CN112268401A - Refrigerator and defrosting control method thereof - Google Patents
Refrigerator and defrosting control method thereof Download PDFInfo
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- CN112268401A CN112268401A CN202010963585.2A CN202010963585A CN112268401A CN 112268401 A CN112268401 A CN 112268401A CN 202010963585 A CN202010963585 A CN 202010963585A CN 112268401 A CN112268401 A CN 112268401A
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/004—Control mechanisms
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
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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
- F25D29/00—Arrangement or mounting of control or safety devices
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- Defrosting Systems (AREA)
Abstract
The invention relates to a refrigerator, wherein a freezing air duct heating wire is arranged in the refrigerator. The invention also relates to a defrosting control method of the refrigerator, which comprises the following steps: setting and recording a refrigerating chamber gear tic of the refrigerator, and setting and recording a freezing chamber gear tld of the refrigerator; detecting and recording an ambient temperature thj outside the refrigerator; recording the accumulated starting time Ti of a compressor of the refrigerator and the door opening and closing times Ni of the refrigerator, and judging whether the refrigeration mode is converted into the defrosting mode according to the temperature area of the environment temperature thj, the value of Ti and the value of Ni; after the refrigerator is converted into a defrosting mode, simultaneously starting a defrosting heater and a freezing air duct heating wire, recording the working time Ths of the defrosting heater and the working time T6 of the freezing air duct heating wire; judging whether the heating wire of the freezing air duct is closed or not according to the value of T6 and the value of Thi; and judging whether the defrosting heater is turned off or not according to the numerical value Ths and the numerical value Thi.
Description
Technical Field
The invention relates to a refrigerator control technology, in particular to a refrigerator and a defrosting control method of the refrigerator.
Background
At present, a refrigerator generally determines whether to enter a defrosting mode according to the running time and the power-on time of a compressor, a defrosting heater is started after the refrigerator enters the defrosting mode, and the refrigerator exits the defrosting mode when the working time of the defrosting heater reaches a preset time value or a defrosting temperature sensor detects that the ambient temperature in the refrigerator is higher than a preset temperature.
The technical problems in the process are as follows: 1. the temperature detected by a defrosting temperature sensor arranged in the refrigerator is the temperature of the position of the defrosting temperature sensor, and the temperature value cannot completely represent the ambient temperature in the refrigerator, so that the temperature detected by the defrosting temperature sensor is not accurate, the defrosting in the refrigerator is not clean, or a defrosting heater still works when the defrosting in the refrigerator is finished; 2. the refrigerator is at long-term operation in-process, and freezing phenomenon can appear in cold and hot alternation in freezing wind channel and air door department, nevertheless changes the frost heater and generally arranges in the bottom of refrigerator, only depends on the radiant heat of change frost heater can't in time discharge the incomplete ice in wind channel and air door clean, and the long-time accumulation of incomplete ice can lead to air door, fan card to die, leads to the refrigerator not refrigerated condition to appear.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an object of the present invention is to provide a refrigerator.
Another object of the present invention is to provide a defrosting control method of a refrigerator.
In view of this, the invention provides a refrigerator, which is added with a freezing air duct heating wire compared with the existing refrigerator. The freezing air duct heating wires comprise fan defrosting heating wires and air door defrosting heating wires. The fan defrosting heating wire is semi-surrounded on the outer side of the freezing fan, and the heating part of the air door defrosting heating wire is arranged in the freezing and refrigerating air door.
When the refrigerator is in a refrigeration mode, a compressor is started, a freezing air channel heating wire and a defrosting heater are closed, a freezing and refrigerating air door is opened, and a freezing fan is started; after the refrigerator is switched from a cold mode to a defrosting mode, the compressor is stopped, the freezing air duct heating wire and the defrosting heater are started, the freezing and refrigerating air door is closed, and the freezing fan stops running. Compared with the existing refrigerator, the refrigerator has the advantages that the freezing air channel heating wire is arranged, residual ice in the air channel and the air door is melted and timely discharged completely through the radiation heat of the freezing air channel heating wire in the defrosting mode, the technical problem that the air door and the fan are blocked to cause the refrigerator not to refrigerate due to the fact that the residual ice is accumulated for a long time is solved, and the stability of the refrigerator is improved.
