阅读说明：本技术 真空罐食品保鲜箱 (Vacuum tank food fresh-keeping box ) 是由 欧阳宝武 欧阳扬洋 欧阳玉珊 于 2020-04-03 设计创作，主要内容包括：本发明公开了一种真空罐食品保鲜箱,包括真空泵及进气阀、排气阀总成(1),真空泵连接线(2),自控真空阀(3),抽真空主管道(4),内箱体及托板(5),外箱体(6),保温层(7),圆柱及球冠圆底真空罐(8),密封硅胶垫圈(9)保鲜箱门(10)及紫外线杀菌灯及灯座连线总成(11)吹风扇总成(12),风扇温度自动控制开关装置总成(12—1),水冷排管组总成(13),出水管(13—1),电磁阀连线及自来水进水管(13—2)和温水储存箱(14)等,装配成的真空罐食品保鲜箱,不使用带有制冷剂的制冷压缩机而降低了制造成本并减少了对臭氧层的危害,使用本发明时耗电极少,食品保鲜时间长且食品不失水分。(The invention discloses a vacuum tank food fresh-keeping box, which comprises a vacuum pump, an air inlet valve and an exhaust valve assembly (1), a vacuum pump connecting wire (2), an automatic control vacuum valve (3), a vacuumizing main pipeline (4), an inner box body and a supporting plate (5), an outer box body (6), a heat-insulating layer (7), a cylindrical and spherical crown round bottom vacuum tank (8), a sealing silica gel gasket (9), a fresh-keeping box door (10), an ultraviolet sterilizing lamp and lamp holder connecting wire assembly (11), a blowing fan assembly (12), a fan temperature automatic control switch device assembly (12-1), a water-cooling calandria assembly (13), a water outlet pipe (13-1), an electromagnetic valve connecting wire, a tap water inlet pipe (13-2), a warm water storage tank (14) and the like, wherein the assembled vacuum tank food fresh-keeping box does not use a refrigeration compressor with a refrigerant, thereby reducing the manufacturing cost and the harm to an ozone layer, the invention has the advantages of low power consumption, long food preservation time and no water loss of food.)

