Control method and device of refrigerating unit, refrigerating unit and storage medium

Abstract

The invention relates to a control method and device of a refrigerating unit, the refrigerating unit and a storage medium, the refrigerating unit comprises n heat exchange pipelines and n electronic expansion valves, the i-th electronic expansion valve is arranged on the i-th heat exchange pipeline, i is an integer larger than or equal to 1 and smaller than or equal to n. The method comprises the steps that when the refrigerating unit operates in a refrigerating mode, n is an integer larger than or equal to 1, n is an integer larger than or equal to 1; cross section images of all the heat exchange pipelines are obtained in sequence; the frosting thickness of the i-th heat exchange pipeline is determined according to the section image of the i-th heat exchange pipeline; and the opening degree of the ith electronic expansion valve is controlled according to the frosting thickness of the ith heat exchange pipeline, so that the frosting thicknesses of all the heat exchange pipelines are controlled to be the same. According to the technical scheme, the technical problem that the frosting conditions of different heat exchange pipelines of the refrigerating unit are different is solved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration equipment, and in particular to a control method and device for a refrigeration unit, a refrigeration unit and a storage medium. Background Art

[0002] Refrigeration units are widely used in various freezing and refrigeration scenarios, such as cold chain scenarios. The goods transported in the cold chain are usually fruits, vegetables or seafood with a short shelf life. In order to ensure that these goods will not spoil during the cold chain transportation process, the refrigeration units used to cool the cold chain usually operate at a lower temperature for a long time.

[0003] The refrigeration unit will have frost problems when running at a low temperature for a long time. Due to the difference in heat exchange effects between different heat exchange pipes in the refrigeration unit, the frost conditions of different heat exchange pipes are different. When the frost conditions of different heat exchange pipes are inconsistent, it may further affect the refrigeration effect of different heat exchange pipes. Summary of the invention

[0004] The present application provides a control method and device for a refrigeration unit, a refrigeration unit and a storage medium to solve the technical problem that the frost conditions of different heat exchange pipes of the refrigeration unit are different.

[0005] In a first aspect, the present application provides a control method for a refrigeration unit, the refrigeration unit comprising n heat exchange pipelines and n electronic expansion valves, the i-th electronic expansion valve being arranged on the i-th heat exchange pipeline, i being an integer greater than or equal to 1 and less than or equal to n, the method comprising:

[0006] When the refrigeration unit is operating in a refrigeration mode, sequentially acquiring a cross-sectional image of each of the heat exchange pipelines;

[0007] Determine the frosting thickness of the heat exchange pipeline in the i-th item according to the cross-sectional image of the heat exchange pipeline in the i-th item;

[0008] The opening of the i-th electronic expansion valve is controlled according to the frosting thickness of the i-th heat exchange pipeline, so as to control the frosting thickness of each heat exchange pipeline to be the same.

[0009] In a feasible embodiment of the present application, a camera device and a moving mechanism are provided in the refrigeration unit, the camera device is installed on the moving mechanism, and the moving mechanism is used to drive the camera device to move, and sequentially obtain cross-sectional images of each of the heat exchange pipelines, including:

[0010] Respectively obtain the position information of each heat exchange pipeline;

[0011] Controlling the moving mechanism to move according to the position information of the heat exchange pipeline, so that the moving mechanism drives the camera device to move to the position of each heat exchange pipeline in sequence;

[0012] When the camera device moves to the position where the i-th heat exchange pipeline is located, controlling the camera device to capture the cross-sectional image of the i-th heat exchange pipeline;

[0013] The cross-sectional image transmitted by the imaging device is acquired.

[0014] In a feasible embodiment of the present application, determining the frosting thickness of the heat exchange pipeline in the i-th item according to the cross-sectional image of the heat exchange pipeline in the i-th item includes:

[0015] Obtaining a first pipe diameter of the heat exchange pipeline of the i-th item; wherein the first pipe diameter is the pipe diameter of the heat exchange pipeline of the i-th item when it is not frosted;

[0016] Determine a second pipe diameter of the i-th heat exchange pipe according to the cross-sectional image of the i-th heat exchange pipe; wherein the second pipe diameter is the pipe diameter of the i-th heat exchange pipe in the cross-sectional image;

[0017] The difference between the second tube diameter and the first tube diameter is calculated, and half of the difference between the second tube diameter and the first tube diameter is used as the frosting thickness of the i-th heat exchange pipeline.

