Intelligent cleaning device suitable for mountain photovoltaic module

Abstract

The invention provides an intelligent cleaning device suitable for a mountain photovoltaic module, and relates to a grid-connected photovoltaic power generation system, the intelligent cleaning device comprises a fixing mechanism, the fixing mechanism is composed of a first clamping piece and a second clamping piece, and the photovoltaic module is arranged between the first clamping piece and the second clamping piece; a first connecting rod and a second connecting rod are slidably connected to the top end of the first clamping piece and the top end of the second clamping piece, the first connecting rod is fixedly connected with the second connecting rod, and a cleaning mechanism is arranged in the first connecting rod. By arranging the cleaning mechanism, effective cleaning of the photovoltaic module is facilitated, so that the problems that according to an existing photovoltaic module in a power generation state, if the heating temperature exceeds a certain limit, permanent damage such as dark spots, welding spot melting and packaging material aging can be caused by local burnout of the photovoltaic module, and the service life of the photovoltaic module is prolonged are effectively solved. And the output power and the service life of the photovoltaic module are influenced.

Description

Technical Field

[0001] The invention relates to a grid-connected photovoltaic power generation system, in particular to an intelligent cleaning device suitable for mountain photovoltaic components. Background Art

[0002] Solar energy is an inexhaustible renewable energy source for human beings. It has the advantages of full cleanliness, absolute safety, relative extensiveness and maintenance-freeness, sufficient resources and potential economy. Solar energy has the advantages of cleanliness, renewability and flexible installed capacity. As a new power generation project in China, solar photovoltaic power generation system has become one of the hot spots of people's attention due to its safety, reliability, noiselessness, clean energy, rich resources, no geographical boundaries and short construction period. Its application will greatly reduce greenhouse gas emissions, reduce human dependence on fossil fuels, effectively reduce environmental pollution, and has obvious environmental benefits compared with traditional fossil energy. Photovoltaic modules are the core components of photovoltaic power generation systems. Photovoltaic modules can convert solar energy into electrical energy and are the most basic part of photovoltaic power generation systems. It is very necessary to design an intelligent cleaning device for photovoltaic modules, which can effectively reduce the occurrence of module hot spots. Under certain conditions, the blocked area in the series branch of the photovoltaic module in the power generation state is used as a load, consuming the energy generated by other areas, resulting in local overheating. The hot spot effect will reduce the output power of the module to a certain extent. If the heating temperature exceeds a certain limit, it will cause the photovoltaic module to burn locally to form dark spots, the solder joints to melt, the packaging materials to age, and other permanent damages, which are important factors affecting the output power and service life of the photovoltaic module. Therefore, in view of the above situation, it is urgent to develop an intelligent cleaning device suitable for mountain photovoltaic modules to overcome the shortcomings in current practical applications. Summary of the invention

[0003] The present invention provides an intelligent cleaning device suitable for mountain photovoltaic modules, which is used to solve the technical problem raised by the above background technology: the blocked area in the series branch of the existing photovoltaic modules in the power generation state is used as a load, consuming the energy generated by other areas, resulting in local overheating. The hot spot effect will reduce the output power of the module to a certain extent. If the heating temperature exceeds a certain limit, it will cause the photovoltaic module to be partially burned to form dark spots, the solder joints to melt, the packaging materials to age, and other permanent damages, affecting the output power and service life of the photovoltaic module.

[0004] In order to solve the above technical problems, the present invention discloses an intelligent cleaning device suitable for mountain photovoltaic modules, including: a fixing mechanism, the fixing mechanism is composed of a clamping member 1 and a clamping member 2, a photovoltaic module is arranged between the clamping member 1 and the clamping member 2, and the top ends of the clamping member 1 and the clamping member 2 are slidably connected with a connecting rod 1 and a connecting rod 2, and the connecting rod 1 is fixedly connected to the connecting rod 2, and a cleaning mechanism is arranged inside the connecting rod 1.

