CN114061216A

CN114061216A - Refrigerator and vacuumizing control method thereof

Info

Publication number: CN114061216A
Application number: CN202010757175.2A
Authority: CN
Inventors: 杨春; 王吉祥; 韩宁; 赵兴; 鲍雨锋; 王海燕; 朱建高; 张善房; 刘铁伟; 张建; 职东宁
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-02-18
Anticipated expiration: 2040-07-31
Also published as: CN114061216B

Abstract

The invention provides a refrigerator which comprises a refrigerator body, a refrigerator door, a low-pressure storage unit, an air extraction joint, an air extraction device and a three-way joint, wherein the top of the refrigerator door is provided with an accommodating part; the air extracting device comprises a vacuum pump, an exhaust pipe and an air inlet pipe which are arranged in the accommodating part; the air exhaust joint is arranged on the box door in a turnover manner and is communicated with the air inlet pipe through a first pipeline; a pressure relief unit adjacent to the vacuum pump is arranged in the accommodating part; the three-way joint comprises a first branch pipe and a second branch pipe which are communicated with each other; one end of the first branch pipe is communicated with the air inlet pipe, the other end of the first branch pipe is communicated with the first pipeline, and the second branch pipe is communicated with the pressure relief unit; according to the invention, the pressure relief unit balances the internal and external air pressures of the first pipeline after the vacuumizing is finished, so that a user can conveniently turn the air suction joint to separate the air suction joint from the low-pressure storage unit, and the user experience is improved; on the other hand, the pressure relief unit and the vacuum pump are arranged in the containing part, the second branch pipe is made of rubber materials, the space of the containing part is effectively utilized, the structure is simple, and the assembly is compact.

Description

Refrigerator and vacuumizing control method thereof

Technical Field

The invention belongs to the technical field of household refrigerators, and particularly relates to a refrigerator and a vacuumizing control method thereof.

Background

At present, the improvement of the quality requirement of fresh food by consumers also puts forward a new requirement on the configuration of a refrigerator in order to meet the requirements of the consumers, so that the fresh food stored in the refrigerator can be expected to have a longer storage period, thereby ensuring the freshness of the food material and preventing the loss of nutrient components.

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:

a cabinet defining an insulated low temperature storage compartment;

the box door is rotatably arranged on the box body so as to open or close the low-temperature storage room; the top of the box door is provided with an accommodating part;

the low-pressure storage unit is arranged at one side of the refrigerator door close to the low-temperature storage room, and air can be pumped into the low-pressure storage unit to form air pressure lower than the external atmospheric pressure of the refrigerator so as to be beneficial to keeping food fresh;

the air extracting device comprises a vacuum pump arranged in the accommodating part, an exhaust pipe connected with the vacuum pump and an air inlet pipe;

the air suction joint is communicated with the air inlet pipe through a first pipeline; the air suction joint is arranged on the box door in a turnover manner so as to be connected with or separated from the low-pressure storage unit;

the pressure relief unit is arranged in the accommodating part and is positioned at one end of the vacuum pump close to the air inlet pipe;

the three-way joint comprises a first branch pipe and a second branch pipe which are communicated with each other; one end of the first branch pipe is communicated with the air inlet pipe, the other end of the first branch pipe is communicated with the first pipeline, and the second branch pipe is communicated with the pressure relief unit;

the air suction joint is connected with the low-pressure storage unit, the vacuum pump works, and air in the low-pressure storage unit sequentially passes through the air suction joint, the first pipeline, the air inlet pipe, the vacuum pump and the exhaust pipe; after the vacuumizing is finished, the pressure relief unit is opened, and gas enters the first pipeline.

Preferably, a partition plate corresponding to the first branch pipe is arranged on the bottom wall of the accommodating part, and the partition plate divides one end, close to the air inlet pipe, of the accommodating part into a first subsection and a second subsection;

the pressure relief unit is arranged in the first subsection; the joint of the second branch pipe and the first branch pipe is positioned on one side of the first branch pipe close to the second branch part.

Preferably, the pressure relief unit comprises a pressure relief piece, and the pressure relief piece comprises a connecting pipe communicated with a second branch pipe on the tee joint and a vent pipe communicated with the atmosphere; the connecting pipe and the vent pipe are blocked or communicated by changing the on-off state of the pressure relief piece.

Preferably, a damping sleeve is sleeved outside the pressure relief piece and is abutted to the first branch part.

Preferably, the three-way joint is formed by compression molding.

