CN111486640A - Moisturizing air-cooled refrigerator and control method thereof - Google Patents

Moisturizing air-cooled refrigerator and control method thereof Download PDF

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Publication number
CN111486640A
CN111486640A CN202010327702.6A CN202010327702A CN111486640A CN 111486640 A CN111486640 A CN 111486640A CN 202010327702 A CN202010327702 A CN 202010327702A CN 111486640 A CN111486640 A CN 111486640A
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China
Prior art keywords
refrigerating
freezing
chamber
refrigerator
refrigerating chamber
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CN202010327702.6A
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CN111486640B (en
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崔培培
尚殿波
刘全义
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Changhong Meiling Co Ltd
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Changhong Meiling Co Ltd
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    • 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
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • 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
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • 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
    • 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
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • 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
    • F25D2323/00—General constructional features not provided for in other groups of this subclass
    • F25D2323/02—Details of doors or covers not otherwise covered
    • 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

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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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention discloses a moisturizing air-cooled refrigerator and a control method thereof, and relates to the technical field of moisturizing refrigerators. The invention comprises an electric air door arranged at the joint of a freezing air duct and a refrigerating chamber air supply air duct; a temperature and humidity sensor is arranged on the inner side wall of the refrigerating chamber; a freezing chamber sensor is arranged on the inner side wall of the freezing chamber; a heat-preservation sealing system is arranged between the refrigerating chamber and the refrigerating door body; the heat preservation sealing system comprises a refrigeration door body, a box body side plate, a refrigerator lining, a winding coil assembly and a refrigeration door seal. The invention continuously detects the average relative humidity value RHAv of the refrigerating chamber by utilizing the previous refrigerating periodiCalculating a humidity difference △ RH, and rapidly adjusting the current intensity during the refrigeration cycle according to the magnitude and range of the humidity difference △ RHTherefore, the fresh air infiltration speed is adjusted, the duration time of the negative pressure of the operation time of the freezing chamber is fully utilized, and the refrigerating humidity of the refrigerating chamber is adjusted in a wider range and the precision is high.

Description

Moisturizing air-cooled refrigerator and control method thereof
Technical Field
The invention belongs to the technical field of moisturizing refrigerators, and particularly relates to a moisturizing air-cooled refrigerator and a control method thereof.
Background
Air-cooled refrigerators become the mainstream of the market, and the existing air-cooled refrigerators are divided into two types from a refrigeration system; one is a single-cycle refrigeration system and a multi-system refrigeration system, and the main difference is whether the refrigerating chamber is provided with an independent evaporator or not. The single-system air-cooled refrigerator without an evaporator in the refrigerating chamber is popular with consumers due to high cost performance. However, the single-system air-cooled refrigerator has the biggest defect that the relative humidity in the refrigerating chamber is too low and the average humidity is between 20 and 30 percent under the no-load condition compared with the double-system air-cooled refrigerator due to the refrigeration air circulation characteristic. The preservation of various food materials has different requirements on relative humidity, for example, the relative humidity of dry goods and tea leaves is required to be less than 45%, the relative humidity of cosmetics and medicines is required to be 50-60%, and the relative humidity of fruits and vegetables is required to be more than 80%. The relative humidity directly influences the quality of the food material fresh-keeping effect. The current situation in the industry is that the relative humidity of a single-system air-cooled refrigerator is too low, the humidity control means is limited, the humidity cannot be adjusted or the humidity control cost is too high.
In the prior art, in order to increase the humidity of the refrigerating chamber of the single-circulation air-cooled refrigerator, a humidifying device is generally arranged in the refrigerating chamber of the refrigerator to achieve the aim of humidity control. As in the prior patents: the refrigerator and the humidity control method (patent number: CN105605872A) thereof, the humidity is preserved and/or humidified by adding a controlled humidifying device, the target humidity and the actual relative humidity are set, and the target water supplementing quality W is obtained according to the difference between the target humidity and the actual relative humidity and the current temperature of a target space; and measuring and calculating the water replenishing time T, and adjusting the humidity control device to maintain the maximum humidification rate Vmax within the time T so as to achieve the aim of humidification. And then adjusting the humidity control device to make the humidification rate of the humidity control device consistent with the water vapor loss rate of the target space, thereby achieving the purpose of moisturizing. The need of regularly and continuously adding additional water sources into the humidifying device is inconvenient to use and difficult to realize.
