Method and device for determining heat exchanger fault information

Abstract

The present invention discloses a method and device for determining heat exchanger fault information. The method comprises: obtaining a first water flow image and a second water flow image of a heat exchanger interface, wherein the first water flow image and the second water flow image are images collected at different times; when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first predetermined threshold, obtaining a temperature distribution diagram during the operation of the heat exchanger, wherein the first preset threshold is a preset blurriness threshold of the water flow image; and determining the heat exchanger fault information based on the temperature distribution diagram. The present invention solves the technical problem in the related art that the channels between the plates of the plate heat exchanger are easily blocked, the efficiency of manual detection of blockage is low, and there are safety hazards.

Description

Technical Field

[0001] The present invention relates to the field of household appliance fault detection, and in particular to a method and device for determining heat exchanger fault information. Background Art

[0002] The plate heat exchanger is a high-efficiency heat exchanger composed of a series of corrugated heat transfer metal sheets, which are stacked at a certain interval. Thin rectangular channels are formed between the plates of the heat exchanger, and heat is exchanged between the plates. The plate heat exchanger has the characteristics of small size, high heat transfer efficiency, flexible assembly, low metal consumption, less heat loss, etc. It also has the advantages of light weight, low price, easy production and long service life. However, since the channel between the plates of the plate heat exchanger is very narrow, generally only 2-5mm, when the heat exchange medium contains large particles or fibrous materials, it is easy to block the channel between the plates. At present, there are still some problems in the detection process of the plate heat exchanger, such as: the treatment after the blockage cannot accurately locate the cleaning position. If there is stubborn impurity blockage, the pipeline cannot be opened by cleaning with a water pump, or when the plate heat exchanger has more than one water inlet, cleaning all of them wastes water resources and time. Problems with the efficiency of manual detection. Manual recording and judgment are time-consuming and labor-intensive. Safety issues. There are inevitably some safety hazards such as scalding and burns during the manual detection process. Accuracy issues. The internal device of the plate heat exchanger makes it impossible for personnel to directly observe the location of these blockages.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiment of the present invention provides a method and device for determining heat exchanger fault information, so as to at least solve the technical problems in the related art that the channels between plates of the plate heat exchanger are easily blocked, the efficiency of manual blockage detection is low, and there are safety hazards.

[0005] According to one aspect of an embodiment of the present invention, a method for determining heat exchanger fault information is provided, comprising: obtaining a first water flow image and a second water flow image of a heat exchanger interface, wherein the first water flow image and the second water flow image are images collected at different times; when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first predetermined threshold, obtaining a temperature distribution diagram during the operation of the heat exchanger, wherein the first preset threshold is a preset blurriness threshold of the water flow image; and determining the fault information of the heat exchanger based on the temperature distribution diagram.

[0006] Optionally, before determining that the blur degree difference between the first water flow image and the second water flow image is greater than a first predetermined threshold, the method further includes: respectively obtaining a first blur degree and a second blur degree of the first water flow image and the second water flow image using a preset algorithm; calculating the difference between the first blur degree and the second blur degree and taking the absolute value to obtain the blur degree difference.

[0007] Optionally, the preset algorithm includes one of the following: Laplace algorithm, floating-point algorithm.

[0008] Optionally, determining the fault information of the heat exchanger based on the temperature distribution map includes: extracting RGB difference values ​​in the temperature distribution map, wherein the RGB difference values ​​are the difference between an abnormal RGB value area and other areas in the temperature distribution map; extracting contour information in the temperature distribution map, wherein the contour information is a difference ratio between an upper and lower width range of an operating temperature flow channel; and determining the fault information based on the RGB difference values ​​and the contour information.

