CN104329872A - Refrigerator evaporator defrosting method - Google Patents
Refrigerator evaporator defrosting method Download PDFInfo
- Publication number
- CN104329872A CN104329872A CN201410579625.8A CN201410579625A CN104329872A CN 104329872 A CN104329872 A CN 104329872A CN 201410579625 A CN201410579625 A CN 201410579625A CN 104329872 A CN104329872 A CN 104329872A
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- temperature
- refrigerating chamber
- evaporimeter
- evaporator
- refrigeration
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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
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
- F25D21/125—Removing frost by hot-fluid circulating system separate from the refrigerant system the hot fluid being ambient air
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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 the technical field of refrigeration, in particular to a refrigerator evaporator defrosting method. The refrigerator evaporator defrosting method comprises the following steps that S1, in a power-on state of a refrigeration system, when the temperature of a cold storage chamber is lowered to the preset halting temperature, the refrigeration system stops, and in addition, a cold storage fan is closed; S2, in a halting state of the refrigeration system, when the temperature of the cold storage chamber rises to the preset defrosting temperature of the cold storage chamber, the cold storage fan starts, and air circulation between the cold storage chamber and an evaporator is formed for carrying out defrosting on the evaporator. The refrigerator evaporator defrosting method has the advantages that in the halting state of the refrigeration system, the rising degree of the temperature of the cold storage chamber is judged, the cold storage fan is automatically started, the air circulation between the cold storage chamber and the evaporator is formed, and warm air flow of the cold storage chamber can be utilized for carrying out defrosting on the evaporator, so the evaporator can realize automatic defrosting, the additional increase of defrosting components is not needed, and the manufacturing cost and the energy consumption are effectively reduced.
Description
Technical field
The present invention relates to refrigeration technology field, more specifically, relate to a kind of evaporator of refrigerator defrosting method.
Background technology
Along with the raising day by day of people's living standard, consumer is more and more higher to the quantity and quality requirement that are stored in food in refrigerator, and the refrigerator of large volume, many warm areas is subject to pursuing of market gradually.But, hydrone from the hydrone evaporated in food and outside air flows through the evaporimeter of refrigeration system in refrigerating chamber during by air channel, the often frosting on the surface of evaporimeter gradually due to plunging of temperature, the thermal conductivity extreme difference of frost layer, the heat that can affect in evaporimeter and refrigerating chamber changes rate, also can increase the load of compressor, cause the temperature in refrigerating chamber to be difficult to decline.
In order to solve the problem, the evaporimeter in refrigeration system needs periodically to carry out defrost.Wind cooling refrigerator is in the market generally realize automatic defrosting function by installing Defrost heater on an evaporator.During automatic defrosting, refrigeration system quits work, and Defrost heater is connected and started heating and carries out heating defrosting to evaporimeter, and defrost water is discharged outside case by the discharge outlet in refrigerator compartment.Until when meeting the predetermined exit criteria of refrigerator program, Defrost heater disconnects, and refrigeration system recovers normal work.But, needs in above-mentioned defrost process to pre-install Defrost heater on an evaporator, add manufacturing cost and manufacturing process, and during defrosting, the power of Defrost heater is comparatively large, adds the energy consumption of refrigerator.
In order to defrost to evaporimeter, disclose the refrigerator that another kind possesses defrosting function in prior art, connecting and composing refrigerant-cycle systems in turn with compressor, condenser, capillary, evaporimeter and muffler; And cross-over connection defrost branch road, is arranged in series magnetic valve in defrost branch road between the entrance and the entrance of evaporimeter of condenser, magnetic valve has two slaved operations of opening and closing, and with the unlatching of magnetic valve for system defrost duty.The method that this invention provides is, by defrost branch road, evaporimeter short circuit is entered compressor air-discharging, and the characteristic that when utilizing compressor operating, delivery temperature is higher carries out defrost to evaporimeter.Although the automatic defrosting system that this invention provides does not need Defrost heater to carry out automatic defrosting to evaporimeter, need to establish a set of special defrost branch road of structure.Adds additional the parts such as magnetic valve, and during defrosting, need startup compressor to be exhausted heating, add the energy consumption of system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of evaporator of refrigerator defrosting method is provided, automatic defrosting can be carried out to evaporimeter, additionally need not increase defrosting components again, effectively reduce manufacturing cost and energy consumption.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of evaporator of refrigerator defrosting method, comprises the following steps,
S1: under refrigeration system open state, when temperature of refrigerating chamber drops to default shutdown temperature, stops refrigeration system and closes refrigeration blower fan.Under the open state of refrigeration system, refrigerating chamber is continued refrigeration, thus room temperature constantly declines; when refrigerating chamber room temperature drops to default shutdown temperature; close described refrigeration system, to guarantee that temperature of refrigerating chamber is not less than default lower limit, avoid food too freezing.After refrigeration system is shut down; the room temperature of refrigerating chamber is gone up gradually; the evaporator surface frosting of low-temperature condition can be still in from the hydrone evaporated in the moisture of outside air and food; along with the continuation of refrigerating chamber room temperature is gone up; moisture in food continues evaporation, and the vapor content of refrigerating chamber is constantly increased, thus also directly causes the frosting degree aggravation of evaporator surface; in order to defrost to evaporimeter, just need to carry out step S2.
