CN106766577B - Frosting degree detection method and device for air-cooled refrigerator - Google Patents
Frosting degree detection method and device for air-cooled refrigerator Download PDFInfo
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- CN106766577B CN106766577B CN201611169273.4A CN201611169273A CN106766577B CN 106766577 B CN106766577 B CN 106766577B CN 201611169273 A CN201611169273 A CN 201611169273A CN 106766577 B CN106766577 B CN 106766577B
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- evaporator
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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
- F25D21/02—Detecting the presence of frost or condensate
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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
- 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
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention provides a frosting degree detection method and device for an air-cooled refrigerator. The frosting degree detection method of the air-cooled refrigerator comprises the following steps: acquiring the refrigerating time of a refrigerating system; judging whether the refrigerating time is longer than or equal to a first preset time, and detecting the actual temperature in the refrigerating chamber under the condition that the refrigerating time is longer than or equal to the first preset time; judging whether the actual temperature is less than or equal to a preset temperature or not; and if not, determining that the frosting degree of the evaporator is serious. According to the scheme, the frosting degree of the evaporator is determined by detecting the refrigerating capacity of the refrigerating chamber, the evaporator can be defrosted in time, and the problems that the evaporator is frosted seriously under abnormal conditions, so that the frost cannot be thoroughly defrosted after being frosted and iced, the refrigerating capacity of the refrigerator is reduced, the storage effect of food in the refrigerator is influenced and the like can be solved.
Description
Technical Field
The invention relates to the field of household appliance control, in particular to a frosting degree detection method and device for an air-cooled refrigerator.
Background
With the social development, the living standard of people is increasingly improved, and the pace of life of people is faster and faster, people often buy a large number of articles to place in the refrigerator, and the refrigerator gradually becomes one of the essential household appliances in the life of people. Scientific technology is continuously developing, and refrigerators are also continuously developing and updating. The refrigerator is gradually developed into a direct cooling refrigerator and a latest air cooling refrigerator from the old refrigerator.
the air-cooled refrigerator is also called a frost-free refrigerator, but the air-cooled refrigerator does not generate the frosting phenomenon, but the frost is basically condensed on the evaporator and is not condensed on the inner wall of the refrigerator. The evaporator of the air-cooled refrigerator is arranged in the refrigerator and is separated from the inner wall of the refrigerator. Therefore, the inner wall of the refrigerator does not frost, so the refrigerator is called frostless.
since the surface temperature of the evaporator is low, the wet air flowing over the surface is cooled, and when the temperature of the evaporator is lower than the dew point temperature of the air and lower than 0 ℃, the moisture in the air is condensed and attached to the surface of the evaporator to form a frost layer. The refrigerating chamber of the air-cooled double-system refrigerator is provided with the evaporator, and the evaporator of the refrigerating chamber can frost quickly in the refrigerating process due to the fact that moisture content of foods such as vegetables and fruits and the like placed in the refrigerating chamber is large. The data show that when the thickness of the frost layer on the surface of the evaporator reaches 10mm, the refrigerating capacity of the refrigerator is reduced by at least 30%, so when the thickness of the frost layer reaches a certain thickness, defrosting must be carried out in time.
The existing defrosting mode is to realize defrosting by estimating the frosting amount of an evaporator and detecting the running time and the door opening time of a refrigerator. The defrosting mode is entered under the condition that the running time and the door opening time of the refrigerator both meet the conditions, and the heating wires start to work. However, under the condition that a user puts a large amount of food at one time, the evaporator of the refrigerating chamber condenses a large amount of frost in a short time, when the running time and the door opening time meet the conditions, the frost formed by the evaporator is accumulated for too long time to form ice, the frost cannot be thoroughly dissolved even if the heating wires are started, the refrigerating capacity of the accumulated refrigerator is reduced, and the storage effect of the food in the refrigerator is influenced.
disclosure of Invention
It is an object of the present invention to provide a simple method of detecting the degree of evaporator frosting.
a further object of the present invention is to improve the reliability of defrosting the evaporator and to improve the refrigerating capacity of the refrigerator.
Particularly, the present invention provides a frosting degree detection method of an air-cooled refrigerator, wherein the air-cooled refrigerator comprises a refrigerating compartment and a refrigerating system, wherein the refrigerating system comprises a compressor, an evaporator and a fan to provide refrigerating capacity to the refrigerating compartment, a temperature sensor is arranged in the refrigerating compartment to detect the actual temperature in the refrigerating compartment, and the frosting degree detection method of the air-cooled refrigerator comprises the following steps: acquiring the refrigerating time of a refrigerating system; judging whether the refrigerating time is longer than or equal to a first preset time, and detecting the actual temperature in the refrigerating chamber under the condition that the refrigerating time is longer than or equal to the first preset time; judging whether the actual temperature is less than or equal to a preset temperature or not; and if not, determining that the frosting degree of the evaporator is serious.