[0018] In a feasible embodiment of the present application, controlling the opening of the i-th electronic expansion valve according to the frosting thickness of the i-th heat exchange pipeline includes:

[0019] Get the preset standard frosting thickness;

[0020] When the frost thickness of the ith heat exchange pipeline is less than the standard frost thickness, controlling the opening of the ith electronic expansion valve to increase by a preset opening value;

[0021] When the frost thickness of the i-th heat exchange pipeline is greater than the standard frost thickness, the opening of the i-th electronic expansion valve is controlled to decrease by a preset opening value.

[0022] In a feasible embodiment of the present application, controlling the opening of the i-th electronic expansion valve according to the frosting thickness of the i-th heat exchange pipeline includes:

[0023] Calculating an average frosting thickness according to the frosting thickness of each of the heat exchange pipes;

[0024] When the frost thickness of the ith heat exchange pipeline is less than the average frost thickness, controlling the opening of the ith electronic expansion valve to increase by a preset opening value;

[0025] When the frost thickness of the i-th heat exchange pipeline is greater than the average frost thickness, the opening of the i-th electronic expansion valve is controlled to decrease by a preset opening value.

[0026] In a feasible embodiment of the present application, after calculating the average frost thickness according to the frost thickness of each of the heat exchange pipes, the method further includes:

[0027] When the absolute value of the difference between the frost thickness of the i-th heat exchange pipeline and the average frost thickness is less than a preset absolute value threshold, the opening degree of the i-th electronic expansion valve is controlled to remain unchanged.

[0028] In a feasible embodiment of the present application, after controlling the opening of the i-th electronic expansion valve according to the frost thickness of the i-th heat exchange pipeline, the method further includes:

[0029] When the frost thickness of the heat exchange pipeline in the i-th item is greater than a preset frost thickness threshold, the refrigeration unit is controlled to operate in a defrosting mode.

[0030] In a second aspect, the present application provides a control device for a refrigeration unit, the device comprising:

[0031] An acquisition module, used for sequentially acquiring cross-sectional images of each of the heat exchange pipelines when the refrigeration unit is operating in a refrigeration mode;

[0032] A determination module, configured to determine the frosting thickness of the ith heat exchange pipeline according to the cross-sectional image of the ith heat exchange pipeline;

[0033] The first control module is used to control the opening of the i-th electronic expansion valve according to the frost thickness of the i-th heat exchange pipeline, so as to control the frost thickness of each heat exchange pipeline to be the same.

[0034] In a third aspect, the present application provides a refrigeration unit, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; at least one memory connected to the at least one bus, wherein the processor is configured to execute a control method for a refrigeration unit described in the first aspect of the present application.

[0035] In a fourth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute a control method for a refrigeration unit as described in the first aspect of the present application.

[0036] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0037] The method provided in the embodiment of the present application obtains cross-sectional images of each heat exchange pipeline in sequence when the refrigeration unit operates in the refrigeration mode; determines the frost thickness of the ith heat exchange pipeline according to the cross-sectional image of the ith heat exchange pipeline; and controls the opening of the ith electronic expansion valve according to the frost thickness of the ith heat exchange pipeline to control the frost thickness of each heat exchange pipeline to be the same.

[0038] It can be seen that through the technical solution provided in the embodiment of the present application, the frost thickness of the heat exchange pipeline is monitored in real time, and the opening of the electronic expansion valve is adjusted based on the frost thickness of the heat exchange pipeline, thereby adjusting the flow rate of the refrigerant in the heat exchange pipeline, and making the heat exchange effects of each heat exchange pipeline consistent as much as possible, thereby solving the technical problem of different frost conditions of different heat exchange pipelines of the refrigeration unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0042] Figure 1 A schematic diagram of the structure of a refrigeration unit to which a control method for a refrigeration unit provided in an embodiment of the present application can be applied;

[0043] Figure 2 A schematic flow chart of a control method for a refrigeration unit provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a control device for a refrigeration unit provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a refrigeration unit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0048] In order to solve the technical problem in the prior art that the frosting conditions of different heat exchange pipes of a refrigeration unit are different, the present application provides a control method, device, refrigeration unit and storage medium for a refrigeration unit, so as to keep the frosting conditions of each heat exchange pipe consistent as much as possible.

[0049] A control method for a refrigeration unit provided in an embodiment of the present application is applied to a refrigeration unit. The method can specifically use a control mainboard in the refrigeration unit as an execution subject. In some possible examples, the structural diagram of the refrigeration unit is as follows: Figure 1 shown.

