CN103868309A - Device for assisting in defrosting through electric heating by utilizing air outside refrigerating chamber and operating method of device - Google Patents
Device for assisting in defrosting through electric heating by utilizing air outside refrigerating chamber and operating method of device Download PDFInfo
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- CN103868309A CN103868309A CN201410102776.4A CN201410102776A CN103868309A CN 103868309 A CN103868309 A CN 103868309A CN 201410102776 A CN201410102776 A CN 201410102776A CN 103868309 A CN103868309 A CN 103868309A
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Abstract
The invention discloses a device for assisting in defrosting through electric heating by utilizing air outside a refrigerating chamber and an operating method of the device. A heat insulating box is arranged at the upper part of a cold storage chamber, a first electric air valve is arranged at an inlet of the heat insulating box, a second electric air valve is arranged at an outlet of the heat insulating box, the top of the heat insulating box is provided with two air passages extending out of the cold storage chamber, a third electric air valve and a fourth electric air valve are arranged in the two air passages, an evaporator is arranged inside the heat insulating box, an electric heater is arranged in the evaporator, an air circulating air passage is formed between the bottom of the evaporator and a bottom plate of the heat insulating box, an inlet of the evaporator is connected with a throttling device, an outlet of the evaporator is connected with an air suction port of a compressor, an inlet of a condenser is connected with an exhaust port of the compressor, and an outlet of the condenser is connected with the throttling device. In the process of defrosting through electric heating, the air outside the refrigerating chamber and opening and closing of the electric air valves are utilized for assisting in defrosting through electric heating, so that the time of defrosting through electric heating is reduced, the operating energy consumption of the whole system is reduced, and relative stable temperature in the storage during defrosting is ensured.
Description
Technical field
The invention belongs to low temperature and refrigeration field, more particularly, relate to a kind of device and method of operation thereof of utilizing the defrosting of freezer outside air auxiliary electrical heater, utilize freezer outside air and Electric air valve control to carry out auxiliary evaporator and realize electric heated defrosting.
Background technology
At present, the freezer total capacity of China is increasing year by year, and the defrosting problem of freezer is the hot issue that low temperature and refrigeration field are paid close attention to always.In order to make agricultural and sideline food have better fresh-keeping effect, freezer domestic demand provides the environment of a kind of " low temperature and high relative humidity ".Circulated air is met the cold frosting on evaporator surface that is easy to, frost layer is along with constantly accumulation thickening of time, heat transfer effect to evaporimeter has a strong impact on, the flow resistance that the circulated air of evaporimeter is subject to simultaneously also constantly increases, cause the internal circulating load of air reduce and cause fan condition point to change, increased the operation energy consumption of blower fan.Therefore, the evaporator surface of freezer is defrosted timely and effectively, significant to the efficient and energy-saving run of freezer system.
Electrical heating type Defrost method, as one of Defrost method of freezer, is characterized in simple in structure, is easy to install and control, but its shortcoming is that power consumption is larger in defrost process.Carrying out in electrical heating process, the little part heat of the thermal discharge of electric heater is for the defrosting of evaporimeter in addition, and most of thermal discharge falls apart in freezer, has increased freezer refrigeration duty, larger to the temperature fluctuation in freezer.While starting electric heated defrosting, will make the temperature of evaporimeter surrounding air raise, eliminate again this part refrigeration duty except refrigeration system after frost, cause very large energy waste.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of defroster and the method for operation thereof are provided, carry out auxiliary electrical heater defrosting, reduce the time of electric heated defrosting, reduce the operation energy consumption of whole system, while guaranteeing defrosting, storehouse temperature is relatively stable simultaneously, and freezer defrosting research is had to very important realistic meaning.
In electric heated defrosting process, utilize the switch of freezer outside air and Electric air valve, can realize utilize air as Cooling and Heat Source to the air preheat in the incubator of evaporimeter periphery and precooling, to reduce electric heater airborne heat radiation, electric heater air heat release towards periphery is towards periphery increased in defrost process refrigeration duty, overcome incubator outside the evaporimeter problems such as in the frosting of evaporimeter secondary, defrost process temperature of ice house fluctuation is large in temperature-fall period.
