CN115875926A - Refrigeration equipment and defrosting method and device thereof - Google Patents
Refrigeration equipment and defrosting method and device thereof Download PDFInfo
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- CN115875926A CN115875926A CN202110995266.4A CN202110995266A CN115875926A CN 115875926 A CN115875926 A CN 115875926A CN 202110995266 A CN202110995266 A CN 202110995266A CN 115875926 A CN115875926 A CN 115875926A
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- 238000010257 thawing Methods 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000005057 refrigeration Methods 0.000 title claims abstract description 41
- 238000007710 freezing Methods 0.000 claims abstract description 66
- 230000008014 freezing Effects 0.000 claims abstract description 66
- 238000004590 computer program Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000004891 communication Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000003287 optical effect Effects 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
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Abstract
The invention provides refrigeration equipment and a defrosting method and device thereof. The defrosting method of the refrigeration equipment comprises the steps of obtaining the actual temperature of an evaporator; and adjusting the working state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer. According to the defrosting method of the refrigeration equipment, the actual temperature of the evaporator is obtained, the actual temperature of the evaporator is compared with the freezing point temperature of the frost layer on the evaporator, the working state of the heater is adjusted through the comparison of the actual temperature of the evaporator and the freezing point temperature of the frost layer, the working state of the heater can be adjusted based on the frost layer temperature, and the heating mode of the heater is more targeted. Furthermore, the defrosting method can be suitable for evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the heat exchangers is reduced.
Description
Technical Field
The invention relates to the technical field of defrosting, in particular to refrigeration equipment and a defrosting method and device thereof.
Background
Thick frost in the refrigeration equipment can influence the heat exchange efficiency of the refrigerator, thereby influencing the refrigeration capacity and the fresh-keeping capacity of the refrigeration equipment and causing the refrigeration equipment to consume more power.
Taking a refrigerator as an example, in the related art, the current defrosting mode is generally to turn on a heater at the lower part of an evaporator for defrosting, during defrosting, the heater is always turned on, and when a defrosting condition is reached, the heater is turned off and defrosting is exited. In the defrosting mode, the heater is arranged at the lower part of the evaporator, the heat generated by the heater is concentrated at the lower part of the evaporator, the inner container and other parts at the periphery of the evaporator can be continuously heated, and meanwhile, when the volume of the evaporator is relatively large, the time for transferring the heat at the bottom of the evaporator to the upper part of the evaporator in a heat conduction mode is long, the defrosting period is prolonged, the defrosting efficiency is low, and the power consumption is high.
Disclosure of Invention
The present invention has been made to solve at least one of the problems occurring in the related art. Therefore, the invention provides a defrosting method of refrigeration equipment, which can improve defrosting efficiency and reduce energy consumption.
The invention also provides a defrosting device of the refrigerating equipment.
The invention also provides a refrigerating device.
The invention further provides the electronic equipment.
The invention also proposes a non-transitory computer-readable storage medium.
In a first aspect, an embodiment of the present invention provides a defrosting method for a refrigeration apparatus, including:
acquiring the actual temperature of the evaporator;
and adjusting the working state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer.
According to the defrosting method of the refrigeration equipment provided by the embodiment of the first aspect of the invention, the actual temperature of the evaporator is obtained, the actual temperature of the evaporator is compared with the freezing point temperature of the frost layer on the evaporator, the working state of the heater is adjusted through the comparison of the actual temperature of the evaporator and the freezing point temperature of the frost layer, the working state of the heater can be adjusted based on the temperature of the frost layer, and the heating mode of the heater is stronger in pertinence. Furthermore, the defrosting method can be suitable for evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the heat exchangers is reduced.
According to an embodiment of the present invention, the step of adjusting the operating state of the heater based on the result of the comparison of the actual temperature with the freezing point temperature of the frost layer includes:
determining that the actual temperature is less than a preset temperature, and periodically turning on and off the heater;
determining that the actual temperature is equal to the preset temperature, and adjusting the working state of the heater to enable the actual temperature to reach the freezing point temperature;
determining that the actual temperature is greater than the defrosting exit temperature, and exiting defrosting;
wherein, the preset temperature is less than the freezing point temperature, and the defrosting exit temperature is greater than the freezing point temperature.
