CN107062735B - Refrigerator and control method thereof - Google Patents

Refrigerator and control method thereof Download PDF

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Publication number
CN107062735B
CN107062735B CN201611262483.8A CN201611262483A CN107062735B CN 107062735 B CN107062735 B CN 107062735B CN 201611262483 A CN201611262483 A CN 201611262483A CN 107062735 B CN107062735 B CN 107062735B
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CN
China
Prior art keywords
temperature
drawer
cover body
refrigerator
refrigerating chamber
Prior art date
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Active
Application number
CN201611262483.8A
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Chinese (zh)
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CN107062735A (en
Inventor
李登强
费斌
刘金林
尚亚洲
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Qingdao Haier Co Ltd
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Qingdao Haier Co Ltd
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Priority to CN201611262483.8A priority Critical patent/CN107062735B/en
Publication of CN107062735A publication Critical patent/CN107062735A/en
Priority to PCT/CN2017/120380 priority patent/WO2018121786A1/en
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Publication of CN107062735B publication Critical patent/CN107062735B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention provides a refrigerator, which comprises a refrigerating chamber, a drawer and a cover body, wherein the refrigerating chamber is formed by enclosing an inner container; the method is characterized in that: the cover body is provided with at least one bulge protruding towards the liner rib, and the liner rib is provided with accommodating grooves corresponding to the bulges one to one; the refrigerator also comprises a driving mechanism for driving the cover body to move along the front-back direction relative to the drawer and a controller in communication connection with the driving mechanism, wherein the driving mechanism comprises a screw rod extending along the front-back direction, a motor for driving the screw rod to rotate and a nut which is sleeved on the screw rod and is matched with threads on the screw rod, and the nut is fixedly connected to the cover body to limit the nut to rotate along with the screw rod and limit the nut to move back and forth relative to the cover body. The drawer of the refrigerator can accurately realize temperature control, and the temperature fluctuation range is small.

Description

Refrigerator and control method thereof
Technical Field
the invention relates to a refrigerator, in particular to a refrigerator with a constant-temperature freezing drawer and a control method thereof.
Background
the traditional air-cooled refrigerator has large temperature fluctuation due to factors such as working logic, defrosting and the like; especially, the food freshness can be affected during defrosting, and the nutrient components can be lost. The existing refrigerator is provided with a sealing cover on a drawer of a freezing chamber, but because an air blowing port and an air return port are reserved on the drawer, the sealing is not strictly sealed, in the processes of cooling and heating the freezing chamber of the refrigerator, the temperature inside the drawer is basically consistent with the temperature outside the drawer, and the temperature difference fluctuation is not greatly improved.
In view of the above problems, it is desirable to provide a refrigerator and a control method thereof to solve the above problems.
disclosure of Invention
In order to achieve the purpose of the invention, the invention provides a refrigerator with a constant-temperature freezing drawer and a control method thereof.
in order to achieve the purpose, the invention provides a refrigerator which comprises a refrigerating chamber, a drawer and a cover body, wherein the refrigerating chamber is formed by enclosing an inner container; the cover body is provided with at least one bulge protruding towards the liner rib, and the liner rib is provided with accommodating grooves corresponding to the bulges one to one; the refrigerator also comprises a driving mechanism for driving the cover body to move along the front-back direction relative to the drawer and a controller in communication connection with the driving mechanism, wherein the driving mechanism comprises a screw rod extending along the front-back direction, a motor for driving the screw rod to rotate and a nut which is sleeved on the screw rod and is matched with the screw thread on the screw rod, and the nut is fixedly connected to the cover body so as to limit the nut to rotate along with the screw rod and limit the nut to move back and forth relative to the cover body; the refrigerator also comprises a refrigerating system for providing cold energy for the refrigerating chamber, a fan for conveying the cold energy generated by the refrigerating system into the refrigerating chamber, an air channel and a controller, wherein the refrigerating system and the fan are in communication connection with the controller; the inner container is provided with an air outlet communicated with the air duct, and when the drawer is positioned in the refrigerating chamber, the air outlet is positioned on one side of the drawer.
As a further improvement of the present invention, a limiting member is disposed on the rear side of the cover body, the limiting member includes an accommodating cavity for accommodating the nut, and a front wall and a rear wall that enclose the accommodating cavity to form the accommodating cavity, the periphery of the nut has a limiting block that cooperates with the accommodating cavity to limit the nut to rotate with the screw, through holes for the screw to pass through are disposed on the front wall and the rear wall, and the aperture of the through hole is smaller than the outer diameter of the nut.
