WO2021190005A1 - 保鲜装置及冰箱 - Google Patents

保鲜装置及冰箱 Download PDF

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Publication number
WO2021190005A1
WO2021190005A1 PCT/CN2020/138705 CN2020138705W WO2021190005A1 WO 2021190005 A1 WO2021190005 A1 WO 2021190005A1 CN 2020138705 W CN2020138705 W CN 2020138705W WO 2021190005 A1 WO2021190005 A1 WO 2021190005A1
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WO
WIPO (PCT)
Prior art keywords
fresh
cylinder
keeping
keeping device
air
Prior art date
Application number
PCT/CN2020/138705
Other languages
English (en)
French (fr)
Inventor
任相华
周新
唐学强
Original Assignee
合肥美的电冰箱有限公司
合肥华凌股份有限公司
美的集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US17/798,881 priority Critical patent/US20230103443A1/en
Application filed by 合肥美的电冰箱有限公司, 合肥华凌股份有限公司, 美的集团股份有限公司 filed Critical 合肥美的电冰箱有限公司
Priority to EP20927243.4A priority patent/EP4105581A4/en
Priority to JP2022545437A priority patent/JP7418593B2/ja
Publication of WO2021190005A1 publication Critical patent/WO2021190005A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
    • A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23B7/148—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
    • A23L3/3409—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23L3/3418—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/061—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation through special compartments

Definitions

  • the invention belongs to the field of refrigeration storage equipment, and more specifically, relates to a fresh-keeping device and a refrigerator.
  • the present invention aims to solve one of the above technical problems at least to a certain extent. For this reason, the present invention proposes a fresh-keeping device with a high oxygen reduction rate that can be used in refrigerators.
  • the fresh-keeping device for a refrigerator includes: a fresh-keeping box body having a lower frame and an upper frame, the lower frame is provided with an accommodating space, and is provided with an opening communicating with the accommodating space and Air inlet, the upper frame is provided with a refrigerating air duct, the refrigerating air duct is used to cool the accommodating space; the drawer can enter through the opening and be accommodated in the accommodating space, so as to maintain the freshness
  • the box body cooperates to form a closed containment space; a nitrogen generating device is connected to the side of the fresh-keeping box body where the air inlet is arranged, and the generated nitrogen gas can be filled into the containing space through the air inlet .
  • the fresh-keeping device has at least the following beneficial effects: a drawer-type structure is adopted, and the drawer and the box body cooperate to form a closed storage space, which can ensure that the nitrogen gas is filled into the storage space, and the oxygen is quickly reduced. Concentration; The refrigerating air duct is provided on the preservation box body, which can improve the refrigeration effect of the storage space, and the good oxygen reduction effect and refrigeration capacity make the preservation effect of fruits and vegetables improved.
  • the fresh-keeping device further includes: a first one-way valve arranged on the lower frame or the drawer, so that the gas in the containing space can be discharged to the outside of the fresh-keeping device , And at the same time prevent outside oxygen-rich gas from entering the containment space.
  • the nitrogen generating device includes: a housing provided with an air outlet for connecting the air inlet; a vacuum pump having a pump air inlet pipe and a pump air outlet pipe; an adsorption cylinder with an oxygen adsorber arranged inside
  • the adsorption cylinder has a cylinder inlet pipe and a cylinder outlet pipe, the cylinder inlet pipe is connected to the pump inlet pipe and the pump outlet pipe at the same time, and the cylinder inlet pipe is connected with the pump inlet pipe.
  • a three-way valve, a second three-way valve is connected between the cylinder inlet pipe and the pump outlet pipe; a nitrogen storage tank with a tank inlet pipe and a tank outlet pipe, the tank inlet pipe and the cylinder outlet pipe Connected, the tank gas outlet pipe is connected to the gas outlet.
  • the vacuum pump, the adsorption cylinder, and the nitrogen storage tank are coplanarly arranged in the housing.
  • a first one-way valve is provided between the cylinder air outlet pipe and the tank air inlet pipe, and a second one-way valve is provided between the air outlet and the tank air outlet pipe.
  • the air inlet is formed with an inner hole cylinder
  • the air outlet is formed with a groove matching the inner hole cylinder
  • a groove is provided between the groove and the inner hole cylinder. Seal ring.
  • a sealing strip is provided between the opening and the drawer to ensure the tightness between the opening and the drawer.
  • a cold air inlet is opened on one side wall of the upper frame, and a cold air outlet is opened on the opposite side wall.
  • the cold air inlet and the cold air outlet are both connected to the refrigeration system.
  • the air duct is connected.
  • the drawer includes an end cover, and the upper frame protrudes from the lower frame, so that the fresh-keeping box body forms a recess on one side of the opening, and at least part of the end cover Placed in the recess.
  • a refrigerator includes: a refrigerating compartment; a refrigerating air duct communicating with the refrigerating compartment, the refrigerating air duct having an air outlet; the fresh-keeping device according to claims 1-9, In the refrigerating compartment, wherein the refrigerating air duct is in communication with the air outlet.
  • the refrigerator according to the embodiment of the present invention has at least the following beneficial effects: an independent fresh-keeping device is installed in the refrigerating compartment of the refrigerator, which increases the use of the refrigerator without opening the refrigerator.
  • the door affects the preservation environment of the containment space.
  • Figure 1 is a three-dimensional exploded schematic view of the fresh-keeping device of an embodiment of the present invention
  • Figure 2 is a left side view of the fresh-keeping device of the embodiment of the present invention.
  • FIG. 3 is an A-A cross-sectional view of the fresh-keeping device of the embodiment of the present invention shown in FIG. 2;
  • FIG. 4 is a schematic diagram of the internal structure of the nitrogen generating device of the fresh-keeping device of the embodiment of the present invention.
  • FIG. 5 is a plan view of the nitrogen generating device of the fresh-keeping device of the embodiment of the present invention.
  • FIG. 6 is an enlarged view of the structure at B of the nitrogen generating device of the fresh-keeping device of the embodiment of the present invention.
