CN111649523A - Defrosting control method and system based on air-cooled refrigerator - Google Patents
Defrosting control method and system based on air-cooled refrigerator Download PDFInfo
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- CN111649523A CN111649523A CN202010516540.0A CN202010516540A CN111649523A CN 111649523 A CN111649523 A CN 111649523A CN 202010516540 A CN202010516540 A CN 202010516540A CN 111649523 A CN111649523 A CN 111649523A
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- defrosting
- heater
- evaporator
- heating
- heating power
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
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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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- 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
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/10—Sensors measuring the temperature of the evaporator
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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)
- Defrosting Systems (AREA)
Abstract
The invention discloses a defrosting control method and system based on an air-cooled refrigerator, and relates to the technical field of refrigerator defrosting. In the defrosting stage of the evaporator, when Te is less than or equal to Ha, the heater is controlled to be heated by adopting 100 percent of heating power; when Ha is more than Te and less than or equal to Hb, controlling the heater to adopt 50 percent of heating power for heating; when Hb is more than Te and less than or equal to Hc, the heater is controlled to be heated by adopting 25 percent of heating power; and modifying the defrosting temperature threshold values Ha and Hb according to the Delta Tc after defrosting is finished. The evaporator temperature Te in the defrosting process is monitored through the evaporator temperature sensor, and the heating power of the heater is adjusted by the heater driving module according to the range of the Te; after defrosting is finished, monitoring the evaporator temperature Td after defrosting through an evaporator temperature sensor, and adjusting defrosting temperature thresholds Ha and Hb; not only ensures the cleanness and defrosting of the evaporator, but also reduces energy consumption and waste and saves energy.
Description
Technical Field
The invention belongs to the technical field of refrigerator defrosting, and particularly relates to a defrosting control method and system based on an air-cooled refrigerator.
Background
The air-cooled refrigerator is also called a frost-free refrigerator and has the working principle that: the external high-temperature air flows through the evaporator arranged in the refrigerator for heat exchange, so that the temperature of the air after heat exchange is reduced, and the cold air with the reduced temperature after heat exchange is blown into the refrigerator compartment through the air duct, thereby achieving the purpose of refrigeration. In the working process, when the moisture in the high-temperature air meets the cold evaporator, the moisture is condensed and frosted on the surface of the evaporator, and the refrigerating effect is poor easily along with the longer service time, so that the defrosting treatment is required to be carried out on the evaporator at irregular time.
In the prior art, frost on an evaporator of an air-cooled refrigerator is generally melted by arranging a steel pipe heater at the lower part of the evaporator in a heat radiation and heat conduction mode. The judgment basis of the defrosting exiting condition is a fixed threshold value, and the defrosting exiting condition cannot be flexibly changed, so that the problem of excessive defrosting is caused, and energy consumption loss exists. Therefore, how to reduce the energy consumption caused by partial defrosting is an important subject to be solved for energy conservation of the air-cooled refrigerator.
The invention provides a defrosting control method and system based on an air-cooled refrigerator, which can reduce energy consumption and energy waste in a defrosting process.
Disclosure of Invention
The invention aims to provide a defrosting control method and system based on an air-cooled refrigerator.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a defrosting control method based on an air-cooled refrigerator, which comprises the following steps:
the method comprises the following steps: entering a defrosting heating stage according to defrosting conditions;
step two: judging that Te is less than or equal to Ha; if yes, controlling the heater to adopt 100% heating power for heating and executing the step two; if not, executing the third step;
step three: judging that Ha is more than Te and is less than or equal to Hb; if yes, controlling the heater to adopt 50% heating power for heating and executing a third step; if not, executing the step four;
step four: judging whether Hb is more than Te and less than or equal to Hc; if yes, controlling the heater to adopt 25% heating power for heating and executing the step four; if not, stopping heating and executing the fifth step;
wherein Te is the collection temperature of an evaporator temperature sensor in the defrosting stage, Ha, Hb and Hc are defrosting temperature thresholds, and Ha is more than Hb and less than Hc;
step five: modifying the defrosting temperature threshold values Ha and Hb according to the Delta Tc:
Ha＝Ha-△Tc/2；Hb＝Hb-△Tc/4；
wherein Δ Tc ═ Td-Hc; the initial value of Ha is-4 ℃; hb initial value is 0 ℃; the initial value of Hc is 8 ℃; and Td is the temperature collected by the evaporator temperature sensor after defrosting is finished.
