WO2022111299A1 - 循环排氧装置和厨房电器 - Google Patents
循环排氧装置和厨房电器 Download PDFInfo
- Publication number
- WO2022111299A1 WO2022111299A1 PCT/CN2021/130152 CN2021130152W WO2022111299A1 WO 2022111299 A1 WO2022111299 A1 WO 2022111299A1 CN 2021130152 W CN2021130152 W CN 2021130152W WO 2022111299 A1 WO2022111299 A1 WO 2022111299A1
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- WO
- WIPO (PCT)
- Prior art keywords
- oxygen
- adsorption tower
- air
- fresh
- keeping chamber
- Prior art date
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 359
- 239000001301 oxygen Substances 0.000 title claims abstract description 359
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 359
- 238000001179 sorption measurement Methods 0.000 claims abstract description 269
- 239000007789 gas Substances 0.000 claims description 158
- 239000000872 buffer Substances 0.000 claims description 90
- 238000003860 storage Methods 0.000 claims description 52
- 239000002808 molecular sieve Substances 0.000 claims description 20
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 20
- 229910021536 Zeolite Inorganic materials 0.000 claims description 19
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 19
- 239000010457 zeolite Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 11
- 125000004122 cyclic group Chemical group 0.000 claims 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 26
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 11
- 238000004321 preservation Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000003795 desorption Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 235000012055 fruits and vegetables Nutrition 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 210000003437 trachea Anatomy 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
Definitions
- the present application relates to the technical field of home appliances, and in particular, to a circulating oxygen exhaust device and a kitchen appliance.
- the present application provides a circulating oxygen exhaust device and a kitchen appliance to solve the technical problem of low oxygen exhaust efficiency in a refrigerator in the prior art.
- a technical solution adopted in the present application is to provide a circulating oxygen exhaust device, which is used to discharge oxygen to the fresh-keeping chamber, and the circulating oxygen exhaust device includes an air pump and an adsorption tower:
- the air inlet of the air pump is communicated with the fresh-keeping chamber
- the adsorption tower includes an air inlet, an air outlet and an oxygen outlet, the air inlet of the adsorption tower is connected to the air outlet of the air pump, and the air outlet of the adsorption tower is connected to the fresh-keeping chamber;
- the air pump continues to operate within the cycle time to continuously discharge oxygen to the fresh-keeping chamber.
- the circulating oxygen exhaust device is used to return the residual gas after the oxygen exhaustion to the fresh-keeping chamber, and is used to circulate and exhaust the residual air in the fresh-keeping chamber, so as to reduce the oxygen content of the fresh-keeping chamber.
- the circulating oxygen exhaust device is used to deoxygenate the air in the fresh-keeping chamber, and return the residual air after the deoxygenation to the fresh-keeping chamber; and then extract the mixture of residual air and air from the fresh-keeping chamber to deoxygenate the mixture, and Then, the residual gas after deoxygenation is returned to the fresh-keeping chamber to be discharged again by the circulating oxygen-exhausting device, and the cycle is repeated, so that the circulating oxygen-exhausting device can continuously discharge oxygen to the fresh-keeping chamber within the cycle time.
- the air intake flow rate of the air inlet of the air pump is 3L/min ⁇ 10L/min
- the air outlet flow rate of the oxygen exhaust port is 0.1L/min ⁇ 0.5L/min.
- the pressure of the air pump is 30KPa ⁇ 100KPa.
- the circulating oxygen exhaust device includes at least two buffer tanks, the at least two buffer tanks are connected in sequence, the air inlet of the first buffer tank of the at least two buffer tanks is connected to the air outlet of the adsorption tower, and the air inlet of the last buffer tank is connected to the air outlet of the adsorption tower.
- the air outlet is communicated with the fresh-keeping chamber.
- the circulating oxygen exhaust device includes a valve assembly, the air outlet of the air pump is connected to the air inlet of the adsorption tower through the air inlet channel of the valve assembly, and the air outlet of the adsorption tower is connected to the fresh-keeping chamber through the air outlet channel of the valve assembly.
- the circulating oxygen exhaust device includes an oxygen storage tank, and the oxygen exhaust port of the adsorption tower is connected to the oxygen storage tank.
- the adsorption tower, the buffer tank and the oxygen storage tank are all cylindrical, have the same height, and are arranged side by side at the same level.
- the diameter of the adsorption tower, the buffer tank and the oxygen storage tank are all 20mm to 40mm, and the heights are all 100mm to 160mm;
- the adsorption tower is provided with zeolite molecular sieve particles, and the size of the zeolite molecular sieve particles is 0.4 mm to 0.8 mm.
- the adsorption tower, buffer tank and oxygen storage tank are composed of an integrated tank tower and bottom plate
- the tank tower includes a plurality of cavities that constitute the adsorption tower, buffer tank and oxygen storage tank
- the bottom plate is covered on the tank tower to seal multiple A cavity is formed, and a plurality of cavities are respectively formed into an adsorption tower, a buffer tank and an oxygen storage tank which are isolated from each other.
- the air inlet and air outlet of the adsorption tower are arranged at the top of the adsorption tower, and the oxygen outlet is arranged at the bottom end of the adsorption tower; the air inlet and air outlet of the buffer tank are both arranged at the top of the buffer tank; The air inlet is arranged at the bottom end of the oxygen storage tank;
- the circulating oxygen exhaust device includes a gas circuit board, which is arranged at the top of the adsorption tower, the buffer tank and the oxygen storage tank; the gas circuit board is formed with a first gas path, a second gas path and a third gas path, and the first gas path is connected to the adsorption
- the air outlet of the tower and the air outlet channel of the valve assembly, the second gas path is connected to the air outlet channel of the valve assembly and the first buffer tank;
- the third air path is connected to the air inlet channel of the valve assembly and the air inlet of the adsorption tower.
- the circulating oxygen exhaust device also includes a control device, and the control device is connected to the valve assembly,
- the control device controls the valve assembly to open the air inlet channel, so that the air pump pressurizes the air in the fresh-keeping chamber to the adsorption tower, and the adsorption tower filters out the oxygen in the air, discharges it from the air outlet of the adsorption tower, and absorbs the remaining gas; the control device controls the valve
- the air intake channel of the assembly is closed, so that the air pump stops pressurizing and transmitting air to the adsorption tower, and the adsorption tower releases the residual gas, which is discharged to the fresh-keeping chamber through the air inlet of the adsorption tower and the air outlet channel of the valve assembly.
- control device includes an oxygen detector for detecting the oxygen content of the fresh-keeping chamber, and the control device controls the operation of the air pump and valve assembly based on the oxygen content of the fresh-keeping chamber; and/or,
- the control device includes an opening and closing detector for detecting the opening and closing conditions of the fresh-keeping chamber, and the control device controls the operation of the air pump and the valve assembly based on the opening and closing conditions of the fresh-keeping chamber.
- the two adsorption towers are divided into a first adsorption tower and a second adsorption tower; the valve assembly corresponding to each first adsorption tower has a first air inlet channel and a first air outlet channel, corresponding to each first adsorption tower.
- the second adsorption tower has a second inlet channel and a second outlet channel; alternately control the opening of the first inlet channel and the closure of the second inlet channel in the valve assembly, or the closure of the first outlet channel and the opening of the second outlet channel.
- a technical solution adopted in the present application is to provide a kitchen appliance, which includes the above-mentioned circulating oxygen exhaust device, and the circulating oxygen exhaust device is connected to the fresh-keeping chamber in the kitchen appliance;
- the fresh-keeping chamber is provided with a one-way valve, and the air outside the fresh-keeping chamber can enter the interior through the one-way valve.
- the circulating oxygen-exhausting device of the present application includes an air pump and an adsorption tower; the circulating oxygen-exhausting device operates continuously during the cycle time, and continuously discharges oxygen to the gas in the fresh-keeping room, so as to gradually reduce the oxygen content of the gas in the fresh-keeping room, so that the adsorption tower does not need to be once A large amount of oxygen is removed from the pressurized gas, and a small amount of oxygen in the pressurized gas can be discharged from the adsorption tower each time, and the oxygen content of the gas in the fresh-keeping chamber can be reduced by repeated oxygen discharge cycles.
- the air pump may not pressurize the air in the fresh-keeping chamber to a higher pressure value, so that the application can use a small air pump to reduce the noise caused by oxygen control and fresh-keeping;
- the air in the fresh-keeping chamber of the valve is circulated to discharge oxygen, and the air pump can only extract a relatively small amount of gas in the fresh-keeping chamber per unit time, so only a small amount of outside air needs to be supplemented into the fresh-keeping chamber through the one-way valve, so there will only be a small amount of air in the fresh-keeping chamber.
- the oxygen in the fresh-keeping room is supplemented into the fresh-keeping room, which will not have a great impact on reducing the oxygen content of the fresh-keeping room gas, which can not only ensure the pressure balance of the fresh-keeping room, but also can efficiently reduce the oxygen content of the fresh-keeping room gas to lower level.
- FIG. 1 is a schematic structural diagram of a kitchen appliance according to an embodiment of the present application.
- Fig. 2 is the decomposition schematic diagram of the circulating oxygen exhaust device according to an embodiment of the present application
- FIG. 3 is a schematic diagram of the installation of an air pump in a circulating oxygen exhaust device according to an embodiment of the present application
- FIG. 4 is a schematic diagram of gas flow in a circulating oxygen exhaust device according to an embodiment of the present application.
- FIG. 5 is a schematic diagram of a gas circuit in a circulating oxygen exhaust device according to an embodiment of the present application.
- FIG. 6 is a schematic diagram of a gas path plate in a circulating oxygen exhaust device according to an embodiment of the present application.
- FIG. 7 is a schematic structural diagram of a circulating oxygen exhaust device according to another embodiment of the present application.
- the kitchen appliance 1 includes a fresh-keeping chamber 10 and a circulating oxygen exhaust device 20 .
- the circulating oxygen exhaust device 20 exhausts the gas in the fresh-keeping chamber 10 and returns it to the fresh-keeping chamber 10 again. , so as to achieve oxygen control and preservation. 70% to 93% of the oxygen in the gas in the fresh-keeping chamber 10 can be eliminated by the circulating oxygen exhaust device 20 of the present application.
- the kitchen appliance 1 of the present application may be a household appliance such as a refrigerator, an oven or a juicer, which needs to be kept fresh by reducing the oxygen content.
- the oven includes a baking cavity and a circulating oxygen exhausting device 20 , wherein the baking cavity of the oven can be used as the fresh-keeping chamber 10 , and the circulating oxygen exhausting device 20 is communicated with the baking cavity, so that the baking cavity can be removed by the circulating oxygen exhausting device 20 .
- the oxygen content of the inner gas is controlled at a low level, so as to keep the fruits and vegetables fresh when they are roasted, and prevent the fruits and vegetables from being oxidized and discolored.
- the juice machine includes a juice extraction chamber and a circulating oxygen exhaust device 20, wherein the juice extraction chamber of the juice machine can be used as the fresh-keeping chamber 10, and the circulation oxygen exhaust device 20 is communicated with the juice extraction chamber, so that the circulation oxygen exhaust device 20 can
- the oxygen content of the gas in the juicing chamber is controlled at a low level, so as to preserve the freshness of the fruits and vegetables when juicing the fruits and vegetables, and prevent the fruit and vegetables from being oxidized and resulting in discoloration of the juice.
- the circulating oxygen exhaust device 20 can communicate with the opening at the top of the juice extraction chamber.
- the circulating oxygen exhaust device 20 can exhaust oxygen to the gas in the juice extraction chamber of the juice machine after the juice machine is charged and before the juice is extracted.
- the fresh-keeping chamber 10 may be a non-hermetic space.
