CN114440527B - Refrigerator and control method thereof - Google Patents

Refrigerator and control method thereof Download PDF

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Publication number
CN114440527B
CN114440527B CN202011194100.4A CN202011194100A CN114440527B CN 114440527 B CN114440527 B CN 114440527B CN 202011194100 A CN202011194100 A CN 202011194100A CN 114440527 B CN114440527 B CN 114440527B
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CN
China
Prior art keywords
freezing
temperature
refrigerating
air
duct
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Application number
CN202011194100.4A
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Chinese (zh)
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CN114440527A (en
Inventor
刘玉民
蔡金伶
孙彬
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Hisense Ronshen Guangdong Refrigerator Co Ltd
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Hisense Ronshen Guangdong Refrigerator Co Ltd
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Application filed by Hisense Ronshen Guangdong Refrigerator Co Ltd filed Critical Hisense Ronshen Guangdong Refrigerator Co Ltd
Priority to CN202011194100.4A priority Critical patent/CN114440527B/en
Publication of CN114440527A publication Critical patent/CN114440527A/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
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with compartments at different temperatures
    • 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
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/067—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by air ducts
    • 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
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

The application discloses a refrigerator and a control method thereof, relates to the technical field of storage equipment, and aims to solve the problem that a mechanical air door cannot adjust the air inlet quantity in real time in the prior art. The refrigerator comprises a refrigerator body, a refrigerating chamber, a refrigerating air duct shell, a refrigerating air supply port and a refrigerating air supply port, wherein the refrigerating chamber, the refrigerating chamber and the air duct shell are arranged in the refrigerator body; a fan and an elastic piece are arranged in the freezing air delivery duct, and wind generated by the fan can enable the elastic piece to elastically deform so as to adjust a gap between the elastic piece and the inner wall of the freezing air delivery duct; the refrigerator further comprises a first temperature sensor for detecting the temperature of the freezing chamber, a second temperature sensor for detecting the temperature of the refrigerating chamber, and a control module electrically connected with the fan, the first temperature sensor and the second temperature sensor respectively. The application is used for storing food materials.

Description

Refrigerator and control method thereof
Technical Field
The application relates to the technical field of storage equipment, in particular to a refrigerator and a control method thereof.
Background
The refrigerator is an electric appliance commonly used in the life of people, and is a refrigeration device for keeping constant low temperature, for example, when the temperature of meat food reaches the freezing temperature (for example, less than or equal to-18 ℃), the preservation time can be prolonged, so that the storage and preservation time of the food can be prolonged through the refrigerator.
The prior refrigerator mostly adopts an air cooling mode to refrigerate, a refrigerating chamber and a freezing chamber are arranged in the air cooling refrigerator, an air duct assembly is arranged in the freezing chamber, the air duct assembly comprises an air duct shell and an air duct arranged in the air duct shell, a freezing air supply opening and a refrigerating air supply opening are further arranged on the air duct shell, a fan is arranged in the air duct, the cold energy prepared by a refrigerator compressor is respectively fed into the freezing chamber and the refrigerating chamber through the freezing air supply opening and the refrigerating air supply opening by the air blown by the fan, so that the temperature of the freezing chamber and the temperature of the refrigerating chamber are reduced, the air cooling refrigerator generally requires that the temperature of the refrigerating chamber is between 0 ℃ and 4 ℃ and the temperature of the freezing chamber is less than or equal to-18 ℃ under the environment temperature of 10 ℃ to 43 ℃.
In order to adjust the cold distribution ratio of the freezing chamber and the refrigerating chamber, a mechanical air door is arranged at the refrigerating air supply opening of the refrigerator in the prior art, the size of the refrigerating air supply opening can be changed by manually adjusting the mechanical air door by a user, when the size of the refrigerating air supply opening is increased or reduced, the air supply amount through the refrigerating air supply opening is correspondingly increased or reduced, the cold quantity fed into the refrigerating chamber is correspondingly increased or reduced, and the total cold quantity prepared by the compressor of the refrigerator is unchanged, so that the cold quantity fed into the freezing chamber is correspondingly reduced or increased, and the cold distribution ratio of the refrigerating chamber and the freezing chamber can be adjusted.
However, the mechanical air door is manually adjusted by a user, and after the mechanical air door is adjusted, the air supply amount sent into the storage chamber becomes a fixed value, namely the cold distribution ratio between the refrigerating chamber and the freezing chamber is unchanged, and if the temperature in the refrigerating chamber is too low or too high, the user does not adjust the size of the mechanical air door in time, so that the fresh keeping and the storage effect of food materials can be affected.