The invention provides a defrosting control method suitable for the refrigerator, which comprises the following steps:
setting and recording a refrigerating chamber gear tic of the refrigerator, setting and recording a freezing chamber gear tld of the refrigerator, and enabling the refrigerator to be in a refrigerating mode at the moment;
detecting and recording an ambient temperature thj outside the refrigerator;
setting at least five continuous temperature areas from high temperature to low temperature, wherein the environment temperature thj is in one temperature area, recording the accumulated starting time Ti of a compressor of the refrigerator and the door opening and closing times Ni of the refrigerator, and judging whether the refrigeration mode is converted into the defrosting mode according to the temperature area where the environment temperature thj is located, the value of Ti and the value of Ni;
after the refrigerator is converted from a refrigeration mode to a defrosting mode, simultaneously starting a defrosting heater and a freezing air duct heating wire, recording the working time Ths of the defrosting heater and the working time T6 of the freezing air duct heating wire;
judging whether to close the heating wire of the freezing air duct according to the numerical value of T6 and the numerical value of time Thi required by the refrigerator to theoretically complete defrosting;
after the heating wire of the freezing air duct is closed, judging whether the defrosting heater is closed or not according to the numerical value of Ths and the numerical value of time Thi required by the refrigerator to theoretically finish defrosting;
after the defrosting heater is turned off, the refrigerator is switched from a defrosting mode to a refrigerating mode;
and repeating the steps to realize automatic switching between the defrosting mode and the refrigerating mode.
In the technical scheme, the value of the influence value Yi of the frosting factor at the moment can be calculated according to the temperature area of the environment temperature thj, the value of Ti and the value of Ni, wherein Yi = ai Ti + bi Ni + ci, and then the value of Yi is compared with the value of the influence value Y of the critical frosting factor: if Y is less than or equal to Yi, the refrigerator is switched from a refrigeration mode to a defrosting mode; if Y is less than Yi, the refrigerator maintains the refrigeration mode.
The value of the critical frosting factor influence value Y is calibrated by adopting the following method: the refrigerator refrigerates under the condition of not opening a door in the environment of 25 ℃ and normal pressure, the existing refrigerator defrosting technical scheme is adopted to trigger the refrigerator to enter a defrosting mode, the accumulated starting time of the compressor when the refrigeration mode is converted into the defrosting mode is recorded, and the accumulated starting time of the compressor is the numerical value of the critical frosting factor influence value Y. The critical frost factor influence value Y is influenced by three values of the internal volume of the refrigerator, the refrigerating compartment gear tic of the refrigerator and the freezing compartment gear tld of the refrigerator.
The values of ai, bi and ci will now be explained: ai is an accumulated coefficient of the accumulated starting time Ti of the compressor, bi is an accumulated coefficient of the door opening and closing times Ni of the refrigerator, and ci is a correction coefficient. ai. The values of bi and ci are affected by the temperature region in which the internal volume of the refrigerator and the ambient temperature thj outside the refrigerator are located. The reason for introducing ai, bi and ci in the defrosting control method of the refrigerator provided by the invention is as follows: the refrigerator needs to be opened and closed in the using process, the door opening and closing process can affect the ambient temperature thj in the refrigerator, the ambient temperature thj of the refrigerator in the actual using process is deviated from 25 ℃, and the critical frosting factor influence value Y is a value measured under the conditions that the ambient temperature is 25 ℃ and the refrigerator is not opened, so that in the actual using process of the refrigerator, the condition that the value of Ti is smaller than the value of Y but the actual accumulated working time of the compressor (the accumulated starting time of the compressor in the invention comprises the accumulated working time of the compressor and the accumulated rest time of the compressor) is larger than or equal to the corresponding accumulated working time of the compressor in the value of Y exists, and at the moment, the refrigerator is converted from a refrigeration mode to a defrosting mode. Compared with the prior art, the defrosting control method of the refrigerator provided by the invention is more suitable for the actual use condition of the refrigerator, and can more accurately control the refrigerator to be converted from the refrigeration mode to the defrosting mode.