Optionally, the refrigerating compartment is provided with an air return opening to return air in the refrigerating compartment to the evaporator, and the method further comprises the following steps after the step of determining that the frosting degree of the evaporator is serious: and controlling the evaporator to stop working and keeping the working state of the fan so as to defrost the evaporator in air.
Optionally, after the step of defrosting the evaporator, the method further comprises: acquiring the air defrosting time for defrosting the evaporator; judging whether the air defrosting time is greater than or equal to a second preset time; and if so, determining that air defrosting is finished and recording the air defrosting times.
Optionally, after the step of recording the number of times of air defrosting, the method further comprises: judging whether the air defrosting times are more than or equal to the preset times or not; and if so, controlling the heater to be started so as to heat and defrost the evaporator.
Optionally, under the condition that the air defrosting time is less than the preset time, the refrigeration system is driven to start refrigeration, and the refrigeration duration of the refrigeration system and the actual temperature in the refrigerating chamber are obtained, so as to detect the frosting degree again.
according to another aspect of the present invention, there is also provided a frosting degree detection apparatus of an air-cooled refrigerator, wherein the air-cooled refrigerator includes a refrigerating compartment and a refrigeration system, wherein the refrigeration system includes a compressor, an evaporator and a fan to supply cold to the refrigerating compartment, a temperature sensor is provided in the refrigerating compartment to detect an actual temperature in the refrigerating compartment, and the frosting degree detection apparatus of the air-cooled refrigerator includes: the first timing module is configured to acquire the refrigerating time of the refrigerating system; the first judgment module is configured to judge whether the refrigerating time is greater than or equal to a first preset time; the temperature detection module is configured to detect the actual temperature in the refrigerating chamber under the condition that the refrigerating time is longer than or equal to a first preset time; a second determination module configured to determine whether the actual temperature is less than or equal to the preset temperature; and a degree determination module configured to determine that the degree of frosting of the evaporator is serious in case that the actual temperature is greater than the preset temperature.
optionally, the refrigerating compartment is provided with an air return opening to return air of the refrigerating compartment to the evaporator, and the frost formation degree detection apparatus of the air-cooled refrigerator further includes: and the first defrosting module is configured to control the evaporator to stop working and maintain the working state of the fan so as to defrost the evaporator in air.
Optionally, the frosting degree detection device of the air-cooled refrigerator further comprises: the second timing module is configured to acquire the air defrosting time for defrosting the evaporator; the third judgment module is configured to judge whether the air defrosting time is longer than or equal to a second preset time; and the frequency recording module is configured to determine that air defrosting is finished and record the frequency of the air defrosting under the condition that the air defrosting time reaches a second preset time.
Optionally, the frosting degree detection device of the air-cooled refrigerator further comprises: the fourth judgment module is configured to judge whether the air defrosting times are greater than or equal to the preset times; and the second defrosting module is configured to control the heater to be started to heat and defrost the evaporator under the condition that the air defrosting frequency is greater than or equal to the preset frequency.
Optionally, the frosting degree detection device of the air-cooled refrigerator further comprises: and the refrigeration driving module is configured to drive the refrigeration system to start refrigeration under the condition that the air defrosting times are less than the preset times, and acquire the refrigeration duration of the refrigeration system and the actual temperature in the refrigerating chamber so as to detect the frosting degree again.
According to the method and the device for detecting the frosting degree of the air-cooled refrigerator, the refrigeration time of a refrigeration system is obtained, the actual temperature in the refrigerating chamber is detected under the condition that the refrigeration time is longer than or equal to the first preset time, after the refrigeration time reaches the first preset time, the actual temperature in the refrigerating chamber is lower than or equal to the preset temperature, if the actual temperature is higher than the preset temperature, the refrigerating capacity of the refrigerating chamber is determined to be reduced, the frosting degree of an evaporator can be determined to be serious, the frosting degree of the evaporator can be detected in time, the problem that the frosting of the evaporator is serious under abnormal conditions, the frost cannot be thoroughly removed after the frost is formed into ice, the refrigerating capacity of the refrigerator is reduced, the storage effect of food in the refrigerator is influenced and the like can be avoided, in addition, the method for detecting the frosting degree of the evaporator is simple, convenient and rapid, and the refrigerator.