  • Fig. 7 is a schematic diagram of the nitrogen production process of the nitrogen generator of the fresh-keeping device of the embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the analysis process of the nitrogen generating device of the fresh-keeping device according to the embodiment of the present invention.
  • Fig. 9 is a schematic diagram of a three-dimensional structure of a refrigerator according to an embodiment of the present invention.
  • Vacuum pump 401 pump inlet pipe 402; first three-way valve 403; second three-way valve 404; cylinder inlet pipe 405; pump outlet pipe 406; tank inlet pipe 407; tank outlet pipe 408; cylinder outlet pipe 409; To the valve 410; the second one-way valve 411;
  • Refrigerator 900 refrigerated compartment 901.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
  • the features defined with “first” and “second” may explicitly or implicitly include one or more features.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a movable connection, or a detachable connection or a non-detachable connection. , Or integrally connected; it can be mechanically connected, it can be electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components, indirect communication or the connection of two components Interaction relationship.
  • the fresh-keeping device 100 is used in a refrigerator 900.
  • the refrigerator 900 can refer to a broad sense of refrigeration storage equipment, such as refrigerators, electric freezers, and refrigerators.
  • a fresh-keeping device 100 includes a fresh-keeping box body 101, including an upper frame 102 and a lower frame 103, the lower frame 103 is provided with a receiving space, and one side of the lower frame 103 is provided with The opening 111 communicating with the accommodating space is provided with an air inlet 601 communicating with the accommodating space on the other side opposite to the opening 111, and the upper frame 102 is provided with a cooling air duct 301 for cooling the accommodating space; the drawer 104 can pass through The opening 111 enters and is accommodated in the accommodating space to form a sealed accommodating space 308 in cooperation with the fresh-keeping box body 101; the nitrogen generator 105 is connected to the side of the fresh-keeping box body 101 where the air inlet 601 is provided, that is, the fresh-keeping box body On the rear side of 101, the generated nitrogen gas can be charged into the containing space 308 through the air inlet 601. It should be noted that the air inlet 601 can also be arranged on other sides, which needs to be specifically
  • the lower frame 103 itself should form a closed structure except for the opening 111 and the air inlet 601, and the upper frame
  • the cooling air duct 301 of the frame 102 and the accommodation space of the lower frame 103 should be isolated.
  • cold air enters the cooling air duct 301 from the cold air inlet 201, and then is discharged from the cold air outlet 306 to form a cold air flow 304, so that the cooling air duct 301 exchanges heat with the accommodation space. Lower the temperature of the containing space.
  • the nitrogen generated by the nitrogen generating device 105 enters the containing space 308 through the air inlet 601 (see FIG. 6 ), thereby forming a nitrogen flow 305.
  • the spacer between the upper frame 102 and the lower frame 103 selects materials with good heat transfer efficiency, such as metal.
  • the nitrogen generator 105 uses the PSA nitrogen production method to remove oxygen from the air (cold air in the refrigerator 900 in this embodiment) to generate pure nitrogen, and then inject the nitrogen into the containing space 308 In order to achieve the purpose of keeping fruits and vegetables fresh.
  • Pressure swing adsorption is currently a mainstream technology for gas production.
  • Pressure swing adsorption specifically refers to pressurizing the mixed gas under the condition of constant temperature, and using adsorbents to adsorb excess impurity gas. Obtain a relatively pure single gas, and then use a reduced pressure or normal pressure method to desorb the impurity gas in the adsorbent to reuse the adsorbent.
  • Oxygen adsorbents are currently commonly used adsorbents to achieve separation of oxygen and nitrogen and extract nitrogen from the air.
  • the adsorption pressure is the same, the adsorption capacity of oxygen adsorbents for oxygen is much higher than the adsorption capacity for nitrogen.
  • the PSA nitrogen production method uses this principle, uses air as a raw material, uses pressure swing adsorption technology, and uses oxygen adsorbents to selectively adsorb oxygen and nitrogen to achieve the separation of nitrogen and oxygen in the air, thereby producing pure nitrogen.
  • the fresh-keeping device 100 can be placed in a low temperature environment as a whole as required, or the refrigerating air duct 301 of the fresh-keeping apparatus 100 can be directly connected to the air duct of an existing refrigeration equipment to realize rapid cooling of the containing space.
  • the lower frame 103 is provided with a guide rail 110.
  • the bottom of the drawer 104 is also provided with a guiding mechanism (not shown in the figure) matched with the guide rail 110.
  • the fresh-keeping device 100 in order to supply power to the fresh-keeping device 100, the fresh-keeping device 100 must be electrically connected to the power source when in use. In order to control the fresh-keeping device 100, the fresh-keeping device 100 must have its own controller or be connected to the outside world. To connect to the controller.
  • the fresh-keeping device 100 has at least the following beneficial effects: the drawer 104-type structure can be easily opened and sealed; the drawer 104 and the fuse box 101 cooperate to form a closed storage space 308, which can ensure the nitrogen generating device The nitrogen generated by 105 is quickly filled into the containing space 308. As the pressure increases, the oxygen-enriched gas in the containing space 308 is squeezed out of the containing space 308. Due to the principle of gas diffusion, the gas flows naturally from a place with a high concentration to a place with a low concentration.
  • the nitrogen concentration in the drawer 104 can be increased to the set value (that is, the oxygen concentration can be reduced to the set value), and the concentration can be kept uniform; and the refrigerating air duct 301 is provided on the fresh-keeping box body 101,
  • the refrigeration effect of the containing space 308 can be improved, and the good oxygen-reducing effect and refrigeration capacity can improve the fresh-keeping effect of food (ie vegetables, fruits, etc.).
  • the fresh-keeping box body 101 and the nitrogen generating device 105 as an integral structure, the volume of the fresh-keeping device 100 can be greatly reduced, and it can be used in the refrigerator 900 as a modular structure, making the application of the fresh-keeping device 100 more flexible.
  • the fresh-keeping device 100 further includes a one-way valve (not shown in the figure), which is arranged on the lower frame 103 or the drawer 104 so that the gas in the storage space 308 can be discharged to the outside of the fresh-keeping device 100.