Disclosure of Invention
The embodiment of the application provides a refrigerator and a control method thereof, which can detect the temperature of a storage room in real time, adjust the air supply quantity of the storage room and accurately control the temperature of the storage room so as to ensure the fresh-keeping and storage effect of food materials.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical scheme:
an embodiment of an aspect of the present application provides a refrigerator, including:
the refrigerator comprises a box body, a refrigerating chamber and a refrigerating chamber are arranged in the box body;
the air duct shell is arranged in the box body, a freezing air supply opening and a refrigerating air supply opening are formed in the air duct shell, a freezing air supply duct and a refrigerating air supply duct are formed in the air duct shell, one end of the freezing air supply duct is communicated with one end of the refrigerating air supply duct, the other end of the freezing air supply duct is communicated with the freezing chamber through the freezing air supply opening, and the other end of the refrigerating air supply duct is communicated with the refrigerating chamber through the refrigerating air supply opening;
the fan is arranged in the freezing air delivery duct;
the elastic piece is arranged in the freezing air delivery duct, the elastic piece is arranged between the fan and the refrigerating air delivery opening or between the fan and the freezing air delivery opening, and the air pressure generated by the fan can enable the elastic piece to elastically deform so as to adjust the gap between the elastic piece and the inner wall of the freezing air delivery duct;
a first temperature sensor for detecting a temperature of the freezing chamber;
a second temperature sensor for detecting a temperature of the refrigerating chamber;
the control module is electrically connected with the fan, and the first temperature sensor and the second temperature sensor are electrically connected with the signal input end of the control module.
The refrigerator provided by the embodiment of the application is characterized in that the elastic piece is arranged in the freezing air delivery channel, the elastic piece is arranged between the fan and the refrigerating air delivery opening or between the fan and the refrigerating air delivery opening, the air delivery pressure of the fan can elastically deform the elastic piece, and when the elastic piece elastically deforms, the gap between the elastic piece and the inner wall of the freezing air delivery channel can be changed, so that the air delivery quantity of the refrigerating chamber or the freezing chamber can be adjusted, namely the cold distribution ratio of the refrigerating chamber and the freezing chamber can be adjusted, and the temperature of the freezing chamber and the refrigerating chamber can be adjusted; compared with the prior art, the temperature of the freezing chamber and the temperature of the refrigerating chamber are detected by the first temperature sensor and the second temperature sensor respectively and are sent to the control module, the control module controls the wind speed of the fan according to the temperatures of the freezing chamber and the refrigerating chamber, so that the elastic piece is elastically deformed to adjust the gap between the elastic piece and the inner wall of the freezing air delivery duct, namely, the air delivery quantity of the freezing chamber and the air delivery quantity of the refrigerating chamber, namely, the cold distribution ratio of the freezing chamber and the refrigerating chamber, so that the temperatures of the refrigerating chamber and the refrigerating chamber can be adjusted in real time, the user is not required to manually adjust, the situation that the temperature fluctuation of the refrigerating chamber or the freezing chamber is large is avoided, and the freshness and the storage effect of food materials are improved.
In some embodiments of the present application, the elastic member is a spring, a length direction of the spring is parallel to a rear wall of the case, and a width direction of the spring is perpendicular to the rear wall of the case;
when the rotating speed of the fan is increased, at least one end of the elastic sheet is bent along the air supply direction of the fan, and a gap between the end of the elastic sheet and the side wall of the adjacent freezing air supply duct is increased;
when the rotating speed of the fan is reduced, the end part of the elastic sheet is reset, and a gap between the end part of the elastic sheet and the adjacent side wall of the freezing air delivery duct is reduced.
In some embodiments of the present application, a protrusion is disposed in the refrigeration air delivery duct, the protrusion is disposed between the fan and the refrigeration air delivery port or between the fan and the refrigeration air delivery port, the protrusion divides the refrigeration air delivery duct into a first air duct and a second air duct which are parallel to each other, one ends of the first air duct and the second air duct are both communicated with the refrigeration air delivery duct, the other ends of the first air duct and the second air duct are both communicated with the refrigeration air delivery port, the middle part of the elastic sheet is fixed on the protrusion, and two ends of the elastic sheet are respectively located in the first air duct and the second air duct.
In some embodiments of the present application, the freezing chamber is disposed above the refrigerating chamber, the air duct housing is disposed in the freezing chamber, the refrigeration air supply opening is disposed at an upper portion of the air duct housing and on a surface of the air duct housing away from a rear wall of the freezing chamber, and the refrigeration air supply opening is disposed on a bottom surface of the air duct housing.
In some embodiments of the present application, the air duct housing includes a front cover plate and a rear cover plate, the front cover plate and the rear cover plate are fastened and fixed with each other, and the refrigeration air supply opening are both disposed on the front cover plate.
The embodiment of the application also provides a control method of the refrigerator, which comprises the following steps:
detecting the freezing temperature of the freezing chamber and the refrigerating temperature of the refrigerating chamber in real time;
judging whether the freezing temperature is in a first temperature interval and whether the refrigerating temperature is in a second temperature interval;
when the freezing temperature is not in the first temperature interval or the refrigerating temperature is not in the second temperature interval, the rotating speed of the fan is regulated, so that the elastic piece is elastically deformed, the gap between the elastic piece and the inner wall of the freezing air delivery duct is regulated, and the proportion between the air delivery quantity of the freezing chamber and the air delivery quantity of the refrigerating chamber is regulated, so that the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval;
and when the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval, the fan normally operates.