The application provides a moisturizing air-cooled refrigerator and control method thereof, according to the size and the range of humidity difference △ RH, the current intensity during the refrigeration cycle is rapidly adjusted, so that the fresh air infiltration speed is adjusted, the time that the negative pressure lasts during the operation time of a freezing chamber is fully utilized, and the humidification process of a refrigerating chamber is completed within the time.
Disclosure of Invention
Objects of the inventionThe method comprises continuously detecting average relative humidity RHAv of refrigerating chamber in previous refrigerating cycleiAnd rapidly adjusting the current intensity in the refrigeration cycle according to the size and the range of the humidity difference value △ RH, so as to adjust the fresh air infiltration speed, fully utilize the duration time of the negative pressure of the operation time of the freezing chamber, complete the humidification process of the refrigerating chamber in the time and improve the humidification efficiency of the refrigerating chamber.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a moisture-preserving air-cooled refrigerator, which comprises a refrigerator body; the box body is divided into at least one refrigerating chamber and at least one freezing chamber; a freezing air duct is arranged on the back of the inner side of the freezing compartment; a freezing fan is arranged on one side of the freezing air duct; the freezing air duct is communicated with the refrigerating chamber air supply air duct; the evaporator is arranged at the bottom of the freezing air duct; a compressor is arranged at the bottom of the back of the freezing chamber;
an electric air door is arranged at the joint of the freezing air duct and the refrigerating chamber air supply air duct; a temperature and humidity sensor is arranged on the inner side wall of the refrigerating chamber; a freezing chamber sensor is arranged on the inner side wall of the freezing chamber;
a heat-preservation sealing system is arranged between the refrigerating chamber and the refrigerating door body; the heat-preservation sealing system comprises a refrigeration door body, a box body side plate, a refrigerator liner, a winding coil assembly and a refrigeration door seal; the winding coil assembly comprises a lead, a magnetic core and a connecting piece; the connecting piece is of a rectangular annular structure; magnetic cores are installed in the installation grooves formed in the uniformly distributed connecting pieces in a matching mode; the conducting wire is wound around the periphery of the magnetic core to form a conducting wire coil; the coil winding assembly is embedded into the periphery of the inner liner of the refrigerator to form a closed complete magnetic field;
the cold storage door seal is embedded and installed along the edge of the periphery of one side face of the cold storage door body; a door seal magnetic strip is arranged on one side surface of the refrigeration door seal; the refrigeration door seal corresponds to a coil winding assembly on the refrigerator liner; the coil winding assembly is contacted with the door seal magnetic strip for adsorption; the lead is connected with the refrigerator main control unit; the refrigerator main control unit is also electrically connected with the temperature and humidity sensor and the freezing chamber sensor respectively.
Preferably, the door seal magnetic strip is a permanent magnet; the adsorption weight of the door seal magnetic stripe is less than or equal to 15g/cm2。
A control method of a moisture-preserving air-cooled refrigerator comprises the following processes:
s00: initial current I of lead for electrifying refrigerator and supplying coil winding assemblyi(ii) a Wherein, the initial value of i is 0;
s01: when any compartment of the refrigerator requires refrigeration, judging whether the temperature Tc of the refrigerating chamber is above a refrigerating stop point Tcoff or not; if yes, go to S02: if not, go to S13;
s02: the refrigerator main control unit controls the freezing fan, the compressor and the electric air door to be in an opening state;
s03: recording instantaneous humidity RHK of refrigerating chamber every R secondsi；
S04: judging whether the temperature Tc of the refrigerating chamber is below a refrigerating stop point Tcoff or not; if yes, go to S05; if not, go to S02;
s05: recording the refrigerating time Tc of the current timei；
S06: the refrigerator main control unit controls the electric air door to be closed and the freezing chamber to refrigerate;
s07: during the refrigerating period of the refrigerating chamber, the instantaneous humidity RHT of the refrigerating chamber is recorded every R secondsi；
S08: judging whether the freezing chamber reaches a freezing shutdown point or not; if yes, go to S09; if not, go to S07;
s09: record the refrigerating time Td of the freezing chamberiAnd calculating the average relative humidity value RHAvi；
S10, judging the humidity difference △ RH-RHm-RHKaviNot less than 0; if yes, go to S11; if not, go to S12;
wherein Rhm is a preset relative humidity target value of the refrigerating chamber;
s11: current I to the conductor of the coil winding assemblyi+1＝IiA and executes S01;
wherein, 0 is not less than △ RH not more than 10%, a is 0.05 ampere;
10% < △ RH ≤ 20%, a ═ 0.1 ampere;
20% < △ RH, a 0.15 Ampere;
s12: judging tm is less than or equal to Tdi(ii) a If so, the wire of the coil winding assembly is held at current IiAnd performs S13; if not, executing S01; wherein tm is a preset current regulation humidification period;
s13: the compressor and the freezing fan are turned off.