- the fresh-keeping chamber 10 can be communicated with the outside air through a one-way valve, wherein, when the air pressure of the fresh-keeping chamber 10 is lower than the air pressure outside the fresh-keeping chamber 10 when the circulating oxygen exhaust device 20 draws gas from the fresh-keeping chamber 10, the air outside the fresh-keeping chamber 10 will pass through.
- the one-way valve enters the fresh-keeping chamber 10 to keep the fresh-keeping chamber 10 at normal pressure, so that there will not be a large pressure difference inside and outside the fresh-keeping chamber 10, so that the fresh-keeping chamber 10 is easier to open, so that the outer wall of the fresh-keeping chamber 10 does not need to bear a large pressure.
- the one-way valve works automatically. Under the action of the gas pressure flowing from the outside to the fresh-keeping chamber 10, the valve flap in the one-way valve opens; and when the gas flows in the opposite direction, that is, the gas flows from the fresh-keeping chamber 10 to the fresh-keeping chamber. When it is outside 10, the pressure of the gas flowing from the fresh-keeping chamber 10 to the outside world and the self-coincidence of the valve flap act on the valve seat, thereby cutting off the flow.
- the fresh-keeping chamber 10 may be a closed space, so that the air in the fresh-keeping chamber 10 is not communicated with the atmosphere, so that at least part of the oxygen in the air in the fresh-keeping chamber 10 can be removed and the oxygen-removed air can be removed again.
- the air is returned to the fresh-keeping chamber 10, which can reduce the oxygen content of the fresh-keeping chamber 10, and can realize oxygen control and fresh-keeping; and can reduce the total air content in the fresh-keeping chamber 10, so that the air in the fresh-keeping chamber 10 is in a negative pressure state, so as to realize the negative pressure.
- Pressure preservation that is, the dual preservation effect of oxygen control preservation and negative pressure preservation can be achieved, so as to achieve a better preservation effect.
- the fresh-keeping chamber 10 may be a fresh-keeping chamber 10 for storing vegetables, fruits and other ingredients.
- the respiration rate of the ingredients stored therein can be reduced, the metabolism of the ingredients can be inhibited, the effect of fresh-keeping can be achieved, and deterioration and reproduction of bacteria can be inhibited.
- the fresh-keeping chamber 10 is arranged in the kitchen appliance 1 in the form of a drawer, and the circulating oxygen exhaust device 20 is arranged behind the fresh-keeping chamber 10 , that is, the circulating oxygen exhaust device 20 is arranged in the fresh-keeping chamber 10 away from the kitchen appliance. 1 side of the door, so that when the fresh-keeping chamber 10 is opened, the position of the circulating oxygen exhaust device 20 will not be affected, and the connection relationship between the internal components of the circulating oxygen exhaust device 20 will not be affected.
- the fresh-keeping chamber 10 may be constituted by a cavity built into the body, and the refrigerator may further include a door for opening and closing the fresh-keeping chamber 10 .
- the kitchen appliance 1 further includes an oxygen-enriched space.
- the circulating oxygen exhaust device 20 is connected to the oxygen-enriched space, and the oxygen-enriched space can receive the oxygen-enriched gas discharged from the fresh-keeping chamber 10, so that the oxygen content of the oxygen-enriched space is increased.
- the oxygen-enriched space can store meat ingredients, and by increasing the oxygen content in the oxygen-enriched space, the fresh-keeping color of the meat stored in the oxygen-enriched space can be more vivid.
- FIG. 2 is a schematic structural diagram of an embodiment of the circulating oxygen exhaust device 20 of the present application.
- the circulating oxygen exhaust device 20 includes an adsorption tower 21 .
- the adsorption tower 21 includes an air inlet, an air outlet and an oxygen outlet.
- the air inlet of the adsorption tower 21 is connected to the fresh-keeping chamber 10, and the air outlet of the adsorption tower 21 is connected to the fresh-keeping chamber 10.
- the gas in the fresh-keeping chamber 10 enters the adsorption tower 21 through the air inlet of the adsorption tower 21, and the adsorption tower 21 is opposite to the air inlet of the adsorption tower 21.
- the gas in the fresh-keeping chamber 10 in the interior is discharged for oxygen, and the oxygen-discharged gas is returned to the fresh-keeping chamber 10 through the air outlet of the adsorption tower 21, and the filtered oxygen is discharged through the oxygen discharge port.
- the circulating oxygen exhaust device 20 may further include an air pump 22 .
- the air pump 22 includes an air inlet and an air outlet, and the air inlet of the air pump 22 is communicated with the fresh-keeping chamber 10 .
- the air outlet of the air pump 22 is connected to the air inlet of the adsorption tower 21.
- the air pump 22 pressurizes and transmits the air of the fresh-keeping chamber 10 to the adsorption tower 21, and the adsorption tower 21 discharges oxygen and returns the air pressurized by the air pump 22 to the fresh-keeping tower 21.
- the air in the fresh-keeping chamber 10 is deoxygenated through the air pump 22 and the adsorption tower 21, so as to reduce the oxygen content of the gas in the fresh-keeping chamber 10, thereby realizing oxygen control and fresh-keeping.
- the circulating oxygen exhaust device 20 may further include an air pump housing 23, and the air pump 22 is completely sealed in the air pump housing 23, so as to shield the noise generated by the operation of the air pump 22 through the air pump housing 23, to reduce noise.
- the air pump 22 can be fixed in the air pump housing 23 through the rubber pad 24, so as to reduce the vibration of the air pump 22 during operation through the rubber pad 24, thereby achieving the effect of reducing the vibration sound and effectively reducing the noise.
- the air pump 22 can be vertically fixed inside the air pump housing 23 , and the upper end and the lower end of the air pump 22 are positioned and fixed by a rubber pad 24 respectively. Wherein, the hardness of the rubber pad 24 may be 27-39°, for example, may be 30° or 35°.
- the gas in the fresh-keeping chamber 10 can be cyclically exhausted through the circulating oxygen-exhausting device 20, so as to continue to operate within the cycle time, so that the gas in the fresh-keeping chamber 10 can be continuously exhausted during the cycle time.
- the adsorption tower 21 in order to gradually reduce the oxygen content of the gas in the fresh-keeping chamber 10, so that the adsorption tower 21 does not need to remove a large amount of oxygen from the pressurized gas at one time, and each time the adsorption tower 21 can remove a smaller amount of the pressurized gas.
- Oxygen is discharged, and the oxygen content of the gas in the fresh-keeping chamber 10 can be reduced to a lower level through repeated oxygen discharges, so that the air pump 22 may not pressurize the air of the fresh-keeping chamber 10 to a higher pressure value, and then the present application
- a small air pump 22 can be used to reduce the noise caused by oxygen control and preservation.
- the intake flow rate of the air pump inlet is 3L/min
- the air outlet flow rate of the oxygen exhaust port is 0.1L/min
- 3L of original gas will be extracted from the fresh-keeping chamber in the first minute after the circulating oxygen exhaust device is turned on, and then the 0.1L of high oxygen gas is discharged from the oxygen outlet, and 2.9L of residual gas is discharged from the outlet of the adsorption tower to the fresh-keeping room.
- the 2.9L of residual gas will be mixed with other gases in the fresh-keeping room to be circulated and discharged.
- the oxygen device exhausts oxygen again; the second minute after the circulating oxygen exhaust device is turned on, 3L of gas composed of residual gas and the original gas of the fresh-keeping chamber will be extracted from the fresh-keeping chamber, and 0.1L of high-oxygen gas will also be discharged from the oxygen exhaust port.
- 3L of gas composed of residual gas and the original gas of the fresh-keeping chamber will be extracted from the fresh-keeping chamber, and 0.1L of high-oxygen gas will also be discharged from the oxygen exhaust port.
- the oxygen content is reduced to a lower level.
- the circulating oxygen exhaust device 20 is used to return the gas exhausted by the circulating oxygen exhaust device 20 to the fresh-keeping chamber 10, and is used to clean the oxygen-exhausted gas in the fresh-keeping chamber 10. Oxygenate again.
- the air pump 22 can be used to pressurize and supply the air extracted from the fresh-keeping chamber 10 and/or the oxygen-exhausted gas to the adsorption tower 21, and the adsorption tower 21 is used to pressurize the air and/or the air pressurized by the air pump 22.
- the deoxygenated gas is deoxygenated, and the deoxygenated gas is supplied to the fresh-keeping chamber 10 again.
- the gas in the fresh-keeping chamber 10 provided with the one-way valve is circulated and exhausted.
- a small amount of outside air is added to the valve into the fresh-keeping chamber 10, so that only a small amount of oxygen is added into the fresh-keeping chamber 10, which will not have a great impact on reducing the oxygen content of the gas in the fresh-keeping chamber 10, which can not only ensure fresh-keeping
- the pressure of the chamber 10 is balanced, and the oxygen content of the gas in the fresh-keeping chamber 10 can be reduced to a lower level by circulating oxygen efficiently.
- the present application can discharge oxygen from the air in the fresh-keeping chamber 10 by adsorbing nitrogen and excluding oxygen in the adsorption tower 21, wherein, when the adsorption tower 21 is adsorbed, nitrogen is adsorbed, and the fresh-keeping chamber pressurized by the air pump 22 is filtered out.
- the oxygen in the gas in 10 is discharged from the oxygen outlet of the adsorption tower 21; when the adsorption tower 21 is desorbed, the residual gas that removes oxygen is released, and the residual gas is returned to the preservation through the air outlet of the adsorption tower 21.
- the pressure swing adsorption oxygen production technology is reversely applied to the circulating oxygen exhaust device 20.
- the oxygen generator does not use oxygen, and the present application does not need to extract high-purity oxygen, so that the circulating oxygen exhaust device 20 does not need to extract high-purity oxygen.
- the air pump 22 does not need to pressurize the gas in the fresh-keeping chamber 10 to a relatively high pressure in order to obtain the gas with extremely high oxygen content, and does not need to extract oxygen at one time, and the fresh-keeping chamber 10 can be discharged by the method of continuous circulation of oxygen.
- the air pump 22 can pressurize the gas in the fresh-keeping chamber 10 to a lower pressure, for example, to 0.03 MPa to 0.10 MPa, so that the small air pump 22 can reduce the oxygen content of the gas in the fresh-keeping chamber 10 to a lower level to achieve
- the miniaturization of the circulating oxygen exhaust device 20 realizes low-pressure separation, thereby fundamentally reducing the noise caused by oxygen control and preservation, and reducing the power consumption of the air pump 22, so that the air pump 22 will not generate excessive heat and affect the life of the air pump 22.
- the gas in the fresh-keeping chamber 10 is circulated and exhausted by means of the adsorption tower 21 adsorbing nitrogen and removing oxygen, which can effectively reduce the oxygen content of the gas in the fresh-keeping chamber 10 .
- the method of adsorbing nitrogen through the adsorption tower 21 to exhaust oxygen in the present application can exhaust about 70%-93% of the oxygen in the fresh-keeping chamber 10, The oxygen discharge efficiency is high, and there is no need to supplement a large amount of air outside the fresh-keeping chamber 10, thereby ensuring the oxygen discharge efficiency.
- the present application may discharge oxygen to the air in the fresh-keeping chamber 10 by means of the adsorption tower 21 adsorbing oxygen and removing oxygen.
- the adsorption tower 21 adsorbs oxygen, filters out the remaining gas after removing the oxygen, and returns the remaining gas after removing the oxygen to the fresh-keeping chamber 10 through the air outlet of the adsorption tower 21; when the adsorption tower 21 desorbs, it releases the adsorbed gas. oxygen, and the oxygen is discharged through the oxygen outlet of the adsorption tower 21 .