According to the control method provided by the embodiment of the application, firstly, the freezing temperature of the freezing chamber and the refrigerating temperature of the refrigerating chamber are detected in real time, then, whether the freezing temperature is in a first temperature interval or not and whether the refrigerating temperature is in a second temperature interval or not are judged, when the freezing temperature is not in the first temperature interval or the refrigerating temperature is not in the second temperature interval, the elastic piece is elastically deformed by adjusting the wind speed of the fan, the gap between the elastic piece and the inner wall of the freezing air delivery channel is changed, so that the air supply quantity of the freezing chamber and the air supply quantity of the refrigerating chamber are adjusted, namely, the cold quantity distribution proportion of the freezing chamber and the refrigerating chamber is adjusted, the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval, the temperature of the freezing chamber and the refrigerating chamber is adjusted in real time, the situation that fluctuation of the freezing temperature or the refrigerating temperature is large is avoided, and the freshness keeping and the storage effect of food materials are improved are facilitated.
In some embodiments of the present application, the method for adjusting the rotational speed of the fan includes the following steps:
when the freezing temperature is smaller than the first temperature interval, increasing the wind speed of the fan, and enabling the elastic piece to elastically deform so as to increase the gap between the elastic piece and the inner wall of the freezing air delivery duct;
when the freezing temperature is greater than the first temperature interval, the wind speed of the fan is reduced, and the elastic piece is reset, so that the gap between the elastic piece and the inner wall of the freezing air delivery duct is reduced.
In some embodiments of the present application, the method for adjusting the rotation speed of the fan further includes the following steps:
when the freezing temperature is in the first temperature interval and the refrigerating temperature is greater than the second temperature interval, increasing the wind speed of the fan to enable the elastic piece to elastically deform so as to increase the gap between the elastic piece and the inner wall of the freezing air delivery duct;
when the freezing temperature is in the first temperature interval and the refrigerating temperature is smaller than the second temperature interval, the wind speed of the fan is reduced, and the elastic piece is reset, so that the gap between the elastic piece and the inner wall of the freezing air delivery duct is reduced.
In some embodiments of the present application, the standard temperature of the freezing chamber is a ℃, and the first temperature interval is a±3 ℃.
In some embodiments of the application, the standard temperature of the refrigerating chamber is b ℃, and the second temperature interval is b±3 ℃.
Drawings
Fig. 1 is a schematic view of the overall structure of a refrigerator according to an embodiment of the present application;
FIG. 2 is an exploded view of an air duct housing and internal structure provided by an embodiment of the present application;
FIG. 3 is a schematic diagram of a control system of a control module according to an embodiment of the present application;
FIG. 4 is a perspective view of an air duct housing (not shown) provided by an embodiment of the present application;
fig. 5 is a schematic structural diagram of an elastic sheet in an initial state when a fan in a freezing air delivery duct provided by the embodiment of the application is not rotated;
fig. 6 is a schematic structural diagram of a shrapnel in a contraction section when a fan in a freezing air delivery duct starts to rotate;
fig. 7 is a schematic structural diagram of bending a spring plate to a maximum position when the rotation speed of a fan in a freezing air delivery duct is maximum in the embodiment of the application;
FIG. 8 is a flowchart of a control method according to an embodiment of the present application;
FIG. 9 is a flowchart of an embodiment of a method for adjusting a rotational speed of a fan according to an embodiment of the present application;
fig. 10 is a flowchart of another embodiment of a fan speed adjusting method according to an embodiment of the present application.
Reference numerals: 100. a case; 110. a freezing chamber; 120. a refrigerating chamber; 121. an electronic knob; 200. a door body; 300. an air duct housing; 310. freezing an air supply outlet; 320. refrigerating and supplying air; 330. a front cover plate; 340. a back cover plate; 400. air duct foam; 410. freezing the air delivery duct; 411. a protrusion; 412. a first air duct; 413. a second air duct; 414. a constriction section; 420. refrigerating and delivering air duct; 421. a mechanical damper; 600. a blower; 700. a control module; 800. a first temperature sensor; 900. and a second temperature sensor.
Detailed Description
A refrigerator and a control method according to embodiments of the present application are described in detail below with reference to the accompanying drawings.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Fig. 1 is a block diagram of a specific embodiment of a refrigerator according to the present application, and the refrigerator according to an embodiment of the present application has an approximately rectangular parallelepiped shape. The appearance of the refrigerator is defined by a storage room defining a storage space, which is a case 100 having an opening, and a plurality of door bodies 200 provided in the storage room, the storage room 101 being vertically partitioned into an upper freezing compartment 110 and a lower refrigerating compartment 120. Each of the partitioned spaces may have an independent storage space.
As shown in fig. 1, an air duct housing 300 is disposed in a box body 100 provided by the embodiment of the application, as shown in fig. 2, a freezing air supply port 310 and a refrigerating air supply port 320 are disposed on the air duct housing 300, an air duct foam 400 is disposed in the air duct housing 300, a freezing air supply duct 410 and a refrigerating air supply duct 420 are formed on the air duct foam 400, one end of the freezing air supply duct 410 is communicated with one end of the refrigerating air supply duct 420, the other end of the freezing air supply duct 410 is communicated with the freezing chamber 110 through the freezing air supply port 310, and the other end of the refrigerating air supply duct 420 is communicated with the refrigerating chamber 120 through the refrigerating air supply port 320.
A fan 600 is provided in the freezing air supply duct 410, so that the cooling capacity prepared by the refrigerator compressor is respectively supplied into the freezing chamber 110 and the refrigerating chamber 120 through the fan 600, thereby reducing the temperatures of the freezing chamber 110 and the refrigerating chamber 120 and freezing and storing or refrigerating and preserving food materials.