Preferably, said average relative humidity value RHAviThe calculation method is as follows:
RHavi＝(∑R*RHKi+∑R*RHTi)/(Tdi+Tci)；
wherein, the value range of R is as follows: r is more than or equal to 1s and less than or equal to 300 s; preferably, the tm preset current adjustment period takes 60 minutes.
One aspect of the present invention has the following advantageous effects:
1. according to the humidity in the cold storage room detected by the temperature and humidity sensor, the main control unit of the refrigerator controls the magnitude of the current of the lead, further controls the adsorption force of the coil winding assembly and the door seal magnetic stripe, further controls the amount of hot and humid air entering the cold storage room, is convenient to adjust the humidity balance in the cold storage room, and is convenient and practical.
2. The invention utilizes the continuous detection of the average relative humidity value RHAv of the refrigerating chamber in the previous refrigerating periodiThe method comprises the steps of calculating a humidity difference value △ RH, rapidly adjusting the current intensity in a refrigeration cycle according to the size and the range of the humidity difference value △ RH, adjusting the fresh air infiltration speed, fully utilizing the duration time of negative pressure of the operation time of a freezing chamber, finishing the humidification process of the refrigerating chamber in the time, controlling the no-load average humidity of the refrigerating chamber from 20-30% to 20-90%, enabling the humidity of the refrigerating chamber of the air-cooled refrigerator to meet the storage requirements of various different food materials, storing dry goods and tea leaves (the relative humidity is less than 45%), storing cosmetics, medicines (the relative humidity is about 50%) and fruits and vegetables (the relative humidity is more than 80%), and realizing the refrigerating humidity of the refrigerating chamber in a larger rangeThe adjustment is high in precision.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a moisture-preserving air-cooled refrigerator according to the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a schematic structural diagram of a winding coil assembly in a moisture-preserving air-cooled refrigerator according to the present invention;
FIG. 4 is a schematic structural diagram of a control method of a moisture-preserving air-cooled refrigerator according to the present invention;
FIG. 5 is a table of absolute humidity versus relative humidity;
in the drawings, the components represented by the respective reference numerals are listed below:
1-freezing chamber, 11-freezing air duct, 12-freezing fan, 13-evaporator, 14-compressor, 15-freezing chamber sensor, 2-refrigerating chamber, 21-refrigerating chamber air supply duct, 22-electric air door, 23-temperature and humidity sensor, 3-refrigerating door body, 31-box body side plate, 32-refrigerator liner, 4-winding coil assembly, 41-lead, 42-magnetic core, 43-connecting piece, 5-refrigerating door seal, 51-door seal magnetic strip and 6-refrigerator main control unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "open," "upper," "middle," "length," "inner," and the like are used in an orientation or positional relationship for convenience in describing the present invention and for simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Referring to fig. 1-3, the present invention relates to a moisture-preserving air-cooled refrigerator, which comprises a refrigerator body; the box body is divided into at least one refrigerating chamber 2 and at least one freezing chamber 1; a freezing air duct 11 is arranged on the back of the inner side of the freezing chamber 1; a freezing fan 12 is arranged at one side of the freezing air duct 11; the freezing air duct 11 is communicated with the refrigerating chamber air supply air duct 21; the evaporator 13 is arranged at the bottom of the freezing air duct 11; a compressor 14 is arranged at the bottom of the back of the freezing chamber 1; an electric air door 22 is arranged at the joint of the freezing air duct 11 and the refrigerating chamber air supply air duct 21; a temperature and humidity sensor 23 is arranged on the inner side wall of the refrigerating chamber 2; a freezing chamber sensor 15 is arranged on the inner side wall of the freezing chamber 1; in actual use: since the evaporator 13 is located inside the freezer compartment 1, the freezer compartment 1 is for most of the time below-18 ℃; the temperature is far lower than the dew point temperature of the refrigerating chamber, cold air is disturbed by the freezing fan 12 and is sent into the refrigerating chamber 2 through the refrigerating chamber air supply duct 21, moisture in the refrigerating chamber 2 is quickly removed by the evaporator 13, and the average relative humidity in the refrigerating chamber 2 is only 20-30%.