- the present application can also place the electrolytic membrane etc. in the adsorption tower 21, so as to consume the oxygen of the air in the fresh-keeping chamber 10 through the electrolytic membrane, etc., and return the residual gas after the oxygen is discharged to the fresh-keeping through the air outlet of the adsorption tower 21 Room 10.
- the following content will describe in detail the circulating oxygen exhaust device 20 of the adsorption tower 21 that uses adsorbed nitrogen to realize oxygen exhaust. It can be understood that, the following at least part of the scheme can also be applied to the circulating oxygen exhaust device 20 of the adsorption tower 21 using adsorbed oxygen to realize oxygen exhaust and the adsorption tower 21 using electrolytic membrane to realize oxygen exhaust after the equivalent structural transformation.
- the circulating oxygen exhaust device 20 and so on will describe in detail the circulating oxygen exhaust device 20 of the adsorption tower 21 that uses adsorbed nitrogen to realize oxygen exhaust.
- the valve assembly 25 can be used to switch the adsorption and desorption states of the adsorption tower 21 in the present application.
- the air outlet of the air pump 22 is connected, and the air outlet of the adsorption tower 21 can be communicated with the fresh-keeping chamber 10 through the air outlet passage of the valve assembly 25.
- the air pump 22 will The air in the fresh-keeping chamber 10 is pressurized and transmitted to the adsorption tower 21 through the intake passage of the valve assembly 25.
- the adsorption tower 21 is in the adsorption state.
- the adsorption tower 21 adsorbs nitrogen in the air, filters out the oxygen in the air, and makes the oxygen from the adsorption tower
- the oxygen outlet of 21 is discharged; when the air inlet passage of the valve assembly 25 is closed and the air outlet passage of the valve assembly 25 is opened, the air pump 22 stops pressurizing and transporting air to the adsorption tower 21, the adsorption tower 21 is in a desorption state, and the adsorption tower 21 releases the excess air.
- the gas is discharged to the fresh-keeping chamber 10 through the gas outlet of the adsorption tower 21 and the gas outlet channel of the valve assembly 25 .
- valve assembly 25 of the present application may include a first valve 251 and a second valve 252 , wherein the outlet passage is arranged in the first valve 251 and the inlet passage is arranged in the second valve 252 .
- the air outlet passage and the air inlet passage can also be provided in the same valve assembly 25 .
- At least two adsorption towers 21 can be arranged in the circulating oxygen exhaust device 20 , and the air in the fresh-keeping chamber 10 can be continuously cleaned by the at least two adsorption towers 21 .
- Oxygen is discharged, and the residual gas adsorbed by the adsorption tower 21 can be continuously desorbed into the fresh-keeping chamber 10, so as to control the oxygen content in the fresh-keeping chamber 10 with high efficiency and low time consumption.
- the at least two adsorption towers 21 may include a first adsorption tower 21 and a second adsorption tower 21 .
- the first valve 251 has a first inlet channel corresponding to each first adsorption tower 21, corresponding to each second adsorption tower 21 has a second inlet channel;
- the second valve 252 has a first outlet channel corresponding to each first adsorption tower 21 , and a second outlet channel corresponding to each second adsorption tower 21 .
- the first air inlet passage and the second air inlet passage in the first valve 251 are alternately opened, and the second air outlet passage and the first air outlet passage are alternately opened, and when the first air inlet passage is opened, the first air outlet passage is controlled to close and the second air outlet passage is controlled.
- the outlet channel is opened, and when the second inlet channel is opened, the second outlet channel is controlled to be closed and the first outlet channel is controlled to be opened, so that when one of the first adsorption tower 21 and the second adsorption tower 21 is adsorbed, it will be The remaining gas desorbed from the other one of the first adsorption tower 21 and the second adsorption tower 21 flows into the fresh-keeping chamber 10 through the gas outlet channel, so as to control the oxygen content in the fresh-keeping chamber 10 with high efficiency and low time consumption.
- the number of adsorption towers 21 is two.
- the first valve 251 and the second valve 252 are both two-position three-way solenoid valves, and the opening and closing of the first air outlet channel and the second air outlet channel inside the first valve 251 can be freely switched through the two-position three-way electromagnetic valve, or The opening and closing of the first intake channel and the second intake channel inside the second valve 252 can be freely switched, so as to switch the working states of the two adsorption towers 21, so that the first adsorption tower 21 and the second adsorption tower 21 can be switched.
- the residual gas desorbed from the other one of the first adsorption tower 21 and the second adsorption tower 21 flows into the fresh-keeping chamber 10 through the gas outlet channel, so that the first valve 251, the The operation of the second valve 252 and the air pump 22 can continuously discharge oxygen from the air in the fresh-keeping chamber 10, and can continuously desorb and transmit the residual gas adsorbed by the adsorption tower 21 into the fresh-keeping chamber 10, which is efficient and time-consuming.
- the oxygen content in the fresh-keeping chamber 10 is controlled.
- the adsorption tower 21 may be provided with adsorption substances.
- the adsorption capacity of the adsorption material for nitrogen is greater than the adsorption capacity for oxygen.
- the adsorption material arranged in the adsorption tower 21 may be zeolite molecular sieve particles.
- the polarity of nitrogen in the air is larger than that of oxygen.
- Zeolite molecular sieves have different adsorption capacities for oxygen and nitrogen components in the air. Nitrogen can be preferentially adsorbed from the air through zeolite molecular sieves, and the oxygen in the air can be filtered out.
- the size of the zeolite molecular sieve particles may be 0.4 mm ⁇ 0.8 mm, for example, may be 0.5 mm, 0.6 mm, 0.7 mm.
- the adsorption material set in the adsorption tower 21 may also be a silicoaluminophosphate molecular sieve.
- the oxygen content of the fresh-keeping chamber 10 is controlled by the adsorption and desorption of the adsorption tower 21. Since the adsorption material has the characteristic that the adsorption amount increases with the increase of the partial pressure of the adsorbed component, this embodiment completes the adsorption and desorption through the pressure change.
- the air separation is realized by attaching, that is, the adsorption tower 21 is in the adsorption or desorption state through the pressure change.
- the pressure of the air is increased by the air pump 22, so that the air becomes compressed air, and then the compressed air is introduced into the adsorption tower 21, and the pressure in the adsorption tower 21 is increased in a disguised form, so that the adsorption tower 21 is in the adsorption tower 21.
- the adsorption tower 21 filters out at least part of the oxygen in the compressed air, when the air pump 22 no longer transmits the compressed air into the adsorption tower 21, the pressure of the adsorption tower 21 is reduced, and the adsorption tower 21 absorbs nitrogen and other substances.
- the adsorption tower 21 When the adsorption capacity is reduced, the adsorption tower 21 will desorb the adsorbed substances, and flow into the fresh-keeping chamber 10 through the air inlet of the adsorption tower 21 and the air outlet channel of the second valve 252, that is, the adsorption tower 21 will be desorbed.
- the residual gas flows into the first fresh-keeping chamber 10, so that the oxygen content in the fresh-keeping chamber 10 is reduced, and oxygen control and fresh-keeping can be realized.
- the air pump 22 can pressurize the air to 0.03MPa-0.2MPa, so as to ensure that the adsorption tower 21 can filter out at least part of the oxygen in the compressed air under this pressure.
- the air pump 22 can pressurize the air to 0.03MPa ⁇ 0.10MPa, such as 40KPa, 60KPa, 75KPa, etc., so that the small air pump 22 can circulate for many times.
- the oxygen exhaust reduces the oxygen content of the gas in the fresh-keeping chamber 10 to a lower level, and realizes low-pressure separation, thereby fundamentally reducing the noise caused by oxygen control and fresh-keeping.
- the corresponding relationship between the particle size of the zeolite molecular sieve and the pressurization of the air by the air pump 22 can realize the miniaturization of the air pump 22, reduce the power consumption of the circulating oxygen exhaust device 20, and reduce the noise.
- the particle size of the zeolite molecular sieve is too small, the airflow transmission resistance will be too large, and the pressure needs to be appropriately increased. Therefore, the particle size of the zeolite molecular sieve filled in the adsorption tower 21 should be relatively uniform and moderate.
- the size of the zeolite molecular sieve particles is set to 0.4 mm to 0.8 mm, and the pressure in the adsorption tower 21 is 0.03 MPa to 0.10 MPa. Therefore, the air pump 22 does not need to increase excessive pressure on the air, the miniaturization of the air pump 22 can be realized, the power consumption of the circulating oxygen exhaust device 20 can be reduced, and the noise can be reduced.
- the adsorption tower 21 can be cylindrical, and with the cylindrical adsorption tower 21, under the condition of the same floor space, the cylindrical volume is larger, more zeolite molecular sieves can be accommodated, and the air flow is smoother evenly.
- the adsorption tower 21 may also have other regular or irregular shapes such as a cube, a cuboid, and the like.
- the adsorption capacity of the adsorption tower 21 can be controlled by controlling the size of the adsorption tower 21.
- the adsorption capacity of the adsorption tower 21 can be ensured and a small volume can be maintained.
- the tower 21 and the zeolite molecular sieve can be matched to a small air pump 22, and the air pump 22 and the adsorption tower 21 can be integrated together, which can realize the optimization of the overall structure.
- the diameter of the adsorption tower 21 may range from 20mm to 40mm.
- the height range of the adsorption tower 21 can be 100mm-160mm, to avoid that the volume of the adsorption tower 21 is too large and the air pump 22 needs a higher working pressure, and it also avoids that the volume of the adsorption tower 21 is too small to filter a small amount of gas.
- the removal of residual gas leads to low oxygen discharge efficiency, which can also ensure that the gas with a transmission flow of 30KPa-100KPa of 3L/min ⁇ 15L/min enters the adsorption tower 21 of this size. filtration efficiency.
- the diameter of the adsorption tower 21 may be 20mm, 24mm, 29mm, 32mm or 37mm.
- the height of the adsorption tower 21 may be 120mm, 135mm, 140mm, 150mm or 155mm.
- the transmission flow of the air pump 22 is also designed accordingly.
- the contact time between the molecules in the compressed air and the adsorbed substances in the adsorption tower 21 can be changed by changing the transmission flow of the air pump 22 , thereby changing the adsorption efficiency of the adsorption tower 21 for the compressed air. If the transmission speed is too fast, the contact time between the molecules in the compressed air and the adsorbent will be too short, which is not conducive to the adsorption of gas and reduces the adsorption rate; if the transmission speed is too low, the volume of the adsorption tower 21 will increase. Therefore, the transmission flow should be controlled within a certain range.
- the transmission flow of the air pump 22 is 3L/min ⁇ 15L/min, specifically 5L/min, 8L/min or 10L/min.
- the ratio of the transmission flow rate of the air pump 22 per second to the volume of the adsorption tower 21 may be 1.2 ⁇ 2.2.
- the gas outlet flow rate of the oxygen exhaust port is 0.1L/min ⁇ 0.5L/min, so that the circulating oxygen exhaust device 20 discharges oxygen-enriched gas at a small flow rate through the oxygen exhaust port, so that the oxygen exhaust gas in the circulating oxygen exhaust device 20 can pass through the oxygen exhaust port.
- the total amount of gas discharged from the oxygen exhaust port can be reduced, so as to ensure that the oxygen content of the gas exhausted from the oxygen exhaust port is relatively high, and to avoid the discharge of a large amount of non-oxygen gas through the oxygen exhaust port, and then The oxygen exhaust efficiency of the circulating oxygen exhaust device 20 to the fresh-keeping chamber 10 is ensured.
- the ratio of the outflow flow rate of the oxygen exhaust port to the intake air flow rate of the air intake port of the air pump 22 is 1/100 to 1/6.
- the circulating oxygen exhaust device 20 of the present application may further include a buffer tank 26, and the buffer tank 26 is used to buffer the residual gas discharged from the air outlet of the adsorption tower 21, thereby reducing the residual gas. air flow rate to reduce noise.