An elastic member is further disposed in the freezing air duct, the elastic member is disposed between the fan 600 and the refrigerating air supply outlet 320 or between the fan 600 and the freezing air supply outlet 310, and wind pressure generated by the fan 600 can elastically deform the elastic member to adjust a gap between the elastic member and an inner wall of the freezing air supply duct 410. The present application is described in detail with the elastic member provided between the blower 600 and the refrigerating air supply port 320.
According to the refrigerator provided by the embodiment of the application, the refrigerating air delivery duct 410 and the refrigerating air delivery duct 420 which are mutually communicated are arranged in the air duct housing 300 of the air duct assembly, the refrigerating air delivery port 310 arranged on the air duct housing 300 can be communicated with the refrigerating air delivery duct 410 and the freezing chamber 110, the refrigerating air delivery port 320 can be communicated with the refrigerating air delivery duct 420 and the refrigerating chamber 120, and the fan 600 is arranged in the refrigerating air delivery duct 410, so that air can be blown into the freezing chamber 110 and the refrigerating chamber 120 and refrigeration can be realized.
As shown in fig. 1, 2 and 3, the freezing chamber 110 provided by the present application is provided with a first temperature sensor 800 for detecting temperature, and the refrigerating chamber 120 is provided with a second temperature sensor 900 for detecting temperature.
The refrigerator provided by the application further comprises a control module 700, wherein a signal output end of the control module 700 is electrically connected with a signal input end of the fan 600, and the first temperature sensor 800 and the second temperature sensor 900 are electrically connected with the signal input end of the control module 700.
Compared with the prior art, the refrigerator provided by the application has the advantages that the temperatures of the freezing chamber 110 and the refrigerating chamber 120 are respectively detected by the first temperature sensor 800 and the second temperature sensor 900 and are sent to the control module 700, the control module 700 controls the wind speed of the fan 600 according to the temperatures of the freezing chamber 110 and the refrigerating chamber 120, so that the elastic piece is elastically deformed, the gap between the elastic piece and the inner wall of the freezing air delivery duct 410 is adjusted, namely, the air delivery quantity of the freezing chamber 110 and the air delivery quantity of the refrigerating chamber 120 are adjusted, namely, the cold quantity distribution proportion of the freezing chamber 110 and the refrigerating chamber 120 is adjusted, thereby automatically adjusting the temperatures of the refrigerating chamber 120 and the freezing chamber 110 in real time without manual adjustment of a user, avoiding the situation that the temperature fluctuation of the refrigerating chamber 120 or the freezing chamber 110 is large, and being beneficial to improving the preservation and storage effect of food materials.
As shown in fig. 1 and fig. 4, the elastic member provided by the present application is a spring 500, the length direction of the spring 500 is parallel to the rear wall of the box 100, and the width direction of the spring 500 is perpendicular to the rear wall of the box 100, when the rotation speed of the fan 600 increases, at least one end of the spring 500 is bent along the air supply direction of the fan 600, and the gap between the end of the spring 500 and the adjacent side wall of the refrigeration air delivery duct 410 increases; when the rotation speed of the blower 600 is reduced, the end of the elastic sheet 500 is reset and the gap between the end of the elastic sheet 500 and the adjacent side wall of the freezing and air supplying duct 410 is reduced. When the rotational speed of the blower 600 is increased, the elastic sheet 500 is bent, so that the gap between the elastic sheet 500 and the side wall of the freezing and cooling air duct is increased, that is, the size of the ventilation section in the freezing and cooling air duct 410 is increased, so that the air supply amount of the refrigerating chamber 120 can be increased, and when the rotational speed of the blower 600 is reduced, the elastic sheet 500 is reset, so that the distance between the end of the elastic sheet 500 and the side wall of the freezing and cooling air duct 410 is reduced, that is, the size of the ventilation section in the freezing and cooling air duct is reduced, so that the air supply amount of the refrigerating chamber 120 can be adjusted through the elastic sheet 500, that is, the cold amount distribution ratio of the refrigerating chamber 120 to the freezing chamber 110 is adjusted.
In some embodiments, the spring 500 may be fixed at one end to a side wall of the freezing delivery duct 410, and at the other end, be freely disposed, and be close to the other side wall opposite to the freezing delivery duct 410. Therefore, when the blower 600 supplies air, the free end of the elastic sheet 500 is bent, and the distance between the free end of the elastic sheet 500 and the side wall of the adjacent freezing air delivery duct 410 increases during the bending process.
In some embodiments, as shown in fig. 1 and 4, a protrusion 411 may be disposed in the refrigeration air delivery duct 410, where the protrusion 411 is disposed between the fan 600 and the refrigeration air delivery duct 420, the protrusion 411 divides the refrigeration air delivery duct 410 into a first air duct 412 and a second air duct 413 that are parallel to each other, one end of the first air duct 412 and one end of the second air duct 413 are respectively communicated with the refrigeration air delivery duct 420, the other end of the first air duct 413 are respectively communicated with the refrigeration air delivery duct 310, the middle part of the elastic sheet 500 is fixed on the protrusion 411, and two end parts of the elastic sheet 500 are respectively located in the first air duct 412 and the second air duct 413. Because both ends of the elastic sheet 500 are all freely arranged and are respectively arranged in the first air channel 412 and the second air channel 413, when the fan 600 sends air, cold air enters the refrigerating air delivery channel 420 from the first air channel 412 and the second air channel 413 respectively and enters the refrigerating chamber 120 through the refrigerating air delivery opening 320, the wind pressure of the fan 600 can lead both ends of the elastic sheet 500 to bend, thereby adjusting the size of the ventilation section in the first air channel 412 and the second air channel 413, compared with the size of only one air channel, the refrigerating air delivery channel 410 is divided into the first air channel 412 and the second air channel 413, thereby increasing the air delivery quantity of the refrigerating chamber 120, meeting the cold quantity requirement of the refrigerating chamber 120 more quickly and cooling the refrigerating chamber 120.
