CN114812051B - Refrigerator and defrosting control method for evaporator of refrigerator - Google Patents
Refrigerator and defrosting control method for evaporator of refrigerator Download PDFInfo
- Publication number
- CN114812051B CN114812051B CN202210577463.9A CN202210577463A CN114812051B CN 114812051 B CN114812051 B CN 114812051B CN 202210577463 A CN202210577463 A CN 202210577463A CN 114812051 B CN114812051 B CN 114812051B
- Authority
- CN
- China
- Prior art keywords
- evaporator
- defrosting
- temperature
- air
- air flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 151
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 230000001276 controlling effect Effects 0.000 claims description 25
- 230000000875 corresponding effect Effects 0.000 claims description 9
- 230000002596 correlated effect Effects 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 abstract description 3
- 230000008595 infiltration Effects 0.000 abstract description 3
- 238000001764 infiltration Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000007710 freezing Methods 0.000 description 16
- 230000008014 freezing Effects 0.000 description 16
- 238000005057 refrigeration Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
Landscapes
- 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 provides a refrigerator and an evaporator defrosting control method thereof, wherein the refrigerator comprises a refrigerator body, a first space is arranged in the refrigerator body, an evaporator and a first defrosting heater positioned at the bottom of the first space are arranged in the first space, an airflow driving part is arranged in the top area of the first space, and the airflow driving part can drive hot airflow formed by heating the first defrosting heater to flow from the bottom of the evaporator to the top of the evaporator and then guide the hot airflow to the evaporator again. According to the invention, the first defrosting heater and the airflow driving part are respectively positioned at the bottom area and the top area of the first defrosting heater, so that the ascending of the hot airflow and the driving circulation of the airflow driving part on the hot airflow can be utilized to ensure the upper and lower temperature balance in the first space, the defrosting duration of the evaporator can be effectively reduced, the radiation and infiltration of heat in the first space into a storage room adjacent to the first space can be effectively reduced, and the temperature fluctuation in the storage room can be reduced.
Description
Technical Field
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a refrigerator and an evaporator defrosting control method thereof.
Background
Most of household refrigerators are single-system air-cooled frostless refrigerators, and evaporators are arranged at the rear parts of freezing chambers and assembled through components such as a fan housing, a fan, an air duct, an air door and the like to form a structure for circulating cold air in the refrigerator. When the refrigerating chamber and the refrigerating chamber of the refrigerator have refrigeration requirements, cold air is respectively sent into the refrigerating chamber and the refrigerating chamber by the refrigerating chamber through the operation of a fan to cool. When the refrigerating requirement of the refrigerating chamber is met, the refrigerating requirement is met, the refrigerating capacity is regulated by controlling the opening and closing of the air door, and when the refrigerating requirement is met, the air door is closed, so that the freezing temperature is prevented from being too low.
The evaporator frosts in the running process, and the defrosting action is carried out when the conditions are met, and an electric heating defrosting method is generally adopted at present, namely a defrosting heater is arranged at the lower part of the evaporator to heat defrosting, at the moment, a damper is closed, so that heat is prevented from overflowing into a refrigerating (freezing) chamber, and the food quality is reduced. In the conventional structure, the defrosting heater heats the lower part of the evaporator, and the heat slowly melts the frost from bottom to top, which takes about 40 to 60 minutes. The time difference between the bottom and top frost layers of the evaporator melting completely is "slow down of melting frost", and the whole process of defrosting of the evaporator 4 takes about 40 minutes. When defrosting is terminated, the temperature difference between the top and the bottom of the evaporator is larger, and the temperature difference is up to 65.5 ℃. The heat of defrosting hot air is radiated into the freezing chamber, so that the temperature of the freezing chamber rises, and the temperature rise speed of the freezing chamber gradually increases. The actual temperature of each compartment of the refrigerator fluctuates in a certain range, but the temperature impact of the freezing chamber during defrosting is very large. As the heat from the defrosting process is concentrated at the top of the evaporator, it seeps in from the freezer compartment air outlet and radiates from the compartment walls, causing the air outlet temperature to fluctuate from-24 ℃ to 0 ℃, the freezer compartment box temperature to rise from-20 ℃ to-12 ℃ and back to 8 ℃.
