CN113418347B - Method, device, system and medium for clearing accumulated snow of refrigerating unit external unit of refrigerator car - Google Patents
Method, device, system and medium for clearing accumulated snow of refrigerating unit external unit of refrigerator car Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004140 cleaning Methods 0.000 claims abstract description 58
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/20—Carts specially adapted for transporting objects to be cooled
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/22—Cleaning means for refrigerating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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Abstract
The application relates to a snow cleaning method for an outer unit of a refrigerator truck refrigerating unit, a device, a system and a storage medium, whether snow needs to be cleaned is judged by detecting snow coverage conditions of an air outlet snow of the outer unit of the refrigerator truck refrigerating unit, snow cleaning operation is immediately carried out when snow needs to be cleaned, snow coverage data of an air outlet snow of the outer unit of the refrigerator truck refrigerating unit are obtained again at certain intervals, so that snow coverage conditions of an air outlet snow of the outer unit of the refrigerator truck refrigerating unit can be updated and known, snow cleaning can be guaranteed, and meanwhile the situation that snow is in a snow cleaning mode for a long time to influence energy consumption of a whole machine can be avoided.
Description
Technical Field
The application relates to the technical field of refrigerated vehicles, in particular to a method, a device and a system for cleaning accumulated snow of an outdoor unit of a refrigerating unit of a refrigerated vehicle and a storage medium.
Background
The refrigerator car is a closed type van transport vehicle for maintaining the temperature of frozen or fresh-keeping goods, is a special refrigerator transport vehicle provided with a refrigerating device of a refrigerating unit and a polyurethane heat insulation compartment, and can be classified according to manufacturers, chassis bearing capacity and carriage types. Refrigerated vehicles are commonly used for transporting frozen foods (freezer vehicles), dairy products (dairy transport vehicles), vegetables and fruits (fresh goods transport vehicles), vaccine drugs (vaccine transport vehicles) and the like.
The refrigerator set of the refrigerator car is used in the environment of the whole country, and the fluctuation of the external environment temperature reaches 45 ℃ to minus 20 ℃. Under the condition that the temperature reaches minus 10 ℃ or even lower, severe weather of snowstorm can exist, and under the condition that the snow is large, the condition that the condensation air duct under the condensation fan cannot clear snow in time and the refrigerating capacity is reduced or the machine is directly shut down under high-pressure protection can exist.
Therefore, at present, an accumulated snow cleaning scheme for an external unit of a refrigerator car refrigerating unit is urgently needed to ensure that the refrigerator car refrigerating unit can normally operate in a low-temperature severe environment.
Disclosure of Invention
Therefore, it is necessary to provide a method, a device, a system and a storage medium for clearing accumulated snow of an external unit of a refrigerator car refrigerating unit, aiming at the technical problem that the refrigerator car refrigerating unit cannot normally work due to accumulated snow coverage in a low-temperature severe environment.
A method for cleaning accumulated snow on an external unit of a refrigerating unit of a refrigerator car comprises the following steps:
acquiring snow cover data of an air outlet of an outdoor unit of a refrigerator car refrigerating unit;
entering a snow clearing mode when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit is identified to meet the preset snow clearing condition;
and waiting for a preset time interval, and returning to the step of acquiring the snow covering data of the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car.
In one embodiment, when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit identifies that the preset snow cleaning condition is met, entering the snow cleaning mode comprises the following steps:
and entering a snow clearing mode when the snow coverage rate reaches a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerating unit of the refrigerator car.
In one embodiment, when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit identifies that the preset snow cleaning condition is met, entering the snow cleaning mode comprises the following steps:
when the snow coverage rate is identified to not reach a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, acquiring the snow increasing speed according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit;
and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
In one embodiment, when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit identifies that the preset snow cleaning condition is met, entering the snow cleaning mode comprises the following steps:
acquiring the snow increasing speed according to the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit;
and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
In one embodiment, the method for removing accumulated snow from an external unit of a refrigeration unit of a refrigerator car further includes:
and when the snow cover data of the air outlet of the outdoor unit of the refrigerator car is identified to not meet the preset snow clearing condition, the normal refrigeration mode is kept.
In one embodiment, the step of acquiring the snow cover data of the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car comprises the following steps:
the snow cover data of the air outlet of the refrigerating unit outer machine of the refrigerator car are acquired in a preset mode, the preset mode comprises at least one of image recognition, sound wave recognition, pressure recognition and infrared recognition based on a snow emitter-receiver matrix, and the snow emitter-receiver matrix is preset in the air outlet of the refrigerating unit outer machine of the refrigerator car.