Furthermore, the frosting degree detection method and the device of the air-cooled refrigerator of the invention control the evaporator to stop working after determining the frosting degree of the evaporator is serious, and keep the working state of the fan, so as to utilize the air from the cold storage chamber to carry out air defrosting on the evaporator, after the air defrosting is finished, the refrigerating system is driven to refrigerate again, the frosting degree of the evaporator is detected again, the circulation is carried out, when the times of the air defrosting reach the preset times, the frosting degree of the evaporator is determined to be serious, the air defrosting can not be thoroughly defrosted, at the moment, the heater is controlled to be started, the evaporator is heated and defrosted, the air defrosting is carried out on the evaporator by utilizing the air from the cold storage chamber firstly, the times of starting the heater can be reduced, the energy consumption is effectively saved, the air defrosting is combined with the heating defrosting, the reliability of the evaporator defrosting can be improved, the defrosting device has the advantages that the defrosting is thoroughly realized, the evaporator can normally work, the refrigerating capacity of the refrigerator is improved, and the use experience of a user is improved.
the above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural view of an air-cooled refrigerator to which a frost formation degree detection apparatus for an air-cooled refrigerator according to an embodiment of the present invention is applied;
FIG. 2 is a side cross-sectional view of the air-cooled refrigerator shown in FIG. 1;
Fig. 3 is a schematic block diagram of a frosting degree detection apparatus of an air-cooled refrigerator according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a frosting degree detection apparatus of an air-cooled refrigerator according to another embodiment of the present invention;
fig. 5 is a schematic view of a frosting degree detection method of an air-cooled refrigerator according to an embodiment of the present invention; and
Fig. 6 is a detailed flowchart of a frosting degree detection method of an air-cooled refrigerator according to an embodiment of the present invention.
Detailed Description
The embodiment provides a frosting degree detection device of air-cooled refrigerator, can in time detect the evaporimeter frosting degree of air-cooled refrigerator to thoroughly defrost the evaporimeter in the serious condition of frosting degree, promote the refrigerating capacity of air-cooled refrigerator. Fig. 1 is a schematic structural view of an air-cooled refrigerator 100 to which a blowing control apparatus for an air-cooled refrigerator according to an embodiment of the present invention is applied, and fig. 2 is a side sectional view of the air-cooled refrigerator 100 shown in fig. 1. The air-cooled refrigerator 100 may generally include: the refrigerator comprises a refrigerator body 10, a door body and a refrigerating system.
wherein, the box body 10 is internally defined with a storage compartment and a compressor bin. The number and the structure of the storage compartments can be configured as required, and fig. 1 shows the case of a first compartment and a second compartment which are arranged in sequence from top to bottom; the storage chamber can be configured into a refrigerating chamber, a freezing chamber, a temperature changing chamber or a fresh-keeping chamber according to different purposes. Each storage compartment can be divided into a plurality of storage areas by a partition plate, and the articles are stored by racks or drawers. The air-cooled refrigerator 100 includes at least one refrigerating compartment, and the first compartment of the air-cooled refrigerator 100 of this embodiment is a refrigerating compartment 11, and the second compartment is a freezing compartment 12.
The door body is disposed on a front surface of the cabinet 10 to enclose the storage compartment. The door bodies can be arranged corresponding to the storage chambers, namely, each storage chamber is provided with one or more door bodies correspondingly. The number of the storage compartments and the door bodies and the functions of the storage compartments can be actually selected according to specific conditions. The air-cooled refrigerator 100 of the present embodiment is provided with a first door 21 and a second door 22 corresponding to the refrigerating compartment 11 and the freezing compartment 12 which are arranged in this order from top to bottom. The door body can be pivotally arranged on the front surface of the box body 10, and can be opened in a drawer mode to realize a drawer-type storage chamber, wherein the drawer-type storage chamber is often provided with a metal sliding rail, so that the effect of the drawer in the opening and closing process can be ensured to be soft, and the noise can be reduced.
the refrigerating system can be a compression refrigerating cycle system comprising a compressor, an evaporator and a fan so as to provide cold energy for the storage chamber, wherein the refrigerating system can also comprise a condenser, a throttling device and the like, and the compressor is arranged in the compressor bin. The evaporator is configured to provide cooling directly or indirectly to the storage compartment. The air-cooled refrigerator 100 of this embodiment may be a dual-refrigeration system refrigerator, that is, the refrigeration system includes two evaporators respectively disposed in the refrigerating compartment 11 and the freezing compartment 12, and during the refrigeration process, the evaporator of the refrigerating compartment 11 and the evaporator of the freezing compartment 12 may alternatively refrigerate. The refrigeration switching of the refrigerating chamber 11 and the freezing chamber 12 can be realized by controlling the flow direction of the refrigerant, the refrigerant is transferred to the evaporator of the refrigerating chamber 11, and the refrigerating chamber 11 refrigerates; the refrigerant passes to the evaporator of the freezing compartment 12, and the freezing compartment 12 cools. In other embodiments, the air-cooled refrigerator 100 may include only the refrigeration compartment 11, with the refrigeration system providing only cooling to the refrigeration compartment 11.
the air-cooled refrigerator 100 may include a liner having a storage compartment defined therein, and a refrigerating compartment 11 and a freezing compartment 12 defined therein in this embodiment. An evaporator cavity and an air supply duct are formed on the outer side of the back of the inner container, wherein the evaporator 111 and the fan 112 of the refrigerating compartment 11 can be arranged in the evaporator cavity of the refrigerating compartment 11. The air supply duct of the refrigerating compartment 11 is provided with an air outlet 113. The air supply duct can be designed in a bilateral symmetry mode, and each storage area is provided with at least two bilateral symmetry air outlets, so that air supply of each storage area is more effective, the temperature of each storage area is more uniform, and storage of articles in the air-cooled refrigerator 100 is facilitated. The fan 112 can supply the cooling energy generated by the evaporator 111 to the refrigerating compartment 11.
