CN111473577A

CN111473577A - Refrigerator with a door

Info

Publication number: CN111473577A
Application number: CN202010304714.7A
Authority: CN
Inventors: 杨春; 张鹏
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-07-31
Also published as: WO2021208428A1

Abstract

The invention provides a refrigerator, which comprises a low-temperature storage chamber, a low-pressure storage unit, a vacuum pump and an air leakage prevention unit, wherein the low-pressure storage unit, the vacuum pump and the air leakage prevention unit are positioned in the low-temperature storage chamber; the radial dimension of the floating column is smaller than that of the first through hole, and the floating column and the upright column define an air exhaust channel together; a shield is sleeved outside the outer end part; the inner cavity of the shield is communicated with the air exhaust channel and the vacuum pump; the floating column can reciprocate along the first through hole under the action of air pressure so as to open or close the air outlet; the invention can open the air outlet when the vacuum pump exhausts air and close the air outlet when the air exhaust is finished, thereby effectively avoiding air leakage of the low-pressure storage unit caused by the fact that air enters the low-pressure storage unit through the vacuum pump after the air exhaust is finished.

Description

Refrigerator with a door

Technical Field

The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator.

Background

Refrigerators occupy an important share of the market as indispensable electric appliances in home life. With the increasing requirements of consumers on the quality of fresh food, the requirements on refrigerators are also increasing, and refrigerators are required to have higher configuration and stronger functions, and especially, it is desirable that the stored fresh food can have a longer storage period, so that the freshness of food materials is ensured, and the loss of nutritional ingredients is prevented.

In order to better store the food, it has been developed to provide a vacuum chamber in the refrigerator, and the vacuum chamber is vacuumized by a vacuuming device. The main function of the vacuum is to remove oxygen from the vacuum chamber to prevent food from deteriorating. When the vacuum chamber is in a negative pressure state, gas is sucked back into the gas inlet through the gas outlet of the vacuum pump, and the gas is discharged into the vacuum chamber, so that gas leakage of the vacuum chamber is caused.

The invention is provided in view of the above.

Disclosure of Invention

The invention provides a refrigerator aiming at the technical problems.

In order to achieve the purpose, the invention adopts the technical scheme that:

a refrigerator, comprising:

the low-temperature storage compartment is surrounded by the inner container;

the low-pressure storage unit is positioned in the low-temperature storage room and can be pumped to form air pressure lower than the external atmospheric pressure of the refrigerator so as to be beneficial to the fresh keeping of food;

the vacuum pump is communicated with the low-pressure storage unit and is used for pumping out air in the low-pressure storage unit;

leak protection gas unit, it includes:

a pillar formed on the low pressure storage unit and having an inner end portion positioned inside the low pressure storage unit and an outer end portion positioned outside the low pressure storage unit;

the first through hole penetrates through the upright column, and an air outlet is formed at the outer end part of the upright column;

the floating column is arranged in the first through hole; the radial dimension of the floating column is smaller than that of the first through hole, and the floating column and the upright column define an air exhaust channel together;

the second baffle is arranged at one end of the floating column and is used for being matched with the outer end part so as to open or close the air outlet;

the blocking cover is sleeved outside the outer end part and is in sealing connection with the low-pressure storage unit; the inner cavity of the baffle cover is communicated with the air pumping channel and the vacuum pump;

when the low-pressure storage unit is used for exhausting air, the floating column moves towards the direction close to the vacuum pump under the action of air pressure, the second baffle is separated from the outer end part, and the air outlet is opened; the air of the low-pressure storage unit sequentially passes through the air extraction channel, the air outlet, the inner cavity of the baffle cover and the vacuum pump;

when the low-pressure storage unit stops pumping air, the floating column moves far away from the vacuum pump under the action of air pressure, the second baffle plate is in sealing fit with the outer end part, and the air outlet is closed.

Preferably, the outer end has a protruding sharp part, the sharp part includes a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface intersect to form a protruding edge surrounding the outer end and used for being matched with the second baffle plate; the first inclined plane is connected with the inner wall surface, close to the first through hole, of the outer end portion of the ridge, and the second inclined plane is connected with the outer wall surface, far away from the first through hole, of the outer end portion of the ridge.