[0050] Reference Figure 1 The refrigeration unit may include an external unit of the refrigeration unit, an air cooler of the refrigeration unit, a control mainboard and a monitoring module. The external unit of the refrigeration unit includes at least a compressor and a condenser. The air cooler of the refrigeration unit includes n heat exchange pipelines and n electronic expansion valves (the figure shows that it includes 3 heat exchange pipelines and 3 electronic expansion valves). The i-th electronic expansion valve is arranged on the i-th heat exchange pipeline. The monitoring module is arranged in the air cooler of the refrigeration unit. The refrigerant outlet end of the external unit of the refrigeration unit is connected to the refrigerant inlet end of each heat exchange pipeline, and the refrigerant inlet end of the external unit of the refrigeration unit is connected to the refrigerant outlet end of each heat exchange pipeline.

[0051] The monitoring module is connected to the control mainboard. The monitoring module at least includes a camera device, which can specifically be a camera with a data transmission function. The monitoring module and the control mainboard communicate with each other.

[0052] The control main board is also connected to each electronic expansion valve, and the control main board can control the opening of each electronic expansion valve, thereby controlling the flow of refrigerant flowing into each heat exchange pipeline.

[0053] When the refrigeration unit is needed to cool, the control main board controls the refrigeration unit to operate in the cooling mode. The compressor in the outdoor unit of the refrigeration unit discharges high-temperature and high-pressure refrigerant at the exhaust end. The high-temperature and high-pressure refrigerant passes through the condenser in the outdoor unit of the refrigeration unit and is converted into low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant flows into each heat exchange pipeline from the refrigerant outlet end of the outdoor unit of the refrigeration unit. The low-temperature and low-pressure refrigerant exchanges heat with the external environment through each heat exchange pipeline, and is converted into high-temperature and high-pressure refrigerant again. It flows back to the outdoor unit of the refrigeration unit from the refrigerant outlet end of each heat exchange pipeline, completing a cycle to achieve refrigeration.

[0054] Figure 2 A flow chart of a control method for a refrigeration unit provided in an embodiment of the present application, referring to Figure 2 A control method for a refrigeration unit provided in an embodiment of the present application specifically includes the following steps:

[0055] S1: When the refrigeration unit is operating in a cooling mode, a cross-sectional image of each heat exchange pipeline is acquired in sequence;

[0056] Specifically, when the refrigeration unit is operating in the cooling mode, the control mainboard can obtain the cross-sectional image of each heat exchange pipeline in turn through the monitoring module.

[0057] In a feasible embodiment of the present application, the monitoring device may specifically include a camera device and a moving mechanism, the camera device is installed on the moving mechanism, and the moving mechanism is used to drive the camera device to move. When the moving mechanism drives the camera device to the location of any heat exchange pipeline, the camera device captures a cross-sectional image of the heat exchange pipeline.

[0058] In a feasible embodiment of the present application, refer to Figure 1 In the structure of the refrigeration unit shown, any heat exchange pipeline is bent in one direction. When the camera device in the monitoring device moves to the bending part of the heat exchange pipeline, an image is taken and sent to the control main board, so that the control main board obtains a cross-sectional image of the heat exchange pipeline.

[0059] In a feasible embodiment of the present application, cross-sectional images of each heat exchange pipeline are sequentially acquired, including:

[0060] Obtaining the position information of each heat exchange pipeline respectively;

[0061] Controlling the moving mechanism to move according to the position information of the heat exchange pipeline, so that the moving mechanism drives the camera device to move to the position of each heat exchange pipeline in sequence;

[0062] When the camera device moves to the position where the i-th heat exchange pipeline is located, the camera device is controlled to capture a cross-sectional image of the i-th heat exchange pipeline;

[0063] A cross-sectional image transmitted from the imaging device is acquired.

[0064] Specifically, the position information of each heat exchange pipeline is pre-stored at the control main board. When the refrigeration unit operates in the refrigeration mode, the control main board obtains the position information of each heat exchange pipeline, and controls the moving mechanism based on the position information of each heat exchange pipeline, so that the moving mechanism drives the camera device to move, and the camera device moves to the position of each heat exchange pipeline in turn. When the camera device moves to the position of the i-th heat exchange pipeline, the camera device is controlled to capture a cross-sectional image of the i-th heat exchange pipeline. After the camera device completes shooting, the cross-sectional image is sent to the control main board, and the control main board obtains the cross-sectional image sent by the camera device.