S2: under refrigeration system stopped status, when temperature of refrigerating chamber rises to default refrigerating chamber defrost temperature, refrigeration fan starting, forms the air circulation between refrigerating chamber and evaporimeter, to carry out defrost to evaporimeter.When temperature of refrigerating chamber is higher than the refrigerating chamber defrost temperature preset, also just mean that now evaporimeter arrives certain frosting degree, by starting described refrigeration blower fan, under the pressure of refrigeration blower fan, stream of warm air in refrigerating chamber, to described refrigeration evaporator, utilizes the warm air of refrigerating chamber to defrost to evaporimeter.Simultaneously, in above process, stream of warm air can meet cold cooling through evaporimeter, and is again back to refrigerating chamber, thus the remaining cold of evaporimeter can be utilized to freeze to refrigerating chamber.Further, a part can enter to refrigerating chamber with the cold air of described backflow after the white heat gasification of evaporator surface, supplements, contribute to the fresh-keeping of food to the humidity of refrigerating chamber.
Therefore; the present invention judges the rising degree of temperature of refrigerating chamber under refrigeration system stopped status; the described refrigeration blower fan of automatic startup; air between formation refrigerating chamber and evaporimeter is circulated; just the current of warm air of refrigerating chamber can be utilized to defrost to evaporimeter; therefore can carry out automatic defrosting to refrigeration evaporator, additionally need not increase defrosting components again, effectively reduce manufacturing cost and energy consumption.
Further, step S2 is specially, under refrigeration system stopped status; when temperature of refrigerating chamber rises to default refrigerating chamber defrost temperature; and the temperature of evaporimeter lower than the evaporimeter defrost temperature preset time, refrigeration fan starting, forms the air circulation between refrigerating chamber and evaporimeter.
Further, also comprise step S3, when the temperature of evaporimeter rises to described default evaporimeter defrost temperature, refrigeration blower fan stops defrost.
Further, also comprise step S4, under refrigeration system stopped status, when temperature of refrigerating chamber rises to default turn-on temperature, open refrigeration system and start refrigeration blower fan, impelling temperature of refrigerating chamber to decline, and get back to described step S1.
Compared with prior art, the invention has the beneficial effects as follows:
A kind of evaporator of refrigerator defrosting method of the present invention judges the rising degree of temperature of refrigerating chamber under refrigeration system stopped status; the described refrigeration blower fan of automatic startup; air between formation refrigerating chamber and evaporimeter is circulated; just the current of warm air of refrigerating chamber can be utilized to defrost to evaporimeter; therefore automatic defrosting can be carried out to evaporimeter; additionally defrosting components be need not increase again, effectively manufacturing cost and energy consumption reduced.
In the process of automatic defrosting, the stream of warm air in refrigerating chamber can meet cold cooling through refrigeration evaporator, and is again back to refrigerating chamber, thus the remaining cold of refrigeration evaporator can be utilized to freeze to refrigerating chamber.
In addition, in the process of automatic defrosting, a part can enter to refrigerating chamber with the cold air of described backflow after the white heat gasification on refrigeration evaporator surface, supplements, contribute to the fresh-keeping of food to the humidity of refrigerating chamber.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of refrigerator of the present invention.
Fig. 2 is the operation schematic diagram of a kind of cold compartment of refrigerator defrosting method of the present invention.