1. A vacuum tank food fresh-keeping box comprises a vacuum pump, an air inlet valve, an exhaust valve assembly (1), a vacuum pump connecting wire (2), an automatic control vacuum valve (3), a vacuumizing main pipeline (4), an inner box body, a supporting plate (5), an outer box body (6), a heat-insulating layer (7), a cylindrical and spherical crown round bottom vacuum tank (8), a sealing silica gel gasket (9), a fresh-keeping box door (10), an ultraviolet germicidal lamp and lamp holder connecting wire assembly (11) and the like; the method is characterized in that: more than one cylinder and spherical crown round bottom vacuum tank (8) with the thickness more than 3 mm and the outer diameter more than 200 mm and an integrated spherical crown round bottom tank cover and inner box assembly (8-3) with the same thickness more than 3 mm and the diameter more than 200 mm are manufactured by pressure-resistant transparent materials; a sealing silica gel gasket (9) is concentrically adhered to the left port edge of a cylindrical and spherical crown round bottom vacuum tank (8) by an adhesive, a piece of N-pole magnet (8-1) is respectively and tightly adhered to the upper and lower right outer edges of a spherical crown round bottom tank cover and an inner box assembly (8-3), a piece of S-pole magnet (8-1) is respectively and tightly adhered to the upper and lower left outer edges of the cylindrical and spherical crown round bottom vacuum tank (8), and the sealing silica gel gasket is tightly sealed and buckled with the spherical crown round bottom tank cover and the inner box assembly (8-3) by the magnetic attraction of the N-pole magnet (8-1) and the S-pole magnet (8-1); a through hole is processed at the left upper end of the spherical cap round bottom tank cover and inner box assembly (8-3), and a hand-operated air inlet valve assembly (8-2) made of the same material is concentrically arranged with the through hole; a vacuum pumping main pipeline (4) which is hermetically communicated with an air inlet pipe of the vacuum pump, air inlet valve and exhaust valve assembly (1) is provided with more than one right exhaust pipes (3-2-3) which are hermetically communicated with the self-control vacuum valve (3); the left air exhaust pipe (3-2-5) at the other end of more than one self-control vacuum valve (3) is concentrically and hermetically communicated with the round bottom of the spherical crown in more than one corresponding cylinder and spherical crown round bottom vacuum tank (8); more than one cylinder and the upper edge of the spherical crown round bottom vacuum tank (8) are respectively sealed and stuck with an ultraviolet germicidal lamp and lamp holder connecting line assembly (11); the lower edges of more than one cylindrical and spherical crown round bottom vacuum tanks (8) are respectively and fixedly arranged on the corresponding inner box body of the inner box body (9) and the supporting plate (5); the vacuum pump input live wire (2-3) is connected with a power live wire and then connected with one end of a touch switch (2-2) of a refrigerating chamber door arranged on a refrigerating chamber and a door (10), the other end of the touch switch (2-2) is connected with a power lead wiring board and a thin fixed contact assembly (3-3) on an automatic control vacuum valve (3), a vacuum pump lead wiring board and a thin fixed contact assembly (3-6) on the automatic control vacuum valve (3) are connected with the input live wire on a vacuum pump connecting wire (2) in series, and a vacuum pump zero wire (2-1) is connected with a zero wire on the vacuum pump connecting wire (2); one connecting wire on the ultraviolet germicidal lamp and lamp holder connecting wire assembly (11) is connected in parallel with a vacuum pump lead wire wiring board and a thin fixed contact assembly (3-6) on the automatic control vacuum valve (3), and the other connecting wire on the ultraviolet germicidal lamp and lamp holder connecting wire assembly (11) is connected in parallel with a vacuum pump zero line (2-1); a vacuum pump, an air inlet valve, an exhaust valve assembly (1) and a vacuum pump connecting line (2) are arranged at the lower part in the outer box body (6); the vacuum pump, the air inlet valve and the exhaust valve assembly (1) are started to vacuumize under the automatic control of the automatic control vacuum valve (3), more than one cylinder covered with the spherical crown round bottom tank cover and the inner box assembly (8-3) in the preservation tank door (10) and the cylinder covered with the spherical crown round bottom vacuum tank (8) are automatically vacuumized to the set vacuum of more than 10pa through the automatic control vacuum valve (3) and the vacuumizing main pipeline (4) communicated with the sealing, and then the automatic control vacuum valve (3) is automatically powered off under the atmospheric pressure to stop the vacuum pump, the air inlet valve and the exhaust valve assembly (1).

2. The vacuum can food preservation box of claim 1, wherein: the spherical crown round bottom tank cover and the inner box (8-5) are integrally manufactured into an integral spherical crown round bottom tank cover and inner box assembly (8-3) from the same material, and the lower edge and the left and right edges of the inner box (8-5) at the right side of the integral spherical crown round bottom tank cover and inner box assembly (8-3) are respectively provided with a clearance of more than 1 mm corresponding to the cylinder and the spherical crown round bottom vacuum tank (8); the integrated spherical cap round bottom tank cover and inner box assembly (8-3) is integrally manufactured with the outer lower edge thereof into a handle (8-4).

3. The vacuum can food preservation box of claim 1, wherein: an N-pole magnetic rubber ring (8-1-2) is tightly bonded at the right outer edge of the spherical cap round bottom tank cover and the inner box assembly (8-3), an S-pole magnetic rubber ring (8-1-3) is tightly bonded at the left outer edge of the cylindrical and spherical cap round bottom vacuum tank (8) and is tightly sealed and buckled with the spherical cap round bottom tank cover and the inner box assembly (8-3) by means of the magnetic attraction of the N-pole magnetic rubber ring (8-1-2) and the S-pole magnetic rubber ring (8-1-3).

4. The vacuum can food preservation box of claim 1, wherein: after a valve casing (8-2-1) of a hand-poked air inlet valve assembly (8-2) is concentrically and hermetically welded on a through hole at the upper left end of a spherical crown round bottom tank cover (8-3), a silica gel ring (8-2-5), a valve rod (8-2-3) and a small spring (8-2-4) are sequentially and concentrically placed in the valve casing (8-2-1), and a valve rod pressure cap (8-2) is concentrically installed and screwed down.