- the buffer tank 26 of the present application can be at least two buffer tanks 26 connected in sequence, the adsorption tower 21 is connected to the first buffer tank 26 through the gas outlet channel of the second valve 252, and the residual gas passes through the first buffer tank 26.
- the residual air realizes a buffer, and the residual air from the first buffer tank 26 enters the air inlet of the second buffer tank 26, and passes through the second buffer tank 26.
- tank 26 and then come out from the air outlet of the second buffer tank 26 to achieve secondary buffering, until it comes out from the air outlet of the last buffer tank 26 to achieve at least two buffers, so that the adsorption tower is buffered by at least two buffer tanks 26. 21
- the residual air discharged from the air outlet is buffered at least twice, and the buffered residual air is supplied to the fresh-keeping chamber 10 by the last buffer tank 26, so that the flow rate of the residual air is greatly reduced, which is greatly reduced because the residual air flow rate is too fast.
- the circulating oxygen exhaust device 20 includes a first buffer tank 261 and a second buffer tank 262. After the residual gas discharged from the adsorption tower 21 is buffered once by the first buffer tank 261, the residual gas enters the second buffer tank 261.
- the buffer tank 262 is used for secondary buffering of the residual gas through the second buffer tank 262, so as to reduce the flow rate of the residual gas and reduce noise.
- the buffer tank 26 may be cylindrical.
- the buffer tank 26 may also have other regular or irregular shapes such as a cube, a cuboid, and the like.
- the diameter of the buffer tank 26 may range from 20mm to 40mm.
- the height of the buffer tank 26 may range from 100mm to 160mm.
- the diameter of the air outlet and the air inlet of each buffer tank 26 is about 0.5-5mm, so as to reduce the flow rate of the residual air entering and leaving each buffer tank 26 by limiting the diameter of the air outlet and the air inlet of the buffer tank 26 , thereby Effectively buffer residual air.
- the circulating oxygen exhaust device 20 of the present application may further include an oxygen storage tank 27, and the air inlet of the oxygen storage tank 27 is connected to the oxygen exhaust port of the adsorption tower 21 through a valve, so that when the intake passage of the first valve 251 is opened, , the oxygen filtered by the adsorption tower 21 flows into the oxygen storage tank 27 through the oxygen outlet, and the flow rate of the oxygen entering the oxygen storage tank 27 from the adsorption tower 21 is controlled by the valve; and when the inlet passage of the first valve 251 is closed, The oxygen in the oxygen storage tank 27 flows into the adsorption tower 21 through the oxygen discharge port, and the oxygen in the gas storage tank is back flushed with the adsorption material in the adsorption tower 21, so that the adsorption tower 21 is desorbed and the residual gas passes through the outlet channel of the second valve 252. It is returned to the fresh-keeping chamber 10, and the flow rate of oxygen entering the adsorption tower 21 from the gas storage tank is controlled by a valve to control the flow rate
- the oxygen storage tank 27 may be cylindrical. Of course, the oxygen storage tank 27 may also have other regular or irregular shapes such as a cube, a cuboid, and the like.
- the diameter of the oxygen storage tank 27 may range from 20mm to 40mm.
- the height of the oxygen storage tank 27 may range from 100mm to 160mm.
- the valve may be a throttle.
- the diameter of the throttle may be 0.3-0.6mm, for example may be 0.4mm, 0.45mm or 0.56mm.
- the adsorption tower 21, the buffer tank 26 and the oxygen storage tank 27 can be composed of an integrated tank tower and bottom plate, so that the adsorption function, the buffer function and the oxygen storage function are integrated into one integrated part, so as to reduce the size of the adsorption tower 21, etc.
- the volume and weight of the constituted circulating oxygen exhaust device 20 The tank tower includes a plurality of cavities that constitute the adsorption tower 21, the buffer tank 26 and the oxygen storage tank 27, and the bottom plate is covered on the tank tower to seal the multiple cavities, and the multiple cavities are formed into mutually isolated adsorption towers 21, Buffer tank 26 and oxygen storage tank 27.
- the adsorption tower 21, the buffer tank 26 and the oxygen storage tank 27 can have the same height and are arranged side by side at the same level, which can ensure that the circulating oxygen exhaust device 20 is more compact, so as to realize the miniaturized design of the circulating oxygen exhaust device 20, and It is convenient for air distribution.
- the heights of the adsorption tower 21 , the buffer tank 26 and the oxygen storage tank 27 may be different, may not be arranged side by side, or may not be arranged at the same level.
- the adsorption tower 21, the buffer tank 26 and the oxygen storage tank 27 may have the same size.
- the sizes of the adsorption tower 21, the buffer tank 26 and the oxygen storage tank 27 may be different.
- the air inlet and air outlet of the adsorption tower 21 are arranged at the top of the adsorption tower 21, and the oxygen outlet is arranged at the bottom end of the adsorption tower 21; the air inlet and the air outlet of the buffer tank 26 are both arranged at the top of the buffer tank 26; The air inlet of the oxygen tank 27 is arranged at the bottom end of the oxygen storage tank 27 to facilitate the arrangement of pipelines and to reduce the volume of the circulating oxygen exhaust device 20 constituted by the adsorption tower 21 and the like.
- the adsorption tower 21 , the buffer tank 26 and the oxygen storage tank 27 can form a concave structure, and the air pump housing 23 can be embedded in the concave structure, so as to reduce the leakage of the circulating oxygen exhaust device 20 composed of the adsorption tower 21 and the like. volume.
- a gas path can be provided between the air pump 22 , the fresh-keeping chamber 10 and the adsorption tower 21 .
- the air inlet of the air pump 22 is connected to the fresh-keeping chamber 10 through the fourth air passage 284 , the air outlet of the air pump 22 is connected to the air inlet passage of the first valve 251 through the fifth air passage 285 , and the air inlet passage of the first valve 251
- the third air passage 283 is connected to the air inlet of the adsorption tower 21, the air outlet of the adsorption tower 21 is connected to the air outlet passage of the second valve 252 through the first air passage 281, and the air outlet passage of the second valve 252 passes through the second air passage 282 is connected to the first buffer tank 26, the adjacent two buffer tanks 26 are connected through the sixth gas path 286, the last buffer tank 26 is connected to the fresh-keeping chamber 10 through the seventh gas path 287, and the oxygen outlet of the adsorption tower 21 passes through
- the eighth air passage 288 is communicated with the air inlet of the oxygen storage tank 27 , and the air outlet of the oxygen storage tank 27 is discharged through the ninth air passage 289 .
- the above-mentioned first gas path 281 to ninth gas path 289 can be designed as independent gas pipes.
- the arrangement of gas pipes is troublesome, and the adsorption tower 21, the gas pump 22, and the gas path are also troublesome.
- the circulating oxygen exhaust device 20 composed of the same composition is larger in size, so that at least part of the gas path can be placed in a gas path plate 280, so that the main gas path is designed as a gas path board 280, and there is no need for multiple air pipes to connect to realize the gas path.
- the road is tidy, and the manufacturing process of the circulating oxygen exhaust device 20 can be simplified and the number of fixing parts for fixing multiple air pipes can be reduced, so that the assembly efficiency of the circulating oxygen exhaust device 20 can be improved and the manufacturing cost of the circulating oxygen exhaust device 20 can be reduced.
- the trachea can be a soft rubber trachea or a hard trachea.
- the third air passage 283 , the first air passage 281 and the second air passage 282 may be arranged in the air passage plate 280 .
- the air inlet and outlet of the adsorption tower 21 and the air inlet and outlet of the buffer tank 26 can be arranged towards the gas passage plate 280, so that the gas can be stored in the gas passage plate 280 and the second valve 252 through the gas passage plate 280 and the second valve 252.
- Flow between the adsorption tower 21 and the buffer tank 26 can reduce the length of the sixth gas path 286 .
- the gas passage plate 280 can be arranged at the top of the adsorption tower 21 , the buffer tank 26 and the oxygen storage tank 27 .
- the first valve 251 and the second valve 252 can be arranged between the gas circuit plate 280 and the gas pump 22 to improve the compactness of the circulating oxygen exhaust device 20 formed by the adsorption tower 21 and the like, so as to reduce the circulating oxygen exhaust device. 20 volumes.
- the oxygen outlet of the adsorption tower 21 and the air inlet of the oxygen storage tank 27 face away from the side of the air pump 22, so there is no need to set the eighth gas path 288 between the adsorption tower 21 and the air pump 22, so that the adsorption tower 21, The air pump 22 , the oxygen storage tank 27 and the buffer tank 26 are more compact.
- the circulating oxygen exhaust device 20 may further include a control device.
- the control device can be electrically connected with the air pump 22 and the valve assembly 25 , can control the operation of the air pump 22 , and can also control the opening and closing of the air inlet passage and the air outlet passage in the valve assembly 25 .
- control device may include an oxygen detector.
- the oxygen detector can be used to detect the oxygen content of the fresh-keeping chamber 10 , and the control device controls the operation of the air pump 22 and the valve assembly 25 based on the oxygen content of the fresh-keeping chamber 10 .
- the air pump 22 and the valve assembly 25 can be controlled, and the oxygen content in the fresh-keeping chamber 10 can be controlled jointly by the air pump 22, the valve assembly 25 and the adsorption tower 21 , so that the oxygen content of the fresh-keeping chamber 10 is reduced.
- the air pump 22 can be controlled to stop running, that is, the oxygen content of the fresh-keeping chamber 10 is no longer controlled by the air pump 22 , the valve assembly 25 and the adsorption tower 21 .
- control device may further include an opening and closing detector, which is used to detect whether the fresh-keeping chamber 10 is opened, and the control device may control the operation of the air pump 22 and the valve assembly 25 based on the opening and closing of the fresh-keeping chamber 10 .
- the opening and closing detector detects that the fresh-keeping chamber 10 is not opened, the air pump 22 and the valve assembly 25 can be controlled, and the oxygen content in the fresh-keeping chamber 10 can be controlled through the joint action of the air pump 22, the valve assembly 25 and the adsorption tower 21, and the fresh-keeping chamber 10 contains The amount of oxygen decreases, and when the opening and closing detector detects that the fresh-keeping chamber 10 is opened, the air pump 22 and the valve assembly 25 can be controlled to stop working.
- the opening and closing detector may be any one of a light sensor, an infrared sensor, and a magnetic control switch, so as to realize the opening and closing detection of the fresh-keeping chamber 10 .
- control device can also be set to reduce the oxygen content of the fresh-keeping chamber 10 through the air pump 22 , the first valve 251 , the second valve 252 and the adsorption tower 21 every day.
- the air pump 22, the first valve 251, the second valve 252 and the adsorption tower 21 are controlled to reduce the oxygen content of the fresh-keeping chamber 10 every day from 9:00 to 12:00 and from 14 to 16:00, and stop at the rest of the time.
- start the cycle for 2 hours and stop for 4 hours every day start the cycle for 2 hours and stop for 4 hours every day.
- FIG. 7 is a schematic structural diagram of a circulating oxygen exhaust device 20 according to another embodiment of the present application.
- the circulating oxygen exhaust device 20 in this embodiment includes two adsorption towers 21 , an oxygen storage tank 27 , two buffer tanks 26 , an air pump 22 and a valve assembly 25 .
- the valve assembly 25 is a two-position five-way valve.
- the air inlet of the air pump 22 is communicated with the fresh-keeping chamber 10 through the fourth air passage 284, the air outlet of the air pump 22 is communicated with the air inlet passage of the valve assembly 25 through the fifth air passage 285, and the air inlet passage of the valve assembly 25 passes through the third air passage.