Fig. 3 ~ Fig. 6 is the control flow chart of the present invention program.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further illustrated.Wherein, accompanying drawing only for exemplary illustration, expression be only schematic diagram, but not pictorial diagram, can not be interpreted as the restriction to this patent; In order to better embodiments of the invention are described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; For a person skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
As shown in Figure 1, a kind of evaporator of refrigerator defrosting method, first presets the shutdown temperature T5 of refrigeration system 20, presets refrigerating chamber defrost temperature T2, and T5 < T2, the transient temperature of refrigeration temperature-sensing probe 27 is Tt.It should be noted that, T5 requires the minimum temperature of refrigerating chamber according to chilled food and presets, and equally, T2 also presets according to the actual conditions of refrigerator, not fixed numbers.In addition, in actual applications, generally also be provided with refrigerator control system (not shown in FIG.) in casing 100, refrigeration temperature-sensing probe 27 is sent to refrigerator control system refrigerating chamber 10 temperature data detected, and controls the start and stop of refrigeration system 20 and refrigeration blower fan 21 by refrigerator control system.
Composition graphs 2 and Fig. 3, the defrosting method step of the present embodiment is as follows:
S1: under refrigeration system 20 open state; when the temperature Tt that refrigeration temperature-sensing probe 27 detects refrigerating chamber 10 drops to default shutdown temperature T5; namely during Tt≤T5; stop refrigeration system and close refrigeration blower fan 21; to guarantee that refrigerating chamber 10 temperature is not less than default lower limit, avoid food too freezing.
S2: under refrigeration system 20 stopped status; now because refrigeration system 20 is shut down; the room temperature of refrigerating chamber 10 is gone up gradually; the surperficial frosting of evaporimeter 22 of low-temperature condition can be still in from the hydrone evaporated in the moisture of outside air and food; along with the continuation of refrigerating chamber 10 room temperature is gone up; moisture in food continues evaporation; the vapor content of refrigerating chamber 10 is constantly increased; thus also directly causing the frosting degree aggravation on evaporimeter 22 surface, the temperature Tt detecting refrigerating chamber 10 when refrigeration temperature-sensing probe 27 rises to default refrigerating chamber defrost temperature
t2time, namely during Tt>=T2, refrigeration blower fan 21 starts, and forms the air circulation between refrigerating chamber 10 and evaporimeter 22.
It should be noted that, during Tt >=T2, also just mean that now evaporimeter 22 arrives certain frosting degree, by starting described refrigeration blower fan 21, under the pressure of refrigeration blower fan 21, stream of warm air in refrigerating chamber 10, to described evaporimeter 22, utilizes the warm air of refrigerating chamber 10 to defrost to evaporimeter 20.Meanwhile, in above process, stream of warm air can meet cold cooling through evaporimeter 20, and is again back to refrigerating chamber 10, thus the remaining cold of evaporimeter 20 can be utilized to freeze to refrigerating chamber 10.Further, a part can enter to refrigerating chamber 10 with the cold air of described backflow after the white heat gasification on evaporimeter 20 surface, supplements, contribute to the fresh-keeping of food to the humidity of refrigerating chamber 10.
Therefore; the present invention judges the rising degree of temperature of refrigerating chamber under refrigeration system stopped status; the described refrigeration blower fan 21 of automatic startup; air between formation refrigerating chamber 10 and evaporimeter 22 is circulated; just the current of warm air of refrigerating chamber 10 can be utilized to defrost to evaporimeter 22; therefore can carry out automatic defrosting to evaporimeter 22, additionally need not increase defrosting components again, effectively reduce manufacturing cost and energy consumption.
Perfect further as to the present embodiment, as shown in Figure 1, evaporimeter 22 is provided with refrigeration defrosting sensor 26, and presets evaporimeter defrost temperature
t3, refrigeration defrosting sensor 26 can be sent to refrigerator control system the temperature data of evaporimeter 22 equally, and controls by refrigerator control system the start and stop that refrigeration hides blower fan 21, and the transient temperature of refrigeration defrosting sensor 26 is Tn.
And; as shown in Figure 4; step S2 is specially; under refrigeration system 20 stopped status; the temperature Tt detecting refrigerating chamber 10 when refrigeration temperature-sensing probe 27 rises to default trigger temperatures T2, and when the temperature that refrigeration defrosting sensor 26 detects evaporimeter 22 is lower than default evaporimeter defrost temperature T3, namely Tt >=T2 and Tn < T3 time; refrigeration blower fan 21 starts, and forms the air circulation between refrigerating chamber 10 and evaporimeter 22.