5. The vacuum can food preservation box of claim 1, wherein: a lower dustproof air inlet (6-2) with the diameter of more than 200 mm is manufactured in the left middle of the lower bottom surface of the outer box body (6), and an upper dustproof air outlet (6-1) with the area smaller than that of the lower dustproof air inlet (6-2) by half is manufactured in the middle of the upper portion of the right rear surface of the outer box body (6).

6. The vacuum can food preservation box of claim 1, wherein: an inner circle on a vacuum valve casing (3-2) of the self-control vacuum valve (3) made of plastic with strength is processed into a conical blind inner hole (3-2), an upper outer circle on the vacuum valve casing (3-2) is processed into an external thread (3-2-1), a middle right end on the vacuum valve casing (3-2) is processed into a right exhaust pipe (3-2-3), a middle left end on the vacuum valve casing (3-2) is processed into a left pumped pipe (3-2-5), and an inner hole lower part on the vacuum valve casing (3-2) and a convex rectangular spring seat (3-2-4) with the length left and right are manufactured into the vacuum valve casing (3-2); the conical valve body (3-7) which is concentric with the conical blind inner hole (3-2) and is in sealing fit with the conical blind inner hole is made of elastic rubber, the lower part of the conical valve body (3-7) is concentrically processed into a convex contact (3-7-2), and the upper part of the conical valve body (3-7) is concentrically processed into a thin convex circular cover (3-7-1); the power supply lead wiring board and the thin fixed contact assembly (3-3) and the vacuum pump lead wiring board and the thin fixed contact assembly (3-6) are concentrically arranged at the right and left sides and are hermetically arranged at the two sides of the middle lower part of the vacuum valve shell (3-2) by sealant; the power supply lead wiring board and the wiring board of the thin fixed contact piece assembly (3-3) are arranged at the right outer side of the vacuum valve casing (3-2), and the thin fixed contact piece is arranged at the right inner side of the vacuum valve casing (3-2); the wiring board of the vacuum pump lead wire and the wiring board of the thin fixed contact piece assembly (3-6) are arranged at the left outer side of the vacuum valve casing (3-2), and the thin fixed contact piece is arranged at the left inner side of the vacuum valve casing (3-2); the strip-shaped compression springs (3-5) are concentrically and tightly matched and arranged in the rectangular spring seats (3-2-4) which are long at the left and the right at the lower part of the inner hole of the vacuum valve shell (3-2); the movable contact spring (3-4) with the strip-shaped concave spring seat and the left and right long is kept away from the power supply lead wiring board and the thin fixed contact piece assembly (3-3) and the two thin fixed contact pieces of the vacuum pump lead wiring board and the thin fixed contact piece assembly (3-6), the strip-shaped compression spring (3-5) is compressed downwards, the movable contact spring (3-4) with the strip-shaped concave spring seat and the left and right long is made to be lower than the two thin fixed contact pieces, then the movable contact spring (3-4) with the strip-shaped concave spring seat and the left and right long is rotated, and the upper part of the strip-shaped compression spring (3-5) is made to concentrically fall into the strip-shaped concave spring seat; two sides of the movable contact pieces (3-4) which are provided with strip-shaped concave spring seats and are long left and right are contacted with two thin fixed contact pieces on a power supply lead wire connection board and thin fixed contact piece assemblies (3-3), a vacuum pump lead wire connection board and thin fixed contact piece assemblies (3-6); after the processed conical valve body (3-7) is concentrically installed in a vacuum valve casing (3-2) from top to bottom, a processed internal thread gland (3-1) is concentrically pressed on a thin convex circular cover (3-7-1) and is concentrically sleeved on an external thread (3-2-1) on the vacuum valve casing (3-2) to be screwed, so that the thin convex circular cover (3-7-1) protrudes upwards by more than 1 mm, the lower plane of a convex contact (3-7-2) on the conical valve body (3-7) and the upper plane of a movable contact piece (3-4) with a long strip-shaped concave spring seat are separated by more than 1 mm, and simultaneously, a right exhaust pipe (3-2-3) is communicated with a left pumped exhaust pipe (3-2-5).