According to an embodiment of the present invention, the step of determining that the actual temperature is less than the preset temperature and periodically turning on and off the heater comprises:
acquiring a temperature rise difference of the evaporator before and after the heater is started for the time;
determining that the temperature rise temperature difference is larger than a first preset temperature difference, and reducing the next starting time of the heater based on the starting time of the time;
determining that the temperature rise temperature difference is larger than a second preset temperature difference and smaller than a first preset temperature difference, and keeping the next starting time of the heater unchanged based on the starting time of the time;
and determining that the temperature rise temperature difference is smaller than the second preset temperature difference, and prolonging the next starting time of the heater based on the starting time of the time.
According to an embodiment of the present invention, the step of determining that the actual temperature is less than the preset temperature and periodically turning on and off the heater comprises:
acquiring a temperature rise difference of the evaporator before and after the heater is turned off for the time;
determining that the temperature rise temperature difference is larger than a third preset temperature difference, and reducing the next closing time length of the heater based on the closing time length;
determining that the temperature rise temperature difference is greater than a fourth preset temperature difference and less than a third preset temperature difference, and keeping the next closing time of the heater unchanged based on the closing time of the time;
and determining that the temperature rise temperature difference is smaller than a fourth preset temperature difference, and prolonging the next closing time of the heater based on the closing time of this time.
According to an embodiment of the present invention, the step of adjusting the operating state of the heater to make the actual temperature reach the freezing point temperature includes:
and determining that the heater is in a starting state, and keeping the starting time of the heater unchanged based on the last starting time until the actual temperature reaches the freezing point temperature.
According to an embodiment of the present invention, the step of adjusting the operating state of the heater to make the actual temperature reach the freezing point temperature includes:
and determining that the heater is in a closed state, starting the heater and keeping the current starting time of the heater so as to enable the actual temperature to reach the freezing point temperature.
According to an embodiment of the present invention, the step of determining that the actual temperature is greater than the defrosting exit temperature and exiting defrosting includes:
and after the heater is closed for a preset time, the heater is turned on again until the actual temperature reaches the defrosting exit temperature.
In a second aspect, an embodiment of the present invention provides a defrosting device for a refrigeration apparatus, including:
the acquisition module is used for acquiring the actual temperature of the evaporator;
and the adjusting module is used for adjusting the working state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer.
According to the defrosting device of the refrigeration equipment provided by the embodiment of the second aspect of the invention, the actual temperature of the evaporator is acquired by the acquisition module, and the actual temperature of the evaporator is compared with the freezing point temperature of the frost layer on the evaporator by the adjustment module, so that the working state of the heater can be adjusted based on the temperature of the frost layer, and the heating mode of the heater is more targeted. And then can guarantee that this defrosting device can be applicable to the evaporimeter and the heater of different grade type, has improved the defrosting efficiency to the evaporimeter, has reduced the useless power loss of heat of changing.
In a third aspect, embodiments of the present invention provide a refrigeration apparatus, comprising:
the processor is used for realizing the steps of the defrosting method of the refrigeration equipment when executing the computer program;
the temperature sensor is used for acquiring the actual temperature of the evaporator;
and the processor adjusts the working state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer.
In a fourth aspect, the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the defrosting method of the refrigeration device are implemented.
In a fifth embodiment of the present invention, a non-transitory computer readable storage medium is provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the defrosting method of the refrigeration equipment.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
according to the defrosting method of the refrigeration equipment provided by the embodiment of the first aspect of the invention, the actual temperature of the evaporator is obtained, the actual temperature of the evaporator is compared with the freezing point temperature of the frost layer on the evaporator, the working state of the heater is adjusted through the comparison of the actual temperature of the evaporator and the freezing point temperature of the frost layer, the working state of the heater can be adjusted based on the temperature of the frost layer, and the heating mode of the heater is stronger in pertinence. Furthermore, the defrosting method can be suitable for evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the heat exchangers is reduced.