In one embodiment, the volume of the inside of the refrigerator is 500L, five consecutive temperature regions are set from high temperature to low temperature, a temperature region of 10 ℃ or less is defined as a first temperature region, a temperature region of 10 ℃ or more and 20 ℃ or less is defined as a second temperature region, a temperature region of 20 ℃ or more and 30 ℃ or less is defined as a third temperature region, a temperature region of 30 ℃ or more and 40 ℃ or less is defined as a fourth temperature region, and a temperature region of 40 ℃ or more is defined as a fifth temperature region. For ease of distinction, ai, bi, and ci located in the first temperature region are labeled a1, b1, and c1, respectively, ai, bi, and ci located in the second temperature region are labeled a2, b2, and c2, respectively, ai, bi, and ci located in the third temperature region are labeled a3, b3, and c3, respectively, ai, bi, and ci located in the fourth temperature region are labeled a4, b4, and c4, respectively, and ai, bi, and ci located in the fifth temperature region are labeled a5, b5, and c5, respectively. In the first temperature region, a1=0.90, b1=0.05, c1= 1.5; in the second temperature region, a2=0.98, b2=0.08, c2= 1.75; in the third temperature region, a3=1.07, b3=0.10, c3= 2.0; in the fourth temperature region, a4=1.14, b4=0.13, c4= 2.25; in the fifth temperature region, a5=1.25, b5=0.17, c5= 2.5. For example, when the ambient temperature thj outside the refrigerator is decreased from the fifth temperature region to the fourth temperature region, the cumulative on-time Ti of the compressor of the refrigerator and the number Ni of times of opening and closing the door of the refrigerator are recorded, the values of ai, bi and ci are a4, b4 and c4, the influence value Yi = a4Ti + b4Ni + c4 of the frosting factor is calculated, and the value Yi is compared with Y to judge whether the refrigeration mode is converted into the frosting mode.
In the technical scheme, when the ambient temperature thj moves from one temperature area to an adjacent temperature area, ai, bi and ci calculate the influence value Yi of the frosting factor by using the values of ai, bi and ci corresponding to the moved temperature area, and compare the value Yi with Y to judge whether the refrigeration mode is converted into the defrosting mode.
In the technical scheme, after the refrigeration mode of the refrigerator is converted into the defrosting mode, the compressor is stopped, the freezing and refrigerating air doors are closed, the freezing fan stops running, and the freezing air duct heating wire is simultaneously opened when the defrosting heater is opened. And simultaneously recording the working time T6 of the heating wire of the freezing air duct and the working time Ths of the defrosting heater.
In one embodiment, the value of T6 and the value of the time Thsi required by the refrigerator to theoretically complete defrosting are calculated at fixed intervals (such as 1 min), and if T6 is more than or equal to Thsi-Td, the heating wire of the freezing air duct is closed; if T6 is less than Thi-Td, the heating wire of the freezing air duct is in a continuous working state. After the air duct is frozen and the heating wire is heated, calculating the numerical value of Ths and the numerical value of Thsi which is the time required by the refrigerator to theoretically finish defrosting at fixed time intervals (such as 1 min), if Ths is more than or equal to Thsi, closing the defrosting heater, and converting the refrigerator from a defrosting mode to a refrigerating mode; if Ths is less than Thsi, the defrosting heater is in a continuous working state, and the refrigerator keeps a defrosting mode.
In one embodiment, the working time T6 of the heating wire of the freezing air duct and the working time Ths of the defrosting heater are continuously recorded, the heating wire of the freezing air duct is closed until the value of T6 is equal to the value of (Thi-Td), the defrosting heater is closed until the value of Ths is equal to the value of Thi, and the refrigerator is switched from the defrosting mode to the refrigerating mode.