7. The vacuum can food preservation box of claim 1, wherein: a water-cooling calandria assembly (13) with a wind fin is arranged below the lower dustproof air inlet (6-2), the right end of the water-cooling calandria assembly (13) is hermetically connected with an electromagnetic valve connecting line and a tap water inlet pipe (13-2), the left end of the water-cooling calandria assembly (13) is hermetically connected with a water outlet pipe (13-1), and the water outlet pipe (13-1) is hermetically connected with a warm water storage tank (14); a lower circulating air port (6-3) with the diameter of more than 100 mm is manufactured in the right middle part of the lower bottom surface of the outer box body (6), and a fan assembly (12), a fan temperature automatic control switch device assembly (12-1) and a power supply connecting wire (12-2) are installed below a water-cooling calandria assembly (13); the electromagnetic valve connecting wire and the electromagnetic valve connecting wire on the tap water inlet pipe (13-2) are connected in parallel with the power supply connecting wire (12-2) and the left side of the fan temperature automatic control switch device assembly (12-1).

Technical Field

The invention relates to a vacuum food can fresh-keeping box for people's life.

Background

The existing refrigerator has the disadvantages of high manufacturing cost, high power consumption in use, short fresh-keeping time of refrigerated food and excessive water loss of food.

Disclosure of Invention

The purpose of the invention is: the vacuum tank food fresh-keeping box has the advantages of low manufacturing cost, less electrode consumption during use, long fresh-keeping time of refrigerated food and no water loss of food.

