CN111426137A - Defrosting control method and device and freezing/refrigerating equipment - Google Patents
Defrosting control method and device and freezing/refrigerating equipment Download PDFInfo
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- CN111426137A CN111426137A CN202010313200.8A CN202010313200A CN111426137A CN 111426137 A CN111426137 A CN 111426137A CN 202010313200 A CN202010313200 A CN 202010313200A CN 111426137 A CN111426137 A CN 111426137A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
Abstract
The invention discloses a defrosting control method and device and freezing/refrigerating equipment. Wherein, the method comprises the following steps: acquiring a projection image of the evaporator on a projection plane at preset time intervals, wherein the projection plane is the windward side of the evaporator; comparing the obtained projection image with a pre-stored reference image to obtain the similarity of the two images; wherein, the reference image is a projection image of the evaporator on the projection plane in a frost-free state; and controlling the operation mode of the freezing/refrigerating equipment according to the similarity. According to the invention, the defrosting can be carried out timely according to the actual frosting condition, and the performance of the freezing/refrigerating equipment is improved.
Description
Technical Field
The invention relates to the technical field of freezing/refrigerating equipment, in particular to a defrosting control method and device and the freezing/refrigerating equipment.
Background
How to perform efficient defrosting has been a major problem to be solved in the refrigeration and cold storage equipment, wherein a defrosting control strategy determines when the equipment enters defrosting and exits defrosting, and is particularly important in the refrigeration and cold running logic. The good defrosting control method can reduce the invalid defrosting time of the equipment and can more easily maintain the set temperature of the equipment.
However, most of the existing freezing and refrigerating equipment uses an interval defrosting method which takes time as a main temperature as an auxiliary temperature, namely, the interval duration of entering defrosting is fixed, and whether a defrosting exit condition is met or not is judged according to the set maximum defrosting time and the maximum temperature so as to control defrosting holding time.
However, the frosting speed of the equipment is completely different under different use environments, the equipment enters a defrosting mode purely according to the interval time, and if the equipment is easy to perform ineffective defrosting under the environment with low humidity, the temperature is increased sharply; if the equipment is easy to be defrosted incompletely under the environment with high humidity, frost blockage is easy to be caused, and a series of problems are caused.
Aiming at the problem that the defrosting time can not be flexibly controlled according to the actual situation in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a defrosting control method, a defrosting control device and freezing/refrigerating equipment, and aims to solve the problem that defrosting time cannot be flexibly controlled according to actual conditions in the prior art.
In order to solve the technical problem, the invention provides a defrosting control method, wherein the method comprises the following steps:
acquiring a projection image of the evaporator on a projection plane at preset time intervals, wherein the projection plane is the windward side of the evaporator;
comparing the obtained projection image with a pre-stored reference image to obtain the similarity of the two images; wherein, the reference image is a projection image of the evaporator on the projection plane in a frost-free state;
and controlling the operation mode of the freezing/refrigerating equipment according to the similarity.
Further, comparing the obtained projection image with a pre-stored reference image to obtain the similarity of the two images, including:
calculating a first area enclosed by the outermost contour of the reference image;
calculating a second area enclosed by the outermost contour of the obtained projection image;
calculating the similarity according to the first area and the second area.
Further, the similarity is calculated according to the first area and the second area, and the calculation is realized according to the following formula:
β＝100％－K*(S2-S1)/S1，
wherein β is the similarity, K is a frost layer influence factor, S1Is the first area, S2Is the second area.
Further, controlling an operation mode of the freezing/refrigerating apparatus according to the similarity includes:
comparing the similarity with a first preset threshold value;
if the similarity is smaller than or equal to the first preset threshold, controlling the freezing/refrigerating equipment to operate in a defrosting mode;
and if the similarity is greater than the first preset threshold value, controlling the freezing/refrigerating equipment to operate a temperature control mode, wherein the temperature control mode comprises a refrigeration mode or a heating mode.
Further, after controlling the freezing/refrigerating apparatus to operate the defrosting mode, the method further includes:
acquiring a projection image of the evaporator on the projection plane again at preset intervals;
comparing the re-acquired projection image with the reference image to acquire the similarity of the two images;
and controlling the operation mode of the freezing/refrigerating equipment according to the acquired similarity.
