CN114165978A

CN114165978A - Control method of refrigerator

Info

Publication number: CN114165978A
Application number: CN202010954507.6A
Authority: CN
Inventors: 刘畅; 刘桂信; 崔增燕; 吴光瑞; 陈建龙
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2022-03-11
Anticipated expiration: 2040-09-11
Also published as: CN114165978B

Abstract

The invention provides a control method of a refrigerator. The method comprises the following steps: judging whether the two fresh-keeping spaces need to be subjected to gas regulation or not; when one fresh-keeping space needs to be subjected to gas regulation, the flow path control device is controlled to enable the gas-regulating membrane component corresponding to the fresh-keeping space to be communicated with the two air extraction devices, so that more oxygen in the fresh-keeping space enters the two air extraction devices through the gas-regulating membrane component relative to nitrogen in the fresh-keeping space; when the two fresh-keeping spaces need to be subjected to gas regulation, the flow path control device is controlled to enable the two gas regulating membrane assemblies to be respectively communicated with the two air exhaust devices, so that more oxygen in each fresh-keeping space enters the corresponding air exhaust device through the corresponding gas regulating membrane assembly relative to nitrogen in the fresh-keeping space. Utilize two air exhaust device to take out oxygen, can show improvement oxygen speed of taking out, the maximize improves oxygen reduction rate, and intelligent degree is high.

Description

Control method of refrigerator

Technical Field

The invention relates to the technical field of cold storage and frozen storage, in particular to a control method of a refrigerator.

Background

The refrigerator is a refrigerating device for keeping constant low temperature, and is a civil product for keeping food or other articles in a constant low-temperature cold state. With the improvement of living standard of people, a new height is provided for the preservation of food materials, and the preservation of food is more urgent. Most refrigerators in the market at present only have basic food material cold storage and freezing storage functions, food material preservation is not distinguished in detail, and the preservation function cannot meet the requirements of customers. Some refrigerators have independent fresh-keeping chambers, but the temperature range is single, and only one type of food can be placed in the refrigerator. Some complaints that the fresh-keeping requirement of the food materials for the customers cannot be met are frequently heard.

Disclosure of Invention

The invention aims to overcome at least one defect of the existing refrigerator for fresh keeping, and provides a novel refrigerator, so that the refrigerator is provided with two air-conditioning chambers, each air-conditioning chamber is provided with a respective air-conditioning film unit, and each air-conditioning chamber is provided with a temperature value range, thereby realizing the fresh keeping requirements of different food materials. However, the inventor finds that after the low-temperature MSA and MSA functions are carried out simultaneously, two pumps simultaneously pump oxygen to one oxygen control interval, the practical efficiency is limited by the controlled oxygen film, the total oxygen reduction rate is slow, and the oxygen concentration is uneven because of different volumes of the two oxygen control intervals. Based on the above, the invention also provides a control method applicable to the novel refrigerator, and the control method of the refrigerator can be also applicable to other refrigerators.

The invention provides a control method of a refrigerator, wherein the refrigerator comprises a refrigerator body, a door body, two controlled atmosphere preservation devices, a flow path control device and two air exhaust devices, wherein the two controlled atmosphere preservation devices are arranged in the refrigerator body, a preservation space is limited in each controlled atmosphere preservation device, each controlled atmosphere preservation device comprises a controlled atmosphere membrane assembly, and the two controlled atmosphere membrane assemblies are communicated with the two air exhaust devices through the flow path control device in a controlled manner; the control method of the refrigerator comprises the following steps:

judging whether the two fresh-keeping spaces need to be subjected to gas regulation or not;

when one fresh-keeping space needs to be subjected to gas regulation, the flow path control device is controlled to enable the gas-regulating membrane component corresponding to the fresh-keeping space to be communicated with the two air extraction devices, so that more oxygen in the fresh-keeping space enters the two air extraction devices through the gas-regulating membrane component relative to nitrogen in the fresh-keeping space;

when the two fresh-keeping spaces need to be subjected to gas regulation, the flow path control device is controlled to enable the two gas regulating membrane assemblies to be respectively communicated with the two air exhaust devices, so that more oxygen in each fresh-keeping space enters the corresponding air exhaust device through the corresponding gas regulating membrane assembly relative to nitrogen in the fresh-keeping space.

Optionally, the control method of the refrigerator further includes: and in the process of gas regulation in both the two fresh-keeping spaces, when one of the fresh-keeping spaces completes the gas regulation, the flow path control device is controlled to enable the gas-regulating membrane component corresponding to the other fresh-keeping space to be communicated with both the two air exhaust devices.

Optionally, the control method of the refrigerator further includes: and in the process of gas regulation in one fresh-keeping space, when the other fresh-keeping space also needs to be subjected to gas regulation, the flow path control device is controlled to enable the two gas-regulating membrane assemblies to be respectively communicated with the two air extraction devices.

