and improve the preservation effect.

[0074] like Figures 1 to 6 As shown, the present invention also provides a refrigeration appliance, comprising the above-mentioned fresh-keeping device. The refrigeration appliance can be specifically a refrigerator.

[0075] By setting up a separate food preservation box 11 in the freezer compartment of the refrigeration appliance, it is possible to prevent the acidic substances at excessively high or corrupted temperatures in the refrigerator from affecting the generation of carcinogenic N-nitrosamines. In the relatively low environment of the freezer compartment, the natural extract substances in the slow-release module are released to form a nitrosamine inhibition mechanism, thereby effectively improving the safety of food storage. At the same time, the preservation box 11 has a separate temperature control channel, which can set a set temperature value based on the real-time temperature and food classification, thereby preventing the food from freezing due to excessively low temperatures during storage and affecting the taste, thereby ensuring a beneficial environment for food storage.

[0076] And through the optimization design of the vertical beam, the vertical beam air duct, the inner wall thin-sheet slow-release module and the sterilization hole 52 structure are added, so that the effective sterilization of the freezer compartment of the refrigeration appliance can be achieved.

[0077] Specifically, the refrigeration appliance includes: a box body 1, a compressor 10, a freezing evaporator 7, and a refrigeration evaporator (specifically, the pipe connection between the compressor 10 and the evaporator is a conventional method in the prior art, which is not described in detail), the upper part of the box body 1 is a refrigeration chamber, the lower part is a freezing chamber, and there is a foaming interlayer between the upper and lower parts, and the freezing evaporator 7 is arranged in the interlayer. Specifically, the top inner wall of the freezing chamber is recessed upward to form an installation groove, and the freezing evaporator 7 is installed in the installation groove, and the freezing evaporator 7 is covered and installed with a freezing fan assembly 8 and a freezing mask 9 in sequence below the freezing evaporator 7.

[0078] The design of the freezing evaporator 7 and the air duct assembly embedded in the foaming interlayer between the freezing chamber and the refrigerating chamber effectively saves the back space of the freezing chamber and increases the actual usable volume of the user in the refrigeration appliance.

[0079] Specifically, a freezing damper 91, a vertical beam damper 93 and a fresh-keeping damper 92 are provided on the freezing mask 9. Specifically, a fresh-keeping damper 92 for the air inlet opening of the fresh-keeping box 11 is provided in the middle part of the freezing mask 9. Multiple freezing dampers 91 are arranged around the fresh-keeping damper 92, and air can be directly blown downward to supply cooling to the freezing chamber. A vertical beam damper 93 is provided on the front side of the freezing mask 9. The vertical beam damper 93 is arranged corresponding to the air inlet of the fresh-keeping vertical beam 5. The freezing fan assembly 8 is respectively provided with a fresh-keeping box 11 fan, a freezer chamber fan and a vertical beam fan corresponding to the position of each damper.

[0080] By arranging a plurality of air doors on the freezing mask 9, air can be supplied to the fresh-keeping vertical beam 5 and the fresh-keeping box 11 separately, so that the fresh-keeping box 11 can prevent the corrupted acidic substances from affecting the generation of carcinogen N-nitrosamine through the first slow-release module 51 when necessary. It is also conducive to accurately controlling the temperature of the designated area and achieving rapid cooling.

[0081] Specifically, a freezing partition 15 is vertically arranged in the freezing chamber, and a fresh-keeping vertical beam 5 is arranged along the vertical front edge of the freezing partition 15, and cooperates with the fresh-keeping vertical beam 5 to divide the freezing chamber into multiple areas. Each area is provided with a temperature sensor to detect the temperature, and a harmful colony sensor is provided to detect the number of harmful colonies ψ, so that the temperature of each area can be controlled separately. The side of the fresh-keeping vertical beam 5 is provided with sterilization holes 52 corresponding to each area of ​​the freezing chamber except the fresh-keeping area of ​​the fresh-keeping box 11, and each area can be sterilized through the fresh-keeping vertical beam 5.

[0082] That is, by cooperating with the freezing partition 15 and the preservation vertical beam 5 , the freezing chamber has a plurality of areas for storing articles separately, and each area can be sterilized by the preservation vertical beam 5 .