  • a one-way valve (not shown in the figure), which is arranged on the lower frame 103 or the drawer 104 so that the gas in the storage space 308 can be discharged to the outside of the fresh-keeping device 100.
  • the purpose is: when the nitrogen generated by the nitrogen generator 105 enters the containing space 308, as the pressure increases, the gas in the containing space 308 can be discharged out of the containing space 308 through the one-way valve, while preventing The outside air enters the containing space 308 through the one-way valve, so that the nitrogen concentration in the containing space 308 increases and the oxygen concentration decreases, so as to provide a low-oxygen environment.
  • the one-way valve when the one-way valve is arranged on the drawer 104, it can be arranged on the outside of the drawer 104, that is, on the end cover 109, so that the gas in the receiving space 308 can be easily discharged to the outside of the receiving space 308, and the one-way valve can be arranged at
  • the lower frame 103 When the lower frame 103 is installed, it can be arranged on the side wall of the lower frame 103, which can also facilitate the gas in the receiving space 308 to be easily discharged to the outside of the receiving space 308.
  • the nitrogen generating device 105 includes: a housing 107 provided with an air outlet 106 for connecting the air inlet 601; a vacuum pump 401 having a pump inlet pipe 402 and a pump outlet pipe 406; Oxygen adsorbent, the adsorption cylinder 302 has a cylinder inlet pipe 405 and a cylinder outlet pipe 409. The cylinder inlet pipe 405 is connected to the pump inlet pipe 402 and the pump outlet pipe 406 at the same time.
  • the cylinder inlet pipe 405 and the pump inlet pipe 402 are connected with the first three Through valve 403, a second three-way valve 404 is connected between the cylinder inlet pipe 405 and the pump outlet pipe 406;
  • the nitrogen storage tank 303 has a tank inlet pipe 407 and a tank outlet pipe 408, and the tank inlet pipe 407 is in communication with the cylinder outlet pipe 409 ,
  • the gas outlet pipe 408 of the tank is in communication with the gas outlet 106.
  • carbon molecular sieve, zeolite, etc. can be selected as the oxygen adsorbent.
  • the vacuum pump 401 injects air of a certain positive pressure into the adsorption cylinder 302 in a controlled manner, and the oxygen adsorbent adsorbs the oxygen in the injected air.
  • the prepared nitrogen enters the nitrogen storage tank 303 from the gas outlet 106 of the adsorption cylinder 302, and the tank outlet pipe 408 of the nitrogen storage tank 303 communicates with the containing space 308 to provide nitrogen to it; during the desorption process, the vacuum pump 401 is controlled to a certain negative pressure
  • the air is pumped from the adsorption cylinder 302 to make it easier for oxygen to be desorbed from the oxygen adsorbent and discharged through the desorption air pipe.
  • the fresh-keeping device 100 of the embodiment of the present invention reduces the pressure requirements of the vacuum pump 401 due to the use of negative pressure desorption, which can reduce the volume, cost, and noise of the vacuum pump 401, thereby making it easier to be embedded in the refrigerator 900 and improve the performance of the refrigerator 900. Fresh-keeping performance. It should be noted that the negative pressure desorption also makes the impurity gas (water vapor, etc.) easier to desorb and discharge, which reduces the requirement for air cleanliness.
  • the pressure generated by the vacuum pump 401 is about 0.5 bar to 1 bar, which is sufficient to squeeze the air in the receiving space 308 to be discharged through the door seal or the one-way valve of the drawer 104.
  • the arrangement of the first three-way valve 403 and the second three-way valve 404 also enables the same vacuum pump 401 to provide air pressure for adsorption and air pressure for analysis, which further reduces the cost of the fresh-keeping device 100.
  • the overall structural volume is convenient for embedding the fresh-keeping device 100 into the refrigerator 900.
  • the controller can be arranged on the air-conditioning generating device 105, or can be separated on other equipment, for example Set on the refrigerator 900.
  • FIG. 7 shows the adsorption process of the nitrogen generating device 105, and the arrow direction shows the gas flow direction.
  • the vacuum pump 401 runs. Air enters from the left port of the first three-way valve 403, exits from the lower port, and closes the right port. The air passes through the pump inlet pipe 402, the pump outlet pipe 406, and then from The lower port of the second three-way valve 404 enters, the right port exits, the left port is closed, and enters the adsorption cylinder 302 through the cylinder inlet pipe 405 at a certain pressure to complete the oxygen adsorption process.
  • FIG. 8 shows the analysis process of the nitrogen generating device 105, and the arrow direction shows the gas flow direction.
  • the vacuum pump 401 runs, and the air is drawn from the adsorption cylinder 302, enters from the right port of the first three-way valve 403, exits from the lower port, and closes the left port, and then passes through the pump intake pipe 402, Pump out the air pipe 406, and then enter from the lower port of the second three-way valve 404, leave the left port, and close the right port to complete the oxygen analysis process.
  • the adsorption cylinder 302 can be made of low-cost molded plastic to reduce the weight of the nitrogen generating device 105 and reduce the manufacturing cost of the nitrogen generating device 105.
  • the right port of the first three-way valve 403 and the right port of the second three-way valve 404 to the cylinder intake pipe 405 of the adsorption cartridge 302, the right port of the first three-way valve 403 and the second three-way valve A three-way is provided between the right port of the valve 404 and the cylinder intake pipe 405.
  • the vacuum pump 401, the adsorption cylinder 302, and the nitrogen storage tank 303 are coplanarly arranged in the housing 107 to further reduce the overall thickness of the nitrogen generating device 105 and facilitate placement in
  • the rear side of the fresh-keeping box body 101 is used to reduce the volume of the entire fresh-keeping device 100.
  • the occupied space is relatively small. Based on the above-mentioned layout, those skilled in the art can optimize the design based on the principle of saving space.
  • a first one-way valve 410 is provided between the tube outlet pipe 409 and the tank air inlet pipe 407, and a second one-way valve 411 is provided between the air outlet 106 and the tank air outlet pipe 408.
