CN112696860A - Refrigerator freezing return air duct and defrosting control method thereof - Google Patents
Refrigerator freezing return air duct and defrosting control method thereof Download PDFInfo
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- CN112696860A CN112696860A CN202011502544.XA CN202011502544A CN112696860A CN 112696860 A CN112696860 A CN 112696860A CN 202011502544 A CN202011502544 A CN 202011502544A CN 112696860 A CN112696860 A CN 112696860A
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- defrosting
- air duct
- return air
- refrigerator
- control method
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- 238000010257 thawing Methods 0.000 title claims abstract description 115
- 230000008014 freezing Effects 0.000 title claims abstract description 39
- 238000007710 freezing Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
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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
- 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
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/067—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by air ducts
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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 relates to a refrigerator freezing return air duct and a defrosting control method thereof, wherein the refrigerator freezing return air duct comprises a refrigerator liner and a return air duct cover plate, a groove is integrally formed on a back plate of the refrigerator liner, and the return air duct cover plate is attached to the back plate and forms the freezing return air duct by enclosing with the groove. The invention adopts the freezing return air duct which is integrally formed, and is matched with a specific defrosting method, cancels the return air duct compensating heater on the basis of ensuring the complete defrosting in the return air duct, reduces the energy consumption of the refrigerator and the safety risk, reduces the number of return air duct components, and has simple assembly of the return air duct and high automation degree.
Description
Technical Field
The invention relates to the technical field of defrosting methods of air-cooled refrigerators, in particular to a refrigerating return air duct of a refrigerator and a defrosting control method thereof.
Background
At present, for a single-system air-cooled refrigerator, air circulation is realized between a refrigerating chamber and a freezing chamber through an air return pipeline, the existing air return pipeline is complex in structure and formed by splicing a plurality of parts, the splicing positions are required to be sealed, and the number of working procedures is large; meanwhile, in order to prevent the internal temperature of the return air pipe from being too low, a certain gap needs to be formed between the return air pipe and the freezing liner; but is limited by the thickness of the bubble layer on the back of the refrigerator, and can not be too close to the back of the refrigerator, which can cause the back to be condensed. Because the gap between the air return pipe and the freezing liner is not large, part of cold energy in the freezing chamber is inevitably transmitted to the interior of the air return pipe, the temperature of the interior of the air return pipe is low, and a large amount of water vapor contained in the refrigerated return air can frost at the position with low temperature of the air return pipe; if the frost layer can not be removed for a long time, the frost layer can freeze for a long time, the return air quantity is reduced, and further the refrigerating chamber is weak in refrigeration or even not refrigerated at all.
At present, a relatively mature defrosting mode of the return air duct is that a compensation heater is arranged on the outer surface of the return air duct, and the compensation heater is started to melt frost/ice in the return air duct when a refrigerator does not refrigerate or a freezing chamber evaporator defrosts, so that the smoothness of the inside of the return air duct is ensured. But this inevitably leads to an increase in the overall energy consumption of the refrigerator; meanwhile, the compensating heater belongs to strong electricity and has certain potential safety hazard when being placed in a foaming layer of the refrigerator.
Therefore, how to reduce the power consumption of the refrigerator and the potential safety hazard is an important direction of current research.
Disclosure of Invention
The invention aims to solve the problems of complex structure, high defrosting energy consumption and potential safety hazard of an air return duct of a refrigerator in the prior art, and provides a freezing air return duct of the refrigerator and a defrosting control method thereof.
In order to achieve the above object, the present invention provides a refrigerator freezing return air duct, which includes a refrigerator liner and a return air duct cover plate, wherein a groove is integrally formed on a back plate of the refrigerator liner, and the return air duct cover plate is attached to the back plate and encloses with the groove to form the freezing return air duct.
Under the preferable condition, a sink groove matched with the outline of the air return channel cover plate is reserved on the rear back plate.
Preferably, the connection mode of the air return duct cover plate and the rear back plate is at least one selected from adhesive connection, buckle connection, screw connection and double-sided adhesive connection.
The second aspect of the present invention provides a defrosting control method for a freezing return air duct of a refrigerator, where the defrosting control method includes:
every other preset defrosting period, comparing the accumulated working time of the compressor with a preset value by detecting the environment temperature interval of the refrigerator, and judging whether the refrigerator meets defrosting conditions;
under the condition that the refrigerator meets defrosting conditions, a refrigerator compressor is closed, the refrigerator compressor stops working, and a defrosting heater starts working;
acquiring temperature T of defrosting sensorh；
Judgment of ThWhether a preset exit temperature is reached;
at ThAcquiring the temperature Tx of an air return sensor under the condition of reaching a preset exit temperature;
when Tx is less than or equal to 0 ℃, the defrosting heater continues to work until Tx reaches 3 ℃, the defrosting heater stops working, and meanwhile the time of the next defrosting period is reduced by D1。
Under the preferable conditions, the defrosting control method comprises the following steps: when Tx is more than 0 and less than 5 ℃, the defrosting heater continues to work until Tx reaches 5 ℃ or ThTo reach T1At this time, the defrosting heater stops working, and the next defrosting cycle time is reduced by D2。
Under preferred conditions, said D2＜D1。
Under the preferable conditions, the defrosting control method comprises the following steps: when Tx is more than or equal to 5 and less than 8 ℃, frost in the air return duct is not completely melted, and the defrosting heater stops working; while the next defrost cycle time is reduced by D3。
Under preferred conditions, said D3＜D2。
Under the preferable conditions, the defrosting control method comprises the following steps: when Tx is more than or equal to 8 ℃, frost in the air return duct is completely melted, and the defrosting heater stops working; and the defrosting control logic of the next defrosting period is kept unchanged.
Through the technical scheme, the freezing return air duct which is integrally formed is matched with a specific defrosting method, a return air duct compensation heater is omitted on the basis of ensuring complete defrosting in the return air duct, the energy consumption of the refrigerator is reduced, the safety risk is reduced, the number of return air duct sub-parts is reduced, the return air duct is simple to assemble, and the automation degree is high.
Drawings
Fig. 1 is a schematic structural view of a freezing return air duct of a refrigerator according to an embodiment of the present invention;
FIG. 2 is a schematic assembled structure of a freezing return air duct of a refrigerator according to an embodiment of the present invention;
fig. 3 is a flowchart of a defrosting control method of a freezing return air duct of a refrigerator according to an embodiment of the present invention.
Description of the reference numerals
1 refrigerator liner 9 return air duct cover plate
10 back plate 11 sink
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a schematic structural view of a freezing return air duct of a refrigerator according to an embodiment of the present invention; FIG. 2 is a schematic assembled structure of a freezing return air duct of a refrigerator according to an embodiment of the present invention; as shown in fig. 1-2, in one aspect, the present invention provides a refrigerator freezing return air duct, which includes a refrigerator liner 1 and a return air duct cover plate 9, wherein a back plate 10 of the refrigerator liner 1 is integrally formed with a groove, and the return air duct cover plate is attached to the back plate and encloses with the groove to form the freezing return air duct.
In the invention, the rear back plate 10 of the refrigerator liner 1 is matched with the air return channel cover plate 9 to form the air return cavity, so that the number of air return channel sub-parts is reduced, the air return channel is simple to assemble, and the automation degree is high.
In the invention, in order to maintain the flatness of the whole refrigerator, under an optimal condition, a sink 11 matched with the contour of the return air duct cover plate 9 is reserved on the rear back plate 10.
In the present invention, the connection manner of the air return duct cover plate 9 and the back plate 10 may be known by those skilled in the art, and under a preferable condition, the connection manner of the air return duct cover plate 9 and the back plate 10 is selected from at least one of an adhesive connection, a snap connection, a screw connection, and a double-sided tape connection, and is more preferably an adhesive.
According to the present invention, in order to improve the thermal conductivity in the freezing return air duct, the return air duct cover plate 9 is preferably made of metal or plastic with aluminum foil applied on the surface.
In a preferred embodiment of the present invention, the method for assembling the freezing return air duct of the refrigerator comprises the following steps: conveying the air return duct cover plate 9 to a production line, and performing grabbing operation by a robot; and then, gluing the periphery of the sinking groove 11 and/or the air return channel cover plate 9, firmly installing the air return channel cover plate 9 on the refrigerator liner 1, and assembling to form the refrigerating air return channel.
Fig. 3 is a flowchart of a defrosting control method for a freezer return air duct of a refrigerator according to an embodiment of the present invention, and as shown in fig. 3, a second aspect of the present invention provides a defrosting control method for the freezer return air duct of the refrigerator provided by the first aspect, the defrosting control method including:
judging whether the refrigerator meets defrosting conditions every other preset defrosting period;
under the condition that the refrigerator meets defrosting conditions, a refrigerator compressor is closed, the refrigerator compressor stops working, and a defrosting heater starts working;
acquiring temperature T of defrosting sensorh；
Judgment of ThWhether a preset exit temperature is reached;
at ThAcquiring the temperature Tx of an air return sensor under the condition of reaching a preset exit temperature;
when Tx is less than or equal to 0 ℃, the defrosting heater continues to work until Tx reaches 3 ℃, the defrosting heater stops working, and meanwhile the time of the next defrosting period is reduced by D1。
In the invention, a return air sensor (the sensor is positioned at the middle upper part of the return air cavity) is arranged in the return air duct to detect the temperature Tx in the return air cavity.
According to the present invention, the defrosting condition may be known to those skilled in the art, and may be, for example, the cumulative operating time of the compressor during the refrigeration process of the refrigerator; meanwhile, the environment temperature sensor detects the current environment temperature Ts, compares the preset environment temperature interval of the system, meets the defrosting condition when the accumulated working time of the compressor reaches the preset value, and enters a defrosting mode.
According to the invention, the preset exit temperature is preferably in the range of 5 to 10 ℃.
In order to further improve the defrosting efficiency of the freezing return air duct and reduce the energy consumption, under the preferable conditions, D is1Is in the range of 8-12 h.
In a preferred embodiment of the present invention, the defrosting control method further comprises: when Tx is more than 0 and less than 5 ℃, the defrosting heater continues to work until Tx reaches 5 ℃ or ThTo reach T1(the range of T1 is that the preset exit temperature is plus 2-4 ℃), at this time, the defrosting heater stops working, and the time of the next defrosting period is reduced by D2。
In order to further improve the defrosting efficiency of the freezing return air duct and reduce the energy consumption, under the preferable conditions, D is2Is in the range of 5-9 h.
Under preferred conditions, said D2＜D1。
In a preferred embodiment of the present invention, the defrosting control method includes: when Tx is more than or equal to 5 and less than 8 ℃, frost in the air return duct is not completely melted, and the defrosting heater stops working; while the next defrost cycle time is reduced by D3In order to further improve the defrosting efficiency of the freezing return air duct and reduce the energy consumption, under the preferable conditions, D is3Is in the range of 2-6 h.
Further preferably, D is3＜D2。
In a preferred embodiment of the present invention, the defrosting control method further comprises: when Tx is more than or equal to 8 ℃, frost in the air return duct is completely melted, the defrosting heater stops working, and the control logic of the next defrosting period is kept unchanged.
The invention is further illustrated by the following examples.
The following examples are all carried out in the freezer return air duct of the refrigerator shown in fig. 1 to 2.
Example 1
A defrosting control method of a freezing return air duct of a refrigerator comprises the following steps:
s1, judging whether the refrigerator meets defrosting conditions every other preset defrosting period;
s2, under the condition that the refrigerator meets the defrosting condition, the refrigerator compressor is closed, the refrigerator compressor stops working, and the defrosting heater starts working;
s3, acquiring the temperature T of the defrosting sensorh；
S4, judgment ThWhether the preset exit temperature is reached to 8 ℃;
s5, at ThAcquiring the temperature Tx of an air return sensor under the condition of reaching a preset exit temperature;
and S6, when Tx is less than or equal to 0 ℃, the defrosting heater continues to work until Tx reaches 3 ℃, the defrosting heater stops working, and meanwhile the time of the next defrosting cycle is reduced by 12 h.
Example 2
A defrosting control method of a freezing return air duct of a refrigerator comprises the following steps:
s1, judging whether the refrigerator meets defrosting conditions every other preset defrosting period;
s2, under the condition that the refrigerator meets the defrosting condition, the refrigerator compressor is closed, the refrigerator compressor stops working, and the defrosting heater starts working;
s3, acquiring the temperature T of the defrosting sensorh；
S4, judgment ThWhether the preset exit temperature is reached to 8 ℃;
s5, at ThAcquiring the temperature Tx of an air return sensor under the condition of reaching a preset exit temperature;
s6, when Tx is more than 0 and less than 5 ℃, the defrosting heater continues to work until Tx reaches 5 ℃ or ThWhen the temperature reaches 10-12 ℃, the defrosting heater stops working at the moment, and the time of the next defrosting period is reduced by 6 hours.
Example 3
A defrosting control method of a freezing return air duct of a refrigerator comprises the following steps:
s1, judging whether the refrigerator meets defrosting conditions every other preset defrosting period;
s2, under the condition that the refrigerator meets the defrosting condition, the refrigerator compressor is closed, the refrigerator compressor stops working, and the defrosting heater starts working;
s3, acquiring the temperature T of the defrosting sensorh；
S4, judgment ThWhether a preset exit temperature is reached;
s5, at ThAcquiring the temperature Tx of an air return sensor under the condition of reaching a preset exit temperature;
s6, when Tx is more than or equal to 5 and less than 8 ℃, frost in the air return duct is not completely melted, and the defrosting heater stops working; meanwhile, the time of the next defrosting period is reduced by 3 h.
Example 4
A defrosting control method of a freezing return air duct of a refrigerator comprises the following steps:
s1, judging whether the refrigerator meets defrosting conditions every other preset defrosting period;
s2, under the condition that the refrigerator meets the defrosting condition, the refrigerator compressor is closed, the refrigerator compressor stops working, and the defrosting heater starts working;
s3, acquiring the temperature T of the defrosting sensorh；
S4, judgment ThWhether a preset exit temperature is reached;
s5, at ThAcquiring the temperature Tx of an air return sensor under the condition of reaching a preset exit temperature;
s6, when Tx is larger than or equal to 8 ℃, frost in the air return duct is completely melted, and the defrosting heater stops working; the next defrost cycle control logic remains unchanged.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (9)
1. The freezing return air duct of the refrigerator is characterized by comprising a freezing box liner (1) and a return air duct cover plate (9), wherein a groove is integrally formed in a back plate (10) of the freezing box liner (1), and the return air duct cover plate is attached to the back plate and surrounds the groove to form the freezing return air duct.
2. The refrigerator freezing return air duct according to claim 1, characterized in that a sink groove (11) matching with the contour of the return air duct cover plate (9) is reserved on the back plate (10).
3. The refrigerator freezing return air duct according to claim 1, wherein the connection mode of the return air duct cover plate (9) and the back plate (10) is at least one selected from the group consisting of an adhesive connection, a snap connection, a screw connection and a double-sided adhesive connection.
4. A defrosting control method of a refrigerator freezing return air duct according to any one of claims 1 to 3, characterized in that the defrosting control method comprises:
judging whether the refrigerator meets defrosting conditions or not according to the environment temperature and the accumulated working time of the compressor in the running process of the refrigerator every other preset defrosting period;
under the condition that the refrigerator meets defrosting conditions, a refrigerator compressor is closed, the refrigerator compressor stops working, and a defrosting heater starts working;
acquiring temperature T of defrosting sensorh；
Judgment of ThWhether a preset exit temperature is reached;
at ThAcquiring the temperature Tx of an air return sensor under the condition of reaching a preset exit temperature;
when Tx is less than or equal to 0 ℃, removeThe defrosting heater continues to operate until Tx reaches 3 ℃, the defrosting heater stops operating, and the time of the next defrosting cycle is reduced by D1。
5. The defrosting control method according to claim 4, wherein the defrosting control method comprises:
when Tx is more than 0 and less than 5 ℃, the defrosting heater continues to work until Tx reaches 5 ℃ or ThTo reach T1At this time, the defrosting heater stops working, and the next defrosting cycle time is reduced by D2；
Wherein T is1The range of (A) is as follows: is 2-4 ℃ higher than the preset exit temperature.
6. The defrosting control method according to claim 5 wherein D is the amount of water added2＜D1。
7. The defrosting control method according to claim 5, wherein the defrosting control method comprises:
when Tx is more than or equal to 5 and less than 8 ℃, frost in the air return duct is not completely melted, and the defrosting heater stops working; while the next defrost cycle time is reduced by D3。
8. The defrosting control method according to claim 7 wherein the D is3＜D2。
9. The defrosting control method according to claim 8, wherein the defrosting control method includes:
when Tx is more than or equal to 8 ℃, frost in the air return duct is completely melted, and the defrosting heater stops working; the next defrost cycle control logic remains unchanged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011502544.XA CN112696860A (en) | 2020-12-18 | 2020-12-18 | Refrigerator freezing return air duct and defrosting control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011502544.XA CN112696860A (en) | 2020-12-18 | 2020-12-18 | Refrigerator freezing return air duct and defrosting control method thereof |
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| CN112696860A true CN112696860A (en) | 2021-04-23 |
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| CN202011502544.XA Pending CN112696860A (en) | 2020-12-18 | 2020-12-18 | Refrigerator freezing return air duct and defrosting control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739494A (en) * | 2021-09-15 | 2021-12-03 | 安徽康佳同创电器有限公司 | Air duct structure and refrigerator |
| WO2022227305A1 (en) * | 2021-04-26 | 2022-11-03 | 合肥朗驰工业设计有限公司 | Refrigerator air duct structure, refrigerator refrigerating air duct, refrigerator freezing air duct, and refrigerator |
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| CN111486646A (en) * | 2020-04-17 | 2020-08-04 | 合肥华凌股份有限公司 | Refrigerator and defrosting control method and device thereof |
| CN112033087A (en) * | 2020-08-06 | 2020-12-04 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022227305A1 (en) * | 2021-04-26 | 2022-11-03 | 合肥朗驰工业设计有限公司 | Refrigerator air duct structure, refrigerator refrigerating air duct, refrigerator freezing air duct, and refrigerator |
| CN113739494A (en) * | 2021-09-15 | 2021-12-03 | 安徽康佳同创电器有限公司 | Air duct structure and refrigerator |
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Application publication date: 20210423 |