Preferably, a vent is arranged on the side wall of the inner end part.

Preferably, a first baffle plate is arranged at one end, far away from the blocking cover, of the floating column, and an accommodating groove for accommodating the upright column is formed between the first baffle plate and the second baffle plate; the first baffle is used for being matched with the inner end part of the upright post.

Preferably, under the condition that the floating column is not affected by external force, the width of the accommodating groove is larger than the length of the upright column.

Preferably, the floating column is provided with a blind hole, and the open end of the blind hole is arranged at one end of the blind hole far away from the blocking cover.

Preferably, the baffle cover comprises a bottom wall and a side baffle wall surrounding the bottom wall; the bottom wall is provided with a connecting pipe communicated with the two sides of the bottom wall, and the connecting pipe is communicated with the vacuum pump; the side retaining wall is sleeved outside the outer end part of the upright post.

Preferably, a sealing ring is arranged between the side blocking wall of the blocking cover and the low-pressure storage unit.

Preferably, the pressure storage unit is provided with a screw column, and the screw column is arranged on the periphery of the outer end part;

the side wall of the blocking cover is provided with a matching plate, the matching plate is provided with a screw hole corresponding to a screw column on the low-pressure storage unit, and the blocking cover and the low-pressure storage unit are fixed through screws.

Preferably, a convex ring is arranged around the outer end part of the upright post, and the baffle cover is sleeved outside the convex ring.

Compared with the prior art, the invention has the advantages and positive effects that:

the invention provides a refrigerator, which comprises a low-temperature storage chamber, a low-pressure storage unit, a vacuum pump and an air leakage prevention unit, wherein the low-pressure storage unit, the vacuum pump and the air leakage prevention unit are positioned in the low-temperature storage chamber; the radial dimension of the floating column is smaller than that of the first through hole, and the floating column and the upright column define an air exhaust channel together; a shield is sleeved outside the outer end part; the inner cavity of the shield is communicated with the air exhaust channel and the vacuum pump; the floating column can reciprocate along the first through hole under the action of air pressure so as to open or close the air outlet; the air outlet can be opened when the vacuum pump exhausts air, and closed when the air exhaust is finished, so that air leakage of the low-pressure storage unit caused by the fact that air enters the low-pressure storage unit through the vacuum pump after the air exhaust is finished is effectively avoided, the overall performance of the refrigerator is optimized, and user experience is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a refrigerator according to the present invention;

FIG. 2 is a schematic view of a portion of the refrigerator according to the present invention;

FIG. 3 is a schematic diagram of the relative position structure of the drain pipe and the inner container of the refrigerator of the present invention;

FIG. 4 is a schematic diagram illustrating the relative positions of the vacuum pump assembly, the low pressure storage unit and the drain pipe of the refrigerator according to the present invention;

FIG. 5 is another angular relative position of the vacuum pump assembly and the low pressure storage unit and the drain pipe of the refrigerator according to the present invention;

FIG. 6 is a view showing the relative positions of a vacuum pump assembly, a low pressure storage unit, a drain pipe and a muffler of the refrigerator according to the present invention;

FIG. 7 is a schematic diagram showing the relative position between the air leakage preventing unit and the low pressure storage unit of the refrigerator according to the present invention;

fig. 8 is a partial sectional view of an air leakage preventing unit of a refrigerator according to the present invention;

FIG. 9 is an exploded view of an air leakage preventing unit of the refrigerator according to the present invention;

FIG. 10 is an exploded view of another view of the air leakage preventing unit of the refrigerator according to the present invention;

FIG. 11 is a schematic diagram of the relative positions of the air leakage preventing unit, the air leakage preventing unit and the vacuum pump of the refrigerator according to the present invention;

FIG. 12 is an enlarged view of the area B of FIG. 11;

FIG. 13 is a schematic structural view of a floating member of an air leakage preventing unit of a refrigerator according to the present invention;

FIG. 14 is a schematic view of another perspective of the float member of the air leakage preventing unit of the refrigerator according to the present invention

FIG. 15 is a schematic diagram of a relative position between a second fixing member and an inner container of the refrigerator according to the present invention;