  • the vacuum pump 401 will give the adsorption cylinder 302 a negative pressure, and the first one-way valve 410 can play a role. Prevent the backflow of nitrogen from the nitrogen storage tank 303.
  • the second one-way valve 411 By providing the second one-way valve 411, the effect of preventing the gas in the containing space 308 from returning to the nitrogen storage tank 303 can also be achieved. At the same time, due to the relatively sealed design of the containing space 308, its purpose is to maintain low oxygen in the containing space 308. Environment, the second check valve 411 also plays a role for this purpose.
  • the air inlet 601 of the sealed box body is formed with an inner hole cylinder
  • the air outlet 106 of the nitrogen generating device 105 is formed with a groove 603 matched with the inner hole cylinder, and the inner hole cylinder and the inner hole cylinder are arranged between There is a sealing ring 602.
  • the gas outlet 106 of the nitrogen generating device 105 can be used as a detachable structure, that is, a place for installing the gas outlet 106 is reserved on the nitrogen generating device 105.
  • a detachable structure that is, a place for installing the gas outlet 106 is reserved on the nitrogen generating device 105.
  • the right end of the air outlet 106 structure is set as an inner hole cylindrical structure, and a guiding part 604 is provided at the rightmost end of the inner hole cylinder, and at the same time, to prevent the air outlet 106
  • the structure also includes a limiting portion 605 to prevent the structure of the air outlet 106 from escaping from the reserved position.
  • a sealing strip 108 is provided between the opening 111 of the fresh-keeping box body 101 and the drawer 104 to ensure the tightness between the opening 111 and the drawer 104.
  • the sealing strip 108 is arranged on the lower frame 103, the contour shape of the inner side of the end cover 109 of the drawer 104 is adapted to the shape of the sealing strip 108, and the sealing strip 108 can be modified Polyvinyl chloride (PVC), vulcanized ethylene propylene diene rubber (EPDM) and thermoplastic ethylene propylene diene propylene rubber (EPDM/PP) rubber strips; the sealing strip 108 can also be set inside the end cover 109 of the drawer 104 to facilitate the preservation of the box body 101 The seal between the opening 111 and the drawer 104.
  • PVC Polyvinyl chloride
  • EPDM vulcanized ethylene propylene diene rubber
  • EPDM/PP thermoplastic ethylene propylene diene propylene rubber
  • the one-way valve is not provided on the lower frame 103 or the drawer 104, after the nitrogen generated by the nitrogen generator 105 is filled into the containing space 308, when the pressure value increases to a certain value, the gas in the containing space 308 can be changed from The sealing strip 108 is extruded.
  • the above pressure value is about 0.5 bar to 1 bar.
  • the cold air inlet 201 on one side wall of the upper frame 102 is opened on the same side of the air inlet 601 of the fresh-keeping box body 101, and on the opposite side wall (and the fresh-keeping A cold air outlet 306 is provided on the side of the opening 111 of the box body 101.
  • the refrigerating air duct 301 overlaps with the maximum extent of the accommodating space, so as to improve the cooling effect of the refrigerating air duct 301 on the accommodating space.
  • the upper frame 102 protrudes from the lower frame 103, so that the crisper body 101 is provided with a recess 307 on one side of the opening 111, and at least part of the end cover 109 of the drawer 104 is placed Inside the recess 307.
  • This arrangement can increase the cooling range of the cooling air duct 301 on the one hand, and on the other hand can prevent the end cover 109 of the drawer 104 from protruding on the fresh-keeping box body 101, which affects the overall appearance.
  • the cold air outlet 306 is located on the upper frame 102 and is adjacent to the end cover 109 of the drawer 104.
  • the end cover 109 of the drawer 104 shields the cold air outlet 306 of the cooling air duct 301, thereby affecting the fluidity of the cold air in the cooling air duct 301.
  • an oxygen concentration detection device (not shown in the figure) is also provided on the lower frame 103 or inside the drawer 104, and the nitrogen is controlled by obtaining the detection value of the oxygen concentration detection device.
  • the nitrogen production start time and the nitrogen production duration of the generator 105 are used to control the oxygen concentration more intelligently, improve the control accuracy, and prolong the preservation time of fruits and vegetables.
  • FIG. 9 shows a refrigerator 900 according to the second aspect of the present invention, which has a refrigerating compartment 901 and a refrigerating air duct (not shown in the figure), the refrigerating air duct is connected to the refrigerating compartment 901, and the refrigerating air duct has an air outlet (Not shown in the figure); the refrigerator 900 also has the fresh-keeping device 100 in the above-mentioned embodiment of the present invention, which is placed in the refrigerating compartment 901, in which the refrigerating air duct 301 communicates with the air outlet.
  • the refrigerating air duct is directly used to cool the containing space.
  • the temperature of the refrigerating compartment 901 of the refrigerator 900 is most suitable for the preservation of fruit and vegetable foods. Generally speaking, the reserved space is relatively large and suitable for the placement of the preservation device.
  • the fresh-keeping device 100 in order to supply power to the fresh-keeping device 100, the fresh-keeping device 100 must be electrically connected to the power supply of the refrigerator 900. In order to control the fresh-keeping device 100, the fresh-keeping device 100 must have its own controller or be connected to the refrigerator. The 900 controller is connected.
  • the air required by the nitrogen generator 105 is cold air in the refrigerating compartment 901, which can ensure that the temperature of the storage space 308 does not fluctuate too much, which is beneficial to the preservation of fruits and vegetables.