[0065] In some practical examples, in order to distinguish which heat exchange pipeline the cross-sectional image comes from, the cross-sectional image can be annotated based on the position information of the heat exchange pipeline. For example, if the i-th cross-sectional image is taken at the i-th position, then the i-th cross-sectional image is the cross-sectional image of the i-th heat exchange pipeline.

[0066] S2: determining the frost thickness of the i-th heat exchange pipeline according to the cross-sectional image of the i-th heat exchange pipeline;

[0067] Specifically, after the control main board obtains the cross-sectional image of the heat exchange pipeline, image analysis is performed on the cross-sectional image to determine the frost thickness of the heat exchange pipeline.

[0068] In a feasible embodiment of the present application, determining the frosting thickness of the i-th heat exchange pipeline according to the cross-sectional image of the i-th heat exchange pipeline includes:

[0069] Obtaining a first pipe diameter of the i-th heat exchange pipeline; wherein the first pipe diameter is the pipe diameter of the i-th heat exchange pipeline when it is not frosted;

[0070] Determining a second pipe diameter of the i-th heat exchange pipe according to the cross-sectional image of the i-th heat exchange pipe; wherein the second pipe diameter is the pipe diameter of the i-th heat exchange pipe in the cross-sectional image;

[0071] The difference between the second pipe diameter and the first pipe diameter is calculated, and half of the difference between the second pipe diameter and the first pipe diameter is taken as the frost thickness of the i-th heat exchange pipe.

[0072] Specifically, for the ith heat exchange pipeline, after the control main board obtains the cross-sectional image of the ith heat exchange pipeline, the first pipe diameter of the ith heat exchange pipeline is first obtained, where the first pipe diameter is the pipe diameter of the ith heat exchange pipeline when it is not frosted. Then, image analysis is performed on the cross-sectional image to first obtain the second pipe diameter of the ith heat exchange pipeline, and the frost thickness of the ith heat exchange pipeline is calculated based on the first pipe diameter and the second pipe diameter.

[0073] In a feasible embodiment of the present application, the first pipe diameter of the i-th heat exchange pipeline is data pre-stored in the control mainboard, and the control mainboard only needs to read data in the corresponding storage area to obtain the first pipe diameter of the i-th heat exchange pipeline.

[0074] In a feasible embodiment of the present application, the first pipe diameter of the i-th heat exchange pipeline is the pipe diameter identified by the control main board based on the first cross-sectional image. Specifically, when the refrigeration unit is not actually performing refrigeration, the control main board will obtain the first cross-sectional image of each heat exchange pipeline, and obtain the first pipe diameter of each heat exchange pipeline based on the image recognition of the first cross-sectional image. It can be understood that since the current refrigeration unit is not actually performing refrigeration, each heat exchange pipeline in the first cross-sectional image must not be frosted, so the first pipe diameter obtained based on the first cross-sectional image is the pipe diameter of the heat exchange pipeline when it is not frosted.

[0075] Based on the above embodiment, the second pipe diameter of the ith heat exchange pipeline is the pipe diameter identified by the control mainboard based on the second cross-sectional image. Specifically, after the control mainboard obtains the first cross-sectional image to determine the first pipe diameter of the ith heat exchange pipeline, the control mainboard can control the refrigeration unit to perform actual refrigeration. At this time, the cross-sectional image obtained is the second cross-sectional image, and the second pipe diameter of each heat exchange pipeline is obtained based on the image recognition of the second cross-sectional image. It can be understood that since the current refrigeration unit has actually performed refrigeration, each heat exchange pipeline in the second cross-sectional image has been frosted, so the second pipe diameter obtained based on the second cross-sectional image is the pipe diameter of the heat exchange pipeline after frosting.

[0076] In a feasible embodiment of the present application, the control mainboard determines the second pipe diameter of the i-th heat exchange pipeline from the cross-sectional image of the i-th heat exchange pipeline based on a preset image analysis model. The image analysis model is a classification model based on a neural network, and the specific scheme of the image analysis is similar to that in the prior art, which will not be described in detail here.

[0077] In a feasible embodiment of the present application, the control mainboard can calculate the frosting thickness of the i-th heat exchange pipeline based on the frosting thickness calculation formula, and the frosting thickness calculation formula is specifically:

[0078] Hi=(X2i-X1i) / 2;

[0079] Wherein, Hi is the frost thickness of the i-th heat exchange pipeline, X1i is the first pipe diameter of the i-th heat exchange pipeline, and X2i is the second pipe diameter of the i-th heat exchange pipeline.