FIG. 16 is a schematic structural view of a vacuum pump assembly and a liner of the refrigerator according to the present invention;

FIG. 17 is another schematic structural view of the vacuum pump assembly and the inner container of the refrigerator according to the present invention;

FIG. 18 is an exploded view of the vacuum pump assembly, the first fixing member and the second fixing member of the refrigerator according to the present invention;

FIG. 19 is an exploded view of the pump casing of the refrigerator in accordance with the present invention;

FIG. 20 is a schematic view of a vacuum pump assembly and a first fixing member of the refrigerator according to the present invention;

FIG. 21 is a schematic view of an assembly structure of a vacuum pump assembly and a liner of the refrigerator according to the present invention;

fig. 22 is an enlarged view of the area a in fig. 21.

In the above figures:

a refrigerator 1; a box body 2; a housing 2 a; an inner container 2 b; a mounting hole 21; an accommodating chamber 22; a separation space 23; a refrigerating chamber 10; a freshness retaining container 11; a low-pressure storage unit 12; a housing 4; a door body 5; a drain pipe 13; a vacuum pump 3; a first pipe 14; a second pipe 15; a suction pipe 16; an exhaust pipe 17; a pump housing 6; a connecting plate 61; the mounting notches 61 a; a first housing 6 a; a second housing 6 b; an elastic body 7; a first fixing member 8; a fixed plate 81 a; a fixing through hole 81 c; a mounting groove 82; a projection 83; a second fixing member 9; a stopper portion 91 a; a fixed hook 91 b; an isolated space 92; an elastic pad 18; a muffler 24; an air leakage prevention unit 40; the upright 41; an inner end portion 41 a; outer end portions 41 b; the first through-hole 42; the air outlet 42 a; the air port 42 b; a sharp portion 43; the first slope 43 a; the second slope 43 b; a ridge 44; a convex ring 51; a shield 52; a seal ring 53; a bottom wall 52 a; the connection pipe 52 c; side blocking walls 52 b; a mating plate 52 d; a screw post 55; a float member 56; a floating column 57; a blind hole 57 a; an air extraction channel 70; a first baffle plate 58; a second shutter 59; and a receiving groove 50.

Detailed Description

The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the scope of the present invention as claimed is not limited to the scope described in the specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1-2, a refrigerator 1, the refrigerator 1 includes a heat-insulating box 2, the box 2 includes a casing 2a, an inner container 2b and a heat-insulating layer (not shown) therebetween. The cabinet 2 defines a plurality of insulated low-temperature storage compartments to store food and the like. In the present embodiment, these low-temperature storage compartments are a refrigerating compartment 10 located at the upper portion and a freezing compartment located at the bottom portion, respectively. The low-temperature storage compartments may be closed by respective corresponding door. The refrigerating chamber 10 is provided with a refrigerating side-by-side door, and the freezing chamber is provided with a freezing side-by-side door.

It should be understood that the invention should not be limited to a particular distribution of the storage compartments of the refrigerator 1, but that the invention may also be applied to other forms of refrigerator 1, such as a refrigerator 1 with a drawer door, etc.

The refrigerator 1 has an evaporative refrigeration system forming a closed loop. The refrigeration system includes at least a compressor (not shown), a condenser (not shown), a throttle device (not shown), and an evaporator (not shown). Since such a refrigeration system is well known in the art, further description thereof is omitted. Of course, other types of refrigeration systems (e.g., absorption refrigeration systems, thermoelectric refrigeration systems) may be used with the refrigerator 1.

The refrigerator 1 is provided with a low pressure storage unit 12 which can be maintained in a low pressure state and a vacuum pump assembly for pumping gas from the inside of the low pressure storage unit 12. The vacuum pump assembly may include a vacuum pump 3 and a pipe connected between the vacuum pump 3 and the low pressure storage unit 12.

In the present embodiment, the low pressure storage unit 12 is provided inside the refrigerating compartment 10. It should be understood that in other embodiments, the low pressure storage unit 12 may be disposed in other low temperature storage compartments, such as a temperature-changing compartment having a temperature range that is switchable between a refrigerated temperature zone and a frozen temperature zone.