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Abstract

一种用于冰箱的保鲜装置及冰箱。保鲜装置(100)包括：保鲜盒体(101)，具有下层框架(103)和上层框架(102)，下层框架(103)设置有容纳空间，并设置有与容纳空间连通的开口(111)和进气口(601)，上层框架(102)设置有制冷风道(301)，制冷风道(301)用于给容纳空间制冷；抽屉(104)，能通过开口(111)进入并收容于容纳空间中，以与保鲜盒体(101)配合形成密闭的收容空间(308)；氮气发生装置(105)，连接于保鲜盒体(101)设置有进气口(601)的一侧，并能将生成的氮气通过进气口(601)充入收容空间(308)中。

Description

保鲜装置及冰箱
相关申请的交叉引用
本申请要求于2020年3月24日提交的申请号为202010211906.3、名称为“保鲜装置及冰箱”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明属于制冷储存设备领域，更具体而言，涉及保鲜装置及其冰箱。
背景技术
为了使得果蔬保鲜，常采用低温或者降低氧气浓度的方式，来减少果蔬的呼吸作用，放缓有机物消耗速度。
为降低氧气浓度，常采用增加氮气含量，以相对减少氧气含量的方式来实现，例如采用氮气发生装置，但现有的氮气发生装置常单独使用或者在冰箱中使用，但存在降氧速率慢的缺点，导致果蔬保鲜效果差。
以上内容仅用于辅助理解本发明的技术方案，并不代表承认上述内容是现有技术。
发明内容
本发明旨在至少在一定程度上解决上述技术问题之一。为此，本发明提出一种能够用于冰箱的降氧速率高的保鲜装置。
同时，还提出了一种具有上述保鲜装置的冰箱。
根据本发明的第一方面实施例的用于冰箱的保鲜装置，包括：保鲜盒体，具有下层框架和上层框架，所述下层框架设置有容纳空间，并设置有连通所述容纳空间的开口及进气口，所述上层框架设置有制冷风道，所述制冷风道用于给所述容纳空间制冷；抽屉，能通过所述开口进入并收容于所述容纳空间中，以与所述保鲜盒体配合形成密闭的收容空间；氮气发生装置，连接于所述保鲜盒体设置有所述进气口的一侧，并能将生成的氮气通过所述进气口充入所述收容空间中。
根据本发明实施例的保鲜装置，至少具有如下有益效果：采用抽屉式的结构，且所述抽屉与所述盒体配合形成密闭的收容空间，能保证氮气充入收容空间后，迅速降低氧气的浓度；在所述保鲜盒体上设置制冷风道，能提升收容空间的制冷效果，而且良好的降氧效果和制冷能力使得果蔬的保鲜效果得以提升。
根据本发明的一些实施例，所述保鲜装置还包括：第一单向阀，设置于所述下层框架或者所述抽屉上，以使得所述收容空间内的气体能排出到所述保鲜装置外，同时避免外界 的富氧气体进入到收容空间内。
根据本发明的一些实施例，所述氮气发生装置包括：壳体，设置有用于连接所述进气口的出气口；真空泵，具有泵进气管和泵出气管；吸附筒，内部设置有氧气吸附剂，所述吸附筒具有筒进气管和筒出气管，所述筒进气管同时连接所述泵进气管和所述泵出气管，所述筒进气管与所述泵进气管之间连接有第一三通阀，所述筒进气管与所述泵出气管之间连接有第二三通阀；氮气储罐，具有罐进气管和罐出气管，所述罐进气管与所述筒出气管连通，所述罐出气管与所述出气口连通。
根据本发明的一些实施例，所述真空泵、所述吸附筒和所述氮气储罐共面设置于所述壳体内。
根据本发明的一些实施例，所述筒出气管与所述罐进气管之间设置有第一单向阀，所述出气口与所述罐出气管之间设置有第二单向阀。
根据本发明的一些实施例，所述进气口形成有内孔圆柱，所述出气口形成有与所述内孔圆柱配合的凹槽，所述凹槽与所述内孔圆柱之间设置有密封圈。
根据本发明的一些实施例，所述开口与所述抽屉之间设置有密封条，以保证所述开口与所述抽屉之间的密封性。
根据本发明的一些实施例，所述上层框架的一侧侧壁上开设有冷风进口，相对的另一侧侧壁上开设有冷风出口，所述冷风进口和所述冷风出口均与所述制冷风道连通。
根据本发明的一些实施例，所述抽屉包括端盖，所述上层框架凸出所述下层框架设置，以使得所述保鲜盒体在所述开口的一侧形成凹部，至少部分所述端盖置于所述凹部内。
根据本发明的第二方面实施例的冰箱，包括：冷藏间室；冷藏风道，与冷藏间室连通，所述冷藏风道具有出风口；根据权利要求1至9所述的保鲜装置，置于所述冷藏间室中，其中，所述制冷风道与所述出风口连通。
根据本发明实施例的冰箱，除具有所述保鲜装置具有的技术效果外，至少具有如下有益效果：所述冰箱的冷藏间室内设置独立的保鲜装置，增加冰箱的用途，且不会因开动冰箱门而影响收容空间的保鲜环境。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是本发明实施例的保鲜装置的立体爆炸示意图；
图2是本发明实施例的保鲜装置的左视图；
图3是图2所示的本发明实施例的保鲜装置的A-A剖视图；
图4是本发明实施例的保鲜装置的氮气发生装置的内部结构原理图；
图5是本发明实施例的保鲜装置的氮气发生装置的俯视图；
图6是本发明实施例的保鲜装置的氮气发生装置的B处结构放大图；
图7是本发明实施例的保鲜装置的氮气发生装置制氮过程的原理图；
图8是本发明实施例的保鲜装置的氮气发生装置解析过程的原理图；以及
图9是本发明实施例的冰箱的立体结构示意图。
附图标记：保鲜装置100；保鲜盒体101；上层框架102；下层框架103；抽屉104；氮气发生装置105；出气口106；壳体107；密封条108；端盖109；导轨110；开口111；
冷风进口201；
制冷风道301；吸附筒302；氮气储罐303；冷空气流304；氮气流305；冷风出口306；凹部307；收容空间308；
真空泵401；泵进气管402；第一三通阀403；第二三通阀404；筒进气管405；泵出气管406；罐进气管407；罐出气管408；筒出气管409；第一单向阀410；第二单向阀411；