Technical purpose of the present invention is achieved by following technical proposals:
The device that utilizes the defrosting of freezer outside air auxiliary electrical heater, comprises incubator, evaporimeter, electric heater, the first Electric air valve, the second Electric air valve, the 3rd Electric air valve, the 4th Electric air valve, throttling arrangement, condenser, compressor, wherein:
Upper space between Storage in cold bank arranges incubator, in import and the outlet of incubator, the first Electric air valve and the second Electric air valve is set respectively; Two air channels of stretching out between Storage in cold bank are set at incubator top, and respectively the 3rd Electric air valve and the 3rd Electric air valve are set in two air channels;
Upper space in incubator inside arranges evaporimeter, selects evaporimeter top to be arranged on incubator top board; In evaporimeter, be provided with electric heater, between the bottom of evaporimeter and incubator base plate, leave air circulation channel;
Evaporator is connected with throttling arrangement, and evaporator outlet is connected with the air entry of compressor; The import of condenser is connected with the exhaust outlet of compressor, and the outlet of condenser is connected with throttling arrangement.
Be chosen in difference set temperature sensor between incubator, Storage in cold bank and in external environment, with collecting temperature signal, control the duty of the first Electric air valve, the second Electric air valve, the 3rd Electric air valve and the 4th Electric air valve.
In technical scheme of the present invention, by the various combination of 4 Electric air valve on off states, realize evaporimeter and in the time of electric heated defrosting, utilize outside air between Storage in cold bank to carry out the air preheat in incubator and precooling:
In the time starting to defrost, compressor cuts out and stops refrigeration, and the first Electric air valve and the second Electric air valve are closed, and the 3rd Electric air valve and the 4th electric opening make air and freezer outside air in incubator carry out the wet exchange of heat by the blower fan action of evaporimeter;
In the time that insulation the temperature inside the box is identical with ambient temperature, close the 3rd electronic and the 4th Electric air valve, opening electric heater carries out circulating defrosting by heat conduction and convection type in incubator;
After defrosting proceeds to a certain degree (occur frost drop situation), close electric heater, open the 3rd electronic and the 4th Electric air valve, make air in insulation and freezer outside air carry out heat by the blower fan action of evaporimeter and wet and exchange;
In the time that insulation the temperature inside the box is identical with ambient temperature, close the 3rd electronic and the 4th Electric air valve, open compressor starts to refrigeration cool-down in incubator; When the temperature in incubator drop to Storage in cold bank between temperature when identical, the first Electric air valve and the second Electric air valve are opened, system is with conventional freezer refrigerating mode operation.
Compared with prior art, owing to adding two air channels between incubator and freezer outside air, technical scheme of the present invention has following beneficial effect:
(1) by the various combination of four Electric air valve on off states, before electric heated defrosting, utilize freezer outside air to the atmosphere temperature rising in incubator as thermal source, saved the portion of energy that electric heater air heat release towards periphery consumes, summer condition energy saving comparison is obvious.
(2) by the various combination of four Electric air valve on off states, after electric heated defrosting, utilize freezer outside air to the air cooling-down in incubator as low-temperature receiver, saved the portion of energy that refrigeration system consumes for eliminating the refrigeration duty of electric heater air heat release towards periphery increase, winter condition energy saving comparison is obvious.
(3) while utilizing electric heating circulation defrosting, in incubator, air humidity increases, air in freezer outside air and incubator carries out, in the wet exchange process of heat, incubator air humidity being reduced, and can reduce incubator evaporimeter secondary frosting degree in temperature-fall period.
Accompanying drawing explanation
Fig. 1 be the device of freezer outside air auxiliary electrical heater defrosting that utilizes of the present invention at the structural principle schematic diagram of air preheat and precooling defrost phase, wherein 1 between Storage in cold bank, 2 for incubator, 3 for evaporimeter, 4 for electric heater, 5 be the first Electric air valve, 6 be the second Electric air valve, 7 be the 3rd Electric air valve, 8 be the 4th Electric air valve, 9 for throttling arrangement, 10 for condenser, 11 be compressor.
Fig. 2 be the device of freezer outside air auxiliary electrical heater defrosting that utilizes of the present invention at the structural principle schematic diagram of electric heating circulation defrost phase, wherein 1 between Storage in cold bank, 2 for incubator, 3 for evaporimeter, 4 for electric heater, 5 be the first Electric air valve, 6 be the second Electric air valve, 7 be the 3rd Electric air valve, 8 be the 4th Electric air valve, 9 for throttling arrangement, 10 for condenser, 11 be compressor.
Fig. 3 be the device of freezer outside air auxiliary electrical heater defrosting that utilizes of the present invention at the structural principle schematic diagram in conventional refrigeration mode stage, wherein 1 between Storage in cold bank, 2 for incubator, 3 for evaporimeter, 4 for electric heater, 5 be the first Electric air valve, 6 be the second Electric air valve, 7 be the 3rd Electric air valve, 8 be the 4th Electric air valve, 9 for throttling arrangement, 10 for condenser, 11 be compressor.