Further, controlling the operation mode of the freezing/refrigerating apparatus according to the acquired similarity includes:
comparing the similarity with a second preset threshold value;
if the similarity is smaller than the second preset threshold value, continuing to control the freezing/refrigerating equipment to operate the defrosting mode;
if the similarity is greater than or equal to the second preset threshold, controlling the freezing/refrigerating equipment to exit the defrosting mode and operate the temperature control mode;
wherein the second preset threshold is greater than the first preset threshold.
The invention also provides a defrosting control device, which is used for realizing the defrosting control method and comprises the following steps:
the image acquisition module is used for acquiring a projection image of the evaporator on a projection plane at intervals of preset time, wherein the projection plane is the windward side of the evaporator;
the image comparison module is used for comparing the obtained projection image with a reference image to obtain the similarity of the two images;
and the control module is used for controlling the operation mode of the freezing/refrigerating equipment according to the similarity.
Further, the image comparison module comprises:
the first calculating unit is used for calculating a first area enclosed by the outermost outline of the reference image;
the second calculating unit is used for calculating a second area surrounded by the outermost contour of the acquired projection image;
a third calculating unit, configured to calculate the similarity according to the first area and the second area.
Further, the control module includes:
the comparison unit is used for comparing the size relation between the similarity and a first preset threshold value;
the first control unit is used for controlling the freezing/refrigerating equipment to operate a defrosting mode when the similarity is less than or equal to the first preset threshold;
and the second control unit is used for controlling the freezing/refrigerating equipment to operate in a temperature control mode when the similarity is greater than the first preset threshold, wherein the temperature control mode comprises a refrigeration mode or a heating mode.
The invention also provides a freezing/refrigerating device which comprises the defrosting control device.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described defrost control method.
By applying the technical scheme of the invention, the projected image of the evaporator on the windward side is acquired at preset time intervals, the acquired projected image is compared with the reference image, the operation mode of the freezing/refrigerating equipment is controlled according to the similarity of the images, whether the frost is formed or not is judged according to the contour change of the evaporator before and after the frost is formed, and then the operation is controlled or the defrosting mode is quitted, so that the defrosting can be timely carried out according to the actual frost forming condition, and the performance of the freezing/refrigerating equipment is improved.
Drawings
FIG. 1 is a flow chart of a defrost control method according to an embodiment of the present invention;
FIG. 2 is a diagram of the evaporator and the camera according to the embodiment of the present invention;
FIG. 3 is a flow chart of a defrost control method according to another embodiment of the present invention;
FIG. 4 is a graph of a range of defrost conditions according to an embodiment of the present invention;
FIG. 5 is a block diagram of a defrost control apparatus according to an embodiment of the present invention;
fig. 6 is a structural view of a defrosting control apparatus according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe computing units in embodiments of the present invention, these computing units should not be limited by these terms. These terms are only used to distinguish one computing unit from another implementing different functionality. For example, a first computing unit may also be referred to as a second computing unit, and similarly, a second computing unit may also be referred to as a first computing unit, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The present embodiment provides a defrosting control method, and fig. 1 is a flowchart of the defrosting control method according to the embodiment of the present invention, as shown in fig. 1, the defrosting control method includes:
s101, acquiring a projection image of the evaporator on a projection plane at preset time intervals, wherein the projection plane is the windward side of the evaporator.
In this embodiment, a high-definition waterproof camera is used to collect a projection image of an evaporator on a projection plane, that is, the high-definition waterproof camera is used to shoot the projection image of the evaporator on a windward side of the evaporator, fig. 2 is a positional relationship diagram of the evaporator and the camera according to the embodiment of the present invention, as shown in fig. 2, the camera 1 is disposed above the windward side of the evaporator 2, an image collecting direction of the camera is parallel to a fin extending direction of the evaporator 2, that is, an air blowing direction of a fan 3, and in fig. 2, a surface of the evaporator 2 parallel to a paper surface is a frosted surface.
S102, comparing the obtained projection image with a pre-stored reference image to obtain the similarity of the projection image and the pre-stored reference image; wherein, the reference image is a projection image of the evaporator on the projection plane in a frost-free state.