As described above, the actual temperature control of the refrigerator is somewhat fluctuated throughout the entire refrigeration process, and particularly, the heat input by the electric heating is defrosted during the defrosting process, which tends to cause a somewhat fluctuated temperature of the freezing chamber and the refrigerating chamber.
The above repeated fluctuation impact of defrosting temperature causes the following problems:
1. the temperature of the air outlet is repeatedly impacted between-18 ℃ and 0 ℃, the food is repeatedly thawed and frozen, the meat tissue is damaged, the nutrition loss is more, and the fresh-keeping effect is poor.
2. The defrosting time is too long, the upper temperature difference of the evaporator is 60 ℃, the lower half part of the evaporator is completely defrosted in the later defrosting stage, but the lower part of the evaporator is still heated due to structural limitation, and the upper half part is not completely defrosted. Excessive heat of the defrosting heater is accumulated on the upper part of the air duct of the freezing chamber (floating accumulation is caused by light density), and most of cold is output to the air duct of the evaporator of the freezing chamber for precooling and cooling in the next refrigerating process, so that the refrigerating and cooling speed is influenced and excessive electric quantity is consumed.
Disclosure of Invention
Therefore, the refrigerator and the defrosting control method for the evaporator thereof can overcome the defects that in the related art, the defrosting time is too long due to uneven heating of the bottom and the top of the evaporator, heat enters a storage compartment of the refrigerator adjacent to the refrigerator, and the fluctuation of the temperature of the storage compartment is large.
In order to solve the problems, the invention provides a refrigerator, which comprises a refrigerator body, wherein a first space is arranged in the refrigerator body, an evaporator and a first defrosting heater arranged at the bottom of the first space are arranged in the first space, an airflow driving part is arranged at the top area of the first space, and the airflow driving part can drive hot airflow formed by heating the first defrosting heater to flow from the bottom of the evaporator to the top of the evaporator and then guide the hot airflow to the evaporator again.
In some embodiments, the airflow driving component comprises an air duct and a rotary fan blade positioned in the air duct, the air duct is provided with an air inlet and an air outlet, the air inlet is arranged in the top area, and the air outlet is arranged corresponding to a heat exchange core of the evaporator; and/or, the airflow driving component is a centrifugal fan.
In some embodiments, an air flow distribution structure is disposed at the air outlet, and the air flow distribution structure can distribute the air flow output by the air outlet to the heat exchange core.
In some embodiments, the airflow distribution structure comprises a plurality of branch pipes communicated with the air outlets, and each branch pipe is provided with a plurality of air outlets.
In some embodiments, a plurality of the branch pipes are sequentially arranged at intervals from the top to the bottom of the evaporator, and the pore diameter of the air outlet of each branch pipe is smaller from the top to the bottom of the evaporator, and/or the air outlet of each branch pipe is larger from the top to the bottom of the evaporator (102).
In some embodiments, a second defrosting heater is arranged in the air outlet.
In some embodiments, the heating power of the second defrosting heater can be adjusted according to the air flow temperature of the air inlet, and the heating power is inversely related to the air flow temperature of the air inlet; and/or the rotating speed of the rotating fan blade is positively correlated with the air flow temperature of the air inlet.
The invention also provides an evaporator defrosting control method for controlling the refrigerator, which comprises the following steps:
acquiring a control instruction;
and when the control instruction is a defrosting instruction, controlling the first defrosting heater to operate and heat and controlling the airflow driving part to rotate.
In some embodiments, when the refrigerator further includes a second defrosting heater and the control command is a defrosting command,
the second defrosting heater is also controlled to operate and heat.
In some embodiments, during the second defrosting heater operating heating, further comprising acquiring a real-time temperature of the air flow of the air intake of the air flow driving part;
judging the relative relation between the real-time temperature of the air flow and a preset temperature interval;
and controlling and adjusting the operation power of the second defrosting heater according to the relative magnitude relation.
