Vacuum pumping structure, vacuum fresh-keeping device and refrigerator

Abstract

The present invention provides a vacuum pumping structure, a vacuum fresh-keeping device and a refrigerator, relating to the technical field of refrigerators, and solving the technical problem in the prior art that the vacuum pumping structure embedded in the refrigerator has only one air extraction port, resulting in inconvenient use. Two or more fresh-keeping box installation positions are formed on the vacuum pumping structure, and two or more matching parts are arranged on the air extraction pipeline of the vacuum pumping structure. The number of the matching parts is the same as that of the fresh-keeping box installation positions, and each fresh-keeping box installation position corresponds to one matching part, so as to simultaneously pump vacuum for two or more fresh-keeping boxes, which is convenient to use and improves the practicability of the vacuum pumping structure. A delay micro-switch is arranged on the fresh-keeping box installation position to realize a unique vacuum pumping start-stop mode, with high automation degree. By arranging the air extraction driving device on the suspended shock-absorbing frame, the noise generated during the operation of the air extraction driving device is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a vacuum pumping structure, a vacuum fresh-keeping device and a refrigerator. Background Art

[0002] Since the birth of refrigerators, the preservation effect has been a popular development direction of refrigerators. Various refrigerator manufacturers have made many explorations in the aspects of atmosphere preservation, photosynthetic preservation, sterilization preservation, vacuum preservation, etc. However, apart from the basic sterilization preservation, few solutions can be widely used and accepted by consumers. The reason is that these solutions are difficult to promote due to various problems. In recent years, the number of refrigerators that apply vacuum technology has increased, but vacuum fresh-keeping refrigerators have not been unanimously recognized by the market, indicating that there are still various problems with the solutions on the market.

[0003] At present, the existing patent discloses a refrigerator, which embeds a vacuum device on the refrigerator door, and the driving device is pre-buried in the lower part of the upper end cover of the refrigerator door, resulting in large noise and vibration, affecting the user experience. In addition, the solution has only one air extraction port and only one matching fresh-keeping box, which greatly reduces the practicality of the device. Summary of the invention

[0004] The purpose of the present invention is to provide a vacuum pumping structure, a vacuum fresh-keeping device and a refrigerator, which solves the technical problem that the vacuum pumping structure embedded in the refrigerator in the prior art is only provided with one air extraction port, which is inconvenient to use. The various technical effects that can be produced by the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a vacuum pumping structure, on which more than two fresh-keeping box installation positions are formed, and on which more than two matching pieces are arranged on an air extraction pipeline of the vacuum pumping structure, and on which a vacuum extraction interface matching with the fresh-keeping box is formed.

[0007] Furthermore, the exhaust pipe forms more than two branch pipes, each of the branch pipes is inserted into the corresponding fitting and sealed with the fitting; a blocking plate is arranged in the fitting, and the blocking plate can be rotated to a position to close the branch pipe port and can be rotated to a position to open the branch pipe port.

[0008] Furthermore, the exhaust pipe is T-shaped, one of the ports of the exhaust pipe is connected to the exhaust drive device of the vacuum structure, and the other two ports of the exhaust pipe arranged in the horizontal direction are respectively provided with the matching parts.

[0009] Furthermore, the matching piece is rotatably connected to the air extraction pipeline, and an opening and closing structure is formed between the matching piece and the air extraction pipeline, so as to change the connection state between the air extraction interface and the air extraction drive device of the vacuum structure when the matching piece is rotated.

[0010] Furthermore, the opening and closing structure includes a blocking plate and a semi-blocking portion, the blocking plate is arranged on the inner side surface of the mating piece, and the semi-blocking portion is arranged on the inner side surface of the tube end of the exhaust pipe that cooperates with the mating piece. When the blocking plate is rotated to cover the semi-blocking portion, the exhaust interface and the exhaust drive device are in a connected state.

[0011] Furthermore, a supporting shaft is provided on a side of the matching component facing away from the air extraction pipeline, and the supporting shaft is rotatably connected to the shell of the vacuum extraction structure.

[0012] Furthermore, a groove structure is arranged on the bottom surface of the vacuum structure to form the fresh-keeping box installation position, and a mounting hole connected to the groove structure is arranged on the side surface of the vacuum structure, and the matching piece is located in the mounting hole.