Optionally, whether the corresponding fresh-keeping space needs to be gas-conditioned and whether the gas conditioning is completed is determined by detecting the oxygen concentration in each fresh-keeping space.

Optionally, two storage compartments are further arranged in the refrigerator body, the refrigerator further comprises two door bodies, each air-conditioning and refreshing device is installed in one storage compartment, and each door body is configured to open or close one storage compartment; wherein the control method of the refrigerator further comprises:

detecting whether the door body is opened or not;

when the door body is opened, judging whether the modified atmosphere membrane component of the modified atmosphere preservation device corresponding to the door body works or not; if the controlled atmosphere module of the controlled atmosphere preservation device is in a working state, the controlled atmosphere module of the controlled atmosphere preservation device is suspended to work; wherein, the air-conditioning film assembly of the air-conditioning preservation device is in a working state when the two air exhaust devices work;

when the door body is closed, detecting whether the corresponding controlled atmosphere membrane component of the controlled atmosphere preservation device is in a work pause state; if the controlled atmosphere module of the controlled atmosphere preservation device is in a pause working state, the controlled atmosphere module of the controlled atmosphere preservation device continues to work; if the corresponding controlled atmosphere component of the controlled atmosphere preservation device is in a shutdown state, detecting whether the controlled atmosphere preservation device is opened;

if the controlled atmosphere preservation device is opened, judging whether the corresponding preservation space needs to be subjected to gas regulation or not after the door body is closed for a first preset time; otherwise, after the door body is closed for a second preset time, judging whether the corresponding fresh-keeping space needs to be subjected to gas regulation or not; the second preset time is less than the first preset time.

Optionally, the determining whether the two fresh food spaces require gas conditioning is performed when a compressor of the refrigerator is in a shutdown state.

Optionally, the preset storage temperatures in the two fresh-keeping spaces are different.

Optionally, the flow path control device is an electric four-way valve, an oxygen concentration sensor is arranged in each fresh-keeping space, each air extractor comprises a vacuum pump, a compressor bin is arranged in the box body, and the two air extractors are arranged in the compressor bin.

Optionally, the refrigerator further comprises two moisture permeable devices, two air supply devices and two air guide devices, wherein a communication port is formed in the rear part of the upper surface of the modified atmosphere preservation device, each moisture permeable device is installed at the communication port of one modified atmosphere preservation device, and the moisture permeable device is provided with a moisture permeable film, so that moisture in the preservation space can be unidirectionally permeated to the outside of the preservation space through the moisture permeable film; each air supply device is arranged above one air-conditioning preservation device, and an air inlet of each air supply device faces to part or all of the corresponding moisture permeable film; each air guide device is arranged on the upper side of one air-conditioning preservation device, the rear end of each air guide device is communicated with the cooling chamber of the refrigerator, and the air guide devices are configured to supply air to at least the front part and/or the front part of the air-conditioning preservation device.

Optionally, the refrigerator further comprises two temperature-controlled heat conducting devices; the air pumping device comprises a pump head with an outlet, an exhaust pipe and a motor, the temperature-controlled heat conduction device is configured to transfer heat generated by the motor to the pump head, and the heat transfer is cut off after the temperature of the pump head reaches a preset temperature;

the motor comprises a motor shell, and the motor shell and the pump head are both thermally connected with the temperature-controlled heat conduction device; the exhaust pipe is wound on the motor shell, and an inlet of the exhaust pipe is communicated with an outlet of the pump on the pump head; the exhaust pipe is made of a heat conducting material, and the temperature control type heat conducting device is in thermal connection with the motor shell through the exhaust pipe.

In the control method of the refrigerator, because the refrigerator is provided with two controlled atmosphere preservation devices, namely two controlled atmosphere chambers, each controlled atmosphere chamber is provided with the respective controlled atmosphere membrane component, and the two air extraction devices are used for extracting oxygen, the oxygen extraction speed can be obviously improved, and the oxygen reduction rate can be maximally improved. Furthermore, each air-conditioning chamber has a temperature value range, so that the preservation requirements of different food materials are met. Furthermore, the oxygen concentration sensor is used for detecting the oxygen control interval in real time, the electric four-way valve is used for controlling the passage, the program optimization control is performed, the oxygen reduction speed and the lowest oxygen reduction value of oxygen control preservation can be effectively improved, and the intelligent degree is high.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic front view of a refrigerator according to one embodiment of the present invention;

FIG. 2 is a schematic side view of a refrigerator according to one embodiment of the present invention;

fig. 3 is a schematic operation principle diagram of a refrigerator according to one embodiment of the present invention;

fig. 4 is a schematic structural view of a refreshing apparatus in a refrigerator according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of the modified atmosphere preservation apparatus shown in FIG. 4;

FIG. 6 is a schematic exploded view of the modified atmosphere preservation apparatus shown in FIG. 4;

FIG. 7 is a schematic sealing diagram of the modified atmosphere preservation apparatus shown in FIG. 4;

FIG. 8 is a schematic partial block diagram of an air extractor in the refrigerator of FIG. 1;

fig. 9 is a schematic flowchart of a control method of a refrigerator according to one embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic front view of a refrigerator according to one embodiment of the present invention. As shown in fig. 1 and referring to fig. 2 to 8, an embodiment of the present invention provides a refrigerator. The refrigerator comprises a refrigerator body 20, two air-conditioning and fresh-keeping devices 30 and a refrigerating system.