Further, according to the defrosting device of the refrigeration apparatus provided by the embodiment of the second aspect of the present invention, the actual temperature of the evaporator is obtained by the obtaining module, and the actual temperature of the evaporator is compared with the freezing point temperature of the frost layer on the evaporator by the adjusting module, so that the working state of the heater can be adjusted based on the temperature of the frost layer, and the heating manner of the heater is more targeted. And then can guarantee that this defrosting device can be applicable to the evaporimeter and the heater of different grade type, has improved the defrosting efficiency to the evaporimeter, has reduced the useless power loss of heat of changing.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic block diagram of a refrigeration unit provided by an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a defrosting method of a refrigeration equipment provided by the embodiment of the invention;
FIG. 3 is a schematic flow chart of another defrosting method for a refrigeration device provided by the embodiment of the invention;
FIG. 4 is a schematic flow chart of a defrosting method of a refrigerating device according to another embodiment of the invention;
FIG. 5 is a schematic flow chart of a defrosting method for a refrigerating apparatus according to another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a defrosting device of a refrigeration equipment provided by the embodiment of the invention;
fig. 7 is a schematic structural diagram of an electronic device provided in an embodiment of the present invention.
Reference numerals are as follows:
100. an evaporator; 102. a heater; 104. an acquisition module; 106. an adjustment module; 108. a processor; 110. a communication interface; 112. a memory; 114. a communication bus; 116. and a temperature sensor.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
With combined reference to fig. 1 and 2, a first aspect embodiment of the present invention provides a defrosting method for a refrigeration apparatus, including:
According to the defrosting method of the refrigeration equipment provided by the embodiment of the first aspect of the present invention, the actual temperature of the evaporator 100 is obtained, the actual temperature of the evaporator 100 is compared with the freezing point temperature of the frost layer on the evaporator 100, the operating state of the heater 102 is adjusted by comparing the actual temperature of the evaporator 100 with the freezing point temperature of the frost layer, the operating state of the heater 102 can be adjusted based on the frost layer temperature, and the heating manner of the heater 102 is more targeted. Furthermore, the defrosting method can be suitable for evaporators 100 and heaters 102 of different types, the defrosting efficiency of the evaporators 100 is improved, and the useless power loss of the heat exchangers is reduced.
Taking the refrigeration apparatus as an example of a refrigerator, please refer to fig. 1 and fig. 2 continuously, in the defrosting method provided in the embodiment of the present invention, step 100 is used to obtain an actual temperature of the evaporator 100, for example, the actual temperature of the evaporator can be obtained through the temperature sensor 116; the step 200 is to obtain an actual temperature of the evaporator 100, compare the actual temperature of the evaporator 100 with a freezing point temperature of a frost layer on the evaporator 100, and adjust a working state of the heater 102 on the evaporator 100 based on a comparison result after the comparison is completed.
Generally, the freezing temperature of the frost layer mentioned here is 0 degrees. The reason why the freezing point temperature of the frost layer is selected as the reference value for comparison is that in the defrosting process, the frost layer is in a solid-liquid mixed state when reaching the freezing point temperature, at this time, water on the surface of the frost layer needs larger latent heat of evaporation, and in order to avoid that the heat provided by the heater 102 is completely absorbed by the water on the surface of the frost layer, and the heat provided by the heater 102 cannot be applied to defrosting, the freezing point temperature of the frost layer is selected to be compared with the actual temperature of the evaporator 100.
Referring to fig. 3, in the embodiment of the present invention, the following three cases exist between the actual temperature of the evaporator 100 and the freezing temperature of the frost layer:
here, the concept of the preset temperature is introduced, and the reason for introducing the preset temperature is that if the actual temperature of the evaporator 100 reaches the freezing temperature of the frost layer, the operating state of the heater 102 is adjusted, so that a part of the heat released by the heater 102 is absorbed by the water in the frost layer to realize the conversion from the liquid state to the gas state, and thus, the preset temperature lower than the freezing temperature is introduced here. For example, the preset temperature may be-1 degree.