[0080] S3: controlling the opening of the i-th electronic expansion valve according to the frost thickness of the i-th heat exchange pipeline, so as to control the frost thickness of each heat exchange pipeline to be the same;

[0081] Specifically, the control main board controls the opening of the ith electronic expansion valve according to the frost thickness of the ith heat exchange pipeline, thereby controlling the flow rate of the refrigerant in the ith heat exchange pipeline, thereby controlling the actual heat exchange effect of the ith heat exchange pipeline, so that the frost thickness of each heat exchange pipeline is the same.

[0082] In a feasible embodiment of the present application, the opening of the i-th electronic expansion valve is controlled according to the frost thickness of the i-th heat exchange pipeline, including:

[0083] Get the preset standard frosting thickness;

[0084] When the frost thickness of the i-th heat exchange pipeline is less than the standard frost thickness, the opening of the i-th electronic expansion valve is controlled to increase by a preset opening value;

[0085] When the frost thickness of the i-th heat exchange pipeline is greater than the standard frost thickness, the opening of the i-th electronic expansion valve is controlled to decrease by a preset opening value.

[0086] Specifically, the control main board obtains a standard frost thickness pre-stored in the control main board, and the standard frost thickness may be data pre-measured by a technician. When the control main board determines the frost thickness of the ith heat exchange pipeline, if the frost thickness of the ith heat exchange pipeline is less than the standard frost thickness, the opening of the ith electronic expansion valve is controlled to increase by a preset opening value; if the frost thickness of the ith heat exchange pipeline is greater than the standard frost thickness, the opening of the ith electronic expansion valve is controlled to decrease by a preset opening value.

[0087] It can be understood that if the frost thickness of the ith heat exchange pipeline is less than the standard frost thickness, it means that the actual heat exchange effect of the current ith heat exchange pipeline has not met expectations. At this time, the opening of the ith electronic expansion valve is controlled to increase the preset opening value, increase the flow rate of the refrigerant in the ith heat exchange pipeline, and improve the actual heat exchange effect of the ith heat exchange pipeline, so that the frost thickness of the ith heat exchange pipeline increases; if the frost thickness of the ith heat exchange pipeline is greater than the standard frost thickness, it means that the actual heat exchange effect of the current ith heat exchange pipeline exceeds expectations. At this time, the opening of the ith electronic expansion valve is controlled to decrease the preset opening value, reduce the flow rate of the refrigerant in the ith heat exchange pipeline, reduce the actual heat exchange effect of the ith heat exchange pipeline, and reduce the frost thickness of the ith heat exchange pipeline.

[0088] In a feasible embodiment of the present application, the increased or decreased preset opening value may be 1% of the maximum opening value of the electronic expansion valve.

[0089] In the above embodiment, the opening of the electronic expansion valve of the i-th heat exchange pipeline is controlled according to the frost thickness of the i-th heat exchange pipeline and the preset standard frost thickness. However, if the frost thickness of each heat exchange pipeline is significantly different from the standard frost thickness, the control cycle is longer. Therefore, in a feasible embodiment of the present application, the opening of the i-th electronic expansion valve is controlled according to the frost thickness of the i-th heat exchange pipeline, including:

[0090] Calculate the average frost thickness based on the frost thickness of each heat exchange pipe;

[0091] When the frost thickness of the i-th heat exchange pipeline is less than the average frost thickness, the opening of the i-th electronic expansion valve is controlled to increase by a preset opening value;

[0092] When the frost thickness of the i-th heat exchange pipeline is greater than the average frost thickness, the opening of the i-th electronic expansion valve is controlled to decrease by a preset opening value;

[0093] as well as,

[0094] When the absolute value of the difference between the frost thickness of the i-th heat exchange pipeline and the average frost thickness is less than a preset absolute value threshold, the opening degree of the i-th electronic expansion valve is controlled to remain unchanged.

[0095] Specifically, the control main board repeatedly executes multiple control stages. In the first control stage, the control main board first obtains cross-sectional images of all heat exchange pipelines to determine the frost thickness of all heat exchange pipelines, and calculates the average frost thickness based on the frost thickness of all heat exchange pipelines.