[0009] Optionally, the fault information is determined based on the RGB difference and the contour information, including: determining whether there is a first target area in the temperature distribution map, the first target area being an area in the temperature distribution map where the RGB difference is greater than a second preset threshold, wherein the second preset threshold is an RGB preset difference threshold; determining whether there is a second target area in the temperature distribution map, the second target area being an area in the temperature distribution map where the contour information is greater than a third preset threshold, wherein the third preset threshold is a preset contour information threshold; in the case of determining that the first target area and the second target area exist, determining whether the water inlet is blocked; in the case of determining that the water inlet is blocked, determining the fault information including the fault location based on the position information of the first target area and the position information of the second target area.

[0010] Optionally, when it is determined that the first target area and the second target area exist, determining whether the water inlet is blocked includes: receiving the fault information; after determining that the time after receiving the fault information exceeds a fourth preset threshold, determining that a blockage occurs; wherein the fourth preset threshold is a time preset threshold after receiving the fault information.

[0011] Optionally, after determining the fault information of the heat exchanger based on the temperature distribution map, the method further includes: controlling a water pump to clean the faulty position of the heat exchanger.

[0012] According to another aspect of an embodiment of the present invention, a device for determining heat exchanger fault information is also provided, including: a first acquisition module, used to acquire a first water flow image and a second water flow image of a heat exchanger interface, wherein the first water flow image and the second water flow image are images collected at different times; a second acquisition module, used to acquire a temperature distribution map during the operation of the heat exchanger when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first predetermined threshold, wherein the first preset threshold is a preset blurriness threshold of the water flow image; a determination module, used to determine the fault information of the heat exchanger based on the temperature distribution map.

[0013] Optionally, the device also includes: a third acquisition module, used to obtain the first blur degree and the second blur degree of the first water flow image and the second water flow image respectively using a preset algorithm before determining that the blur degree difference between the first water flow image and the second water flow image is greater than a first predetermined threshold; a calculation module, used to calculate the difference between the first blur degree and the second blur degree and take the absolute value to obtain the blur degree difference.

[0014] Optionally, the preset algorithm includes one of the following: Laplace algorithm, floating-point algorithm.

[0015] Optionally, the determination module includes: a first extraction unit, used to extract RGB difference values ​​in the temperature distribution map, wherein the RGB difference values ​​are the difference values ​​between an abnormal RGB value area and other areas in the temperature distribution map; a second extraction unit, used to extract contour information in the temperature distribution map, wherein the contour information is a difference ratio between an upper and lower width range of a working temperature flow channel; and a determination unit, used to determine the fault information based on the RGB difference values ​​and the contour information.

[0016] Optionally, the determination unit includes: a first determination subunit, used to determine whether there is a first target area in the temperature distribution map, the first target area is an area in the temperature distribution map where the RGB difference is greater than a second preset threshold, wherein the second preset threshold is an RGB preset difference threshold; a second determination subunit, used to determine whether there is a second target area in the temperature distribution map, the second target area is an area in the temperature distribution map where the contour information is greater than a third preset threshold, wherein the third preset threshold is a preset contour information threshold; a third determination subunit, used to determine whether the water inlet is blocked when it is determined that the first target area and the second target area exist; a fourth determination subunit, used to determine the fault information including the fault location based on the position information of the first target area and the position information of the second target area when it is determined that the water inlet is blocked.

[0017] Optionally, the third determination subunit includes: a receiving subunit, used to receive the fault information; a judgment subunit, used to determine that a congestion condition occurs after determining that the time after receiving the fault information exceeds a fourth preset threshold; wherein the fourth preset threshold is a time preset threshold after receiving the fault information.

[0018] Optionally, the device further includes: a control module, configured to control a water pump to clean the faulty position of the heat exchanger after determining the fault information of the heat exchanger based on the temperature distribution map.

[0019] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed by a processor, the device where the computer-readable storage medium is located is controlled to execute any of the above-mentioned methods for determining heat exchanger fault information.

[0020] According to another aspect of an embodiment of the present invention, a processor is further provided, the processor being used to run a computer program, wherein the computer program executes any one of the above-mentioned methods for determining heat exchanger fault information when running.