With continued reference to fig. 3, the step of adjusting the operating state of the heater 102 based on the comparison result between the actual temperature and the freezing point temperature of the frost layer respectively includes:
in this step, the heater 102 is periodically turned on and off when the detected actual temperature of the evaporator 100 is lower than the preset temperature, and it is understood that when the actual temperature of the evaporator 100 has not reached the preset temperature, it is proved that the frost layer is still in a solid state, and thus, the heater 102 may be periodically turned on and off to achieve defrosting heating of the frost layer. In addition, the power consumption of the heater 102 can be reduced by periodically turning the heater 102 on and off.
in this step, the detected actual temperature of the evaporator 100 is equal to the preset temperature, and at this time, by adjusting the operating state of the heater 102 to make the actual temperature of the evaporator 100 reach the freezing point temperature, it can be understood that, since the preset temperature is lower than the freezing point temperature, in this step, the heater 102 needs to be controlled to heat the frost layer so that the actual temperature of the evaporator 100 continues to rise and reaches the freezing point temperature.
In this step, the detected actual temperature of the evaporator 100 is greater than the freezing point temperature, and at this time, it is verified that the defrosting of the evaporator 100 is completed, and the defrosting mode is exited by adjusting the operating state of the heater 102, and then the refrigerator may enter the normal refrigeration cycle again.
Referring to fig. 4 and 5 in combination, in the embodiment of the present invention, for the case that the actual temperature is lower than the preset temperature, the heater 102 is periodically turned on and off, and specifically, the control mode may be divided into two different control modes, i.e., periodically turned on and periodically turned off.
For the case where the heater 102 is periodically turned on:
referring to fig. 4, according to an embodiment of the present invention, the step 210 of periodically turning on and off the heater 102, that is, determining that the actual temperature is less than the preset temperature, includes:
in this step, before the heater 102 is turned on, the actual temperature of the evaporator 100 is first detected, after the heater 102 is turned on according to the current turn-on duration, the actual temperature of the evaporator 100 is detected again, and the difference between the two detected actual temperatures of the evaporator 100 is made, so as to obtain the temperature rise difference of the actual temperature of the evaporator 100 before and after the heater 102 is turned on for the current turn-on duration.
For example, before the heater 102 is turned on, the detected actual temperature of the evaporator 100 is T1, after the heater 102 is turned on for the current time period T1, the detected actual temperature of the evaporator 100 is T2 again, and the temperature rise difference between T1 and T2 is Δ T1.
in this step, the temperature rise difference obtained in step 211 is compared with a first preset temperature difference, and if the temperature rise difference is greater than the first preset temperature difference, the next turn-on duration of the heater 102 is correspondingly reduced based on the turn-on duration of this time.
It will be appreciated that if the heater 102 continues to be turned on for the last time, the temperature of the evaporator 100 will rise too fast, and the temperature of the liner and other components around the evaporator 100 will rise as well, which will affect the temperature in the cooling compartment of the refrigerator. Thus, it is desirable to correspondingly reduce the next time the heater 102 is turned on to reduce the rate of temperature rise of the evaporator 100.
For example, the first preset temperature difference may be 2 degrees, and if the temperature rise temperature difference Δ t1 obtained in step 211 is 3 degrees, it is proved that the temperature rise of the evaporator 100 is too fast, and the next turn-on time of the heater 102 needs to be correspondingly reduced.
in this step, the temperature rise temperature difference obtained in step 211 is compared with the second preset temperature difference and the first preset temperature difference, and if the temperature rise temperature difference is within the range of the second preset temperature difference and the first preset temperature difference, it is proved that the current starting time of the heater 102 can meet the normal defrosting requirement.
For example, the first preset temperature difference may be 2 degrees, the second preset temperature difference may be 1 degree, and if the temperature rise temperature difference Δ t1 obtained in step 211 is 1.5 degrees, it is proved that the temperature rise of the evaporator 100 is in a normal state, and it is only necessary to keep the current turn-on duration of the heater 102 to turn on the heater 102 in a circulating manner.