The technical scheme of the invention is as follows: the device comprises a vacuum pump, an air inlet valve and exhaust valve assembly (1), a vacuum pump connecting wire (2), a self-control vacuum valve (3), a vacuumizing main pipeline (4), an inner box body and supporting plate (5), an outer box body (6), a heat preservation layer (7), a cylindrical and spherical crown round bottom vacuum tank (8), a sealing silica gel gasket (9), a fresh-keeping box door (10), an ultraviolet germicidal lamp and lamp holder connecting wire assembly (11) and the like; more than one cylinder and spherical crown round bottom vacuum tank (8) with the thickness more than 3 mm and the outer diameter more than 200 mm and an integrated spherical crown round bottom tank cover and inner box assembly (8-3) with the same thickness more than 3 mm and the diameter more than 200 mm are manufactured by pressure-resistant transparent materials; the spherical crown round bottom tank cover and the inner box (8-5) are integrally manufactured into an integral spherical crown round bottom tank cover and inner box assembly (8-3) from the same material, and the lower edge and the left and right edges of the inner box (8-5) at the right side of the integral spherical crown round bottom tank cover and inner box assembly (8-3) are respectively provided with a clearance of more than 1 mm corresponding to the cylinder and the spherical crown round bottom vacuum tank (8); the integrated spherical cap round bottom tank cover and inner box assembly (8-3) is integrally manufactured with the outer lower edge thereof into a handle (8-4). A sealing silica gel gasket (9) is concentrically adhered to the left port edge of a cylindrical and spherical crown round bottom vacuum tank (8) by an adhesive, a piece of N-pole magnet (8-1) is respectively and tightly adhered to the upper and lower right outer edges of a spherical crown round bottom tank cover and an inner box assembly (8-3), a piece of S-pole magnet (8-1) is respectively and tightly adhered to the upper and lower left outer edges of the cylindrical and spherical crown round bottom vacuum tank (8), and the sealing silica gel gasket is tightly sealed and buckled with the spherical crown round bottom tank cover and the inner box assembly (8-3) by the magnetic attraction of the N-pole magnet (8-1) and the S-pole magnet (8-1); or an N-pole magnetic rubber ring (8-1-2) is tightly bonded at the right outer edge of the spherical crown round bottom tank cover and inner box assembly (8-3), an S-pole magnetic rubber ring (8-1-3) is tightly bonded at the left outer edge of the cylindrical and spherical crown round bottom vacuum tank (8) and is tightly sealed and buckled with the spherical crown round bottom tank cover and inner box assembly (8-3) by means of the magnetic attraction of the N-pole magnetic rubber ring (8-1-2) and the S-pole magnetic rubber ring (8-1-3). A through hole is processed at the left upper end of the spherical cap round bottom tank cover and inner box assembly (8-3), and a hand-operated air inlet valve assembly (8-2) made of the same material is concentrically arranged with the through hole; after a valve casing (8-2-1) of a hand-poked air inlet valve assembly (8-2) is concentrically and hermetically welded on a through hole at the upper left end of a spherical crown round bottom tank cover (8-3), a silica gel ring (8-2-5), a valve rod (8-2-3) and a small spring (8-2-4) are sequentially and concentrically placed in the valve casing (8-2-1), and a valve rod pressure cap (8-2) is concentrically installed and screwed down. A vacuum pumping main pipeline (4) which is hermetically communicated with an air inlet pipe of the vacuum pump, air inlet valve and exhaust valve assembly (1) is provided with more than one right exhaust pipes (3-2-3) which are hermetically communicated with the self-control vacuum valve (3); the left air exhaust pipe (3-2-5) at the other end of more than one self-control vacuum valve (3) is concentrically and hermetically communicated with the round bottom of the spherical crown in more than one corresponding cylinder and spherical crown round bottom vacuum tank (8); more than one cylinder and the upper edge of the spherical crown round bottom vacuum tank (8) are respectively sealed and stuck with an ultraviolet germicidal lamp and lamp holder connecting line assembly (11); the lower edges of more than one cylindrical and spherical crown round bottom vacuum tanks (8) are respectively and fixedly arranged on the corresponding inner box body of the inner box body (9) and the supporting plate (5); a lower dustproof air inlet (6-2) with the diameter of more than 200 mm is manufactured in the left middle of the lower bottom surface of the outer box body (6), and an upper dustproof air outlet (6-1) with the area smaller than that of the lower dustproof air inlet (6-2) by half is manufactured in the middle of the upper part of the right rear surface of the outer box body (6); an inner circle on a vacuum valve casing (3-2) of the self-control vacuum valve (3) made of plastic with strength is processed into a conical blind inner hole (3-2), an upper outer circle on the vacuum valve casing (3-2) is processed into an external thread (3-2-1), a middle right end on the vacuum valve casing (3-2) is processed into a right exhaust pipe (3-2-3), a middle left end on the vacuum valve casing (3-2) is processed into a left pumped pipe (3-2-5), and an inner hole lower part on the vacuum valve casing (3-2) and a convex rectangular spring seat (3-2-4) with the length left and right are manufactured into the vacuum valve casing (3-2); the conical valve body (3-7) which is concentric with the conical blind inner hole (3-2) and is in sealing fit with the conical blind inner hole is made of elastic rubber, the lower part of the conical valve body (3-7) is concentrically processed into a convex contact (3-7-2), and the upper part of the conical valve body (3-7) is concentrically processed into a thin convex circular cover (3-7-1); the power supply lead wiring board and the thin fixed contact assembly (3-3) and the