CN100359271C - Defrosting apparatus for refrigerator and defrosting method thereof - Google Patents
Defrosting apparatus for refrigerator and defrosting method thereof Download PDFInfo
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- CN100359271C CN100359271C CNB031298540A CN03129854A CN100359271C CN 100359271 C CN100359271 C CN 100359271C CN B031298540 A CNB031298540 A CN B031298540A CN 03129854 A CN03129854 A CN 03129854A CN 100359271 C CN100359271 C CN 100359271C
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- heater
- evaporimeter
- refrigerator
- defrost
- frost removal
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Abstract
The present invention discloses a frost removal apparatus for a refrigerator and a frost removal method thereof, which belongs to the electrical heating frost removal of the refrigerator. The frost removal apparatus comprises frost removal heaters and auxiliary heaters respectively arranged on and around an evaporator, and the evaporator is also provided with a heater of a periodical switch. The frost removal method comprises a frost removal method formed by the frost removal heaters and the auxiliary heaters respectively arranged on and around the evaporator. The evaporator is also provided with the heater transferring to the surface of the evaporator according to the periodical switch. When the pressure loss of the air passing through the evaporator reaches a set value, the heater periodically runs and stops time and again. When the pressure loss of the air reaches the set value, the operation of the compressor and a blowing fan is stopped, and the heater is made to defrost in certain time; the heater operation is stopped, and the compressor and the blowing fan are made to run. Compared with the past art, the frost removal cycle is extended, the frost removal time is shortened, the frost removal efficiency and the heat exchange effectiveness of the refrigerator are enhanced, and the power consumption is reduced.
Description
Technical field
The present invention relates to the electrical heating defrosting, particularly a kind of defroster of refrigerator and Defrost method thereof of refrigerator.
Background technology
Refrigerator makes low temperatureization in the case by the cool cycles of refrigerant compression condensation-expansions-evaporation repeatedly, so as to make food during necessarily in the fresh device of maintenance, therefore, refrigerator is requisite household electrical appliance in living.
This refrigerator is to be the gaseous coolant of HTHP by compressor with the gaseous coolant increasing temperature and pressure of low-temp low-pressure; Rely on the refrigerant that from compressor, flows out condenser to carry out condensation; By the expansion valve narrower and small the refrigerant that flows out from condenser is reduced pressure than the diameter of other parts; Refrigerant by above-mentioned expansion valve is evaporated at low-pressure state, so that the evaporimeter of heat is that the basic element of character constitutes freeze cycle in the respiratory box.
Followingly the structure and the function of general refrigerator are carried out following explanation with reference to accompanying drawing.
As shown in Figure 1, evaporimeter 5 flows directly into the inside of the cabinet 1 of filling heat-barrier material to the cold air of heat exchange, the refrigerating chamber 2 about the temperature inside the box is remained on approximately-18 ℃; The cold air of refrigerating chamber 2 is sent to makes the temperature inside the box remain on refrigerating chamber 3 about about 0-7 ℃; The back lower place of its refrigerating chamber 3 is provided with the Machine Room (not shown) that compressor and condenser, solar heat protection fan etc. are installed.
For one side in the circulation of refrigerating chamber and refrigerating chamber, one side by the high temperature change the cold air cold duct 10 of sending into the rear of refrigerating chamber 2 carry out heat exchange.10 li of cold ducts evaporimeter 5 is installed and through evaporimeter the time by the cold air of low temperatureization, be sent to blowing fan 9 that carries out forced circulation in the refrigerating chamber 2 and the motor 8 that drives blowing fan by cold air outlet 11.
The cold air that can make refrigerating chamber 2 and refrigerating chamber 3 is installed between refrigerating chamber 2 and refrigerating chamber 3 carries out free-pouring a plurality of connected entrance formation circulating cold air pipeline 12, so that the cold air of refrigerating chamber is to the refrigerating chamber supply, the cold air of refrigerating chamber flows into to cold air path 10 by circulating cold air pipeline 12.
13 is doors of refrigerating chamber among the figure.
The drive manner of refrigerator is as follows.
At first, fill under the situation of food in refrigerating chamber 2 and refrigerating chamber 3, if connect power supply, the compressor of Machine Room forms heat exchange environment in evaporimeter 5 in the running of controlled signal (not shown) back.Therefore, the cold air heat absorption back by evaporimeter is by low temperatureization, and is sent to refrigerating chamber 2 by blowing fan 9, and the part in the cold air is admitted to refrigerating chamber by the cold air connected entrance.Then, when circulating above-mentioned refrigerating chamber 2 and refrigerating chamber 3, the cold air of intensification is admitted to the circulating cold air of evaporimeter 5 again by circulating cold air pipeline 12.