The low pressure storage unit 12 is located at the bottom of the refrigerating compartment 10 and is supported on the bottom wall 52a of the refrigerating compartment 10. A fresh-keeping container 11 with high humidity and suitable for keeping foods such as vegetables and the like can be arranged at the adjacent position of the low-pressure storage unit 12; the low pressure storage unit 12 is provided at the bottom of the refrigerating compartment 10 in parallel with the fresh food container 11.

The low pressure storage unit 12 may be assembled in the cabinet 2 after being constructed independently of the cabinet 2. Referring to fig. 2, in the present embodiment, the low pressure storage unit 12 has a substantially flat rectangular parallelepiped shape, and the sum of the width of the low pressure storage unit 12 and the width of the fresh food container 11 is slightly smaller than the width of the refrigerating compartment 10, so that the bottom space of the refrigerating compartment 10 is effectively allocated, and both the fresh food container 11 and the low pressure storage unit 12 can be inserted into the refrigerating compartment 10 or pulled out of the refrigerating compartment 10.

The low pressure storage unit 12 includes a case 4 fixed in the refrigerating chamber 10 and a door 5 connected to the case 4 and movable into and out of the refrigerating chamber 10.

Referring to fig. 2, the housing 4 has a box-shaped structure defining a flat low-pressure storage compartment having a food access opening. In this embodiment, the access opening is located at the front end of the housing 4 facing the user. The latticed reinforcing ribs are arranged on the outer side of the box wall of the shell 4 to increase the strength of the box wall of the shell 4 and avoid deformation of the shell 4 caused by the difference between the internal pressure and the external pressure after vacuumizing.

Door 5 may be provided with an annular sealing member to form an airtight joint between housing 4 and door 5 when door 5 is in the closed position, preventing gas from entering the low-pressure storage chamber from the joint between housing 4 and door 5. The sealing element may also be arranged at the front end of the housing 4.

When the low pressure storage chamber is closed by the door 5 and the vacuum pump assembly is started, the gas in the low pressure storage chamber is extracted and the low pressure storage chamber is in a low pressure state. According to a preferred embodiment of the present invention, at the end of the evacuation process, the pressure within the low pressure storage chamber is between one standard atmosphere and absolute vacuum. The skilled person also colloquially refers to the "vacuum chamber" as the pressure in the low pressure storage chamber is lower than the standard atmospheric pressure.

The door body 5 is a drawer type door, and the door body 5 may be pushed toward the case 4 to close the access port of the low pressure storage chamber or pulled out to open the low pressure storage chamber. The rear side of the door body 5 is connected with a tray-shaped article container for placing articles. The user obtains items located in the low pressure storage unit 12 or stores items in the low pressure storage unit 12 by pushing or pulling the storage container into or out of the low pressure storage compartment. The door 5 and the storage container together constitute a drawer unit that can be pushed into and pulled out of the housing 4.

As shown in fig. 3 to 6, the refrigerator 1 has a drain pipe 13 for draining condensed water inside the refrigerator 1. One end of the vacuum pump assembly is communicated with the low pressure storage unit 12, and the other end is communicated with a drain pipe 13 of the refrigerator 1. The vacuum pump assembly operates to pump out the air in the low pressure storage unit 12 and transfer it to the drain pipe 13, and finally, it is discharged out of the refrigerator 1 through the drain pipe 13. So as to avoid the air pumped out from the low-pressure storage unit 12 directly discharging into the refrigerator 1 to make the foods in other areas in the refrigerating chamber 10 taint with each other and affect the fresh-keeping effect of the foods.

The vacuum pump assembly includes a vacuum pump 3, a first pipe 14 connecting the vacuum pump 3 and the low pressure storage unit 12, and a second pipe 15 connecting the vacuum pump 3 and the drain pipe 13, wherein a silencer 24 is provided on the second pipe 15.