vacuum pump lead wiring board and the thin fixed contact assembly (3-6) are concentrically arranged at the right and left sides and are hermetically arranged at the two sides of the middle lower part of the vacuum valve shell (3-2) by sealant; the power supply lead wiring board and the wiring board of the thin fixed contact piece assembly (3-3) are arranged at the right outer side of the vacuum valve casing (3-2), and the thin fixed contact piece is arranged at the right inner side of the vacuum valve casing (3-2); the wiring board of the vacuum pump lead wire and the wiring board of the thin fixed contact piece assembly (3-6) are arranged at the left outer side of the vacuum valve casing (3-2), and the thin fixed contact piece is arranged at the left inner side of the vacuum valve casing (3-2); the strip-shaped compression springs (3-5) are concentrically and tightly matched and arranged in the rectangular spring seats (3-2-4) which are long at the left and the right at the lower part of the inner hole of the vacuum valve shell (3-2); the movable contact spring (3-4) with the strip-shaped concave spring seat and the left and right long is kept away from the power supply lead wiring board and the thin fixed contact piece assembly (3-3) and the two thin fixed contact pieces of the vacuum pump lead wiring board and the thin fixed contact piece assembly (3-6), the strip-shaped compression spring (3-5) is compressed downwards, the movable contact spring (3-4) with the strip-shaped concave spring seat and the left and right long is made to be lower than the two thin fixed contact pieces, then the movable contact spring (3-4) with the strip-shaped concave spring seat and the left and right long is rotated, and the upper part of the strip-shaped compression spring (3-5) is made to concentrically fall into the strip-shaped concave spring seat; two sides of the movable contact pieces (3-4) which are provided with strip-shaped concave spring seats and are long left and right are contacted with two thin fixed contact pieces on a power supply lead wire connection board and thin fixed contact piece assemblies (3-3), a vacuum pump lead wire connection board and thin fixed contact piece assemblies (3-6); after the processed conical valve body (3-7) is concentrically installed in a vacuum valve casing (3-2) from top to bottom, a processed internal thread gland (3-1) is concentrically pressed on a thin convex circular cover (3-7-1) and is concentrically sleeved on an external thread (3-2-1) on the vacuum valve casing (3-2) to be screwed, so that the thin convex circular cover (3-7-1) protrudes upwards by more than 1 mm, the lower plane of a convex contact (3-7-2) on the conical valve body (3-7) and the upper plane of a movable contact piece (3-4) with a long strip-shaped concave spring seat are separated by more than 1 mm, and simultaneously, a right exhaust pipe (3-2-3) is communicated with a left pumped exhaust pipe (3-2-5). The vacuum pump input live wire (2-3) is connected with a power live wire and then connected with one end of a touch switch (2-2) of a refrigerating chamber door arranged on a refrigerating chamber and a door (10), the other end of the touch switch (2-2) is connected with a power lead wiring board and a thin fixed contact assembly (3-3) on an automatic control vacuum valve (3), a vacuum pump lead wiring board and a thin fixed contact assembly (3-6) on the automatic control vacuum valve (3) are connected with the input live wire on a vacuum pump connecting wire (2) in series, and a vacuum pump zero wire (2-1) is connected with a zero wire on the vacuum pump connecting wire (2); one connecting wire on the ultraviolet germicidal lamp and lamp holder connecting wire assembly (11) is connected in parallel with a vacuum pump lead wire wiring board and a thin fixed contact assembly (3-6) on the automatic control vacuum valve (3), and the other connecting wire on the ultraviolet germicidal lamp and lamp holder connecting wire assembly (11) is connected in parallel with a vacuum pump zero line (2-1); a vacuum pump, an air inlet valve, an exhaust valve assembly (1) and a vacuum pump connecting line (2) are arranged at the lower part in the outer box body (6); the vacuum pump, the air inlet valve and the exhaust valve assembly (1) are started to vacuumize under the automatic control of the automatic control vacuum valve (3), more than one cylinder covered with the spherical crown round bottom tank cover and the inner box assembly (8-3) in the preservation tank door (10) and the cylinder covered with the spherical crown round bottom vacuum tank (8) are automatically vacuumized to the set vacuum of more than 10pa through the automatic control vacuum valve (3) and the vacuumizing main pipeline (4) communicated with the sealing, and then the automatic control vacuum valve (3) is automatically powered off under the atmospheric pressure to stop the vacuum pump, the air inlet valve and the exhaust valve assembly (1). Or a water-cooling calandria assembly (13) with a wind fin is arranged below the lower dustproof air inlet (6-2), the right end of the water-cooling calandria assembly (13) is hermetically connected with an electromagnetic valve connecting line and a tap water inlet pipe (13-2), the left end of the water-cooling calandria assembly (13) is hermetically connected with a water outlet pipe (13-1), and the water outlet pipe (13-1) is hermetically connected with a warm water storage tank (14); a lower circulating air port (6-3) with the diameter of more than 100 mm is manufactured in the right middle part of the lower bottom surface of the outer box body (6), and a fan assembly (12), a fan temperature automatic control switch device assembly (12-1) and a power supply connecting wire (12-2) are installed below a water-cooling calandria assembly (13); the electromagnetic valve connecting wire and the electromagnetic valve connecting wire on the tap water inlet pipe (13-2) are connected in parallel with the power supply connecting wire (12-2) and the left side of the fan temperature automatic control switch device assembly (12-1).