As a further improvement of the present invention, the limiting member further includes a connecting wall 423 for connecting the front wall and the rear wall, and an opening provided on the connecting wall 423 for placing the nut into the accommodating cavity; the front wall and the rear wall are provided with guide grooves which are inwards sunken from one side of the opening to the through hole; the width of the guide groove is not less than the diameter of the screw.
As a further improvement of the invention, a limiting piece is arranged at the rear side of the cover body, and the limiting piece comprises an accommodating cavity matched with the nut; the nut is non-circular. .
As a further improvement of the present invention, when the driving mechanism drives the cover to move in the front-rear direction relative to the drawer, the protrusion is separated from the receiving groove and supported on the liner rib, and a gap is formed between the cover and the drawer; the air outlet is arranged on the inner container at a position corresponding to the gap.
As a further improvement of the invention, a seal is provided between the lid and the drawer.
In order to achieve the above object, the present invention further provides a control method of a refrigerator, the refrigerator further comprising a temperature sensor in communication with the controller to sense a temperature in the refrigerating compartment, the control method comprising the steps of:
a 1: judging whether the temperature in the refrigerating chamber rises to the starting temperature, if so, starting the fan and the compressor and skipping to the step a 2; if not, the compressor and the fan keep in a stop state;
a 2: judging whether the temperature in the refrigerating chamber is reduced to a temperature lower than the starting temperature by a first preset temperature value or not, if so, controlling the driving mechanism to drive the cover body to move along the front-back direction by the controller so that the bulge is separated from the accommodating groove and supported on the liner rib, and skipping to the step a 3; if not, the fan and the compressor continuously operate until the temperature in the refrigerating chamber is reduced to a temperature lower than the starting temperature by a first preset temperature value;
a 3: judging whether the temperature in the refrigerating chamber is reduced to a temperature which is higher than the shutdown temperature by a second preset temperature value or not, if so, controlling the driving mechanism to drive the cover body to move reversely by the controller so that the bulge is accommodated in the accommodating groove, and skipping to step a 4; if not, the cover body is kept still until the temperature in the refrigerating chamber is reduced to the temperature which is higher than the shutdown temperature by a second preset temperature value;
a 4: judging whether the temperature in the refrigerating chamber is reduced to a shutdown temperature, if so, stopping the fan and the compressor and returning to the step a 1; if not, the fan and the compressor keep running until the temperature in the refrigerating chamber is reduced to shutdown temperature.
In order to achieve the above object, the present invention further provides a control method of a refrigerator, the refrigerator further comprising a second temperature sensor for sensing a temperature inside the drawer, the second temperature sensor being in communication with the controller, the control method comprising the steps of:
b 1: judging whether the temperature in the drawer rises to a starting temperature or not, if so, controlling the fan to start, the compressor to start and the driving mechanism to drive the cover body to move along the front-back direction so that the protrusion is separated from the accommodating groove and supported on the liner rib by the driving mechanism, and jumping to step b 2; if not, the compressor and the fan keep in a stop state; the starting temperature is lower than the normally set starting temperature of the refrigerating chamber by a first preset temperature value;
b 2: judging whether the temperature in the drawer is reduced to a stop temperature or not, if so, controlling the fan to stop, the compressor to stop and the driving mechanism to drive the cover body to move reversely so as to accommodate the bulge in the accommodating groove by the controller; if not, the fan and the compressor continuously operate until the temperature in the refrigerating chamber is reduced to the shutdown temperature; the shutdown temperature is higher than the normally set shutdown temperature of the refrigeration compartment by a second preset temperature value.