In some embodiments of the present invention, in some embodiments,
the preset temperature intervals are multiple, the preset temperature intervals at least comprise a first temperature interval and a second temperature interval, wherein the highest temperature of the first temperature interval is unequal to the highest temperature of the second temperature interval and is continuous according to preset precision,
when the real-time temperature of the air flow is lower than the lowest temperature of the first temperature interval, controlling the second defrosting heater to perform full-power operation heating; or alternatively, the process may be performed,
when the real-time temperature of the air flow is in the first temperature interval, controlling the second defrosting heater to operate and heat at a first power; or alternatively, the process may be performed,
when the real-time temperature of the air flow is in the second temperature interval, controlling the second defrosting heater to operate and heat at a second power; or alternatively, the process may be performed,
when the real-time temperature of the air flow is higher than the highest temperature of the second temperature interval, controlling the second defrosting heater to operate and heat at third power, and controlling the first defrosting heater to stop operating and heating, wherein the first power, the second power and the third power are smaller and smaller.
In some embodiments of the present invention, in some embodiments,
and when the second defrosting heater is operated and heated at the third power, synchronously controlling the air flow driving part to operate at the highest rotating speed.
In some embodiments of the present invention, in some embodiments,
and the defrosting period of the evaporator further comprises the step of acquiring the real-time room temperature of the first space, and when the real-time room temperature rises by a preset temperature difference in a preset time, the evaporator is controlled to withdraw from defrosting.
According to the refrigerator and the defrosting control method for the evaporator, the first defrosting heater and the airflow driving component are respectively arranged in the bottom area and the top area of the first defrosting heater, the ascending of the airflow and the driving circulation of the airflow driving component on the airflow can be utilized to ensure the upper temperature and the lower temperature balance in the first space, so that the defrosting process of the upper area and the lower area of the evaporator is balanced, the defrosting duration of the evaporator can be effectively reduced, the radiation and the infiltration of heat in the first space into a storage room adjacent to the first space can be effectively reduced, and the temperature fluctuation in the storage room is reduced.
Drawings
Fig. 1 is a schematic view of an internal structure of a refrigerator according to an embodiment of the present invention (arrows in the figure show a circulation direction of air flow);
fig. 2 is a schematic view of a part of the structure in fig. 1.
The reference numerals are expressed as:
10. a refrigerator body; 101. a first space; 1011. a drain hole; 102. an evaporator; 103. a first defrosting heater; 104. an air flow driving part; 1041. an air duct; 1042. rotating the fan blade; 1043. an air inlet; 105. a first temperature sensor; 201. a branch pipe; 202. an air outlet; 30. a second defrosting heater; 41. a freezing chamber; 42. a refrigerating fan; 43. an air inlet of the freezing chamber; 44. an air outlet of the freezing chamber; 51. a refrigerating chamber; 52. an air inlet of the refrigerating chamber; 53. an air outlet of the refrigerating chamber; 6. a compressor.
Detailed Description
Referring to fig. 1 to 2 in combination, according to an embodiment of the present invention, there is provided a refrigerator including a refrigerator body 10, wherein the refrigerator body 10 has a first space 101 therein, and in particular, the first space 101 is generally disposed adjacent to a freezing chamber 41, an evaporator 102 and a first defrosting heater 103 (may be referred to as a main defrosting heater) disposed at a bottom thereof are disposed in the first space 101, an air flow driving part 104 is disposed at a top region of the first space, and the air flow driving part 104 is capable of driving a hot air flow formed by heating the first defrosting heater 103 to flow from a bottom of the evaporator 102 to a top thereof and then guiding the hot air flow onto the evaporator 102 again. In this technical solution, the first defrosting heater 103 and the airflow driving part 104 are respectively located in the bottom area and the top area of the first defrosting heater 103, so that the ascending of the hot airflow and the driving cycle of the airflow driving part 104 to the hot airflow can be utilized to ensure the uniformity of the upper temperature and the lower temperature in the first space 101, so that the defrosting process of the upper area and the lower area of the evaporator 102 is balanced, and further the defrosting duration of the evaporator 102 can be effectively reduced, so that the radiation and the infiltration of the heat in the first space 101 into the adjacent storage compartments (such as the freezing chamber 41, the refrigerating chamber 51 and the like in some cases) can be effectively reduced, and the temperature fluctuation in the storage compartments is reduced.
In some embodiments, the airflow driving component 104 includes an air duct 1041 and a rotating fan 1042 located in the air duct 1041, the air duct 1041 has an air inlet 1043 and an air outlet, the air inlet 1043 is adaptively disposed in a top area, and the air outlet is disposed corresponding to a heat exchange core of the evaporator 102. In a specific embodiment, the airflow driving component 104 is a centrifugal fan, where the casing of the centrifugal fan is at least one part of the air duct 1041, and the centrifugal fan can fully utilize the space layout of the first space 101, so that the internal structure is more reasonable.