The invention has the beneficial effects that: the manufacturing cost is reduced and the harm to the ozone layer is reduced without using a refrigeration compressor with a refrigerant, the electrode consumption is less during the use, the fresh-keeping time of the refrigerated food is long, and the food does not lose moisture.

Drawings

Fig. 1 is a sectional view of a gable from which an outer case (7) of the present invention is cut away, fig. 2 is a sectional view of a gable from which an outer case (7) of the present invention is cut away with a water-cooled calandria (13) having a set of fins mounted thereon, fig. 3 is a main sectional view of a self-controlled vacuum valve (3), and fig. 4 is a main sectional view of a manually operated intake valve assembly (8-2).

The part numbers in the figures are as follows: a vacuum pump, an air inlet valve and an air outlet valve assembly (1); the vacuum pump is characterized by comprising a vacuum pump connecting line (2), a vacuum pump zero line (2-1), a touch switch (2-2) and a vacuum pump input live wire (2-3); the automatic control vacuum valve comprises an automatic control vacuum valve (3), an internal thread gland (3-1), a vacuum valve shell (3-2), external threads (3-2-1), a conical blind inner hole (3-2), a right exhaust tube (3-2-3), a rectangular spring seat (3-2-4), a left exhaust tube (3-2-5), a power supply lead wiring board and thin fixed contact piece assembly (3-3), a movable contact piece (3-4) which is long left and right of the rectangular concave spring seat, a rectangular compression spring (3-5), a vacuum pump lead wiring board and thin fixed contact piece assembly (3-6), a conical valve body (3-7), a thin convex circular cover (3-7-1) and a convex contact (3-7-2); a main vacuum-pumping pipeline (4); an inner box body and a supporting plate (5); the dust-proof air conditioner comprises an outer box body (6), an upper dust-proof air outlet (6-1), a lower dust-proof air inlet (6-2) and a lower circulating air inlet (6-3); a heat-insulating layer (7); the device comprises a cylindrical and spherical crown round bottom vacuum tank (8), an N-pole magnet (8-1), an S-pole magnet (8-1), an N-pole magnetic rubber ring (8-1-2), an S-pole magnetic rubber ring (8-1-3), a manually-pulled air inlet valve assembly (8-2), a valve casing (8-2-1), a valve rod press cap (8-2), a valve rod (8-2-3), a small spring (8-2-4), a silica gel ring (8-2-5), a spherical crown round bottom tank cover and inner box assembly (8-3) and a handle (8-4); a sealing silicone gasket (9); a fresh-keeping box door (10); an ultraviolet germicidal lamp and lamp holder wiring assembly (11); the automatic fan temperature control system comprises a blowing fan assembly (12), a fan temperature automatic control switch device assembly (12-1) and a power supply connecting wire (12-2); a water-cooling calandria assembly (13), a water outlet pipe (13-1), an electromagnetic valve connecting line and a tap water inlet pipe (13-2); a warm water storage tank (14).

