CN115875926B - Refrigerating equipment and defrosting method and device thereof - Google Patents
Refrigerating equipment and defrosting method and device thereof Download PDFInfo
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- CN115875926B CN115875926B CN202110995266.4A CN202110995266A CN115875926B CN 115875926 B CN115875926 B CN 115875926B CN 202110995266 A CN202110995266 A CN 202110995266A CN 115875926 B CN115875926 B CN 115875926B
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- 238000010257 thawing Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000008014 freezing Effects 0.000 claims abstract description 69
- 238000007710 freezing Methods 0.000 claims abstract description 69
- 238000005057 refrigeration Methods 0.000 claims abstract description 47
- 238000004590 computer program Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000000630 rising effect Effects 0.000 description 15
- 230000002035 prolonged effect Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram 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
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 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
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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 and compared with the freezing point temperature of the frost layer on the evaporator, and the working state of the heater can be adjusted based on the temperature of the frost layer by comparing the actual temperature of the evaporator with the freezing point temperature of the frost layer, so that the pertinence of the heating mode of the heater is stronger. And further, the defrosting method can be applied to evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the defrosting device 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
The thick frost in the refrigeration equipment can influence the heat exchange efficiency of the refrigerator, so that the refrigeration capacity and the fresh-keeping capacity of the refrigeration equipment are influenced, and the refrigeration equipment consumes more power.
Taking a refrigerator as an example, in the related art, a current defrosting mode is generally to turn on a heater at the lower part of an evaporator to defrost, and the heater is always turned on during defrosting, and when a defrosting condition is reached, the heater is turned off and defrosting is stopped. According to the defrosting mode, the heater is arranged at the lower part of the evaporator, heat generated by the heater is concentrated at the lower part of the evaporator, the inner container and other parts around the evaporator can be continuously heated, and meanwhile, when the volume of the evaporator is relatively large, the time that the heat at the bottom of the evaporator is transferred 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 is directed to solving at least one of the technical problems existing in the related art. Therefore, the defrosting method of the refrigeration equipment can improve defrosting efficiency and reduce energy consumption.
The invention also provides a defrosting device of the refrigeration equipment.
The invention also provides refrigeration equipment.
The invention further provides electronic equipment.
The invention also proposes a non-transitory computer readable storage medium.
An embodiment of a first aspect of the present invention provides a defrosting method of a refrigeration device, 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 working state of the heater is adjusted by acquiring the actual temperature of the evaporator and comparing the actual temperature of the evaporator with the freezing point temperature of the frost layer on the evaporator, and the working state of the heater can be adjusted based on the temperature of the frost layer by comparing the actual temperature of the evaporator with the freezing point temperature of the frost layer, so that the pertinence of the heating mode of the heater is stronger. And further, the defrosting method can be applied to evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the defrosting device is reduced.
According to one embodiment of the present invention, the step of adjusting the operation state of the heater based on the comparison result of the actual temperature and 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;
the preset temperature is smaller than the freezing point temperature, and the defrosting exit temperature is larger than the freezing point temperature.
According to one embodiment of the present invention, the step of determining that the actual temperature is less than a preset temperature, periodically turning on and off the heater, includes:
acquiring the temperature rise temperature difference of the evaporator before and after the heater is started for the current opening time;
determining that the temperature rise temperature difference is larger than a first preset temperature difference, and reducing the next starting time length of the heater based on the current starting time length;
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 opening time of the heater unchanged based on the current opening 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 current starting time.
According to one embodiment of the present invention, the step of determining that the actual temperature is less than a preset temperature, periodically turning on and off the heater, includes:
acquiring the temperature rise temperature difference of the evaporator before and after the closing time of the heater is closed;
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 larger than a fourth preset temperature difference and smaller than the third preset temperature difference, and keeping the next closing time length of the heater unchanged based on the closing time length;
and determining that the temperature rise temperature difference is smaller than the fourth preset temperature difference, and prolonging the next closing time of the heater based on the closing time.