It should be noted that, when evaporimeter 22 is in enough low temperature, allow the hydrone being originally in high temperature lower the temperature rapidly, make hydrone when larger temperature fall rapidly in the surperficial frosting of evaporimeter 22, and this condition can relatively judging by Tn and T3.
Therefore, in the present embodiment, as shown in the cycle n1 in Fig. 2, as Tt >=T2 and Tn < T3 time, refrigeration blower fan 21 start, start to carry out circulated air defrost to evaporimeter 22; That is, as Tt >=T2 and Tn < T3 time, on evaporimeter 22, frosting degree is comparatively serious, and the temperature in refrigerating chamber 10 reaches enough high level, the high-temperature gas in refrigerating chamber 10 now just in time can be utilized to carry out defrost to evaporimeter 22, the effect of its defrost is best, and the most necessary and timely.
Correspondingly, as shown in the cycle n2 in Fig. 2, as Tt >=T2 and Tn >=T3 time, the temperature of evaporimeter 22 is in relative high state of value, thus can think that the frosting degree on evaporimeter 22 surface is lower, does not now need to start refrigeration blower fan 21 pairs of evaporimeters 22 and carries out defrost work, thus the frequent starting of defrosting function can be avoided, thus the refrigerating chamber 10 temperature frequent fluctuation that causes because of circulated air defrost can be avoided, be conducive to the preservation of food in refrigerating chamber 10, prevent the loss of food nutrient.
It should be noted that, T3 also presets according to the actual service condition of evaporimeter 22, not fixed numbers.
Also it should be noted that, in accompanying drawing 2, the situation shown in cycle n1 and cycle n2 may be simple subprogram, is also likely random hocketing.
As to the present embodiment supplement further and perfect; shown in composition graphs 2 and Fig. 5; preset the turn-on temperature T1 of refrigeration system 20; and comprise step S4, under refrigeration system 20 stopped status, when the temperature Tt that refrigeration temperature-sensing probe 27 detects refrigerating chamber 10 rises to default turn-on temperature; namely during Tt >=T1; open refrigeration system 20 and start refrigeration blower fan 21, impelling refrigerating chamber 10 temperature to decline, and get back to described step S1.Along with the temperature of refrigerating chamber constantly rises, as Tt >=T1, mean the temperature drift in refrigerating chamber 10, now start refrigeration system 20 and refrigerating chamber 10 is freezed, can enough low refrigerated storage temperature be ensured, avoid the room temperature because of refrigerating chamber 10 too high and cause food spoilage.But, follow-uply just can come back to step S1.
As to the present embodiment supplement further and perfect, shown in composition graphs 2 and Fig. 6, also comprise step S3, when the temperature that refrigeration defrosting sensor 26 detects evaporimeter 22 rises to default evaporimeter defrost temperature T3, namely, during Tn >=T3, refrigeration blower fan stops defrost.That is, under the pressure of refrigeration blower fan 21, evaporimeter 22 continues by defrost, its surface temperature also continues to rise, until during Tn >=T3, can judge that the frost layer on evaporimeter 22 surface is fully melted, now refrigerate blower fan 21 just can stop, automatically stop defrost to realize refrigeration blower fan.Similarly, after completing steps S3, proceed step S4, along with the temperature of refrigerating chamber constantly rises, as Tt >=T1, start refrigeration system 20 pairs of refrigerating chambers 10 and freeze, and come back to step S1.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (4)
1. an evaporator of refrigerator defrosting method, is characterized in that, comprises the following steps,
S1: under refrigeration system open state, when temperature of refrigerating chamber drops to default shutdown temperature, stops refrigeration system and closes refrigeration blower fan;
S2: under refrigeration system stopped status, when temperature of refrigerating chamber rises to default refrigerating chamber defrost temperature, refrigeration fan starting, forms the air circulation between refrigerating chamber and evaporimeter, to carry out defrost to evaporimeter.
2. evaporator of refrigerator defrosting method according to claim 1; it is characterized in that; step S2 is specially; under refrigeration system stopped status; when temperature of refrigerating chamber rises to default refrigerating chamber defrost temperature; and the temperature of evaporimeter lower than the evaporimeter defrost temperature preset time, refrigeration fan starting, forms the air circulation between refrigerating chamber and evaporimeter.