- Path 283 is connected to the air inlet of adsorption tower 21, the air outlet of adsorption tower 21 is connected to the air outlet channel of valve assembly 25 through first air passage 281, and the air outlet passage of valve assembly 25 is connected to the first buffer through second air passage 282.
- the sixth gas path 286 two adjacent buffer tanks 26 are communicated through the sixth gas path 286, the last buffer tank 26 is communicated with the fresh-keeping chamber 10 through the seventh gas path 287, and the oxygen outlet of the adsorption tower 21 is communicated with the eighth gas path 288.
- the air inlet of the oxygen storage tank 27 and the air outlet of the oxygen storage tank 27 are discharged through the ninth air passage 289 .
- the first air passage 281 to the ninth air passage 289 are all designed as air pipes that are independent of each other.
- the adsorption tower 21, the buffer tank 26 and the oxygen storage tank 27 are all cylindrical, have the same height, and are arranged side by side at the same level.
- the valve assembly 25 is disposed at the bottom end of the buffer tank 26 .
- the air pump 22 is arranged on the side of the valve assembly 25 facing away from the adsorption tower 21 .
- the air inlet and the air outlet of the adsorption tower 21 are arranged at the bottom end of the adsorption tower 21 , and the oxygen exhaust port is arranged at the top end of the adsorption tower 21 .
- the air inlet of the first buffer tank 261 is disposed at the bottom end of the first buffer tank 261 .
- the air outlet of the first buffer tank 261 is disposed at the top of the first buffer tank 261 .
- the air inlet and the air outlet of the second buffer tank 262 are both disposed at the top of the second buffer tank 262 .
- the air inlet and the air outlet of the oxygen storage tank 27 are both arranged at the top of the oxygen storage tank 27 .
- the air outlet of the air pump 22 is disposed toward the valve assembly 25 .
- the circulating oxygen exhaust device 20 of the present application includes an air pump 22 and an adsorption tower 21.
- the circulating oxygen exhaust device 20 operates continuously during the cycle time to continuously exhaust the gas in the fresh-keeping chamber 10, so as to gradually reduce the gas in the fresh-keeping chamber 10. Therefore, the adsorption tower 21 does not need to remove a large amount of oxygen from the pressurized gas at one time, and the adsorption tower 21 can discharge a small amount of oxygen in the pressurized gas each time.
- Oxygen can reduce the oxygen content of the gas in the fresh-keeping chamber 10 to a lower level, so that the air pump can also not pressurize the air in the fresh-keeping chamber 10 to a higher pressure value, and then the application can use a small air pump to reduce oxygen control and fresh-keeping. noise.
- the fresh-keeping chamber 10 can also be provided with a one-way valve, which is convenient for opening the fresh-keeping chamber.
- the one-way valve makes the outer wall of the fresh-keeping chamber 10 not need to bear a large pressure, so there is no need to require the material for making the outer wall of the fresh-keeping chamber 10 to have high pressure.
- the strength or the use of complex and special structure reduces the application cost; and through the circulating oxygen exhaust device 20, the gas in the fresh-keeping chamber 10 provided with the one-way valve is circulated and exhausted, and the air pump can only extract a relatively small amount of fresh-keeping per unit time.
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Abstract
一种循环排氧装置（20）和厨房电器（1）。该循环排氧装置（20）包括气泵（22）和吸附塔（21），气泵（22）的进气口连通于保鲜室（10），吸附塔（21）包括进气口、出气口和排氧口，吸附塔（21）的进气口连通于气泵（22）的出气口，吸附塔（21）的出气口连通于保鲜室（10）；其中，气泵（22）在循环时间内持续运作，以对保鲜室（10）持续排氧。
Description
本申请涉及家电技术领域，特别涉及一种循环排氧装置和厨房电器。
长途运输中、仓储中的果蔬保鲜中，减少氧气充氮保鲜一直以来在国内外都得于广泛运用。但是，在家电领域，由于技术的局限性，例如排氧效率低，未能具体有效运用。
【发明内容】
本申请提供一种循环排氧装置和厨房电器，以解决现有技术中冰箱内排氧效率低的技术问题。
为解决上述技术问题，本申请采用的一个技术方案是提供一种循环排氧装置，该循环排氧装置用于对保鲜室进行排氧，该循环排氧装置包括气泵和吸附塔：
气泵的进气口连通于保鲜室；
吸附塔包括进气口、出气口和排氧口，吸附塔的进气口连通于气泵的出气口，吸附塔的出气口连通于保鲜室；
其中，气泵在循环时间内持续运作，以对保鲜室持续排氧。
其中，循环排氧装置用于将排氧后的余气返还至保鲜室，且用于对保鲜室内的余气进行循环排氧，以降低保鲜室含氧量。
其中，循环排氧装置用于将保鲜室的空气进行排氧，并将排氧后的余气返还至保鲜室；接着从保鲜室抽取余气和空气的混合物，以对混合物进行排氧，并再将排氧后的余气返还至保鲜室，以待被循环排氧装置再次排氧，如此循环往复，以实现循环排氧装置在循环时间内对保鲜室进行持续排氧。
其中，气泵的进气口的进气流量为3L/min～10L/min，排氧口的出气流量为0.1L/min～0.5L/min。
其中，气泵的压力为30KPa～100KPa。
其中，循环排氧装置包括至少两个缓冲罐，至少两个缓冲罐依次连通，至少两个缓冲罐中的第一个缓冲罐的进气口连通于吸附塔的出气口，最后一个缓 冲罐的出气口连通于保鲜室。
其中，循环排氧装置包括阀门组件，气泵的出气口通过阀门组件的进气通道连通于吸附塔的进气口，吸附塔的出气口通过阀门组件的出气通道连通于保鲜室。
其中，循环排氧装置包括储氧罐，吸附塔的排氧口连通于储氧罐。
其中，吸附塔、缓冲罐和储氧罐均为圆柱形，具有相同的高度，且并排设置于同一水平高度。
其中，吸附塔、缓冲罐和储氧罐的直径均为20mm～40mm，高度均为100mm～160mm；
吸附塔中设置有沸石分子筛颗粒，沸石分子筛颗粒的尺寸为0.4mm～0.8mm。
其中，吸附塔、缓冲罐和储氧罐由一体式的罐塔和底板构成，罐塔包括构成吸附塔、缓冲罐和储氧罐的多个腔体、底板盖设于罐塔以密封多个腔体，并使多个腔体分别形成相互隔离的吸附塔、缓冲罐和储氧罐。
其中，吸附塔的进气口和出气口设置于吸附塔的顶端，排氧口设置于吸附塔的底端；缓冲罐的进气口和出气口均设置于缓冲罐的顶端；储氧罐的进气口设置于储氧罐的底端；
循环排氧装置包括气路板，设置于吸附塔、缓冲罐和储氧罐的顶端；气路板上形成有第一气路、第二气路和第三气路，第一气路连通吸附塔的出气口和阀门组件的出气通道，第二气路连通阀门组件的出气通道和第一缓冲罐；第三气路连通阀门组件的进气通道和吸附塔的进气口。
其中，循环排氧装置还包括控制设备，控制设备连接于阀门组件，