进气口601；密封圈602；凹槽603；导向部604；限位部605；
冰箱900；冷藏间室901。
具体实施方式
下面详细描述本发明的实施方式，实施方式的示例在附图中示出，其中相同或类似的标号自始至终表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
此外，术语“第一”及“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”及“第二”的特征可以明示或者隐含地包括一个或者更多个特征。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“连接”应做广义理解，例如，可以是固定连接或活动连接，也可以是可拆卸连接或不可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通信；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通、间接连通或两个元件的相互作用关系。
在本发明的描述中，需要说明的是，本发明冰箱900及保鲜装置100中的各个元件的技术名称，对本领域技术人员而言，应做广义理解，而不能限制技术构思的应用范围。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同方案。
参照图1至图5所示，为本发明第一方面的保鲜装置100，其用于冰箱900中，冰箱900可以指的是广义的制冷存储设备，例如电冰箱、电冰柜、冷藏柜。
在一些实施例中，参照图1所示，一种保鲜装置100，包括：保鲜盒体101，包括上层框架102和下层框架103，下层框架103设置有容纳空间，下层框架103的一侧设置有与容纳空间连通的开口111，与开口111相对的另一侧设置有与容纳空间连通的进气口601，上层框架102设置有制冷风道301，用于给容纳空间制冷；抽屉104，能通过开口111进入并收容于容纳空间中，以与保鲜盒体101配合形成密闭的收容空间308；氮气发生装置105，连接于保鲜盒体101上设置有进气口601的一侧，即保鲜盒体101的后侧，并能将生成的氮气通过进气口601充入收容空间308中。需要说明的是，进气口601也可以设置在其它侧，需根据冰箱900的冷藏间室901的结构来具体确定。
在上述实施例中，可以理解的是，为了保证抽屉104与保鲜盒体101配合形成密闭的收容空间308，下层框架103本身除了开口111以及进气口601外，应构成封闭的结构，并且上层框架102的制冷风道301与下层框架103的容纳空间应该隔离的。
需要说明的是，参照图3所示，冷空气从冷风进口201进入制冷风道301，而后从冷风出口306排出，而形成冷空气流304，以使得制冷风道301与容纳空间进行热交换，降低容纳空间的温度。氮气发生装置105生成的氮气则通过进气口601(参照图6所示)进入收容空间308中，从而形成氮气流305。作为本领域可以知悉的是，为了让制冷风道301的低温尽快传递到容纳空间，上层框架102与下层框架103之间的隔离件选择传热效率好的材料，例如金属等。
在上述实施例中，氮气发生装置105利用PSA制氮方法，将空气(本实施例中也可以是冰箱900内的冷空气)中氧气去除从而产生纯净的氮气，再将氮气注入收容空间308内部以实现使水果蔬菜等食品保鲜的目的。变压吸附PSA(Pressure Swing Adsorption)是目前生产气体的一项主流技术，变压吸附具体是指在温度不变的情况下，对混合气体进行加压，并利用吸附剂吸附多余的杂质气体从而获得较为纯净的单一气体，再用减压或常压的方法使得吸附剂内的杂质气体解吸出来，以对吸附剂进行二次利用。氧气吸附剂是目前实现氧氮分离，从空气中提取氮气的常用吸附剂，在吸附压力相同时，氧气吸附剂对氧的吸附量大大高于对氮的吸附量。PSA制氮方法利用这一原理，以空气为原料，运用变压吸附技术，利用氧气吸附剂对氧和氮的选择性吸附，实现空气中的氮和氧分离，从而生产出纯净的氮气。
在上述实施例中，保鲜装置100可根据需要整体置于某一低温环境中，也可以将保鲜 装置100的制冷风道301直接连接现成的制冷设备的风道，以实现容纳空间的快速制冷。
在上述实施例中，为了确保抽屉104能够方便进入容纳空间中，并且能将容纳空间准确封闭，以形成密闭的收容空间308，下层框架103内部设置导轨110，本领域技术人员可以知悉的是，抽屉104底部也设置导轨110配合的导向机构(图中未示出)。
另外，作为本领域技术人员可以知悉的是，为了给保鲜装置100供电，保鲜装置100使用时必然与电源进行电连接，为了对保鲜装置100进行控制，保鲜装置100必然自身具有控制器或者与外界的控制器进行连接。
根据本发明实施例的保鲜装置100，至少具有如下有益效果：采用抽屉104式结构，能够方便打开且便于密封；抽屉104与保险盒体101配合形成密闭的收容空间308后，能保证氮气发生装置105产生的氮气迅速的充入收容空间308，随着压力的增大，收容空间308的富氧气体被挤出收容空间308，由于气体扩散原理，气体从高浓度的地方向低浓度的地方自然扩散，很快抽屉104内氮气浓度就可以提升到设定值(即相对地，氧气浓度就可以降低到设定值)，并保持浓度均匀；而在保鲜盒体101上设置制冷风道301，能提升收容空间308的制冷效果，良好的降氧效果和制冷能力使得食品(即蔬菜、水果等)的保鲜效果得以提升。另外的，通过将保鲜盒体101和氮气发生装置105设置为整体式结构，能大大缩小保鲜装置100的体积，可以作为模块化结构置于冰箱900中使用，使得保鲜装置100的应用更加灵活。
在一些实施例中，保鲜装置100还包括单向阀(图中未示出)，设置于下层框架103或者抽屉104上，以使得收容空间308内的气体能排出到保鲜装置100外。