In addition, the interior moisture that flows into is producing white phenomenon on evaporimeter 5 from refrigerator.This frost is the key element that hinders cold air flow, can reduce cooling effectiveness, so just need carry out the Defrost operation process in certain hour.
For this reason, around above-mentioned evaporimeter, be provided with a plurality of Defrost heaters 6 and auxiliary heater 7.Defrost heater 6 contacts with evaporimeter 5, and according to its purposes, it is a kind of contact heat transfer heater that transmits heat on evaporimeter; And auxiliary heater 7 keeps certain distance with evaporimeter and is separated, and according to radiation theory, it is a kind ofly to transmit heat on the limit of evaporimeter, so that the contactless heat transfer heater of defrosting.Can be during use according to the kind of refrigerator, wherein one or both are used in selection.
During defrosting, within a certain period of time, by power supply being connected on above-mentioned Defrost heater 6 and the auxiliary heater 7, on the limit of evaporimeter 5, transmit heat, can remove on the evaporimeter frost.At this moment, the water that defrost produces is discharged to the outside of refrigerator by other collector pipe and dust-collecting bucket.Simultaneously, also can allow it evaporate voluntarily.
But, when heating defrosting, during defrosting, can not move freeze cycle, because in the hot-fluid cartonning of Defrost heater and auxiliary heater, have the problem that causes the temperature inside the box to be enhanced by Defrost heater and auxiliary heater.
Summary of the invention
The present invention is the invention that proposes in order to address the above problem.Its objective is slows down on evaporimeter, generate the growth rate of frost thickness, increase density and prolong defrosting cycle and shorten defrosting time, so that the minimization of loss that defrosting produces.And, reduce loss of air pressur by evaporimeter, improving the efficient of whole cool cycles, and provide the defroster and the Defrost method of refrigerator.
The present invention realizes like this.
A kind of defroster of refrigerator, be included on the evaporimeter settled on the cooling duct of refrigerator and the evaporimeter and around the Defrost heater and the auxiliary heater that are provided with, and on evaporimeter, also be equipped with by the some cycles switch, the heater that conducts heat to evaporimeter simultaneously.
The defroster of described refrigerator, its heater are to adopt heat transfer element.
A kind of Defrost method of refrigerator, comprise by compressor, condenser, be installed in the solar heat protection of on the condenser extraneous air being forced to send into and fan, the evaporimeter of installing on the cold duct at refrigerator rear, the blowing fan that cooling air in the case is sent into constitutes refrigerator, and around reaching on the evaporimeter Defrost heater and the formed Defrost method of auxiliary heater are set, and on evaporimeter, also be equipped with by the some cycles switch, the heater that conducts heat to evaporator surface simultaneously
A. reach when setting value, the stage that heater repeatedly turns round and stops when loss of air pressur in some cycles by evaporimeter;
B. when the loss of air pressur by evaporimeter reaches setting value, stop the running of compressor and blowing fan, and heater is turned round within a certain period of time to carry out the stage of defrosting;
C. stop the running of heater, and make the stage of compressor and blowing fan running.
Above-mentioned heater adopts heat transfer element to constitute good.
According to as above invention, on evaporimeter, generating the growth of frost thickness by slowing down, increase density, reduce loss of air pressur, improve pyroconductivity, this compares with conventional art, not only prolonged defrosting cycle, but also shortened defrosting time, the minimization of loss that defrost process is produced.Like this, improve the defrosting efficiency and the heat exchanger effectiveness of refrigerator, and reduced power consumption.
Simple declaration to drawing:
Fig. 1 is the vertical section structure schematic diagram of general refrigerator main composition part in the background technology.
Fig. 2 is the main composition vertical section structure schematic diagram partly of the refrigerator of invention.
Fig. 3 is the flow chart of Defrost method of the present invention.
Fig. 4 is the pressure loss ascending curve chart of Defrost method of the present invention and old-fashioned Defrost method.
Below be explanation to major part symbol among the figure:
5 evaporimeters, 6 Defrost heaters, 7 auxiliary heaters, 16 heat transfer elements.
The specific embodiment
Followingly be elaborated with reference to the defroster and the Defrost method of drawings and Examples to refrigerator of the present invention.
The upper inside of cabinet 1 is divided into refrigerating chamber 2, and downside is divided into refrigerating chamber 3, and the circulating cold air pipeline 12 of circulation cold air is installed between refrigerating chamber 2 and refrigerating chamber 3.
The blowing fan 9 that the circulating air of evaporimeter 5 coolings is sent to refrigerating chamber is installed on the cold duct 10 at refrigerating chamber 2 rears.