In some embodiments, the air outlet is provided with an air flow distribution structure, the air flow output by the air outlet can be distributed in the heat exchange core part by the air flow distribution structure, and the hot air flowing out of the air outlet can be distributed more reasonably in the height range of the evaporator 102 by the air flow distribution structure, so that the defrosting of the evaporator 102 in the height direction is kept synchronous, and the phenomenon that the defrosting at the bottom is not performed at the top is effectively prevented. The airflow distribution structure comprises a plurality of branch pipes 201 communicated with the air outlets, each branch pipe 201 is provided with a plurality of air outlets 202, and the length of each branch pipe 201 is matched with the heat exchange core of the corresponding part, so that the hot airflow at the spraying position can cover the whole heat exchange core of the evaporator 102.
The multiple branch pipes 201 are sequentially arranged at intervals from the top to the bottom of the evaporator 102, and the aperture of the air outlet 202 of each branch pipe 201 is smaller from the top to the bottom of the evaporator 102, that is, the aperture of the air outlet 202 near the top area of the evaporator 102 is larger, and/or the air outlet 202 of each branch pipe 201 is larger from the top to the bottom of the evaporator 102, so that the heat requirement of top defrosting can be ensured, and the whole defrosting duration can be shortened.
In some embodiments, the second defrosting heater 30 is disposed in the air outlet, specifically, the second defrosting heater 30 may be composed of a plurality of PTC heating assemblies connected in parallel, the second defrosting heater 30 can assist the first defrosting heater 103 to provide heat required by defrosting, and the second defrosting heater 30 is disposed in the air outlet to assist in heating circulating air flow, so that the bottom and the top of the evaporator 102 are heated simultaneously, which is beneficial to improving the temperature balance of the evaporator 102 and guaranteeing the synchronism of defrosting up and down. The heating power of the second defrosting heater 30 can be adjusted according to the air flow temperature of the air inlet 1043, and the heating power is inversely related to the air flow temperature of the air inlet 1043, that is, the higher the air flow temperature of the air inlet 1043 is, the smaller the heating power of the second defrosting heater 30 is, whereas the lower the air flow temperature of the air inlet 1043 is, the larger the heating power of the second defrosting heater 30 is, which is beneficial to accelerating the defrosting efficiency of the evaporator 102 and shortening the defrosting duration.
In a specific embodiment, the rotation speed of the rotating fan 1042 is positively related to the airflow temperature of the air inlet 1043, specifically, the higher the airflow temperature of the air inlet 1043 is, the higher the rotation speed is, so that heat can be guaranteed to flow in the first space 101 more efficiently, and the heat is more balanced, which is beneficial to accelerating the defrosting process.
According to an embodiment of the present invention, there is also provided an evaporator defrosting control method for controlling the above refrigerator, including the steps of:
acquiring a control instruction;
when the control instruction is a defrosting instruction (the defrosting instruction may be an instruction selected by a user through a corresponding control component or an instruction sent after the internal logic of the controller is judged, which is not described in detail in the present disclosure as a known matter), the first defrosting heater 103 is controlled to operate and heat, and the airflow driving component 104 is controlled to rotate (specifically, for example, the rotating fan blade 1042 is controlled).
In this technical solution, when the refrigerator receives the defrosting instruction, the first defrosting heater 103 and the airflow driving component 104 are controlled to operate simultaneously, so that heat at the bottom can reach the top area of the evaporator 102 more quickly and form an effective cycle, thereby improving the defrosting effect of the top area of the evaporator 102, and effectively preventing the temperature fluctuation phenomenon of the storage room caused by the defrosting duration extension of the first space 101 due to the fact that the bottom of the evaporator is defrosted but the top is not defrosted later in the prior art.
In some embodiments, when the refrigerator further includes the second defrosting heater 30 and the control command is a defrosting command, the second defrosting heater 30 is also controlled to operate heating. By operating the second defrosting heater 30, the temperature of the top region of the evaporator 102 can be raised, and at the same time, the heat demand of defrosting can be satisfied, shortening the defrosting time period.