In some embodiments, as shown in fig. 1 and fig. 4, a contraction section 414 is disposed on the side wall of the first air duct 412 and the second air duct 413 opposite to the protrusion 411, the contraction section 414 gradually reduces the cross section of the first air duct 412 and the second air duct 413 along the air supply direction of the fan 600, the tail end of the contraction section 414 along the air supply direction is connected with the refrigeration air supply duct 420, when the elastic sheet 500 is in an initial state, i.e. the fan 600 is not rotated, the end of the elastic sheet 500 is located at the contraction section 414, when the fan 600 starts to rotate, the elastic sheet 500 is bent along the air supply direction, and the distance between the elastic sheet 500 and the contraction section 414 of the first air duct 412 and the second air duct 413 is unchanged due to the gradual reduction of the cross section of the contraction section 414, so that when the air speed of the fan 600 is smaller, the air supply amount is prevented from fluctuating, and when the rotation speed of the fan 600 is increased, the end of the elastic sheet 500 passes over the contraction section 414, the ventilation cross section in the first air duct 412 and the second air duct 413 is gradually increased.
When the fan 600 does not rotate, as shown in fig. 5, the elastic piece 500 is at the initial position, that is, the starting end of the contraction section 414 along the air supply direction, when the fan 600 starts to rotate, as shown in fig. 6, the elastic piece 500 is bent, but still in the contraction section 414, in fig. 6, the elastic piece 500 is bent to the end of the contraction section 414 along the air supply direction, when the fan 600 gradually increases the rotation speed, as shown in fig. 7, the elastic piece 500 continues to be bent and passes over the end of the contraction section 414, in fig. 7, the position of the elastic piece 500 is shown when the rotation speed of the fan 600 increases to the maximum, and at this time, the distance between the elastic piece 500 and the inner wall of the refrigeration air supply duct 410 is the maximum, that is, the air supply quantity is the maximum.
In some embodiments, as shown in fig. 4, a mechanical air door 421 may be further disposed at the position of the refrigeration air delivery duct 420, so that a user can manually adjust the air delivery amount of the refrigeration air delivery duct 420, and in cooperation with the elastic sheet 500 and the fan 600, the air delivery amount can be controlled more accurately, which is beneficial to further improving the storage and fresh-keeping effects of the refrigerator.
In the present application, as shown in fig. 1 and 2, the air duct housing 300 of the air duct assembly is disposed in the freezing chamber 110, the refrigerating air supply port 310 is disposed at the upper portion of the air duct housing 300 and on the surface of the air duct housing 300 remote from the rear wall of the freezing chamber 110, and the refrigerating air supply port 320 is disposed on the bottom surface of the air duct housing 300. Because the cold air is heavier, the freezing air supply opening 310 is arranged at the upper part of the air duct housing 300, so that the cold air can circularly flow from top to bottom, and the cold air supply opening 320 is arranged on the bottom surface of the air duct housing 300, and cold air is supplied into the cold storage chamber 120 from top to bottom, thereby ensuring uniform temperature distribution of the storage spaces in the freezing chamber 110 and the cold storage chamber 120, and avoiding dead corners with higher local temperature in the freezing chamber 110 or the cold storage chamber 120.
In some embodiments, the air duct housing 300 may be fixed on the rear wall of the freezing chamber 110, or two side walls of the air duct housing 300 opposite to the freezing chamber 110 may be fixedly connected, and the fixing manner of the air duct housing 300 is not specifically limited.
In some embodiments, as shown in fig. 1 and fig. 2, the air duct housing 300 provided by the present application includes a front cover plate 330 and a rear cover plate 340, the front cover plate 330 and the rear cover plate 340 are fastened and fixed to each other, and the refrigeration air supply opening 310 and the refrigeration air supply opening 320 are both disposed on the front cover plate 330. The air duct shell 300 is formed by the front cover plate 330 and the rear cover plate 340 which are mutually clamped and fixed, so that the air duct foam 400 is filled in the air duct shell 300 conveniently, the air duct and other structures are arranged, the air duct shell 300 is divided into the front cover plate 330 and the rear cover plate 340, the injection molding is convenient, and the production difficulty is reduced conveniently.
The application also provides a control method of the refrigerator, as shown in fig. 8, comprising the following steps: detecting a freezing temperature of the freezing chamber 110 and a refrigerating temperature of the refrigerating chamber 120 in real time; judging whether the freezing temperature is in a first temperature interval and whether the refrigerating temperature is in a second temperature interval; when the freezing temperature is not in the first temperature interval or the refrigerating temperature is not in the second temperature interval, the rotating speed of the fan 600 is adjusted to elastically deform the elastic member and change the gap between the elastic member and the inner wall of the refrigerating air delivery duct 410, so as to adjust the ratio between the air delivery amount of the freezing chamber 110 and the air delivery amount of the refrigerating chamber 120, and the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval; when the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval, the blower 600 operates normally.