[0021] In an embodiment of the present invention, a first water flow image and a second water flow image of a heat exchanger interface are obtained, wherein the first water flow image and the second water flow image are images collected at different times; when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first predetermined threshold, a temperature distribution diagram during the operation of the heat exchanger is obtained, wherein the first preset threshold is a preset blurriness threshold of the water flow image; and the fault information of the heat exchanger is determined based on the temperature distribution diagram. The method for determining the fault information of the heat exchanger according to the embodiment of the present invention achieves the purpose of determining the fault information of the heat exchanger based on the water flow image and the temperature distribution diagram of the heat exchanger interface obtained, thereby achieving the technical effect of improving the efficiency of plate heat exchanger fault detection, and further solving the technical problem in the related art that the channels between the plates of the plate heat exchanger are easily blocked, the efficiency of manual detection of blockage is low, and there are safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 is a flow chart of a method for determining heat exchanger fault information according to an embodiment of the present invention;

[0024] Figure 2is a schematic diagram of a plate heat exchanger structure according to an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of thermal imaging temperature distribution according to an embodiment of the present invention;

[0026] Figure 4 is a flow chart of a method for determining heat exchanger fault information according to an embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of a device for determining heat exchanger fault information according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] Example 1

[0031] According to an embodiment of the present invention, a method embodiment of a method for determining heat exchanger fault information is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0032] Figure 1 is a flow chart of a method for determining heat exchanger fault information according to an embodiment of the present invention. Figure 1 As shown, the method for determining the heat exchanger fault information includes the following steps:

[0033] Step S102, obtaining a first water flow picture and a second water flow picture of a heat exchanger interface, wherein the first water flow picture and the second water flow picture are pictures collected at different times.

[0034] Optionally, in the above steps, the heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, and in the embodiment of the present invention, a plate heat exchanger is mainly used.

[0035] It should be noted that, in the above steps, a first water flow rate picture is first obtained and then a second water flow rate picture is obtained at the same position after a preset period of time, so as to achieve the purpose of detecting the water flow rate.

[0036] Step S104, when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first preset threshold, obtain a temperature distribution diagram during the operation of the heat exchanger, wherein the first preset threshold is a preset blurriness threshold of the water flow image.

[0037] In the above steps, the blur degree of the water flow image is used to determine whether congestion occurs. When the channel between the plates of the plate heat exchanger is blocked, the water flow at the blocked part will change, and the blur degree of the water flow image will also change accordingly, so as to determine whether congestion occurs.

[0038] Step S106: determining fault information of the heat exchanger based on the temperature distribution diagram.

[0039] As can be seen from the above, in the embodiment of the present invention, the first water flow image and the second water flow image of the heat exchanger interface can be obtained first, wherein the first water flow image and the second water flow image are images collected at different times; then, when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than the first predetermined threshold, the temperature distribution diagram during the operation of the heat exchanger can be obtained, wherein the first preset threshold is the preset blurriness threshold of the water flow image; finally, the fault information of the heat exchanger is determined based on the temperature distribution diagram. The method for determining the fault information of the heat exchanger according to the embodiment of the present invention achieves the purpose of determining the fault information of the heat exchanger based on the water flow image and the temperature distribution diagram of the heat exchanger interface obtained, thereby achieving the technical effect of improving the efficiency of plate heat exchanger fault detection, and further solving the technical problem that the channels between the plates of the plate heat exchanger are easily blocked and the efficiency of manual detection of blockage is low, and there are safety hazards.

[0040] As an optional embodiment, before determining that the difference in blurriness between the first water flow image and the second water flow image is greater than a first predetermined threshold, the method also includes: using a preset algorithm to obtain a first blurriness and a second blurriness of the first water flow image and the second water flow image, respectively; calculating the difference between the first blurriness and the second blurriness and taking the absolute value to obtain the blurriness difference.