[0096] After determining the average frost thickness, the control main board enters the second control stage. At this time, the control main board obtains the cross-sectional image of the ith heat exchange pipeline from the first heat exchange pipeline to the nth heat exchange pipeline in sequence, so as to determine the frost thickness of the ith heat exchange pipeline. After obtaining the frost thickness of the ith heat exchange pipeline, the control method for the ith electronic expansion valve is determined based on the comparison result of the frost thickness of the ith heat exchange pipeline and the average frost thickness.

[0097] When the control main board completes the control of the nth electronic expansion valve, it exits the second control stage and re-enters the first control stage, and then cycles through the first control stage and the second control stage to adjust the frost thickness of each heat exchange pipeline in real time.

[0098] The method provided in the embodiment of the present application obtains cross-sectional images of each heat exchange pipeline in sequence when the refrigeration unit operates in the refrigeration mode; determines the frost thickness of the ith heat exchange pipeline according to the cross-sectional image of the ith heat exchange pipeline; and controls the opening of the ith electronic expansion valve according to the frost thickness of the ith heat exchange pipeline to control the frost thickness of each heat exchange pipeline to be the same.

[0099] It can be seen that through the technical solution provided in the embodiment of the present application, the frost thickness of the heat exchange pipeline is monitored in real time, and the opening of the electronic expansion valve is adjusted based on the frost thickness of the heat exchange pipeline, thereby adjusting the flow rate of the refrigerant in the heat exchange pipeline, and making the heat exchange effects of each heat exchange pipeline consistent as much as possible, thereby solving the technical problem of different frost conditions of different heat exchange pipelines of the refrigeration unit.

[0100] In a feasible embodiment of the present application, a control mainboard is further provided to continuously monitor the frost thickness of each heat exchange pipeline, so as to intelligently realize defrosting of the refrigeration unit, and after controlling the opening of the i-th electronic expansion valve according to the frost thickness of the i-th heat exchange pipeline, the method further includes:

[0101] When the frost thickness of the i-th heat exchange pipeline is greater than a preset frost thickness threshold, the refrigeration unit is controlled to operate in a defrosting mode.

[0102] Specifically, when the control main board determines that the frost thickness of the i-th heat exchange pipe is greater than the preset frost thickness threshold, it means that the current frost condition of the refrigeration unit has seriously affected the operation of the refrigeration unit. At this time, the control main board controls the refrigeration unit to exit the refrigeration model and start running the defrost mode.

[0103] In some practical examples, the heat exchange pipeline can be defrosted by outputting high-temperature and high-pressure refrigerant to the heat exchange pipeline through the external unit of the refrigeration unit.

[0104] In a feasible embodiment of the present application, the frost thickness threshold may be set to 3.5 mm.

[0105] In a feasible embodiment of the present application, when the refrigeration unit operates in the defrost mode, in order to realize continuous monitoring of the defrost effect, the control main board controls the defrost condition of each heat exchange pipeline according to the frost thickness of each heat exchange pipeline.

[0106] Specifically, when the refrigeration unit is operating in the defrost mode, the control main board continues to obtain the cross-sectional image of each heat exchange pipeline in turn to determine the frost thickness of each heat exchange pipeline. When the frost thickness of the ith heat exchange pipeline is less than the preset value, the ith electronic expansion valve is controlled to close, and the ith heat exchange pipeline will no longer continue to defrost. At the same time, the control main board will no longer obtain the cross-sectional image of the ith heat exchange pipeline. When the frost thickness of all heat exchange pipelines is less than the preset value, the control main board controls the refrigeration unit to exit the defrost mode.

[0107] Corresponding to the above method embodiment, the present application embodiment provides a control device for a refrigeration unit, Figure 3 A schematic diagram of a control device for a refrigeration unit provided in an embodiment of the present application, referring to Figure 3 , the device specifically comprises:

[0108] The acquisition module 301 is used to sequentially acquire cross-sectional images of each heat exchange pipeline when the refrigeration unit is operating in a refrigeration mode;

[0109] A determination module 302 is used to determine the frost thickness of the i-th heat exchange pipeline according to the cross-sectional image of the i-th heat exchange pipeline;

[0110] The first control module 303 is used to control the opening of the i-th electronic expansion valve according to the frost thickness of the i-th heat exchange pipeline, so as to control the frost thickness of each heat exchange pipeline to be the same.