Preferably, the low-pressure storage unit is provided with an air suction port communicated with the inner cavity of the low-pressure storage unit; the air pumping device is characterized in that a one-way ventilation unit is arranged in the air pumping hole so as to open the air pumping hole when the air pumping device pumps air and seal the air pumping hole after air pumping is finished.

Preferably, the air extraction joint is provided with a butt joint port communicated with the first pipeline, and the butt joint port is used for butt joint with an air extraction port on the low-pressure storage unit so as to be communicated with an inner cavity of the low-pressure storage unit during vacuum extraction;

when the vacuum pumping is carried out, the vacuum pump works, and the gas in the low-pressure storage unit sequentially passes through the pumping hole, the butt joint hole, the first pipeline, the gas inlet pipe, the vacuum pump and the gas exhaust pipe.

Preferably, the low pressure storage unit is detachably coupled to the door.

Preferably, an air suction button is arranged on the box door and used for starting the vacuum pumping operation.

The vacuumizing control method of the refrigerator is characterized in that the refrigerator is provided with a control unit; the control method for vacuumizing the refrigerator comprises the following steps:

determining that the vacuumizing condition is met;

the control unit controls the air exhaust device to vacuumize;

and when the vacuumizing is finished, the control unit controls the pressure relief unit to be opened, and gas enters the air pumping pipeline.

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

Drawings

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

FIG. 2 is a schematic structural view illustrating a state in which an air suction connector is separated from a low pressure storage unit of the refrigerator according to the present invention;

FIG. 3 is a schematic structural view illustrating a state where an air suction connector is connected to a low pressure storage unit of the refrigerator according to the present invention;

FIG. 4 is a schematic view of a connection structure between a suction line and a suction joint of the refrigerator according to the present invention;

FIG. 5 is a schematic view of a top structure of a door of a refrigerator according to the present invention;

FIG. 6 is a schematic view of an assembly structure of a vacuum pump, an air extraction pipeline and a three-way joint of the refrigerator according to the present invention;

FIG. 7 is a schematic view of an assembly structure of the vacuum pump, the air extraction pipe and the tee coupling of the refrigerator at another view angle according to the present invention;

FIG. 8 is a schematic diagram showing the relative positions of the vacuum pump, the tee joint and the pressure relief unit of the refrigerator according to the present invention;

FIG. 9 is a schematic view of an assembly structure of a vacuum pump, a tee joint and a pressure relief unit of the refrigerator according to the present invention;

FIG. 10 is a schematic view of an assembly structure of a vacuum pump, a three-way joint, a pressure relief unit and a first pipeline of the refrigerator according to the present invention;

FIG. 11 is a schematic view of an assembly structure of the vacuum pump, the three-way joint, the pressure relief unit and the first pipeline of the refrigerator at another view angle according to the present invention;

FIG. 12 is a schematic structural view of a three-way joint of a refrigerator according to the present invention;

FIG. 13 is a schematic view of an assembly structure of a tee joint and a first pipeline of the refrigerator according to the present invention;

FIG. 14 is a schematic view of a portion of the structure of the suction fitting of the refrigerator of the present invention;

FIG. 15 is another schematic view of the suction fitting of the refrigerator of the present invention;

fig. 16 is a partial structural view of a low pressure storage unit of the refrigerator of the present invention;

fig. 17 is another structural schematic view of a low pressure storage unit of the refrigerator of the present invention;

FIG. 18 is a timing diagram illustrating a method for controlling vacuum pumping of a refrigerator according to the present invention.

In the above figures: a refrigerator 1; a box body 2; a low-pressure storage unit 3; an air extraction port 3 a; a vacuum pump 4; an elastic sleeve 5; an air extraction joint 6; the interface 6 a; a pressure relief unit 7; a pressure relief member 71; a damping sleeve 72; the connection pipe 71 a; a breather pipe 71 b; an air extraction key 8; a refrigerating chamber 9; a door 10; the accommodating portion 10 a; a first section 10 b; a second section 10 c; an intake pipe 11; an exhaust pipe 12; a first pipe 13; a one-way ventilation unit 15; a three-way joint 16; the first branch pipe 16 a; a second branch pipe 16 b; a partition plate 17.