[0083] The top of the freezing partition 15 is provided with a partition air inlet 152 facing the fresh-keeping air door 92, and the side is provided with a partition air outlet 151 facing the air inlet opening of the fresh-keeping box 11. That is, the freezing partition 15 not only serves as a partition, but also has an air duct inside, which can conduct the cold air blown out by the fresh-keeping air door 92 to the side of the fresh-keeping box 11.

[0084] In addition, if Figure 7 As shown, a spare air outlet 153 is also provided on the freezing partition 15 for blowing air to other areas of the freezing chamber for cooling. When the temperature in other areas is high, the spare air outlet 153 can be opened to increase the cooling supply.

[0085] like Fig. 20As shown, the present invention also proposes a preservation control method, using the above-mentioned refrigeration appliance, which specifically includes the steps of:

[0086] When the sensor switch of the freezer door and fresh-keeping box of the refrigeration appliance senses the opening signal, and when items are added to the fresh-keeping area of ​​the fresh-keeping box;

[0087] Detect the nitrite concentration N0 in the fresh-keeping box. When the nitrite concentration N0 is greater than the safety threshold concentration N max When the refrigerator is cooled, the fresh-keeping box fan of the refrigeration fan assembly is controlled to increase the speed, and the fresh-keeping air door on the freezing mask and the channel air door on the fresh-keeping box are opened, as well as the corresponding air outlets on the partition.

[0088] That is, when adding items to the fresh-keeping area, if the nitrite concentration N0 in the fresh-keeping box is too high, the fresh-keeping box fan of the refrigeration fan assembly is turned on, so that the slow-release substance of the first slow-release module is released into the fresh-keeping box with the cold air to inhibit the formation of nitrosamines.

[0089] And, the first slow-release module releases for a certain period of time (t 0设 ), that is, timer t0 = t 0设 . Return to the step of detecting the nitrite concentration N0 in the fresh-keeping box.

[0090] The signal control of newly added items in the fresh-keeping area of ​​the fresh-keeping box is as follows:

[0091] When the signals that the freezer door of the refrigeration appliance and the fresh-keeping box induction switch sensors are both turned on are fed back to the controller, the controller generates a signal S1 (i.e., the damper fan corresponding to the first slow-release module of the fresh-keeping box is ready to start), and the weight sensor set at the bottom of the fresh-keeping box starts to collect initial weight data G0 as a reference value. When the signals that the freezer door of the refrigeration appliance and the fresh-keeping box induction switch are both closed are fed back to the controller, the weight sensor of the fresh-keeping box collects weight data G1 again. If G1>G0, it means that new items have been added to the fresh-keeping area, and the controller generates a signal S2 (the damper fan corresponding to the first slow-release module of the fresh-keeping box starts working), and the counter is reset at the same time. On the contrary, if G1≤G0, it means that there is no change in the items in the fresh-keeping box or the items have been taken out, and the controller generates a signal S 2-0 , the first slow-release module is switched to the closed state and directly enters the temperature acquisition program.

[0092] When the system generates the signal S2, the step of detecting the nitrite concentration N0 in the fresh-keeping box is started.

[0093] Fresh box fan speed C N0 The gear level is determined by the detected nitrite concentration N0 and the safety threshold concentration. Nmax The difference N is determined as shown in the following table:

[0094]

[0095] In a specific embodiment, when there is no new item in the fresh-keeping area of ​​the fresh-keeping box, or when the nitrite concentration N0 is less than or equal to the safety threshold concentration N max hour;

[0096] Detect the temperature T of each area of ​​the freezer compartment of the refrigeration appliance, and determine whether the temperature T of each area is greater than the set temperature T corresponding to each area 设 ;

[0097] If the temperature of a certain area is greater than its corresponding set temperature T 设 , according to the temperature T of the area and the set temperature T corresponding to the area 设 The difference T0 and food classification parameters are used to adjust the damper corresponding to the area, change the opening and closing angle of the air outlet, increase the fan speed corresponding to the area, and increase the speed gear of the compressor;

[0098] If the temperature T of each area is less than or equal to the set temperature T of each area 设 , it enters sterilization mode.