The specific embodiment
Further illustrate technical scheme of the present invention below in conjunction with specific embodiment.
As shown in Figure 1, the apparatus structure schematic diagram that utilizes freezer outside air auxiliary electrical heater defrosting of the present invention, 1 between Storage in cold bank, 2 for incubator, 3 for evaporimeter, 4 for electric heater, 5 be the first Electric air valve, 6 be the second Electric air valve, 7 be the 3rd Electric air valve, 8 be the 4th Electric air valve, 9 for throttling arrangement, 10 for condenser, 11 be compressor.
Upper space between Storage in cold bank arranges incubator, in import and the outlet of incubator, the first Electric air valve and the second Electric air valve is set respectively; Two air channels of stretching out between Storage in cold bank are set at incubator top, and respectively the 3rd Electric air valve and the 3rd Electric air valve are set in two air channels;
Upper space in incubator inside arranges evaporimeter, selects evaporimeter top to be arranged on incubator top board; In evaporimeter, be provided with electric heater, between the bottom of evaporimeter and incubator base plate, leave air circulation channel;
Evaporator is connected with throttling arrangement, and evaporator outlet is connected with the air entry of compressor; The import of condenser is connected with the exhaust outlet of compressor, and the outlet of condenser is connected with throttling arrangement.
Be chosen in difference set temperature sensor between incubator, Storage in cold bank and in external environment, with collecting temperature signal, control the duty of the first Electric air valve, the second Electric air valve, the 3rd Electric air valve and the 4th Electric air valve.
Whole system is mainly with conventional refrigeration mode and defrosting mode operation, under defrosting mode, utilize the device of freezer outside air auxiliary electrical heater defrosting can pass through to regulate Electric air valve, move successively with air preheat, electric heating circulation defrosting, air precooling, incubator cooling four-stage again, concrete as shown in accompanying drawing 1-3:
Evaporator defrost pattern
(1) the air preheat stage: start before defrosting, the first Electric air valve 5, the second Electric air valve 6 are closed, the 3rd Electric air valve 7, the 4th Electric air valve 8 are opened, now compressor 11 cuts out and stop refrigeration, the blower fan action by evaporimeter 3 makes between air in incubator 2 and Storage in cold bank 1 outside air carry out that heat is wet to be exchanged.
(2) electric heating circulation defrost phase: when 1 ambient temperature between the interior temperature of incubator 2 and Storage in cold bank is when identical, the 3rd Electric air valve 7, the 4th Electric air valve 8 are closed, electric heater 4 is opened, and by heat conduction and convection type, evaporimeter 3 is carried out to electric heating circulation defrosting.
(3) the air precooling stage: after electric heating circulation defrosting is carried out (be generally frost drop state), the 3rd Electric air valve 7, the 4th Electric air valve 8 are opened, electric heater 4 cuts out, and the blower fan action by evaporimeter 3 makes between air in incubator 2 and Storage in cold bank 1 outside air carry out that heat is wet to be exchanged.
(4) incubator temperature-fall period: when 1 ambient temperature between the interior temperature of incubator 2 and Storage in cold bank is when identical, the 3rd Electric air valve 7, the 4th Electric air valve 8 are closed, now compressor 11 is started to refrigeration, air in incubator 2 is lowered the temperature, when between the interior temperature of incubator 2 and Storage in cold bank, 1 temperature is when identical, defrosting finishes.
In above-mentioned whole defrost process, variations in temperature is divided into two stages, first allow insulation the temperature inside the box progressively heat up, identical with ambient temperature between Storage in cold bank after, recycling electrical heating, make temperature rise to 30-40 degree Celsius; Wait occurring that frost drops after state, allow between incubator and Storage in cold bank external environment carry out the wet exchange of heat (being air cooling insulation the temperature inside the box), between the temperature inside the box to be incubated and Storage in cold bank, ambient temperature is identical, and recycling compressor is lowered the temperature to incubator.
Conventional refrigeration mode: after defrosting all finishes, the first Electric air valve 5, the second Electric air valve 6 are opened, the 3rd Electric air valve 7, the 4th Electric air valve 8 are closed, the high-temperature high-pressure refrigerant steam that now compressor 11 is discharged enters the interior condensation heat release of condenser 10, after throttling arrangement 9 throttlings, flow into evaporimeter 3 and control temperature between Storage in cold bank, after cold-producing medium evaporation, be back to compressor air suction mouth.