3. evaporator of refrigerator defrosting method according to claim 2, is characterized in that, also comprise step S3, and when the temperature of evaporimeter rises to described default evaporimeter defrost temperature, refrigeration blower fan stops defrost.
4. evaporator of refrigerator defrosting method according to claim 1; it is characterized in that; also comprise step S4; under refrigeration system stopped status; when temperature of refrigerating chamber rises to default turn-on temperature; open refrigeration system and start refrigeration blower fan, impelling temperature of refrigerating chamber to decline, and get back to described step S1.
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| CN201410579625.8A CN104329872A (en) | 2014-10-24 | 2014-10-24 | Refrigerator evaporator defrosting method |
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| CN201410579625.8A CN104329872A (en) | 2014-10-24 | 2014-10-24 | Refrigerator evaporator defrosting method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650981A (en) * | 2016-02-04 | 2016-06-08 | 青岛海尔股份有限公司 | Refrigerator |
| CN107289707A (en) * | 2016-03-31 | 2017-10-24 | 青岛海尔智能技术研发有限公司 | Wind cooling refrigerator |
| CN107477973A (en) * | 2017-08-28 | 2017-12-15 | 合肥华凌股份有限公司 | Blower control method, system and refrigerator |
| CN108800715A (en) * | 2018-06-19 | 2018-11-13 | 海信（山东）冰箱有限公司 | Refrigeration equipment and control method |
| CN109442785A (en) * | 2018-10-30 | 2019-03-08 | 海信容声(广东)冰箱有限公司 | Refrigeration equipment and control method |
| CN111351310A (en) * | 2020-03-25 | 2020-06-30 | 合肥美的电冰箱有限公司 | Refrigeration equipment, defrosting control method and device thereof, and storage medium |
| CN111765688A (en) * | 2015-07-28 | 2020-10-13 | Lg 电子株式会社 | Refrigerator with a door |
| CN113028732A (en) * | 2021-04-07 | 2021-06-25 | 创维电器股份有限公司 | Defrosting control logic method based on refrigerating box |
| CN113587539A (en) * | 2021-07-30 | 2021-11-02 | 松下电器研究开发(苏州)有限公司 | Defrosting control method and refrigerator |
| CN113883800A (en) * | 2021-10-28 | 2022-01-04 | 澳柯玛股份有限公司 | Refrigeration and defrosting control method of double-system refrigeration refrigerator |
| CN115406161A (en) * | 2022-08-31 | 2022-11-29 | 珠海格力电器股份有限公司 | Evaporator defrosting judgment method, control device and refrigerator |
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| US11578903B2 (en) | 2015-07-28 | 2023-02-14 | Lg Electronics Inc. | Refrigerator |
| CN111765688A (en) * | 2015-07-28 | 2020-10-13 | Lg 电子株式会社 | Refrigerator with a door |
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| CN108800715A (en) * | 2018-06-19 | 2018-11-13 | 海信（山东）冰箱有限公司 | Refrigeration equipment and control method |
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| CN109442785A (en) * | 2018-10-30 | 2019-03-08 | 海信容声(广东)冰箱有限公司 | Refrigeration equipment and control method |
| CN111351310A (en) * | 2020-03-25 | 2020-06-30 | 合肥美的电冰箱有限公司 | Refrigeration equipment, defrosting control method and device thereof, and storage medium |
| CN113028732A (en) * | 2021-04-07 | 2021-06-25 | 创维电器股份有限公司 | Defrosting control logic method based on refrigerating box |
| CN113587539A (en) * | 2021-07-30 | 2021-11-02 | 松下电器研究开发(苏州)有限公司 | Defrosting control method and refrigerator |
| CN113883800A (en) * | 2021-10-28 | 2022-01-04 | 澳柯玛股份有限公司 | Refrigeration and defrosting control method of double-system refrigeration refrigerator |
| CN113883800B (en) * | 2021-10-28 | 2023-03-14 | 澳柯玛股份有限公司 | Refrigeration and defrosting control method of double-system refrigeration refrigerator |
| CN115406161A (en) * | 2022-08-31 | 2022-11-29 | 珠海格力电器股份有限公司 | Evaporator defrosting judgment method, control device and refrigerator |
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