[0013] Furthermore, the vacuum pumping structure further comprises a suspended vibration damping frame, which is installed in a shell of the vacuum pumping structure, and the vacuum driving device of the vacuum pumping structure is installed on the suspended vibration damping frame.

[0014] Furthermore, the suspended vibration damping frame includes an upper mounting plate, a lower connecting plate and an elastic member, the upper mounting plate is connected to the shell, the lower connecting plate is arranged below the upper mounting plate and the two are connected by the elastic member, a drive device installation area is formed on the lower connecting plate, the air extraction drive device is located in the drive device installation area and the drive device is fixed to the lower connecting plate through the connecting member.

[0015] Furthermore, a delay micro switch is provided on the fresh-keeping box installation position, and the delay micro switch is connected to the control panel of the vacuum structure. When the fresh-keeping box is located at the fresh-keeping box installation position, the delay micro switch can be pressed and triggered.

[0016] Furthermore, the vacuum pumping structure includes an upper shell and a lower shell, the lower shell is arranged below the upper shell and the two are connected, and the vacuum pumping drive device, control panel and battery of the vacuum pumping structure are fixed on the inner side of the upper shell.

[0017] The invention provides a vacuum fresh-keeping device, comprising two or more fresh-keeping boxes and the vacuum pumping structure, wherein the fresh-keeping boxes extend into the fresh-keeping box installation position of the vacuum pumping structure, and the fresh-keeping boxes are provided with a valve body matched with the air extraction interface of the vacuum pumping structure.

[0018] Further, the fresh-keeping box includes a box body and a convex structure. The convex structure is disposed on the top surface of the box body. The convex structure is matched with the installation position of the fresh-keeping box, and the valve body is disposed on the convex structure.

[0019] Further, a groove is disposed on the circumferential side surface of the convex structure for forming a handle.

[0020] Further, the top surface of the convex structure forms a thin-wall structure for observing the pressure inside the fresh-keeping box.

[0021] The present invention provides a refrigerator, including the vacuum fresh-keeping device, and the vacuum fresh-keeping device is disposed inside the refrigerator.

[0022] Further, supporting ribs are disposed on the inner side surface of the refrigerator door body, and the air extraction structure of the vacuum fresh-keeping device is fixed on the supporting ribs; a limiting support structure is disposed on the inner side surface of the refrigerator door body for supporting the fresh-keeping box.

[0023] Further, the supporting ribs are detachably connected to the refrigerator door body and / or the limiting support structure is detachably connected to the refrigerator door body.

[0024] The present invention provides an air extraction structure. Two or more fresh-keeping box installation positions are formed on the air extraction structure. Two or more fitting members are disposed on the air extraction pipeline of the air extraction structure. The number of the fitting members is the same as that of the fresh-keeping box installation positions. Each fresh-keeping box installation position corresponds to one fitting member, so as to simultaneously perform air extraction on two or more fresh-keeping boxes, which is convenient to use and improves the practicability of the air extraction structure.

[0025] The preferred technical solution of the present invention can at least further produce the following technical effects:

[0026] A delay micro switch is disposed on the fresh-keeping box installation position. When the fresh-keeping box is disposed on the fresh-keeping box installation position by rotating the fitting member, the fresh-keeping box will touch the delay micro switch. Since the delay micro switch has a delay function, before the air extraction driving device is started, there is time to rotate the fitting member to connect the air extraction interface on the fitting member to the valve body on the fresh-keeping box. Then, the air extraction driving device is started to perform air extraction on the fresh-keeping box. The air extraction time is set. When the set time is reached, the air extraction driving device stops and the air extraction ends. By adopting a unique air extraction start-stop mode, the degree of automation is high;

[0027] The air extraction structure further includes a suspended damping frame. The suspended damping frame is installed inside the housing of the air extraction structure, and the air extraction driving device of the air extraction structure is installed on the suspended damping frame. By disposing the air extraction driving device on the suspended damping frame, the noise generated when the air extraction driving device works is reduced;

[0028] A thin-walled structure is provided at the top of the fresh-keeping box. Through this design, users can conveniently and intuitively observe the sealing condition of the fresh-keeping box and timely re-vacuumize the air-leaking fresh-keeping box. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a vacuum fresh-keeping device provided by an embodiment of the present invention;

[0032] Figure 3 is an exploded schematic diagram of a vacuum pumping structure provided by an embodiment of the present invention;

[0033] Figure 4 is a top view schematic diagram of a mounting plate on the vacuum pumping structure provided by an embodiment of the present invention;