For the above case: a heat-preservation sealing system is arranged between the refrigerating chamber 2 and the refrigerating door body 3; the heat preservation sealing system comprises a refrigeration door body 3, a box body side plate 31, a refrigerator liner 32, a winding coil assembly 4 and a refrigeration door seal 5; the winding coil assembly 4 includes a wire 41, a magnetic core 42, and a connecting member 43; the connecting piece 43 is a rectangular ring structure; the magnetic cores 42 are arranged in the mounting grooves uniformly distributed on the connecting pieces 43 in a matching way; the wire 41 is wound around the periphery of the magnetic core 42 to form a wire coil; the coil winding assembly 4 is embedded in the periphery of the refrigerator liner 32 to form a closed complete magnetic field;
the refrigerating door seal 5 is embedded and installed along the edge of the periphery of one side face of the refrigerating door body 3; one side surface of the refrigeration door seal 5 is provided with a door seal magnetic strip 51; coil winding on the cold storage door seal 5 and the refrigerator liner 32The component 4 corresponds; the coil winding assembly 4 is contacted with the door seal magnetic strip 51 for adsorption; the lead 41 is connected with the refrigerator main control unit 6; the refrigerator main control unit 6 is also electrically connected with the temperature and humidity sensor 23 and the freezing chamber sensor 15 respectively; specifically, the door seal magnetic stripe 51 is a permanent magnet; the absorption weight of the door seal magnetic stripe 51 is less than or equal to 15g/cm2(ii) a During the in-service use, refrigerator main control unit 6 is according to the humidity in the cold-stored room 2 that temperature and humidity sensor 23 detected, the size of control wire 41 electric current, and then control coil winding subassembly 4 and the adsorption affinity of door seal magnetic stripe 51, and the volume that further control damp and hot air got into in the cold-stored room 2 is convenient for adjust the humidity balance in the cold-stored room 2, convenient and practical.
From a thermodynamic perspective, temperature and absolute humidity determine the relative humidity level of a space. When the common single-system refrigerator operates and the refrigerating chamber refrigerates, most of absolute humidity is brought to the low-temperature evaporator through air circulation to be condensed, and after refrigeration is stopped, the relative humidity rises slowly and the highest point is low, so that the average relative humidity is too low.
As can be seen from the air conditioning theory, the absolute humidity contained in the same relative humidity varies at different temperatures. The higher the temperature, the greater the absolute humidity in the air. Relative humidity refers to the ratio of absolute humidity to the water vapor content of the saturated state of the temperature expressed as a percentage. Absolute humidity refers to how much water vapor is contained in the gas. Referring to fig. 5, it can be seen from the table of the relative humidity and absolute humidity, that the humidity control of the refrigerating chamber can be realized by only adding several grams of absolute humidity into the refrigerating chamber; assume 1m at 5 deg.C3In the environment, if the relative humidity is 70%, only 5.09g of water vapor is needed to be added into the space.