Above the present invention is done to exemplary description; should be noted that; in the situation that not departing from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (3)
1. utilize the device of freezer outside air auxiliary electrical heater defrosting, it is characterized in that, comprise incubator, evaporimeter, electric heater, the first Electric air valve, the second Electric air valve, the 3rd Electric air valve, the 4th Electric air valve, throttling arrangement, condenser, compressor, wherein:
Upper space between Storage in cold bank arranges incubator, in import and the outlet of incubator, the first Electric air valve and the second Electric air valve is set respectively; Two air channels of stretching out between Storage in cold bank are set at incubator top, and respectively the 3rd Electric air valve and the 3rd Electric air valve are set in two air channels;
Upper space in incubator inside arranges evaporimeter, selects evaporimeter top to be arranged on incubator top board; In evaporimeter, be provided with electric heater, between the bottom of evaporimeter and incubator base plate, leave air circulation channel;
Evaporator is connected with throttling arrangement, and evaporator outlet is connected with the air entry of compressor; The import of condenser is connected with the exhaust outlet of compressor, and the outlet of condenser is connected with throttling arrangement.
2. the device that utilizes the defrosting of freezer outside air auxiliary electrical heater according to claim 1, it is characterized in that, be chosen in difference set temperature sensor between incubator, Storage in cold bank and in external environment, with collecting temperature signal, control the duty of the first Electric air valve, the second Electric air valve, the 3rd Electric air valve and the 4th Electric air valve.
3. the method for operation of the device that utilizes the defrosting of freezer outside air auxiliary electrical heater as described in claim 1 or 2, it is characterized in that, by the various combination of 4 Electric air valve on off states, realize evaporimeter and in the time of electric heated defrosting, utilize outside air between Storage in cold bank to carry out the air preheat in incubator and precooling:
In the time starting to defrost, compressor cuts out and stops refrigeration, and the first Electric air valve and the second Electric air valve are closed, and the 3rd Electric air valve and the 4th electric opening make air and freezer outside air in incubator carry out the wet exchange of heat by the blower fan action of evaporimeter;
In the time that insulation the temperature inside the box is identical with ambient temperature, close the 3rd electronic and the 4th Electric air valve, opening electric heater carries out circulating defrosting by heat conduction and convection type in incubator;
Defrosting proceeds to while there is situation that frost drops, closes electric heater, opens the 3rd electronic and the 4th Electric air valve, and the blower fan action by evaporimeter makes air in insulation and freezer outside air carry out heat to wet and exchange;
In the time that insulation the temperature inside the box is identical with ambient temperature, close the 3rd electronic and the 4th Electric air valve, open compressor starts to refrigeration cool-down in incubator; When the temperature in incubator drop to Storage in cold bank between temperature when identical, the first Electric air valve and the second Electric air valve are opened, system is with conventional freezer refrigerating mode operation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510660305.XA CN105222478B (en) | 2014-03-19 | 2014-03-19 | The method defrosted using freezer outside air auxiliary electrical heater |
| CN201410102776.4A CN103868309B (en) | 2014-03-19 | 2014-03-19 | The device utilizing freezer outside air auxiliary electrical heater to defrost and the method for operation thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410102776.4A CN103868309B (en) | 2014-03-19 | 2014-03-19 | The device utilizing freezer outside air auxiliary electrical heater to defrost and the method for operation thereof |
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| CN201510660305.XA Division CN105222478B (en) | 2014-03-19 | 2014-03-19 | The method defrosted using freezer outside air auxiliary electrical heater |
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| CN103868309A true CN103868309A (en) | 2014-06-18 |
| CN103868309B CN103868309B (en) | 2016-04-13 |