[0034] Figure 5 is a schematic structural diagram of a fitting arranged on an air extraction pipeline provided by an embodiment of the present invention;

[0035] Figure 6 is Figure 5 a cross-sectional schematic diagram (when the fitting is in the state of opening the pipe orifice);

[0036] Figure 7 is Figure 5 a cross-sectional schematic diagram (when the fitting is in the state of closing the pipe orifice);

[0037] Figure 8 is a schematic structural diagram of a suspended vibration damping frame provided by an embodiment of the present invention;

[0038] Figure 9 is a schematic structural diagram of an air extraction driving device installed on the suspended vibration damping frame provided by an embodiment of the present invention;

[0039] Figure 10 is a schematic structural diagram of a fresh-keeping box provided by an embodiment of the present invention;

[0040] Figure 11 is a cross-sectional schematic diagram of a fresh-keeping box provided by an embodiment of the present invention;

[0041] Figure 12It is a cross-sectional schematic diagram of the vacuum fresh-keeping device provided by an embodiment of the present invention;

[0042] Figure 13 is Figure 12 the partial enlarged view of part A in

[0043] In the figure, 1 is a vacuum pumping structure; 101 is an air extraction pipeline; 102 is a fitting; 103 is an air extraction interface; 104 is a fresh-keeping box installation position; 105 is a baffle; 106 is an air extraction driving device; 107 is a support rotating shaft; 108 is an upper mounting plate; 109 is a lower connecting plate; 110 is an elastic member; 111 is a delay microswitch; 112 is a control board; 113 is an upper housing; 114 is a lower housing; 115 is a storage battery; 116 is a cable tie; 117 is a semi-blocking part; 2 is a fresh-keeping box; 201 is a valve body; 202 is a handle; 203 is a thin-wall structure; 3 is a door body; 4 is a limit support structure; 5 is a refrigerator. Detailed implementation manners

[0044] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0045] The present invention provides a vacuum pumping structure. Two or more fresh-keeping box installation positions 104 are formed on the vacuum pumping structure 1. Two or more fittings 102 are arranged on the air extraction pipeline 101 of the vacuum pumping structure. The number of the fittings 102 is the same as the number of the fresh-keeping box installation positions 104. Each fresh-keeping box installation position 104 corresponds to one fitting 102. An air extraction interface 10 that cooperates with the fresh-keeping box 2 is formed on the fitting 102, so as to simultaneously vacuum two or more fresh-keeping boxes, which is convenient to use and improves the practicability of the vacuum pumping structure. The air extraction driving device 106 can be a vacuum pump.

[0046] Regarding the cooperation between the air extraction pipeline 101 and the fitting 102, the specific structure is as follows: The air extraction pipeline 101 forms two or more branch pipelines. Each branch pipeline is inserted into the corresponding fitting 102 and is in sealed cooperation with the fitting 102. Refer to Figures 5 - 7 , which shows that the air extraction pipeline 101 is in a T shape, that is, the air extraction pipeline 101 forms two branch pipelines. One port of the air extraction pipeline 101 is connected to the air extraction driving device 106, and the other two horizontally arranged ports (i.e., the pipe orifices of the branch pipelines) of the air extraction pipeline 101 are respectively provided with fittings 102. Of course, the number of branch pipelines is not limited to two.

[0047] Preferably, the fitting 102 is rotatably connected to the air extraction pipeline 101, and an opening and closing structure is formed between the fitting 102 and the air extraction pipeline 101 for changing the communication state between the air extraction interface 103 and the air extraction driving device 106 of the air extraction structure 1 when the fitting 102 is rotated.

[0048] Regarding the opening and closing structure, it can be specifically as follows: The opening and closing structure includes a blocking plate 105 and a semi-blocking portion 117. The blocking plate 105 is arranged on the inner side surface of the fitting 102, and the semi-blocking portion 117 is arranged on the inner side surface of the pipe end of the air extraction pipeline 101 that cooperates with the fitting 102. When the blocking plate 105 rotates to block the semi-blocking portion 117 (partially or completely blocking the semi-blocking portion 117), the air extraction interface 103 is in communication with the air extraction driving device 106. See Figures 6 - 7 , which shows the blocking plate 105 inside the fitting 102. See Figure 6 , for the fitting 102 in the state of opening the pipe orifice. At this time, the fresh-keeping box 2 is in communication with the air extraction driving device 106; See Figure 7 , for the fitting 102 in the state of closing the pipe orifice. At this time, the fresh-keeping box 2 is not in communication with the air extraction driving device 106. See Figure 2 , which shows the fresh-keeping box 2 and the air extraction structure. Among them, above the fresh-keeping box 2 (that is, the fitting 102 on the left side is in the state of opening the pipe orifice).