[0111] In a feasible embodiment of the present application, a camera device and a moving mechanism are provided in the refrigeration unit, the camera device is installed on the moving mechanism, and the moving mechanism is used to drive the camera device to move. The acquisition module 301 includes:

[0112] A first acquisition unit, used to respectively acquire the position information of each heat exchange pipeline;

[0113] A first control unit is used to control the movement mechanism to move according to the position information of the heat exchange pipeline, so that the movement mechanism drives the camera device to move to the position of each heat exchange pipeline in sequence;

[0114] A second control unit, configured to control the camera device to capture a cross-sectional image of the i-th heat exchange pipeline when the camera device moves to the position where the i-th heat exchange pipeline is located;

[0115] The second acquisition unit is used to acquire the cross-sectional image sent by the imaging device.

[0116] In a feasible embodiment of the present application, the determination module 302 includes:

[0117] A third acquisition unit is used to acquire a first pipe diameter of the i-th heat exchange pipeline; wherein the first pipe diameter is the pipe diameter of the i-th heat exchange pipeline when it is not frosted;

[0118] A determination unit, configured to determine a second pipe diameter of the i-th heat exchange pipe according to the cross-sectional image of the i-th heat exchange pipe; wherein the second pipe diameter is the pipe diameter of the i-th heat exchange pipe in the cross-sectional image;

[0119] The first calculation unit is used to calculate the difference between the second pipe diameter and the first pipe diameter, and take half of the difference between the second pipe diameter and the first pipe diameter as the frost thickness of the i-th heat exchange pipeline.

[0120] In a feasible embodiment of the present application, the control module 303 includes:

[0121] A fourth obtaining unit, used for obtaining a preset standard frosting thickness;

[0122] A third control unit is used to control the opening of the i-th electronic expansion valve to increase a preset opening value when the frost thickness of the i-th heat exchange pipeline is less than a standard frost thickness;

[0123] The fourth control unit is used to control the opening of the i-th electronic expansion valve to reduce a preset opening value when the frost thickness of the i-th heat exchange pipeline is greater than a standard frost thickness.

[0124] In a feasible embodiment of the present application, the control module 303 includes:

[0125] The second calculation unit is used to calculate the average frost thickness according to the frost thickness of each heat exchange pipeline;

[0126] a fifth control unit, configured to control the opening of the i-th electronic expansion valve to increase a preset opening value when the frost thickness of the i-th heat exchange pipeline is less than the average frost thickness;

[0127] The sixth control unit is used to control the opening of the i-th electronic expansion valve to reduce a preset opening value when the frost thickness of the i-th heat exchange pipeline is greater than the average frost thickness.

[0128] In a feasible embodiment of the present application, the control module 303 further includes:

[0129] The seventh control unit is used to control the opening of the i-th electronic expansion valve to remain unchanged when the absolute value of the difference between the frost thickness of the i-th heat exchange pipeline and the average frost thickness is less than a preset absolute value threshold.

[0130] In a feasible embodiment of the present application, the device further includes:

[0131] The second control module is used to control the refrigeration unit to operate in a defrosting mode when the frost thickness of the i-th heat exchange pipeline is greater than a preset frost thickness threshold.

[0132] like Figure 4 As shown, the embodiment of the present application provides a refrigeration unit, including a processor 401, a communication interface 402, a memory 403 and a communication bus 404, wherein the processor 401, the communication interface 402, and the memory 403 communicate with each other through the communication bus 404.

[0133] Memory 403, used for storing computer programs;

[0134] In one embodiment of the present application, the processor 401 is used to execute the program stored in the memory 403 to implement a control method of a refrigeration unit provided by any of the above method embodiments, for example, including:

[0135] When the refrigeration unit is operating in a cooling mode, a cross-sectional image of each heat exchange pipeline is acquired in sequence;

[0136] Determine the frost thickness of the i-th heat exchange pipeline according to the cross-sectional image of the i-th heat exchange pipeline;

[0137] The opening of the i-th electronic expansion valve is controlled according to the frost thickness of the i-th heat exchange pipeline, so as to control the frost thickness of each heat exchange pipeline to be the same.

[0138] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of a method for controlling a refrigeration unit provided in any of the aforementioned method embodiments are implemented.

[0139] The device embodiments described above are merely illustrative, wherein 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 network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0140] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0141] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0142] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A control method for a refrigeration unit, characterized in that: The refrigeration unit includes n heat exchange pipelines and n electronic expansion valves, the i-th electronic expansion valve is arranged on the i-th heat exchange pipeline, i is an integer greater than or equal to 1 and less than or equal to n, and the method includes: When the refrigeration unit is operating in a refrigeration mode, sequentially acquiring a cross-sectional image of each of the heat exchange pipelines; Determine the frosting thickness of the heat exchange pipeline in the i-th item according to the cross-sectional image of the heat exchange pipeline in the i-th item; The opening of the i-th electronic expansion valve is controlled according to the frosting thickness of the i-th heat exchange pipeline, so as to control the frosting thickness of each heat exchange pipeline to be the same.