Referring to fig. 4, a method for controlling a moisture-preserving air-cooled refrigerator is provided, which includes the following steps:
s00: the initial current I is supplied to the refrigerator and to the wire 41 of the coil winding assembly 4i(ii) a Wherein, the initial value of i is 0;
s01: when any compartment of the refrigerator requires refrigeration, judging whether the temperature Tc of the refrigerating chamber is above a refrigerating stop point Tcoff or not; if yes, go to S02: if not, go to S13;
s02: the refrigerator main control unit 6 controls the freezing fan 12, the compressor 14 and the electric air door 22 to be in an opening state;
s03: recording instantaneous humidity RHK of refrigerating chamber every R secondsi；
S04: judging whether the temperature Tc of the refrigerating chamber is below a refrigerating stop point Tcoff or not; if yes, go to S05; if not, go to S02;
s05: recording the refrigerating time Tc of the current timei；
S06: the refrigerator main control unit 6 controls the electric air door 22 to be closed and the freezing compartment to refrigerate;
s07: during the refrigerating period of the refrigerating chamber, the instantaneous humidity RHT of the refrigerating chamber is recorded every R secondsi；
S08: judging whether the freezing chamber reaches a freezing shutdown point or not; if yes, go to S09; if not, go to S07;
s09: record the refrigerating time Td of the freezing chamberiAnd calculating the average relative humidity value RHAvi；
Wherein the average relative humidity value RHAviThe calculation method is as follows:
RHavi＝∑R*RHKi+∑R*RHTi/Tdi+Tci；
wherein, R value range is: r is more than or equal to 1s and less than or equal to 300 s; in this embodiment: taking for 30 s;
s10, judging the humidity difference △ RH-RHm-RHKaviNot less than 0; if yes, go to S11; if not, go to S12;
wherein Rhm is a preset relative humidity target value of the refrigerating chamber;
s11: current I to conductor 41 of coil winding assembly 4i+1＝IiA and executes S01;
wherein, 0 is not less than △ RH not more than 10%, a is 0.05 ampere;
10% < △ RH ≤ 20%, a ═ 0.1 ampere;
20% < △ RH, a 0.15 Ampere;
s12: judging tm is less than or equal to Tdi(ii) a If so, the wires 41 of the coil winding assembly 4 are securedIs maintained as a current IiAnd performs S13; if not, executing S01; wherein tm is a preset current regulation humidification period;
s13: the compressor 14 and the refrigeration fan 12 are turned off.
The invention continuously detects the average relative humidity value RHAv of the refrigerating chamberiThe method comprises the steps of calculating a humidity difference △ RH, rapidly adjusting the current intensity in a refrigeration cycle according to the size and the range of the humidity difference △ RH, adjusting the fresh air infiltration speed, fully utilizing the duration time of negative pressure of the operation time of a freezing chamber, completing the humidification process of the refrigerating chamber in the time, controlling the no-load average humidity of the refrigerating chamber from 20% to 30% to 20% to 90%, enabling the humidity of the refrigerating chamber of the air-cooled refrigerator to meet the storage requirements of various food materials, being capable of being used for storing dry goods and tea leaves (the relative humidity is less than 45%), being also capable of being used for storing cosmetics, medicines (the relative humidity is about 50%) and fruits and vegetables (the relative humidity is more than 80%), and achieving the refrigerating humidity adjustment of the refrigerating chamber in a larger range and being high in precision.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (4)

1. A moisture-preserving air-cooled refrigerator comprises a refrigerator body; the box body is divided into at least one refrigerating chamber (2) and at least one freezing chamber (1); a freezing air duct (11) is arranged on the back of the inner side of the freezing compartment (1); a freezing fan (12) is arranged on one side of the freezing air duct (11); the freezing air duct (11) is communicated with the refrigerating chamber air supply air duct (21); an evaporator (13) is arranged at the bottom of the freezing air duct (11); a compressor (14) is arranged at the bottom of the back of the freezing chamber (1); it is characterized in that the preparation method is characterized in that,
an electric air door (22) is arranged at the joint of the freezing air duct (11) and the refrigerating chamber air supply air duct (21); a temperature and humidity sensor (23) is arranged on the inner side wall of the refrigerating chamber (2); a freezing chamber sensor (15) is arranged on the inner side wall of the freezing chamber (1);
a heat-preservation sealing system is arranged between the refrigerating chamber (2) and the refrigerating door body (3); the heat-preservation sealing system comprises a refrigeration door body (3), a box body side plate (31), a refrigerator liner (32), a winding coil assembly (4) and a refrigeration door seal (5); the winding coil assembly (4) comprises a lead wire (41), a magnetic core (42) and a connecting piece (43); the connecting piece (43) is of a rectangular annular structure; magnetic cores (42) are installed in installation grooves formed in the connecting pieces (43) in an evenly distributed mode in a matching mode; the conducting wire (41) is wound on the periphery of the magnetic core (42) to form a conducting wire coil; the coil winding assembly (4) is embedded into the periphery of the refrigerator liner (32) to form a closed complete magnetic field;
the refrigerating door seal (5) is embedded and installed along the peripheral edge of one side face of the refrigerating door body (3); a door seal magnetic strip (51) is arranged on one side surface of the refrigeration door seal (5); the refrigeration door seal (5) corresponds to a coil winding assembly (4) on a refrigerator liner (32); the coil winding assembly (4) is in contact with and adsorbed by the door seal magnetic stripe (51); the lead (41) is connected with a main control unit (6) of the refrigerator; the refrigerator main control unit (6) is also electrically connected with the temperature and humidity sensor (23) and the freezing chamber sensor (15) respectively.