[0099] That is, by detecting the temperature of each area individually, the temperature of each area can be controlled independently, so that the freezer can have multiple storage areas with different temperatures, improving the flexibility of storing items in the freezer. At the same time, the damper, fan and compressor speed are controlled separately for each area, which can further improve the temperature control efficiency.

[0100] Specifically, according to the temperature T of the area and the set temperature T corresponding to the area 设 The difference and food classification parameters (the food classification parameters may not be used, and the adjustment may be made directly according to the difference, the larger the difference, the larger the tuyere angle) adjust the tuyere corresponding to the area to change the tuyere opening and closing angle. Specifically: for example, if the food classification parameter of the area is meat food, and the temperature difference T0 is large, the tuyere can be opened to the maximum angle for rapid freezing. For example, if the food classification parameter of the area is quick-frozen food, and the temperature difference T0 is large, the tuyere opening angle can be adjusted to the middle opening for freezing.

[0101] The specific embodiments are as follows:

[0102] When the nitrite concentration N0 in the fresh-keeping box is lower than the threshold concentration, the temperature detected by the temperature sensors in each area is divided into T S0 , T S1 , T S2 ···T Sn .

[0103] Where T S0 is the temperature parameter collected by the food preservation box temperature sensor, T S1 ~TSn is the temperature parameter collected by the temperature sensors in each area of ​​the freezer except the fresh-keeping box, and n is the number of temperature sensors other than the fresh-keeping box in the freezer.

[0104] When the temperature of each zone is lower than the corresponding set value (T SX设 When the temperature of a certain area is higher than the set temperature, the air outlet in that area will adjust the opening angle, the fan speed will be increased, the compressor speed will be increased, and when the temperature is too high, the spare air outlet in the partition will be activated.

[0105] The fan and compressor speed increase rules are shown in the following figure (where X is the serial number of the area):

[0106]

[0107] Specifically, the sterilization modes include:

[0108] The harmful colony sensors set in each area collect the number of harmful colonies in each area ψ. If the number of harmful colonies ψ in any area is greater than the safety concentration threshold parameter ψ max , according to the preset colony range where the number of harmful colonies ψ is located, the opening angle of the air door of the fresh-keeping vertical beam is controlled, and the sterilization holes in the area are opened.

[0109] By optimizing the design of vertical beams, increasing vertical beam air ducts, and detecting the number of harmful bacteria colonies in each area, effective sterilization of the freezer compartment of refrigeration appliances can be achieved, improving the storage environment of the freezer compartment, that is, improving the preservation effect of stored goods.

[0110] Specifically, the larger the number of harmful colonies ψ is, the larger the opening angle of the air door of the preservation beam is, and the more slow-release substances are released. The specific table is as follows, where Y is the serial number of the area (m in the flow chart is the number of colony sensors, and the number corresponds to Y one by one), and there are 5 preset colony ranges:

[0111]

[0112] The specific control is to judge the number of harmful colonies ψ in each area, and control the opening angle of the damper according to the range of the number of harmful colonies ψ.

[0113] In addition, when the counter t0 = t 设 , t 设 The parameter measurement cycle is set to the preset value, that is, when the counter t0 = t 设 Then return to the step of detecting the nitrite concentration.

[0114] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0115] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0116] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0117] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0118] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0119] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fresh-keeping device, characterized in that: The fresh-keeping device is installed in the freezer compartment of the refrigeration appliance, and includes: a fresh-keeping box with a box cover on one side, a nitrite sensor installed in the fresh-keeping box to collect nitrite concentration, and a first slow-release module that can release slow-release substances from the air vent on the side of the fresh-keeping box into the fresh-keeping box to inhibit the generation of nitrosamines.

2. The fresh-keeping device according to claim 1, characterized in that: A plurality of slow-release channels are arranged in the side wall of the fresh-keeping box, one end of the plurality of slow-release channels is connected to the air inlet opening located on the outer side of the fresh-keeping box, and the other end is connected to the air outlet opening located on the inner side of the fresh-keeping box, a channel damper is arranged at the air outlet opening, and the first slow-release module is arranged in the slow-release channel.

3. The fresh-keeping device according to claim 2, characterized in that: The plurality of slow-release channels extend radially around the air inlet opening, and each of the slow-release channels corresponds to an air outlet opening. The plurality of air outlet openings are arranged in a ring shape on the inner wall of the fresh-keeping box.