A storage chamber is arranged in the box body 20, and a door body is arranged at an opening of the storage chamber to open and close the storage chamber. For example, a refrigerating compartment, a freezing compartment, and a temperature-changing compartment are provided in the cabinet 20. The storage temperature of the refrigerated compartment is generally between 2 ℃ and 10 ℃, preferably between 3 ℃ and 8 ℃. The temperature in the freezer compartment is typically in the range of-14 ℃ to-22 ℃. The temperature-changing chamber can be adjusted as required to store suitable food, and optionally, the temperature of the temperature-changing chamber can be changed from-24 ℃ to 10 ℃. Preferably, the temperature of the variable temperature compartment varies in the range of-8 ℃ to 0 ℃. The refrigerating system is configured to provide cold energy to the storage compartment and can be composed of a compressor, a condenser, a throttling device, an evaporator and the like.

Each modified atmosphere preservation apparatus 30 may include a storage vessel and a modified atmosphere module 42. A fresh-keeping space is limited in each storage container. Two storing containers set up in the storing room, and the storing temperature of predetermineeing in one storing container is different with the storing temperature of predetermineeing in another storing container. For example, the storage compartments are multiple, the two controlled atmosphere preservation devices 30 are respectively arranged in the two storage compartments, and the preset temperature in each storage compartment can be different, so that the preset storage temperature in the controlled atmosphere preservation devices 30 is different. For another example, there are at least two storage compartments, and two modified atmosphere preservation devices 30 including a first storage compartment and a second storage compartment are respectively disposed in the first storage compartment and the second storage compartment. Further, the first storage chamber can be a refrigerating chamber, and the second storage chamber can be a temperature-changing chamber or a freezing chamber. For example, two storage containers may be disposed in one storage compartment, but the preset storage temperatures in the two storage containers are different.

Each gas-modified membrane module 42 is mounted to a corresponding storage container and the space around the gas-modified membrane module 42 is in communication with a corresponding fresh-keeping space, each gas-modified membrane module 42 having at least one gas-modified membrane and one oxygen-enriched gas collection chamber and being configured such that more oxygen in the gas stream in the space around the gas-modified membrane module 42 permeates the gas-modified membrane into the oxygen-enriched gas collection chamber than nitrogen therein, so that more oxygen in the fresh-keeping space flows out of the fresh-keeping space than nitrogen.

In the embodiment of the present invention, two modified atmosphere preservation devices 30 are provided, that is, two modified atmosphere chambers are provided, each modified atmosphere chamber has its own modified atmosphere module 42, and each modified atmosphere chamber has its own temperature value range, so that the preservation requirements of different food materials are met. In some alternative embodiments of the invention, the preset warm storage temperatures in both storage containers are the same.

Preferably, in this embodiment, the refrigerator further comprises two air extracting devices 70 and a flow path control device 80, wherein the air extracting device 70 has an air extracting opening, and the flow path control device 80 has 4 communication openings respectively communicating the two oxygen-enriched gas collecting cavities and the two air extracting openings. That is, the two oxygen-enriched gas collecting cavities are controlled to be communicated through the outlet pipeline 34 and the flow path control device 80, so that the two air-extracting devices can be simultaneously communicated with any one of the two oxygen-enriched gas collecting cavities, or the two air-extracting devices can be simultaneously communicated with the two oxygen-enriched gas collecting cavities respectively. Further alternatively, the flow path control device 80 is an electric four-way valve. Two air extracting devices are used for extracting oxygen, so that the oxygen extracting speed can be obviously improved, and the oxygen reduction rate is improved to the maximum extent.

Further, a compressor bin for placing a compressor is further arranged inside the box body, and the air extraction device 70 is arranged in the compressor bin. The flow path control device 80 may be mounted within the compressor compartment adjacent to the air extraction devices 70, and more preferably, the flow path control device 80 is integrated into one of the air extraction devices 70.