In the technical scheme, the time Thsi = ATi + Btlc + Ctld + D required by the refrigerator to theoretically complete defrosting is provided, wherein A is an accumulated coefficient of accumulated starting time of a compressor when the refrigerator is in a refrigeration mode, B is an accumulated coefficient of set temperature of a refrigerating chamber of the refrigerator, C is an accumulated coefficient of set temperature of a freezing chamber of the refrigerator, and D is a correction coefficient corresponding to defrosting time length.
The values of B, C and D were calibrated as follows: in an environment of 25 ℃ and normal pressure of the refrigerator, the refrigerator is switched from a refrigeration mode to a defrosting mode under the condition of not opening a door, defrosting is carried out by adopting the existing refrigerator defrosting technical scheme until the interior of the refrigerator is completely defrosted, the time required for completely defrosting under the conditions of different refrigerator volumes, different compressor accumulated starting time, different refrigerating chamber gears tlc and different freezing chamber gears tld is recorded, and experience values A, B, C and D are obtained according to experimental data.
In one embodiment, the volume inside the refrigerator is 500L, the ambient temperature is 25 ℃, the refrigeration set temperature is 5 ℃, and the freezing set temperature is-20 ℃, where a =0.7, B =1.15, C = -0.5, and D = 8.
In the technical solution, the reason for introducing the correction value Td is to ensure that the operation time of the freezing air duct heating wire is shorter than the operation time of the defrosting heater, so that the freezing air duct heating wire is ended in advance before the defrosting heater is turned off. The effect of freezing wind channel heater strip when changing the frost mode is that the residual ice of wind channel and air door melts and in time discharges cleanly, therefore the operating time that freezing wind channel heater strip actually needs is less than the operating time of change white heater, lets the work finish time of freezing wind channel heater strip be less than the operating time of change white heater through introducing this modified value of Td, and the energy can be saved also more accords with the actual in service behavior of refrigerator. The value of Td is influenced by the capacity of the refrigerator, specifically, when the capacity of the refrigerator is 300-500L, the value of Td is 5-10 min; when the capacity of the refrigerator is less than 300L, the value of Td is less than 5 min.
The invention provides a defrosting control method of a refrigerator, the refrigerator using the defrosting control method can cancel the use of a defrosting temperature sensor, avoid the overlong or overlong short working time of a defrosting heater caused by the detection deviation of the defrosting sensor, save the use of the defrosting temperature sensor and save the cost;
compared with the prior art, the defrosting control method of the refrigerator has the technical effects that:
1. the refrigerator frosting influence parameters are researched, the accumulated starting time Ti and the door opening times Ni of the compressor of the refrigerator under different environmental temperatures thj are analyzed, and the influence coefficient values of the different influence parameters on the refrigerator frosting are given, so that the judgment condition for converting the refrigeration mode into the defrosting mode of the refrigerator is more accurate and more accords with the actual use condition of the refrigerator;
2. after the refrigerator enters a defrosting mode, whether defrosting is finished or not is judged according to the working time T6 of the freezing air duct heating wire and the working time Ths of the defrosting heater, a defrosting temperature sensor is not needed, product cost is saved, and meanwhile, the working time of the defrosting heater is prevented from being too long or too short.
Drawings
The figures further illustrate the invention, but the examples in the figures do not constitute any limitation of the invention.
Fig. 1 is a front view of an internal structure of a refrigerator provided in embodiment 1 of the present invention.
Fig. 2 is a left side view of the internal structure of the refrigerator provided in embodiment 1 of the present invention.
Fig. 3 is a flowchart of a defrosting control method for a refrigerator according to embodiment 2 of the present invention.
Wherein the reference numerals are: 1. an evaporator; 2. a defrosting heater; 3. a freezing fan; 4. a fan defrosting heating wire; 5. freezing and refrigeration dampers; 6. the fan defrosting heater strip.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
Example 1
As shown in fig. 1-2, the present embodiment provides a refrigerator including: the device comprises an evaporator 1, a defrosting heater 2, a freezing fan 3, a fan defrosting heating wire 4, a freezing and refrigerating air door 5 and a fan defrosting heating wire 6. Compare in current refrigerator and increased freezing wind channel heater strip, freezing wind channel heater strip includes fan defrosting heater strip 4 and air door defrosting heater strip 6. The fan defrosting heating wire 4 is semi-surrounded on the outer side of the freezing fan 3, and the heating part of the air door defrosting heating wire 6 is arranged in the freezing and refrigerating air door 5.