According to the control method provided by the embodiment of the application, firstly, the freezing temperature of the freezing chamber 110 and the refrigerating temperature of the refrigerating chamber 120 are detected in real time, then, whether the freezing temperature is in the first temperature interval or not and whether the refrigerating temperature is in the second temperature interval or not are judged, when the freezing temperature is not in the first temperature interval or the refrigerating temperature is not in the second temperature interval, the elastic piece is elastically deformed by adjusting the wind speed of the fan 600, and the gap between the elastic piece and the inner wall of the refrigerating air delivery duct 410 is changed, so that the air supply amount of the freezing chamber 110 and the air supply amount of the refrigerating chamber 120 are adjusted, namely, the cold distribution ratio of the freezing chamber 110 and the refrigerating chamber 120 is adjusted, so that the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval, the temperatures of the freezing chamber 110 and the refrigerating chamber 120 are adjusted in real time, the situation that the freezing temperature or the refrigerating temperature has large fluctuation is avoided, and the freshness and storage effect of food materials are improved.
As shown in fig. 9, the method for adjusting the rotation speed of the fan 600 in the present application includes the following steps: when the freezing temperature is less than the first temperature interval, the rotation speed of the fan 600 is increased, so that the elastic member is elastically deformed, and the gap between the elastic member and the inner wall of the freezing air delivery duct 410 is increased; when the freezing temperature is greater than the first temperature interval, the rotation speed of the blower 600 is reduced, so that the elastic member is reset, and the gap between the elastic member and the inner wall of the freezing delivery duct 410 is reduced. That is, when the temperature of the freezing chamber 110 is low, the rotation speed of the blower 600 is increased, so that the gap between the elastic member and the inner wall of the freezing air delivery duct 410 is increased to increase the air supply amount of the refrigerating chamber 120, that is, to increase the cooling amount of the refrigerating chamber 120, and since the total amount of cooling amount prepared by the refrigerator compressor is constant, the cooling amount fed into the freezing chamber 110 is correspondingly reduced, so that the temperature of the freezing chamber 110 is properly increased, and when the temperature of the freezing chamber 110 is high, the rotation speed of the blower 600 is reduced, so that the gap between the elastic member and the inner wall of the freezing air delivery duct 410 is reduced to reduce the air supply amount of the refrigerating chamber 120, that is, to reduce the cooling amount of the refrigerating chamber 120, so that the cooling amount of the freezing chamber 110 can be increased, that is, the temperature of the freezing chamber 110 and the refrigerating chamber 120 can be adjusted by adjusting the cooling amount distribution ratio of the freezing chamber 110 and the refrigerating chamber 120.
Specifically, when the freezing temperature is higher than the first temperature interval, there may be three cases in which the freezing temperature is lower than, in, or higher than the second temperature interval, and when the freezing temperature is lower than or in the second temperature interval, the rotation speed of the blower 600 is reduced, the amount of cold energy fed into the refrigerating chamber 120 can be reduced and the amount of cold energy of the freezing chamber 110 can be increased, the freezing temperature is reduced and the freezing temperature is increased or a small amount of cold energy is fed into the refrigerating chamber 120 to maintain the temperature, thereby adjusting the freezing temperature to be within the first temperature interval and the refrigerating temperature to be adjusted or maintained within the second temperature interval; when the refrigeration temperature is higher than the second temperature range, i.e. the temperatures of the refrigeration chamber 120 and the freezing chamber 110 are too high, the cooling capacity needs to be increased, and at this time, since the frozen food stored in the freezing chamber 110 is easy to melt, the rotation speed of the fan 600 is reduced, the cooling capacity in the freezing chamber 110 is increased, the freezing temperature of the freezing chamber 110 is reduced to the first temperature range, and then the refrigeration temperature of the refrigeration chamber 120 is adjusted.
When the freezing temperature is lower than the first temperature interval, the refrigerating temperature is also in three conditions, namely lower than the second temperature interval, in the second temperature interval, higher than the second temperature interval, when the refrigerating temperature is higher than the second temperature interval or in the second temperature interval, the rotating speed of the fan 600 is increased, the refrigerating capacity fed into the refrigerating chamber 120 can be increased, the refrigerating capacity of the freezing chamber 110 can be reduced, the freezing temperature is increased, the refrigerating temperature is reduced, and the freezing temperature is adjusted to be in the first temperature interval, and the refrigerating temperature is adjusted or kept in the second temperature interval; when the refrigerating temperature is lower than the second temperature interval, that is, the temperatures of the refrigerating chamber 120 and the freezing chamber 110 are too low, the refrigerating capacity needs to be reduced, and at this time, the compressor is stopped, so that the freezing temperature of the freezing chamber 110 can be raised to the first temperature interval and the refrigerating temperature of the refrigerating chamber 120 can be raised to the second temperature interval.