The vacuum pump assembly is provided on the inner container 2b of the refrigerating chamber 10 near the bottom of the low pressure storage unit 12. The upper part of the back wall of the inner container 2b of the refrigerating chamber 10 is recessed backwards to form an accommodating cavity 22 for accommodating a vacuum pump assembly; the area of the inner container 2b close to the containing cavity 22 is provided with a mounting hole 21 for fixing the vacuum pump assembly. In this embodiment, the vacuum pump assembly is located in the accommodating chamber 22, and a separation space 23 is formed between the vacuum pump assembly and the chamber wall of the accommodating chamber 22, so as to reduce direct contact between the vacuum pump assembly and the inner container 2b, reduce transmission of vibration, and effectively reduce noise.

The vacuum pump assembly comprises a vacuum pump 3, a pump shell 6 and an elastic body 7 sleeved between the vacuum pump 3 and the pump shell 6. The vacuum pump 3 is provided with an air suction pipe 16 communicated with the first pipeline 14 and an exhaust pipe 17 communicated with the second pipeline 15. The exhaust pipe 16 is arranged in parallel with the exhaust pipe 17 and is located at the same end of the vacuum pump 3. When the vacuum pump is operated, the air in the low-pressure storage unit 12 is sequentially conveyed to the drain pipe 13 through the first pipeline 14, the air suction pipe 16, the vacuum pump 3, the exhaust pipe 17, the second pipeline 15 and the silencer 24 arranged on the second pipeline 15, and finally is discharged out of the box body 2 through the drain pipe 13. In the embodiment, the outer side of the vacuum pump is sleeved with the elastic body, and the elastic body can absorb the vibration on the vacuum pump so as to reduce the noise generated when the vacuum pump works; in addition, be equipped with muffler 24 on the second pipeline to further noise absorption, in order to optimize the wholeness ability of refrigerator, improve user experience.

As shown in fig. 7 to 14, the refrigerator 1 has an air leakage preventing unit 40 disposed at the back of the low pressure storage unit 12, and the air leakage preventing unit 40 can prevent air leakage caused by negative pressure formed in the low pressure storage unit 12 after vacuum pumping. In the conventional structure, when the low pressure storage unit 12 is in a negative pressure state after evacuation, gas is sucked back into the gas exhaust pipe 16 through the gas exhaust pipe 17 of the vacuum pump 3 and is exhausted into the low pressure storage unit 12 through the gas exhaust pipe 16, which causes gas leakage in the low pressure storage unit 12 and reduces the evacuation efficiency. The air leakage prevention unit 40 of the embodiment can effectively prevent air leakage caused by suck-back, thereby ensuring the vacuum degree of the low-pressure storage unit 12 and ensuring the fresh-keeping effect of food.

The air leakage preventing unit 40 has a pillar 41 protruded from the rear wall of the low pressure storage unit 12, and the pillar 41 includes an inner end portion 41a positioned inside the low pressure storage chamber 14 and an outer end portion 41b positioned outside the low pressure storage unit 12; the pillar 41 has a first through hole 42 communicating with the low pressure storage chamber 14 of the low pressure storage unit 12; the first through hole 42 penetrates the upright column 41, and an air outlet 42a is formed at the outer end part 41 b; the inner end part 41a is provided with a plurality of air vents 42b, and the air vents 42b are distributed around the inner end part 41 a; in this embodiment, the vent 42b is provided as a notch, and a plurality of notches are distributed around the inner end portion 41a and penetrate the column side wall of the inner end portion 41a of the upright 41. The outer end portion 41b has a projecting sharp portion 43, the sharp portion 43 includes a first inclined surface 43a and a second inclined surface 43b, and the first inclined surface 43a and the second inclined surface 43b intersect to form a protruding edge 44 surrounding the outer end portion 41b of the upright 41; the first inclined surface 43a connects the ridge 44 and the outer end 41b to the inner wall surface of the first through hole 42, and the second inclined surface 43b connects the ridge 44 and the outer end 41b to the outer wall surface of the first through hole 42. Wherein, the rear wall of the low pressure storage unit 12 is provided with screw columns 55, and the screw columns 55 are distributed on the periphery of the outer end portion 41b of the upright 41.

