Mine air conditioning control method, mine air conditioning system and computer readable storage medium

Abstract

The application discloses a kind of mine air conditioner control method, mine air conditioner system and computer readable storage medium, method includes steps: the amount of fresh air entering roadway and fresh air temperature are obtained;According to the amount of fresh air and the preset range of fresh air temperature adjustment refrigeration host opening quantity adjustment load, according to the target deviation of the amount of fresh air and preset fresh air amount adjustment water pump and compressor operating frequency of the air conditioning system.The application utilizes coal face fresh air volume and fresh air temperature, intelligently adjusts the operating quantity of refrigeration host and refrigerated water pump, spray water pump, cooling water pump frequency, to control the air supply temperature of coal face, and achieve cost saving and improve the energy efficiency and reliability of environmental control system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a mine air conditioner control method, a mine air conditioner system and a computer readable storage medium. BACKGROUND

[0002] With the increase of mining depth, mine heat damage is increasingly prominent, which seriously affects the health of underground workers and the safety of coal mine production. High temperature heat damage has become a bottleneck restricting efficient mining of coal mines. There are many mine cooling equipment and technologies at present, but there are problems such as high investment in centralized cooling equipment, low efficiency and high energy consumption of local cooling equipment, waste of fresh air and underground water, and high water temperature stopping operation. In the prior art, a multi-combination cabinet air mixing system is used. Because explosion-proof is required underground, various detection devices need to be explosion-proof. The required fresh air volume of the coal mining face changes with different fresh air temperatures and mining degrees, and the existing unit adjustment lags behind or cannot adjust according to changes. SUMMARY

[0003] The present application proposes a mine air conditioner control method, a mine air conditioner system and a computer readable storage medium to solve the technical problem that the existing mine refrigeration unit cannot adjust according to the actual fresh air condition.

[0004] The technical solution adopted by the present application is:

[0005] The present application proposes a mine air conditioner control method, which includes the following steps:

[0006] Obtaining the fresh air volume and fresh air temperature entering the roadway;

[0007] Adjusting the number of refrigeration host units opened according to the corresponding preset ranges of the fresh air volume and fresh air temperature, and adjusting the load of the air conditioning system.

[0008] Further, it further includes the step of adjusting the operating frequency of each water pump and compressor in the air conditioning system according to the target deviation of the fresh air volume from the preset fresh air volume.

[0009] Specifically, obtaining the fresh air volume entering the roadway includes the following steps: collecting the average wind speed V detected by the multiple wind speed instruments evenly arranged in the roadway, and obtaining the fresh air volume Q calculated by the average wind speed V and the cross-sectional area S of the roadway, Q=S*V.

[0010] Further, the smaller the fresh air volume, the fewer the refrigeration host units opened. The larger the fresh air volume, the higher the fresh air temperature, and the more the refrigeration host units opened.

[0011] Further, the preset range of the fresh air volume and the fresh air temperature specifically comprises: taking two temperature points to divide three fresh air temperature ranges with sequentially increasing temperatures, which are a first fresh air temperature range, a second fresh air temperature range and a third fresh air temperature range; and taking two air volume points to divide three fresh air volume ranges with sequentially increasing air volumes, which are a first fresh air volume range, a second fresh air volume range and a third fresh air volume range.

[0012] Further, adjusting the opening number of the refrigeration host to control the air supply temperature of the coal mining face according to the preset range of the fresh air volume and the fresh air temperature specifically comprises:

[0013] when the fresh air temperature is in the first temperature range or the second temperature range or the third temperature range, and the fresh air volume is in the first fresh air volume range, one water-cooled unit is started;

[0014] when the fresh air temperature is in the first temperature range or the second temperature range or the third temperature range, and the fresh air volume is in the second fresh air volume range, two water-cooled units are started;

[0015] when the fresh air temperature is in the first temperature range or the second temperature range, and the fresh air volume is in the third fresh air volume range, two water-cooled units are started;

[0016] when the fresh air temperature is in the third temperature range, and the fresh air volume is in the third fresh air volume range, three water-cooled units are started.

[0017] Further, adjusting the running frequency of the water pump and the compressor of the air conditioning system according to the target deviation of the fresh air volume and the preset fresh air volume specifically comprises:

[0018] calculating a climbing and unloading value DC, DC=|δ-100| / 1000, δ being a target deviation obtained by subtracting the preset fresh air volume from the fresh air volume; and calculating an adjusted total frequency DB, DB=Sfh×DC, Sfh being a preset step size;

[0019] when the target deviation is greater than a first preset deviation, increasing the current frequency of the water pump and the compressor of the air conditioning system by the calculated adjusted total frequency DB;

[0020] when the target deviation is less than or equal to a second preset deviation, decreasing the current frequency of the water pump and the compressor of the air conditioning system by the calculated adjusted total frequency DB;

[0021] when the target deviation is less than or equal to the first preset deviation and greater than the second preset deviation, keeping the frequency of the water pump and the compressor of the air conditioning system at the current frequency.

[0022] The application further provides a mine air conditioning system, which uses the above control method to adjust the load of the air conditioning system.

[0023] The application further provides a computer readable storage medium for storing a computer program, which performs the mine air conditioning system control method when running.

[0024] Compared with the prior art, the application uses the fresh air volume and fresh air temperature of the coal mining face to intelligently adjust the running number of the refrigeration host and the frequency of the chilled water pump, the spray water pump and the cooling water pump, so as to control the air supply temperature of the coal mining face and save cost and improve the energy efficiency and reliability of the environmental control system. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0026] Figure 1 The figure is a structural schematic diagram of the embodiment of the application.

[0027] Figure 2 The figure is a flowchart of the embodiment of the application.

[0028] Figure 3 The figure is a flowchart of the specific embodiment of the application.

[0029] Figure 4 The figure is a flowchart of the specific embodiment of the application.

[0030] 1, chilled water pump;

[0031] 2, combination cabinet;

[0032] 3, refrigeration host;

[0033] 4, cooling water pump;

[0034] 5, spray water pump;

[0035] 6, closed cooling tower. DETAILED DESCRIPTION

[0036] In order to make the technical problems to be solved by the application, the technical solutions and the beneficial effects more clearly, the following will further describe the application in combination with the drawings and the embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.

[0037] The principles and structures of the application will be described in detail in combination with the drawings and the embodiments.

[0038] The prior art adopts a multi-combination cabinet air mixing system. Because explosion-proof is required underground, various detection devices need to be explosion-proof. The fresh air volume required by the coal mining face is constantly changing with different fresh air temperatures and mining degrees. The existing unit adjustment lags behind or cannot adjust according to changes. For example, patent application CN116220785A mine air conditioning unit and control method thereof, the temperature parameters of the fresh air temperature and the mine air conditioning unit are detected; wherein the temperature parameters at least include the outlet air temperature and the condensation temperature; the number of open units of the refrigeration host and the cooling tower is determined according to the fresh air temperature and the temperature parameter, and the operation of the refrigeration host and the cooling tower is controlled.

[0039] The number of open units of the refrigeration host and the cooling tower is determined according to the fresh air temperature and the temperature parameter, including: determining the initial number of open units of the refrigeration host and the cooling tower according to the fresh air temperature; after the refrigeration host and the cooling tower operate according to the initial number of open units, determining the final number of open units of the refrigeration host according to the outlet air temperature and the power parameter of the refrigeration host, and determining the final number of open units of the cooling tower according to the condensation temperature and the power parameter of the cooling tower.

[0040] Optionally, determining the initial number of open units of the refrigeration host and the cooling tower according to the fresh air temperature, including: when the fresh air temperature is greater than a first preset temperature, the initial number of open units is n1; when the fresh air temperature is greater than a second preset temperature and less than or equal to the first preset temperature, the initial number of open units is n2; when the fresh air temperature is less than the second preset temperature, the initial number of open units is n3; wherein n4≤n3

[0041] Determine the final number of open units of the refrigeration host according to the outlet air temperature and the power parameter of the refrigeration host, including: when the outlet air temperature reaches a preset condition, detect the initial running power of the refrigeration host; control to close a preset number of refrigeration hosts, the current number of open units of the refrigeration host is the adjusted number of open units; re-detect the outlet air temperature, when the outlet air temperature reaches the preset condition, detect the current running power of the refrigeration host; determine the final number of open units of the refrigeration host according to the initial running power and the current running power. When the initial running power is greater than or equal to the current running power, the final number of open units is determined as the adjusted number of open units; when the initial running power is less than the current running power, the final number of open units is determined as the initial number of open units. That is, the comparison file mainly controls the load of the refrigeration host by detecting the outlet air temperature. This way of detection has high cost, and cannot change according to the actual changes in the mining process of the coal mining face.

[0042] To this end, the present application provides a mine air conditioning control method, specifically by detecting the amount of fresh air entering the roadway and the fresh air temperature, to adjust the number of refrigeration host opening, to control the air supply temperature of the coal mining face, the amount of fresh air of the mine working face will change with the personnel working intensity and the season or the wind temperature, so the unit can control the frequency operation of the refrigeration host and the water pump according to the air volume, which can be more in line with the actual operation.

[0043] The mine air conditioning control method provided by the present application is specifically used for a mine air conditioning system, as shown in the figure, Figure 1 The mine air conditioning system comprises a combination cabinet 2, a refrigeration host 3 and a plurality of closed cooling towers 6, a spray water pump 5, a cooling water pump 4 and a chilled water pump 1.

[0044] The fresh air into the coal mining face is sent by a negative pressure mode, that is, the entire roadway is under negative pressure; the refrigeration host 3 is arranged in series in the fresh air roadway, and chilled water is prepared, and the chilled water is connected to the combination cabinet 2; each combination cabinet 2 exchanges heat with fresh air, adopts a mixed air cooling and dehumidification mode, and sends the fresh air into the coal mining face (the back mining area in the figure) after cooling and dehumidification; the exhaust air generated after the coal mining face exchanges heat with the closed cooling tower 6, and carries away the heat load of the mine.

[0045] The combination cabinet 2 is a water-driven type, and the air volume handled by a single combination cabinet can be adjusted by water flow; when the load is reduced, the chilled water pump needs to be adjusted, so that the air volume handled by a single combination cabinet is reduced, and the overall machine efficiency is optimal.

[0046] The closed cooling tower 6 is also a water-driven type, and when the load is reduced, the water pump frequency can be adjusted to reduce the water pump power consumption, thereby increasing the overall machine efficiency.

[0047] As shown in the figure, Figure 2 Specifically, the mine air conditioning control method specifically comprises the following steps:

[0048] Obtain the amount of fresh air entering the roadway and the fresh air temperature;

[0049] Adjust the number of refrigeration host opening according to the preset range of the amount of fresh air and the fresh air temperature to adjust the load of the air conditioning system, thereby controlling the air supply temperature of the coal mining face; and adjust the running frequency of each water pump and compressor in the air conditioning system according to the target deviation of the amount of fresh air from the preset amount of fresh air.

[0050] By directly obtaining the amount of fresh air and the fresh air temperature of the fresh air section of the roadway, the frequency of the compressor, the chilled water pump, the spray water pump and the cooling water pump in the refrigeration host is intelligently adjusted, so as to control the air supply temperature of the coal mining face, and the cost is saved and the energy efficiency and reliability of the environmental control system are improved.

[0051] In a specific embodiment, obtaining the amount of fresh air of the roadway specifically comprises the following steps:

[0052] Collect the wind speed detected by the multiple wind speed instruments evenly arranged in the roadway, calculate the average wind speed V, and obtain the fresh air quantity Q calculated by the average wind speed V and the cross-sectional area S of the roadway, i.e. Q=S*V.

[0053] In specific embodiments, adjusting the number of open refrigeration hosts according to the fresh air quantity and the preset range of the fresh air temperature is specifically: the smaller the fresh air quantity, the fewer the number of open refrigeration hosts; the larger the fresh air quantity, the higher the fresh air temperature, and the more the number of open refrigeration hosts.

[0054] That is, when the fresh air quantity is small, opening too many refrigeration hosts will cause insufficient heat exchange, resulting in waste of cold energy and affecting the overall energy consumption. The larger the fresh air quantity and the higher the fresh air temperature, the more the number of refrigeration hosts that need to be opened, because when the fresh air quantity is large and the fresh air temperature is high, more refrigeration hosts are needed to cool the fresh air, and at the same time, it indicates that the working strength of the coal mining face is large, so that the number of units matches the actual working condition.

[0055] In specific embodiments, the preset range of the fresh air quantity and the fresh air temperature specifically includes:

[0056] Two temperature points are taken to divide three fresh air temperature ranges corresponding to the increasing temperature in turn, which are the first fresh air temperature range, the second fresh air temperature range and the third fresh air temperature range;

[0057] Two air quantity points are taken to divide three fresh air quantity ranges corresponding to the increasing air quantity in turn, which are the first fresh air quantity range, the second fresh air quantity range and the third fresh air quantity range.

[0058] Adjusting the number of open refrigeration hosts according to the fresh air quantity and the preset range of the fresh air temperature to control the air supply temperature of the coal mining face specifically includes:

[0059] When the fresh air temperature is in the first temperature range or the second temperature range or the third temperature range, and the fresh air quantity is in the first fresh air quantity range, one water-cooled unit is opened;

[0060] When the fresh air temperature is in the first temperature range or the second temperature range or the third temperature range, and the fresh air quantity is in the second fresh air quantity range, two water-cooled units are opened;

[0061] When the fresh air temperature is in the first temperature range or the second temperature range, and the fresh air quantity is in the third fresh air quantity range, two water-cooled units are opened;

[0062] When the fresh air temperature is in the third temperature range, and the fresh air quantity is in the third fresh air quantity range, three water-cooled units are opened.

[0063] For example, Figure 4As shown, specifically, T is the fresh air temperature, Q is the fresh air volume; q1 and q2, and t1 and t2 are preset values; the unit of air volume is m³. 3 / min

[0064] First fresh air temperature range: T < t2; Second fresh air temperature range: t2 ≤ T ≤ t1; Third fresh air temperature range: T > t1.

[0065] First fresh air volume range: q1 > Q, second fresh air volume range: q1 ≤ Q ≤ q2, third fresh air volume range: Q > q2.

[0066] When t2≤T≤t1 and q1≤Q≤q2, turn on 2 cooling units;

[0067] When t2≤T≤t1 and Q<q1, turn on one refrigeration unit;

[0068] When t2≤T≤t1 and Q>q2, turn on 2 cooling units;

[0069] When T>t1 and q1≤Q≤q2, turn on 2 cooling units;

[0070] When T > t1 and Q > q2, turn on 3 cooling units;

[0071] When T > t1 and Q < q1, turn on one refrigeration unit;

[0072] When T>t1 and q1≤Q≤q2, turn on 2 cooling units;

[0073] When T < t2 and Q > q2, turn on 2 cooling units;

[0074] When T < t2 and Q < q1, turn on one refrigeration unit;

[0075] When T < t2, and q1 ≤ Q ≤ q2, turn on 2 refrigeration units;

[0076] After determining the number of refrigeration units to be started initially, the frequency of the refrigeration units is adjusted according to the actual fresh air volume of the coal face. Each unit, spray water pump, cooling water pump, and chilled water pump first runs at the initial frequency, and then the load frequency is controlled according to the fresh air volume of the roadway.

[0077] like Figure 3 As shown, adjusting the operating frequency of the air conditioning system's water pump and compressor based on the target deviation between the fresh air volume and the preset fresh air volume specifically includes:

[0078] Calculate the ramp loading and unloading value DC, DC=|δ-100| / 1000, where δ is the target deviation obtained by subtracting the preset fresh air volume from the fresh air volume; calculate the total adjustment frequency DB, DB=Sfh×DC, where Sfh is the preset step size;

[0079] When the target deviation is greater than the first preset deviation, the current frequency of the water pump and the compressor of the air conditioning system is increased by the calculated adjustment total frequency DB;

[0080] When the target deviation is less than or equal to the second preset deviation, the current frequency of the water pump and the compressor of the air conditioning system is decreased by the calculated adjustment total frequency DB;

[0081] When the target deviation is less than or equal to the first preset deviation and greater than the second preset deviation, the water pump and the compressor frequency of the air conditioning system is kept at the current frequency.

[0082] In a specific embodiment, the climbing load and unload value DC = | target deviation - 100 | / 1000

[0083] The adjustment total frequency DB = Sfh x DC.

[0084] When 0 < DB ≤ 1 Hz, the adjustment total frequency DB = 1 Hz;

[0085] When DB ≥ 3 Hz, the adjustment total frequency DB = 3 Hz, and the rest is rounded to an integer.

[0086] Sfh is a preset step, which can be set to 2 Hz. The adjustment range of the compressor and the water pump is controlled between the maximum frequency and the minimum frequency.

[0087] Climbing load:

[0088] When the target deviation > 100 is detected, the climbing load adjustment of the unit is adjusted, and the target frequency = current target frequency + DB.

[0089] Climbing unload:

[0090] When the target deviation ≤ -100 is detected, the climbing unload adjustment of the unit is adjusted, and the target frequency = current target frequency - DB.

[0091] Climbing keep:

[0092] When -100 < target deviation ≤ 100 is detected, the target frequency = current target frequency.

[0093] Priority: climbing unload > climbing keep > climbing load.

[0094] The present application also proposes a mine air conditioning system using the above control method.

[0095] As shown in Figure 1 The mine air conditioning system comprises a combination cabinet 2, a refrigeration host 3, and a plurality of closed cooling towers 6, spray water pumps 5, cooling water pumps 4, and chilled water pumps 1.

[0096] The new air of the coal mining face is sent by using a negative pressure mode, that is, the whole roadway is under negative pressure; the refrigeration host 3 is arranged in series in the new air roadway to prepare chilled water, the chilled water is connected to the combined cabinet 2, each combined cabinet 2 exchanges heat with the new air, a mixed air cooling and dehumidifying mode is used to send the new air into the coal mining face (the mining area in the figure) after cooling and dehumidifying, and the exhaust air generated by the coal mining face exchanges heat with the closed cooling tower 6 to take away the heat load of the mine.

[0097] The combined cabinet 2 is a water-driven type, the air volume handled by a single combined cabinet can be adjusted by the water flow, when the load is reduced, the chilled water pump needs to be adjusted, so that the air volume handled by a single combined cabinet is reduced, and the overall machine efficiency is optimal.

[0098] The closed cooling tower 6 is also a water-driven type, when the load is reduced, the water pump frequency can be adjusted to reduce the water pump power consumption, so that the overall machine efficiency is increased.

[0099] The application further provides a computer readable storage medium for storing a computer program, and the computer program executes the mine air conditioning system control method.

[0100] It should be noted that the terms used above are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component and / or combinations thereof.

[0101] The relative arrangement, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present application, unless otherwise specified. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the authorized specification, if appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0102] In the description of the application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0103] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0104] In addition, it should be noted that the use of "first", "second" and the like to define parts only facilitates the differentiation of corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the application.

[0105] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. A mine air conditioning control method, characterized by, The method comprises the steps of: obtaining the amount of fresh air entering the roadway and the fresh air temperature; adjusting the number of open refrigeration hosts and the load of the air conditioning system according to the corresponding preset ranges in which the amount of fresh air and the fresh air temperature are located; adjusting the operating frequency of each water pump and compressor in the air conditioning system according to the target deviation of the amount of fresh air from the preset amount of fresh air, specifically comprising: calculating the climbing load value DC, DC = | δ - 100 | / 1000, δ is the target deviation obtained by subtracting the preset amount of fresh air from the amount of fresh air; calculating the adjustment total frequency DB, DB = Sfh × DC, Sfh is the preset step size; when the target deviation is greater than the first preset deviation, increasing the current frequency of the water pump and compressor of the air conditioning system by the calculated adjustment total frequency DB; when the target deviation is less than or equal to the second preset deviation, reducing the current frequency of the water pump and compressor of the air conditioning system by the calculated adjustment total frequency DB; when the target deviation is less than or equal to the first preset deviation and greater than the second preset deviation, keeping the frequency of the water pump and compressor of the air conditioning system at the current frequency.

2. The mine air conditioning control method of claim 1, wherein, The step of obtaining the amount of fresh air entering the roadway comprises the steps of: collecting the average wind speed V detected by the multiple evenly arranged anemometers in the roadway, and obtaining the amount of fresh air Q calculated by the average wind speed V and the cross-sectional area S of the roadway.

3. The mine air conditioning control method of claim 1, wherein, The smaller the amount of fresh air is, the fewer the number of open refrigeration hosts is.

4. The mine air conditioning control method of claim 1, wherein, The greater the amount of fresh air is, the higher the fresh air temperature is, and the greater the number of open refrigeration hosts is.

5. The mine air conditioning control method of claim 1, wherein, The preset ranges of the amount of fresh air and the fresh air temperature specifically comprise: dividing three fresh air temperature ranges with sequentially increasing temperatures by taking two temperature points, which are the first fresh air temperature range, the second fresh air temperature range and the third fresh air temperature range; dividing three fresh air ranges with sequentially increasing amounts of fresh air by taking two air volume points, which are the first fresh air range, the second fresh air range and the third fresh air range.

6. The mine air conditioning control method of claim 5, wherein, Adjusting the number of open refrigeration hosts according to the preset ranges in which the amount of fresh air and the fresh air temperature are located to control the air supply temperature of the coal mining face specifically comprises: when the fresh air temperature is in the first temperature range or the second temperature range or the third temperature range, and the amount of fresh air is in the first fresh air range, one water-cooled unit is opened; when the fresh air temperature is in the first temperature range or the second temperature range or the third temperature range, and the amount of fresh air is in the second fresh air range, two water-cooled units are opened; when the fresh air temperature is in the first temperature range or the second temperature range, and the amount of fresh air is in the third fresh air range, two water-cooled units are opened; when the fresh air temperature is in the third temperature range, and the amount of fresh air is in the third fresh air range, three water-cooled units are opened.

7. A mine air conditioning system, characterised in that, The control method adjusts the air supply temperature of the coal mining face.

8. A computer readable storage medium for storing a computer program, characterized in that, The computer program runs to perform the mine air conditioning control method of any one of claims 1 to 6.

Images