In some embodiments of the invention, the plurality of modified atmosphere devices 30 includes a first modified atmosphere device 31 disposed in the first storage compartment and a second modified atmosphere device 32 disposed in the second storage compartment. The first storage compartment is positioned above the second storage compartment, and the first modified atmosphere preservation device 31 is positioned above the second modified atmosphere preservation device 32. The temperature of each fresh-keeping chamber is different, for example, the temperature of the cold storage chamber is set to be 5-8 ℃, so that the fresh-keeping requirements of fruits, vegetables and the like are met; the temperature in the low-temperature chamber, such as the variable-temperature chamber, is set to be 0-minus 3 ℃, which is favorable for the fresh-keeping requirement of food materials such as meat, seafood and the like.

In some embodiments of the present invention, the refrigerator may further include two moisture permeation devices 41 and two air supply devices. The atmosphere-controlled fresh-keeping device 30 is internally limited with a fresh-keeping space, and the rear part of the upper surface of the atmosphere-controlled fresh-keeping device 30 is provided with a communication port. The moisture permeable device 41 can be installed at the communication port, and the moisture permeable device 41 has a moisture permeable film so as to make moisture flow in a single direction, and when the humidity in the fresh keeping space is greater than the humidity outside the fresh keeping space, the moisture in the fresh keeping space flows out of the fresh keeping space through the moisture permeable film. That is to say, the moisture permeable film makes the moisture in the fresh-keeping space unidirectionally permeate to the outside of the fresh-keeping space through the moisture permeable film, so that the fresh-keeping space has the humidity meeting the requirement.

The air supply device can be a vortex fan 50 or a centrifugal fan, the air supply device is arranged in the storage room and is positioned above a corresponding air conditioning and fresh keeping device 30, and the air inlet of the vortex fan 50 or the centrifugal fan faces to part or all of the corresponding moisture permeable film. When the air supply device is started, the air flow outside the air-conditioned freshness retaining device 30 can be accelerated, particularly the air flow outside the moisture permeable device 41 is accelerated, the air circulation near the moisture permeable device 41 is accelerated, the humidity value outside the air-conditioned freshness retaining device 30 is reduced, the phenomenon that the moisture permeable film efficiency is reduced or completely loses efficacy to enable the water vapor in the freshness retaining space to be incapable of being discharged is prevented, the moisture permeable efficiency is improved, frosting is further prevented, and the intelligent degree are high. Because of having moisture permeable device and air supply arrangement, the air intake of vortex fan or centrifugal fan can be towards the moisture permeable film, can accelerate the fresh-keeping device of air conditioning outside air flow, reduce the fresh-keeping device outside humidity value of air conditioning, especially the humidity value in the moisture permeable film outside, form great humidity difference, prevent that moisture permeable film efficiency from reducing or totally losing efficacy and make the inside steam in fresh-keeping space unable the discharge, improve moisture permeable efficiency, and then reduce the steam that the edible material produced and gather inside and form condensation or frost, also can make the indoor temperature of storing room distribute evenly as early as possible simultaneously, it is intelligent, the intelligent degree is high.

In some embodiments of the present invention, the refrigerator further includes two air guiding devices 60. An air supply outlet 24 can be arranged on the rear wall of each storage chamber, and an air return outlet 25 is arranged at the lower part of the rear wall of each storage chamber and used for refrigerating airflow circulation in the storage chamber. The return air opening 25 is located below the supply air opening 24. The air guide device 60 is arranged on the upper side of the air-conditioning preservation device 30, the rear end of the air guide device 60 is connected to the air supply outlet 24, and the air guide device 60 is configured to supply air to at least the front part and/or the front part of the air-conditioning preservation device 30. The air guide device 60 guides the air flow to the front part, so that the rear wall of the cold air direct-blowing controlled atmosphere fresh-keeping device 30 can be prevented, the frosting formed on the inner wall surface due to too low local temperature of the rear wall surface is prevented, the user experience is influenced, and the condition that the frosting is caused by the fact that the air supply is not directly blown to the rear wall surface of the drawer can be guaranteed. Further, the air guiding device 60 is spaced from the upper surface of the air-conditioning and freshness-retaining device 30, so that the air flow can flow around the air-conditioning and freshness-retaining device 30 in the storage compartment.

In some embodiments of the invention, the modified atmosphere module 42 is preferably disposed on the front side of the moisture permeable device 41. The lower surface of the air guide device 60 is provided with a yielding groove 61 extending in the front-rear direction, and the vortex fan 50 or the centrifugal fan is mounted at the rear end of the yielding groove 61. The structure is compact, the volume is small, and the air flow of the air supply device is convenient to blow. The outlet of the vortex fan 50 or the centrifugal fan may face forward. Further, the upper limiting surface of the relief groove 61 is disposed obliquely, the front end of the upper limiting surface is connected to the lower surface of the air guiding device 60, and the rear end of the upper limiting surface is higher than the front end of the upper limiting surface. An air guide duct communicating with the air supply opening 24 is provided in the air guide device 60, and a plurality of outlets are provided on the lower surface of the air guide device 60 and/or a plurality of outlets are provided on the front surface of the air guide device 60. For example, the air guide device 60 has a bottom plate defining an air guide duct and a front grill provided at a front end of the bottom plate. The bottom plate is provided with a yielding groove 61, an outlet is formed in the bottom plate, the front grating is vertically arranged, and the grating holes are outlets. The special arrangement form of the flow fan or the centrifugal fan and the abdicating groove can lead the storage chamber to have compact structure, reasonable layout, convenient airflow flowing and low noise, and brings people comfortable feeling.