In some embodiments, during the heating period of the second defrosting heater 30, the method further comprises acquiring the real-time temperature of the air flow of the air inlet 1043 of the air flow driving part 104, specifically, acquiring the real-time temperature through the first temperature sensor 105; judging the relative relation between the real-time temperature of the air flow and a preset temperature interval; the operation power of the second defrosting heater 30 is controlled and adjusted according to the relative magnitude relation. In this way, the operation power of the second defrosting heater 30 can be related to the real-time temperature of the air flow of the air inlet 1043, so that the overall operation energy consumption of the refrigerator can be reduced. Specifically, the preset temperature intervals are multiple, and the multiple preset temperature intervals at least comprise a first temperature interval and a second temperature interval, wherein the highest temperature of the first temperature interval is not equal to the second temperature interval and is continuous according to preset precision (such as 1 ℃,0.5 ℃,0.1 ℃ and the like), and when the real-time temperature of the air flow is lower than the lowest temperature of the first temperature interval, the second defrosting heater 30 is controlled to perform full-power operation heating; alternatively, when the real-time temperature of the air flow is within the first temperature interval, the second defrosting heater 30 is controlled to operate heating at the first power; alternatively, when the real-time temperature of the air flow is within the second temperature interval, the second defrosting heater 30 is controlled to operate heating at the second power; or when the real-time temperature of the air flow is higher than the highest temperature of the second temperature interval, controlling the second defrosting heater 30 to operate and heat at the third power, and controlling the first defrosting heater 103 to stop operating and heat, wherein the first power, the second power and the third power are smaller and smaller.
Preferably, when the second defrosting heater 30 is operated to heat at the third power, the air flow driving part 104 is synchronously controlled to operate at the highest rotation speed, so that the hot air flow with higher temperature can efficiently circulate in the first space 101, and the defrosting efficiency can be ensured. The defrosting of the evaporator 102 further comprises the step of acquiring the real-time room temperature of the first space 101 (which is obtained by a second temperature sensor arranged in the first space 101), and controlling the evaporator 102 to withdraw from defrosting after the real-time room temperature rises by a preset temperature difference in a preset time.
The technical scheme of the invention is further described below in connection with a specific embodiment.
In the normal refrigerating process of the air-cooled refrigerator, the evaporator can be frosted gradually, and when the evaporator frosts to a certain thickness, the system is required to automatically defrost. The traditional refrigerator has the problems that the defrosting is carried out by using a defrosting heater only, the defrosting speed is low, the upper and lower temperature difference of an evaporator is large, the electric energy consumption is high, and the like.
The defrosting device (i.e. the related structure described above, which may specifically include the airflow driving component 104, the second defrosting heater 30, etc.) is installed at the upper middle position of the evaporator, and specifically, the defrosting device is formed by centrifugal fan blades (i.e. the rotating fan blades 1042 described above, the same applies below), an air inlet volute (i.e. the air duct 1041 described above, the same applies below), a heater (i.e. the second defrosting heater 30 described above), a hot air channel (i.e. the branch pipe 201 described above), a hot air outlet (i.e. the air outlet 202 described above), an air inlet temperature sensor (i.e. the first temperature sensor 105 described above), etc.
The hot air ports are respectively positioned at the middle upper part of the evaporator. The air in the evaporator cavity is heated by the centrifugal fan blades, hot air is sprayed onto the surface of the evaporator to defrost, and meanwhile, the air in the whole evaporator cavity is circulated, and the circulating air flow is utilized to defrost.
The specific implementation mode is as follows: the refrigerator detects that the defrosting condition is met.
The defrosting heater is started to work, and the centrifugal fan of the synchronous defrosting device is started to operate.
An inlet air temperature sensor on the spiral case of the defrosting device detects inlet air temperature. And controlling the gear of the heater (5 gears of power control are adopted for electric heating of the defrosting device, 1 gear of power is the lowest, and 5 gears of power is the highest) and the rotating speed of the adjustable centrifugal fan according to the detected air inlet temperature.
When the air inlet temperature T is less than or equal to 5 ℃ (corresponding to the lowest temperature lower than the first temperature interval) in the initial stage of defrosting, the frosting layer is thicker, the heat of the bottom heater cannot be transmitted to the middle upper part of the evaporator from bottom to top, and the collected air inlet temperature is lower. The defrosting device is electrically heated to be opened at full power of 100%, and rapidly heated air is sprayed to the frost layer from the air inlet to the hot air hole through the volute air channel, so that air flow circulation at the top and the bottom is accelerated.