As shown in fig. 10, the method for adjusting the rotation speed of the fan 600 provided by the application further includes the following steps: when the freezing temperature is within the first temperature range and the refrigerating temperature is greater than the second temperature range, increasing the wind speed of the fan 600 to elastically deform the elastic member so as to increase the gap between the elastic member and the inner wall of the freezing air delivery duct 410; when the freezing temperature is within the first temperature range and the refrigerating temperature is less than the second temperature range, the air speed of the fan 600 is reduced, and the elastic member is reset, so that the gap between the elastic member and the inner wall of the freezing air delivery duct 410 is reduced. When the freezing temperature is in the first temperature interval, the refrigerating temperature is higher than the second temperature interval and the refrigerating temperature is lower than the second temperature interval, when the refrigerating temperature is higher than the second temperature interval, that is, the refrigerating chamber 120 needs to increase the cooling capacity, at this time, the rotating speed of the fan 600 is increased, the cooling capacity fed into the refrigerating chamber 120 is increased, and when the temperature of the refrigerating chamber 120 is lower than the second temperature interval, that is, the refrigerating chamber 120 is too low, at this time, the rotating speed of the fan 600 is reduced, and the cooling capacity fed into the refrigerating chamber 120 is reduced.
The refrigerator provided by the application detects the freezing temperature of the freezing chamber 110 and the refrigerating temperature of the refrigerating chamber 120 in real time, judges whether the freezing temperature is in a first temperature interval and whether the refrigerating temperature is in a second temperature interval, then adjusts the rotating speed of the fan 600 according to the refrigerating temperature and the freezing temperature, bends or resets the elastic sheet 500 to control the gap distance between the elastic sheet 500 and the inner wall of the refrigerating air delivery duct 410, thereby adjusting the air supply amount of the refrigerating chamber 120, further adjusting the ratio of the refrigerating amount of the refrigerating chamber 120 to the refrigerating chamber 110, finally realizing real-time adjustment of the temperatures of the refrigerating chamber 120 and the refrigerating chamber 110, and being beneficial to improving the storage and fresh-keeping effects of the refrigerator.
In some embodiments, the standard temperature of the freezing compartment 110 is a ℃, the first temperature interval is a±3 ℃, the standard temperature of the refrigerating compartment 120 is b ℃, and the second temperature interval is b±3 ℃. By floating 3 deg.c up and down at the standard temperature of the freezing chamber 110 and the standard temperature of the refrigerating chamber 120 as the first temperature section and the second temperature section, i.e., within the range of 3 deg.c up and down at the standard temperature, the storage and fresh-keeping effects of the food materials are not affected.
According to the refrigerator provided by the application, the electronic knob 121 can be used for setting a plurality of gears, each gear has the corresponding standard temperature of the freezing chamber 110 and the standard temperature of the refrigerating chamber 120, and the control module 700 can adjust the temperatures of the freezing chamber 110 and the refrigerating chamber 120 according to the standard temperature, so that when the environment temperature is higher, for example, in summer, a user can adjust the gears to the gear with the lower standard temperature, and when the environment temperature is lower, for example, in winter, the gears can never be adjusted to the gear with the higher standard temperature, thereby avoiding that the environment temperature leads to the higher or lower temperature of the refrigerating chamber 120 or the freezing chamber 110 and affecting the storage and preservation effects of food materials.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A refrigerator, comprising:
the refrigerator comprises a box body, a refrigerating chamber and a refrigerating chamber are arranged in the box body;
the air duct shell is arranged in the box body, a freezing air supply opening and a refrigerating air supply opening are formed in the air duct shell, a freezing air supply duct and a refrigerating air supply duct are formed in the air duct shell, one end of the freezing air supply duct is communicated with one end of the refrigerating air supply duct, the other end of the freezing air supply duct is communicated with the freezing chamber through the freezing air supply opening, and the other end of the refrigerating air supply duct is communicated with the refrigerating chamber through the refrigerating air supply opening;
the fan is arranged in the freezing air delivery duct;
the elastic piece is arranged in the freezing air delivery duct, the elastic piece is arranged between the fan and the refrigerating air delivery opening or between the fan and the freezing air delivery opening, and the air pressure generated by the fan can enable the elastic piece to elastically deform so as to adjust the gap between the elastic piece and the inner wall of the freezing air delivery duct;
a first temperature sensor for detecting a temperature of the freezing chamber;
a second temperature sensor for detecting a temperature of the refrigerating chamber;
the control module is electrically connected with the fan, and the first temperature sensor and the second temperature sensor are electrically connected with the signal input end of the control module;
the elastic piece is an elastic piece, the length direction of the elastic piece is parallel to the rear wall of the box body, and the width direction of the elastic piece is perpendicular to the rear wall of the box body.
2. The refrigerator according to claim 1, wherein,
when the rotating speed of the fan is increased, at least one end of the elastic sheet is bent along the air supply direction of the fan, and a gap between the end of the elastic sheet and the side wall of the adjacent freezing air supply duct is increased;
when the rotating speed of the fan is reduced, the end part of the elastic sheet is reset, and a gap between the end part of the elastic sheet and the adjacent side wall of the freezing air delivery duct is reduced.