In a frost-free state, a projection image of the evaporator on the windward side is collected and stored in a system to serve as a reference image, the image of the side, which is obtained at preset time intervals, is compared with the reference image, if the surface of the evaporator is frosted, the thickness of the frosted surface is increased after frosting, the outline of the image collected by the camera from the side is changed, and the thicker the frosting is, the more obvious the change of the external outline of the image is.
And S103, controlling the operation mode of the freezing/refrigerating equipment according to the similarity.
The operation mode comprises a defrosting mode or a conventional refrigerating/heating mode, whether the surface of the evaporator is frosted or not and the frosting degree are reflected through the similarity between the image acquired in real time and the reference image, and then the operation of the refrigerating/refrigerating equipment according to the conventional refrigerating/heating mode or the defrosting is determined and controlled.
According to the defrosting control method, the projected image of the evaporator on the windward side is acquired at preset time intervals, the acquired projected image is compared with the reference image, the operation mode of the freezing/refrigerating equipment is controlled according to the similarity of the images, whether the evaporator frosts or not is judged according to the change of the outline of the evaporator before and after frosting, the operation is controlled or the defrosting mode is quitted, defrosting can be timely performed according to the actual frosting condition, and the performance of the freezing/refrigerating equipment is improved.
Example 2
In this embodiment, in order to obtain a similarity between an image acquired in real time and a reference image, in a specific implementation process, in the defrosting control method according to the foregoing embodiment, step S102 specifically includes: calculating a first area enclosed by the outermost contour of the reference image; calculating a second area enclosed by the outermost contour of the obtained projection image; calculating the similarity according to the first area and the second area. Specifically, the above-described similarity is calculated according to the following formula:
β＝100％－K*(S2-S1)/S1，
wherein β is the similarity, K is a frost layer influence factor, S1Is the first area, S2Is the second area.
It should be noted that the value of K is equal to the evaporator fin thickness/fin pitch; i.e., the larger the sheet distance, the smaller the effect of the same thickness of frost layer on the evaporator, and the higher its similarity to the evaporator in the frost free state.
After obtaining the similarity between the image collected in real time and the reference image, in order to further implement the operation mode control of the freezing/refrigerating apparatus, S103 specifically includes: comparing the similarity with a first preset threshold value; if the similarity is smaller than or equal to the first preset threshold, the frosting on the surface of the evaporator is serious, and the operation defrosting mode of the freezing/refrigerating equipment needs to be controlled; if the similarity is greater than the first preset threshold, it indicates that the surface of the evaporator is not frosted or is frosted slightly, and the freezing/refrigerating equipment can be controlled to operate in a temperature control mode, wherein the temperature control mode comprises a cooling mode or a heating mode.
After entering the defrosting mode, the frost formation amount on the surface of the evaporator is reduced along with the accumulation of the defrosting time until the frost layer is completely removed, and the normal refrigerating or heating mode can be recovered, in order to accurately control the time for recovering the normal refrigerating or heating mode, after the operation of the refrigerating/cold storage equipment in the defrosting mode is controlled, the method further comprises the following steps: acquiring the projection image of the evaporator on the projection plane again at preset intervals; comparing the re-acquired projection image with the reference image to acquire the similarity of the two, wherein the method for acquiring the similarity is the same as that in the step S102, and is not repeated here; and controlling the operation mode of the freezing/refrigerating equipment according to the acquired similarity. Specifically, comparing the magnitude relation between the similarity and a second preset threshold; if the similarity is smaller than the second preset threshold, the frost layer is still thick, and the operation defrosting mode of the freezing/refrigerating equipment needs to be controlled continuously; if the similarity is larger than or equal to the second preset threshold, the frost layer is completely removed or only a small amount of frost remains, the freezing/refrigerating equipment is controlled to exit the defrosting mode, the temperature control mode is operated, and the conventional refrigerating or heating mode is recovered; wherein the second preset threshold is greater than the first preset threshold.
Example 3
This embodiment provides another defrosting control method, fig. 3 is a flowchart of a defrosting control method according to another embodiment of the present invention, as shown in fig. 3, the method includes:
s1, sampling and contour scanning the evaporator in the frostless state, calculating the contour surface area S1, and storing the data on the main board.