The defrosting device detects that the air inlet temperature is 5 ℃ < T <15 ℃ (corresponding to being in a first temperature interval), the power of the heater is put into 50-60% gear operation, the heating power is properly reduced, and the temperature is maintained not to rise too fast;
the defrosting device detects that the air inlet temperature is 15 ℃ < T and less than or equal to 25 ℃ (corresponding to being in a second temperature interval), and the power input of the heater is 30-40% to operate. The detection of this temperature range indicates that the upper frost in the evaporator melts less and the hot gas rises to the top faster. The rotating speed of the centrifugal fan is increased by 20%, hot gas circulation is accelerated, and frost on the upper middle part of the evaporator is melted rapidly.
Because the frost is melted fast, the lag inertia influence of heat is avoided, the heat accumulation at the top of the evaporator is reduced, when the air inlet temperature is 25 ℃ < T less than or equal to 30 ℃ (corresponding to the highest temperature higher than the second temperature interval), the power input of the heater is 10% -20%, the centrifugal fan is operated at the highest rotating speed, the circulation cavity air is accelerated, and the waste heat of the hot air is utilized to defrost.
Meanwhile, the main defrosting heater of the refrigerator is turned off, the waste heat of the heated air is mainly utilized in the later period of the defrosting period, the air is sprayed for defrosting, and the energy of the heated air is fully utilized for defrosting. The evaporator cavity temperature sensor detects and satisfies for 1 minute continuously, and one minute temperature rise exceeds 3 ℃, and the frost layer is completely dissolved, and the cavity temperature rises fast (the T cavity is the temperature sensor installed at the evaporator and is mainly used for detecting the cavity problem, judging the basis of defrosting exit), and satisfies the defrosting exit condition, and the defrosting period is ended. At this time, the temperature of the whole evaporator cavity is about 10 ℃, the refrigerator starts the compressor to perform refrigeration operation again, the cavity is quickly cooled, the freezing chamber and the refrigerating chamber of the refrigerator are quickly restored to the original temperatures, and the problem of temperature fluctuation is reduced.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (11)
1. The refrigerator is characterized by comprising a refrigerator body (10), wherein a first space (101) is formed in the refrigerator body (10), an evaporator (102) and a first defrosting heater (103) arranged at the bottom of the first space are arranged in the first space (101), an airflow driving part (104) is arranged in the top area of the first space, and the airflow driving part (104) can drive a hot airflow formed by heating the first defrosting heater (103) to flow from the bottom of the evaporator (102) to the top of the evaporator and then guide the hot airflow to the evaporator (102) again; the airflow driving component (104) comprises an air duct (1041) and a rotary fan blade (1042) positioned in the air duct (1041), the air duct (1041) is provided with an air inlet (1043) and an air outlet, the air inlet (1043) is arranged in the top area, and the air outlet is arranged corresponding to a heat exchange core of the evaporator (102); an air flow distribution structure is arranged at the air outlet, and the air flow distribution structure can distribute the air flow output by the air outlet to the heat exchange core; the air flow distribution structure comprises a plurality of branch pipes (201) communicated with the air outlets, and each branch pipe (201) is provided with a plurality of air outlets (202).
2. The refrigerator according to claim 1, wherein the air flow driving part (104) is a centrifugal fan.
3. The refrigerator according to claim 1, wherein a plurality of the branch pipes (201) are arranged at intervals in order from the top to the bottom of the evaporator (102), and the diameters of the air outlets (202) respectively provided on each of the branch pipes (201) become smaller from the top to the bottom of the evaporator (102), and/or the air outlets (202) respectively provided on each of the branch pipes (201) become larger from the top to the bottom of the evaporator (102).
4. The refrigerator according to claim 1, characterized in that a second defrosting heater (30) is provided in the air outlet.
5. The refrigerator according to claim 4, characterized in that the heating power of the second defrosting heater (30) can be adjusted according to the air flow temperature of the air intake (1043), and the heating power is inversely related to the air flow temperature of the air intake (1043); and/or, the rotation speed of the rotating fan blade (1042) is positively correlated with the air flow temperature of the air inlet (1043).