[0049] See Figure 6 , which shows that a semi-blocking portion 117 is arranged on the inner side surface of one end of the air extraction pipeline 101 extending into the fitting 102. The cross-sectional area of the semi-blocking portion 117 can occupy more than half of the cross-sectional area of the air extraction pipeline 101. The horizontal axis of the air extraction pipeline 101 is the rotation axis of the fitting 102. See Figure 7 , the blocking plate 105 blocks the pipe orifice of the air extraction pipeline 101. At this time, the fitting 102 closes the channel between the air extraction interface 103 and the air extraction driving device 106. When the fitting 102 rotates, the pipe orifice of the air extraction pipeline 101 can be gradually opened.

[0050] Regarding the connection between the fitting 102 and the air extraction pipeline 101, the specific description is as follows: Preferably, the fitting 102 and the air extraction pipeline 101 are "tightly fitted", that is, under the action of force, the fitting 102 can be driven to rotate relative to the air extraction pipeline 101. When the fitting 102 is rotated to a certain angle and the hand is released, the fitting 102 can maintain this position. See Figure 2 , for Figure 2The fitting 102 located on the right side of the [specific structure] can be maintained in this position because the fitting 102 is in a "tight fit" with the air extraction pipeline 101. When evacuating the vacuum box, for the fittings not connected to the vacuum box, they can be rotated upward so that the fittings close the corresponding pipe orifices and only open the corresponding pipe orifices on the air extraction pipeline 101 to improve the efficiency of evacuating the vacuum box.

[0051] See Figure 5 , a support rotating shaft 107 is provided on the side of the fitting 102 facing away from the air extraction pipeline 101, and the support rotating shaft 107 is rotatably connected to the housing of the vacuum extraction structure. That is, the opposite sides of the fitting 102 are supported on the housing of the vacuum extraction structure through the support rotating shaft 107 and the air extraction pipeline 101. The support rotating shaft 107 is rotatably connected to the housing, and the fitting 102 is rotatably connected to the air extraction pipeline 101. Rotate the fitting 102 to respectively arrange two or more fresh-keeping boxes 2 at the corresponding fresh-keeping box installation positions 104 (rotate the fitting 102 to avoid the fresh-keeping box 2 and install it at the fresh-keeping box installation position 104), rotate the fitting 102 to connect the air extraction interfaces 103 on the fitting 102 to the valve bodies 201 on the fresh-keeping boxes 2 respectively, and start the air extraction driving device 106 of the vacuum extraction structure 1. The air extraction driving device 106 is a vacuum pump, and it is possible to simultaneously evacuate two or more fresh-keeping boxes 2.

[0052] Specifically, see Figure 3 , a groove structure is provided on the bottom surface of the vacuum extraction structure to form the fresh-keeping box installation position 104, and an installation hole communicating with the groove structure is provided on the side surface of the vacuum extraction structure. The fitting 102 is located in the installation hole. Turn the fitting 102 outward and upward so that the blocking plate 105 closes the branch pipeline port, install the fresh-keeping box 2 at the fresh-keeping box installation position 104, then release the fitting 102, and align the air extraction interface 103 on the fitting 102 with the valve body 201 on the fresh-keeping box 2. At this time, the blocking plate 105 opens the branch pipeline port.

[0053] As an optional implementation manner, the vacuum extraction structure further includes a suspended vibration damping frame. The suspended vibration damping frame is installed inside the housing of the vacuum extraction structure, and the air extraction driving device 106 of the vacuum extraction structure is installed on the suspended vibration damping frame. By arranging the air extraction driving device 106 on the suspended vibration damping frame, the noise generated when the air extraction driving device 106 works is reduced.