As shown in fig. 2, the dashed arrows show the direction of air circulation in the refrigerated compartment 11. When the high-temperature air flow passes through the evaporator 111, heat exchange with the evaporator 111 is sufficiently performed, and the temperature of the air is lowered. Meanwhile, the fan 112 forces the cold air to flow circularly, and the air flow is sent to the refrigerating compartment 11 through each air outlet 113 of the refrigerating compartment 11 along the air supply duct. The inner container of the refrigerating compartment 11 is further provided with a return air inlet 114, so that the air with the increased temperature in the refrigerating compartment 11 enters from the return air inlet 114 and returns to the evaporator 111 through a refrigerating return air duct, and after the temperature is reduced, the air enters the refrigerating compartment 11 again through an air supply duct of the refrigerating compartment 11, and the air is circulated in the manner. The air-cooled refrigerator 100 reduces the temperature of the air-cooled refrigerator 100 in such a continuous circulation manner. A temperature sensor may be disposed in the refrigerating compartment 11 of the air-cooled refrigerator 100 to detect the actual temperature in the refrigerating compartment 11.
fig. 3 is a schematic block diagram of a frosting degree detection apparatus 30 of an air-cooled refrigerator according to an embodiment of the present invention, wherein the frosting degree detection apparatus 30 of the air-cooled refrigerator can detect the frosting degree of the evaporator of the air-cooled refrigerator 100 in the above-mentioned embodiment. As shown in fig. 3, the frosting degree detection apparatus 30 of the air-cooled refrigerator of the present embodiment may include: a first timing module 311, a first determination module 312, a temperature detection module 313, a second determination module 314, and a degree determination module 315.
Among the above modules, the first timing module 311 may be configured to obtain a cooling time period of the refrigeration system. The first determination module 312 may be configured to determine whether the cooling time period is greater than or equal to a first preset time period. The temperature detection module 313 may be configured to detect the actual temperature within the refrigeration compartment 11 if the cooling time period is greater than or equal to a first preset time period. The second determination module 314 may be configured to determine whether the actual temperature is less than or equal to the preset temperature. The extent determination module 315 may be configured to determine that the degree of frosting of the evaporator 111 is severe if the actual temperature is greater than the preset temperature.
The first preset time and the preset temperature can be set in a matching manner, when the evaporator 111 is not frosted and is in a normal refrigeration state, and the refrigeration time of the refrigeration system is T1, the actual temperature in the refrigeration compartment 11 can reach T, the first preset time can be set to be T1, and the preset temperature is set to be T. In a preferred embodiment, the first preset time period may be the maximum refrigerating time of the refrigerating compartment 11, and the corresponding preset temperature may be the shutdown temperature of the refrigerating compartment 11. After the refrigerating time reaches the first preset time, if the actual temperature of the refrigerating chamber 11 is greater than the preset temperature, the refrigerating capacity of the refrigerating chamber 11 is reduced, the frosting degree of the evaporator 111 can be determined to be serious, the frosting degree of the evaporator 111 can be detected in time, and the problems that the frosting of the evaporator 111 is serious under abnormal conditions, the frost cannot be thoroughly removed after the frost is formed into ice, the refrigerating capacity of the refrigerator is reduced, the storage effect of food in the refrigerator is influenced and the like can be avoided. In addition, in the air-cooled refrigerator, other compartments than the refrigerating compartment 11, for example, the freezing compartment 12, may be determined by detecting the cooling capacity of the evaporator to determine the degree of frosting of the evaporator.
Fig. 4 is a schematic block diagram of a frosting degree detection apparatus 30 of an air-cooled refrigerator according to another embodiment of the present invention. On the basis of the above embodiment, the frosting degree detection apparatus 30 of the air-cooled refrigerator of the present embodiment may further include: the defrosting system comprises a first defrosting module 321, a second timing module 322, a third judging module 323, a frequency recording module 324, a fourth judging module 325, a second defrosting module 326 and a refrigerating driving module 327.