When the refrigerator is in a refrigeration mode, a compressor is started, a freezing air channel heating wire and a defrosting heater 2 are closed, a freezing and refrigerating air door 5 is opened, and a freezing fan 3 is started; after the refrigerator is switched from the cold mode to the defrosting mode, the compressor is stopped, the freezing air channel heating wire and the defrosting heater 2 are started, the freezing and refrigerating air door 5 is closed, and the freezing fan 3 stops running. Compared with the existing refrigerator, the refrigerator has the advantages that the freezing air channel heating wire is arranged, when in a defrosting mode, residual ice on the freezing fan 3 and the freezing and refrigerating air door 5 is melted and timely discharged completely through the radiation heat of the freezing air channel heating wire, and the freezing air channel heating wire is reasonably arranged in the refrigerator, so that the operation reliability of the refrigerator is improved.
Example 2
The present embodiment provides a defrosting control method for a refrigerator, where an internal volume of the refrigerator described in the present embodiment is 500L, an internal structure of the refrigerator is consistent with that of the refrigerator provided in embodiment 1, and a flow of the defrosting control method is as shown in fig. 2, and includes:
s1, setting and recording a refrigerating chamber gear tic of the refrigerator, setting and recording a freezing chamber gear tld of the refrigerator, wherein the refrigerator is in a refrigerating mode;
s2, detecting and recording an ambient temperature thj outside the refrigerator, setting five consecutive temperature regions from high temperature to low temperature, setting a temperature region of 10 ℃ or less as a first temperature region, setting a temperature region of 10 ℃ or more and 20 ℃ or less as a second temperature region, setting a temperature region of 20 ℃ or more and 30 ℃ or less as a third temperature region, setting a temperature region of 30 ℃ or more and 40 ℃ or less as a fourth temperature region, setting a temperature region of 40 ℃ or more as a fifth temperature region, within the first temperature region, a1=0.90, b1=0.05, c1= 1.5; in the second temperature region, a2=0.98, b2=0.08, c2= 1.75; in the third temperature region, a3=1.07, b3=0.10, c3= 2.0; in the fourth temperature region, a4=1.14, b4=0.13, c4= 2.25; in the fifth temperature region, a5=1.25, b5=0.17, c5= 2.5;
s3, recording the accumulated starting time Ti of a compressor of the refrigerator and the door opening and closing times Ni of the refrigerator, calculating a frosting factor influence value Yi = ai Ti + bi Ni + ci according to the temperature area of the external environment temperature thj, comparing the numerical value of Yi with the numerical value of a critical frosting factor influence value Y, and if Y is less than or equal to Yi, converting the refrigerator from a refrigeration mode to a defrosting mode; if Y is less than Yi, the refrigerator maintains the refrigeration mode;
s4, after the refrigerator is converted into a defrosting mode from a refrigerating mode, simultaneously starting the defrosting heater 2 and the freezing air duct heating wire, recording the working time Ths of the defrosting heater and the working time T6 of the freezing air duct heating wire;
s5, continuously recording the working time T6 of the heating wire of the freezing air duct and the working time Ths of the defrosting heater, closing the heating wire of the freezing air duct until the numerical value T6 is equal to the numerical value (Thi-Td), and closing the defrosting heater until the numerical value Ths is equal to the numerical value Thi, wherein the defrosting heater is switched off, and the refrigerator is converted into a refrigerating mode from a defrosting mode; thsi = ATi + Btlc + Ctld + D, in this example, ambient temperature thj was 25 ℃, refrigeration set temperature tlc was 5 ℃, and freezing set temperature tld was-20 ℃, at which time a =0.7, B =1.15, C = -0.5, D = 8; td =10min in this embodiment.