In one embodiment, the snow removal mode includes: the rotating speed of a condensation fan in the refrigerator car refrigerating unit is reduced, the condensation pressure of the refrigerator car refrigerating unit is maintained at a preset pressure threshold value, the exhaust temperature of the refrigerator car refrigerating unit is increased, and the air quantity of an evaporation fan in the refrigerator car refrigerating unit is adjusted to maintain the refrigerating capacity of the refrigerator car refrigerating unit.
The utility model provides an outer quick-witted snow cleaning device of refrigerator car refrigerating unit, the device includes:
the data acquisition module is used for acquiring snow cover data of an air outlet of an external unit of the refrigeration unit of the refrigerator car;
the snow clearing module is used for entering a snow clearing mode when snow covering data at an air outlet of an external unit of the refrigerator car refrigerating unit are identified to meet preset snow clearing conditions;
and the circulating module is used for waiting for a preset time interval and controlling the data acquisition module to re-execute the operation of acquiring the snow covering data of the air outlet of the outdoor unit of the refrigerating unit of the refrigerator car.
In addition, the application also provides a system for clearing accumulated snow at the outdoor unit of the refrigerator car refrigerating unit, which comprises an acquisition module and a control module, wherein the acquisition module is arranged at the air outlet of the outdoor unit of the refrigerator car refrigerating unit, the control module is loaded with a computer program, the acquisition module acquires accumulated snow covering data at the air outlet of the outdoor unit of the refrigerator car refrigerating unit and sends the data to the control module, and the control module realizes the steps of the method when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring snow cover data of an air outlet of an outdoor unit of a refrigerator car refrigerating unit;
entering a snow clearing mode when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit is identified to meet the preset snow clearing condition;
and waiting for a preset time interval, and returning to the step of acquiring the snow covering data of the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car.
According to the snow cleaning method, the snow cleaning device, the snow cleaning system and the storage medium for the outdoor unit of the refrigerator car refrigerating unit, whether snow needs to be cleaned is judged by detecting the snow coverage condition of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, snow cleaning operation is immediately carried out when snow needs to be cleaned, and snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit are obtained again at certain intervals so as to keep updating and understanding of the snow coverage condition of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, and the influence on the energy consumption of the whole machine caused by the fact that the outdoor unit is in a snow cleaning mode for a long time can be avoided while snow cleaning can be ensured.
Drawings
FIG. 1 is a diagram of an exemplary environment in which a method for cleaning snow accumulated on an external machine of a refrigeration unit of a refrigerated vehicle may be used;
FIG. 2 is a schematic flow chart illustrating a method for removing accumulated snow from an external unit of a refrigeration unit of a refrigerator car according to an embodiment;
FIG. 3 is a schematic flow chart illustrating a method for removing accumulated snow from an external unit of a refrigeration unit of a refrigerator car according to another embodiment;
FIG. 4 is a schematic view of an example of an arrangement of a snow emitter and receiver at an air outlet of an outdoor unit of a refrigeration unit of a refrigerator car;
FIG. 5 is a schematic view of a snow removal mode process flow;
FIG. 6 is a schematic view of the refrigeration unit of the refrigerator car;
FIG. 7 is a schematic flow chart of a method for removing accumulated snow from an external unit of a refrigerator car unit according to an exemplary embodiment;
fig. 8 is a schematic structural diagram of an accumulated snow cleaning device of an external unit of a refrigerating unit of a refrigerator car in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The method for cleaning accumulated snow of the refrigerating unit outer machine of the refrigerator car can be applied to the application environment shown in fig. 1. Fig. 1 shows a roof portion of a split roof refrigerator car, in which an external unit of a refrigerator unit is exposed to the outside of a vehicle compartment. Generally, the overhead refrigerating unit is upward-air-out because of structural characteristics, and the upward-air-out refrigerating unit has a pain point problem in the industry, namely, in severe wind and snow weather, snow can be accumulated in an upper air duct cavity from an upper fan gap. During normal operation, the temperature of the condenser is about 30 to 40 ℃, a small amount of snow can be dissolved in time, but when the snow is large, or the operation is stopped and the machine is started again, much snow can be generated, and the operation is influenced. The adverse effects that can result are several: too much snow causes the blower to block the rotation; snow can affect the heat exchange of the condenser, so that the performance is insufficient; snow is melted and is frozen into ice which is accumulated all the time, and finally fan blades are damaged and even separated.
In view of the above situation, in one embodiment, as shown in fig. 2, the present application provides a method for removing accumulated snow from an external unit of a refrigerator car, including the following steps:
s200: and acquiring snow cover data of an air outlet of an outdoor unit of the refrigerating unit of the refrigerator car.
As shown in fig. 1, the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car is generally directly exposed to the natural environment, snow is easily produced at the air outlet of the outdoor unit of the refrigeration unit of the overhead refrigerator car, and the normal operation of the whole refrigeration unit is affected after the snow is covered by the snow, so that the snow needs to be removed in a targeted manner. Herein, snow cover data of an air outlet of an outdoor unit of the refrigeration unit of the refrigerated vehicle is obtained, and the snow cover data can be specifically snow cover degree and/or snow increase speed. Specifically, the snow cover degree is embodied by the snow cover rate, when the snow cover rate is obtained, the snow cover area is obtained firstly, the ratio of the snow cover area to the whole air outlet area is calculated, and the snow cover rate is obtained. In acquiring the snow increase speed, the snow coverage area increase amount or the snow coverage increase amount may be acquired for an adjacent detection time (e.g., 1 minute, 30 seconds, etc.).
Particularly, the snow cover data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit can be acquired in a sensing detection mode, the snow cover condition of the air outlet of the outdoor unit of the refrigerator car refrigerating unit can be detected in at least one mode or multiple modes of infrared rays, sound waves and pressure in the sensing detection mode, and the snow cover condition of the air outlet of the outdoor unit of the refrigerator car refrigerating unit can be detected in an image recognition mode. In practical application, the image data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit can be shot, the image data is matched and compared with the image data corresponding to different snow cover data, the most similar image is selected, and then the snow cover condition of the air outlet of the outdoor unit of the refrigerator car refrigerating unit is detected in an image recognition mode. In addition, the snow cover condition of the air outlet of the refrigerating unit outer unit of the refrigerator car can be determined by comparing the images of the air outlet of the refrigerating unit outer unit of the refrigerator car at two adjacent moments and the images of the air outlet of the refrigerating unit outer unit of the refrigerator car in a snow cover-free state in a real-time refreshing mode. The detection modes of the sound waves and the pressure are similar, the corresponding relation between different snow cover conditions and the sound waves/the pressure can be specifically constructed through historical data or test data, when actual detection is obtained, a current detection signal is obtained based on the sound wave/pressure detection mode, and then the snow cover conditions are obtained through conversion based on the detection signal and the constructed corresponding relation between the different snow cover conditions and the sound waves/the pressure. Optionally, when the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit needs to be acquired with high precision, the snow coverage data can be acquired by detecting in a combination of the above modes.
S400: and entering a snow clearing mode when the snow covering data of the air outlet snow cover of the outdoor unit of the refrigerator car refrigerating unit is identified to meet the preset snow clearing condition.
The preset snow removal condition is a condition that is preset to satisfy the requirement of executing cleaning operation. Specifically, when the snow cover is severe, the snow cleaning mode needs to be entered, that is, the preset snow cleaning condition is used as a basis for judging whether the snow cover is severe, and can be embodied by two dimensions, namely, the snow cover rate and/or the snow increase speed, that is, the preset snow cleaning condition includes reaching a preset snow cover rate threshold and/or reaching a snow increase speed threshold.
S600: and waiting for a preset time interval and returning to the step S200.
After entering the snow removal mode, the refrigerator car refrigerating unit needs to be adjusted in running state, so that energy consumption can be generated, if the refrigerator car refrigerating unit is in the snow removal mode for a long time, the energy consumption of the whole refrigerator car refrigerating unit is inevitably increased, and on the other hand, the normal work of the refrigerator car refrigerating unit can be influenced, and the reliability of the refrigerator car refrigerating unit is influenced. The preset time interval can be set according to the actual situation, and can not be too long, which can cause the influence on the energy consumption and the reliability of the whole machine; the accumulated snow cannot be cleaned up because false information in a short time cannot be judged too short, an optimal value can be selected in an experimental verification mode, and a general preset time interval can be 2 seconds.
According to the snow clearing method for the outdoor unit of the refrigerator car refrigerating unit, whether snow needs to be cleared is judged by detecting the snow covering condition of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, snow clearing operation is immediately carried out when snow needs to be cleared, meanwhile, the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit are obtained again at certain intervals, so that the snow covering condition of the air outlet of the outdoor unit of the refrigerator car refrigerating unit is kept updated and known, and the situation that the snow is cleared and the overall energy consumption is influenced due to the fact that the outdoor unit of the refrigerator car refrigerating unit is in a snow clearing mode for a long time can be avoided while the snow is cleared.
In one embodiment, when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit identifies that the preset snow cleaning condition is met, entering the snow cleaning mode comprises the following steps:
and entering a snow clearing mode when the snow coverage rate reaches a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerating unit of the refrigerator car.
As described above, the snow coverage rate is the snow coverage area/the area of the air outlet of the refrigerator car unit outdoor unit, the snow coverage area S1 at the air outlet of the refrigerator car unit outdoor unit is obtained by sensing and identifying, the factory parameters of the refrigerator car unit are read to obtain the area S2 of the air outlet, and the ratio of S1 to S2 is calculated to obtain the snow coverage rate n. The preset coverage rate threshold value can be used for measuring and calculating the influence condition of the snow coverage rate on the refrigerating unit of the refrigerator car through experiments and theories, and analyzing the influence condition to be preset. Optionally, the preset coverage threshold may be 60%, that is, when the snow coverage reaches 60%, entering a snow clearing mode to clear snow covered on an air outlet of an external unit of the refrigerator car unit, so as to ensure that the refrigerator car unit operates normally.
As shown in fig. 3, in one embodiment, S400 includes:
s420: when the snow coverage rate is identified to not reach a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, acquiring the snow increasing speed according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit;
s440: and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
If it is discerned that the snow cover rate does not reach when predetermineeing the coverage threshold value, probably just form snow at the air outlet this moment, for avoiding snow increase speed too fast and lead to forming a large amount of snow in the short time, consequently need further acquisition snow increase speed, when snow increase speed reaches predetermineeing snow increase speed threshold value, then indicate that current snow increase speed is very fast, if not clear up in time and probably appear that snow can't clear up completely in the too much short time. For the situation, when the snow increase speed reaches the preset snow increase speed threshold, the snow cleaning mode is also entered, and the snow at the air inlet is immediately cleaned. Similar to the preset coverage rate threshold value, the preset snow increase speed threshold value is a preset value and is used for judging whether the snow increase speed is too fast or not, so that the snow cannot be cleaned in time in a short time, and the snow increase speed threshold value can be obtained through experimental analysis. Optionally, it may be specifically configured that the speed is 5% snow coverage increase/minute, that is, if it is determined that the snow increase speed reaches 5% snow coverage increase per minute, the snow cleaning mode is directly entered.
In one embodiment, when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit identifies that the preset snow cleaning condition is met, entering the snow cleaning mode comprises the following steps:
acquiring the snow increasing speed according to the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit; and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
In the present embodiment, the snow-accumulation increasing speed is directly used as the preset snow-removing condition, and when the snow-accumulation increasing speed reaches the preset snow-accumulation increasing speed threshold, the snow-removing mode is directly entered. The determination process of the preset snow-increase speed threshold is similar to that in the above embodiment, and is not described in detail here.
In one embodiment, the method for removing accumulated snow from an external unit of a refrigeration unit of a refrigerator car further includes:
and when the snow cover data of the air outlet of the outdoor unit of the refrigerator car is identified to not meet the preset snow clearing condition, the normal refrigeration mode is kept.
If the current condition that the snow clearing condition is not met is identified according to the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, the current refrigerator car refrigerating unit only needs to execute snow clearing operation, namely the refrigerator car refrigerating unit does not need to be switched to the snow clearing working condition, and a normal refrigerating mode can be continuously kept. The condition that the preset snow clearing condition is not met can be specifically that the current snow coverage rate is identified to be not higher than (not higher than) a preset coverage rate threshold value according to snow coverage data of an air outlet of an outdoor unit of the refrigerator car refrigerating unit; or the current accumulated snow increasing speed does not reach a preset accumulated snow increasing speed threshold value; or, the current snow increase speed does not reach the preset coverage threshold and the current snow increase speed does not reach the preset snow increase speed threshold.
Specifically, the above embodiment may include at least three relatively independent schemes for different data dimensions included in the preset snow-clearing condition, and the following description will be developed: 1. the preset snow clearing condition is characterized as an accumulated snow coverage rate threshold, and when the accumulated snow coverage rate of the air outlet of the outdoor unit does not exceed the accumulated snow coverage rate threshold according to the accumulated snow coverage data of the air outlet of the refrigeration unit of the refrigerator car, the normal refrigeration mode is kept; 2. the preset snow clearing condition is characterized by an accumulated snow increasing speed threshold, and when the accumulated snow increasing speed of the air outlet of the outdoor unit does not exceed the accumulated snow increasing speed threshold according to accumulated snow covering data of the air outlet of the refrigeration unit of the refrigerator car, a normal refrigeration mode is kept; 3. the preset snow clearing condition is characterized by two aspects of an accumulated snow coverage rate threshold value or an accumulated snow increasing speed threshold value, and only one aspect condition needs to be met at the moment, namely the preset snow clearing condition is judged to be met, in other words, the preset snow clearing condition is judged not to be met only when the two aspect conditions are not met; specifically, when the snow coverage rate of the air outlet of the current outer unit does not exceed the snow coverage rate threshold value according to the snow coverage data of the air outlet of the outer unit of the refrigerator car refrigerating unit, whether the snow increase speed of the air outlet of the current outer unit exceeds the snow increase speed threshold value or not is further judged, and when the snow increase speed of the air outlet of the current outer unit does not exceed the snow increase speed threshold value, a normal refrigerating mode is kept.
In one embodiment, the step of acquiring the snow cover data of the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car comprises the following steps:
the snow cover data of the air outlet of the refrigerating unit outer machine of the refrigerator car are acquired in a preset mode, the preset mode comprises at least one of image recognition, sound wave recognition, pressure recognition and infrared recognition based on a snow emitter-receiver matrix, and the snow emitter-receiver matrix is preset in the air outlet of the refrigerating unit outer machine of the refrigerator car.
Snow emitter-receiver matrix indicates the matrix of compriseing a plurality of snow emitter-receiver, snow emitter-receiver includes infrared receiver and infrared transmitter, among these a plurality of snow emitter-receiver, infrared receiver adopts the mode that the matrix was arranged to set up in one side of refrigerator car refrigerating unit air outlet, infrared transmitter adopts and corresponds the matrix mode and set up in other air outlet and get the opposite side, infrared transmitter transmission infrared signal, if the air outlet is covered by snow, then can shelter from infrared signal and receive, snow emitter-receiver who successfully receives infrared signal through the statistics can analyze out refrigerator car refrigerating unit outer machine air outlet snow cover data. More specifically, as shown in fig. 4, a matrix of snow emitters and receivers are mounted on the sheet metal parts on both sides of the upper air duct cavity of the refrigeration unit of the refrigerator car, and in principle, the snow emitters and receivers are infrared emitter box receivers, snow emitters are arranged on one side wall of the snow box receivers and are used for emitting infrared rays only, and infrared receivers are arranged on the other side of the snow box receivers and are used for receiving signals transmitted from the infrared emitters. If snow is accumulated in the upper air duct cavity of the refrigerating unit due to the situation, the accumulated snow can be partially shielded, and partial infrared rays cannot be received. Because the snow cover emitting and receiving devices are arranged in a matrix, the snow cover data of the air outlet of the refrigerating unit outdoor unit of the refrigerator car can be obtained according to the collected signal analysis.
In one embodiment, the snow removal mode includes: the rotating speed of a condensation fan in the refrigerator car refrigerating unit is reduced, the condensation pressure of the refrigerator car refrigerating unit is maintained at a preset pressure threshold value, the exhaust temperature of the refrigerator car refrigerating unit is increased, and the air quantity of an evaporation fan in the refrigerator car refrigerating unit is adjusted to maintain the refrigerating capacity of the refrigerator car refrigerating unit.
The preset pressure threshold is a preset condensing pressure of the refrigerant, and can be preset according to the use condition of the outdoor unit and the performance of the compressor. Generally it is 3.1 MPa. Specifically, the snow cleaning mode is as shown in fig. 5, after the mode enters, the rotating speed of the condensing fan is adjusted by detecting the condensing pressure of the whole machine and reducing the rotating speed of the condensing fan, so that the condensing pressure is increased to be close to 3.1 MPa. The melting of the accumulated snow can be accelerated by increasing the condensation temperature. When the fan is adjusted, the step number of the electronic expansion valve is also reduced, the high-low pressure difference is increased, the exhaust temperature of the whole machine is increased, and the snow removing speed is accelerated. Meanwhile, the electronic expansion valve can change the refrigerating capacity, and in order to prevent the refrigerating capacity from changing and influencing the temperature of the box body, the air quantity of the evaporation fan can be synchronously adjusted to adjust the working condition of the evaporator, so that the refrigerating capacity cannot change.
To further explain the snow removal mode in detail, the following description is provided with reference to fig. 6, which is a schematic view of the operation of the refrigeration unit of the refrigerator car. After gathering and reaching the entering condition, the first action is that the condensation fan stall, and the fan stops to come the snow removal principle and is, after the condensation fan stall, condensation pressure can rise, and then the condenser temperature can rise, can clear away the snow in last wind channel chamber. However, the condensing pressure cannot be increased without limitation, in the design of the refrigerating unit, in order to keep the compressor in a reasonable working condition all the time, a system high-pressure protection value of 3.2MPa is set, in the snow clearing mode, the condensing pressure cannot be increased all the time in order to clear snow, and the maximum temperature of the condensing side of the system is approximately kept. At this time, the temperature of the condensation side is increased to some extent, and the temperature of the high-pressure side is increased to a higher level to accelerate snow removal, approximately 60 ℃ under standard conditions. Additional adjustments are added to the system control. And when the rotating speed of the fan is controlled to be reduced, the step number of the electronic expansion valve is adjusted by the controller to be reduced, and a proper value is determined, and the value can be set and adjusted through the actual unit condition. After the number of steps of the electronic expansion valve is reduced, the pressure difference of the compressor is increased, the corresponding exhaust pressure is also increased, snow removal is accelerated, and the front temperature of the shunt circuit of the condenser can reach about 100 ℃. Since the mass flow of the entire system is reduced after the expansion valve is adjusted, the cooling capacity of the entire system is increased or decreased according to actual conditions. In order to ensure the stability of the working condition in the box in the snow cleaning mode, the temperature of the inner ring needs to be adjusted to be unchanged. The system refrigerating capacity is adjusted by calculating and adjusting the air quantity of the evaporation fan, the refrigerating capacity of the indoor unit can be kept only by calculating the air quantity change of the evaporator part along with the collected temperature, and the air quantity of the evaporation fan is adjusted by performing signal feedback, so that the working condition of the whole indoor unit is unchanged.
Specifically, the step number setting of the electronic expansion valve is determined by an optimal adjustment process, which specifically includes: the actual using step interval of the electronic expansion valve is 0-B, the initial value is firstly determined to be B/2, and then the adjustment is carried out every 5S. If the detected condensing pressure is less than the set value of 3.2Mpa, the step number is adjusted to be 1/2 at present; also, above the set, the number of steps is expanded 1/2 until the pressure stabilizes within the error range.
In order to further explain the technical scheme of snow cleaning for the refrigerating unit of the refrigerator car and the effects thereof in detail, specific examples are adopted for the following description. In this particular example of application, the preset threshold of coverage is 60% and the preset threshold of snow increase speed is set to 5%/minute.
In the working condition of starting to run snow, snow can be deposited in the upper air duct cavity as shown in fig. 1, and the accumulated snow in the upper air duct cavity can cause that part of the infrared receivers cannot receive signals. The area of the snow cover at present is approximately simulated according to the transmitted signals, and whether the area of the snow cover reaches 60% of the whole area is judged according to a given rule. When the set value is reached, the unit enters a snow cleaning mode. After entering the snow cleaning mode, in order to avoid the influence of the snow cleaning mode on the energy consumption and reliability of the whole machine, a special mode is released as soon as possible, and the whole machine performs feedback inspection once every two minutes. The feedback checking principle is that the collected signal of the snow cover transmitting and receiving device is analyzed again at a specific time, and if the signal reaches an exit value, the snow cover transmitting and receiving device immediately exits. There is a special case where snow is rapidly added in the upper duct cavity in a short time in a snowy weather, and at this time, information is collected by the snow emitter-receiver and further analysis is performed. After the analysis, the given specified value is compared, and when the specified value is reached, the snow cleaning mode is entered. This condition is to prevent the snow-removing operation from being performed when the speed of snow accumulation is too high and the total area is less than 60%. Otherwise it is not time to clear the snow when 60% of the total upper duct chamber is reached.
In summary, as shown in fig. 7, in the above application example, the method for removing accumulated snow from the outdoor unit of the refrigerator car refrigerating unit includes the following steps:
1. judging that the vehicle is in a snowing working condition at present;
2. the snow cover transmitter-receiver detects the snow cover condition;
3. if the coverage rate of the accumulated snow does not reach 60 percent of the whole area, entering the step 5;
4. if the coverage rate of the accumulated snow reaches 60% of the whole area, entering a step 7;
5. judging whether the accumulated snow increasing speed is less than a set value or not;
6. if the accumulated snow increase speed is less than the set value, entering a normal refrigeration mode, and if the accumulated snow increase speed is greater than the set value, entering a step 7;
7. entering a snow clearing mode;
8. the feedback check is performed every two minutes.
It should be understood that, although the steps in the flowcharts are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in each of the flowcharts described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
As shown in fig. 8, this application still provides an outer quick-witted snow cleaning device of refrigerator car refrigerating unit, and the device includes:
the data acquisition module 200 is used for acquiring snow cover data of an air outlet of an outdoor unit of the refrigeration unit of the refrigerator car;
the snow cleaning module 400 is used for entering a snow cleaning mode when the snow covering data of the air outlet of the refrigeration unit outer machine of the refrigerator car is identified to meet the preset snow cleaning condition;
and the circulation module 600 is used for waiting for a preset time interval and controlling the data acquisition module to re-execute the operation of acquiring the accumulated snow coverage data of the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car.
Above-mentioned outer quick-witted snow cleaning device of refrigerator car refrigerating unit, judge whether need clear snow through detecting the outer quick-witted air outlet snow cover condition of refrigerator car refrigerating unit, clear snow the operation immediately when needs clear snow, the outer quick-witted air outlet snow cover data of refrigerator car refrigerating unit is acquireed once more at certain time interval simultaneously, in order to keep knowing the outer quick-witted air outlet snow cover condition update of refrigerator car refrigerating unit, can also avoid being in clear snow mode for a long time and influence the complete machine energy consumption when can guaranteeing the snow clearance.
In one embodiment, the snow removing module 400 is further configured to enter the snow removing mode when the snow coverage reaches the preset coverage threshold according to the snow coverage data at the air outlet of the refrigeration unit of the refrigerator car.
In one embodiment, the snow removing module 400 is further configured to obtain an accumulated snow increasing speed according to the accumulated snow coverage data of the air outlet of the refrigeration unit of the refrigerator car when it is identified that the accumulated snow coverage rate does not reach a preset coverage rate threshold according to the accumulated snow coverage data of the air outlet of the refrigeration unit of the refrigerator car; and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
In one embodiment, the snow removing module 400 is further configured to obtain a snow increase speed according to snow coverage data at an air outlet of an outdoor unit of the refrigerator car; and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
In one embodiment, the snow removing device for the external unit of the refrigerator car refrigerating unit further comprises:
and the refrigeration keeping module is used for keeping a normal refrigeration mode when the snow cover data of the air outlet of the refrigerating unit outer machine of the refrigerator car is identified to be not satisfied with a preset snow clearing condition.
In one embodiment, the data obtaining module 200 is further configured to obtain snow coverage data of an air outlet of an external unit of the refrigerator car refrigerating unit in a preset manner, where the preset manner includes at least one of image recognition, sound wave recognition, pressure recognition and infrared recognition based on an snow emitter-receiver matrix, and the snow emitter-receiver matrix is preset at the air outlet of the external unit of the refrigerator car refrigerating unit.
In one embodiment, the snow removal mode includes: the rotating speed of a condensation fan in the refrigerator car refrigerating unit is reduced, the condensation pressure of the refrigerator car refrigerating unit is maintained at a preset pressure threshold value, the exhaust temperature of the refrigerator car refrigerating unit is increased, and the air quantity of an evaporation fan in the refrigerator car refrigerating unit is adjusted to maintain the refrigerating capacity of the refrigerator car refrigerating unit.
For a specific embodiment of the snow removing device for the outdoor unit of the refrigeration unit of the refrigerator car, reference may be made to the above embodiment of the snow removing method for the outdoor unit of the refrigeration unit of the refrigerator car, and details are not described herein again. All modules in the snow cleaning device outside the refrigerating unit of the refrigerator car can be completely or partially realized through software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In addition, the application also provides a system for clearing accumulated snow at the outdoor unit of the refrigerator car refrigerating unit, which comprises an acquisition module and a control module, wherein the acquisition module is arranged at the air outlet of the outdoor unit of the refrigerator car refrigerating unit, the control module is loaded with a computer program, the acquisition module acquires accumulated snow covering data at the air outlet of the outdoor unit of the refrigerator car refrigerating unit and sends the data to the control module, and the control module realizes the steps of the method when executing the computer program.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring snow cover data of an air outlet of an outdoor unit of a refrigerator car refrigerating unit;
entering a snow clearing mode when the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit is identified to meet the preset snow clearing condition;
and waiting for a preset time interval, and returning to the step of acquiring the snow covering data of the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and entering a snow clearing mode when the snow coverage rate reaches a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerating unit of the refrigerator car.
In one embodiment, the computer program when executed by the processor further performs the steps of:
when the snow coverage rate is identified to not reach a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, acquiring the snow increasing speed according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit;
and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring the snow increasing speed according to the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit; and entering a snow cleaning mode when the snow increase speed reaches a preset snow increase speed threshold.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and when the snow cover data of the air outlet of the outdoor unit of the refrigerator car is identified to not meet the preset snow clearing condition, the normal refrigeration mode is kept.
In one embodiment, the computer program when executed by the processor further performs the steps of:
the snow cover data of the air outlet of the refrigerating unit outer machine of the refrigerator car are acquired in a preset mode, the preset mode comprises at least one of image recognition, sound wave recognition, pressure recognition and infrared recognition based on a snow emitter-receiver matrix, and the snow emitter-receiver matrix is preset in the air outlet of the refrigerating unit outer machine of the refrigerator car.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for cleaning accumulated snow on an external unit of a refrigerating unit of a refrigerator car is characterized by comprising the following steps:
acquiring snow cover data of an air outlet of an outdoor unit of a refrigerator car refrigerating unit;
entering a snow clearing mode when the snow covering data of the air outlet of the refrigerating unit of the refrigerator car meets the preset snow clearing condition;
waiting for a preset time interval, and returning to the step of acquiring the snow covering data of the air outlet of the refrigerating unit of the refrigerator car;
when according to the outer quick-witted air outlet snow cover data recognition of refrigerator car refrigerating unit satisfies when presetting the clear snow condition, get into clear snow mode and include: when the snow coverage rate is identified to not reach a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit, acquiring the snow increasing speed according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit; and entering a snow clearing mode when the snow increase speed reaches a preset snow increase speed threshold.
2. The method of claim 1, wherein entering a snow clearing mode when a predetermined snow clearing condition is met as identified from the outdoor unit air outlet snow cover data comprises:
and entering a snow clearing mode when the snow coverage rate reaches a preset coverage rate threshold value according to the snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit.
3. The method of claim 1, wherein entering a snow clearing mode when a preset snow clearing condition is met as identified from the outdoor unit air outlet snow cover data comprises:
acquiring the snow increasing speed according to the snow covering data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit;
and entering a snow clearing mode when the snow increase speed reaches a preset snow increase speed threshold.
4. The method of claim 1, further comprising:
and when the snow cover data of the air outlet of the refrigerating unit of the refrigerator car does not meet the preset snow clearing condition, the normal refrigerating mode is kept.
5. The method of claim 1, wherein the obtaining of the data on snow cover at the air outlet of the outdoor unit of the refrigerator car comprises:
acquire outer quick-witted air outlet snow of refrigerator car refrigerating unit through the mode of predetermineeing and cover data, the mode of predetermineeing includes at least one in image identification, sound wave discernment, pressure discernment and the infrared identification based on the snow transceiver matrix, the snow transceiver matrix predetermine in outer machine air outlet of refrigerator car refrigerating unit.
6. The method of claim 1, wherein the snow removal mode comprises:
the method comprises the steps of reducing the rotating speed of a condensation fan in the refrigerator car refrigerating unit, maintaining the condensation pressure of the refrigerator car refrigerating unit at a preset pressure threshold value, increasing the exhaust temperature of the refrigerator car refrigerating unit, and adjusting the air quantity of an evaporation fan in the refrigerator car refrigerating unit so as to maintain the refrigerating capacity of the refrigerator car refrigerating unit.
7. The utility model provides an outer quick-witted snow cleaning device of refrigerator car refrigerating unit which characterized in that, the device includes:
the data acquisition module is used for acquiring snow cover data of an air outlet of an external unit of the refrigeration unit of the refrigerator car;
the snow clearing module is used for entering a snow clearing mode when the snow covering data of the air outlet of the refrigerating unit outer machine of the refrigerator car is identified to meet a preset snow clearing condition;
the circulating module is used for waiting for a preset time interval and controlling the data acquisition module to re-execute the operation of acquiring the snow coverage data of the air outlet of the outdoor unit of the refrigeration unit of the refrigerator car;
the snow cleaning module is further used for acquiring the snow increasing speed according to the snow covering data of the air outlet of the refrigerator car refrigerating unit when the snow covering rate is identified to be lower than the preset covering rate threshold value according to the snow covering data of the air outlet of the refrigerator car refrigerating unit; and entering a snow clearing mode when the snow increase speed reaches a preset snow increase speed threshold.
8. The device of claim 7, wherein the snow clearing module is further configured to enter a snow clearing mode when the snow coverage reaches a preset coverage threshold as identified from the data of snow coverage at the outdoor unit air outlet of the refrigerator car.
9. The snow cleaning system for the outdoor unit of the refrigerator car refrigerating unit is characterized by comprising an acquisition module and a control module, wherein the acquisition module is arranged at an air outlet of the outdoor unit of the refrigerator car refrigerating unit, the control module is loaded with a computer program, the acquisition module acquires snow coverage data of the air outlet of the outdoor unit of the refrigerator car refrigerating unit and sends the data to the control module, and the control module realizes the steps of the method according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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