the first defrosting module 321 may be configured to control the evaporator 111 to stop operating and maintain an operating state of the fan 112 to defrost the evaporator 111. The air-cooled refrigerator 100 of the present embodiment may include a refrigerating compartment 11 and a freezing compartment 12, and during a refrigerating process, an evaporator of the refrigerating compartment 11 and an evaporator of the freezing compartment 12 may alternately perform refrigeration. Wherein the refrigeration system provides different amounts of cooling to the cold storage compartment 11 and the freezer compartment 12, so that the temperatures in the cold storage compartment 11 and the freezer compartment 12 are also different. The temperature in the cold storage compartment 11 is generally between 2 ℃ and 10 ℃, preferably between 3 ℃ and 8 ℃. The temperature in the freezer compartment 12 is typically in the range of-22 deg.C to-14 deg.C. Since the temperature in the refrigerating compartment 11 is higher than 0 ℃, the air returned to the evaporator 111 from the return air inlet 114 of the refrigerating compartment 11 is generally air with a raised temperature in the refrigerating compartment 11, and can be used for defrosting the evaporator 111. Meanwhile, the frosted cold energy of the evaporator 111 can also cool the refrigerating chamber 11, and the temperature in the refrigerating chamber 11 can be ensured to meet the storage requirement to a certain extent.
in the case where the air-cooled refrigerator 100 is a dual refrigeration system refrigerator, during defrosting of air in the evaporator 111 in the refrigerating compartment 11, the refrigerant may be transferred to the evaporator of the freezing compartment 12, the compressor is still operated, and the freezing compartment 12 is in a refrigerating state. In other embodiments, the air-cooled refrigerator 100 may only include the refrigerating compartment 11, and during the process of defrosting the air of the evaporator 111 in the refrigerating compartment 11, the compressor may stop working together with the evaporator 111, so as to avoid additional work performed by the compressor, and save energy consumption.
the second timing module 322 may be configured to obtain an air defrosting time period for defrosting the evaporator 111. The third determination module 323 may be configured to determine whether the air defrosting period is greater than or equal to a second preset period. The number recording module 324 may be configured to determine that air defrosting is completed and record the number of times of air defrosting in case the air defrosting time period reaches a second preset time period. The second preset time period can be set according to actual conditions, and the effect of defrosting the evaporator 111 is taken as a standard.
The fourth determination module 325 may be configured to determine whether the number of times of air defrosting is greater than or equal to a preset number of times. The second defrosting module 326 may be configured to control the heater to be turned on to heat and defrost the evaporator 111 if the air defrosting time is greater than or equal to a preset time. The refrigeration driving module 327 may be configured to drive the refrigeration system to start refrigeration when the air defrosting time is less than the preset time, and obtain the refrigeration time of the refrigeration system and the actual temperature in the refrigerating compartment 11, so as to perform the detection of the frosting degree again.
it should be noted that, if the first preset time period for refrigerating the refrigerating compartment 11 is T1, the second preset time period for defrosting the evaporator 111 is T2, and the preset number of times of defrosting is N, the time of (T1+ T2) × N is less than the original defrosting period T of the air-cooled refrigerator 100, where the defrosting period T is the time interval between two original defrosting processes of the air-cooled refrigerator 100. The original defrosting process can be realized by detecting the refrigerating time and the door opening time of the refrigerator, for example, when the refrigerating time and the door opening time of the refrigerator both meet the conditions, defrosting is performed by the heater, but when the refrigerating time and the door opening time both meet the conditions, that is, the time of the defrosting period T passes, the accumulated time of frosting of the evaporator 111 is too long. In an abnormal situation, for example, in the case that a large amount of vegetables and fruits are put into the refrigerating compartment 11 at a time, although the refrigerating time and the door opening time of the refrigerator do not satisfy the conditions, the evaporator 111 may have frosted seriously, and may be turned into ice in an untimely process, and thus, the frost cannot be completely removed. The time of (T1+ T2) × N in this embodiment is less than the original defrosting period T of the air-cooled refrigerator 100, so that the frosting degree of the evaporator 111 can be detected in time and defrosting can be performed when frosting is serious, and the refrigeration effect of the refrigerator is prevented from being affected.
The frosting degree detection device 30 of the air-cooled refrigerator of the embodiment detects the actual temperature in the refrigerating chamber 11 by acquiring the refrigerating time of the refrigerating system under the condition that the refrigerating time is greater than or equal to the first preset time, and after the refrigerating time reaches the first preset time, the actual temperature in the refrigerating chamber 11 should be lower than or equal to the preset temperature, if the actual temperature is greater than the preset temperature, it is determined that the refrigerating capacity of the refrigerating chamber 11 is reduced, and then the frosting degree of the evaporator 111 is determined to be serious, and the frosting degree of the evaporator 111 is detected in time, so that the problem that the frosting of the evaporator 111 is serious under abnormal conditions, so that the frosting cannot be completely removed after the frosting is formed into ice, the refrigerating capacity of the refrigerator is reduced, the storage effect of food in the refrigerator is affected, and the like can be avoided, in addition, the frosting degree detection method of the evaporator 111 is simple, convenient and quick.