[0041] Figure 2 Schematic diagram of a plate heat exchanger structure according to an embodiment of the present invention. Figure 2 As shown, the water flow in the plate heat exchanger will flow at a uniform speed between the plates. When congestion occurs, the local water flow velocity will change. By detecting the change in the water flow rate, the Laplace variance algorithm is used to calculate the blurring degree of the front and back images according to the different blurring degrees within a certain period of time. When the calculated blurring degree difference is greater than the set threshold, it is used as the preliminary condition for blockage judgment.

[0042] As an optional embodiment, the preset algorithm includes one of the following: Laplace algorithm, floating-point operation algorithm.

[0043] In the above optional embodiment, the preset algorithm is mainly used to calculate the blur degree in the water flow image, which includes but is not limited to: Laplace variance algorithm, floating point numerical method, pixel gray value statistical method, etc. Among them, the Laplace variance algorithm is to perform convolution operation on a channel in the image with Laplace mask and then calculate the variance (i.e., standard deviation). If the variance of the image is lower than a predefined threshold, the image can be considered to be blurred; otherwise, it is not considered to be blurred, so as to simply and effectively judge the change of water flow.

[0044] As an optional embodiment, determining the fault information of the heat exchanger based on the temperature distribution map includes: extracting RGB difference values ​​in the temperature distribution map, wherein the RGB difference value is the difference between an abnormal RGB value area and other areas in the temperature distribution map; extracting contour information in the temperature distribution map, wherein the contour information is a difference ratio between an upper and lower width range of a working temperature flow channel; determining the fault information based on the RGB difference value and the contour information to achieve fault detection of the plate heat exchanger.

[0045] In the above optional embodiment, the RGB value in this embodiment is a value that can represent different colors. In the embodiment, the RGB value in the image is calculated, and the blockage condition of the target area is confirmed based on the difference between the RGB value of the blocked area and the RGB value of the normal area. The local temperature image after blockage will also show a certain area of ​​color diffusion. The next step is to extract the contour of the image in this range. The average width of the contour of the blocked area will undergo a singular change in value relative to the contour of its surrounding area, so as to judge the congestion condition and specific location.

[0046] As an optional embodiment, the fault information is determined according to the RGB difference and the contour information, including: determining whether there is a first target area in the temperature distribution map, the first target area is an area in the temperature distribution map where the RGB difference is greater than a second preset threshold, wherein the second preset threshold is an RGB preset difference threshold; determining whether there is a second target area in the temperature distribution map, the second target area is an area in the temperature distribution map where the contour information is greater than a third preset threshold, wherein the third preset threshold is a preset contour information threshold; in the case of determining that the first target area and the second target area exist, determining whether a water inlet is blocked; in the case of determining that the water inlet is blocked, determining the fault information including the fault location based on the position information of the first target area and the position information of the second target area.

[0047] Figure 3 is a schematic diagram of thermal imaging temperature distribution according to an embodiment of the present invention, such as Figure 3 As shown in the figure, under normal operation of the plate heat exchanger, the water flows at a uniform speed and the normal heat exchange process is carried out. The temperature distribution diagram shows a certain distribution law. Once congestion occurs at a certain position, the RGB value of the local position will produce a certain regional mutation relative to other positions without congestion, that is, the temperature distribution at the flow channel will have a certain area of ​​color deepening and diffusion. When this mutation value is greater than the preset RGB preset value, it can be judged that the area may be congested, and further conclusions can be drawn based on whether the temperature distribution of the heat exchanger flow channel is abnormal. .

[0048] As an optional embodiment, when it is determined that the first target area and the second target area exist, determining whether the water inlet is blocked includes: receiving the fault information; after determining that the time after receiving the fault information exceeds a fourth preset threshold, determining that a blockage occurs; wherein the fourth preset threshold is a time preset threshold after receiving the fault information.

[0049] In the above optional embodiment, when it is first determined that the first target area exists and the second target area also exists at the same time, it can be determined that the water inlet is blocked, and timing starts after receiving the fault information. When the time exceeds the preset time, it is determined that congestion has occurred, so as to achieve reasonable detection of congestion.