In order to achieve the above object, the present invention further provides a control method of a refrigerator, the refrigerator further includes a temperature sensor for sensing a temperature in the cooling compartment, and a second temperature sensor for sensing a temperature in the drawer, the temperature sensor and the second temperature sensor are both in communication connection with the controller, the control method includes the following steps:
c 1: judging whether the temperature in the refrigerating chamber rises to the starting temperature or not, if so, starting the fan and the compressor and skipping to the step c 2; if not, the compressor and the fan keep in a stop state;
c2, judging whether the temperature in the drawer rises to the starting temperature, if so, controlling the fan to start, the compressor to start, and the driving mechanism to drive the cover body to move along the front and back direction so that the protrusion is separated from the accommodating groove and supported on the liner rib, and jumping to the step c 3; if not, jumping to the step c 4; the starting temperature is lower than the starting temperature by a first preset temperature value;
c 3: judging whether the temperature in the drawer is reduced to the shutdown temperature, if so, controlling the driving mechanism to drive the cover body to move reversely by the controller so that the protrusion is accommodated in the accommodating groove, and jumping to the step c4, otherwise, continuing to operate the step c 3; the shutdown temperature is higher than the shutdown temperature by a second preset temperature value;
c 4: judging whether the temperature in the refrigerating chamber is reduced to a shutdown temperature, if so, stopping the fan and the compressor and returning to the step c 1; if not, the fan and the compressor keep running until the temperature in the refrigerating chamber is reduced to shutdown temperature.
The invention has the beneficial effects that: according to the invention, the cover plate is driven by the driving mechanism to move along the front-back direction, and when the bulge is separated from the accommodating groove and supported on the liner rib, a gap is formed between the cover body and the drawer; cold air can uniformly enter the drawer from the gaps from the periphery, so that the temperature of each area in the drawer is uniform; when refrigeration is not needed, the cover body seals the drawer, and other air ports are not arranged on the drawer, so that the sealing effect is good.
Drawings
Fig. 1 is a perspective view of the refrigerator of the present invention, and the refrigerator only shows the inner container.
Fig. 2 is a perspective view illustrating an inner container of the refrigerator shown in fig. 1.
FIG. 3 is a schematic view of the drawer, the cover and the driving mechanism according to the present invention.
fig. 4 is a schematic diagram of the cover and the driving mechanism according to the present invention.
Fig. 5 is an exploded view of fig. 4.
Fig. 6 is a schematic view of fig. 5 at another angle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the drawings are exemplary only, and the invention is not limited to these embodiments.
it should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
in addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1 to 6, a refrigerator 100 according to the present invention includes a refrigerating compartment 2 surrounded by an inner container 1, a refrigerating system (not shown) for providing refrigerating capacity to the refrigerating compartment 2, a fan (not shown) and an air duct (not shown) for transferring the refrigerating capacity generated by the refrigerating system into the refrigerating compartment 2, a drawer 3 disposed in the refrigerating compartment 2, a cover 4 for opening and closing the drawer 3, a driving mechanism 5 for driving the cover 4 to move in a front-back direction relative to the drawer 3, and a controller (not shown), wherein the inner container 1 is provided with an air outlet communicated with the air duct for allowing cold air to enter the refrigerating compartment 2. The refrigerating system, the fan and the driving mechanism 5 are all in communication connection with the controller.
The cover 4 and the drawer 3 have a sealing element therebetween, for example, the cover 4 has a sealing element protruding toward the drawer 3 and matching with the opening of the drawer 3; when the cover 4 is positioned on the drawer 3, a substantially completely sealed drawer 3 can be formed.
the liner 1 is provided with liner ribs 11 which extend along the front-back direction to fix the cover body 4; the cover 4 has at least one protrusion 41 protruding toward the bladder rib 11, and the bladder rib 11 has receiving grooves 12 corresponding to the protrusions 41 one to one. When the protrusion 41 is located in the accommodating groove 12, the cover 4 seals the drawer 3; when the protrusion 41 is separated from the receiving groove 12 and supported on the liner rib 11, a gap is formed between the cover 4 and the drawer 3; cold air can enter into said drawer 3. Since the gap surrounds the opening of the drawer 3, air is supplied from all directions, so that the temperature of all areas in the drawer is uniform.
The driving mechanism 5 includes a screw 51 extending in the front-back direction, a motor 52 for driving the screw 51 to rotate, and a nut 53 sleeved on the screw 51 and engaged with the thread on the screw 51, wherein the nut 53 is fixedly connected to the cover 4 to limit the nut 53 to rotate with the screw 51 and to limit the nut 53 to move back and forth relative to the cover 4. The phrase "the nut 53 is fixedly attached to the lid 4" means that the nut 53 is fixed in position with respect to the lid 4 when the body is used, but the nut and the lid can be detached from each other.
When the motor 52 drives the screw rod 51 to rotate, the screw rod 51 drives the nut 53 to move back and forth, and the nut 53 drives the cover 4 to move back and forth, so that when the protrusion 41 is separated from the accommodating groove 12 and supported on the liner rib 11, a gap for allowing cold air to enter the drawer 3 is formed between the cover 4 and the drawer 3.