控制设备控制阀门组件进气通道开启，使气泵将保鲜室的空气加压传输至吸附塔，吸附塔过滤出空气中的氧气，由吸附塔的出气口排出，并吸附余气；控制设备控制阀门组件的进气通道关闭，使气泵停止向吸附塔加压传输空气，吸附塔释放余气，经由吸附塔的进气口及阀门组件的出气通道排至保鲜室。
其中，控制设备包括氧气检测器，用于检测保鲜室的含氧量，控制设备基于保鲜室的氧含量控制气泵和阀门组件的运行；和/或，
控制设备包括开合检测器，用于检测保鲜室的启闭情况，控制设备基于保鲜室的启闭情况控制气泵和阀门组件的运行。
其中，吸附塔包括两个，两个吸附塔分为第一吸附塔和第二吸附塔；阀门 组件对应每一第一吸附塔具有一第一进气通道和一第一出气通道，对应每一第二吸附塔具有一第二进气通道和一第二出气通道；交替控制阀门组件中第一进气通道开启和第二进气通道关闭，或者第一出气通道关闭和第二出气通道开启。
为解决上述技术问题，本申请采用的一个技术方案是提供一种厨房电器，该厨房电器包括上述循环排氧装置，该循环排氧装置连通于厨房电器内的保鲜室；
保鲜室设置有单向阀，保鲜室外部的空气能够通过单向阀进入内部。
本申请的循环排氧装置包括气泵和吸附塔；循环排氧装置在循环时间内持续运作，对保鲜室内的气体进行持续排氧，以逐步降低保鲜室内气体的含氧量，从而吸附塔无需一次性地从加压过的气体排除大量的氧，每次吸附塔可以将加压过的气体中较少量的氧排出，通过循环的多次排氧可以将保鲜室内的气体的含氧量降低到较低水平，使得气泵也可不将保鲜室的空气加压到较高压力值，进而本申请可以使用小型气泵，以降低控氧保鲜带来的噪音；并且通过循环排氧装置对设置有单向阀的保鲜室内的气体进行循环排氧，气泵每单位时间可以只抽取相对较少的保鲜室内的气体，从而只需要通过单向阀补充少量的外界空气到保鲜室中，从而只会有少量的氧气补充进保鲜室内，对降低保鲜室内气体的含氧量不会造成较大影响，这样既可以保证保鲜室压力平衡，又可以高效地通过循环排氧将保鲜室内气体的含氧量降低至较低水平。
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图，其中：
图1是本申请一实施例厨房电器的结构示意图；
图2是本申请一实施例循环排氧装置的分解示意图；
图3是本申请一实施例循环排氧装置中气泵的安装示意图；
图4是本申请一实施例循环排氧装置中气体流动示意图；
图5是本申请一实施例循环排氧装置中气路示意图；
图6是本申请一实施例循环排氧装置中气路板示意图；
图7是本申请另一实施例循环排氧装置的结构示意图。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，均属于本申请保护的范围。
需要说明，若本申请实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其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”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
请参阅图1所示，厨房电器1包括保鲜室10和循环排氧装置20。循环排氧装置20对保鲜室10内的气体进行排氧并重新返还至保鲜室10，通过循环排氧装置20对保鲜室10内的气体进行排氧，以降低保鲜室10内气体的氧含量，从而实现控氧保鲜。通过本申请的循环排氧装置20可以将保鲜室10内气体70％～93％的氧排除。
其中，本申请的厨房电器1可以是冰箱、烤箱或果汁机等需要通过降低氧含量实现保鲜的家用电器。
例如，烤箱包括烘烤腔以及循环排氧装置20，其中，可将烤箱的烘烤腔作为保鲜室10，循环排氧装置20连通于烘烤腔，以通过循环排氧装置20将烘烤腔内气体的含氧量控制在较低水平，以在对果蔬进行烘烤时对果蔬进行保鲜，防止果蔬氧化变色。
又例如，果汁机包括榨汁腔以及循环排氧装置20，其中，可将果汁机的榨汁腔作为保鲜室10，循环排氧装置20连通于榨汁腔，以通过循环排氧装置20将榨汁腔内气体的含氧量控制在较低水平，以在对果蔬进行榨汁时对果蔬进行 保鲜，防止果蔬氧化导致果汁变色。优选地，循环排氧装置20可与榨汁腔顶端的开口相连通。另外，循环排氧装置20可在果汁机装料后和榨汁前对果汁机的榨汁腔内的气体进行排氧。
保鲜室10可以是非密闭空间。保鲜室10可通过单向阀连通于外界空气，其中，在循环排氧装置20从保鲜室10抽取气体导致保鲜室10气压低于保鲜室10外界的气压时，保鲜室10外的空气会通过单向阀进入保鲜室10，以使保鲜室10保持常压，这样保鲜室10内外不会存在较大的压力差，使保鲜室10更容易打开，使得保鲜室10的外壁无需承受较大的压力，因此无需要求制作保鲜室10的外壁的材料具有较高的强度或采用复杂特殊的结构，降低了保鲜室10的制作成本；并且保鲜室10内的富氮气体不会通过单向阀向保鲜室10外流动，可以避免外界过多的氧进入保鲜室10，以保证排氧效率。其中，单向阀是自动工作的，在从外界向保鲜室10流动的气体压力作用下，单向阀内的阀瓣打开；而气体反方向流动时，即气体从保鲜室10流到保鲜室10外时，由从保鲜室10向外界流动的气体的压力和阀瓣的自重合阀瓣作用于阀座，从而切断流动。
当然，在其他实施例中，保鲜室10可以是密闭空间，从而保鲜室10内空气不与大气相连通，进而可以通过去除保鲜室10内部的空气中的至少部分氧气且重新将去除氧气后的空气返还到保鲜室10内，可以使保鲜室10的含氧量降低，可以实现控氧保鲜；并可使保鲜室10内空气总含量降低，使保鲜室10内空气处于负压状态，实现负压保鲜，即可以实现控氧保鲜和负压保鲜的双重保鲜效果，从而实现更好的保鲜效果。
保鲜室10可以设置一个或多个。保鲜室10可以是存储蔬菜、水果类等食材的保鲜室10。通过将保鲜室10的含氧量控制在较低水平，可以降低其内储存的食材的呼吸速率，抑制食材的新陈代谢，达到保鲜作用，并可以抑制变质、细菌的繁殖。
如图1所示，可选地，保鲜室10以抽屉的方式设置在厨房电器1中，循环排氧装置20设置在保鲜室10后面，即循环排氧装置20设置在保鲜室10远离厨房电器1门的一侧，使得在拉开保鲜室10时，不会影响循环排氧装置20的位置，避免影响循环排氧装置20的内部元件之间的连接关系。在其他实施例中，保鲜室10可以由本体内置的腔体构成，另外冰箱还可包括用于启闭保鲜室10的门体。
在本实施例中，厨房电器1还进一步包括富氧空间。循环排氧装置20连通至富氧空间，富氧空间可以接收保鲜室10排出的富氧气体，从而富氧空间的氧含量增加。富氧空间可以存储有肉类食材，通过增加富氧空间内的氧含量可以保证实现其内存储的肉类保鲜颜色更鲜艳。
请参阅图2，图2是本申请循环排氧装置20一实施例的结构示意图。如图2所示，循环排氧装置20包括吸附塔21。吸附塔21包括进气口、出气口和排氧口。吸附塔21的进气口连通于保鲜室10，吸附塔21的出气口连通于保鲜室10，保鲜室10内的气体通过吸附塔21的进气口进入吸附塔21，吸附塔21对进入其内的保鲜室10内的气体进行排氧，将排氧后的气体通过吸附塔21的出气口返还至保鲜室10，并将过滤出的氧气经排氧口排出。
可选地，循环排氧装置20还可包括气泵22。气泵22包括进气口和出气口，气泵22的进气口连通于保鲜室10。气泵22的出气口连通于吸附塔21的进气口，气泵22将保鲜室10的空气加压传输至吸附塔21，吸附塔21对气泵22加压过的空气进行排氧并重新返还至保鲜室10，通过气泵22和吸附塔21对保鲜室10内的空气进行排氧，以降低保鲜室10内气体的氧含量，从而实现控氧保鲜。
可选地，如图3所示，循环排氧装置20还可包括气泵壳体23，气泵22完全密封于气泵壳体23内，以通过气泵壳体23对气泵22运转产生的噪音进行屏蔽，以降低噪音。另外，气泵22可通过橡胶垫24固定于气泵壳体23内，以通过橡胶垫24降低气泵22工作时的震动，从而达到降低震动声音的效果，有效的降低了噪音。进一步地，气泵22可以竖直固定于气泵壳体23内部，气泵22上端和下端分别通过一个橡胶垫24进行定位固定。其中，橡胶垫24的硬度可为27～39°，例如可为30°或35°。
可以理解的是，本申请可以通过循环排氧装置20对保鲜室10内的气体进行循环排氧，以在循环时间内持续运作，使得在循环时间内对保鲜室10内的气体进行持续排氧，以逐步降低保鲜室10内气体的含氧量，从而吸附塔21无需一次性地从加压过的气体排除大量的氧，每次吸附塔21可以将加压过的气体中较少量的氧排出，通过循环的多次排氧可以将保鲜室10内的气体的含氧量降低到较低水平，使得气泵22也可不将保鲜室10的空气加压到较高压力值，进而本申请可以使用小型气泵22，以降低控氧保鲜带来的噪音。
例如，假设气泵进气口的进气流量为3L/min，排氧口的出气流量为0.1L/min， 循环排氧装置开启后的第一分钟会从保鲜室抽出3L的原始气体，然后将0.1L的高氧气体从排氧口排出，并将2.9L的余气从吸附塔的出气口排至保鲜室，这2.9L的余气会与保鲜室内的其他气体混合，以待被循环排氧装置再次排氧；循环排氧装置开启后的第二分钟会从保鲜室抽出3L由余气和保鲜室的原始气体组成的气体，还会将0.1L的高氧气体从排氧口排出，并将2.9L的余气从吸附塔的出气口返还至保鲜室，以待被循环排氧装置再次排氧，这样循环往复，以逐步降低保鲜室内气体的含氧量，以将保鲜室内的气体的含氧量降低到较低水平。
可以理解的是，循环排氧过程中，循环排氧装置20用于将经循环排氧装置20排氧后的气体返还至保鲜室10，且用于对保鲜室10内的经排氧的气体再次排氧。具体地，气泵22可以用于将从保鲜室10抽取的空气和/或经排氧的气体加压并供应到吸附塔21，吸附塔21用于对经气泵22加压过的空气和/或经排氧的气体进行排氧，并将排氧后的气体再次供应到保鲜室10。
另外，通过循环排氧装置20对设置有单向阀的保鲜室10内的气体进行循环排氧，气泵22每单位时间可以只抽取相对较少的保鲜室10内的气体，从而只需要通过单向阀补充少量的外界空气到保鲜室10中，从而只会有少量的氧气补充进保鲜室10内，对降低保鲜室10内气体的含氧量不会造成较大影响，这样既可以保证保鲜室10压力平衡，又可以高效地通过循环排氧将保鲜室10内气体的含氧量降低至较低水平。
可选地，本申请可以通过吸附塔21吸附氮气而排除氧气的方式对保鲜室10的空气进行排氧，其中，吸附塔21吸附时，吸附氮气，过滤出经气泵22加压过的保鲜室10内的气体中的氧气，由吸附塔21的排氧口将过滤出的氧气排出；吸附塔21解吸时，释放排除氧气的剩余气体，并将余气通过吸附塔21的出气口返还至保鲜室10，即将变压吸附制氧技术反向运用到循环排氧装置20中，与制氧机相比，并不是使用氧气，本申请无需提取出高纯度的氧气，从而循环排氧装置20的气泵22无需为得到氧气含量极高的气体将保鲜室10内的气体加压到较高压力，而且无需一次性提取出氧气，可以采用不断的循环排氧的方式对保鲜室10进行排氧，使得气泵22可以将保鲜室10内的气体加压到较低压力，例如加压至0.03MPa～0.10MPa，这样可以通过小型气泵22将保鲜室10内气体的氧含量降低到较低水平，实现循环排氧装置20的小型化，实现低压分离，从而从根本上降低控氧保鲜造成的噪音，并且气泵22的功耗降低，气泵22不会 产生过多热量而影响气泵22寿命。另外通过吸附塔21吸附氮气而排除氧气的方式对保鲜室10内的气体进行循环排氧，可以高效地降低保鲜室10内气体的含氧量。另外，相比于最高只能排走28％氧气的富氧膜排氧方式，本申请通过吸附塔21吸附氮气而排除氧气的方式大约可以排走保鲜室10内70％-93％的氧气，排氧效率高，并且无需补充大量保鲜室10外的空气，保证了排氧效率。
在其他实现方式中，本申请可以通过吸附塔21吸附氧气而排除氧气的方式对保鲜室10的空气进行排氧。其中，吸附塔21吸附时，吸附氧气，过滤出排除氧气后的剩余气体，由吸附塔21的出气口将排除氧气后的剩余气体返还至保鲜室10；吸附塔21解吸时，释放出吸附的氧气，并将氧气通过吸附塔21的排氧口排除。当然，本申请还可以将电解膜等置于吸附塔21内，以通过电解膜等耗除保鲜室10的空气的氧气，并将排出氧气后的剩余气体通过吸附塔21的出气口返还至保鲜室10。