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 the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is 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 to 17, a refrigerator 1 includes a cabinet 2 defining a plurality of insulated low-temperature storage compartments to store food and the like. Specifically, the low-temperature storage compartments are respectively a refrigerating compartment and a freezing compartment; wherein the refrigerating compartment is located at the upper portion and the freezing compartment is located at the bottom portion. Each low-temperature storage room is respectively provided with a respective box door; the refrigerating chamber 9 of the present invention is provided with a side-by-side door 10. The refrigerator 1 has an evaporative refrigeration system forming a closed loop. Since such refrigeration systems are well known in the art, they will not be described in detail herein.

As shown in fig. 2 to 4, the chamber door 10 is provided with a low-pressure storage unit 3, an air extractor, and an air extracting joint 6. Specifically, the low pressure storage unit 3 is detachably provided on the door 10 and may be maintained in a low pressure state. The air extractor is arranged at the top of the box door 10, and the air extractor and the low-pressure storage unit 3 are positioned on the same box door 10; the gas-extracting device is used for extracting gas from the low-pressure storage unit 3 so as to form a low-pressure state in the low-pressure storage unit 3. The air extraction joint 6 is arranged on the box door 10 in a turnover manner, and the air extraction joint 6 is positioned on one side of the box door 10 close to the low-pressure storage unit 3; the suction fitting 6 is connected to or disconnected from the low pressure storage unit 3 by turning the suction fitting 6.

When the low-pressure storage unit 3 is connected to the air extraction joint 6 and the air extraction device is started, the gas in the low-pressure storage unit 3 is extracted, and the low-pressure storage unit 3 is in a low-pressure state. According to a preferred embodiment of the present invention, the pressure inside the low pressure storage unit 3 is between a standard atmospheric pressure and a vacuum absolute at the end of the evacuation process. Since the pressure of the air in the low-pressure storage unit 3 is lower than the standard atmospheric pressure, those skilled in the art also refer to it as "vacuum storage" and refer to the state in which the pressure of the air is lower than the standard atmospheric pressure as "vacuum state".

Referring to fig. 4, as shown in fig. 5 to 13, the top of the box door 10 is provided with a receiving portion 10a for receiving the vacuum pump 4. The air extracting device comprises a vacuum pump 4 and an elastic sleeve 5; the elastic sleeve 5 is sleeved outside the vacuum pump 4 and abuts against the accommodating portion 10a at the top of the box door 10 to reduce vibration and noise. The vacuum pump 4 is provided with an exhaust pipe 12 and an air extraction pipeline; the pumping pipeline comprises an air inlet pipe 11 and a first pipeline 13; wherein, one end of the first pipeline 13 is communicated with the air inlet pipe 11, and the other end is communicated with the air suction connector 6, so as to be communicated with the low pressure storage unit 3 when the air suction connector 6 is connected with the low pressure storage unit 3. Specifically, referring to fig. 4, the first pipeline 13 extends from top to bottom along the box door 10 to the suction connector 6. The pumping pipeline is provided with a pressure relief unit 7 communicated with the pumping pipeline, so that external air enters the pumping pipeline of the pumping device after the pumping is finished, the internal and external air pressures of the pumping pipeline of the pumping device are balanced, the internal and external pressure difference of the pumping connector 6 is reduced, and a user can conveniently turn over the pumping connector 6 to separate the pumping connector from the low-pressure storage unit 3.

As shown in fig. 5-13, in the present embodiment, the pressure relief unit 7 is installed in the accommodating portion 10a and is disposed at a connection position of the air inlet pipe 11 and the first pipeline 13. The pressure relief unit 7, the air inlet pipe 11 and the first pipeline 13 are connected through a three-way joint 16. Specifically, the pressure relief unit 7 comprises a pressure relief piece 71, and a damping sleeve 72 is sleeved outside the pressure relief piece 71; the damping sleeve 72 abuts against the accommodating portion 10a to damp noise. The pressure relief member 71 includes a connection pipe 71a communicating with the suction line and a vent pipe 71b communicating with the outside atmosphere. By controlling the opening and closing state of the pressure relief member 71, the connection pipe 71a and the vent pipe 71b can be blocked or communicated, thereby changing the communication state between the air suction pipeline and the atmosphere to balance the air pressure inside and outside the air suction pipeline.