6. An evaporator defrosting control method for controlling the refrigerator of any one of claims 1 to 5, characterized by comprising the steps of:
acquiring a control instruction;
when the control instruction is a defrosting instruction, the first defrosting heater (103) is controlled to operate heating, and the airflow driving part (104) is controlled to rotate.
7. The evaporator defrosting control method of a refrigerator according to claim 6, wherein when the refrigerator further includes a second defrosting heater (30) and the control command is a defrosting command,
the second defrosting heater (30) is also controlled to operate heating.
8. The method of controlling defrosting of an evaporator of a refrigerator according to claim 7, further comprising acquiring a real-time temperature of an air flow of an air intake (1043) of the air flow driving part (104) during the heating operation of the second defrosting heater (30);
judging the relative relation between the real-time temperature of the air flow and a preset temperature interval;
and controlling and adjusting the operation power of the second defrosting heater (30) according to the relative magnitude relation.
9. The method for controlling defrosting of an evaporator of a refrigerator according to claim 8, wherein,
the preset temperature intervals are multiple, the preset temperature intervals at least comprise a first temperature interval and a second temperature interval, wherein the highest temperature of the first temperature interval is unequal to the highest temperature of the second temperature interval and is continuous according to preset precision,
controlling the second defrosting heater (30) to perform full-power operation heating when the real-time temperature of the air flow is lower than the lowest temperature of the first temperature interval; or alternatively, the process may be performed,
controlling the second defrosting heater (30) to operate heating at a first power when the air flow real-time temperature is within the first temperature interval; or alternatively, the process may be performed,
controlling the second defrosting heater (30) to operate heating at a second power when the air flow real-time temperature is within the second temperature interval; or alternatively, the process may be performed,
when the real-time temperature of the air flow is higher than the highest temperature of the second temperature interval, the second defrosting heater (30) is controlled to operate and heat at third power, and the first defrosting heater (103) is controlled to stop operating and heating, wherein the first power, the second power and the third power are smaller and smaller.
10. The method for controlling defrosting of an evaporator of a refrigerator according to claim 9, wherein,
when the second defrosting heater (30) is operated and heated at the third power, the air flow driving part (104) is synchronously controlled to operate at the highest rotating speed.
11. The method for controlling defrosting of an evaporator of a refrigerator according to claim 6, wherein,
the defrosting period of the evaporator (102) further comprises the step of acquiring the real-time room temperature of the first space (101), and when the real-time room temperature rises by a preset temperature difference within a preset time, the evaporator (102) is controlled to withdraw from defrosting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210577463.9A CN114812051B (en) | 2022-05-25 | 2022-05-25 | Refrigerator and defrosting control method for evaporator of refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210577463.9A CN114812051B (en) | 2022-05-25 | 2022-05-25 | Refrigerator and defrosting control method for evaporator of refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114812051A CN114812051A (en) | 2022-07-29 |
| CN114812051B true CN114812051B (en) | 2023-04-25 |
Family
ID=82516340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210577463.9A Active CN114812051B (en) | 2022-05-25 | 2022-05-25 | Refrigerator and defrosting control method for evaporator of refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114812051B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117213658B (en) * | 2023-11-08 | 2024-02-13 | 深圳市千岩科技有限公司 | Warmer, temperature measuring method thereof, and corresponding device and medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325543A (en) * | 2020-11-26 | 2021-02-05 | 珠海格力电器股份有限公司 | Refrigerator, control method thereof, controller and computer-readable storage medium |