The picture is sampled through the high-definition waterproof camera, specifically, the miniature high-definition waterproof camera is installed in the airflow direction of the finned evaporator used by the freezing and refrigerating equipment, the camera and the mainboard can be used for data transmission, and the camera is controlled to be started when the freezing and refrigerating equipment operates.
And S2, setting a minimum matching similarity value X and a maximum matching similarity value Y, wherein X is less than Y.
S3, in the normal cooling or heating mode, the evaporator is imaged once every preset time (for example, 10S), the image is transmitted to the main board, the main board extracts the image contour and calculates the contour surface area at this time S2, and the matching similarity β is calculated through S2 and S1.
Specifically, the matching similarity β is calculated according to the following formula, β -100% -Ky*(S2-S1)/S1
Wherein, KyThe frost layer influence factor is equal to the thickness of the evaporator fins/fin distance; i.e., the larger the fin pitch, the smaller the effect of the same thickness of frost layer on the evaporator, and the higher its similarity to the evaporator in the frost-free state.
S4, judging the size relationship between the matching similarity β and the minimum matching similarity X, if the matching similarity β is not more than X, entering the step S5, otherwise, returning to the step S3.
And S5, controlling the equipment to operate a defrosting mode.
And S6, the camera takes images of the evaporator once every preset time (for example, 10S), the images are transmitted to the main board, the main board extracts the image contour to calculate the contour surface area at the moment S3, and the matching similarity β is calculated through S3 and S1.
And S7, judging the size relationship between the matching similarity β and the maximum value Y of the matching similarity, if the matching similarity β of the actual round is not more than Y, entering the step S8, and if not, returning to the step S6.
And S8, the control equipment exits the defrosting mode and operates the cooling or heating mode.
As shown in FIG. 4, when the matching similarity β is less than or equal to X, the defrosting mode is entered, when X is less than β and less than Y, the defrosting mode is operated, when β is less than or equal to Y, the defrosting mode is exited, the refrigerating mode is recovered, after the refrigerating mode is recovered, when X is less than β and less than Y, the refrigerating mode is continuously operated until β is less than or equal to X, the defrosting mode is re-entered, and the process is repeated.
According to the defrosting control method, the defrosting is judged according to the profile comparison information of the real-time image of the evaporator, so that the control mode does not have the problem that the evaporator enters the defrosting mode due to the fact that the time interval meets the condition when the evaporator is not frosted seriously, or the problem that the evaporator cannot enter the defrosting mode due to the fact that the time interval does not meet the condition when the evaporator is frosted seriously.
Example 4
This embodiment provides a defrosting control apparatus, fig. 5 is a structural diagram of the defrosting control apparatus according to the embodiment of the present invention, and as shown in fig. 5, the defrosting control apparatus includes:
the image acquisition module 10 is used for acquiring a projection image of the evaporator on a projection plane at preset intervals, wherein the projection plane is a windward side of the evaporator, the image acquisition module is a high-definition waterproof camera, the projection image of the evaporator on the projection plane is acquired through the high-definition waterproof camera, and the projection image of the evaporator on the windward side is shot through the high-definition waterproof camera.
The image comparison module 20 is configured to compare the obtained projection image with a reference image to obtain similarity between the two images; in a frost-free state, an image of the windward side of the evaporator is acquired and stored in the system as a reference image, the image of the side acquired at a preset time interval is compared with the reference image through the image comparison module 20, if the surface of the evaporator frosts, the thickness of the frosting surface is increased after frosting, the outline of the image acquired by the camera from the side can be changed, and the thicker the frosting is, the more obvious the change of the external outline of the image is.
And a control module 30 for controlling the operation mode of the freezing/refrigerating apparatus according to the similarity.
The defrosting control device of the embodiment acquires the projected image of the evaporator on the windward side of the evaporator at preset time intervals through the image acquisition module, compares the acquired projected image with the reference image through the image comparison module, controls the operation mode of the freezing/refrigerating equipment according to the similarity of the images, judges whether frosting occurs by utilizing the change of the outline of the evaporator before and after frosting, and further controls the operation or exits from the defrosting mode, can timely defrost according to the actual frosting condition, and improves the performance of the freezing/refrigerating equipment.