As shown in fig. 12, the three-way joint 16 includes a first branch pipe 16a, a second branch pipe 16b communicating with each other; wherein at least the second branch pipe 16b is made of rubber material, i.e. the second branch pipe 16b is a rubber pipe; specifically, in this embodiment, the second branch pipe 16b is made of a silicone material, and the three-way joint 16 is formed by compression molding. One end of the first branch pipe 16a communicates with the intake pipe 11, the other end communicates with the first pipeline 13, and the second branch pipe 16b communicates with the connection pipe 71a of the decompression unit 7. The pressure relief unit 7 is arranged in the accommodating part 10a and is positioned at one end of the vacuum pump 5 close to the water inlet pipe 11, and the pressure relief unit 7 is arranged adjacent to the air suction pipeline. In the present embodiment, a partition plate 17 is provided on the bottom wall of the accommodating portion 10a, and the partition plate 17 is located corresponding to the first branch pipe 16a to partition one end of the accommodating portion 10a close to the air inlet pipe 11 into a first sub-portion 10b and a second sub-portion 10 c; that is, the first branch 10b and the second branch 10c are on opposite sides of the first branch pipe 16 a.

The pressure relief unit 7 is mounted in the first subsection 10b, and the junction of the second branch 16b and the first branch 16a of the three-way connection 16 is located on the side of the first branch 16a close to the second subsection 10c, i.e. the second branch 16b in its natural state is located in the second subsection 10 c. When the pressure relief unit is installed, the second branch pipe 16b is bent to communicate with the connection pipe 71a of the pressure relief unit 7. The space of the accommodating part 10a can be fully utilized by the arrangement, and the structure is simple, the assembly is compact and the connection is convenient.

Specifically, the installation method of the air extraction device and the pressure relief unit comprises the following steps: first, as shown in fig. 13, one end of the first pipeline 13 near the housing portion 10a is connected to one end of the first branch pipe 16 a; next, as shown in fig. 5 to 7, the vacuum pump 4 is installed in the accommodating part 10a, and the other end of the first branch pipe 16a is connected to the intake pipe 11; further, as shown in fig. 8 to 11, the pressure relief unit 7 is installed, and the second branch pipe 16b is bent such that the second branch pipe 16b communicates with the connection pipe 71a on the pressure relief unit 7. The installation of the air extraction device and the pressure relief unit 7 is completed.

As shown in fig. 14 to 15, the suction joint 6 is provided with a butt joint port 6a, and the butt joint port 6a communicates with the first pipeline 13.

As shown in fig. 16 to 17, the low pressure storage unit 3 is provided with a suction port 3 a. When the air suction connector 6 is connected with the low-pressure storage unit 3 in an overturning way, the air suction port 3a is butted with a butting port 6a on the air suction connector 6 so as to communicate the inner cavity of the low-pressure storage unit 3 with the air suction pipeline during vacuumizing.

Specifically, the one-way ventilation unit 15 is arranged in the air extraction opening 3a, when the air extraction device extracts air, the one-way ventilation unit 15 opens the air extraction opening 3a, and after the air extraction is finished, the one-way ventilation unit 15 seals the air extraction opening 3 a. Specifically, the one-way ventilation unit 15 may include a rubber column installed in the suction port 3 a; when the pressure in the low-pressure storage unit 3 is higher than the pressure of the rubber column close to one side of the air extraction joint, the rubber column moves to one side close to the air extraction joint 6, and the air extraction opening 3a is opened; when the pressure in the low-pressure storage unit 3 is smaller than the pressure of the rubber column close to the air extraction joint 6, the rubber column moves to the side close to the inner cavity of the low-pressure storage unit 3 to seal the air extraction opening 3 a. The pumping opening 3a is opened or sealed under the action of the pressure difference.

In this embodiment, the air pumping port 3a is disposed at the top of the low pressure storage unit 3, the air pumping joint 6 is disposed above the low pressure storage unit 3, and when the air pumping joint 6 is butted with the low pressure storage unit 3, the butt joint port 6a of the air pumping joint 6 corresponds to the air pumping port 3 a.

The vacuum pump 4 works, negative pressure is generated on one side, close to the air extraction joint 6, of the one-way ventilation unit 15, the air extraction opening 3a is opened, the inner cavity of the low-pressure storage unit 3 is communicated with the first pipeline 13, and gas in the low-pressure storage unit 3 sequentially passes through the air extraction opening 3a, the butt joint opening 6a, the first pipeline 13, the air inlet pipe 11, the vacuum pump 4 and the exhaust pipe 12. In this embodiment, the exhaust duct 12 may be disposed to communicate with the external atmosphere of the refrigerator to exhaust the air drawn from the inside of the low pressure storage unit 3 to the outside of the refrigerator 1.