And 214, determining that the temperature rise temperature difference is smaller than a second preset temperature difference, and prolonging the next starting time of the heater 102 based on the starting time of the time.
In this step, the temperature rise difference obtained in step 211 is compared with a second preset temperature difference, and if the temperature rise difference is smaller than the second preset temperature difference, the next turn-on time of the heater 102 is extended based on the turn-on time of this time.
It will be appreciated that if the heater 102 continues to be turned on for the present period of time, the defrost speed will be slowed, and the defrost cycle will be lengthened, which will also result in the temperature in the refrigeration compartment of the refrigerator being affected. Therefore, it is necessary to extend the next turn-on period of the heater 102 based on the present turn-on period of the heater 102 to improve the defrosting efficiency.
For example, the second preset temperature difference may be 1 degree, and if the temperature rise temperature difference Δ t1 obtained in step 211 is 0.5 degree, it is proved that the temperature rise of the evaporator 100 is too slow, and the next turn-on time of the heater 102 needs to be extended based on the turn-on time of the heater 102 this time.
For the case where the heater 102 is periodically turned off:
referring to fig. 5, according to an embodiment of the present invention, the step of periodically turning on and off the heater 102 in step 220, that is, in the step of determining that the actual temperature is less than the preset temperature, includes:
in this step, before the heater 102 is turned off, the actual temperature of the evaporator 100 is first detected, and after the heater 102 is turned off according to the current turning-off duration, the actual temperature of the evaporator 100 is detected again, and the difference between the two detected actual temperatures of the evaporator 100 is made, so as to obtain the temperature rise difference of the actual temperature of the evaporator 100 before and after the heater 102 is turned off for the current turning-off duration.
For example, before the heater 102 is turned off, the detected actual temperature of the evaporator 100 is T3, after the heater 102 is turned off according to the current turning-off time period T2, the detected actual temperature of the evaporator 100 is T4 again, and the temperature rise difference between T3 and T4 is Δ T2.
in this step, the temperature rise difference obtained in step 216 is compared with a third preset temperature difference, and if the temperature rise difference is greater than the third preset temperature difference, the next turn-off time of the heater 102 is correspondingly reduced based on the turn-off time of the heater 102 this time.
It can be understood that if the heater 102 is turned off continuously according to the last turn-off period, the temperature of the evaporator 100 will increase due to the heat conduction and radiation in the evaporator 100, and the temperature of the inner container and other components around the evaporator 100 will also increase, which will affect the temperature in the cooling compartment of the refrigerator. Therefore, it is necessary to reduce the next off period of the heater 102 based on the present off period of the heater 102 to reduce the influence of heat on the inner container, other components and the refrigerating compartment around the evaporator 100.
For example, the third preset temperature difference may be 2 degrees, and if the temperature rise temperature difference Δ t2 obtained in step 216 is 3 degrees, it is proved that the temperature rise process of the evaporator 100 is lengthened, and the next turn-off time period of the heater 102 needs to be correspondingly reduced based on the turn-off time period of this time.
in this step, the temperature rise temperature difference obtained in step 216 is compared with a fourth preset temperature difference and a third preset temperature difference, and if the temperature rise temperature difference is within the range of the fourth preset temperature difference and the third preset temperature difference, it is proved that the current closing time of the heater 102 can meet the normal use requirement.
For example, the third preset temperature difference may be 2 degrees, the fourth preset temperature difference may be 1 degree, and if the temperature rise temperature difference Δ t2 obtained in step 211 is 1.5 degrees, it is proved that the temperature rise of the evaporator 100 belongs to a normal state, and only the current closing time of the heater 102 needs to be maintained.
In this step, the temperature rise difference obtained in step 216 is compared with a fourth preset temperature difference, and if the temperature rise difference is smaller than the fourth preset temperature difference, the next turn-off time of the heater 102 is correspondingly prolonged based on the turn-off time of the heater 102.