[0054] Regarding the structure of the suspended shock absorber, it can be specifically as follows: The suspended shock absorber includes an upper mounting plate 108, a lower connecting plate 109, and an elastic member 110. The upper mounting plate 108 is connected to the housing, and the upper mounting plate 108 is installed on the housing by screws or bolts. The lower connecting plate 109 is disposed below the upper mounting plate 108 and the two are connected by the elastic member 110. A driving device installation area is formed on the lower connecting plate 109. The air extraction driving device 106 is located in the driving device installation area and the driving device is fixed to the lower connecting plate 109 through a connecting member. Refer to Figure 8 , which shows the suspended shock absorber; Refer to Figure 9 , which shows the air extraction driving device 106 installed on the suspended shock absorber. The air extraction driving device 106 is connected to the lower connecting plate 109 through a cable tie 116 and screws or bolts.

[0055] As an optional implementation manner, a delay microswitch 111 is provided on the fresh-keeping box installation position 104. The delay microswitch 111 is connected to the control board 112 of the vacuum pumping structure. When the fresh-keeping box 2 is located at the fresh-keeping box installation position 104, the delay microswitch 111 can be pressed and triggered. Refer to Figure 4 , which shows the delay microswitch 111. The rotation fitting 102 sets the fresh-keeping box 2 at the fresh-keeping box installation position 104, and the fresh-keeping box 2 will touch the delay microswitch 111. Since the delay microswitch 111 has a delay function, before the air extraction driving device 106 is started, there is time to rotate the fitting 102 to connect the air extraction interface 103 on the fitting 102 to the valve body 201 on the fresh-keeping box 2. Then, the air extraction driving device 106 is started to pump vacuum for the fresh-keeping box 2. Set the vacuum pumping time. When the set vacuum pumping time is reached, the air extraction driving device 106 stops and the vacuum pumping ends. After the vacuum pumping is completed, the fresh-keeping box 2 can be taken out. Adopting a unique start-stop method for vacuum pumping, the degree of automation is high and no manual intervention is required during the vacuum pumping process.

[0056] Regarding the housing structure of the vacuum pumping structure, it is specifically as follows: The vacuum pumping structure includes an upper housing 113 and a lower housing 114. The lower housing 114 is disposed below the upper housing 113 and the two are connected. The air extraction driving device 106, the control board 112, and the storage battery 115 of the vacuum pumping structure are fixed on the inner side surface of the upper housing 113. Refer to Figure 3 , which shows the upper housing 113 and the lower housing 114. Openings are formed on the side surfaces of the upper housing 113 and the lower housing 114 to facilitate the formation of installation holes for accommodating the fitting 102. An opening is provided at the bottom of the lower housing 114, and a hole groove structure is formed at the bottom of the upper housing 113. The fresh-keeping box installation position 104 is formed through the opening at the bottom of the lower housing 114 and the hole groove structure at the bottom of the upper housing 113.

[0057] Refer to Figure 4, which shows that the air extraction driving device 106, the control board 112, and the storage battery 115 are fixed on the inner side surface of the upper housing 113, and the storage battery 115, the air extraction driving device 106, and the delay microswitch 111 are all connected to the control board 112.

[0058] The present invention provides a vacuum fresh-keeping device, which includes two or more fresh-keeping boxes 2 and a vacuum extraction structure. The fresh-keeping boxes 2 extend into the fresh-keeping box installation positions 104 of the vacuum extraction structure. The number of fresh-keeping boxes 2 is not less than the number of fresh-keeping box installation positions 104 of the vacuum extraction structure. A valve body 201 that cooperates with the air extraction interface 103 of the vacuum extraction structure is provided on the fresh-keeping box 2.

[0059] Regarding the valve body 201, the valve body 201 is a silica gel valve, and the silica gel valve realizes the sealing, air suction, and air exhaust of the fresh-keeping box 2. During air extraction, the external air pressure decreases. When the external air pressure is less than the air pressure inside the fresh-keeping box 2, the edge of the silica gel valve warps up, and the gas flows out through the air guide groove. After stopping air extraction, the silica gel valve is pressed tightly under the action of air pressure to complete the sealing. When it is necessary to restore the air pressure inside the box, press the top of the silica gel valve, the edge of the silica gel valve warps up, and the gas flows in through the groove, and the air pressure inside the box is restored to the atmospheric pressure.

[0060] See Figure 10 , which shows the fresh-keeping box 2. The fresh-keeping box 2 includes a box body and a convex structure. The convex structure is arranged on the top surface of the box body. The convex structure cooperates with the fresh-keeping box installation position 104, and the valve body 201 is arranged on the convex structure. When the convex structure is located in the fresh-keeping box installation position 104, the convex structure can trigger the delay microswitch 111.