According to one embodiment of the present invention, the step of adjusting the operation state of the heater so that the actual temperature reaches the freezing point temperature includes:
and determining that the heater is in an on state, and keeping the current on time of the heater unchanged based on the last on time until the actual temperature reaches the freezing point temperature.
According to one embodiment of the present invention, the step of adjusting the operation state of the heater so that the actual temperature reaches the freezing point temperature includes:
and determining that the heater is in a closed state, starting the heater and maintaining the current starting time of the heater so as to enable the actual temperature to reach the freezing point temperature.
According to one 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, restarting the heater until the actual temperature reaches the defrosting exit temperature.
An embodiment of a second aspect of the present invention provides a defrosting apparatus of a refrigeration device, 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 obtained through the obtaining module, and the actual temperature of the evaporator is compared with the freezing point temperature of the frost layer on the evaporator through the adjusting module, so that the working state of the heater can be adjusted based on the frost layer temperature, and the heating mode of the heater is more specific. And the defrosting device can be applicable to evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the defrosting device is reduced.
An embodiment of a third aspect of the present invention provides a refrigeration apparatus, including:
a processor, wherein the processor executes a computer program to realize the steps of the defrosting method of the refrigeration equipment;
a temperature sensor for acquiring an actual temperature of the evaporator;
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.
An embodiment of a fourth aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the defrosting method of the refrigeration device described above when the program is executed.
A fifth aspect of the present invention provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the defrosting method of a refrigeration appliance described above.
The above 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 working state of the heater is adjusted by acquiring the actual temperature of the evaporator and comparing the actual temperature of the evaporator with the freezing point temperature of the frost layer on the evaporator, and the working state of the heater can be adjusted based on the temperature of the frost layer by comparing the actual temperature of the evaporator with the freezing point temperature of the frost layer, so that the pertinence of the heating mode of the heater is stronger. And further, the defrosting method can be applied to evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the defrosting device is reduced.
Further, according to the defrosting device of the refrigeration equipment provided by the embodiment of the second aspect of the invention, the acquiring module acquires the actual temperature of the evaporator, and the adjusting module compares the actual temperature of the evaporator with the freezing point temperature of the frost layer on the evaporator, so that the working state of the heater can be adjusted based on the frost layer temperature, and the heating mode of the heater is more specific. And the defrosting device can be applicable to evaporators and heaters of different types, the defrosting efficiency of the evaporators is improved, and the useless power loss of the defrosting device is reduced.
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 the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic structural view of a refrigeration apparatus provided by an embodiment of the present invention;
fig. 2 is a schematic flow chart of a defrosting method of a refrigeration device according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of another defrosting method for refrigeration equipment provided by an embodiment of the invention;
FIG. 4 is a schematic flow chart of a defrosting method of another refrigeration equipment provided by an embodiment of the invention;
fig. 5 is a schematic flow chart of a defrosting method of another refrigeration equipment provided by the embodiment of the invention;
fig. 6 is a schematic structural view of a defrosting device of a refrigeration apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device provided in an embodiment of the present invention.
Reference numerals:
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. a temperature sensor.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, 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 describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., 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, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Referring to fig. 1 and 2 in combination, an embodiment of a first aspect of the present invention provides a defrosting method of a refrigeration apparatus, including:
step 100, obtaining the actual temperature of the evaporator 100;
step 200, adjusting the working state of the heater 102 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 working state of the heater 102 is adjusted by acquiring the actual temperature of the evaporator 100 and comparing the actual temperature of the evaporator 100 with the freezing point temperature of the frost layer on the evaporator 100, and the working state of the heater 102 can be adjusted based on the frost layer temperature by comparing the actual temperature of the evaporator 100 with the freezing point temperature of the frost layer, so that the pertinence of the heating mode of the heater 102 is stronger. And further, the defrosting method can be applied to evaporators 100 and heaters 102 of different types, the defrosting efficiency of the evaporators 100 is improved, and the useless power loss of the defrosting device is reduced.