It will be appreciated that if the heater 102 continues to be turned off for the current off period, the efficiency of defrosting will be slowed because the heat in the evaporator 100 is not sufficiently conducted and radiated to the top of the evaporator 100. Therefore, it is necessary to correspondingly extend the next off period of the heater 102 based on the present off period to extend the temperature rising process of the evaporator 100.
For example, the fourth preset temperature difference may be 1 degree, and if the temperature rise temperature difference Δ t2 obtained in step 216 is 0.5 degree, it is proved that the temperature rise of the evaporator 100 is too slow, and the next turn-off time period of the heater 102 needs to be correspondingly prolonged based on the turn-off time period of the heater 102 this time.
In the embodiment of the present invention, when the actual temperature of the evaporator 100 in step 220 is equal to the preset temperature, the operating state of the heater 102 is adjusted to make the actual temperature reach the freezing point temperature, which may be specifically divided into two different forms:
the specific situation is as follows:
step 221, determining that the heater 102 is in an on state, and keeping the on time of the heater 102 unchanged based on the last on time so that the actual temperature reaches the freezing point temperature.
In this case, when the actual temperature of the evaporator 100 is equal to the preset temperature, the heater 102 is in an on state, and at this time, the last on period of the heater 102 is maintained to make the actual temperature reach the freezing point temperature.
In other words, in this case, if the heater 102 is in the on state when the actual temperature of the evaporator 100 is equal to the preset temperature, the heater 102 continues to heat without being affected by the adjusted on time, and the heating may continue to be performed for the above on time, or the heating may be performed for the above adjusted on time. This allows the actual temperature of the evaporator 100 to quickly pass through the freezing point temperature, avoiding the frost surface water from fully absorbing the heat provided by the heater 102.
The concrete situation is two:
step 222, determining that the heater 102 is in a closed state, turning on the heater 102, and keeping the next turning-on time of the heater 102 unchanged based on the turning-on time of this time, so that the actual temperature reaches the freezing point temperature.
In this case, when the actual temperature of the evaporator 100 is equal to the preset temperature, the heater 102 is in the off state, at which time, the off state of the heater 102 is immediately terminated, and the heater 102 is turned on and the current on period of the heater 102 is maintained so that the actual temperature reaches the freezing point temperature.
In other words, in this case, if the actual temperature of the evaporator 100 is equal to the preset temperature, the heater 102 is in the off state, and the off state of the heater 102 needs to be terminated immediately, and the off period when the heater 102 is off is not affected by the off period after the adjustment is completed. Meanwhile, the heater 102 is immediately turned on, and heating is performed with the current on-time or the on-time after the adjustment is completed for the previous time. This allows the actual temperature of the evaporator 100 to quickly pass through the freezing point temperature, avoiding the frost surface water from fully absorbing the heat provided by the heater 102.
According to one embodiment of the invention, in the step: determining that the actual temperature is greater than the defrosting exit temperature, wherein the step of exiting defrosting comprises the following steps:
in step 231, after the heater 102 is turned off for a preset time period, the heater 102 is turned on again to make the actual temperature reach the defrosting exit temperature.
In this step, when the actual temperature of the evaporator 100 is greater than the freezing point temperature, the heater 102 is turned off, and after a preset time period, the heater 102 is turned on again to make the actual temperature of the evaporator 100 reach the defrosting exit temperature, thereby completing the defrosting step.
A defrosting method for a refrigeration apparatus according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 5:
firstly, entering a defrosting mode, acquiring the actual temperature of the evaporator 100 through the temperature sensor 116, comparing the actual temperature of the evaporator 100 with a preset temperature, and if the actual temperature is less than the preset temperature, periodically turning on and off the heater 102, specifically, the turning-on duration of the heater 102 after turning on is the turning-on duration of the time, and the turning-off duration of the heater 102 after turning off is the turning-off duration of the time; in the defrosting process, the temperature rise temperature difference of the evaporator 100 before and after the heater 102 is started and the temperature rise temperature difference of the evaporator 100 when and after the heater 102 is closed are obtained through the temperature sensor 116;
secondly, comparing the temperature rise difference of the evaporator 100 before and after the heater 102 is started with a first preset temperature difference and a second preset temperature difference, and if the temperature rise difference is greater than the first preset temperature difference, reducing the next starting time of the heater 102 based on the starting time of the time; if the temperature rise temperature difference is between the second preset temperature difference and the first preset temperature difference, keeping the next starting time of the heater 102 unchanged; if the temperature rise temperature difference is less than the second preset temperature difference, the next turn-on period of the heater 102 is extended based on the turn-on period of this time.