A convex ring 51 is arranged around the outer end part 41b of the upright post 41, and a shield 52 is arranged outside the convex ring 51; a packing 53 is provided between the shield 52 and the rear wall of the low pressure storage unit 12 to ensure the sealing property of the connection between the shield 52 and the low pressure storage unit 12. The inner cavity of the baffle cover 52 is communicated with the first through hole 42 and the vacuum pump 3; the shield 52 includes a bottom wall 52a and a side shield wall 52b disposed around the bottom wall 52 a; the bottom wall 52a is provided with a connecting pipe 52c communicated with the two sides of the bottom wall, and the connecting pipe 52c is communicated with the exhaust pipe 16 of the vacuum pump 3; the side blocking wall 52b is sleeved outside the outer end 41b of the upright 41 and is matched with the sealing ring 53. The side blocking wall 52b is provided with an engaging plate 52d, the engaging plate 52d is provided with screw holes corresponding to the screw posts 55 on the rear wall of the low pressure storage unit 12, and the blocking cover 52 is fixed to the rear wall of the low pressure storage unit 12 by screws.

The floating member 56 is installed in the first through hole 42 of the column 41, and the floating member 56 reciprocates along the center axis of the first through hole 42 under pressure to open or close the first through hole 42.

The floating member 56 comprises a floating column 57, the radial dimension of the floating column 57 is smaller than that of the first through hole 42, so as to form an air exhaust channel 70 between the floating column 57 and the upright column 41; the suction passage 70 communicates with the inner cavity of the shield 52 through the air outlet 42 a. The floating column 57 has a first baffle 58 at one end and a second baffle 59 at the other end, and a receiving groove 50 is formed between the first baffle 58 and the second baffle 59. The floating column 57 of the floating piece 56 is arranged in the first through hole 42 of the upright column 41, the upright column 41 is arranged in the accommodating groove 50, the first baffle plate 58 is matched with the inner end part 41a of the upright column 41, and the second baffle plate 59 is matched with the outer end part 41b of the upright column 41; the arrangement of the ridge 44 reduces the contact area between the end of the upright 41 and the second baffle 59 of the floating member 56, and effectively ensures the sealing performance of the contact fit between the outer end 41b of the upright 41 and the second baffle 59 of the floating member 56. The floating column 57 of the floating member 56 is provided with a blind hole 57a to reduce the wall thickness of the floating member 56; i.e. reducing the overall weight of the float member 56 to ensure that it moves under pressure differentials. In this embodiment, the open end of the blind hole 57a is disposed at an end of the floating member 56 away from the shield 52. The air in the low-pressure storage unit 12 passes through the air exhaust passage 70, the air outlet 42a, the inner cavity of the shield 52, and the vacuum pump 3 in sequence.

The floating member 56 is provided as an elastic material member to deform when the floating member 56 is acted on by an external force and the protruding rib 44, so as to ensure that the floating member 56 is in close contact with the protruding rib 44; while ensuring that the floating member 56 recovers from the ridge 44 after separation. In this embodiment, the floating member 56 is a silicone material, which has better resilience.

When the air extracting device extracts air, the floating member 56 moves backwards under the action of the difference between the internal pressure and the external pressure, the second baffle 59 is separated from the protruding rib 44, the air outlet 42a is opened, the air extracting channel 70 is opened, air in the low-pressure storage unit 12 enters the air extracting channel 70 through the vent hole 42b (gap) on the inner end 41a of the upright post 41, enters the inner cavity of the baffle cover 52 through the gap between the second baffle 59 and the protruding rib 44, finally enters the first pipeline 14 through the connecting pipe 52c, and then is discharged through the air extracting pipe 16, the vacuum pump 3, the exhaust pipe 17, the second pipeline 15 and the drain pipe 13 in sequence.

After the air pumping is finished, the external pressure is greater than the internal pressure of the low-pressure storage unit 12, the floating piece 56 moves towards the inside of the low-pressure storage unit 12 under the action of the pressure, the second baffle 59 on the floating piece 56 is in sealing fit with the ridge 44, the air outlet 42a is closed, and the air pumping channel 70 is closed, so that the air is effectively prevented from entering the low-pressure storage unit 12 through the exhaust pipe 17 and the exhaust pipe 16 of the vacuum pump 3, and the air leakage of the low-pressure storage unit 12 is caused.