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| CN201410102776.4A Active CN103868309B (en) | 2014-03-19 | 2014-03-19 | The device utilizing freezer outside air auxiliary electrical heater to defrost and the method for operation thereof |
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| CN104792094A (en) * | 2015-04-29 | 2015-07-22 | 青岛海尔股份有限公司 | Freezing and refrigerating device and defrosting control method thereof |
| CN104807279A (en) * | 2015-04-29 | 2015-07-29 | 青岛海尔股份有限公司 | Freezing and refrigerating device and defrosting control method thereof |
| CN105135792A (en) * | 2015-09-29 | 2015-12-09 | 天津市傲绿农副产品集团股份有限公司 | Air cooler capable of realizing internal defrosting |
| CN105222478A (en) * | 2014-03-19 | 2016-01-06 | 天津大学 | Utilize the method that freezer outside air auxiliary electrical heater defrosts |
| CN105300007A (en) * | 2014-07-22 | 2016-02-03 | 青岛海尔特种电冰柜有限公司 | Air-cooling refrigeration equipment |
| CN106482435A (en) * | 2016-12-05 | 2017-03-08 | 天津商业大学 | A kind of natural Defrost method of cold storage refrigerating system |
| CN106839609A (en) * | 2017-04-06 | 2017-06-13 | 深圳市傲天医疗智能系统有限公司 | Medical refrigerator-freezer defrosting device |
| CN108562097A (en) * | 2018-05-25 | 2018-09-21 | 合肥雪祺电气有限公司 | A kind of cold-storing duct structure of the refrigerator with damper |
| CN108709355A (en) * | 2018-07-02 | 2018-10-26 | 天津商业大学 | Using nature heat source to the freezer of air-cooler defrosting |
| CN109210654A (en) * | 2018-10-15 | 2019-01-15 | 天津商业大学 | A kind of heat pump and air-conditioning system of synchronous defrosting and refrigeration |
| CN109539674A (en) * | 2018-11-01 | 2019-03-29 | Tcl家用电器（合肥）有限公司 | Refrigerator air cooling evaporator frost-removal structure and refrigerator |
| CN110762936A (en) * | 2019-12-09 | 2020-02-07 | 电子科技大学中山学院 | Heat accumulation defrosting system for cold storage air cooler and cold storage |
| CN115900169A (en) * | 2022-12-21 | 2023-04-04 | 天津大学 | Waste heat recovery type air-cooled refrigerator and control method thereof |
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Cited By (18)
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|---|---|---|---|---|
| CN105222478B (en) * | 2014-03-19 | 2017-10-17 | 天津大学 | The method defrosted using freezer outside air auxiliary electrical heater |
| CN105222478A (en) * | 2014-03-19 | 2016-01-06 | 天津大学 | Utilize the method that freezer outside air auxiliary electrical heater defrosts |
| CN105300007A (en) * | 2014-07-22 | 2016-02-03 | 青岛海尔特种电冰柜有限公司 | Air-cooling refrigeration equipment |
| CN105300007B (en) * | 2014-07-22 | 2018-02-13 | 青岛海尔特种电冰柜有限公司 | Air cooling refrigeration equipment |
| CN104792094B (en) * | 2015-04-29 | 2018-02-02 | 青岛海尔股份有限公司 | A kind of fridge-freezer and its defrosting control method |
| CN104807279B (en) * | 2015-04-29 | 2019-01-18 | 青岛海尔股份有限公司 | A kind of fridge-freezer and its defrosting control method |
| CN104792094A (en) * | 2015-04-29 | 2015-07-22 | 青岛海尔股份有限公司 | Freezing and refrigerating device and defrosting control method thereof |
| CN104807279A (en) * | 2015-04-29 | 2015-07-29 | 青岛海尔股份有限公司 | Freezing and refrigerating device and defrosting control method thereof |
| CN105135792A (en) * | 2015-09-29 | 2015-12-09 | 天津市傲绿农副产品集团股份有限公司 | Air cooler capable of realizing internal defrosting |
| CN106482435A (en) * | 2016-12-05 | 2017-03-08 | 天津商业大学 | A kind of natural Defrost method of cold storage refrigerating system |
| CN106839609A (en) * | 2017-04-06 | 2017-06-13 | 深圳市傲天医疗智能系统有限公司 | Medical refrigerator-freezer defrosting device |
| CN108562097A (en) * | 2018-05-25 | 2018-09-21 | 合肥雪祺电气有限公司 | A kind of cold-storing duct structure of the refrigerator with damper |
| CN108709355A (en) * | 2018-07-02 | 2018-10-26 | 天津商业大学 | Using nature heat source to the freezer of air-cooler defrosting |
| CN109210654A (en) * | 2018-10-15 | 2019-01-15 | 天津商业大学 | A kind of heat pump and air-conditioning system of synchronous defrosting and refrigeration |
| CN109539674A (en) * | 2018-11-01 | 2019-03-29 | Tcl家用电器（合肥）有限公司 | Refrigerator air cooling evaporator frost-removal structure and refrigerator |
| CN110762936A (en) * | 2019-12-09 | 2020-02-07 | 电子科技大学中山学院 | Heat accumulation defrosting system for cold storage air cooler and cold storage |
| WO2024052075A1 (en) * | 2022-09-06 | 2024-03-14 | Autostore Technology AS | A system and a method for extracting air from an evaporator unit associated with an automated storage and retrieval system |
| CN115900169A (en) * | 2022-12-21 | 2023-04-04 | 天津大学 | Waste heat recovery type air-cooled refrigerator and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105222478A (en) | 2016-01-06 |
| CN103868309B (en) | 2016-04-13 |
| CN105222478B (en) | 2017-10-17 |
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