Comparing the temperature rise difference of the evaporator 100 with a third preset temperature difference and a fourth preset temperature difference when the heater 102 is turned off and after the heater is turned off, and if the temperature rise difference is greater than the third preset temperature difference, reducing the next turn-off time of the heater 102 based on the turn-off time of this time; if the temperature rise temperature difference is between the fourth preset temperature difference and the third preset temperature difference, keeping the next turn-off time of the heater 102 unchanged; and if the temperature rise temperature difference is smaller than the fourth preset temperature difference, prolonging the next closing time length of the heater 102 based on the closing time length of the time.
And thirdly, when the actual temperature reaches the preset temperature and the heater 102 is in the on state, keeping the heater 102 on continuously based on the last on time of the heater 102 until the actual temperature exceeds the freezing point temperature and reaches the defrosting exit temperature, and then exiting the defrosting mode.
When the actual temperature reaches the preset temperature and the heater 102 is in the off state, the off state of the heater 102 is immediately ended and the heater 102 is turned on until the actual temperature exceeds the freezing point temperature and reaches the defrosting exit temperature, and then the defrosting mode is exited.
As shown in fig. 6, a second aspect of the present invention provides a defrosting apparatus for a refrigeration apparatus, including:
an obtaining module 104 for obtaining an actual temperature of the evaporator 100;
and an adjusting module 106, configured to adjust an operating state of the heater 102 based on a comparison result of the actual temperature and a freezing point temperature of the frost layer.
According to the defrosting apparatus of the refrigeration device provided by the embodiment of the second aspect of the present invention, the obtaining module 104 obtains the actual temperature of the evaporator 100, and the adjusting module 106 compares the actual temperature of the evaporator 100 with the freezing point temperature of the frost layer on the evaporator 100, so that the operating state of the heater 102 can be adjusted based on the frost layer temperature, and the heating manner of the heater 102 is more targeted. And furthermore, the defrosting device can be suitable for evaporators 100 and heaters 102 of different types, the defrosting efficiency of the evaporators 100 is improved, and the useless power loss of the heat exchangers is reduced.
In a third aspect, embodiments of the present invention provide a refrigeration apparatus, including:
the processor 108, when the processor 108 executes the computer program, the steps of the defrosting method of the refrigeration equipment are realized;
a temperature sensor for acquiring an actual temperature of the evaporator 100;
the processor 108 adjusts the operating state of the heater 102 based on the comparison of the actual temperature to the freezing temperature of the frost layer.
The refrigeration appliance may be a refrigerator, freezer, locker, or the like.
Fig. 7 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 7: a processor 108 (processor), a communication Interface 110 (Communications Interface), a memory 112 (memory), and a communication bus 114, wherein the processor 108, the communication Interface 110, and the memory 112 are configured to communicate with each other via the communication bus 114. The processor 108 may call logic instructions in the memory 112 to perform the following method:
acquiring the actual temperature of the evaporator 100;
the operating state of the heater 102 is adjusted based on the result of the comparison of the actual temperature with the freezing temperature of the frost layer.
Furthermore, the logic instructions in the memory 112 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory 112 (ROM), a Random Access Memory 112 (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes:
acquiring the actual temperature of the evaporator 100;
the operating state of the heater 102 is adjusted based on the result of the comparison of the actual temperature with the freezing temperature of the frost layer.