Specifically, a limiting member 42 is disposed at the rear side of the cover 4, the limiting member 42 includes an accommodating cavity (not numbered) for accommodating the nut 53, and a front wall 421 and a rear wall 422 enclosing and forming the accommodating cavity, the outer periphery of the nut 53 has a limiting member which is matched with the accommodating cavity to limit the nut 53 to rotate along with the screw 51, the front wall 421 and the rear wall 422 are provided with a through hole 426 for the screw 51 to pass through, and the aperture of the through hole 426 is smaller than the outer diameter of the nut 53; so that the nut 53 does not rotate in the receiving space when the screw rod 51 rotates in the through hole 426.
The mechanism of the limiting block is not limited as long as the limiting block can be matched with the inner wall of the accommodating cavity to prevent the nut 53 from rotating. In one embodiment, the nut 53 is configured in any non-circular structure, the receiving cavity matches the shape of the nut 53, and the nut 53 cannot rotate in the receiving cavity.
The retaining member 42 further includes a connecting wall 423 for connecting the front wall 421 and the rear wall 422, and an opening 424 opened on the connecting wall 423 for placing the nut 53 into the receiving cavity; the front wall 421 and the rear wall 422 are provided with guide grooves 425 recessed inwards from one side of the opening 424 to the through hole 426; the width of the guide groove 425 is not smaller than the diameter of the screw 51. In this embodiment, the opening 424 is opened on the connecting wall 423 at the bottom of the position-limiting member 42. When the screw rod 51 is assembled, the nut 53 is fittingly sleeved on the screw rod 51, the nut 53 is placed into the accommodating cavity from the opening 424, and meanwhile, the screw rod 51 enters the through hole 426 through the guide groove 425; the installation is convenient. In the embodiment without the guide groove 425, the nut 53 is first placed in the receiving space, and the screw 51 is passed through the nut 53 while passing through the through hole 426.
The air outlet is located at one side of the drawer 3, when the driving mechanism 5 drives the cover 4 to move in the front-back direction relative to the drawer 3, the protrusion 41 is separated from the accommodating groove 12 and supported on the liner rib 11, and at this time, a gap is formed between the cover 4 and the drawer 3, and cold air enters the drawer 3 through the gap. Furthermore, the air outlet is formed in the position, corresponding to the gap, of the inner container 1; cold air directly enters the drawer 3 after coming out of the air outlet, and the temperature adjusting speed is high and accurate.
the present invention also provides a control method for the refrigerator 100, in an embodiment where the refrigerator 100 includes a temperature sensor in communication with the controller to sense the temperature in the refrigerating compartment 2, the control method includes the following steps:
a 1: judging whether the temperature in the refrigerating chamber 2 rises to the starting temperature, if so, starting the fan and the compressor and skipping to the step a 2; if not, the compressor and the fan are kept in a stop state.
a 2: judging whether the temperature in the refrigerating compartment 2 is reduced to a temperature lower than the starting temperature by a first preset temperature value, if so, controlling the driving mechanism 5 to drive the cover body 4 to move along the front-back direction so that the protrusion 41 is separated from the accommodating groove 12 and supported on the liner rib 11 by the controller, and jumping to step a 3; if not, the fan and the compressor continuously operate until the temperature in the refrigerating chamber 2 is reduced to a temperature lower than the starting temperature by a first preset temperature value; in the embodiment, the first preset temperature is 2 ℃, in the process, cold air firstly cools the refrigerating chamber 2, and then moves the cover 4 back and forth after the temperature is reduced by 2 ℃, so that the cold air enters the drawer 3 from a gap between the cover 4 and the drawer 3; air with higher temperature can be prevented from entering the drawer 3, so that temperature fluctuation in the drawer 3 is reduced.
a 3: judging whether the temperature in the refrigerating compartment 2 is reduced to a temperature higher than the shutdown temperature by a second preset temperature value, if so, controlling the driving mechanism 5 to drive the cover 4 to move reversely to enable the protrusion 41 to be accommodated in the accommodating groove 12, and skipping to step a 4; if not, the cover body 4 is kept still until the temperature in the refrigerating chamber 2 is reduced to the temperature which is higher than the shutdown temperature by a second preset temperature value; in this embodiment, the second preset temperature is 2 ℃, in the process, when the temperature of the refrigerating compartment 2 is higher than the shutdown temperature by 2 ℃, the cover 4 is reset to seal the drawer 3, so that air with lower temperature can be prevented from entering the drawer 3, and temperature fluctuation in the drawer 3 is reduced; in addition, through the matching of the cover body 4 and the drawer 3, the temperature change in the drawer 3 is small, and the freezing effect is good; and the time for directly blowing cold air into the drawer 3 is reduced, and the moisture retention performance is improved.