Taking a refrigerator as an example, please continue to refer to fig. 1 and fig. 2, in the defrosting method provided by the embodiment of the present invention, step 100 is used to obtain the actual temperature of the evaporator 100, for example, the actual temperature of the evaporator can be obtained through the temperature sensor 116; step 200 is used for comparing the actual temperature of the evaporator 100 with the freezing point temperature of the frost layer on the evaporator 100 after the actual temperature of the evaporator 100 is obtained, and adjusting the working state of the heater 102 on the evaporator 100 based on the comparison result after the comparison is completed.
Typically, the freezing point temperature of the frost layer referred to herein is 0 degrees. The reason why the freezing point temperature of the frost layer is selected as the reference value for comparison is that the frost layer is in a solid-liquid mixed state when reaching the freezing point temperature during defrosting, and the water on the surface of the frost layer needs a larger evaporation latent heat at this time, so as to avoid that the water on the surface of the frost layer absorbs the heat provided by the heater 102 completely, and the heat provided by the heater 102 cannot be applied to defrosting, so that 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, there are the following three cases 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 because if the actual temperature of the evaporator 100 reaches the freezing temperature of the frost layer, the operation state of the heater 102 is adjusted again, which causes a part of heat released from the heater 102 to be absorbed by water in the frost layer to be converted from the liquid state to the gas state, and thus, the preset temperature less than the freezing temperature is introduced. For example, the preset temperature may be-1 degrees.
With continued reference to fig. 3, in the step of adjusting the operation state of the heater 102 based on the comparison result between the actual temperature and the freezing temperature of the frost layer, the steps respectively include:
step 210, determining that the actual temperature is less than the preset temperature, and periodically turning on and off the heater 102;
in this step, the detected actual temperature of the evaporator 100 is less than the preset temperature, and the heater 102 is periodically turned on and off, and it is understood that when the actual temperature of the evaporator 100 has not reached the preset temperature, it is verified that the frost layer is still in a solid state at this time, 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 also be reduced by periodically turning the heater 102 on and off.
Step 220, determining that the actual temperature is equal to the preset temperature, and adjusting the working state of the heater 102 to make the actual temperature reach the freezing point temperature;
in this step, the detected actual temperature of the evaporator 100 is equal to the preset temperature, and at this time, by adjusting the operation state of the heater 102 so that the actual temperature of the evaporator 100 reaches the freezing temperature, it is understood that since the preset temperature is lower than the freezing temperature, it is necessary to control the heater 102 to heat the frost layer so that the actual temperature of the evaporator 100 continues to rise and reaches the freezing temperature in this step.
Step 230, determining that the actual temperature is greater than the 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.
In this step, the detected actual temperature of the evaporator 100 is greater than the freezing point temperature, at which point it is confirmed that the evaporator 100 has been frosted, and then the defrosting mode is exited by adjusting the operation state of the heater 102, and then the refrigerator can enter the normal refrigerating cycle again.
Referring to fig. 4 and 5 in combination, in the embodiment of the present invention, for the case where the actual temperature is less than the preset temperature, the heater 102 is periodically turned on and off, in particular, two different control modes may be divided into periodically turned on and periodically turned off.
For the case where the heater 102 is periodically turned on:
referring to fig. 4, in step 210, that is, in the step of determining that the actual temperature is less than the preset temperature, the heater 102 is periodically turned on and off, according to an embodiment of the present invention, includes:
step 211, obtaining a temperature rise temperature difference of the evaporator 100 before and after the heater 102 is started for the current starting time;
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 for the duration of this time, the actual temperature of the evaporator 100 is detected again, and the difference between the detected actual temperatures of the evaporator 100 is made to obtain the temperature rise temperature difference of the actual temperatures of the evaporator 100 before and after the duration of this time when the heater 102 is turned on.
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 turn-on period T1, the detected actual temperature of the evaporator 100 is T2 again, and the temperature rise difference between T1 and T2 is Δt1.