Example 5
In this embodiment, another defrosting control device is provided, fig. 6 is a structural diagram of the defrosting control device according to another embodiment of the present invention, in order to obtain the similarity between the image collected in real time and the reference image, as shown in fig. 6, the image comparing module 20 includes: a first calculating unit 201, configured to calculate a first area enclosed by an outermost contour of the reference image; a second calculating unit 202, configured to calculate a second area surrounded by an outermost contour of the acquired projection image; a third calculating unit 203, configured to calculate the similarity according to the first area and the second area.
After obtaining the similarity between the real-time captured image and the reference image, in order to further implement the operation mode control of the freezing/refrigerating apparatus, as shown in fig. 6, the control module 30 includes: a first comparing unit 301, configured to compare a magnitude relationship between the similarity and a first preset threshold; a first control unit 302 for controlling the freezing/refrigerating apparatus to operate the defrosting mode when the similarity is less than or equal to the first preset threshold; and a second control unit 303, configured to control a temperature control mode of the freezing/refrigerating apparatus when the similarity is greater than the first preset threshold, where the temperature control mode includes a cooling mode or a heating mode.
After entering the defrosting mode, the frost formation amount on the surface of the evaporator is reduced along with the accumulation of defrosting time until the frost layer is completely removed, and the normal refrigerating or heating mode can be recovered, in order to accurately control the time for recovering the normal refrigerating or heating mode, the image acquisition module 10 is further configured to, after entering the defrosting mode, reacquire the projection image of the evaporator on the projection plane at preset intervals; the image comparison module 20 is further configured to compare the re-acquired projection image with the reference image to acquire a similarity therebetween; the control module 30 controls the operation mode of the freezing/refrigerating apparatus according to the acquired similarity.
To achieve the above object, the control module 30 further includes:
a second comparing unit 304, for comparing the magnitude relation between the similarity and a second preset threshold;
a third control unit 305 for continuing to control the operation of the freezing/refrigerating apparatus in the defrosting mode when the similarity is less than a second preset threshold;
the fourth control unit 306 is configured to control the freezing/refrigerating apparatus to exit the defrosting mode and operate the temperature control mode when the similarity is greater than or equal to the second preset threshold; wherein the second preset threshold is greater than the first preset threshold.
Example 6
The embodiment provides a freezing/refrigerating device, which comprises the defrosting control device in the embodiment, and is used for defrosting the evaporator in real time.
Example 7
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described defrost control method.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A defrost control method, the method comprising:
acquiring a projection image of the evaporator on a projection plane at preset time intervals, wherein the projection plane is the windward side of the evaporator;
comparing the obtained projection image with a pre-stored reference image to obtain the similarity of the two images; wherein, the reference image is a projection image of the evaporator on the projection plane in a frost-free state;
and controlling the operation mode of the freezing/refrigerating equipment according to the similarity.
2. The method of claim 1, wherein comparing the acquired projection image with a pre-stored reference image to obtain a similarity therebetween comprises:
calculating a first area enclosed by the outermost contour of the reference image;
calculating a second area enclosed by the outermost contour of the obtained projection image;
calculating the similarity according to the first area and the second area.
3. The method of claim 2, wherein the similarity is calculated from the first area and the second area according to the following formula:
β＝100％－K*(S2-S1)/S1，
wherein β is the similarity, K is a frost layer influence factor, S1Is the first area, S2Is the second area.
4. The method of claim 1, wherein controlling the operation mode of the freezing/refrigerating apparatus according to the similarity comprises:
comparing the similarity with a first preset threshold value;
if the similarity is smaller than or equal to the first preset threshold, controlling the freezing/refrigerating equipment to operate in a defrosting mode;
and if the similarity is greater than the first preset threshold value, controlling the freezing/refrigerating equipment to operate a temperature control mode, wherein the temperature control mode comprises a refrigeration mode or a heating mode.