[0050] Furthermore, in the embodiment of the present invention, a thermal camera can be used to photograph the plate heat exchanger to obtain a temperature distribution map of the object surface during the operation of the plate heat exchanger. Because heat will accumulate in the blocked area, the temperature will rise in a small area. The thermal imaging picture of the plate heat exchanger (i.e., the temperature distribution map) will show red at high temperatures, and the higher the temperature, the deeper the red will be. At this time, we can use the statistical feature method of color parameters to extract the RGB values ​​in the image, and use the RGB values ​​to represent the difference between the image colors and the temperature. Therefore, if the temperature difference between the blocked area and the surrounding area becomes larger, the color difference on the distribution map will become more obvious, and a certain area of ​​color diffusion will appear. In this embodiment, the position here can also be marked, and the height of the plate and the spacing between the plates are used as the coordinate reference system.

[0051] As an optional embodiment, after determining the fault information of the heat exchanger based on the temperature distribution map, the method further includes: controlling a water pump to clean the faulty position of the heat exchanger.

[0052] Figure 4 FIG. 4 is a flow chart of a method for determining heat exchanger fault information according to an embodiment of the present invention. Figure 4 As shown, firstly, take a picture of the water flow within a certain period of time, then determine whether the difference in blurriness of the water flow pictures taken at different moments is greater than a preset threshold, if not, continue to maintain the monitoring state; if greater, continue to determine whether the RGB value of the local mutation in the thermal imaging temperature distribution map is greater than the preset threshold, and whether the difference ratio of the upper and lower widths of a certain part of the flow channel is greater than a preset threshold (for example, 40%), if not satisfied, continue to maintain monitoring; if satisfied, continue to determine whether the time under the condition of satisfying the previous step continues to exceed a preset time threshold, if satisfied, it is determined that congestion occurs, and wake up the water pump to clean the plate heat exchanger.

[0053] As can be seen from the above, in the embodiment of the present invention, the embodiment of the present invention can detect whether the plate heat exchanger is blocked, and accurately find the blockage position to facilitate the smooth progress of subsequent cleaning work, and by detecting the change in the water flow, according to the different blur levels within a certain period of time, the Laplace variance algorithm is then used to calculate the blurring degree of the images before and after. When the calculated blurring degree difference is greater than the set threshold, it is used as the preliminary condition for blocking judgment. The temperature distribution map of the surface of the object is obtained by shooting the heat exchanger image with a thermal imaging camera. After blocking, the local temperature will rise and the color will deepen. The RGB value in the image is calculated by using the statistical characteristic method of color parameters. According to the difference between the RGB value of the blocked area and the RGB value of the normal area, the blockage of the target area is confirmed, and the local temperature image after blocking will also show a certain area of ​​color diffusion. The next step is to extract the contour of the range image. The average width of the contour of the blocked area will have a singular change in value relative to the contour of its surroundings. Finally, the location of the blockage of the plate heat exchanger can be accurately located according to the coordinate system. In this way, the start and stop of the water pump can be used to promote the flow of impurity deposits, thereby accurately locating the cleaning heat exchanger to ensure the stable operation of the system.

[0054] Example 2

[0055] According to another aspect of an embodiment of the present invention, a device for determining heat exchanger fault information is further provided. The device for determining heat exchanger fault information uses the method for determining heat exchanger fault information in the above-mentioned embodiment 1. Figure 5 is a schematic diagram of a device for determining heat exchanger fault information according to an embodiment of the present invention. Figure 5 As shown, the heat exchanger fault information determination device includes: a first acquisition module 51, a second acquisition module 53 and a determination module 55. The heat exchanger fault information determination device is described below.

[0056] The first acquisition module 51 is used to acquire a first water flow picture and a second water flow picture of a heat exchanger interface, wherein the first water flow picture and the second water flow picture are pictures collected at different times.