Step 212, determining that the temperature rise temperature difference is greater than a first preset temperature difference, and reducing the next turn-on duration of the heater 102 based on the turn-on duration;
in this step, the temperature rising temperature difference obtained in step 211 is compared with a first preset temperature difference, and if the temperature rising temperature difference is greater than the first preset temperature difference, the next turn-on duration of the heater 102 is correspondingly reduced based on the current turn-on duration.
It will be appreciated that if the heater 102 is continuously turned on for the last time, the temperature of the evaporator 100 will rise too fast, and the temperature of the inner container and other parts around the evaporator 100 will also rise, which will affect the temperature in the refrigerating compartment of the refrigerator. Accordingly, it is necessary to correspondingly reduce the next turn-on period of the heater 102 to reduce the temperature rise rate of the evaporator 100.
For example, the first preset temperature difference may be 2 degrees, and if the temperature rise temperature difference Δt1 obtained in step 211 is 3 degrees, the temperature rise of the evaporator 100 is proved to be too fast, and the next turn-on duration of the heater 102 needs to be correspondingly reduced.
Step 213, determining that the second preset temperature difference is smaller than the temperature rising temperature difference and the temperature rising temperature difference is smaller than the first preset temperature difference, and keeping the next turn-on duration of the heater 102 unchanged based on the current turn-on duration;
in this step, the temperature rising temperature difference obtained in step 211 is compared with the second preset temperature difference and the first preset temperature difference, and if the temperature rising temperature difference is within the range of the second preset temperature difference and the first preset temperature difference, it is proved that the current turn-on duration 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 Δt1 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 only the current turn-on duration of the heater 102 is required to be maintained to circularly turn on the heater 102.
Step 214, determining that the temperature rise temperature difference is smaller than the second preset temperature difference, and prolonging the next turn-on duration of the heater 102 based on the turn-on duration.
In this step, the temperature rise temperature difference obtained in step 211 is compared with a second preset temperature difference, and if the temperature rise temperature difference is smaller than the second preset temperature difference, the next turn-on duration of the heater 102 is prolonged based on the current turn-on duration.
It will be appreciated that if the heater 102 is continuously turned on for the current duration, the defrosting speed is reduced, and the defrosting cycle is prolonged, which also results in the temperature in the refrigerating compartment of the refrigerator being affected. Thus, it is necessary to extend the next turn-on period of the heater 102 based on the current turn-on period of the heater 102 to improve defrosting efficiency.
For example, the second preset temperature difference may be 1 degree, and if the temperature rise temperature difference Δt1 obtained in step 211 is 0.5 degree, the temperature rise of the evaporator 100 is proved to be too slow, and the next turn-on duration of the heater 102 needs to be prolonged based on the current turn-on duration of the heater 102.
For the case where the heater 102 is periodically turned off:
referring to fig. 5, in step 220, i.e., in the step of determining that the actual temperature is less than the preset temperature, the heater 102 is periodically turned on and off, according to one embodiment of the present invention, comprising:
step 216, obtaining a temperature rise temperature difference of the evaporator 100 before and after the heater 102 is turned off for the current turn-off time;
in this step, before the heater 102 is turned off, the actual temperature of the evaporator 100 is first detected, after the heater 102 is turned off for the current turn-off period, the actual temperature of the evaporator 100 is detected again, and the difference between the detected actual temperatures of the evaporator 100 is made to obtain the temperature rise temperature difference of the actual temperatures of the evaporator 100 before and after the heater 102 is turned off for the current turn-off period.
For example, before the heater 102 is turned off, the detected actual temperature of the evaporator 100 is T3, and after the heater 102 is turned off for the current turn-off period T2, the detected actual temperature of the evaporator 100 is T4 again, and the temperature rise difference between T3 and T4 is Δt2.
Step 217, determining that the temperature rise temperature difference is greater than a third preset temperature difference, and reducing the next closing time length of the heater 102 based on the closing time length;
in this step, the temperature rising temperature difference obtained in step 216 is compared with a third preset temperature difference, and if the temperature rising temperature difference is greater than the third preset temperature difference, the next closing time period of the heater 102 is correspondingly reduced based on the current closing time period of the heater 102.