a 4: judging whether the temperature in the refrigerating chamber 2 is reduced to a shutdown temperature, if so, stopping the fan and the compressor and returning to the step a 1; if not, the fan and the compressor keep running until the temperature in the refrigerating chamber 2 is reduced to the shutdown temperature.
in conclusion, in the control method, the temperature difference inside the drawer 3 is smaller than that of the refrigerating chamber 2, and the temperature change inside the drawer 3 is small and the refrigerating effect is good through the matching of the cover body 4 and the drawer 3; and the time for directly blowing cold air into the drawer 3 is reduced, and the moisture retention performance is improved.
the present invention also provides another control method of the refrigerator 100, in an embodiment where the refrigerator 100 includes only the second temperature sensor to sense the temperature inside the drawer 3, the control method including the steps of:
b 1: judging whether the temperature in the drawer 3 rises to a starting temperature, if so, controlling the fan to start, the compressor to start, and the driving mechanism 5 to drive the cover 4 to move along the front-back direction so that the protrusion 41 is separated from the accommodating groove 12 and supported on the liner rib 11, and jumping to step b 2; if not, the compressor and the fan keep in a stop state; the starting temperature is lower than the normally set starting temperature of the refrigerating compartment 2 by a first preset temperature value; in this embodiment, the first preset temperature is 2 ℃, and the temperature in the drawer 3 is directly sensed by the second temperature sensor to provide cold energy in real time, so that the temperature control in the freezing drawer 3 is more accurate. In addition, the starting temperature is lower than the normally set starting temperature of the refrigerating chamber 2, so that cold energy can be provided for the drawer 3 in time, and the temperature in the drawer 3 is reduced.
b 2: judging whether the temperature in the drawer 3 is reduced to a stop temperature, if so, controlling the fan to stop, the compressor to stop and the driving mechanism 5 to drive the cover body 4 to move reversely so that the protrusion 41 is accommodated in the accommodating groove 12 by the controller; if not, the fan and the compressor continuously operate until the temperature in the refrigerating chamber 2 is reduced to the shutdown temperature; the shutdown temperature is higher than the normally set shutdown temperature of the refrigerating compartment 2 by a second preset temperature value. In this embodiment, the second preset temperature is 2 ℃, and the shutdown temperature is higher than the normally set shutdown temperature of the refrigeration compartment 2 by a second preset temperature value, so that the supply of cold energy to the drawer 3 can be stopped in time, and the temperature in the drawer 3 is reduced; meanwhile, the temperature setting limit value in the drawer 3 is within the temperature setting limit value of the common refrigeration compartment 2, and the temperature variable range is small.
The present invention also provides another control method of the refrigerator 100, in an embodiment where the refrigerator 100 includes a temperature sensor for sensing the temperature in the cooling compartment 2 and a second temperature sensor for sensing the temperature in the drawer 3, the control method includes the following steps:
c 1: judging whether the temperature in the refrigerating chamber 2 rises to the starting temperature, if so, starting the fan and the compressor and skipping to the step c 2; if not, the compressor and the fan keep in a stop state;
c2, judging whether the temperature in the drawer 3 rises to the starting temperature, if so, controlling the fan to start, the compressor to start, and the driving mechanism 5 to drive the cover 4 to move along the front and back direction so that the bulge 41 is separated from the containing groove 12 and supported on the liner rib 11, and jumping to the step c 3; if not, jumping to the step c 4; the starting temperature is lower than the starting temperature by a first preset temperature value. In this embodiment, the first preset temperature is 2 ℃, and in the process, when the compressor and the fan operate, it is determined whether the drawer 3 needs to be refrigerated, so that the temperature can be controlled more accurately; the starting temperature is 2 ℃ lower than the starting temperature, so that air with higher temperature can be prevented from entering the drawer 3, and temperature fluctuation in the drawer 3 is reduced.