In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by the processor 108, for example, the computer program includes:
acquiring the actual temperature of the evaporator 100;
the operating state of the heater 102 is adjusted based on the result of the comparison of the actual temperature with the freezing temperature of the frost layer.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on such understanding, the technical solutions in essence or part contributing to the related art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method according to various embodiments or some parts of embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
The above embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (11)
1. A defrosting method of a refrigeration apparatus, comprising:
acquiring the actual temperature of the evaporator;
and adjusting the working state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer.
2. The defrosting method of a refrigerating apparatus according to claim 1, wherein the step of adjusting the operating state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer comprises:
determining that the actual temperature is less than a preset temperature, and periodically turning on and off the heater;
determining that the actual temperature is equal to the preset temperature, and adjusting the working state of the heater to enable the actual temperature to reach the freezing point temperature;
determining that the actual temperature is higher than defrosting exit temperature, and exiting defrosting;
the preset temperature is lower than the freezing point temperature, and the defrosting exit temperature is higher than the freezing point temperature.
3. The defrosting method of a refrigerating apparatus according to claim 2, wherein the step of determining that the actual temperature is less than a preset temperature and periodically turning on and off the heater comprises:
acquiring the temperature rise difference of the evaporator before and after the heater is started for the time;
determining that the temperature rise temperature difference is larger than a first preset temperature difference, and reducing the next starting time of the heater based on the starting time of the time;
determining that the temperature rise temperature difference is larger than a second preset temperature difference and smaller than the first preset temperature difference, and keeping the next starting time of the heater unchanged based on the starting time of the time;
and determining that the temperature rise temperature difference is smaller than the second preset temperature difference, and prolonging the next starting time of the heater based on the starting time of this time.
4. The defrosting method of a refrigerating apparatus according to claim 2, wherein the step of determining that the actual temperature is lower than the preset temperature and periodically turning on and off the heater comprises:
acquiring a temperature rise difference of the evaporator before and after the heater is turned off for the time;
determining that the temperature rise temperature difference is larger than a third preset temperature difference, and reducing the next closing time length of the heater based on the closing time length;
determining that the temperature rise temperature difference is greater than a fourth preset temperature difference and less than a third preset temperature difference, and keeping the next closing time of the heater unchanged based on the closing time of the time;
and determining that the temperature rise temperature difference is smaller than a fourth preset temperature difference, and prolonging the next closing time of the heater based on the closing time of this time.
5. The defrosting method of a refrigerating apparatus according to any one of claims 2 to 4, wherein the step of adjusting the operating state of the heater so that the actual temperature reaches the freezing point temperature comprises:
and determining that the heater is in an opening state, and keeping the opening time of the heater at this time unchanged based on the last opening time until the actual temperature reaches the freezing point temperature.
6. The defrosting method of a refrigerating apparatus according to any one of claims 2 to 4, wherein the step of adjusting the operating state of the heater so that the actual temperature reaches the freezing point temperature comprises:
and determining that the heater is in a closed state, starting the heater, and keeping the next starting time of the heater unchanged based on the starting time of this time until the actual temperature reaches the freezing point temperature.
7. A defrosting method of a refrigerating apparatus according to any one of claims 2 to 4, wherein the step of determining that the actual temperature is greater than a defrosting exit temperature and exiting defrosting comprises:
and after the heater is closed for a preset time, the heater is turned on again until the actual temperature reaches the defrosting exit temperature.
8. A defrosting device of a refrigerating apparatus, comprising:
the acquisition module is used for acquiring the actual temperature of the evaporator;
and the adjusting module is used for adjusting the working state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer.
9. A refrigeration apparatus, comprising:
a processor which, when executing a computer program, carries out the steps of a defrosting method of a refrigeration appliance according to any one of claims 1 to 7;
the temperature sensor is used for acquiring the actual temperature of the evaporator;
and the processor adjusts the working state of the heater based on the comparison result of the actual temperature and the freezing point temperature of the frost layer.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, carries out the steps of a defrosting method of a refrigeration device according to any one of claims 1 to 7.
11. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of a defrosting method of a refrigeration device according to any one of claims 1 to 7.
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