The groove width of the accommodating groove 50 when the floating member 56 is in the natural state is not less than the whole length of the upright post 41, so as to ensure that the floating member 56 has a moving space along the central axis direction of the upright post 41 under the action of the internal and external pressure difference, thereby enabling the second baffle 59 and the ridge 44 to be in a sealing fit and separation state, i.e. ensuring that the first through hole 42 (the vent 42b) is in an open state during air extraction and the first through hole 42 (the vent 42b) is in a closed state when the air extraction is finished.

When the groove width of the accommodating groove 50 is smaller than the entire length of the upright post 41 when the floating member 56 is in a natural state (not affected by external force), it is necessary to ensure that the deformation amount when the floating member 56 is installed in the first through hole 42 and not affected by other external force is smaller than the maximum deformation amount of the floating member 56; so as to ensure that the second baffle 59 and the ridge 44 are separated when the floating member 56 moves outward along the central axis of the column 41 under the action of the internal and external pressure difference, i.e. to ensure that the first through hole 42 (the air vent 42b) is in an open state during air extraction. Specifically, the arrangement is adopted in which the width of the receiving groove 50 is larger than the entire length of the vertical column 41 when the floating column 57 is not subjected to an external force.

The air leakage preventing unit 40 arranged above opens the first through hole 42 (the air vent 42b) during air extraction under the action of the low pressure storage unit 12, and closes the first through hole 42 (the air vent 42b) after air extraction is finished; the air leakage prevention unit 40 can effectively avoid air leakage caused by back suction, ensure the vacuum degree of the low-pressure storage unit 12 and ensure the fresh-keeping effect of food.

Referring to fig. 15 to 22, in the present embodiment, the pump housing 6 includes a first housing 6a and a second housing 6b, and the first housing 6a and the second housing 6b are engaged to be mounted outside the elastic body 7. The pump shell 6 is arranged in a split mode, and is convenient to disassemble and assemble.

The pump shell 6 is provided with a connecting plate 61 fixed with the inner container 2 b; the end of the connecting plate 61 remote from the central axis of the pump housing 6 is provided with a mounting notch 61 a. Along the direction of keeping away from pump case 6 center pin, the region that installation breach 61a is close to connecting plate 61 border is the shrink form, and above setting up can ensure that installation breach 61a has sufficient accommodation space to can effectively fix the installation component in it, avoid droing. In this embodiment, the projection shape of the mounting notch 61a on the connecting plate 61 is a major arc. In the present embodiment, the connection plate 61 is provided on the outer periphery of the first housing 6 a; wherein, the two edges where the first shell 6a and the second shell 6b are butted are both provided with a connecting plate 61.

The refrigerator comprises a first fixing piece 8 and a second fixing piece 9 which are matched with each other; wherein, the first fixed part 8 is fixedly connected with the connecting plate 61 of the pump shell 6, and the first fixed part 8 is arranged on the inner wall of the inner container 2 b; the second fixing member 9 is installed at the outer side of the inner container 2b, and is matched with the first fixing member 8 after passing through the installation hole 21, so as to fix the vacuum pump assembly on the inner container 2 b.

The first fixing member 8 includes a fixing column, fixing plates 81a disposed at both ends of the fixing column, and fixing through holes 81c penetrating the fixing column and the fixing plates 81 a; an annular mounting groove 82 is formed between the fixing plates 81a provided at both end portions of the fixing post. The fixing column of the first fixing member 8 is mounted in the mounting notch 61a of the pump case 6, and the connecting plate 61 of the pump case 6 is mounted in the mounting groove 82 of the first fixing member 8. The size of the fixing plate 81a is larger than the size of the mounting hole 21 of the inner container 2 b. In this embodiment, the fixing plate 81a is provided with a protrusion 83 on the end surface away from the fixing column, so as to reduce the contact area between the fixing plate 81a and the inner container 2b and improve the contact stability.

The second fixing member 9 includes a stopping portion 91a, and a plurality of fixing hooks 91b separately arranged are disposed on one side of the stopping portion 91 a. The fixing hooks 91b are separated from each other by an isolation space 92 to provide a sufficient elastic deformation space for the fixing hooks 91 b. The arrangement path of the fixing hooks 91b is consistent with the shape of the fixing through holes 81c of the first fixing member 8, so that the fixing hooks 91b pass through the fixing through holes 81 c. In this embodiment, the fixing through hole 81c is circular, and the stopping portion 91a is provided with two hooks disposed opposite to each other. The size of the stopping part 91a is larger than that of the mounting hole 21 on the inner container 2b, so that the stopping part 91a is stopped at the outer side of the inner container 2 b.