It will be appreciated that if the heater 102 is turned off for the last time, the heat conduction and radiation in the evaporator 100 will cause the temperature rise of the evaporator 100 to be longer, and thus the temperature of the inner container and other parts around the evaporator 100 will be also raised, which will cause the temperature in the refrigerating compartment of the refrigerator to be affected. Accordingly, it is desirable to correspondingly reduce the next turn-off period of the heater 102 based on the current turn-off period of the heater 102 to reduce the heat impact on the peripheral bladders, other components, and the refrigeration compartments of the evaporator 100.
For example, the third preset temperature difference may be 2 degrees, and if the temperature rise temperature difference Δt2 obtained in step 216 is 3 degrees, it is proved that the temperature rise process of the evaporator 100 is long, and the next closing time period of the heater 102 needs to be correspondingly reduced based on the current closing time period.
Step 218, determining that the fourth preset temperature difference is smaller than the temperature rising temperature difference and the temperature rising temperature difference is smaller than the third preset temperature difference, and keeping the next closing time of the heater 102 unchanged based on the closing time;
in this step, the temperature rising temperature difference obtained in step 216 is compared with the fourth preset temperature difference and the third preset temperature difference, respectively, and if the temperature rising temperature difference is within the range of the fourth preset temperature difference and the third preset temperature difference, it is proved that the closing duration of the current 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 Δt2 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 only the current turn-off duration of the heater 102 needs to be maintained.
Step 219, determining that the temperature rising temperature difference is smaller than the fourth preset temperature difference, and extending the next closing time of the heater 102 based on the current closing time of the heater 102.
In this step, the temperature rise temperature difference obtained in step 216 is compared with a fourth preset temperature difference, and if the temperature rise temperature difference is smaller than the fourth preset temperature difference, the next closing time period of the heater 102 is correspondingly prolonged based on the current closing time period of the heater 102.
It will be appreciated that if the heater 102 continues to be turned off for the current duration of the turn off, the effectiveness of defrosting may be reduced due to insufficient conduction and radiation of heat from the evaporator 100 to the top of the evaporator 100. Thus, it is necessary to correspondingly lengthen the next turn-off period of the heater 102 based on the current turn-off period to lengthen the temperature rise process of the evaporator 100.
For example, the fourth preset temperature difference may be 1 degree, and if the temperature rise temperature difference Δt2 obtained in the step 216 is 0.5 degree, it is proved that the temperature rise of the evaporator 100 is too slow, and the corresponding time period for the next time of closing the heater 102 needs to be prolonged based on the time period for the current time of closing the heater 102.
In the embodiment of the present invention, for the case that the actual temperature of the evaporator 100 in step 220 is equal to the preset temperature, the working state of the heater 102 is adjusted so that the actual temperature reaches the freezing point temperature, which can be specifically divided into two different forms:
specific case one:
step 221, determining that the heater 102 is in an on state, and keeping the current 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 so that the actual temperature reaches the freezing 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 be heated, and is not affected by the adjusted on period, and may continue to be heated for the last on period, or for the on period after the last adjustment is completed. This allows the actual temperature of the evaporator 100 to quickly pass the freezing temperature, avoiding the water on the surface of the frost from absorbing all of the heat provided by the heater 102.
And the specific case is as follows:
step 222, determining that the heater 102 is in a closed state, turning on the heater 102 and keeping the next turn-on duration of the heater 102 unchanged based on the current turn-on duration, 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 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, at which time 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 turned on immediately, and the heating is performed in the current turn-on time period, or in the turn-on time period after the last adjustment. This allows the actual temperature of the evaporator 100 to quickly pass the freezing temperature, avoiding the water on the surface of the frost from absorbing all of the heat provided by the heater 102.
According to one embodiment of the invention, at the step: the step of determining that the actual temperature is greater than the defrosting exit temperature and exiting defrosting comprises the following steps:
step 231, after the heater 102 is turned off for a preset period of time, 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 period of time, the heater 102 is turned on again and the actual temperature of the evaporator 100 reaches the defrosting exit temperature, thereby completing the defrosting step.
The following describes a defrosting method of a refrigeration apparatus according to an embodiment of the first aspect of the present invention with reference to fig. 1 to 5:
firstly, entering a defrosting mode, acquiring the actual temperature of the evaporator 100 through a temperature sensor 116, comparing the actual temperature of the evaporator 100 with a preset temperature, and if the actual temperature is smaller than the preset temperature, periodically turning on and off the heater 102, wherein specifically, the turn-on duration after the heater 102 is turned on is the turn-on duration at this time, and the turn-off duration after the heater 102 is turned off is the turn-off duration at this time; in the defrosting process, the temperature rising temperature difference of the evaporator 100 before and after the heater 102 is started and the temperature rising temperature difference of the evaporator 100 after the heater 102 is closed are obtained through the temperature sensor 116;
secondly, comparing the temperature rise temperature difference of the evaporator 100 before and after the heater 102 is started with the first preset temperature difference and the second preset temperature difference, and if the temperature rise temperature difference is larger than the first preset temperature difference, reducing the next starting time of the heater 102 based on the current starting time; if the temperature rise temperature difference is between the second preset temperature difference and the first preset temperature difference, keeping the time length of the heater 102 which is started next time unchanged; if the temperature rise temperature difference is smaller than the second preset temperature difference, the next turn-on duration of the heater 102 is prolonged based on the current turn-on duration.
Comparing the temperature rise temperature difference of the closed evaporator 100 with the third preset temperature difference and the fourth preset temperature difference when the heater 102 is closed, and reducing the closing time of the heater 102 next time based on the closing time if the temperature rise temperature difference is larger than the third preset temperature difference; if the temperature rise temperature difference is between the fourth preset temperature difference and the third preset temperature difference, keeping the next closing time length of the heater 102 unchanged; if the temperature rise temperature difference is smaller than the fourth preset temperature difference, the next closing time of the heater 102 is prolonged based on the closing time.
Again, when the actual temperature reaches the preset temperature and the heater 102 is in an on state, the defrosting mode is then exited based on the last on period of the heater 102 and keeping the heater 102 continuously on until the actual temperature exceeds the freezing point temperature and the defrosting exit temperature is reached.
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 the defrosting exit temperature is reached, and then the defrosting mode is exited.
As shown in fig. 6, an embodiment of a second aspect of the present invention provides a defrosting apparatus of a refrigeration device, including:
an acquisition module 104 for acquiring an actual temperature of the evaporator 100;
the adjustment module 106 is configured to adjust an operation state of the heater 102 based on a comparison result of the actual temperature and the freezing temperature of the frost layer.
According to the defrosting device of the refrigeration equipment provided by the embodiment of the second aspect of the present invention, the acquiring module 104 acquires 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 working state of the heater 102 can be adjusted based on the frost layer temperature, and the heating mode of the heater 102 is more targeted. And further, the defrosting device can be applicable to evaporators 100 and heaters 102 of different types, defrosting efficiency for the evaporators 100 is improved, and useless power loss of the defrosting device is reduced.
An embodiment of a third aspect of the present invention provides a refrigeration apparatus, including:
a processor 108, wherein the processor 108 implements the steps of the defrosting method of the refrigeration equipment when executing the computer program;
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 and the freezing temperature of the frost.
The refrigeration device may be a refrigerator, freezer, locker, or the like.
Fig. 7 illustrates a physical schematic diagram of an electronic device, as shown in fig. 7, which may include: processor 108 (processor), communication interface 110 (Communications Interface), memory 112 (memory), and communication bus 114, wherein processor 108, communication interface 110, memory 112 communicate with each other via communication bus 114. The processor 108 may call logic instructions in the memory 112 to perform the following method:
acquiring an actual temperature of the evaporator 100;
the operation state of the heater 102 is adjusted based on the result of comparing the actual temperature with the freezing temperature of the frost layer.
Further, the logic instructions in the memory 112 described above may be implemented in the form of software functional units and may be 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 essentially or in a part contributing to the related art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform 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, random Access Memory), a magnetic disk or an optical disk, or other various media capable of storing program codes.
Embodiments of the present invention disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the method embodiments described above, for example comprising:
acquiring an actual temperature of the evaporator 100;
the operation state of the heater 102 is adjusted based on the result of comparing the actual temperature with the freezing temperature of the frost layer.
In another aspect, embodiments of the present invention also provide a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by the processor 108 is implemented to perform the transmission method provided in the above embodiments, for example, including:
acquiring an actual temperature of the evaporator 100;
the operation state of the heater 102 is adjusted based on the result of comparing the actual temperature with the freezing temperature of the frost layer.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on such understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the related art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
The above embodiments are only for illustrating the present invention, and are not limiting of the present invention. While the invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and it is intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A method of defrosting a refrigeration appliance comprising:
acquiring the actual temperature of the evaporator;
based on the comparison result of the actual temperature and the freezing point temperature of the frost layer, adjusting the working state of the heater;
the step of 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 comprises the following steps:
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;
the preset temperature is smaller than the freezing point temperature, and the defrosting exit temperature is larger than the freezing point temperature.
2. The defrosting method of a refrigeration appliance according to claim 1, wherein the step of determining that the actual temperature is less than a preset temperature, periodically turning on and off the heater, comprises:
acquiring the temperature rise temperature difference of the evaporator before and after the heater is started for the current opening time;
determining that the temperature rise temperature difference is larger than a first preset temperature difference, and reducing the next starting time length of the heater based on the current starting time length;
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 opening time of the heater unchanged based on the current opening 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 current starting time.
3. The defrosting method of a refrigeration appliance according to claim 1, wherein the step of determining that the actual temperature is less than a preset temperature, periodically turning on and off the heater, comprises:
acquiring the temperature rise temperature difference of the evaporator before and after the closing time of the heater is closed;
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 larger than a fourth preset temperature difference and smaller than the third preset temperature difference, and keeping the next closing time length of the heater unchanged based on the closing time length;
and determining that the temperature rise temperature difference is smaller than the fourth preset temperature difference, and prolonging the next closing time of the heater based on the closing time.
4. A defrosting method of a refrigeration device according to any one of claims 1 to 3, characterized in that said step of adjusting the operation state of said heater so that said actual temperature reaches said freezing temperature comprises:
and determining that the heater is in an on state, and keeping the current on time of the heater unchanged based on the last on time until the actual temperature reaches the freezing point temperature.
5. A defrosting method of a refrigeration device according to any one of claims 1 to 3, characterized in that said step of adjusting the operation state of said heater so that said actual temperature reaches said freezing 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 current starting time until the actual temperature reaches the freezing point temperature.
6. A defrosting method of a refrigeration appliance according to any one of claims 1 to 3 wherein said step of determining that said actual temperature is greater than a defrost exit temperature comprises:
and after the heater is closed for a preset time, restarting the heater until the actual temperature reaches the defrosting exit temperature.
7. A defrosting device of a refrigeration apparatus, comprising:
the acquisition module is used for acquiring the actual temperature of the evaporator;
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;
the adjusting module is used for determining that the actual temperature is smaller 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;
the preset temperature is smaller than the freezing point temperature, and the defrosting exit temperature is larger than the freezing point temperature.
8. A refrigeration appliance, comprising:
a processor implementing the steps of the defrosting method of a refrigeration appliance according to any one of claims 1 to 6 when executing a computer program;
a temperature sensor for acquiring an actual temperature of the evaporator;
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.
9. 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 implements the steps of the defrosting method of a refrigeration device according to any of claims 1 to 6 when the program is executed.
10. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the steps of the defrosting method of a refrigeration appliance according to any one of claims 1 to 6.
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