为便于叙述，下述内容将会对采用吸附氮气以实现排氧的吸附塔21的循环排氧装置20进行详细描述。可以理解的是，下述至少部分方案进行等效结构变换后也可同样应用于采用吸附氧气以实现排氧的吸附塔21的循环排氧装置20和采用电解膜以实现排氧的吸附塔21的循环排氧装置20等中。
为了便于控制吸附塔21的吸附和解附进程，本申请可通过阀门组件25实现吸附塔21吸附和解吸状态的切换，本申请的吸附塔21的进气口可通过阀门组件25的进气通道与气泵22的出气口连通，吸附塔21的出气口可通过阀门组件25的出气通道与保鲜室10连通，在阀门组件25的进气通道开启且阀门组件25的出气通道关闭时，使气泵22将保鲜室10的空气加压并通过阀门组件25的进气通道传输至吸附塔21，吸附塔21处于吸附状态，吸附塔21吸附空气中的氮气，过滤出空气中的氧气，使氧气从吸附塔21的排氧口排出；在阀门组件25的进气通道关闭且阀门组件25的出气通道开启时，气泵22停止向吸附塔21加压传输空气，吸附塔21处于解吸状态，吸附塔21释放余气，经由吸附塔21的出气口及阀门组件25的出气通道排至保鲜室10。可选地，本申请的阀门组件25可以包括第一阀门251和第二阀门252，其中，出气通道设置于第一阀门251内，进气通道设置于第二阀门252内。当然，在其他实现方式中，也可以将出气通道和进气通道设置于同一个阀门组件25内。
为了高效低耗时地降低保鲜室10内的氧含量，可在循环排氧装置20内设 有至少两个吸附塔21，通过至少两个吸附塔21可以持续地对保鲜室10内的空气进行氧气排出，并可以持续地将吸附塔21吸附的余气脱附到保鲜室10内，高效低耗时地控制保鲜室10内的氧含量。
其中，至少两个吸附塔21可包括第一吸附塔21和第二吸附塔21。通过第一阀门251和第二阀门252实现一个吸附塔21吸附和解吸状态的切换时，第一阀门251对应每一第一吸附塔21具有一第一进气通道，对应每一第二吸附塔21具有一第二进气通道；第二阀门252对应每一第一吸附塔21具有一第一出气通道，对应每一第二吸附塔21具有一第二出气通道。交替开启第一阀门251中第一进气通道和第二进气通道，并交替开启第二出气通道和第一出气通道，在第一进气通道开启时控制第一出气通道关闭并控制第二出气通道开启，在第二进气通道开启时控制第二出气通道关闭并控制第一出气通道开启，从而可以做到在第一吸附塔21和第二吸附塔21中的一个吸附时，将从第一吸附塔21和第二吸附塔21中的另一个脱附出的余气通过出气通道流入到保鲜室10内，高效低耗时地控制保鲜室10内的氧含量。
进一步地，吸附塔21的数目为两个。第一阀门251和第二阀门252均为两位三通电磁阀，通过两位三通电磁阀可以自如地切换第一阀门251内部的第一出气通道和第二出气通道的启闭，也可自如地切换第二阀门252内部的第一进气通道和第二进气通道的启闭，从而实现切换两个吸附塔21的工作状态，从而可以做到在第一吸附塔21和第二吸附塔21中的一个吸附时，将从第一吸附塔21和第二吸附塔21中的另一个脱附出的余气通过出气通道流入到保鲜室10内，从而可以控制第一阀门251、第二阀门252和气泵22的运行可以实现持续地对保鲜室10内的空气进行氧气排出，并可以持续地将吸附塔21吸附的余气脱附并传输到保鲜室10内，高效低耗时地控制保鲜室10内的氧含量。
在本实施例中，吸附塔21中可设置有吸附物质。吸附塔21内设置的吸附物质处于吸附状态时，吸附物质对氮的吸附能力大于对氧的吸附能力。吸附塔21内设置的吸附物质可以是沸石分子筛颗粒。空气中的氮气的极性较氧气的大，沸石分子筛具有对空气中的氧氮各组成具有不同的吸附能力，可以通过沸石分子筛从空气中优先吸附氮气，可以将空气中的氧气过滤出去，从而空气从吸附塔21的进气口进入，经过沸石分子筛的吸附，从吸附塔21流出的空气中的氧气含量超过空气内的氧气含量。进而从沸石分子筛脱附出的气体中的氧气含量 明显低于空气内的氧气含量，即沸石分子筛脱附出的气体为低氧含量气体，通过将沸石分子筛脱附出的气体传输到保鲜室10内，可以降低保鲜室10内氧气的含量，提高保鲜效果。沸石分子筛颗粒的尺寸可为0.4mm～0.8mm，例如可为0.5mm、0.6mm、0.7mm。当然，在其他实施例中，吸附塔21内设置的吸附物质还可以是磷酸硅铝分子筛。
即本申请是通过吸附塔21的吸附和脱附控制保鲜室10氧含量的，由于吸附物质具有吸附量随被吸附组分分压的增加而增加的特性，本实施例通过压力变化完成吸附和解附而实现空气分离，即通过压力变化使吸附塔21处于吸附或脱附状态。具体地，本实施例通过气泵22增加空气的压力，使空气变为压缩空气，进而将压缩空气传入到吸附塔21中，变相地增加吸附塔21内的压力，从而使吸附塔21处于吸附阶段，即使吸附塔21将压缩空气中的至少部分氧气过滤出去，在气泵22不再将压缩空气传输到吸附塔21内时，吸附塔21压力降低，吸附塔21对其吸附的氮气等物质的吸附能力降低，吸附塔21会将其内吸附的物质解附出来，并通过吸附塔21的进气口、第二阀门252的出气通道流入到保鲜室10内，即将吸附塔21脱附出来的余气流入到第保鲜室10内，使保鲜室10内氧气含量降低，可以实现控氧保鲜。对应于沸石分子筛的颗粒大小，在本实施例中，气泵22可以将空气加压至0.03MPa～0.2MPa，以保证吸附塔21能在该压力下能够将压缩空气中的至少部分氧气过滤出去。进一步地，采用循环排氧逐步降低保鲜室10内气体的氧含量时，气泵22可以将空气加压至0.03MPa～0.10MPa，例如40KPa、60KPa、75KPa等，以通过小型气泵22进行循环多次排氧将保鲜室10内气体的氧含量降低到较低水平，实现低压分离，从而从根本上降低控氧保鲜造成的噪音。
沸石分子筛的颗粒大小和气泵22对空气的加压对应关系，可实现气泵22的小型化，减小循环排氧装置20的功率消耗，减小噪声。沸石分子筛的粒径若过小，则气流传输阻力过大，就需要适当增加压力。从而吸附塔21内填充的沸石分子筛的粒径应当较均匀且较适中，例如将沸石分子筛颗粒的尺寸设置为0.4mm～0.8mm，吸附塔21内的压力在0.03MPa～0.10MPa就可将气流的氧气过滤出来，从而可以不需要气泵22对空气增加过多压力，可以实现气泵22的小型化，减小循环排氧装置20的功率消耗，减小噪声。
在本实施例中，吸附塔21可为圆柱形，配合圆柱形的吸附塔21，在占地面 积相同的情况下，圆柱形体积更大，所能容纳的沸石分子筛更多，且气流更加顺畅均匀。当然吸附塔21也可呈正方体、长方体等其他规则或不规则形状。
可以通过控制吸附塔21的尺寸控制吸附塔21的吸附容量，将吸附塔21的尺寸控制在一个恰当的范围内时既可以保证吸附塔21的吸附容量又可以保持较小体积，这个尺寸的吸附塔21和沸石分子筛配合可对应到小型的气泵22，气泵22和吸附塔21等集成在一起，可实现整体结构的优化。具体地，吸附塔21的直径范围可为20mm-40mm。吸附塔21的高度范围可为100mm-160mm，避免吸附塔21体积过大导致气泵22需要更高的工作压力，也避免吸附塔21体积过小对少量的气体进行过滤氧气后就需要解附以脱除余气而导致排氧效率低，这样也可以保证30KPa-100KPa的传输流量为3L/min～15L/min的气体进入该尺寸的吸附塔21时吸附塔21的吸附物质对气体里的氧气的过滤效率。可选地，吸附塔21的直径可为20mm、24mm、29mm、32mm或37mm。吸附塔21的高度可为120mm、135mm、140mm、150mm或155mm。
对应于吸附塔21的小尺寸设计，气泵22的传输流量也做对应的设计。可以通过改变气泵22的传输流量改变压缩空气中的分子与吸附塔21内的吸附物质的接触时间，从而改变吸附塔21对压缩空气的吸附效率。传输速度过快，会使压缩空气中的分子与吸附物质接触时间过短，不利于气体的吸附，降低吸附速率；传输速度过低，又会使吸附塔21容积增大。因此，传输流量要控制在一定的范围之内，在本实施例中，气泵22的传输流量为3L/min～15L/min，具体可为5L/min、8L/min或10L/min。当然，为保持吸附塔21的吸附效率，气泵22每秒的传输流量与吸附塔21的容积的比值可为1.2～2.2。
在本实施例中，排氧口的出气流量为0.1L/min～0.5L/min，这样循环排氧装置20通过排氧口小流量排出富氧气体，以在循环排氧装置20通过排氧口排除氧气量一定的情况下，降低从排氧口排出的气体总量，从而可以保证从排氧口排出的气体的含氧量比较高，且避免通过排氧口排出大量非氧气体，进而保证循环排氧装置20对保鲜室10的排氧效率。另外，排氧口的出气流量和气泵22的进气口的进气流量的比例为1/100～1/6。
另外，对应于循环排氧装置20的低噪音设计，本申请的循环排氧装置20还可包括缓冲罐26，缓冲罐26用于对吸附塔21出气口排出的余气进行缓冲，降低了余气的流速，以降低噪音。进一步地，本申请的缓冲罐26可为依次连通 的至少两个缓冲罐26，吸附塔21通过第二阀门252的出气通道连通于第一个缓冲罐26，余气经过第一个缓冲罐26，再从第一个缓冲罐26的出气口出来，余气实现一次缓冲，从第一个缓冲罐26出来的余气，再进入第二个缓冲罐26的进气口，经过第二个缓冲罐26，再从第二个缓冲罐26的出气口出来，实现二次缓冲，直至从最后一个缓冲罐26的出气口出来，实现至少两次缓冲，这样通过至少两个缓冲罐26对吸附塔21出气口排出的余气进行至少两次缓冲，并由最后一个缓冲罐26将缓冲后的余气供应至保鲜室10，使得余气的流速大大降低，大幅度降低了因为余气流速太快造成的噪音，并且可以避免较高流速的气体对保鲜室10内的物体造成冲击，以保护保鲜室10内的物体。例如，如图4所示，循环排氧装置20包括第一缓冲罐261和第二缓冲罐262，通过第一缓冲罐261对吸附塔21排出的余气进行一次缓冲后，余气进入第二缓冲罐262，以通过第二缓冲罐262对余气进行二次缓冲，以降低余气流速，以减少噪音。
在本实施例中，缓冲罐26可为圆柱形。当然缓冲罐26也可呈正方体、长方体等其他规则或不规则形状。缓冲罐26的直径范围可为20mm-40mm。缓冲罐26的高度范围可为100mm-160mm。
每个缓冲罐26的出气口和进气口的直径约为0.5-5mm，以通过限制缓冲罐26出气口和进气口的直径，降低从每个缓冲罐26进出的余气的流量，从而有效地对余气进行缓冲。
另外，本申请的循环排氧装置20还可包括储氧罐27，储氧罐27的进气口通过阀连通于吸附塔21的排氧口，以在第一阀门251的进气通道开启时，吸附塔21过滤出的氧气通过排氧口流入至储氧罐27，并通过阀控制从吸附塔21进入储氧罐27的氧气的流量；且在第一阀门251的进气通道关闭时，储氧罐27的氧气通过排氧口流入至吸附塔21，将储气罐的氧气反冲洗吸附塔21内的吸附物质，使吸附塔21脱附出余气并通过第二阀门252的出气通道返还至保鲜室10，并通过阀控制从储气罐进入吸附塔21的氧气的流量，以控制反冲洗的流量。
在本实施例中，储氧罐27可为圆柱形。当然储氧罐27也可呈正方体、长方体等其他规则或不规则形状。储氧罐27的直径范围可为20mm-40mm。储氧罐27的高度范围可为100mm-160mm。
可选地，阀可为节流子。节流子的直径可为0.3-0.6mm，例如可为0.4mm、0.45mm或0.56mm。
可选地，吸附塔21、缓冲罐26和储氧罐27可由一体式的罐塔和底板构成，实现吸附功能、缓冲功能以及储氧功能集成到一个集成件上，以减小吸附塔21等构成的循环排氧装置20的体积和重量。罐塔包括构成吸附塔21、缓冲罐26和储氧罐27的多个腔体、底板盖设于罐塔以密封多个腔体，并使多个腔体分别形成相互隔离的吸附塔21、缓冲罐26和储氧罐27。
另外，吸附塔21、缓冲罐26和储氧罐27可具有相同的高度，且并排设置于同一水平高度，可保证循环排氧装置20更加紧凑，以实现循环排氧装置20小型化设计，且便于气路分布。在其他实施例中，吸附塔21、缓冲罐26和储氧罐27的高度可不相同，可以不并排设置，还可以不设置于同一水平高度。