In the embodiment of the invention as shown in fig. 1, 3 and 4, after various foods are respectively filled in more than one spherical crown round bottom tank cover and inner box assembly (8-3) in an assembled vacuum tank food fresh-keeping box, the spherical crown round bottom tank cover and inner box assembly (8-3) are pushed into a cylindrical and spherical crown round bottom vacuum tank (8) and are tightly sealed and buckled by the magnetic attraction of an N-pole magnet (8-1) and an S-pole magnet (8-1); after the vacuum pump input live wire (2-3) and the vacuum pump zero wire (2-1) are connected with the power supply, the fresh-keeping box door (10) is closed, the vacuum pump, the air inlet valve and the air outlet valve assembly (1) are started under the automatic control of the automatic control vacuum valve (3), when the vacuum pumping work is carried out in each spherical crown round bottom tank cover and inner box assembly (8-3) and the cylindrical and spherical crown round bottom vacuum tank (8) which are tightly sealed and buckled together, the ultraviolet germicidal lamp and the lamp holder connecting line assembly (11) are also started for sterilization, when the vacuum degree in the spherical crown round bottom tank cover and inner box assembly (8-3), the cylinder and the spherical crown round bottom vacuum tank (8) reaches the set vacuum, the vacuum pump, the air inlet valve, the exhaust valve assembly (1) and the ultraviolet germicidal lamp and lamp holder connecting assembly (11) are also automatically closed, stopped and extinguished under the control of the automatic control vacuum valve (3). If one wants to take a food in a spherical crown round bottom tank cover and inner box assembly (8-3) and a cylindrical or spherical crown round bottom vacuum tank (8) which are tightly sealed and buckled together, the preservation box door (10) can be opened, at the moment, the touch switch (2-2) cuts off the vacuum pump and inputs the live wire (2-3), the hand on the spherical crown round bottom tank cover and the inner box assembly (8-3) which are tightly and tightly buckled together and need to take food is shifted to one side to shift the air inlet valve assembly (8-2) for a plurality of seconds to enter air, the handle (8-4) can be rotated to make the N pole magnet (8-1) and the S pole magnet (8-1) dislocated without attraction, after the spherical cap round bottom tank cover and the inner box assembly (8-3) are pulled outward to take out the needed food, then the spherical crown round bottom tank cover and inner box assembly (8-3) is pushed into the cylindrical and spherical crown round bottom vacuum tank (8), and the preservation tank door (10) is closed; at the moment, the vacuum pump, the air inlet valve and the exhaust valve assembly (1) are started to vacuumize a certain spherical crown round bottom tank cover and inner box assembly (8-3) which are tightly sealed and buckled together and need to be vacuumized, and the cylindrical and spherical crown round bottom vacuum tank (8) under the automatic control of the automatic control vacuum valve (3).

In the embodiment of the invention as shown in figure 2, figure 3 and figure 4, after more than one spherical crown round bottom tank cover and inner box assembly (8-3) in the assembled vacuum tank food fresh-keeping box are respectively filled with various foods, the spherical crown round bottom tank cover and inner box assembly (8-3) are pushed into a cylindrical and spherical crown round bottom vacuum tank (8) and are tightly sealed and buckled by depending on the magnetic attraction of an N-pole magnetic rubber ring (8-1-2) and an S-pole magnetic rubber ring (8-1-3); after a vacuum pump is input into a power supply connecting wire (12-2) of a live wire (2-3), a vacuum pump zero wire (2-1) and a fan temperature automatic control switch device assembly (12-1) and connected in parallel, and then connected with a power supply, the vacuum pump, an air inlet valve and an exhaust valve assembly (1) are started under the control of an automatic control vacuum valve (3), the spherical crown round bottom tank cover and inner box assembly (8-3) and the cylindrical and spherical crown round bottom vacuum tank (8) which are tightly and hermetically buckled together are vacuumized, simultaneously, an ultraviolet sterilizing lamp and lamp holder connecting wire assembly (11) is also opened for sterilizing, when the vacuum degree in the spherical crown round bottom tank cover and inner box assembly (8-3) and the cylindrical and spherical crown round bottom vacuum tank (8) reaches the set vacuum, the vacuum pump, the air inlet valve, the exhaust valve assembly (1) and the ultraviolet sterilizing lamp and lamp holder connecting wire assembly (11) automatically close the machine under the control of the automatic control vacuum valve (3), and the machine is stopped, And (6) turning off the lamp. When the temperature in the vacuum food can fresh-keeping box reaches the upper limit of the automatic temperature control of the fan temperature automatic control switch device assembly (12-1), the blowing fan assembly (12), the electromagnetic valve connecting line and the tap water inlet pipe (13-2) are automatically opened to carry out blowing cooling through tap water and the blowing fan; the tap water with the increased temperature enters the warm water storage tank (14) to be stored for washing and washing vegetables. If the temperature reaches the lower limit of the automatic temperature control of the fan temperature automatic control switch device assembly (12-1), the fan assembly (12), the connection line of the electromagnetic valve and the tap water inlet pipe (13-2) are automatically closed.