2. The method according to claim 1, characterized in that The refrigeration unit is provided with a camera device and a moving mechanism, the camera device is installed on the moving mechanism, and the moving mechanism is used to drive the camera device to move, and sequentially obtain the cross-sectional images of each of the heat exchange pipelines, including: Respectively obtain the position information of each heat exchange pipeline; Controlling the moving mechanism to move according to the position information of the heat exchange pipeline, so that the moving mechanism drives the camera device to move to the position of each heat exchange pipeline in sequence; When the camera device moves to the position where the i-th heat exchange pipeline is located, controlling the camera device to capture the cross-sectional image of the i-th heat exchange pipeline; The cross-sectional image transmitted by the imaging device is acquired.

3. The method according to claim 2, characterized in that Determining the frosting thickness of the heat exchange pipeline in the i-th item according to the cross-sectional image of the heat exchange pipeline in the i-th item comprises: Obtaining a first pipe diameter of the heat exchange pipeline of the i-th item; wherein the first pipe diameter is the pipe diameter of the heat exchange pipeline of the i-th item when it is not frosted; Determine a second pipe diameter of the i-th heat exchange pipe according to the cross-sectional image of the i-th heat exchange pipe; wherein the second pipe diameter is the pipe diameter of the i-th heat exchange pipe in the cross-sectional image; The difference between the second tube diameter and the first tube diameter is calculated, and half of the difference between the second tube diameter and the first tube diameter is used as the frosting thickness of the i-th heat exchange pipeline.

4. The method according to claim 3, characterized in that: Controlling the opening of the i-th electronic expansion valve according to the frosting thickness of the i-th heat exchange pipeline comprises: Get the preset standard frosting thickness; When the frost thickness of the ith heat exchange pipeline is less than the standard frost thickness, controlling the opening of the ith electronic expansion valve to increase by a preset opening value; When the frost thickness of the i-th heat exchange pipeline is greater than the standard frost thickness, the opening of the i-th electronic expansion valve is controlled to decrease by a preset opening value.

5. The method according to claim 3, characterized in that: Controlling the opening of the i-th electronic expansion valve according to the frosting thickness of the i-th heat exchange pipeline comprises: Calculating an average frosting thickness according to the frosting thickness of each of the heat exchange pipes; When the frost thickness of the ith heat exchange pipeline is less than the average frost thickness, controlling the opening of the ith electronic expansion valve to increase by a preset opening value; When the frost thickness of the i-th heat exchange pipeline is greater than the average frost thickness, the opening of the i-th electronic expansion valve is controlled to decrease by a preset opening value.

6. The method according to claim 5, characterized in that After calculating the average frosting thickness according to the frosting thickness of each of the heat exchange pipes, the method further comprises: When the absolute value of the difference between the frost thickness of the i-th heat exchange pipeline and the average frost thickness is less than a preset absolute value threshold, the opening degree of the i-th electronic expansion valve is controlled to remain unchanged.

7. The method according to claim 1, characterized in that After controlling the opening of the i-th electronic expansion valve according to the frosting thickness of the i-th heat exchange pipeline, the method further includes: When the frost thickness of the heat exchange pipeline in the i-th item is greater than a preset frost thickness threshold, the refrigeration unit is controlled to operate in a defrosting mode.

8. A control device for a refrigeration unit, characterized in that: The device comprises: An acquisition module, used for sequentially acquiring cross-sectional images of each of the heat exchange pipelines when the refrigeration unit is operating in a refrigeration mode; a determination module, configured to determine the frosting thickness of the ith heat exchange pipeline according to the cross-sectional image of the ith heat exchange pipeline; The first control module is used to control the opening of the i-th electronic expansion valve according to the frost thickness of the i-th heat exchange pipeline, so as to control the frost thickness of each heat exchange pipeline to be the same.

9. A refrigeration unit, characterized in that: The refrigeration unit includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; the memory is used to store a computer program; and the processor is used to implement the control method of the refrigeration unit according to any one of claims 1 to 7 when executing the computer program.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the refrigeration unit according to any one of claims 1 to 7 is implemented.

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