可选地，吸附塔21、缓冲罐26和储氧罐27可具有相同的尺寸。当然，在其他实施例中，吸附塔21、缓冲罐26和储氧罐27的尺寸可不相同。
吸附塔21的进气口和出气口设置于吸附塔21的顶端，排氧口设置于吸附塔21的底端；缓冲罐26的进气口和出气口均设置于缓冲罐26的顶端；储氧罐27的进气口设置于储氧罐27的底端，以便于设置管路，且可以减小吸附塔21等构成的循环排氧装置20的体积。
在本实施例中，吸附塔21、缓冲罐26和储氧罐27可构成凹形结构，气泵壳体23可嵌入该凹形结构中，以降低吸附塔21等构成的循环排氧装置20的体积。
可以理解的是，如图5所示，为了实现气体在气泵22、保鲜室10、吸附塔21等部件之间流动，可在气泵22、保鲜室10和吸附塔21之间设置有气路。其中，气泵22的进气口通过第四气路284连通于保鲜室10，气泵22的出气口通过第五气路285连通于第一阀门251的进气通道，第一阀门251的进气通道通过第三气路283连通于吸附塔21的进气口，吸附塔21的出气口通过第一气路281连通于第二阀门252的出气通道，第二阀门252的出气通道通过第二气路282连通于第一个缓冲罐26，相邻两个缓冲罐26通过第六气路286连通，最后一个缓冲罐26通过第七气路287连通于保鲜室10，吸附塔21的排氧口通过第八气路288连通于储氧罐27的进气口，储氧罐27的出气口通过第九气路289排出。一般来说，可以将上述第一气路281到第九气路289设计成相互独立的气管，但是由于气路较多导致气管排布比较麻烦，也会导致吸附塔21、气泵22、气路等组成的循环排氧装置20体积较大，从而可以将至少部分气路置于一个气 路板280内，以将主要气路设计为一个气路板280，不用多根气管来连接，实现气路的整洁，并且可以简化循环排氧装置20制作过程并减少用于固定多个气管的固定件数量，从而可以提高循环排氧装置20的组装效率并降低循环排氧装置20的制作成本。其中，气管可为软胶气管或硬质气管。
示例性地，如图6所示，本申请可以将第三气路283、第一气路281和第二气路282设置于气路板280中。为此可使吸附塔21的进气口和出气口、以及缓冲罐26的进气口和出气口均朝向气路板280设置，以通过气路板280、第二阀门252就可实现气体在吸附塔21和缓冲罐26之间流动，且可以降低第六气路286的长度。其中，气路板280可设置于吸附塔21、缓冲罐26和储氧罐27的顶端。可选地，第一阀门251和第二阀门252可设置于气路板280和气泵22之间，以提高吸附塔21等构成的循环排氧装置20的紧凑性，以减小循环排氧装置20的体积。另外，吸附塔21的排氧口和储氧罐27的进气口背向气泵22的一侧，这样无需将第八气路288设置在吸附塔21和气泵22之间，使得吸附塔21、气泵22、储氧罐27和缓冲罐26之间更加紧凑。
在本实施例中，循环排氧装置20还可进一步包括控制设备。控制设备可与气泵22和阀门组件25电性连接，可以控制气泵22的运行，还可以控制阀门组件25内进气通道和出气通道的启闭。
进一步地，控制设备可包括氧气检测器。氧气检测器可以用于检测保鲜室10的含氧量，控制设备基于保鲜室10的氧含量控制气泵22和阀门组件25的运行。在氧气检测器检测到的保鲜室10的含氧量高于第一阈值时，可以控制气泵22和阀门组件25，通过气泵22、阀门组件25和吸附塔21共同控制保鲜室10内含氧量，使保鲜室10含氧量降低。在氧气传感器检测到的含氧量低于第二阈值时，可以控制气泵22停止运行，即不再通过气泵22、阀门组件25和吸附塔21共同控制保鲜室10的含氧量。
进一步地，控制设备还可包括开合检测器，开合检测器用于检测保鲜室10是否打开，控制设备可以基于保鲜室10的启闭情况控制气泵22和阀门组件25的运行。在开合检测器检测到保鲜室10未开启时，可以控制气泵22和阀门组件25，通过气泵22、阀门组件25和吸附塔21共同作用控制保鲜室10内的含氧量，保鲜室10含氧量降低，在开合检测器检测到保鲜室10开启时，可以控制气泵22和阀门组件25停止工作。可选的，该开合检测器可以为光线传感器、 红外传感器、磁控开关中的任意一种，以实现对保鲜室10的开合检测。
另外，控制设备还可设置为每天定时通过气泵22、第一阀门251、第二阀门252和吸附塔21降低保鲜室10的含氧量。例如，每天9点-12点、14-16点控制气泵22、第一阀门251、第二阀门252和吸附塔21降低保鲜室10的含氧量，其余时间停止。又例如，每天开启2个小时停止4个小时，开停循环。需要说明的是，以上各具体数值仅为例举，而并非对本申请的限定。
图7是根据本申请的另一个实施例的循环排氧装置20的结构示意图。
请参阅图7，本实施例的循环排氧装置20包括两个吸附塔21、储氧罐27、两个缓冲罐26、气泵22和阀门组件25。阀门组件25为两位五通阀。
气泵22的进气口通过第四气路284连通于保鲜室10，气泵22的出气口通过第五气路285连通于阀门组件25的进气通道，阀门组件25的进气通道通过第三气路283连通于吸附塔21的进气口，吸附塔21的出气口通过第一气路281连通于阀门组件25的出气通道，阀门组件25的出气通道通过第二气路282连通于第一缓冲罐261，相邻两个缓冲罐26通过第六气路286连通，最后一个缓冲罐26通过第七气路287连通于保鲜室10，吸附塔21的排氧口通过第八气路288连通于储氧罐27的进气口，储氧罐27的出气口通过第九气路289排出。其中，第一气路281到第九气路289均设计成相互独立的气管。
其中，吸附塔21、缓冲罐26和储氧罐27均为圆柱形，具有相同的高度，且并排设置于同一水平高度。阀门组件25设置于缓冲罐26的底端。气泵22设置于阀门组件25背向吸附塔21的一侧。
另外，吸附塔21的进气口和出气口设置于吸附塔21的底端，排氧口设置于吸附塔21的顶端。第一缓冲罐261的进气口设置于第一缓冲罐261的底端。第一缓冲罐261的出气口设置于第一缓冲罐261的顶端。第二缓冲罐262的进气口和出气口均设置于第二缓冲罐262的顶端。储氧罐27的进气口和出气口均设置于储氧罐27的顶端。且气泵22的出气口朝向阀门组件25设置。
总而言之，本申请的循环排氧装置20包括气泵22和吸附塔21，循环排氧装置20在循环时间内持续运作，对保鲜室10内的气体进行持续排氧，以逐步降低保鲜室10内气体的含氧量，从而吸附塔21无需一次性地从加压过的气体排除大量的氧，每次吸附塔21可以将加压过的气体中较少量的氧排出，通过循环的多次排氧可以将保鲜室10内的气体的含氧量降低到较低水平，使得气泵也 可不将保鲜室10的空气加压到较高压力值，进而本申请可以使用小型气泵，以降低控氧保鲜带来的噪音。
另外，保鲜室10还可以设有单向阀，便于打开保鲜室，通过单向阀使得保鲜室10的外壁无需承受较大的压力，因此无需要求制作保鲜室10的外壁的材料具有较高的强度或采用复杂特殊的结构，降低了应用成本；并且通过循环排氧装置20对设置有单向阀的保鲜室10内的气体进行循环排氧，气泵每单位时间可以只抽取相对较少的保鲜室10内的气体，从而只需要通过单向阀补充少量的外界空气到保鲜室10中，从而只会有少量的氧气补充进保鲜室10内，对降低保鲜室10内气体的含氧量不会造成较大影响，这样既可以保证保鲜室10压力平衡，又可以高效地通过循环排氧将保鲜室10内气体的含氧量降低至较低水平。
以上仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。
Claims (14)
- 一种循环排氧装置，其特征在于，所述循环排氧装置用于对保鲜室进行排氧，所述循环排氧装置包括：气泵，所述气泵包括第一进气口和第一出气口，所述气泵的第一进气口连通于所述保鲜室；吸附塔，所述吸附塔包括第二进气口、第二出气口和排氧口，所述吸附塔的第二进气口连通于所述气泵的第一出气口，所述吸附塔的第二出气口连通于所述保鲜室；其中，所述气泵在循环时间内持续运作，以对所述保鲜室持续排氧。
- 根据权利要求1所述的循环排氧装置，其特征在于，所述气泵的第一进气口的进气流量为3L/min～10L/min，所述排氧口的出气流量为0.1L/min～0.5L/min。
- 根据权利要求1所述的循环排氧装置，其特征在于，所述气泵的压力为30KPa～100KPa。
- 根据权利要求1所述的循环排氧装置，其特征在于，所述循环排氧装置包括至少两个缓冲罐，所述至少两个缓冲罐依次连通，所述至少两个缓冲罐中的第一个缓冲罐的进气口连通于所述吸附塔的第二出气口，最后一个缓冲罐的出气口连通于所述保鲜室。
- 根据权利要求4所述的循环排氧装置，其特征在于，所述循环排氧装置包括阀门组件，所述气泵的第一出气口通过阀门组件的进气通道连通于所述吸附塔的第二进气口，所述吸附塔的第二出气口通过所述阀门组件的出气通道连通于所述保鲜室。
- 根据权利要求5所述的循环排氧装置，其特征在于，所述循环排氧装置包括储氧罐，所述吸附塔的排氧口连通于所述储氧罐。
- 根据权利要求6所述的循环排氧装置，其特征在于，所述吸附塔、所述缓冲罐和所述储氧罐均为圆柱形，具有相同的高度，且并排设置于同一水平高度。
- 根据权利要求7所述的循环排氧装置，其特征在于，所述吸附塔、所述缓冲罐和所述储氧罐的直径均为20mm～40mm，高度均为100mm～160mm；所述吸附塔中设置有沸石分子筛颗粒，所述沸石分子筛颗粒的尺寸为 0.4mm～0.8mm。
- 根据权利要求8所述的循环排氧装置，其特征在于，所述吸附塔、所述缓冲罐和所述储氧罐由一体式的罐塔和底板构成，所述罐塔包括构成所述吸附塔、所述缓冲罐和所述储氧罐的多个腔体、所述底板盖设于所述罐塔以密封所述多个腔体，并使所述多个腔体分别形成相互隔离的所述吸附塔、所述缓冲罐和所述储氧罐。
- 根据权利要求9所述的循环排氧装置，其特征在于，所述吸附塔的第二进气口和第二出气口设置于所述吸附塔的顶端，排氧口设置于所述吸附塔的底端；所述缓冲罐的进气口和出气口均设置于所述缓冲罐的顶端；所述储氧罐的进气口设置于所述储氧罐的底端；所述循环排氧装置包括气路板，设置于所述吸附塔、所述缓冲罐和所述储氧罐的顶端；所述气路板上形成有第一气路、第二气路和第三气路，所述第一气路连通所述吸附塔的第二出气口和所述阀门组件的出气通道，所述第二气路连通所述阀门组件的出气通道和所述第一个缓冲罐；所述第三气路连通所述阀门组件的进气通道和所述吸附塔的第二进气口。
- 根据权利要求5所述的循环排氧装置，其特征在于，所述循环排氧装置还包括控制设备，所述控制设备连接于所述阀门组件，所述控制设备控制阀门组件进气通道开启，使所述气泵将所述保鲜室的空气加压传输至所述吸附塔，所述吸附塔过滤出所述空气中的氧气，由所述吸附塔的第二出气口排出，并吸附余气；所述控制设备控制所述阀门组件的进气通道关闭，使所述气泵停止向所述吸附塔加压传输所述空气，所述吸附塔释放所述余气，经由所述吸附塔的第二进气口及所述阀门组件的出气通道排至所述保鲜室。
- 根据权利要求11所述的循环排氧装置，其特征在于，所述控制设备包括氧气检测器，用于检测所述保鲜室的含氧量，所述控制设备基于所述保鲜室的氧含量控制所述气泵和所述阀门组件的运行；和/或，所述控制设备包括开合检测器，用于检测所述保鲜室的启闭情况，所述控制设备基于所述保鲜室的启闭情况控制所述气泵和所述阀门组件的运行。
- 根据权利要求5所述的循环排氧装置，其特征在于，所述吸附塔包括两个，两个吸附塔分为第一吸附塔和第二吸附塔；所述阀门组件对应每一第一 吸附塔具有一第一进气通道和一第一出气通道，对应每一第二吸附塔具有一第二进气通道和一第二出气通道；交替控制所述阀门组件中第一进气通道开启和第二进气通道关闭，或者第一出气通道关闭和第二出气通道开启。
- 一种厨房电器，其特征在于，所述厨房电器包括权利要求1-13任一项所述的循环排氧装置，所述循环排氧装置连通于所述厨房电器内的保鲜室，所述保鲜室设置有单向阀，保鲜室外部的空气能够通过所述单向阀进入内部。
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