[0061] Preferably, a groove is provided on the circumferential side surface of the convex structure for forming a handle 202. See Figure 10 , which shows the handle 202. The setting of the handle 202 facilitates the user to extract the fresh-keeping box 2; and the structure of the handle 202 is simple and convenient for processing and manufacturing.

[0062] Preferably, the top surface of the convex structure forms a thin-wall structure 203 for observing the pressure inside the fresh-keeping box 2. Through the thin-wall structure 203 of the fresh-keeping box 2, the air pressure inside the box can be judged. When the air pressure inside the box decreases, the depression degree at the top of the fresh-keeping box will increase accordingly. During the storage process of the fresh-keeping box, if the fresh-keeping box leaks air and the air pressure inside the fresh-keeping box increases, the depression degree of the thin-wall structure 203 will gradually decrease. Through this design, the user can conveniently and intuitively observe the sealing condition of the fresh-keeping box and re-vacuum the leaking fresh-keeping box in time.

[0063] A refrigerator includes the vacuum fresh-keeping device provided by the present invention, and the vacuum fresh-keeping device is arranged inside the refrigerator.

[0064] Specifically, support ribs are provided on the inner side surface of the refrigerator door body, and the evacuation structure 1 of the vacuum fresh-keeping device is fixed on the support ribs; a limit support structure 4 is provided on the inner side surface of the refrigerator door body, and the limit support structure 4 is used to support the fresh-keeping box 2. Refer to Figure 1 , which shows that the vacuum fresh-keeping device is arranged on the inner side surface of the refrigerator door body so as not to occupy the space of the refrigerator's fresh food compartment.

[0065] Considering the space on the inner side surface of the refrigerator door body, preferably, the vacuum fresh-keeping device includes two fresh-keeping boxes 2 and the two fresh-keeping boxes are arranged side by side.

[0066] The support ribs and the evacuation structure of the vacuum fresh-keeping device can be connected by screws or bolts. In addition, preferably, the support ribs and the refrigerator door body are detachably connected, so that the height between the support ribs and the limit support structure 4 can be adjusted to adapt to fresh-keeping boxes 2 of different heights. A clamping structure can be provided on the inner side surface of the refrigerator door body, and more than two clamping structures are arranged along the height direction, and the support ribs can be clamped on the clamping structures. Regarding the clamping structure, no detailed description is made here, and the clamping structure in the prior art can be adopted.

[0067] Of course, it can also be set that the limit support structure 4 and the refrigerator door body are detachably connected to adjust the height between the support ribs and the limit support structure 4 to adapt to fresh-keeping boxes 2 of different heights.

[0068] Refer to Figure 2 , which shows the limit support structure 4. When it is necessary to evacuate the fresh-keeping box 2, adjust the distance between the support ribs and the limit support structure 4 to a suitable distance, and then rotate the fitting 102 of the evacuation structure 1 upward to push the convex structure at the top of the fresh-keeping box 2 into the evacuation structure 1 of the evacuation structure. At this time, the fresh-keeping box 2 is supported on the limit support structure 4. Then rotate the fitting 102 downward so that the air extraction interface 103 on the fitting 102 is connected to the valve body 201 on the fresh-keeping box 2. Since the convex structure of the fresh-keeping box 2 touches the delay microswitch 111, the air extraction driving device 106 is started to evacuate the fresh-keeping box 2. When the set evacuation time is reached, the air extraction driving device 106 stops and the evacuation ends.

[0069] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the said claims.

Claims

1. A vacuum pumping structure, characterized in that, More than two fresh-keeping box installation positions (104) are formed on the vacuum pumping structure (1), more than two matching pieces (102) are arranged on the vacuum pumping pipeline (101) of the vacuum pumping structure, and a vacuum port (103) matching with the fresh-keeping box (2) is formed on the matching piece (102); The matching piece (102) is rotatably connected to the air extraction pipeline (101), and an opening and closing structure is formed between the matching piece (102) and the air extraction pipeline (101), so as to change the connection state between the air extraction interface (103) and the air extraction drive device (106) of the vacuum extraction structure (1) when the matching piece (102) is rotated; The opening and closing structure comprises a blocking plate (105) and a semi-blocking portion (117); the blocking plate (105) is arranged on the inner side surface of the matching piece (102); the semi-blocking portion (117) is arranged on the inner side surface of the pipe end of the exhaust pipe (101) that matches the matching piece (102); when the blocking plate (105) is rotated to cover the semi-blocking portion (117), the exhaust interface (103) and the exhaust drive device (106) are in a connected state.