5. The method of claim 4, wherein after controlling the freezer/refrigerator to operate in the defrost mode, the method further comprises:
acquiring a projection image of the evaporator on the projection plane again at preset intervals;
comparing the re-acquired projection image with the reference image to acquire the similarity of the two images;
and controlling the operation mode of the freezing/refrigerating equipment according to the acquired similarity.
6. The method of claim 5, wherein controlling the operation mode of the freezing/refrigerating apparatus according to the acquired similarity comprises:
comparing the similarity with a second preset threshold value;
if the similarity is smaller than the second preset threshold value, continuing to control the freezing/refrigerating equipment to operate the defrosting mode;
if the similarity is greater than or equal to the second preset threshold, controlling the freezing/refrigerating equipment to exit the defrosting mode and operate the temperature control mode;
wherein the second preset threshold is greater than the first preset threshold.
7. A defrosting control apparatus for realizing the defrosting control method according to any one of claims 1 to 6, characterized by comprising:
the image acquisition module is used for acquiring a projection image of the evaporator on a projection plane at intervals of preset time, wherein the projection plane is the windward side of the evaporator;
the image comparison module is used for comparing the obtained projection image with a reference image to obtain the similarity of the two images;
and the control module is used for controlling the operation mode of the freezing/refrigerating equipment according to the similarity.
8. The apparatus of claim 7, wherein the image matching module comprises:
the first calculating unit is used for calculating a first area enclosed by the outermost outline of the reference image;
the second calculating unit is used for calculating a second area surrounded by the outermost contour of the acquired projection image;
a third calculating unit, configured to calculate the similarity according to the first area and the second area.
9. The apparatus of claim 7, wherein the control module comprises:
the comparison unit is used for comparing the size relation between the similarity and a first preset threshold value;
the first control unit is used for controlling the freezing/refrigerating equipment to operate a defrosting mode when the similarity is less than or equal to the first preset threshold;
and the second control unit is used for controlling the freezing/refrigerating equipment to operate in a temperature control mode when the similarity is greater than the first preset threshold, wherein the temperature control mode comprises a refrigeration mode or a heating mode.
10. A freezing/refrigerating appliance comprising the defrosting control means as claimed in any one of claims 7 to 9.
11. A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing a defrost control method according to any of claims 1-6.
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| CN202010313200.8A CN111426137A (en) | 2020-04-20 | 2020-04-20 | Defrosting control method and device and freezing/refrigerating equipment |
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| CN202010313200.8A CN111426137A (en) | 2020-04-20 | 2020-04-20 | Defrosting control method and device and freezing/refrigerating equipment |
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| CN (1) | CN111426137A (en) |
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| CN106288158A (en) * | 2016-08-05 | 2017-01-04 | 珠海格力电器股份有限公司 | Air-conditioning and defrosting method thereof and device |
| CN106568251A (en) * | 2016-10-11 | 2017-04-19 | 珠海格力电器股份有限公司 | Refrigerating equipment defrosting control method and device and refrigerating equipment with device |
| CN108613460A (en) * | 2018-06-26 | 2018-10-02 | 北京工业大学 | A kind of air source heat pump control frost method for surveying white technology based on image recognition |
| CN110657617A (en) * | 2018-06-29 | 2020-01-07 | 博西华电器（江苏）有限公司 | Defrosting control method and device for refrigerator and refrigerator |
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| WO2011122887A2 (en) * | 2010-04-02 | 2011-10-06 | Lg Innotek Co., Ltd. | Defrosting system and method of refrigerator |
| CN106288158A (en) * | 2016-08-05 | 2017-01-04 | 珠海格力电器股份有限公司 | Air-conditioning and defrosting method thereof and device |
| CN106568251A (en) * | 2016-10-11 | 2017-04-19 | 珠海格力电器股份有限公司 | Refrigerating equipment defrosting control method and device and refrigerating equipment with device |
| CN108613460A (en) * | 2018-06-26 | 2018-10-02 | 北京工业大学 | A kind of air source heat pump control frost method for surveying white technology based on image recognition |
| CN110657617A (en) * | 2018-06-29 | 2020-01-07 | 博西华电器（江苏）有限公司 | Defrosting control method and device for refrigerator and refrigerator |
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Application publication date: 20200717 |