When the vacuum pump 4 stops working, the pressure of the one-way ventilation unit 15 close to the air extraction joint 6 is higher than that of the one-way ventilation unit close to the inner cavity of the low-pressure storage unit 3, the air extraction opening 3a of the low-pressure storage unit 3 is closed, and the low-pressure storage unit 3 is in a low-pressure sealing state. At this time, since the air suction joint 6 is still hermetically connected with the air suction port 3a, the pressure in the first pipeline 13 is lower than the external atmospheric pressure, and if the air suction joint 6 is directly and manually turned over to be separated from the low pressure storage unit 3, a user needs to apply a large force; according to the invention, the pressure relief unit 7 communicated with the first pipeline 13 is arranged, after the vacuumizing is finished, the pressure relief unit 7 is opened, and the gas enters the first pipeline 13, so that the pressure inside and outside the first pipeline 13 is balanced, and a user can conveniently turn the air suction connector 6 to separate the air suction connector from the low-pressure storage unit 3.

In this embodiment, as shown in fig. 3, an air-extracting button 8 is disposed on the box door 10 for starting the vacuum-pumping operation. Specifically, a vacuum-pumping time threshold may be set, and when the vacuum-pumping reaches a preset vacuum-pumping time threshold, the vacuum-pumping is terminated. Then, the pressure relief unit 7 is opened to allow gas to enter the suction line of the suction device, thereby balancing the pressure inside and outside the line to facilitate the user to turn the suction connector 6 to be separated from the low pressure storage unit 3.

It should be understood that the above-described vacuum opening and closing manner is not limited thereto; a pressure detection unit can also be arranged on the low-pressure storage unit 3 to monitor the pressure in the low-pressure storage unit 3 in real time; and the vacuum pumping operation is started by a pressure signal.

The refrigerator 1 is provided with a control unit for controlling the working conditions of the air extraction device and the pressure relief unit 7 so as to realize the automatic control of the vacuum pumping of the low-pressure storage unit 3. Namely, the control unit controls the air extractor to vacuumize the low-pressure storage unit 3 and controls the pressure relief unit 7 to balance the internal and external air pressures of the air extraction pipeline after the vacuumizing is finished.

In this embodiment, a display unit is disposed on a side of the door 10 (or other display terminal, such as a mobile phone) away from the storage compartment to display the vacuum condition in the low pressure storage unit 3. Specifically, the target vacuum degree of the low-pressure storage unit 3 is set to be-20 Kpa, the vacuumizing operation is started by the air exhaust button 8 or the pressure signal, the vacuumizing condition is displayed on the display unit in real time, and the display vacuum degree is stopped from 0Kpa to-10 Kpa and then to-20 Kpa.

In addition, a plurality of target vacuum degree gears are set; for example, two target vacuum levels-20 Kpa, -10pa are set. A user can preset a required target vacuum degree gear; for example, the device is preset to 10Kpa for storing fruits and vegetables, and is preset to 20Kpa for storing meat and dry goods; then, when the vacuumizing operation is performed, the control logic is the same as the above. The vacuum degree in the low-pressure storage unit is visualized to a user through the arrangement, and the user can perform specific target vacuum degree setting according to the type of the stored materials in the low-pressure storage unit, so that the user can perform differential vacuum pumping.

Specifically, the air extraction key 8 or the pressure detection unit can be used as a trigger unit for controlling the vacuum extraction of the refrigerator; the refrigerator can also be provided with a timing unit, namely, the timing unit or the pressure detection unit is used as a monitoring unit for monitoring the vacuumizing process during the vacuumizing control of the refrigerator. The monitoring unit monitors whether the condition of stopping vacuumizing is achieved, vacuumizing is stopped when the preset condition is achieved, and the monitoring unit feeds back a vacuumizing ending signal to the control unit. Specifically, when the monitoring unit is set as a timing unit, the vacuum pump 4 stops working when the working time of the vacuum pump 4 reaches a preset vacuumizing time threshold value, and the timing unit feeds back a vacuumizing ending signal to the control unit. The monitoring unit is a pressure detection unit, and when the pressure detection unit detects that the air pressure in the low-pressure storage unit 3 reaches a preset air pressure finishing threshold value, the vacuum pump 4 stops working, and the pressure detection unit feeds back a vacuum-pumping finishing signal to the control unit.