A defrosting control system based on an air-cooled refrigerator comprises an evaporator, a heater driving module and an evaporator temperature sensor;
the evaporator is arranged in a freezing chamber of the refrigerator; the heater is arranged at the bottom of the evaporator; the evaporator temperature sensor is arranged at the top of the evaporator; the heater driving module drives the heater to defrost the heating; and the heater driving module is used for controlling the heating power of the heater according to the defrosting stage temperature Te acquired by the evaporator temperature sensor.
Preferably, the heater driving module adjusts the heating power of the heater by cutting a direct-current steamed bread wave voltage.
One aspect of the present invention has the following advantageous effects:
the evaporator temperature Te in the defrosting process is monitored through the evaporator temperature sensor, and the heating power of the heater is adjusted by the heater driving module according to the range of the Te; after defrosting is finished, monitoring the evaporator temperature Td after defrosting through an evaporator temperature sensor, and adjusting defrosting temperature thresholds Ha and Hb; not only ensures the cleanness and defrosting of the evaporator, but also reduces energy consumption and waste and saves energy.
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 flow chart of a defrosting control method based on an air-cooled refrigerator according to the present invention;
fig. 2 is a schematic structural diagram of a defrosting control system based on an air-cooled refrigerator according to the present invention.
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, the present invention is a defrosting control method based on an air-cooled refrigerator, including the following steps:
the method comprises the following steps: entering a defrosting heating stage according to defrosting conditions;
step two: judging that Te is less than or equal to Ha; if yes, controlling the heater to adopt 100% heating power for heating and executing the step two; if not, executing the third step;
step three: judging that Ha is more than Te and is less than or equal to Hb; if yes, controlling the heater to adopt 50% heating power for heating and executing a third step; if not, executing the step four;
step four: judging whether Hb is more than Te and less than or equal to Hc; if yes, controlling the heater to adopt 25% heating power for heating and executing the step four; if not, stopping heating;
wherein Te is the collection temperature of an evaporator temperature sensor in the defrosting stage, Ha, Hb and Hc are defrosting temperature thresholds, and Ha is more than Hb and less than Hc;
step five: modifying the defrosting temperature threshold values Ha and Hb according to the delta Tc (at the moment, entering a dripping stage, and collecting the evaporator temperature after defrosting by an evaporator temperature sensor):
Ha＝Ha-△Tc/2；Hb＝Hb-△Tc/4；
wherein Δ Tc ═ Td-Hc; the initial value of Ha is-4 ℃; hb initial value is 0 ℃; the initial value of Hc is 8 ℃; and Td is the temperature collected by the evaporator temperature sensor after defrosting is finished.
Referring to fig. 2, a defrosting control system based on an air-cooled refrigerator includes an evaporator, a heater driving module, and an evaporator temperature sensor; the evaporator is arranged in the freezing chamber of the refrigerator; the heater is arranged at the bottom of the evaporator; the evaporator temperature sensor is arranged at the top of the evaporator; the heater driving module drives the heater to defrost the heating; the heater driving module is used for controlling the heating power of the heater according to the defrosting stage temperature Te acquired by the evaporator temperature sensor;
specifically, the heat exchange device is arranged in the refrigerator, low-temperature refrigerant flows through the evaporator, so that the surface temperature of the evaporator is reduced, and air flows through the evaporator to be cooled; the cooled air is blown to the refrigerator chamber, so that the refrigerator is cooled; because the temperature of the evaporator is low during refrigeration, the frost is easy to form; the heater is arranged below the evaporator and is in a closed state during normal refrigeration; when defrosting is started, the heater is turned on to generate heat to defrost the evaporator; the heater driving module is used for driving the heater to heat and controlling the power of the heater; the power regulating method is to cut the direct-current steamed bread wave voltage to reduce or increase the effective value of the voltage, thereby achieving the effect of regulating the power; the evaporator temperature sensor is arranged at the upper end of the evaporator, namely the place where defrosting is most difficult, and is used for collecting the temperature of the evaporator as an exit condition of a defrosting heating stage; not only ensures the cleanness and defrosting of the evaporator, but also reduces energy consumption and waste and saves energy.