In some embodiments of the present invention, the storage container of the modified atmosphere preservation apparatus 30 includes a drawer 31 and an upper cover 32, the drawer 31 being slidably mounted in the storage compartment by a slide rail assembly 39, the upper cover 32 being configured to seal an upper opening of the drawer 31. For the convenience of taking and closing the drawer 31, the modified atmosphere preservation device 30 further comprises a lifting device, the upper cover 32 is arranged on the upper side of the drawer 31 in a vertically movable manner, and the drawer 31 is configured to drive the upper cover 32 to descend through the lifting device when moving backwards so as to close the drawer 31. The moisture permeation device 41 and the air conditioning membrane module 42 are mounted on the upper cover 32.

In some embodiments of the present invention, the refrigerator may further include a humidity detection device configured to detect a humidity inside the fresh food space and/or a humidity outside the fresh food space and inside the storage compartment. The vortex fan 50 or the centrifugal fan is configured to be activated according to the humidity value detected by the humidity detecting means. For example, the humidity detection means includes a first humidity detection means and a second humidity detection means. First humidity detection device sets up in fresh-keeping space, detects the humidity in the fresh-keeping space and obtains first humidity value. The second humidity detection device is arranged outside the fresh-keeping space and in the storage room, and the humidity outside the fresh-keeping space and in the storage room is detected to obtain a second humidity value. The vortex fan 50 or the centrifugal fan may be configured to turn on when a difference between the first humidity value and the second humidity value is less than or equal to a first preset value, and turn off until a difference between the first humidity value and the second humidity value is less than a second preset value. The second preset value is smaller than the first preset value.

When the humidity sensor is used specifically, whether the difference value between the first humidity value and the second humidity value is larger than a first preset value or not is judged. If not, the vortex fan 50 or the centrifugal fan is started, and if so, the vortex fan 50 or the centrifugal fan is not started. And further, continuously judging whether the difference value between the first humidity value and the second humidity value is smaller than a second preset value, wherein the second preset value is smaller than the first preset value. If so, the vortex fan 50 or the centrifugal fan is turned off. Otherwise, the vortex fan 50 or the centrifugal fan is kept in operation. The opening of the vortex fan 50 or the centrifugal fan is controlled according to the difference value between the first humidity value and the second humidity value, when the moisture permeation device 41 conducts moisture unidirectional permeation work, the humidity in the fresh-keeping space is gradually reduced, the external humidity is gradually increased, the difference value between the two is smaller and smaller, and when the difference value is smaller than or equal to a first preset value, the vortex fan 50 or the centrifugal fan is opened, and the moisture permeation efficiency is improved. Further, the humidity in the fresh-keeping space is gradually reduced again, the external humidity is reduced under the action of the vortex fan 50 or the centrifugal fan, then the reduced humidity is unchanged on the basis, the reduced humidity or the increased speed is reduced, and finally the difference between the inside and the outside of the fresh-keeping space is smaller and smaller, when the difference between the humidity in the fresh-keeping space and the humidity outside is smaller, the humidity in the fresh-keeping space can be considered to be reduced, the requirement is met, the difference between the inside and the outside is not enough to enable the moisture permeable device 41 to work, the vortex fan 50 or the centrifugal fan is stopped, and energy is saved.

It should be noted that, for some reason, for example, when the humidity in the storage compartment is suddenly increased, the vortex fan 50 or the centrifugal fan may be in the off state, if the difference between the first humidity value and the second humidity value is smaller than the first preset value, or even smaller than the second preset value, the vortex fan 50 or the centrifugal fan is started first, and after the vortex fan 50 or the centrifugal fan is started, the humidity value outside the fresh-keeping space is obviously reduced, so as to ensure the moisture permeation efficiency of the moisture permeation device 41. Optionally, in order to further improve the control accuracy and prevent the misoperation caused by the condition that the humidity inside and outside the fresh-keeping space is relatively high, when judging whether the difference value between the first humidity value and the second humidity value is smaller than the second preset value, judging whether the first humidity value is larger than the preset humidity value; and when the difference value between the first humidity value and the second humidity value is smaller than a second preset value, and the first humidity value is smaller than or equal to the preset humidity value, the vortex fan 50 or the centrifugal fan is closed.