further, the frosting degree detection device 30 of the air-cooled refrigerator of the embodiment controls the evaporator 111 to stop working after determining that the frosting degree of the evaporator 111 is serious, and keeps the working state of the fan 112, so as to utilize the air from the refrigerating chamber 11 to defrost the evaporator 111, after the defrosting of the air is finished, the refrigeration system is driven again to refrigerate, the frosting degree of the evaporator 111 is detected again, the cycle is repeated, and when the defrosting frequency reaches the preset frequency, the frosting degree of the evaporator 111 is determined to be serious, the defrosting can not be completely performed through the defrosting of the air, at this time, the heater is controlled to be turned on, the evaporator 111 is heated to defrost, the air from the refrigerating chamber 11 is firstly used to defrost the evaporator 111 to reduce the turn-on frequency of the heater, the energy consumption is effectively saved, the defrosting of the air and the defrosting by heating are combined, the reliability of the defrosting of the evaporator 111 can be improved, the defrosting is thoroughly realized, the evaporator 111 can normally work, the refrigerating capacity of the refrigerator is improved, and the use experience of a user is improved.
fig. 5 is a schematic diagram of a frosting degree detection method of an air-cooled refrigerator according to an embodiment of the present invention, which can be performed by using the frosting degree detection apparatus 30 of the air-cooled refrigerator of any of the above embodiments. As shown in the figure, the frosting degree detection method of the air-cooled refrigerator sequentially executes the following steps:
Step S502, obtaining the refrigerating time of the refrigerating system;
step S504, judging whether the refrigerating time is greater than or equal to a first preset time, if so, executing step S506, otherwise, returning to execute step S502;
Step S506, detecting the actual temperature in the refrigerating compartment 11;
Step S508, determining whether the actual temperature is less than or equal to the preset temperature, if so, returning to step S502, otherwise, executing step S510;
In step S510, it is determined that the degree of frosting of the evaporator 111 is serious.
In the above steps, the cooling time period in step S502 may be acquired by a timer, and the actual temperature in step S506 may be detected by a temperature sensor provided in the refrigerating compartment 11.
The first preset time period in step S504 and the preset temperature in step S508 may be set in a matching manner, and in a state where the evaporator 111 is not frosted and normal cooling is performed, when the cooling time period of the cooling system is T1, the actual temperature in the refrigerating compartment 11 may reach T, the first preset time period may be set to T1, and the preset temperature is set to T. In a preferred embodiment, the first preset time period may be the maximum refrigerating time of the refrigerating compartment 11, and the corresponding preset temperature may be the shutdown temperature of the refrigerating compartment 11. After the refrigerating time reaches the first preset time, if the actual temperature of the refrigerating chamber 11 is greater than the preset temperature, the refrigerating capacity of the refrigerating chamber 11 is reduced, the frosting degree of the evaporator 111 can be determined to be serious, the frosting degree of the evaporator 111 can be detected in time, and the problems that the frosting of the evaporator 111 is serious under abnormal conditions, the frost cannot be thoroughly removed after the frost is formed into ice, the refrigerating capacity of the refrigerator is reduced, the storage effect of food in the refrigerator is influenced and the like can be avoided. In addition, in the air-cooled refrigerator 100, the frosting degree of the evaporator 111 may be determined by detecting the cooling capacity of the evaporator in other compartments than the refrigerating compartment 11, for example, the freezing compartment 12.
fig. 6 is a detailed flowchart of a frosting degree detection method of an air-cooled refrigerator according to an embodiment of the present invention. The frosting degree detection method of the air-cooled refrigerator sequentially comprises the following steps:
Step S602, obtaining the refrigerating time of a refrigerating system;
Step S604, judging whether the refrigerating time is greater than or equal to a first preset time, if so, executing step S606, otherwise, returning to execute step S602;
step S606, detecting the actual temperature in the refrigerating compartment 11;
step S608, determining whether the actual temperature is less than or equal to the preset temperature, if yes, returning to step S602, otherwise, executing step S610;
Step S610, determining that the frosting degree of the evaporator 111 is serious;
step S612, controlling the evaporator 111 to stop working, and maintaining the working state of the fan 112 to defrost the evaporator 111;
Step S614, acquiring an air defrosting time period for defrosting the evaporator 111;
Step S616, determining whether the defrosting time period is greater than or equal to a second preset time period, if so, executing step S618, otherwise, returning to execute step S614;
step 618, determining that air defrosting is finished and recording the times of air defrosting;
Step S620, determining whether the air defrosting time is greater than or equal to a preset time, if so, executing step S622, otherwise, executing step S624;
Step S622, controlling the heater to be turned on to heat and defrost the evaporator 111;
In step S624, the refrigeration system is driven to start cooling and the process returns to step S602.