| CN213578297U (en) * | 2020-11-26 | 2021-06-29 | 珠海格力电器股份有限公司 | Refrigerator with a door |
| CN113048690A (en) * | 2019-12-26 | 2021-06-29 | 青岛海尔电冰箱有限公司 | Side by side combination refrigerator |
| CN114076466A (en) * | 2020-08-18 | 2022-02-22 | 青岛海尔电冰箱有限公司 | Air-cooled refrigerator with evaporator arranged at bottom of refrigerator body |
| CN114076468A (en) * | 2020-08-18 | 2022-02-22 | 青岛海尔电冰箱有限公司 | Refrigerator with evaporator arranged at bottom of refrigerator body |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205641752U (en) * | 2016-03-25 | 2016-10-12 | 青岛海尔股份有限公司 | Air -cooling refrigerator |
| CN106247742B (en) * | 2016-08-12 | 2018-09-18 | 长虹美菱股份有限公司 | A kind of refrigerator freezing fan defrosting device and its control method |
| CN206648401U (en) * | 2017-04-13 | 2017-11-17 | 六安职业技术学院 | Moisturizing control system is heated in air-cooled frost-free refrigerator frosting defrost |
| CN207214587U (en) * | 2017-09-18 | 2018-04-10 | 合肥美菱股份有限公司 | Cell structure between a kind of lifting wind cooling refrigerator compartment temperature uniformity |
| CN107421215A (en) * | 2017-09-19 | 2017-12-01 | 合肥美菱股份有限公司 | Cell structure and its control method between a kind of lifting wind cooling refrigerator compartment temperature uniformity |
| CN208312835U (en) * | 2018-04-25 | 2019-01-01 | 青岛海尔股份有限公司 | Dual system wind cooling refrigerator |
| CN109813029B (en) * | 2019-02-26 | 2021-06-29 | 合肥美的电冰箱有限公司 | Refrigerator and defrosting method thereof |
| CN111089446A (en) * | 2020-01-09 | 2020-05-01 | 青岛海尔电冰箱有限公司 | Air-cooled refrigerator |
| CN115127284A (en) * | 2022-07-07 | 2022-09-30 | 合肥美菱物联科技有限公司 | Refrigerator defrosting system and defrosting method |
-
2022
- 2022-05-25 CN CN202210577463.9A patent/CN114812051B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048690A (en) * | 2019-12-26 | 2021-06-29 | 青岛海尔电冰箱有限公司 | Side by side combination refrigerator |
| CN114076466A (en) * | 2020-08-18 | 2022-02-22 | 青岛海尔电冰箱有限公司 | Air-cooled refrigerator with evaporator arranged at bottom of refrigerator body |
| CN114076468A (en) * | 2020-08-18 | 2022-02-22 | 青岛海尔电冰箱有限公司 | Refrigerator with evaporator arranged at bottom of refrigerator body |
| CN112325543A (en) * | 2020-11-26 | 2021-02-05 | 珠海格力电器股份有限公司 | Refrigerator, control method thereof, controller and computer-readable storage medium |
| CN213578297U (en) * | 2020-11-26 | 2021-06-29 | 珠海格力电器股份有限公司 | Refrigerator with a door |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114812051A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101975498B (en) | Refrigerator | |
| CN106091566B (en) | A kind of control method for wind cooling refrigerator | |
| CN103335469B (en) | The control method of wind cooling refrigerator and wind cooling refrigerator | |
| CN101963437A (en) | Defrosting control system and control method of refrigerator | |
| CN109798713B (en) | Three-circulation air-cooled refrigerator and defrosting method thereof | |
| US20080148745A1 (en) | Multi-Temperature Control Refrigerator Comprising an Ice Machine | |
| CN103547872A (en) | Refrigerator | |
| CN112460901B (en) | Refrigerator dehumidification control method and device and air-cooled refrigerator | |
| CN105452785A (en) | Refrigerator | |
| CN114812051B (en) | Refrigerator and defrosting control method for evaporator of refrigerator | |
| KR20170029346A (en) | Control method of refrigerator | |
| CN111089446A (en) | Air-cooled refrigerator | |
| JPH10318645A (en) | Refrigerator | |
| CN113074491A (en) | Air-cooled refrigerator | |
| JP4872558B2 (en) | refrigerator | |
| CN214701420U (en) | Sublimation defrosting system, refrigerating system and refrigerating equipment | |
| JPH11173729A (en) | Refrigerator | |
| CN112595005A (en) | Novel defrosting structure of air-cooled refrigerator and using method thereof | |
| CN110671884A (en) | Air supply control method for defrosting of air-cooled refrigerator and air-cooled refrigerator | |
| JP5380214B2 (en) | refrigerator | |
| JP2012042140A (en) | Refrigerator | |
| JP2019039586A (en) | refrigerator | |
| JP2011144964A (en) | Refrigerator-freezer | |
| KR101811496B1 (en) | Refrigerator and control method thereof | |
| JPH07174451A (en) | Refrigerator with deep freezer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |