Method and device for controlling defrosting of evaporator, refrigeration equipment and computer readable storage medium

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses a method for controlling defrosting of an evaporator, which is applied to refrigeration equipment comprising the evaporator. The evaporator comprises an ultrasonic generator, and the method comprises the steps that the ultrasonic generator is controlled to enter a detection mode, and ultrasonic waves used for detecting the thickness of a frost layer are sent. The frosting condition on the surface of the evaporator is detected through ultrasonic waves. And under the condition that the frosting condition meets the first defrosting condition, the ultrasonic generator is controlled to enter a defrosting mode, and ultrasonic waves are sent for resonance defrosting. Resonance defrosting can be carried out only under the condition that defrosting is needed according to the ultrasonic frosting condition. The frost on the surface of the evaporator can be removed with lower energy consumption under the condition that the refrigeration effect of equipment is not influenced. The invention further discloses a device for controlling defrosting of the evaporator, refrigeration equipment and a computer readable storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method and device for controlling evaporator defrosting, refrigeration equipment, and a computer-readable storage medium. Background Art

[0002] The evaporator is an important component of refrigerators, air conditioners and other refrigeration equipment. The liquid refrigerant evaporates at low temperature at the evaporator, absorbs heat from the outside and condenses to achieve refrigeration. The ambient temperature at the evaporator is low, so water vapor is easy to frost at the evaporator. Frosting of the evaporator will reduce the heat exchange efficiency and may also produce a vicious cycle to increase the degree of frost. Therefore, frost on the evaporator needs to be dealt with quickly. At present, the most common method of defrosting the evaporator is heating defrosting, which heats the evaporator by setting a heating wire to melt the frost layer. However, heating defrosting will affect the temperature of the heat exchanger and even the refrigeration equipment, which will have a great impact on the refrigeration effect of the equipment.

[0003] Related technologies disclose an ultrasonic resonance defrosting method, which includes installing an ultrasonic transducer on the evaporator, adjusting the ultrasonic transducer to be in a resonant working state, and driving the ultrasonic transducer with an ultrasonic power supply to perform ultrasonic defrosting in an intermittent loading manner. The principle of ultrasonic defrosting is to stimulate the resonance of frost crystals by emitting ultrasonic waves that are consistent with the natural frequency of frost crystals, thereby transmitting energy to the frost layer and causing it to vibrate and fall off. Compared with heating defrosting, ultrasonic defrosting has less impact on the refrigeration effect of refrigeration equipment.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Although the relevant technology can reduce the impact of defrosting on the effect of refrigeration equipment, the ultrasonic defrosting in the relevant technology adopts intermittent defrosting, that is, it runs at a predetermined interval and working time during the operation of the refrigeration equipment. It lacks judgment on the actual frosting situation of the evaporator and is easy to run repeatedly when defrosting is not needed, resulting in energy waste.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a method and apparatus for controlling the defrosting of an evaporator, a refrigeration device, and a computer-readable storage medium, which can perform defrosting with lower energy consumption without affecting the refrigeration effect of the equipment according to the actual frosting condition of the evaporator.

[0009] In some embodiments, the method includes: controlling the ultrasonic generator to enter a detection mode and sending ultrasonic waves for detecting the thickness of the frost layer; using ultrasonic waves to detect the frosting condition on the surface of the evaporator; when the frosting condition meets the first defrosting condition, controlling the ultrasonic generator to enter a defrosting mode and sending ultrasonic waves for resonance defrosting.

[0010] In some embodiments, using ultrasound to detect the frosting condition on the evaporator surface includes: obtaining the feedback duration of the ultrasound used to detect the thickness of the frost layer; taking the inverse of the feedback duration of the ultrasound as the feedback value; wherein, the larger the feedback value, the more serious the frosting on the evaporator surface.

[0011] In some embodiments, the first defrost condition includes: a feedback value is within a resonance defrost interval.

[0012] In some embodiments, the method further comprises: determining a duration of the resonance defrosting according to the feedback value; wherein the larger the feedback value is, the longer the duration of the resonance defrosting is.

[0013] In some embodiments, the evaporator further includes a heating wire, and the method further includes: when the feedback value is greater than the maximum value of the resonance defrost interval, starting the heating wire to perform heating and defrosting.

[0014] In some embodiments, the method further includes: during the heating and defrosting process, detecting the ultrasonic feedback duration; when it is detected during the heating and defrosting process that the ultrasonic feedback duration is within the resonance defrosting interval, controlling the ultrasonic generator to enter the defrosting mode and sending ultrasonic waves for resonance defrosting.

[0015] In some embodiments, the method further includes: starting the heating wire for heating and defrosting after the resonance defrosting is performed n times; or starting the heating wire for heating and defrosting after the total duration of the resonance defrosting reaches m minutes; wherein n is greater than or equal to 5, and m is greater than or equal to 15.

[0016] In some embodiments, the device for controlling evaporator defrosting includes a processor and a memory storing program instructions. The processor is configured to execute the above-mentioned method for controlling evaporator defrosting when running the program instructions.

[0017] In some embodiments, the refrigeration device comprises: a refrigeration device body and the above-mentioned device for controlling evaporator defrosting, which is installed on the refrigeration device body. The refrigeration device body comprises an evaporator, and the evaporator is provided with an ultrasonic generator, a vibration plate and an ultrasonic transducer.

[0018] In some embodiments, the vibration plates are arranged on both sides of the evaporator; the ultrasonic generator is arranged on the vibration plate, and sends an electrical signal of a specific frequency to the ultrasonic transducer when performing resonance defrosting; the ultrasonic transducer is arranged on the vibration plate and is electrically connected to the ultrasonic generator, and is used to receive the electrical signal sent by the ultrasonic generator, and convert the energy into mechanical energy, causing vibration, and driving the vibration plate to vibrate at a specific frequency.

[0019] In some embodiments, the computer-readable storage medium stores program instructions. When the program instructions are executed, the computer executes the method for controlling evaporator defrosting as described above.

[0020] The method and device for controlling evaporator defrosting, refrigeration equipment, and computer-readable storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] By sending ultrasonic waves for detecting the thickness of the frost layer and receiving reflected sound waves, the thickness of the frost layer of the evaporator can be detected by the reflection of ultrasonic waves, thereby realizing the detection and analysis of the frosting condition on the surface of the evaporator. When the frosting condition meets the first defrosting condition, the ultrasonic generator is controlled to enter the defrosting mode and send ultrasonic waves for resonance defrosting. Resonance defrosting can be performed only when defrosting is required according to the ultrasonic frosting condition. Frost on the surface of the evaporator can be removed with lower energy consumption without affecting the refrigeration effect of the equipment.

[0022] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0024] Figure 1 It is a schematic diagram of the system environment for resonant defrosting of the evaporator;

[0025] Figure 2 is a schematic diagram of a method for controlling evaporator defrosting provided by an embodiment of the present disclosure;

[0026] Figure 3 is a schematic diagram of another method for controlling evaporator defrosting provided by an embodiment of the present disclosure;

[0027] Figure 4 is a schematic diagram of another method for controlling evaporator defrosting provided by an embodiment of the present disclosure;

[0028] Figure 5 is a schematic diagram of an evaporator defrosting system environment with a heating wire according to an embodiment of the present disclosure;

[0029] Figure 6 is a schematic diagram of another method for controlling evaporator defrosting provided by an embodiment of the present disclosure;

[0030] Figure 7 is a schematic diagram of a device for controlling defrosting of an evaporator provided in an embodiment of the present disclosure;

[0031] Figure 8 It is a schematic diagram of a refrigeration device provided in an embodiment of the present disclosure.

[0032] Reference numerals:

[0033] 10: evaporator; 20: ultrasonic generator; 30: ultrasonic transducer; 40: vibration plate; 50: heating wire;

[0034] 60: Device for controlling defrosting of the evaporator;

[0035] 601: processor; 602: memory; 603: communication interface; 604: bus 70: refrigeration equipment. DETAILED DESCRIPTION

[0036] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0037] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0038] Unless otherwise stated, the term "plurality" means two or more.

[0039] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0040] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0041] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0042] The evaporator is an important component of the refrigerant circulation system in the refrigeration system. The liquid refrigerant evaporates at low temperature at the evaporator, and then absorbs heat from the outside to condense to achieve refrigeration. The ambient temperature at the evaporator is low, so water vapor is easy to frost at the evaporator. Frosting of the evaporator will reduce the cooling effect of the refrigeration equipment and requires defrosting.

[0043] Figure 1 Schematic diagram of the implementation environment of the embodiment of the present disclosure. Figure 1 As shown, the implementation environment in the refrigeration device may include an evaporator 10, an ultrasonic generator 20, an ultrasonic transducer 30, a resonance plate 40 and a processor (not shown in the figure).

[0044] The vibration plates 40 are disposed on both sides of the evaporator 10 for transmitting vibration.

[0045] The ultrasonic generator 20 is disposed on the vibration plate 40 and emits an electrical signal of a specific frequency to the ultrasonic transducer 30 when performing resonance defrosting.

[0046] The ultrasonic transducer 30 is arranged on the vibration plate 40 and is electrically connected to the ultrasonic generator 20. It is used to receive the electrical signal emitted by the ultrasonic generator 20 and convert the energy into mechanical energy, causing vibration, driving the vibration plate 40 to vibrate at a specific frequency, thereby emitting ultrasonic waves with the same natural frequency as the frost crystals.

[0047] The processor is connected with the ultrasonic generator and the ultrasonic transducer board.

[0048] In the disclosed embodiment, the system for ultrasonic resonance defrosting of the evaporator includes an evaporator 10, an ultrasonic generator 20, an ultrasonic transducer 30 and a resonance plate 40. The principle of ultrasonic resonance defrosting is to emit an ultrasonic wave with the same frequency as the natural frequency of the frost crystals, induce resonance, conduct energy to the frost crystals, and peel off the frost layer from the evaporator 10 through vibration.

[0049] Combination Figure 2 As shown, the embodiment of the present disclosure provides a method for controlling evaporator defrosting, comprising:

[0050] S201, the processor controls the ultrasonic generator to enter a detection mode, and sends ultrasonic waves for detecting the thickness of the frost layer.

[0051] S202, using ultrasonic waves to detect the frosting condition on the surface of the evaporator.

[0052] S203: When the frosting condition meets the first defrosting condition, the processor controls the ultrasonic generator to enter the defrosting mode and sends ultrasonic waves for resonance defrosting.

[0053] By adopting the method for controlling the defrosting of the evaporator provided by the embodiment of the present disclosure, the thickness of the frost layer of the evaporator can be detected by using the reflection of ultrasonic waves, so as to detect and analyze the frosting condition on the surface of the evaporator. When the frosting condition meets the first defrosting condition, the ultrasonic generator is controlled to enter the defrosting mode and send ultrasonic waves for resonance defrosting. Resonance defrosting can be performed only when defrosting is required according to the ultrasonic frosting condition. Frost on the surface of the evaporator can be removed with lower energy consumption without affecting the refrigeration effect of the equipment.

[0054] Optionally, using ultrasound to detect the frosting condition on the evaporator surface includes: obtaining the feedback duration of ultrasound for detecting the thickness of the frost layer, taking the reciprocal of the feedback duration of ultrasound as a feedback value, wherein the larger the feedback value, the more serious the frosting on the evaporator surface.

[0055] Since the time it takes for ultrasonic waves to be sent and reflected is very short, especially after the evaporator is frosted, the feedback time is further shortened, and the relatively close data is not conducive to analyzing the frosting condition of the evaporator. Therefore, taking the reciprocal of the feedback time can be numerically amplified, especially after frosting, the feedback value is larger and the numerical span is larger, which can more intuitively reflect the frosting condition of the evaporator.

[0056] Optionally, the first defrosting condition includes: the feedback value is within the resonance defrosting interval. In this way, by comparing whether the feedback value is within the established resonance defrosting interval, it can be more clearly determined whether resonance defrosting is required.

[0057] Combination Figure 3 As shown, the embodiment of the present disclosure provides another method for controlling evaporator defrosting, comprising:

[0058] S301, the processor controls the ultrasonic generator to enter a detection mode, and sends ultrasonic waves for detecting the thickness of the frost layer.

[0059] S302: The processor obtains the feedback duration of the ultrasonic wave used to detect the thickness of the frost layer.

[0060] S303: The processor takes the inverse of the ultrasonic feedback duration as a feedback value.

[0061] The feedback value is a dimensionless pure number. For example, if the feedback duration is 0.05ms, the corresponding feedback value is 20.

[0062] S304: The processor determines whether the feedback value is within the resonance defrosting range.

[0063] Optionally, t w Indicates the feedback value of the frost-free time, t j is the feedback value of the resonance defrost limit time. Among them, the frost-free feedback time refers to the time required for ultrasonic wave reflection when there is no frost on the evaporator surface. The resonance defrost limit time is the ultrasonic wave feedback time corresponding to the most serious frosting situation that the resonance defrost can handle. In practical applications, both are related to the distance between the location where the ultrasonic generator is set and the evaporator. For example, the frost-free time may be 0.8ms, and the resonance defrost limit time may be 0.05ms. Obviously, the frost-free time is longer than the resonance defrost limit time, and the feedback value of the frost-free time t w The feedback value t is less than the resonance defrosting limit time j .

[0064] Furthermore, the maximum value of the resonance defrost interval is the feedback value of the resonance defrost limit time t j The minimum value of the resonance defrost interval is the feedback value of the frost-free time t w And the feedback value of the resonance defrosting limit time t j For example, the minimum value of the resonance defrost interval can be taken as (t w +t j ) / 2 or t w +(t j -t w ) / 10. For example, the resonance defrosting interval can be [2,20].

[0065] S305: When the feedback value is within the resonance defrosting range, the processor controls the ultrasonic generator to enter the defrosting mode and sends ultrasonic waves for resonance defrosting.

[0066] In this way, the frosting condition of the evaporator can be analyzed more intuitively and accurately. Therefore, the resonance defrosting is only turned on when the feedback value is within the resonance defrosting range, which reduces energy consumption.

[0067] Optionally, the method further includes: determining the duration of the resonance defrosting according to the feedback value. The larger the feedback value, the longer the duration of the resonance defrosting. In this way, the duration of the resonance defrosting can be more reasonably controlled, further reducing energy consumption.

[0068] Combination Figure 4 As shown, the embodiment of the present disclosure provides another method for controlling evaporator defrosting, comprising:

[0069] S401, the processor controls the ultrasonic generator to enter a detection mode, and sends ultrasonic waves for detecting the thickness of the frost layer.

[0070] S402: The processor obtains the feedback duration of the ultrasonic wave used to detect the thickness of the frost layer.

[0071] S403: The processor takes the inverse of the ultrasonic feedback duration as a feedback value.

[0072] S404: The processor determines whether the feedback value is within the resonance defrosting range.

[0073] S405: When the feedback value is within the resonance defrosting range, the processor controls the ultrasonic generator to enter the defrosting mode and sends ultrasonic waves for resonance defrosting.

[0074] S406: The processor determines the duration of the resonance defrosting according to the feedback value.

[0075] The larger the feedback value is, the longer the duration of the resonance defrosting is. For example, the corresponding relationship between the feedback value and the defrosting duration is shown in Table 1.

[0076] Table 1

[0077]

[0078]

[0079] Optionally, when the resonance defrosting ends, or after a period of time, the process returns to step S401 and resends the ultrasonic wave to detect the thickness of the frost layer.

[0080] In this way, a more appropriate defrost duration can be formulated according to the specific frosting conditions, further reducing the power consumption of resonance defrosting.

[0081] Optionally, combined Figure 5 As shown, the system environment also includes a heating wire 50, which is arranged at the bottom of the evaporator 10 and connected to the processor. The method also includes: when the feedback value is greater than the maximum value of the resonance defrosting interval, starting the heating wire to perform heating defrosting. In this way, in the case of severe frosting where the resonance defrosting is difficult to play an effect, the heating defrosting can be enabled to deal with the frosting of the evaporator, so that the method can be applied to more situations.

[0082] Furthermore, the method further comprises: detecting the ultrasonic feedback duration during the heating and defrosting process. When it is detected during the heating and defrosting process that the ultrasonic feedback duration is in the resonance defrosting interval, controlling the ultrasonic generator to enter the defrosting mode and sending ultrasonic waves for resonance defrosting.

[0083] Optionally, the method further comprises: after the resonance defrosting is performed n times, or after the total duration of the resonance defrosting reaches m minutes, starting the heating wire to perform heating defrosting. Wherein, n is greater than or equal to 5, and m is greater than or equal to 15. In this way, the vibration frost that falls off can be uniformly processed after accumulation, and the overall impact on the temperature of the refrigeration equipment is relatively low.

[0084] Combination Figure 6 As shown, the embodiment of the present disclosure provides another method for controlling evaporator defrosting, comprising:

[0085] S501, the processor controls the ultrasonic generator to enter a detection mode, and sends ultrasonic waves for detecting the thickness of the frost layer.

[0086] S502: The processor obtains the feedback duration of the ultrasonic wave used to detect the thickness of the frost layer.

[0087] S503: The processor takes the inverse of the ultrasonic feedback duration as a feedback value.

[0088] S504: The processor determines whether the feedback value is within the resonance defrosting range.

[0089] S505: When the feedback value is within the resonance defrosting range, the processor controls the ultrasonic generator to enter the defrosting mode and sends ultrasonic waves for resonance defrosting.

[0090] S506: When the feedback value is greater than the maximum value of the resonance defrost interval, the processor starts the heating defrost wire to perform heating defrost.

[0091] S507: During the heating and defrosting process, the processor detects the ultrasonic feedback duration.

[0092] S508: When the processor detects that the ultrasonic feedback duration is within the resonance defrosting interval during the heating defrosting process, the processor controls the ultrasonic generator to enter the defrosting mode and sends ultrasonic waves for resonance defrosting.

[0093] Optionally, in this case, resonance defrosting and heating defrosting can work together to maximize the efficiency of evaporator defrosting.

[0094] Optionally, in this case, the heating wire can be turned off, heating and defrosting can be stopped, and only resonance defrosting can be used to deal with the remaining frost. In this way, the influence of unnecessary heating on the temperature of the refrigeration equipment can be reduced as much as possible.

[0095] S509, after the resonance defrosting is performed n times, or after the total duration of the resonance defrosting reaches m minutes, the heating wire is started to perform heating and defrosting.

[0096] Since the principle of resonance defrosting is to make the frost layer fall off, the fallen frost still remains at the bottom of the evaporator. Therefore, when the evaporator is operated multiple times or the cumulative operation time is long, heating is required to remove the frost at the bottom. Among them, the value range of n is 5 to 10, and the value range of m is 15 to 30. For example, n can be 5 or 6, and m can be 15 or 18.

[0097] In this way, when the feedback value is greater than the maximum value of the resonance defrosting range, it is considered that the frosting is relatively serious and the resonance defrosting is difficult to effectively deal with the current frosting situation. Therefore, in this case, starting the heating wire for heating defrosting can remove severe frosting faster and more effectively. It can handle more and more complex frosting situations.

[0098] Combination Figure 7 As shown, the embodiment of the present disclosure provides a device 60 for controlling the defrosting of an evaporator, including a processor 601 and a memory 602. Optionally, the device 60 may also include a communication interface 603 and a bus 604. The processor 601, the communication interface 603, and the memory 602 may communicate with each other through the bus 604. The communication interface 702 may be used for information transmission. The processor 601 may call the logic instructions in the memory 602 to execute the method for controlling the defrosting of the evaporator of the above embodiment.

[0099] In addition, the logic instructions in the memory 602 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0100] The memory 602 is a computer-readable storage medium that can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 604 executes the function application and data processing by running the program instructions / modules stored in the memory 602, that is, the method for controlling the defrosting of the evaporator in the above embodiment is implemented.

[0101] The memory 602 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 602 may include a high-speed random access memory and may also include a non-volatile memory.

[0102] Combination Figure 8 As shown, an embodiment of the present disclosure provides a refrigeration device 70, including: a refrigeration device body, and the above-mentioned device 60 for defrosting the evaporator.

[0103] The refrigeration equipment body includes an evaporator, and the evaporator is provided with an ultrasonic generator, a vibration plate and an ultrasonic transducer.

[0104] The vibration plates are arranged on both sides of the evaporator. The ultrasonic generator is arranged on the vibration plate, and sends an electrical signal of a specific frequency to the ultrasonic transducer when performing resonance defrosting. The ultrasonic transducer is arranged on the vibration plate and is electrically connected to the ultrasonic generator, and is used to receive the electrical signal sent by the ultrasonic generator, and convert the energy into mechanical energy, induce vibration, and drive the vibration plate to vibrate at a specific frequency.

[0105] The device 60 for controlling the defrosting of the evaporator is installed on the refrigeration equipment body. The installation relationship described here is not limited to the placement inside the product body, but also includes the installation connection with other components of the refrigeration equipment 70, including but not limited to physical connection, electrical connection or signal transmission connection. It can be understood by those skilled in the art that the device 60 for controlling the defrosting of the evaporator can be adapted to a feasible refrigeration equipment body, thereby realizing other feasible embodiments.

[0106] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling defrosting of an evaporator.

[0107] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0108] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0109] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0110] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0111] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling defrosting of an evaporator, applied to a refrigeration device comprising an evaporator, wherein the evaporator comprises an ultrasonic generator, characterized in that: The method comprises: Controlling the ultrasonic generator to enter a detection mode and sending ultrasonic waves for detecting the thickness of the frost layer; Use ultrasonic waves to detect the frosting condition on the evaporator surface; When the frosting condition meets the first defrosting condition, the ultrasonic generator is controlled to enter the defrosting mode and send ultrasonic waves for resonance defrosting.

2. The method according to claim 1, characterized in that Using ultrasonic waves to detect frosting on the evaporator surface includes: Obtaining the feedback duration of the ultrasonic wave used to detect the thickness of the frost layer; The reciprocal of the ultrasonic feedback time is taken as the feedback value; wherein, the larger the feedback value, the more serious the frosting on the evaporator surface.

3. The method according to claim 2, characterized in that The first defrost condition includes: The feedback value is within the resonance defrost range.

4. The method according to claim 2, characterized in that: Also includes: The duration of the resonance defrosting is determined according to the feedback value; wherein, the greater the feedback value, the longer the duration of the resonance defrosting.

5. The method according to claim 2, characterized in that: The evaporator further comprises a heating wire, and the method further comprises: When the feedback value is greater than the maximum value of the resonance defrosting interval, the heating wire is started to perform heating and defrosting.

6. The method according to claim 5, characterized in that Also includes: During the heating and defrosting process, detect the feedback duration of the ultrasonic wave; When it is detected during the heating defrosting process that the ultrasonic feedback duration is within the resonance defrosting interval, the ultrasonic generator is controlled to enter the defrosting mode and send ultrasonic waves for resonance defrosting.

7. The method according to any one of claims 1 to 4, characterized in that: The evaporator further comprises a heating wire, and the method further comprises: After the resonance defrosting is performed n times, the heating wire is started to heat and defrost; or, After the total duration of resonance defrosting reaches m minutes, the heating wire is started to perform heating defrosting; Wherein, n is greater than or equal to 5, and m is greater than or equal to 15.

8. A device for controlling defrosting of an evaporator, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling defrosting of an evaporator according to any one of claims 1 to 7 when running the program instructions.

9. A refrigeration device, characterized in that: include: The refrigeration equipment body includes an evaporator, and the evaporator is provided with an ultrasonic generator, a vibration plate and an ultrasonic transducer; The device for controlling evaporator defrosting as claimed in claim 9 is installed on the refrigeration equipment body.

10. The refrigeration device according to claim 9, characterized in that: The vibration plates are arranged on both sides of the evaporator; The ultrasonic generator is arranged on the vibration plate, and sends an electrical signal of a specific frequency to the ultrasonic transducer when performing resonance defrosting; The ultrasonic transducer is arranged on the vibration plate and is electrically connected to the ultrasonic generator. It is used to receive the electrical signal sent by the ultrasonic generator and convert the energy into mechanical energy, thereby inducing vibration and driving the vibration plate to vibrate at a specific frequency.

11. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is used to execute the method for controlling defrosting of an evaporator according to any one of claims 1 to 7.

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