3. The refrigerator according to claim 2, wherein a protrusion is provided in the freezing air delivery duct, the protrusion is provided between the fan and the refrigerating air delivery port or between the fan and the freezing air delivery port, the protrusion divides the freezing air delivery duct into a first air duct and a second air duct which are mutually connected in parallel, one ends of the first air duct and the second air duct are communicated with the refrigerating air delivery duct, the other ends of the first air duct and the second air duct are communicated with the refrigerating air delivery port, the middle part of the elastic sheet is fixed on the protrusion, and two ends of the elastic sheet are respectively positioned in the first air duct and the second air duct.
4. A refrigerator according to any one of claims 1 to 3, wherein the freezing chamber is disposed above the refrigerating chamber, the air duct housing is disposed in the freezing chamber, the freezing air supply opening is disposed at an upper portion of the air duct housing and on a surface of the air duct housing away from a rear wall of the freezing chamber, and the refrigerating air supply opening is disposed on a bottom surface of the air duct housing.
5. The refrigerator of claim 4, wherein the air duct housing comprises a front cover plate and a rear cover plate, the front cover plate and the rear cover plate are fastened and fixed to each other, and the refrigeration air supply opening are both arranged on the front cover plate.
6. The control method of a refrigerator as claimed in any one of claims 1 to 5, wherein the control method comprises the steps of:
detecting the freezing temperature of the freezing chamber and the refrigerating temperature of the refrigerating chamber in real time;
judging whether the freezing temperature is in a first temperature interval and whether the refrigerating temperature is in a second temperature interval;
when the freezing temperature is not in the first temperature interval or the refrigerating temperature is not in the second temperature interval, the rotating speed of the fan is regulated, so that the elastic piece is elastically deformed, the gap between the elastic piece and the inner wall of the freezing air delivery duct is regulated, and the proportion between the air delivery quantity of the freezing chamber and the air delivery quantity of the refrigerating chamber is regulated, so that the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval;
and when the freezing temperature is in the first temperature interval and the refrigerating temperature is in the second temperature interval, the fan normally operates.
7. The control method according to claim 6, characterized in that the rotational speed adjustment method of the blower includes the steps of:
when the freezing temperature is smaller than the first temperature interval, increasing the wind speed of the fan, and enabling the elastic piece to elastically deform so as to increase the gap between the elastic piece and the inner wall of the freezing air delivery duct;
when the freezing temperature is greater than the first temperature interval, the wind speed of the fan is reduced, and the elastic piece is reset, so that the gap between the elastic piece and the inner wall of the freezing air delivery duct is reduced.
8. The control method according to claim 6 or 7, characterized in that the rotational speed adjustment method of the blower further comprises the steps of:
when the freezing temperature is in the first temperature interval and the refrigerating temperature is greater than the second temperature interval, increasing the wind speed of the fan to enable the elastic piece to elastically deform so as to increase the gap between the elastic piece and the inner wall of the freezing air delivery duct;
when the freezing temperature is in the first temperature interval and the refrigerating temperature is smaller than the second temperature interval, the wind speed of the fan is reduced, and the elastic piece is reset, so that the gap between the elastic piece and the inner wall of the freezing air delivery duct is reduced.
9. The control method of claim 6, wherein the standard temperature of the freezing chamber is a ℃, and the first temperature interval is a±3 ℃.
10. The control method according to claim 6, wherein the standard temperature of the refrigerating chamber is b ℃, and the second temperature interval is b±3 ℃.
CN202011194100.4A 2020-10-30 2020-10-30 Refrigerator and control method thereof Active CN114440527B (en)

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Publication number Priority date Publication date Assignee Title
CN201322496Y (en) * 2008-12-23 2009-10-07 合肥美的荣事达电冰箱有限公司 One-way sealing air curtain structure without power
CN201757564U (en) * 2010-08-06 2011-03-09 海信容声(广东)冰箱有限公司 Air duct system of frostless refrigerator
CN104089447A (en) * 2013-04-01 2014-10-08 苏州三星电子有限公司 Mechanical air door, air cooling system and air cooling control method for air cooling refrigerator with multiple compartments
CN203949425U (en) * 2014-06-03 2014-11-19 宁波华彩电器有限公司 A kind of wind cooling refrigerator
JP2015145756A (en) * 2014-02-03 2015-08-13 富士電機株式会社 Refrigeration warehouse
CN108332482A (en) * 2018-02-28 2018-07-27 青岛海尔股份有限公司 Refrigerator
CN109000421A (en) * 2018-06-26 2018-12-14 青岛海尔股份有限公司 Refrigerator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201322496Y (en) * 2008-12-23 2009-10-07 合肥美的荣事达电冰箱有限公司 One-way sealing air curtain structure without power
CN201757564U (en) * 2010-08-06 2011-03-09 海信容声(广东)冰箱有限公司 Air duct system of frostless refrigerator
CN104089447A (en) * 2013-04-01 2014-10-08 苏州三星电子有限公司 Mechanical air door, air cooling system and air cooling control method for air cooling refrigerator with multiple compartments
JP2015145756A (en) * 2014-02-03 2015-08-13 富士電機株式会社 Refrigeration warehouse
CN203949425U (en) * 2014-06-03 2014-11-19 宁波华彩电器有限公司 A kind of wind cooling refrigerator
CN108332482A (en) * 2018-02-28 2018-07-27 青岛海尔股份有限公司 Refrigerator
CN109000421A (en) * 2018-06-26 2018-12-14 青岛海尔股份有限公司 Refrigerator

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