[0057] The second acquisition module 53 is used to obtain the temperature distribution diagram during the operation of the heat exchanger when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first preset threshold, wherein the first preset threshold is a preset blurriness threshold of the water flow image.

[0058] The determination module 55 is configured to determine the fault information of the heat exchanger based on the temperature distribution diagram.

[0059] It should be noted that the first acquisition module 51, the second acquisition module 53 and the determination module 55 correspond to steps S102 to S106 in Embodiment 1, and the examples and application scenarios implemented by the modules and the corresponding steps are the same, but are not limited to the contents disclosed in Embodiment 1. It should be noted that the modules as part of the device can be executed in a computer system such as a set of computer executable instructions.

[0060] As can be seen from the above, in the embodiment of the present invention, the first acquisition module 51 can be used to first acquire the first water flow image and the second water flow image of the heat exchanger interface, wherein the first water flow image and the second water flow image are images collected at different times; then, the second acquisition module 53 is used to acquire the temperature distribution diagram of the heat exchanger during operation when it is determined that the difference in blur between the first water flow image and the second water flow image is greater than the first predetermined threshold, wherein the first preset threshold is the preset blur threshold of the water flow image; finally, the determination module 55 is used to determine the fault information of the heat exchanger based on the temperature distribution diagram. Through the heat exchanger fault information determination device of the embodiment of the present invention, the purpose of determining the fault information of the heat exchanger based on the acquired water flow image and temperature distribution diagram of the heat exchanger interface is achieved, thereby achieving the technical effect of improving the fault detection efficiency of the plate heat exchanger, and further solving the technical problems in the related technology that the channels between the plates of the plate heat exchanger are easily blocked and the manual detection of blockage is inefficient and there are safety hazards.

[0061] Optionally, the device also includes: a third acquisition module, used to obtain the first blur degree and the second blur degree of the first water flow image and the second water flow image respectively using a preset algorithm before determining that the blur degree difference between the first water flow image and the second water flow image is greater than a first predetermined threshold; a calculation module, used to calculate the difference between the first blur degree and the second blur degree and take the absolute value to obtain the blur degree difference.

[0062] Optionally, the preset algorithm includes one of the following: Laplace algorithm, floating-point algorithm.

[0063] Optionally, the determination module includes: a first extraction unit, which extracts RGB differences in the temperature distribution map, wherein the RGB difference is the difference between an abnormal RGB value area and other areas in the temperature distribution map; a second extraction unit, which is used to extract contour information in the temperature distribution map, wherein the contour information is a difference ratio between an upper and lower width range of a working temperature flow channel; and a determination unit, which is used to determine the fault information based on the RGB difference and the contour information.

[0064] Optionally, the determination unit includes: a first determination subunit, used to determine whether there is a first target area in the temperature distribution map, the first target area is an area in the temperature distribution map where the RGB difference is greater than a second preset threshold, wherein the second preset threshold is an RGB preset difference threshold; a second determination subunit, used to determine whether there is a second target area in the temperature distribution map, the second target area is an area in the temperature distribution map where the contour information is greater than a third preset threshold, wherein the third preset threshold is a preset contour information threshold; a third determination subunit, used to determine whether the water inlet is blocked when it is determined that the first target area and the second target area exist; a fourth determination subunit, used to determine the fault information including the fault location based on the position information of the first target area and the position information of the second target area when it is determined that the water inlet is blocked.

[0065] Optionally, the third determination subunit includes: a receiving subunit, used to receive the fault information; a judgment subunit, used to determine that a congestion condition occurs after determining that the time after receiving the fault information exceeds a fourth preset threshold; wherein the fourth preset threshold is a time preset threshold after receiving the fault information.

[0066] Optionally, the device further includes: a control module, configured to control a water pump to clean the faulty position of the heat exchanger after determining the fault information of the heat exchanger based on the temperature distribution map.