When the pump shell is installed, the first fixing piece 8 is positioned on the inner side of the inner container 2b, and the fixing column is installed in an installation notch 61a of the connecting plate 61 on the pump shell 6; the stopping portion 91a of the second fixing member 9 is located outside the inner container 2b, and the fixing hook 91b sequentially penetrates through the mounting hole 21 on the inner container 2b and the fixing through hole 81c on the first fixing member 8 located inside the inner container 2b, and then is clamped with the fixing plate 81a on the first fixing member 8 far away from the inner container 2b, so that the second fixing member 9 and the first fixing member 8 are fixed, and the vacuum pump assembly and the inner container 2b are fixed.

In this embodiment, an elastic pad 18 is installed between the stopping portion 91a of the first fixing member 8 and the inner container 2b to effectively absorb vibration and reduce the transmission of vibration. The second fixing member 9 may be an elastic member, or an inner portion thereof may be made of a rigid material, and an outer portion thereof may be made of an elastic material, so as to maintain the connection rigidity and effectively reduce vibration and noise. It should be understood that when the fixing post or fixing plate 81a of the second fixing member 9 is provided with an elastic material at least externally, vibration and noise reduction can be achieved.

The vacuum pump assembly and the inner container are fixed through the clamping connection of the elastic fixing clamping hook 91b of the second fixing piece 9 and the first fixing piece 8 and the matching of the fixing column of the first fixing piece 8 and the mounting notch 61a on the vacuum pump assembly, and the mounting of the vacuum pump assembly is simplified due to the arrangement of the fixing structure; on the other hand, make vacuum pump subassembly and inner bag non-direct contact through above setting up, can effectively avoid the transmission of the produced noise of vacuum pump during operation, optimize the wholeness ability of refrigerator, improve user experience.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The refrigerator is characterized in that: it includes:

the low-temperature storage compartment is surrounded by the inner container;

leak protection gas unit, it includes:

2. The refrigerator according to claim 1, wherein: the outer end part is provided with a protruding sharp part, the sharp part comprises a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are intersected to form a protruding edge which surrounds the outer end part and is matched with the second baffle plate; the first inclined plane is connected with the inner wall surface, close to the first through hole, of the outer end portion of the ridge, and the second inclined plane is connected with the outer wall surface, far away from the first through hole, of the outer end portion of the ridge.

3. The refrigerator according to claim 1 or 2, characterized in that: and a vent hole is formed in the side wall of the inner end part.

4. The refrigerator according to claim 3, wherein: a first baffle plate is arranged at one end of the floating column, which is far away from the blocking cover, and a containing groove for containing the upright column is formed between the first baffle plate and the second baffle plate; the first baffle is used for being matched with the inner end part of the upright post.

5. The refrigerator of claim 4, wherein: under the floating column does not receive the exogenic action state, the groove width of holding tank is greater than the length of stand.

6. The refrigerator according to claim 1 or 2, characterized in that: the floating column is provided with a blind hole, and the open end of the blind hole is arranged at one end of the blind hole far away from the blocking cover.

7. The refrigerator according to claim 1 or 2, characterized in that: the baffle cover comprises a bottom wall and a side baffle wall surrounding the bottom wall; the bottom wall is provided with a connecting pipe communicated with the two sides of the bottom wall, and the connecting pipe is communicated with the vacuum pump; the side retaining wall is sleeved outside the outer end part of the upright post.

8. The refrigerator according to claim 7, wherein: and a sealing ring is arranged between the side retaining wall of the retaining cover and the low-pressure storage unit.

9. The refrigerator according to claim 7, wherein: the pressure storage unit is provided with a screw column which is arranged on the periphery of the outer end part;

10. The refrigerator according to claim 1, wherein: a convex ring is arranged around the outer end part of the upright post, and the baffle cover is sleeved outside the convex ring.