2. The moisture-preserving air-cooled refrigerator as claimed in claim 1, wherein the door seal magnetic stripe (51) is a permanent magnet; the adsorption weight of the door seal magnetic stripe (51) is less than or equal to 15g/cm2。
3. A control method of a moisture-preserving air-cooled refrigerator is characterized by comprising the following processes:
s00: powering up the refrigerator and applying an initial current I to the conductor (41) of the coil winding assembly (4)i(ii) a Wherein, the initial value of i is 0;
s01: when any compartment of the refrigerator requires refrigeration, judging whether the temperature Tc of the refrigerating chamber is above a refrigerating stop point Tcoff or not; if yes, go to S02: if not, go to S13;
s02: the refrigerator main control unit (6) controls the freezing fan (12), the compressor (14) and the electric air door (22) to be in an opening state;
s03: recording instantaneous humidity RHK of refrigerating chamber every R secondsi；
S04: judging whether the temperature Tc of the refrigerating chamber is below a refrigerating stop point Tcoff or not; if yes, go to S05; if not, go to S02;
s05: recording the refrigerating time Tc of the current timei；
S06: the refrigerator main control unit (6) controls the electric air door (22) to be closed and turns the freezing chamber to refrigerate;
s07: during the refrigerating period of the refrigerating chamber, the instantaneous humidity RHT of the refrigerating chamber is recorded every R secondsi；
S08: judging whether the freezing chamber reaches a freezing shutdown point or not; if yes, go to S09; if not, go to S07;
s09: record the refrigerating time Td of the freezing chamberiAnd calculating the average relative humidity value RHAvi；
S10, judging the humidity difference △ RH-RHm-RHKaviNot less than 0; if yes, go to S11; if not, go to S12;
wherein Rhm is a preset relative humidity target value of the refrigerating chamber;
s11: current I to the conductor wire (41) of the coil winding assembly (4)i+1＝IiA and executes S01;
wherein, 0 is not less than △ RH not more than 10%, a is 0.05 ampere;
10% < △ RH ≤ 20%, a ═ 0.1 ampere;
20% < △ RH, a 0.15 Ampere;
s12: judging tm is less than or equal to Tdi(ii) a If so, the wire (41) of the coil winding assembly (4) is held at a current IiAnd performs S13; if not, executing S01; wherein tm is a preset current regulation humidification period;
s13: the compressor (14) and the refrigeration fan (12) are turned off.
4. The method as claimed in claim 3, wherein the average RH value RHAv is set to a value of RHAviThe calculation method is as follows:
RHavi＝(∑R*RHKi+∑R*RHTi)/(Tdi+Tci)；
wherein, the value range of R is as follows: r is more than or equal to 1s and less than or equal to 300 s.
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CN114719492A (en) * 2021-01-05 2022-07-08 海信容声(广东)冷柜有限公司 Refrigerator
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CN103557667A (en) * 2013-11-12 2014-02-05 合肥美的电冰箱有限公司 Electromagnetic door seal
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