通过设置单向阀，其目的在于：当氮气发生装置105生成的氮气进入收容空间308后，随着压力的增加，可使得收容空间308的气体通过单向阀排出到收容空间308外，同时防止外界的空气通过单向阀进入到收容空间308内，从而使得收容空间308的氮气浓度提高，氧气浓度下降，以提供一个低氧的环境。需要说明的是，单向阀设置在抽屉104上时，可设置于抽屉104的外侧，即设置在端盖109上，以便收容空间308的气体方便排出到收容空间308外，单向阀设置在下层框架103上时，可设置于下层框架103的侧壁上，同样可以便于收容空间308的气体方便排出到收容空间308外。
在一些实施例中，氮气发生装置105包括：壳体107，设置有用于连接进气口601的出气口106；真空泵401，具有泵进气管402和泵出气管406；吸附筒302，内部设置有氧气吸附剂，吸附筒302具有筒进气管405和筒出气管409，筒进气管405同时连接泵进气管402和泵出气管406，筒进气管405与泵进气管402之间连接有第一三通阀403，筒进气管405与泵出气管406之间连接有第二三通阀404；氮气储罐303，具有罐进气管407 和罐出气管408，罐进气管407与筒出气管409连通，罐出气管408与出气口106连通。需要说明的是，氧气吸附剂可选择碳分子筛、沸石等。
在吸附过程中，真空泵401受控地向吸附筒302注入一定正压力的空气，氧气吸附剂吸附掉注入空气中的氧气。制备的氮气从吸附筒302的出气口106进入氮气储罐303，氮气储罐303的罐出气管408连通收容空间308以向其提供氮气；在解吸过程中，真空泵401受控地以一定负压力从吸附筒302抽气，使氧气更容易从氧气吸附剂上脱附并通过解吸出气管排出。
传统的PSA制氮装置大多用于大规模制氮，并且包括空气罐和油水分离装置，空气压缩机工作压力大，体积庞大，结构复杂，不能满足为冰箱900制氮的要求。本发明实施例的保鲜装置100，因采用负压解吸，降低了对真空泵401压力要求，可以使真空泵401体积减小、成本降低、噪音降低，从而更容易嵌入到冰箱900内部，提高冰箱900的保鲜性能。需要说明的是，负压解吸同时使杂质气体(水蒸气等)更容易脱附排出，降低了对空气洁净度的要求。同时，真空泵401的产生的压力在0.5bar～1bar左右，该压力足以挤压收容空间308中的空气通过抽屉104的门封或单向阀排出。并且，第一三通阀403和第二三通阀404的设置也使得同一真空泵401即为吸附提供了空气压力作用，又为解析提供了空气压力作用，也进一步的减小了保鲜装置100的整体结构体积，便于保鲜装置100嵌入到冰箱900内部。本领域技术人员可以知悉的是，为实现下述过程，必然通过控制器(图中未示出)来实现，控制器可以设置在气调发生装置105上，也可以分离在其他设备上，例如设置在冰箱900上。
为了更清楚的说明氮气发生装置105的工作过程，现在参照图7、图8进行说明。
图7示出的是氮气发生装置105的吸附过程，箭头方向示出的是气体流动方向。当收到启动吸附过程的命令后，真空泵401运转，空气从第一三通阀403的左口进，下口出，右口封闭，空气依次通过泵进气管402、泵出气管406，然后从第二三通阀404的下口进，右口出，左口封闭，并以一定的压力通过筒进气管405进入吸附筒302完成氧气吸附过程。
图8示出的是氮气发生装置105的解析过程，箭头方向示出的是气体流动方向。当收到启动解析过程的命令后，真空泵401运转，空气从吸附筒302中抽出，由第一三通阀403的右口进，下口出，左口封闭，然后依次通过泵进气管402、泵出气管406，再从第二三通阀404的下口进，左口出，右口封闭，完成氧气解析过程。
需要进一步说明的是，吸附筒302可采用低成本模压塑料制成，以减轻氮气发生装置105的重量，并降低氮气发生装置105的制造成本。为了使得第一三通阀403的右口和第二三通阀404的右口都能连接到吸附筒302的筒进气管405，可在第一三通阀403的右口、 第二三通阀404的右口和筒进气管405之间设置一三通。
在一些实施例中，参照图4、图5所示，真空泵401、吸附筒302和氮气储罐303共平面设置于壳体107内，以进一步减小氮气发生装置105的整体厚度，便于放置在保鲜盒体101后侧，从而减小整个保鲜装置100的体积。对于管路结构及阀类结构而言，占用空间相对较少，在上述布局的基础上，本领域技术人员能够本着节省空间的原则，进行优化设计。
在一些实施例中，参照图4所示，筒出气管409与罐进气管407之间设置有第一单向阀410，出气口106与罐出气管408之间设置有第二单向阀411。通过设置第一单向阀410，可防止氮气储罐303的氮气回流到吸附筒302中，尤其在解析过程中，真空泵401会给吸附筒302一负压，第一单向阀410能起到阻止氮气储罐303的氮气回流的作用。通过设置第二单向阀411，同样能起到防止收容空间308中的气体回流到氮气储罐303的效果，同时，由于收容空间308的相对密封设计，其目的在于维持收容空间308的低氧环境，第二单向阀411对此目的也起到了作用。
在一些实施例中，密封盒体的进气口601形成有内孔圆柱，氮气发生装置105的出气口106形成有与内孔圆柱配合的凹槽603，内孔圆柱与内孔圆柱之间设置有密封圈602。如此设置，在保鲜装置100安装过程中，当氮气发生装置105安装在保鲜盒体101后，氮气发生装置105的出气口106与密封盒体的进气口601能通过密封圈602自动密封，从而减少了用软管接头连接的麻烦，保鲜装置100一体性更佳。
需要说明的是，氮气发生装置105的出气口106可以作为可拆卸的结构，即氮气发生装置105上预留有安装出气口106的位置，组装时，只需将出气口106结构嵌入预留位置即可。此时为方便将出气口106结构嵌入到预留位置内，出气口106结构的右端设置为内孔圆柱的结构，并且在内孔圆柱的最右端设置导向部604，同时，为防止出气口106结构还包括限位部605，以防止出气口106结构从预留位置中脱出。