c 3: judging whether the temperature in the drawer 3 is reduced to a shutdown temperature, if so, controlling the driving mechanism 5 to drive the cover 4 to move reversely so that the protrusion 41 is accommodated in the accommodating groove 12, and jumping to step c4, otherwise, continuing to operate step c 3; the shutdown temperature is higher than the shutdown temperature by a second preset temperature value; in this embodiment, the second preset temperature is 2 ℃, and in the process, when the compressor and the fan operate, it is determined whether the drawer 3 needs to be refrigerated, so that the temperature can be controlled more accurately; the shutdown temperature is 2 ℃ higher than the shutdown temperature, so that air with lower temperature can be prevented from entering the drawer 3, and temperature fluctuation in the drawer 3 is reduced.
c 4: judging whether the temperature in the refrigerating chamber 2 is reduced to a shutdown temperature, if so, stopping the fan and the compressor and returning to the step c 1; if not, the fan and the compressor keep running until the temperature in the refrigerating chamber 2 is reduced to the shutdown temperature.
in the method, the compressor and the fan are controlled to start and stop through temperature signals fed back by the temperature sensor, and whether the cover body 4 is moved or not is controlled to provide cold energy for the drawer 3 through the temperature signals fed back by the second temperature sensor; the temperature control inside the drawer 3 is accurate, and meanwhile, the temperature of the refrigerating chamber 2 where the drawer 3 is located is also in a good state, so that the temperature fluctuation in the drawer 3 can be further reduced.
In summary, in the present invention, the driving mechanism 5 drives the cover plate 4 to move along the front-back direction, and when the protrusion 41 is separated from the receiving slot 12 and supported on the liner rib 11, a gap is formed between the cover 4 and the drawer 3; cold air can uniformly enter the drawer 3 from the gaps from the periphery, so that the temperature of each area in the drawer 3 is uniform; when refrigeration is not needed, the cover body 4 seals the drawer 3, and other air ports are not arranged on the drawer 3, so that the sealing effect is good.
it is specifically noted that equivalent variations of the present invention taught by those skilled in the art are within the scope of the present invention as claimed.

Claims (9)

1. A refrigerator comprises a refrigerating chamber formed by enclosing an inner container, a drawer arranged in the refrigerating chamber and a cover body used for opening and closing the drawer, wherein the inner container is provided with a container rib which extends along the front-back direction to fix the cover body; the method is characterized in that: the cover body is provided with at least one bulge protruding towards the liner rib, and the liner rib is provided with accommodating grooves corresponding to the bulges one to one; the refrigerator also comprises a driving mechanism for driving the cover body to move along the front-back direction relative to the drawer and a controller in communication connection with the driving mechanism, wherein the driving mechanism comprises a screw rod extending along the front-back direction, a motor for driving the screw rod to rotate and a nut which is sleeved on the screw rod and is matched with the screw thread on the screw rod, and the nut is fixedly connected to the cover body so as to limit the nut to rotate along with the screw rod and limit the nut to move back and forth relative to the cover body; the refrigerator also comprises a refrigerating system for providing cold energy for the refrigerating chamber, a fan for conveying the cold energy generated by the refrigerating system into the refrigerating chamber, an air channel and a controller, wherein the refrigerating system and the fan are in communication connection with the controller; the inner container is provided with an air outlet communicated with the air duct, and when the drawer is positioned in the refrigerating chamber, the air outlet is positioned on one side of the drawer.
2. The refrigerator according to claim 1, wherein: the rear side of lid is equipped with the locating part, the locating part is including being used for acceping the nut accept the chamber and enclose and establish and form accept antetheca, the back wall in chamber, the periphery of nut have with accept the chamber cooperation in order to restrict the nut is along with the rotatory stopper of screw rod, the antetheca with be equipped with the confession on the back wall the through-hole that the screw rod passed, the aperture of through-hole is less than the external diameter of nut.
3. The refrigerator according to claim 2, wherein: the limiting piece further comprises a connecting wall for connecting the front wall and the rear wall, and an opening formed in the connecting wall and used for placing the nut into the accommodating cavity; the front wall and the rear wall are provided with guide grooves which are inwards sunken from one side of the opening to the through hole; the width of the guide groove is not less than the diameter of the screw.
4. The refrigerator according to claim 1, wherein: a limiting piece is arranged on the rear side of the cover body and comprises an accommodating cavity matched with the nut; the nut is non-circular.
5. the refrigerator according to claim 1, wherein: when the driving mechanism drives the cover body to move relative to the drawer along the front-back direction, the bulge is separated from the accommodating groove and supported on the liner rib, and a gap is formed between the cover body and the drawer at the moment; the air outlet is arranged on the inner container at a position corresponding to the gap.