4. The fresh-keeping device according to claim 2 or 3, characterized in that: The first sustained-release module is a thin porous structure arranged along the inner wall of the sustained-release channel and is added with a sustained-release substance.

5. The fresh-keeping device according to claim 1, characterized in that: A weight sensor for measuring the weight of the items stored in the fresh-keeping box is also provided at the bottom of the fresh-keeping box.

6. The fresh-keeping device according to claim 1, characterized in that: The fresh-keeping device also includes: a fresh-keeping vertical beam arranged in the freezing chamber, the interior of the fresh-keeping vertical beam is hollow and is provided with a second slow-release module; and one end of the fresh-keeping vertical beam is provided with an air inlet connected to the interior thereof, and the side is provided with sterilization holes corresponding to various areas of the freezing chamber except the fresh-keeping area of ​​the fresh-keeping box.

7. A refrigeration appliance, characterized in that: It comprises the fresh-keeping device as described in any one of claims 1 to 6.

8. The refrigeration appliance according to claim 7, characterized in that: The utility model comprises a box body provided with a freezing chamber and a refrigerating chamber, wherein a freezing evaporator is arranged in the top inner wall of the freezing chamber, a freezing fan assembly covering the freezing evaporator, and a freezing mask covering the freezing fan assembly.

9. The refrigeration appliance according to claim 8, characterized in that: The freezing mask is provided with a plurality of freezing air doors, vertical beam air doors corresponding to the air inlet of the fresh-keeping vertical beam, and fresh-keeping air doors corresponding to the air inlet opening of the fresh-keeping box. The freezing fan assembly is provided with a fresh-keeping box fan at the position corresponding to the fresh-keeping air door, and a freezer chamber fan is provided at the position corresponding to the freezing air door.

10. The refrigeration appliance according to claim 9, characterized in that: A freezing partition is also vertically arranged in the freezing chamber, and the fresh-keeping vertical beam is arranged along the vertical edge of the freezing partition, and cooperates with the fresh-keeping vertical beam to divide the freezing chamber into multiple areas.

11. The refrigeration appliance according to claim 10, characterized in that: The top of the freezing partition is provided with a partition air inlet facing the fresh-keeping air door, and the side is provided with a partition air outlet facing the air inlet opening of the fresh-keeping box.

12. A method for controlling freshness preservation, characterized in that: Using the refrigeration appliance according to any one of claims 7 to 11 comprises the steps of: When the sensor switch of the freezer door and fresh-keeping box of the refrigeration appliance senses the opening signal, and when items are added to the fresh-keeping area of ​​the fresh-keeping box; Detect the nitrite concentration N0 in the fresh-keeping box. When the nitrite concentration N0 is greater than the safety threshold concentration N max When the fresh-keeping box fan of the refrigeration fan assembly is controlled to increase the speed, and the fresh-keeping air door on the freezing mask and the channel air door on the fresh-keeping box are opened.

13. The freshness-keeping control method according to claim 12, characterized in that: When there are no new items in the fresh-keeping area of ​​the fresh-keeping box, or when the nitrite concentration N0 is less than or equal to the safety threshold concentration N max hour, Detect the temperature T of each area of ​​the freezer compartment of the refrigeration appliance, and determine whether the temperature T of each area is greater than the set temperature T corresponding to each area 设 ; If the temperature of a certain area is greater than its corresponding set temperature T 设 , according to the temperature T of the area and the set temperature T corresponding to the area 设 The difference is used to adjust the damper corresponding to the area, change the opening and closing angle of the air outlet, increase the fan speed corresponding to the area, and increase the speed gear of the compressor; If the temperature T of each area is less than or equal to the set temperature T of each area 设 , it enters sterilization mode.

14. The freshness-keeping control method according to claim 12, characterized in that: The sterilization mode includes: The harmful colony sensors set in each area collect the number of harmful colonies in each area ψ. If the number of harmful colonies ψ in any area is greater than the safety concentration threshold parameter ψ max , according to the preset colony range where the number of harmful colonies ψ is located, the opening angle of the air door of the fresh-keeping vertical beam is controlled, and the sterilization holes in the area are opened.

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