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 (3)
1. A defrosting control method based on an air-cooled refrigerator is characterized by comprising the following steps:
the method comprises the following steps: entering a defrosting heating stage according to defrosting conditions;
step two: judging that Te is less than or equal to Ha; if yes, controlling the heater to adopt 100% heating power for heating and executing the step two; if not, executing the third step;
step three: judging that Ha is more than Te and is less than or equal to Hb; if yes, controlling the heater to adopt 50% heating power for heating and executing a third step; if not, executing the step four;
step four: judging whether Hb is more than Te and less than or equal to Hc; if yes, controlling the heater to adopt 25% heating power for heating and executing the step four; if not, stopping heating;
wherein Te is the collection temperature of an evaporator temperature sensor in the defrosting stage, Ha, Hb and Hc are defrosting temperature thresholds, and Ha is more than Hb and less than Hc;
step five: modifying the defrosting temperature threshold values Ha and Hb according to the Delta Tc:
Ha＝Ha-△Tc/2；Hb＝Hb-△Tc/4；
wherein Δ Tc ═ Td-Hc; the initial value of Ha is-4 ℃; hb initial value is 0 ℃; the initial value of Hc is 8 ℃; and Td is the temperature collected by the evaporator temperature sensor after defrosting is finished.
2. The defrosting control system based on the air-cooled refrigerator as claimed in claim 1, which comprises an evaporator, a heater driving module and an evaporator temperature sensor;
the evaporator is arranged in a freezing chamber of the refrigerator; the heater is arranged at the bottom of the evaporator; the evaporator temperature sensor is arranged at the top of the evaporator; the heater driving module drives the heater to defrost the heating;
and the heater driving module is used for controlling the heating power of the heater according to the defrosting stage temperature Te acquired by the evaporator temperature sensor.
3. The defrosting control system of an air-cooled refrigerator according to claim 2 wherein the heater driving module adjusts the heater heating power by cutting a direct current steamed bread wave voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010516540.0A CN111649523B (en) | 2020-06-09 | 2020-06-09 | Defrosting control method and system based on air-cooled refrigerator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010516540.0A CN111649523B (en) | 2020-06-09 | 2020-06-09 | Defrosting control method and system based on air-cooled refrigerator |
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| CN111649523A true CN111649523A (en) | 2020-09-11 |
| CN111649523B CN111649523B (en) | 2022-03-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696862A (en) * | 2020-12-18 | 2021-04-23 | 合肥朗驰工业设计有限公司 | Intermittent defrosting control method for refrigerator and air-cooled refrigerator |
| CN114165972A (en) * | 2021-12-15 | 2022-03-11 | 长虹美菱股份有限公司 | Power-on defrosting control method for air-cooled refrigerator |
| CN114237319A (en) * | 2021-11-25 | 2022-03-25 | 中城智联(成都)创新科技有限公司 | Controllable temperature rise type anti-condensation control structure |
| CN115127284A (en) * | 2022-07-07 | 2022-09-30 | 合肥美菱物联科技有限公司 | Refrigerator defrosting system and defrosting method |
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| CN106931694A (en) * | 2017-04-12 | 2017-07-07 | 广东美的暖通设备有限公司 | Method, device, heat pump and air-conditioning for defrost |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040244389A1 (en) * | 2003-06-09 | 2004-12-09 | Denvir Kerry J. | Integrated refrigeration control |
| JP2006329450A (en) * | 2005-05-23 | 2006-12-07 | Daiwa Industries Ltd | Control method of inside fan motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696862A (en) * | 2020-12-18 | 2021-04-23 | 合肥朗驰工业设计有限公司 | Intermittent defrosting control method for refrigerator and air-cooled refrigerator |
| CN114237319A (en) * | 2021-11-25 | 2022-03-25 | 中城智联(成都)创新科技有限公司 | Controllable temperature rise type anti-condensation control structure |
| CN114165972A (en) * | 2021-12-15 | 2022-03-11 | 长虹美菱股份有限公司 | Power-on defrosting control method for air-cooled refrigerator |
| CN115127284A (en) * | 2022-07-07 | 2022-09-30 | 合肥美菱物联科技有限公司 | Refrigerator defrosting system and defrosting method |
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| CN111649523B (en) | 2022-03-15 |
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