在一些实施例中，参照图1所示，保鲜盒体101的开口111与抽屉104之间设置有密封条108，以保证开口111与抽屉104之间的密封性。需要说明的是，根据保鲜盒体101的整体结构，密封条108设置在下层框架103上，抽屉104的端盖109内侧的轮廓形状同密封条108的形状相适应，密封条108可以采用改性聚氯乙烯(PVC)，硫化三元乙丙橡胶(EPDM)和热塑性三元乙丙橡胶(EPDM/PP)胶条；密封条108也可设置抽屉104的端盖109内侧，方便保鲜盒体101的开口111与抽屉104之间的密封。可以理解的是，当下层框架103或者抽屉104上没有设置单向阀时，氮气发生装置105产生的氮气充入收容空间308后，压力值增加到一定值时，可将收容空间308的气体从密封条108处挤出。上述压 力值为0.5bar～1bar左右。
在一些实施例中，参照图3所示，上层框架102的一侧侧壁上冷风进口201开设在保鲜盒体101的进气口601的同一侧，相对的另一侧侧壁上(及保鲜盒体101的开口111一侧)开设有冷风出口306。通过在将冷风进口201和冷风出口306沿着抽屉104的移动方向设置，使得制冷风道301与容纳空间最大范围重合，以提高制冷风道301对容纳空间的制冷效果。
在一些实施例中，参照图3所示，上层框架102凸出下层框架103设置，以使得保鲜盒体101在开口111的一侧设置形成一凹部307，至少部分抽屉104的端盖109置于所述凹部307内。如此设置，一方面能加大制冷风道301的制冷范围，另一方面能避免抽屉104的端盖109凸设于保鲜盒体101上，影响整体美观。
需要说明的是，冷风出口306及位于上层框架102上，与抽屉104的端盖109邻近的位置处，当抽屉104闭合后，抽屉104的端盖109和上层框架102之间具有缝隙，以防止抽屉104的端盖109将制冷风道301的冷风出口306遮蔽，从而影响制冷风道301的冷空气的流动性。
在一些实施例中，为了检测收容空间308的氧气浓度，在下层框架103上或者抽屉104内侧还具有氧气浓度检测装置(图中未示出)，通过获取氧气浓度检测装置的检测数值来控制氮气发生装置105的制氮开始时间以及制氮时长，以更加智能化的控制氧气浓度，提高控制精度，延长果蔬类食品的保鲜时间。
参照图9所示，为本发明第二方面的冰箱900，其具有冷藏间室901及冷藏风道(图中未示出)，冷藏风道与冷藏间室901连通，冷藏风道具有出风口(图中未示出)；冰箱900还具有上述本发明实施例中的保鲜装置100，置于冷藏间室901中，其中制冷风道301与出风口连通。从而直接利用冷藏风道为容纳空间降温。
需要说明的是，冰箱900冷藏间室901的温度最适应果蔬类食品的保鲜，通常而言，预留空间较大，适合保鲜装置的放置。另外，作为本领域技术人员可以知悉的是，为了给保鲜装置100供电，保鲜装置100必然与冰箱900电源进行电连接，为了对保鲜装置100进行控制，保鲜装置100必然自身具有控制器或者与冰箱900的控制器进行连接。
氮气发生装置105所需要的空气为冷藏间室901的冷空气，这样能保证收容空间308的温度不会发生太大波动，有利于果蔬的保鲜。
尽管已经示出和描述了本发明的实施方式，本领域的普通技术人员可以理解：以上仅为本发明的实施方式，旨在体现本发明的突出技术效果和优势，并非是对本发明的技术方案的限制。本领域技术人员应当了解的是，一切基于本发明技术内容所做出的修改、变化 或者替代技术特征，皆应涵盖于本发明所附权利要求主张的技术范畴内。

Claims (10)

  1. 一种保鲜装置，用于冰箱，包括：
    保鲜盒体，具有下层框架和上层框架，所述下层框架设置有容纳空间，并设置有连通所述容纳空间的开口及进气口，所述上层框架设置有制冷风道，所述制冷风道用于给所述容纳空间制冷；
    抽屉，能通过所述开口进入并收容于所述容纳空间中，以与所述保鲜盒体配合形成密闭的收容空间；以及
    氮气发生装置，连接于所述保鲜盒体设置有所述进气口的一侧，并能将生成的氮气通过所述进气口充入所述收容空间中。
  2. 根据权利要求1所述的保鲜装置，还包括：
    单向阀，设置于所述下层框架或者所述抽屉上，以使得所述收容空间内的气体能排出到所述保鲜装置外。
  3. 根据权利要求1所述的保鲜装置，其中，所述氮气发生装置包括：
    壳体，设置有用于连接所述进气口的出气口；
    真空泵，具有泵进气管和泵出气管；
    吸附筒，内部设置有氧气吸附剂，所述吸附筒具有筒进气管和筒出气管，所述筒进气管同时连接所述泵进气管和所述泵出气管，所述筒进气管与所述泵进气管之间连接有第一三通阀，所述筒进气管与所述泵出气管之间连接有第二三通阀；以及
    氮气储罐，具有罐进气管和罐出气管，所述罐进气管与所述筒出气管连通，所述罐出气管与所述出气口连通。
  4. 根据权利要求3所述的保鲜装置，其中，所述真空泵、所述吸附筒和所述氮气储罐共面设置于所述壳体内。
  5. 根据权利要求3所述的保鲜装置，其中，所述筒出气管与所述罐进气管之间设置有第一单向阀，所述出气口与所述罐出气管之间设置有第二单向阀。
  6. 根据权利要求1所述的保鲜装置，其中，所述进气口形成有内孔圆柱，所述出气口形成有与所述内孔圆柱配合的凹槽，所述凹槽与所述内孔圆柱之间设置有密封圈。
  7. 根据权利要求1所述的保鲜装置，其中，所述开口与所述抽屉之间设置有密封条，以保证所述开口与所述抽屉之间的密封性。
  8. 根据权利要求1所述的保鲜装置，其中，所述上层框架的一侧侧壁上开设有冷风进口，相对的另一侧侧壁上开设有冷风出口，所述冷风进口和所述冷风出口均与所述制冷风道连通。
  9. 根据权利要求1所述的保鲜装置，其中，所述抽屉包括端盖，所述上层框架凸出所 述下层框架设置，以使得所述保鲜盒体在所述开口的一侧形成凹部，至少部分所述端盖置于所述凹部内。
  10. 冰箱，包括：
    冷藏间室；
    冷藏风道，与冷藏间室连通，所述冷藏风道具有出风口；以及
    根据权利要求1至9任一项所述的保鲜装置，置于所述冷藏间室中，其中所述制冷风道与所述出风口连通。
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