2. The vacuum pumping structure according to claim 1, wherein The air extraction pipeline (101) forms more than two branch pipelines, and each branch pipeline is inserted into the corresponding matching piece (102) and is sealed with the matching piece (102).

3. The vacuum pumping structure according to claim 2, characterized in that, The exhaust pipe (101) is T-shaped, one of the ports of the exhaust pipe (101) is connected to the exhaust drive device (106) of the vacuum pumping structure, and the other two ports of the exhaust pipe (101) arranged in the horizontal direction are respectively provided with the matching parts (102).

4. The vacuum pumping structure according to claim 1, wherein, A supporting shaft (107) is provided on a side of the matching component (102) facing away from the air extraction pipeline (101), and the supporting shaft (107) is rotatably connected to the shell of the vacuum extraction structure.

5. The vacuum pumping structure according to claim 1, characterized in that, A groove structure is arranged on the bottom surface of the vacuum structure to form the fresh-keeping box installation position (104), and a mounting hole connected to the groove structure is arranged on the side surface of the vacuum structure, and the matching piece (102) is located in the mounting hole.

6. The vacuum pumping structure according to claim 1, wherein, The vacuum pumping structure further comprises a suspended vibration damping frame, which is installed in a shell of the vacuum pumping structure, and a vacuum driving device (106) of the vacuum pumping structure is installed on the suspended vibration damping frame.

7. The vacuum pumping structure according to claim 6, wherein The suspended vibration damping frame comprises an upper mounting plate (108), a lower connecting plate (109) and an elastic member (110); the upper mounting plate (108) is connected to the shell; the lower connecting plate (109) is arranged below the upper mounting plate (108) and the two are connected via the elastic member (110); a drive device mounting area is formed on the lower connecting plate (109); the air extraction drive device (106) is located in the drive device mounting area and the drive device (106) is fixed to the lower connecting plate (109) via a connecting member.

8. The vacuum pumping structure according to claim 1, characterized in that A delay microswitch (111) is provided on the fresh-keeping box installation position (104). The delay microswitch (111) is connected to the control board (112) of the vacuum pumping structure. When the fresh-keeping box (2) is located at the fresh-keeping box installation position (104), the delay microswitch (111) can be pressed and triggered.

9. The vacuum pumping structure according to claim 1, wherein The vacuum pumping structure includes an upper housing (113) and a lower housing (114). The lower housing (114) is arranged below the upper housing (113) and the two are connected. The air extraction driving device (106), the control board (112) and the storage battery (115) of the vacuum pumping structure are fixed on the inner side surface of the upper housing (113).

10. A vacuum preservation device, characterized in that, It includes two or more fresh-keeping boxes (2) and the vacuum pumping structure according to any one of claims 1-9. The fresh-keeping box (2) extends into the fresh-keeping box installation position (104) of the vacuum pumping structure, and a valve body (201) matching the air extraction interface (103) of the vacuum pumping structure is arranged on the fresh-keeping box (2).

11. The vacuum fresh-keeping device according to claim 10, characterized in that, The fresh-keeping box (2) includes a box body and a convex structure. The convex structure is arranged on the top surface of the box body. The convex structure is matched with the fresh-keeping box installation position (104), and the valve body (201) is arranged on the convex structure.

12. The vacuum preservation device according to claim 11, characterized in that, A groove is arranged on the circumferential side surface of the convex structure for forming a handle (202).

13. The vacuum fresh-keeping device according to claim 11, characterized in that, The top surface of the convex structure forms a thin-wall structure (203) for observing the pressure inside the fresh-keeping box (2).

14. A refrigerator, characterized in that, It includes the vacuum fresh-keeping device according to any one of claims 10-13. The vacuum fresh-keeping device is arranged inside the refrigerator.

15. The refrigerator according to claim 14, wherein, Support ribs are arranged on the inner side surface of the refrigerator door body. The vacuum pumping structure (1) of the vacuum fresh-keeping device is fixed on the support ribs; a limit support structure (4) is arranged on the inner side surface of the refrigerator door body, and the limit support structure (4) is used for supporting the fresh-keeping box (2).

16. The refrigerator according to claim 15, characterized in that, The support ribs are detachably connected to the refrigerator door body and / or the limit support structure (4) is detachably connected to the refrigerator door body.

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