It should be noted that the pressure detecting unit 14 may be configured to always monitor the air pressure in the low-pressure storage unit 3, so as to use the pressure signal as a trigger condition for starting or ending the vacuum pumping; in addition, the pressure detection unit 14 may be configured to be able to detect the air pressure in the low pressure storage unit 3 only during the evacuation process, and as shown in fig. 11, the pressure detection unit 14 is connected to the air extraction line of the air extraction device, and after the evacuation process is completed, the pressure detection unit is disconnected from the low pressure storage unit 3, so that the effective detection of the air pressure in the low pressure storage unit 3 cannot be ensured. When the control logic is specifically designed, the control logic is limited according to actual setting.

Specifically, as shown in fig. 18, the method for controlling vacuum pumping of a refrigerator includes the following steps:

s1: determining that the vacuumizing condition is met;

specifically, the suction connector 6 interfaces with the low pressure storage unit 3 and the user triggers the vacuum operation through the suction button 8. The air suction connector 6 can be arranged to be butted with the low-pressure storage unit 3, and the pressure detection unit detects that the air pressure in the low-pressure storage unit 3 reaches a preset opening air pressure threshold value.

S2: the control unit controls the vacuum pump 4 to vacuumize, and the monitoring unit monitors the vacuumized state;

specifically, the monitoring unit monitors whether a condition of stopping vacuumizing is achieved, vacuumizing is stopped when a preset condition is achieved, and the monitoring unit feeds back a vacuumizing ending signal to the control unit.

S3: when the vacuumizing is finished, the control unit controls the pressure relief unit 7 to be opened, and gas enters the air pumping pipeline to balance the internal and external air pressure of the air pumping pipeline.

The control method for vacuumizing the refrigerator can perform pressure relief on the air exhaust pipeline of the air exhaust device at the first time when vacuumizing is finished, so that a user can conveniently turn the air exhaust connector 6 to be separated from the low-pressure storage unit 3.

In the invention, the pressure relief unit 7 and the vacuum pump 4 are both arranged in the accommodating part 10a at the top of the box door 10, the connecting air inlet pipe 11, the first pipeline 13 and the pressure relief unit 7 are communicated through the three-way joint 16, wherein the second branch pipe 16b of the three-way joint 16 connected with the pressure relief unit 7 is made of rubber material so as to be communicated with the pressure relief unit 7 through bending when being installed. The space of the accommodating part 10a can be fully utilized by the arrangement of the three-way joint, and the three-way joint is simple in structure, compact in assembly and convenient to connect.

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. Refrigerator, characterized in that it comprises:

a cabinet defining an insulated low temperature storage compartment;

2. The refrigerator according to claim 1, wherein: the bottom wall of the accommodating part is provided with a partition plate corresponding to the first branch pipe, and one end of the accommodating part, which is close to the air inlet pipe, is divided into a first subsection and a second subsection by the partition plate;

3. The refrigerator according to claim 2, wherein: the pressure relief unit comprises a pressure relief piece, and the pressure relief piece comprises a connecting pipe communicated with a second branch pipe on the tee joint and a vent pipe communicated with the atmosphere; the connecting pipe and the vent pipe are blocked or communicated by changing the on-off state of the pressure relief piece.

4. The refrigerator according to claim 3, wherein: and a damping sleeve is sleeved outside the pressure relief piece and is abutted to the first branch part.

5. The refrigerator according to any one of claims 1 to 4, wherein: the three-way joint is formed by compression molding.

6. The refrigerator according to any one of claims 1 to 4, wherein: the low-pressure storage unit is provided with an air suction port communicated with the inner cavity of the low-pressure storage unit; the air pumping device is characterized in that a one-way ventilation unit is arranged in the air pumping hole so as to open the air pumping hole when the air pumping device pumps air and seal the air pumping hole after air pumping is finished.

7. The refrigerator according to claim 6, wherein: the air extraction joint is provided with a butt joint port communicated with the first pipeline, and the butt joint port is used for butt joint with an air extraction port on the low-pressure storage unit so as to be communicated with an inner cavity of the low-pressure storage unit during vacuum extraction;

8. The refrigerator according to any one of claims 1 to 4, wherein: the low-pressure storage unit is detachably connected to the box door.

9. The refrigerator according to any one of claims 1 to 4, wherein: and an air exhaust button is arranged on the box door and is used for starting the vacuumizing operation.

10. A vacuum pumping control method of a refrigerator according to claim 1, characterized in that: the refrigerator is provided with a control unit; the control method for vacuumizing the refrigerator comprises the following steps:

determining that the vacuumizing condition is met;

the control unit controls the air exhaust device to vacuumize;