6. The refrigerator according to claim 1, wherein: a seal is provided between the lid and the drawer.
7. A refrigerator control method for the refrigerator of any one of claims 1 to 6, characterized in that: the refrigerator also comprises a temperature sensor which is in communication connection with the controller to sense the temperature in the refrigerating chamber, and the control method comprises the following steps:
a 1: judging whether the temperature in the refrigerating chamber rises to the starting temperature, if so, starting the fan and the compressor and skipping to the step a 2; if not, the compressor and the fan keep in a stop state;
a 2: judging whether the temperature in the refrigerating chamber is reduced to a temperature lower than the starting temperature by a first preset temperature value or not, if so, controlling the driving mechanism to drive the cover body to move along the front-back direction by the controller so that the bulge is separated from the accommodating groove and supported on the liner rib, and skipping to the step a 3; if not, the fan and the compressor continuously operate until the temperature in the refrigerating chamber is reduced to a temperature lower than the starting temperature by a first preset temperature value;
a 3: judging whether the temperature in the refrigerating chamber is reduced to a temperature which is higher than the shutdown temperature by a second preset temperature value or not, if so, controlling the driving mechanism to drive the cover body to move reversely by the controller so that the bulge is accommodated in the accommodating groove, and skipping to step a 4; if not, the cover body is kept still until the temperature in the refrigerating chamber is reduced to the temperature which is higher than the shutdown temperature by a second preset temperature value;
a 4: judging whether the temperature in the refrigerating chamber is reduced to a shutdown temperature, if so, stopping the fan and the compressor and returning to the step a 1; if not, the fan and the compressor keep running until the temperature in the refrigerating chamber is reduced to shutdown temperature.
8. A refrigerator control method for the refrigerator of any one of claims 1 to 6, characterized in that: the refrigerator also comprises a second temperature sensor used for sensing the temperature in the drawer, the second temperature sensor is in communication connection with the controller, and the control method comprises the following steps:
b 1: judging whether the temperature in the drawer rises to a starting temperature or not, if so, controlling the fan to start, the compressor to start and the driving mechanism to drive the cover body to move along the front-back direction so that the protrusion is separated from the accommodating groove and supported on the liner rib by the driving mechanism, and jumping to step b 2; if not, the compressor and the fan keep in a stop state; the starting temperature is lower than the normally set starting temperature of the refrigerating chamber by a first preset temperature value;
b 2: judging whether the temperature in the drawer is reduced to a stop temperature or not, if so, controlling the fan to stop, the compressor to stop and the driving mechanism to drive the cover body to move reversely so as to accommodate the bulge in the accommodating groove by the controller; if not, the fan and the compressor continuously operate until the temperature in the refrigerating chamber is reduced to the shutdown temperature; the shutdown temperature is higher than the normally set shutdown temperature of the refrigeration compartment by a second preset temperature value.
9. A refrigerator control method for the refrigerator of any one of claims 1 to 6, the refrigerator further comprising a temperature sensor for sensing a temperature in the refrigerating compartment, a second temperature sensor for sensing a temperature in the drawer, the temperature sensor and the second temperature sensor being both in communication connection with the controller, the control method comprising the steps of:
c 1: judging whether the temperature in the refrigerating chamber rises to the starting temperature or not, if so, starting the fan and the compressor and skipping to the step c 2; if not, the compressor and the fan keep in a stop state;
c2, judging whether the temperature in the drawer rises to the starting temperature, if so, controlling the fan to start, the compressor to start, and the driving mechanism to drive the cover body to move along the front and back direction so that the protrusion is separated from the accommodating groove and supported on the liner rib, and jumping to the step c 3; if not, jumping to the step c 4; the starting temperature is lower than the starting temperature by a first preset temperature value;
c 3: judging whether the temperature in the drawer is reduced to the shutdown temperature, if so, controlling the driving mechanism to drive the cover body to move reversely by the controller so that the protrusion is accommodated in the accommodating groove, and jumping to the step c4, otherwise, continuing to operate the step c 3;
c 4: judging whether the temperature in the refrigerating chamber is reduced to a shutdown temperature, if so, stopping the fan and the compressor and returning to the step c 1; if not, the fan and the compressor keep running until the temperature in the refrigerating chamber is reduced to shutdown temperature; the shutdown temperature is higher than the shutdown temperature by a second preset temperature value.
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