In some embodiments of the invention, the storage container of the modified atmosphere preservation apparatus 30 further comprises a barrel 38 having a forward opening, the drawer 31 is movably mounted in the barrel 38 in a forward and backward direction, and the barrel 38 is mounted in the storage compartment. The upper wall of the cylinder 38 has the floor and the front grill of the air guide device 60, i.e., the floor and the front grill may be integrally formed and serve as the upper wall of the cylinder. Further, the box 20 further includes an upper outer cover plate 35 and a lower outer cover plate 36, the upper outer cover plate 35 and the lower outer cover plate 36 define the storage compartment, the upper outer cover plate 35 covers the upper side, the left side, the right side, and the rear side of the cylinder 38, and defines an air guide duct of the air guide device 60 with the upper wall of the cylinder 38. The air guide device 60 may be said to include the upper outer cover 35 and the upper wall of the cylinder 38. The lower outer cover plate 36 is provided to the remaining portions of the lower, left and right sides and rear side of the cylinder 38.

In some embodiments of the present invention, the lifting device comprises a lifting bracket 71, a connecting frame 72, a spring 73, a roller 74 and a pressing table 75.

The elevating bracket 71 is mounted on the cylinder 38, the connecting frame 72 is mounted on the elevating bracket 71 to be movable up and down, the upper cover 32 is mounted on the connecting frame 72, the spring 73 is used for urging the connecting frame 72 to move up, and the roller 74 is rotatably mounted on the lower end of the connecting frame 72 along the axis extending in the left-right direction. The pressing platform 75 is disposed on a side wall of the drawer, and is used for gradually moving the roller 74 downwards along the inclined side surface of the pressing platform 75 during the inward movement of the drawer 31, so as to drive the upper cover 32 to move downwards for sealing. After the drawer 31 is completely pushed into the cylinder 38, the roller 74 is located at a lower side of the lower horizontal surface of the pressing table 75 to keep the upper cover 32 in a state of closing the drawer 31, or to keep the upper cover 32 in a state of closing the cylinder 38, thereby keeping the drawer 31 closed.

In some embodiments of the present invention, the refrigerator further comprises an exhaust tube 93, and the air-extracting device 70 further comprises a vacuum pump having a pump head 91 with a pump outlet and a motor comprising a motor housing 92. An exhaust tube 93 is wound around the motor housing 92, and an inlet of the exhaust tube 93 communicates with an outlet of the pump on the pump head 91. Specifically the inlet of the exhaust pipe 93 communicates with the outlet of the pump through a flexible pipe 94. The flexible tube 94 may be a plastic tube. Specifically, air exhaust device 70 is the vacuum pump, and the vacuum pump generates heat and concentrates on the motor part, also is the key position of cooling, connects exhaust pipe 93 at the pump of vacuum pump for the export plastic pipe, and the cold air passes through exhaust pipe 93 and realizes the motor temperature reduction through the temperature conduction, and the high-speed air passes through exhaust pipe 93 and forces the convection current to realize the motor temperature reduction, falls the noise through the total length realization of extension exhaust.

Further, the refrigerator further includes a bimetal heat conduction device 95, the motor housing 92 and the pump head 91 are both thermally connected to the bimetal heat conduction device 95, and the bimetal heat conduction device 95 is configured to transfer heat generated by the motor to the pump head 91 and disconnect the heat transfer after the temperature of the pump head 91 reaches a preset temperature. By arranging the bimetallic strip heat conduction device 95, when the temperature of the pump head 91 is low, the pump head 91 is connected with the motor shell 92, and the pump head 91 is prevented from frosting and freezing by utilizing the high-temperature heating of the pump head 91; when the pump head 91 is hot, the heat transfer is disconnected, preventing that high temperature from continuing to heat the pump head 91 on the motor. After the temperature is reduced, the bimetal thermal device 95 is reset for heat transfer. The bimetallic strip heat conducting device 95 is utilized, so that the structure is simple, the cost is low, and the service life is long. Further, the motor shell 92 is directly used for cooling, the structure of the motor and the air exhaust device 70 is not changed, the practicability is high, and the cost is low. In some embodiments of the present invention, the exhaust tube 93 is made of a heat conductive material, and the bimetal heat conducting device 95 is thermally connected to the motor housing 92 through the exhaust tube 93. Specifically, the exhaust pipe 93 includes an inlet pipe section, a winding pipe section, and an outlet pipe section, the inlet pipe section and the outlet pipe section being connected to both ends of the winding pipe section, the winding pipe section being wound around the motor case 92. The bimetallic strip thermal conductor 95 is thermally connected to the end of the outlet pipe section which is connected to the wound pipe section. For example, the exhaust pipe 93 is provided with a metal plate 96, and the metal plate 96 is thermally connected to the bimetal thermal conduction device 95. The heat is transferred through the exhaust pipe 93, so that the temperature of the pump head 91 is not increased too fast or too high, the temperature of the pump head 91 is not changed frequently, the bimetallic strip heat conducting device 95 is not operated frequently, and the service life and the performance of the pump head 91 are not affected.