[0067] Example 3

[0068] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed by a processor, the device where the computer-readable storage medium is located is controlled to execute any of the above-mentioned methods for determining heat exchanger fault information.

[0069] Example 4

[0070] According to another aspect of an embodiment of the present invention, a processor is further provided, the processor being used to run a computer program, wherein the computer program executes any one of the above-mentioned methods for determining heat exchanger fault information when running.

[0071] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0072] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0074] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0075] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0076] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining heat exchanger fault information, characterized in that: include: Acquire a first water flow picture and a second water flow picture of a heat exchanger interface, wherein the first water flow picture and the second water flow picture are pictures collected at different times; When it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first preset threshold, a temperature distribution diagram of the heat exchanger during operation is obtained, wherein the first preset threshold is a preset blurriness threshold of the water flow image; Fault information of the heat exchanger is determined based on the temperature distribution map.

2. The method according to claim 1, characterized in that Before determining that the difference in blur degree between the first water flow image and the second water flow image is greater than a first predetermined threshold, the method further includes: Obtain a first blur degree and a second blur degree of the first water flow image and the second water flow image respectively using a preset algorithm; The difference between the first blur degree and the second blur degree is calculated and the absolute value is taken to obtain the blur degree difference.

3. The method according to claim 2, characterized in that The preset algorithm includes one of the following: Laplace algorithm, floating point algorithm.

4. The method according to claim 1, characterized in that: Determining fault information of the heat exchanger based on the temperature distribution map includes: Extracting RGB difference values ​​in the temperature distribution map, wherein the RGB difference value is a difference between an abnormal RGB value region and other regions in the temperature distribution map; Extracting contour information from the temperature distribution diagram, wherein the contour information is a difference ratio between an upper and a lower width range of a working temperature flow channel; The fault information is determined according to the RGB difference and the contour information.

5. The method according to claim 4, characterized in that Determining the fault information according to the RGB difference and the contour information includes: Determine whether there is a first target area in the temperature distribution map, the first target area being an area in the temperature distribution map where the RGB difference is greater than a second preset threshold, wherein the second preset threshold is an RGB preset difference threshold; Determine whether there is a second target area in the temperature distribution map, the second target area being an area in the temperature distribution map where the profile information is greater than a third preset threshold, wherein the third preset threshold is a preset profile information threshold; In the case where it is determined that the first target area and the second target area exist, determining whether the water inlet is blocked; When it is determined that the water inlet is blocked, the fault information including the fault location is determined according to the location information of the first target area and the location information of the second target area.

6. The method according to claim 5, characterized in that In the case where it is determined that the first target area and the second target area exist, determining whether the water inlet is blocked includes: receiving the fault information; After determining that the fault information received exceeds a fourth preset threshold, determining that a congestion condition occurs; The fourth preset threshold is a time preset threshold after receiving the fault information.

7. The method according to any one of claims 1 to 5, characterized in that After determining the fault information of the heat exchanger based on the temperature distribution map, the method further includes: The water pump is controlled to clean the faulty position of the heat exchanger.

8. A device for determining heat exchanger fault information, characterized in that: include: A first acquisition module is used to acquire a first water flow picture and a second water flow picture of a heat exchanger interface, wherein the first water flow picture and the second water flow picture are pictures collected at different times; A second acquisition module is used to acquire a temperature distribution diagram of the heat exchanger during operation when it is determined that the difference in blurriness between the first water flow image and the second water flow image is greater than a first preset threshold, wherein the first preset threshold is a preset blurriness threshold of the water flow image; A determination module is used to determine the fault information of the heat exchanger based on the temperature distribution map.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed by a processor, the device where the computer-readable storage medium is located is controlled to execute the method for determining heat exchanger fault information as described in any one of claims 1 to 7.

10. A processor, characterized in that: The processor is used to run a computer program, wherein the computer program executes the method for determining heat exchanger fault information according to any one of claims 1 to 7 when running.

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