Example 3
The present embodiment provides a defrosting control method for a refrigerator, where an internal volume of the refrigerator described in the present embodiment is 400L, an internal structure of the refrigerator is consistent with that of the refrigerator provided in embodiment 1, and the defrosting control method includes:
s1, setting and recording a refrigerating chamber gear tic of the refrigerator, setting and recording a freezing chamber gear tld of the refrigerator, wherein the refrigerator is in a refrigerating mode;
s2, detecting and recording an ambient temperature thj outside the refrigerator, setting five consecutive temperature regions from high temperature to low temperature, setting a temperature region of 10 ℃ or less as a first temperature region, setting a temperature region of 10 ℃ or more and 20 ℃ or less as a second temperature region, setting a temperature region of 20 ℃ or more and 30 ℃ or less as a third temperature region, setting a temperature region of 30 ℃ or more and 40 ℃ or less as a fourth temperature region, setting a temperature region of 40 ℃ or more as a fifth temperature region, within the first temperature region, a1=0.86, b1=0.05, c1= 1.3; in the second temperature region, a2=0.95, b2=0.08, c2= 1.45; in the third temperature region, a3=1.1, b3=0.10, c3= 1.85; in the fourth temperature region, a4=1.2, b4=0.13, c4= 2.15; in the fifth temperature region, a5=1.5, b5=0.17, c5= 2.35;
s3, recording the accumulated starting time Ti of a compressor of the refrigerator and the door opening and closing times Ni of the refrigerator, calculating a frosting factor influence value Yi = ai Ti + bi Ni + ci according to the temperature area of the external environment temperature thj, comparing the numerical value of Yi with the numerical value of a critical frosting factor influence value Y, and if Y is less than or equal to Yi, converting the refrigerator from a refrigeration mode to a defrosting mode; if Y is less than Yi, the refrigerator maintains the refrigeration mode;
s4, after the refrigerator is converted into a defrosting mode from a refrigerating mode, simultaneously starting the defrosting heater 2 and the freezing air duct heating wire, recording the working time Ths of the defrosting heater and the working time T6 of the freezing air duct heating wire;
s5, continuously recording the working time T6 of the heating wire of the freezing air duct and the working time Ths of the defrosting heater, closing the heating wire of the freezing air duct until the numerical value T6 is equal to the numerical value (Thi-Td), and closing the defrosting heater until the numerical value Ths is equal to the numerical value Thi, wherein the defrosting heater is switched off, and the refrigerator is converted into a refrigerating mode from a defrosting mode; thsi = ATi + Btlc + Ctld + D, in this example, ambient temperature thj was 25 ℃, refrigeration set temperature tlc was 5 ℃, and freezing set temperature tld was-20 ℃, at which time a =0.68, B =1.20, C = -0.6, D = 6; td =8min in this embodiment.
Example 4
The present embodiment provides a defrosting control method for a refrigerator, where an internal volume of the refrigerator described in the present embodiment is 300L, an internal structure of the refrigerator is consistent with that of the refrigerator provided in embodiment 1, and the defrosting control method includes:
s1, setting and recording a refrigerating chamber gear tic of the refrigerator, setting and recording a freezing chamber gear tld of the refrigerator, wherein the refrigerator is in a refrigerating mode;
s2, detecting and recording an ambient temperature thj outside the refrigerator, setting five consecutive temperature regions from high temperature to low temperature, setting a temperature region of 10 ℃ or less as a first temperature region, setting a temperature region of 10 ℃ or more and 20 ℃ or less as a second temperature region, setting a temperature region of 20 ℃ or more and 30 ℃ or less as a third temperature region, setting a temperature region of 30 ℃ or more and 40 ℃ or less as a fourth temperature region, setting a temperature region of 40 ℃ or more as a fifth temperature region, within the first temperature region, a1=0.78, b1=0.03, c1= 1.25; in the second temperature region, a2=0.89, b2=0.05, c2= 1.55; in the third temperature region, a3=1.1, b3=0.07, c3= 1.7; in the fourth temperature region, a4=1.24, b4=0.10, c4= 1.85; in the fifth temperature region, a5=1.35, b5=0.13, c5= 2.1;