In order to defrost, the Defrost heater 6 of plural number is installed on evaporimeter 5, during defrosting, on the bottom of evaporimeter 5, be equipped with and transmit photothermal auxiliary heater 7.
In addition, the heat transfer elements 16 of also going up the hot plural number of transmission rapidly to evaporimeter 5 surfaces of opening (ON) pass (OFF) by some cycles also are installed on the evaporimeter 5.
Heat transfer element 16 transmits heat by instantaneous time to evaporimeter 5, have slow down attached on the evaporimeter 5 the effect that increases of white thickness.
Specifically, the frost layer that on evaporimeter 5, adheres to, its basic structure is brilliant for tree, when cool cycles, it is destroyed fully and restores, if carry out transient heating facing to the frost layer, the brilliant ledge of frost layer tree when melting, the ditch between the beginning filling tree crystalline substance, therefore, when frost thickness is reduced, then improve its density.
If periodically repeat this phenomenon, just the thickness of the frost layer that can slow down increases, increase its density gradually, along with the increase of density, the coefficient of heat conduction improves, and thermal conduction effect also improves thereupon.
As mentioned above, press some cycles towards the heating of frost layer, the thickness of the frost layer that slowing down increases, and when increasing its density, same as shown in Figure 4, by slowing down the increase of the evaporator air pressure loss, compare with conventional art, prolonged defrosting cycle, defrosting time is also than reduced in the past.
Certainly, Defrost heater 6 also can be periodically to evaporimeter 5 the heating of frost layer.But Defrost heater 6 can not accurately be controlled temperature, therefore has the shortcoming that moment produces high heat, so compare weak effect with heat transfer element 16.
A kind of Defrost method of refrigerator, comprise by compressor, condenser is installed in the solar heat protection of on the condenser extraneous air being forced to send into and fans the evaporimeter of installing on the cold duct at refrigerator rear, the blowing fan that cooling air in the case is sent into constitutes refrigerator, and on the evaporimeter and around Defrost heater and the formed Defrost method of auxiliary heater are set, and on evaporimeter, also be equipped with by the some cycles switch, simultaneously the heater that conducts heat to evaporator surface, therefore
A. reach when setting value, the stage that heater repeatedly turns round and stops when loss of air pressur in some cycles by evaporimeter;
B. when the loss of air pressur by evaporimeter reaches setting value, stop the running of compressor and blowing fan, and heater is turned round within a certain period of time to carry out the stage of defrosting;
C. stop the running of heater, and make the stage of compressor and blowing fan running.
Below, with reference to Fig. 3 and Fig. 4, having as above to apparatus, the Defrost method of defroster describes.
At first, power supply is connected on the refrigerator, in compressor (not shown) and blowing fan 9 (with reference to Fig. 2) running, carries out cool cycles.When extraneous air passes through evaporimeter 5 (with reference to Fig. 2), also on evaporimeter 5, slowly carrying out white phenomenon.At this moment, heat transfer element 16 (with reference to Fig. 2) is in running order.
Secondly, controller (not shown) ends during to the setting value that reaches certain loss of air pressur (Δ P) when power supply is connected on the refrigerator, presses the certain hour cycle, and heat transfer element 16 is opened.Therefore, the thickness growth of frost layer of just slowing down, and increase its density.
Same as described above, heat transfer element 16 is in repeatedly defrosting, and carry out in the process of cool cycles, if the loss of air pressur (Δ P) by evaporimeter 5 reaches setting value, compressor and blowing fan 9 just shut down, simultaneously, Defrost heater 6 (with reference to Fig. 2) and auxiliary heater 7 (with reference to Fig. 2) just turn round, and defrost.
At this moment, owing to the increase of frost layer density, the coefficient of heat conduction also increases simultaneously, so have the advantage of defrosting time (Δ T2) than the defrosting time of refrigerator (Δ T1) minimizing in the past.
If surpass the defrosting time of setting (Δ T2), just the operation of Defrost heater 6 and auxiliary heater 7 stops, then rerunning compressor and blowing fan 9, carry out cool cycles.From at this moment, above-mentioned heat transfer element 16 repeats to close by some cycles again.
In addition, aforesaid defroster and Defrost method can not be confined to refrigerator shown in Figure 2, also all have same or similar effects for various refrigerators such as block form refrigerators.
Claims (4)
1. the defroster of a refrigerator, be included on the evaporimeter settled on the cooling duct of refrigerator and the evaporimeter and around the Defrost heater and the auxiliary heater that are provided with, it is characterized in that being equipped with on the evaporimeter by the some cycles switch, the heater that while conducts heat to evaporimeter, heater is to the instantaneous heat transfer of evaporimeter, have slow down attached on the evaporimeter the effect that increases of white thickness.