In the above step, the evaporator 111 is air-defrosted in step S612, and the gas returned to the evaporator 111 from the return air inlet 114 of the refrigerating compartment 11 can be used. The air-cooled refrigerator 100 of the present embodiment may include a refrigerating compartment 11 and a freezing compartment 12, and during a refrigerating process, an evaporator of the refrigerating compartment 11 and an evaporator of the freezing compartment 12 may alternately perform refrigeration. Wherein the refrigeration system provides different amounts of cooling to the cold storage compartment 11 and the freezer compartment 12, so that the temperatures in the cold storage compartment 11 and the freezer compartment 12 are also different. The temperature in the cold storage compartment 11 is generally between 2 ℃ and 10 ℃, preferably between 3 ℃ and 8 ℃. The temperature in the freezer compartment 12 is typically in the range of-22 deg.C to-14 deg.C. Since the temperature in the refrigerating compartment 11 is higher than 0 ℃, the air returned to the evaporator 111 from the return air inlet 114 of the refrigerating compartment 11 is generally air with a raised temperature in the refrigerating compartment 11, and can be used for defrosting the evaporator 111.
in the case where the air-cooled refrigerator 100 is a dual refrigeration system refrigerator, during defrosting of the evaporator 111 in the refrigerating compartment 11, the refrigerant may be transferred to the evaporator of the freezing compartment 12, and the compressor may still operate while the evaporator 111 is stopped in step S612, and the freezing compartment 12 is in a cooling state. In other embodiments, the air-cooled refrigerator 100 may only include the refrigerating compartment 11, and during the process of defrosting the air of the evaporator 111 in the refrigerating compartment 11, the compressor may stop working together while the evaporator 111 stops working in step S612, so as to avoid additional work performed by the compressor, and save energy consumption.
it should be noted that, if the first preset time period for refrigerating the refrigerating compartment 11 is T1, the second preset time period for defrosting the evaporator 111 is T2, and the preset number of times of defrosting is N, the time of (T1+ T2) × N is less than the original defrosting period T of the air-cooled refrigerator 100, where the defrosting period T is the time interval between two original defrosting processes of the air-cooled refrigerator 100. The original defrosting process can be realized by detecting the refrigerating time and the door opening time of the refrigerator, for example, when the refrigerating time and the door opening time of the refrigerator both meet the conditions, defrosting is performed by the heater, but when the refrigerating time and the door opening time both meet the conditions, that is, the time of the defrosting period T passes, the accumulated time of frosting of the evaporator 111 is too long. In an abnormal situation, for example, in the case that a large amount of vegetables and fruits are put into the refrigerating compartment 11 at a time, although the refrigerating time and the door opening time of the refrigerator do not satisfy the conditions, the evaporator 111 may have frosted seriously, and may be turned into ice in an untimely process, and thus, the frost cannot be completely removed. The time of (T1+ T2) × N in this embodiment is less than the original defrosting period T of the air-cooled refrigerator 100, so that the frosting degree of the evaporator 111 can be detected in time and defrosting can be performed when frosting is serious, and the refrigeration effect of the refrigerator is prevented from being affected.
according to the frosting degree detection method of the air-cooled refrigerator, by obtaining the refrigerating time of the refrigerating system, under the condition that the refrigerating time is greater than or equal to the first preset time, the actual temperature in the refrigerating chamber 11 is detected, after the refrigerating time reaches the first preset time, the actual temperature in the refrigerating chamber 11 should be lower than or equal to the preset temperature, if the actual temperature is greater than the preset temperature, the refrigerating capacity of the refrigerating chamber 11 is determined to be reduced, the frosting degree of the evaporator 111 can be determined to be serious, the frosting degree of the evaporator 111 can be detected in time, the problem that the evaporator 111 is frosted seriously under abnormal conditions, so that the frost cannot be completely defrosted after the frost is formed into ice can be solved, the refrigerating capacity of the refrigerator is reduced, the storage effect of food in the refrigerator is influenced, and the like can be avoided, in addition, the frosting degree detection method of the evaporator 111 is simple, convenient and rapid.
Further, in the frosting degree detection method of the air-cooled refrigerator of the embodiment, after determining that the frosting degree of the evaporator 111 is serious, the evaporator 111 is controlled to stop working, and the working state of the fan 112 is maintained, so that air defrosting is performed on the evaporator 111 by using the air from the refrigerating compartment 11, after the air defrosting is finished, the refrigeration system is driven to refrigerate, the frosting degree of the evaporator 111 is detected again, the cycle is repeated, and when the frosting degree of the evaporator 111 reaches the preset times, the frosting degree of the evaporator 111 is determined to be serious, the defrosting cannot be completely performed through the air defrosting, at this time, the heater is controlled to be turned on, the evaporator 111 is heated and defrosted, the turning-on times of the heater can be reduced by firstly performing the air defrosting on the evaporator 111 by using the air from the refrigerating compartment 11, the energy consumption is effectively saved, the air defrosting and the heating defrosting are combined, so that the reliability of defrosting on the evaporator 111 can be improved, the defrosting is thoroughly realized, the evaporator 111 can normally work, the refrigerating capacity of the refrigerator is improved, and the use experience of a user is improved.
thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (6)
1. A method of detecting the level of frost formation in an air-cooled refrigerator comprising a refrigeration compartment and a refrigeration system, wherein the refrigeration system comprises a compressor, an evaporator and a fan to provide refrigeration to the refrigeration compartment, a temperature sensor is provided in the refrigeration compartment to detect the actual temperature in the refrigeration compartment, and the method comprises:
Acquiring the refrigerating time of the refrigerating system;
Judging whether the refrigerating time is longer than or equal to a first preset time, and detecting the actual temperature in the refrigerating chamber under the condition that the refrigerating time is longer than or equal to the first preset time;
Judging whether the actual temperature is less than or equal to a preset temperature or not; and
If not, determining that the frosting degree of the evaporator is serious,
Wherein the refrigerating compartment is provided with an air return opening to return air of the refrigerating compartment to the evaporator, and further comprising, after the step of determining that the degree of frosting of the evaporator is serious: controlling the evaporator to stop working and keeping the working state of the fan so as to defrost the evaporator by air,
the step of defrosting the evaporator by air further comprises the following steps: acquiring the air defrosting time for defrosting the evaporator; judging whether the air defrosting time is greater than or equal to a second preset time; and if so, determining that air defrosting is finished and recording the air defrosting times.
2. the method of claim 1, further comprising, after the step of recording the number of air frostings:
judging whether the air defrosting times are more than or equal to preset times or not; and
If yes, the heater is controlled to be started so as to heat and defrost the evaporator.
3. The method of claim 2, wherein,
And under the condition that the air defrosting times are less than the preset times, driving the refrigerating system to start refrigerating, and acquiring the refrigerating time of the refrigerating system and the actual temperature in the refrigerating chamber to detect the frosting degree again.
4. A frosting degree detection apparatus of an air-cooled refrigerator, wherein the air-cooled refrigerator includes a refrigerating compartment and a refrigeration system, wherein the refrigeration system includes a compressor, an evaporator and a fan to provide refrigeration to the refrigerating compartment, a temperature sensor is provided in the refrigerating compartment to detect an actual temperature in the refrigerating compartment, and the apparatus comprises:
the first timing module is configured to acquire the refrigerating time of the refrigerating system;
the first judgment module is configured to judge whether the refrigerating time is greater than or equal to a first preset time;
A temperature detection module configured to detect an actual temperature within the refrigerated compartment when the refrigeration duration is greater than or equal to the first preset duration;
A second judgment module configured to judge whether the actual temperature is less than or equal to a preset temperature; and
A degree determination module configured to determine that a degree of frosting of the evaporator is serious in a case where the actual temperature is greater than the preset temperature,
Wherein the refrigerating compartment is provided with an air return opening to return air of the refrigerating compartment to the evaporator, and the apparatus further comprises: a first defrosting module configured to control the evaporator to stop working and maintain the working state of the fan so as to defrost the evaporator by air,
the second timing module is configured to acquire an air defrosting time for defrosting the evaporator;
The third judging module is configured to judge whether the air defrosting time is greater than or equal to a second preset time; and
and the frequency recording module is configured to determine that air defrosting is finished and record the frequency of air defrosting under the condition that the air defrosting time reaches the second preset time.
5. the apparatus of claim 4, further comprising:
the fourth judgment module is configured to judge whether the air defrosting times are larger than or equal to preset times; and
and the second defrosting module is configured to control the heater to be started to heat and defrost the evaporator under the condition that the air defrosting frequency is greater than or equal to the preset frequency.
6. the apparatus of claim 5, further comprising:
And the refrigeration driving module is configured to drive the refrigeration system to start refrigeration under the condition that the air defrosting time is less than the preset time, and obtain the refrigeration time of the refrigeration system and the actual temperature in the refrigerating chamber so as to detect the frosting degree again.
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| CN201611169273.4A CN106766577B (en) | 2016-12-16 | 2016-12-16 | Frosting degree detection method and device for air-cooled refrigerator |
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| CN201611169273.4A CN106766577B (en) | 2016-12-16 | 2016-12-16 | Frosting degree detection method and device for air-cooled refrigerator |
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| CN108917282A (en) * | 2018-05-18 | 2018-11-30 | 山东科技大学 | A kind of defrosting control device and method of refrigerating display case |
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| CN114353420A (en) * | 2021-12-10 | 2022-04-15 | 珠海格力电器股份有限公司 | Control method, control device, electronic equipment and storage medium |
| CN115031469B (en) * | 2022-04-25 | 2024-06-11 | 海信冰箱有限公司 | Refrigerator and defrosting control method thereof |
| 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 |
| CN115325771B (en) * | 2022-09-13 | 2024-06-18 | 长虹美菱股份有限公司 | Self-regulating control system and control method for refrigerating temperature of refrigerator |
| CN116242096A (en) * | 2023-02-10 | 2023-06-09 | 长虹美菱股份有限公司 | Control method and device for preventing frost blockage of refrigerator evaporator and refrigerator |
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