s3, recording the accumulated starting time Ti of a compressor of the refrigerator and the door opening and closing times Ni of the refrigerator, calculating a frosting factor influence value Yi = ai Ti + bi Ni + ci according to the temperature area of the external environment temperature thj, comparing the numerical value of Yi with the numerical value of a critical frosting factor influence value Y, and if Y is less than or equal to Yi, converting the refrigerator from a refrigeration mode to a defrosting mode; if Y is less than Yi, the refrigerator maintains the refrigeration mode;
s4, after the refrigerator is converted into a defrosting mode from a refrigerating mode, simultaneously starting the defrosting heater 2 and the freezing air duct heating wire, recording the working time Ths of the defrosting heater and the working time T6 of the freezing air duct heating wire;
s5, continuously recording the working time T6 of the heating wire of the freezing air duct and the working time Ths of the defrosting heater, closing the heating wire of the freezing air duct until the numerical value T6 is equal to the numerical value (Thi-Td), and closing the defrosting heater until the numerical value Ths is equal to the numerical value Thi, wherein the defrosting heater is switched off, and the refrigerator is converted into a refrigerating mode from a defrosting mode; thsi = ATi + Btlc + Ctld + D, in this example, ambient temperature thj was 25 ℃, refrigeration set temperature tlc was 5 ℃, and freezing set temperature tld was-20 ℃, at which time a =0.54, B =1.25, C = -0.7, D = 4; td =5min in this embodiment.
Example 5
The present embodiment provides a defrosting control method for a refrigerator, where an internal volume of the refrigerator described in the present embodiment is 200L, an internal structure of the refrigerator is consistent with that of the refrigerator provided in embodiment 1, and the defrosting control method includes:
s1, setting and recording a refrigerating chamber gear tic of the refrigerator, setting and recording a freezing chamber gear tld of the refrigerator, wherein the refrigerator is in a refrigerating mode;
s2, detecting and recording an ambient temperature thj outside the refrigerator, setting five consecutive temperature regions from a high temperature to a low temperature, setting a temperature region of 10 ℃ or less as a first temperature region, a temperature region of 10 ℃ or more and 20 ℃ or less as a second temperature region, a temperature region of 20 ℃ or more and 30 ℃ or less as a third temperature region, a temperature region of 30 ℃ or more and 40 ℃ or less as a fourth temperature region, a temperature region of 40 ℃ or more as a fifth temperature region, within the first temperature region, a1=0.65, b1=0.03, c1= 1.2; in the second temperature region, a2=0.79, b2=0.05, c2= 1.6; in the third temperature region, a3=1.05, b3=0.07, c3= 1.8; in the fourth temperature region, a4=1.32, b4=0.10, c4= 2.0; in the fifth temperature region, a5=1.45, b5=0.13, c5= 2.2;
s3, recording the accumulated starting time Ti of a compressor of the refrigerator and the door opening and closing times Ni of the refrigerator, calculating a frosting factor influence value Yi = ai Ti + bi Ni + ci according to the temperature area of the external environment temperature thj, comparing the numerical value of Yi with the numerical value of a critical frosting factor influence value Y, and if Y is less than or equal to Yi, converting the refrigerator from a refrigeration mode to a defrosting mode; if Y is less than Yi, the refrigerator maintains the refrigeration mode;
s4, after the refrigerator is converted into a defrosting mode from a refrigerating mode, simultaneously starting the defrosting heater 2 and the freezing air duct heating wire, recording the working time Ths of the defrosting heater and the working time T6 of the freezing air duct heating wire;
s5, continuously recording the working time T6 of the heating wire of the freezing air duct and the working time Ths of the defrosting heater, closing the heating wire of the freezing air duct until the numerical value T6 is equal to the numerical value (Thi-Td), and closing the defrosting heater until the numerical value Ths is equal to the numerical value Thi, wherein the defrosting heater is switched off, and the refrigerator is converted into a refrigerating mode from a defrosting mode; thsi = ATi + Btlc + Ctld + D, in this example, ambient temperature thj was 25 ℃, refrigeration set temperature tlc was 5 ℃, and freezing set temperature tld was-20 ℃, at which time a =0.46, B =1.35, C = -0.8, D = 2; td =4min in this embodiment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A defrosting control method of a refrigerator is characterized by comprising the following steps:
setting and recording a refrigerating chamber gear tic of a refrigerator, and setting and recording a freezing chamber gear tld of the refrigerator, wherein the refrigerator is in a refrigerating mode;
detecting and recording an ambient temperature thj outside the refrigerator;
setting at least five continuous temperature areas from high temperature to low temperature, wherein the environment temperature thj is in one temperature area, recording the accumulated starting time Ti of a compressor of the refrigerator and the door opening and closing times Ni of the refrigerator, and judging whether the refrigeration mode is converted into the defrosting mode according to the temperature area where the environment temperature thj is located, the value of Ti and the value of Ni;
after the refrigerator is switched from a refrigeration mode to a defrosting mode, simultaneously starting a defrosting heater and a freezing air channel heating wire, recording the working time Ths of the defrosting heater and the working time T6 of the freezing air channel heating wire;
judging whether the heating wire of the freezing air duct is closed or not according to the numerical value of T6 and the numerical value of time Thsi required by the refrigerator to theoretically complete defrosting;
after the heating wire of the freezing air duct is closed, judging whether the defrosting heater is closed or not according to the numerical value of Ths and the numerical value of time Thi required by the refrigerator to theoretically finish defrosting;
and after the defrosting heater is turned off, the refrigerator is switched from a defrosting mode to a refrigerating mode.
2. The defrosting control method according to claim 2, wherein a value of a frosting factor influence value Yi, Yi = aiTi + biNi + ci, calculated from a temperature region in which the ambient temperature thj is located, the value of Ti, and the value of Ni is compared with a value of a critical frosting factor influence value Y: if Y is less than or equal to Yi, the refrigerator is switched from a refrigeration mode to a defrosting mode; if Y is less than Yi, the refrigerator maintains the refrigeration mode.
3. The defrosting control method according to claim 2 wherein not five consecutive temperature zones are set from high temperature to low temperature.
4. The defrosting control method of claim 2, wherein after the refrigerator is switched from the cooling mode to the defrosting mode, whether the freezing air duct heating wire is turned off or not is periodically judged according to the value of T6, and when T6 ≧ (Thi-Td), the freezing air duct heating wire is turned off; when T6 < (Thi-Td), the heating wire of the freezing air duct keeps working.
5. The defrosting control method according to claim 4, wherein after the heating wire of the freezing air duct is closed, whether the defrosting heater is closed or not is periodically judged according to the value Ths, and if Ths is more than or equal to Thsi, the defrosting heater is closed; if Ths is less than Thsi, the defrosting heater is in a continuous working state.
6. The defrosting control method according to claim 2, wherein after the refrigerator is switched from the cooling mode to the defrosting mode, the working time T6 of the heating wire of the freezing air duct and the working time Ths of the defrosting heater are continuously recorded.
7. The defrosting control method of claim 6 wherein the freezing duct heating wire is turned off when the value of T6 is equal to the value of (Thsi-Td).
8. The defrosting control method of claim 7 wherein the defrosting heater is turned off when the value of Ths is equal to the value of Thsi.
9. A refrigerator characterized in that the refrigerator employs the defrosting control method as claimed in any one of claims 1 to 8.
10. The refrigerator according to claim 9, wherein a freezing air duct heating wire is provided inside the refrigerator, the freezing air duct heating wire comprises a fan defrosting heating wire and a damper defrosting heating wire, the fan defrosting heating wire is semi-enclosed outside the freezing fan, and a heating part of the damper defrosting heating wire is provided inside the freezing and refrigerating air duct.
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| CN113983748A (en) * | 2021-10-15 | 2022-01-28 | 创维电器股份有限公司 | Control method for stabilizing refrigerating temperature of air-cooled refrigerator after defrosting |
| CN114963658A (en) * | 2022-05-10 | 2022-08-30 | 珠海格力电器股份有限公司 | Refrigerator control method, readable storage medium and refrigerator |
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