2. the Defrost method of a refrigerator, comprise by compressor, condenser, being installed in the solar heat protection of on the condenser extraneous air being forced to send into fans, the evaporimeter of installing on the cold duct at refrigerator rear, the blowing fan that cooling air in the case is sent into constitutes refrigerator, and around reaching on the evaporimeter Defrost heater and the formed Defrost method of auxiliary heater are set, it is characterized in that on evaporimeter, also being equipped with by the some cycles switch, the heater that while conducts heat to evaporator surface, heater is to the instantaneous heat transfer of evaporimeter, have slow down attached on the evaporimeter the effect that increases of white thickness, Defrost method carries out according to following steps:
A. when receiving on the refrigerator, power supply when the loss of air pressur by evaporimeter reaches setting value, ends the stage that heater repeatedly turns round and stops in some cycles;
B. when the loss of air pressur by evaporimeter reaches setting value, stop the running of compressor and blowing fan, and Defrost heater and auxiliary heater are turned round within a certain period of time to carry out the stage of defrosting;
C. stop the running of Defrost heater and auxiliary heater, and make the stage of compressor and blowing fan running.
3. according to the defroster of the described refrigerator of claim 1, it is characterized in that described heater is to adopt heat transfer element.
4. according to the Defrost method of the described refrigerator of claim 2, it is characterized in that described heater is to adopt heat transfer element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031298540A CN100359271C (en) | 2003-05-20 | 2003-05-20 | Defrosting apparatus for refrigerator and defrosting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031298540A CN100359271C (en) | 2003-05-20 | 2003-05-20 | Defrosting apparatus for refrigerator and defrosting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1548882A CN1548882A (en) | 2004-11-24 |
| CN100359271C true CN100359271C (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031298540A Expired - Fee Related CN100359271C (en) | 2003-05-20 | 2003-05-20 | Defrosting apparatus for refrigerator and defrosting method thereof |
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| CN (1) | CN100359271C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464141C (en) * | 2005-11-17 | 2009-02-25 | 财团法人工业技术研究院 | Method and device for removing frost from storeroom of refrigerating device |
| CN104879977A (en) * | 2014-02-28 | 2015-09-02 | 株式会社电装 | Apparatus for adjusting temperature and storing |
| CN104390415A (en) * | 2014-10-31 | 2015-03-04 | 合肥晶弘电器有限公司 | Defrosting system of air-cooled refrigerator, control method for defrosting system and air-cooled refrigerator |
| CN105091233B (en) * | 2015-08-11 | 2018-06-01 | 珠海格力电器股份有限公司 | The frosting detection method and device of air-conditioner outdoor unit |
| CN106016876B (en) * | 2016-07-29 | 2018-08-28 | 合肥华凌股份有限公司 | Control method, control device and the refrigerator of evaporator defrost |
| CN110926093B (en) * | 2019-12-06 | 2021-07-23 | 四方科技集团股份有限公司 | On-demand defrosting method for air cooler |
| WO2021171356A1 (en) * | 2020-02-25 | 2021-09-02 | 三菱電機株式会社 | Refrigerator |
| JP2023013290A (en) * | 2021-07-15 | 2023-01-26 | アクア株式会社 | refrigerator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2055919U (en) * | 1988-05-12 | 1990-04-11 | 三星电子株式会社 | Refrigerating chamber evaporator assembly construction of direct cooling refrigerator |
| CN1064740A (en) * | 1991-01-31 | 1992-09-23 | 三星电子株式会社 | the defrosting control circuit of refrigerator |
| CN2458572Y (en) * | 2000-08-07 | 2001-11-07 | 李晓华 | Refrigerator |
| KR20030028952A (en) * | 2001-10-04 | 2003-04-11 | 엘지전자 주식회사 | refrigerator |
-
2003
- 2003-05-20 CN CNB031298540A patent/CN100359271C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2055919U (en) * | 1988-05-12 | 1990-04-11 | 三星电子株式会社 | Refrigerating chamber evaporator assembly construction of direct cooling refrigerator |
| CN1064740A (en) * | 1991-01-31 | 1992-09-23 | 三星电子株式会社 | the defrosting control circuit of refrigerator |
| CN2458572Y (en) * | 2000-08-07 | 2001-11-07 | 李晓华 | Refrigerator |
| KR20030028952A (en) * | 2001-10-04 | 2003-04-11 | 엘지전자 주식회사 | refrigerator |
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| CN1548882A (en) | 2004-11-24 |
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Granted publication date: 20080102 |