By arranging the temperature control type heat conduction device, when the temperature of the pump head is low, the pump head is prevented from frosting and freezing by utilizing high-temperature heating generated by the motor; when the pump head temperature is high, the heat transfer is disconnected, and the high temperature on the motor is prevented from continuously heating the pump head. The pump head can be prevented or frosted, the performance of the vacuum pump is guaranteed, and the reliability of the vacuum pump is prolonged. The pump mouth is connected the blast pipe, and the motor temperature reduction is realized through temperature conduction to the cold air through the blast pipe, and the motor temperature reduction is realized through blast pipe forced convection to the high-speed air, falls the noise through the realization of extension exhaust total length. The service life of the air exhaust device is prevented from being influenced by the overhigh temperature of the motor, the noise generated by the air exhaust device can be reduced, and the user experience effect is improved. The temperature control type heat conduction device can also prevent the heat dissipation effect of the motor from being influenced by continuously heating the pump head.

The present invention also provides a control method of a refrigerator, fig. 9 is a schematic flowchart of the control method of the refrigerator according to an embodiment of the present invention, and as shown in fig. 9, the control method of the refrigerator includes:

and judging whether the two fresh-keeping spaces need to be subjected to gas regulation or not. That is, it is judged whether the two fresh-keeping spaces need oxygen control or not to obtain an excellent fresh-keeping effect. The two fresh-keeping spaces can be judged simultaneously or can be judged according to different requirements.

When a fresh-keeping space needs to be gas-conditioned, the flow path control device 80 is controlled to enable the gas-conditioning membrane module 42 corresponding to the fresh-keeping space to be communicated with both of the two gas extraction devices 70, so that more oxygen in the fresh-keeping space enters the two gas extraction devices 70 through the gas-conditioning membrane module 42 than nitrogen in the fresh-keeping space. Two air extracting devices are used for extracting oxygen, so that the oxygen extracting speed can be obviously improved, and the oxygen reduction rate is improved to the maximum extent.

When the two fresh-keeping spaces need to be gas-conditioned, the flow path control device 80 is controlled to make the two gas-conditioning membrane assemblies respectively communicate with the two gas extraction devices 70, so that more oxygen in each fresh-keeping space enters the corresponding gas extraction device 70 through the corresponding gas-conditioning membrane assembly 42 relative to the nitrogen therein. Ensuring the oxygen reduction requirement.

In some embodiments of the present invention, during the process of air conditioning in both of the two fresh keeping spaces, when one of the fresh keeping spaces completes air conditioning, the flow path control device 80 is controlled to connect the air-conditioning membrane module 42 corresponding to the other fresh keeping space with both of the air extractors 70. In the process of gas conditioning in one fresh-keeping space, when the other fresh-keeping space also needs to be gas conditioned, the control flow path control device 80 makes the two gas-conditioning membrane modules 42 respectively communicate with the two gas-extracting devices 70. That is, whenever both of the two fresh-keeping spaces require oxygen reduction, the two air-conditioning membrane modules 42 are respectively communicated with the two air extraction devices 70; when one of the fresh-keeping spaces needs to be deoxygenated, the corresponding controlled atmosphere module 42 is communicated with both of the two air extraction devices 70. The oxygen reduction speed and the oxygen reduction effect are ensured, and the storage of articles is convenient.

In some embodiments of the present invention, the oxygen concentration in each fresh-keeping space is detected to determine whether the corresponding fresh-keeping space needs to be gas conditioned and whether the gas conditioning is completed. Specifically, an oxygen concentration sensor is arranged in each fresh-keeping space. The oxygen concentration sensor is used for detecting the oxygen control interval in real time, the electric four-way valve is used for controlling the passage, and the oxygen reduction speed and the minimum value of oxygen reduction for oxygen control and preservation can be effectively improved through program optimization control. The judgment of whether the two fresh-keeping spaces need to be subjected to gas regulation is carried out when a compressor of the refrigerator is in a stop state. And when the compressor is stopped, oxygen control is carried out, so that the interference between oxygen control and refrigeration can be reduced.

In some embodiments of the invention, each modified atmosphere preservation device is installed in one storage compartment, and each door body is configured to open or close one storage compartment; the control method of the refrigerator further comprises the following steps: and detecting whether the door body is opened. When the door body is opened, whether the air-conditioning membrane assembly of the air-conditioning preservation device corresponding to the door body works is judged. And if the modified atmosphere module of the modified atmosphere preservation device is in the working state, the modified atmosphere module of the modified atmosphere preservation device is suspended to work. Wherein, the air-conditioning film assembly of the air-conditioning fresh-keeping device is in a working state by the two air exhaust devices. When the door body is closed, whether the air-conditioning membrane component of the corresponding air-conditioning preservation device is in a work pause state is detected. If the controlled atmosphere module of the controlled atmosphere preservation device is in the pause working state, the controlled atmosphere module of the controlled atmosphere preservation device continues to work. And if the corresponding controlled atmosphere module of the controlled atmosphere preservation device is in a shutdown state, detecting whether the controlled atmosphere preservation device is opened. If the gas-conditioning preservation device is opened, judging whether the corresponding preservation space needs to be subjected to gas conditioning or not after the door body is closed for the first preset time. Otherwise, after the door body is closed for a second preset time, whether the corresponding fresh-keeping space needs to be subjected to gas regulation or not is judged. The second preset time is less than the first preset time. The associated uniformity of oxygen reduction and refrigeration is ensured, the storage of articles is facilitated, and the intelligent degree is high.

When each door body is configured to open or close one storage chamber, the two air-conditioning and fresh-keeping devices 30 can be controlled in a unified way. Alternatively, each controlled atmosphere device 30 can be controlled individually, and one controlled atmosphere module is disconnected from the air extractor 70 by the flow path control device 80, so that the controlled atmosphere modules of the controlled atmosphere device 30 are in a stop state or in a pause state. That is, when one modified atmosphere module 42 is not operating, two gas extraction devices 70 can be in operation.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. The control method of the refrigerator is characterized in that the refrigerator comprises a box body, two controlled atmosphere preservation devices, a flow path control device and two air exhaust devices, wherein the two controlled atmosphere preservation devices are arranged in the box body, a preservation space is limited in each controlled atmosphere preservation device, each controlled atmosphere preservation device comprises a controlled atmosphere assembly, and the two controlled atmosphere assemblies are communicated with the two air exhaust devices through the flow path control devices in a controlled manner; the control method of the refrigerator comprises the following steps:

2. The method of controlling a refrigerator according to claim 1, further comprising:

and in the process of gas regulation in both the two fresh-keeping spaces, when one of the fresh-keeping spaces completes the gas regulation, the flow path control device is controlled to enable the gas-regulating membrane component corresponding to the other fresh-keeping space to be communicated with both the two air exhaust devices.

3. The method of controlling a refrigerator according to claim 1, further comprising:

and in the process of gas regulation in one fresh-keeping space, when the other fresh-keeping space also needs to be subjected to gas regulation, the flow path control device is controlled to enable the two gas-regulating membrane assemblies to be respectively communicated with the two air extraction devices.

4. The control method of the refrigerator according to claim 2 or 3,

and judging whether the corresponding fresh-keeping space needs to be subjected to gas regulation or not and whether the gas regulation is finished or not by detecting the oxygen concentration in each fresh-keeping space.

5. The method of claim 1, wherein at least two storage compartments are further disposed in the refrigerator body, the refrigerator further comprises at least two door bodies, each modified atmosphere preservation device is installed in one of the storage compartments, and each door body is configured to open or close one of the storage compartments; wherein the control method of the refrigerator further comprises:

detecting whether the door body is opened or not;

6. The control method of a refrigerator according to claim 1,

and judging whether the two fresh-keeping spaces need to be subjected to gas regulation or not when a compressor of the refrigerator is in a stop state.

7. The control method of a refrigerator according to claim 1,

and the preset storage temperatures in the two fresh-keeping spaces are different.

8. The control method of a refrigerator according to claim 1,

the flow path control device is an electric four-way valve, an oxygen concentration sensor is arranged in each fresh-keeping space, each air extractor comprises a vacuum pump, a compressor bin is arranged in the box body, and the two air extractors are arranged in the compressor bin.

9. The method for controlling the refrigerator according to claim 1, wherein the refrigerator further comprises two moisture permeable devices, two air supply devices and two air guide devices, a communication port is arranged at the rear part of the upper surface of the modified atmosphere preservation device, each moisture permeable device is installed at the communication port of one modified atmosphere preservation device, and the moisture permeable devices are provided with moisture permeable films, so that moisture in the preservation space can unidirectionally permeate to the outside of the preservation space through the moisture permeable films; each air supply device is arranged above one air-conditioning preservation device, and an air inlet of each air supply device faces to part or all of the corresponding moisture permeable film; each air guide device is arranged on the upper side of one air-conditioning preservation device, the rear end of each air guide device is communicated with the cooling chamber of the refrigerator, and the air guide devices are configured to supply air to at least the front part and/or the front part of the air-conditioning preservation device.

10. The method of claim 1, wherein the refrigerator further comprises two temperature controlled heat conducting devices; the air pumping device comprises a pump head with an outlet, an exhaust pipe and a motor, the temperature-controlled heat conduction device is configured to transfer heat generated by the motor to the pump head, and the heat transfer is cut off after the temperature of the pump head reaches a preset temperature;