[0005] Preferably, the cleaning mechanism comprises: a connecting pipe 1, the connecting pipe 1 is arranged at the top of a connecting rod 1, and a plurality of through holes 1 are arranged at the bottom of the connecting pipe 1, and one end of the connecting pipe 1 located at the clamping connection 1 passes through the connecting rod 1 and is connected to the air compressor, and a PLC control valve 1 is arranged in the connecting pipe 1;

[0006] Connecting pipe 2, the connecting pipe 2 is arranged at the top of connecting rod 1, and the bottom of the connecting pipe 2 is provided with a plurality of through holes 2, and the end of the connecting pipe 2 located at the clamping 1 passes through the connecting rod 1 and is connected to the connecting waterway, and a PLC control valve 2 is installed in the connecting pipe 2.

[0007] Preferably, the intelligent cleaning device suitable for mountain photovoltaic modules is also provided with a cleaning mechanism, which includes: a plurality of electric telescopic rods, the fixed ends of the electric telescopic rods are fixedly installed on the top inner side of the second connecting rod, the output ends of the electric telescopic rods pass through the third through hole and are fixedly connected to the long rod, and a chain-shaped brush is fixedly installed on the bottom end of the long rod.

[0008] Preferably, a moving wheel is rotatably connected to the bottom end of the inner part of the first clamp, and the moving wheel is connected to the first clamp for left and right movement. A driving motor is fixedly installed in the second clamp, and a threaded rod is fixedly installed on the output end of the driving motor. The other end of the threaded rod is rotatably connected to the inner wall of the second clamp, and a slider is threadedly connected to the threaded rod, and the bottom end of one side of the connecting rod one and the connecting rod two is fixedly installed on the top of the slider.

[0009] Preferably, the intelligent cleaning device suitable for mountain photovoltaic modules further includes a control unit, which is electrically connected to PLC control valve 1 and PLC control valve 2, and the control unit is also electrically connected to the electric telescopic rod and the drive motor.

[0010] Preferably, the intelligent cleaning device adapted for mountain photovoltaic modules, wherein the air compressor is an oil-injected screw air compressor, further comprises:

[0011] A first temperature sensor, used to detect the initial temperature of the gas during compression;

[0012] A second temperature sensor is used to detect the initial temperature of the gas when it is discharged;

[0013] The third temperature sensor is used to detect the injection temperature of the oil-injected screw air compressor;

[0014] An alarm and a controller are electrically connected to the first temperature sensor, the second temperature sensor and the third temperature sensor.

[0015] Preferably, the controller controls the alarm to work based on the first temperature sensor, the second temperature sensor and the third temperature sensor, comprising the following steps:

[0016] Step 1: According to formula (1) and the detection values ​​of the first temperature sensor, the second temperature sensor and the third temperature sensor, calculate the actual work K done by the external force on the gas during the gas compression process when there is heat exchange between the gas and the outside during compression:

[0017]

[0018] Where α is the polynomial index of gas state change, λ is the gas constant, T 1 is the detection value of the first temperature sensor, P 1 is the initial pressure of the gas during compression, P 2 is the pressure at the end of gas compression, Q q is the gas mass flow rate, c q is the specific heat capacity of the gas at constant pressure, T 2 is the detection value of the second temperature sensor, Q y is the circulating oil injection volume of the oil-injected screw air compressor, c y is the specific heat capacity at constant pressure of the lubricating oil in the oil-injected screw compressor, T 3 is the detection value of the third temperature sensor, W y is the rated output shaft power of the oil-injected screw air compressor;

[0019] Step 2: According to the following formula (2), the actual air volume N passing through the oil-injected screw air compressor per unit time is calculated. The controller compares the actual air volume N of the oil-injected screw air compressor with the preset air volume range. When the actual air volume is lower than the preset air volume range, the controller controls the alarm to sound an alarm:

[0020]

[0021] Where r is the radius of the connecting pipe, P 3 is the pressure of the gas ejected from the connecting pipe, P 4 is the pressure of the gas in the connecting pipe 1, P 0 is the atmospheric pressure, e is the base of the natural logarithm function, β is the volume coefficient of the oil-injected screw air compressor, χ is the exhaust coefficient of the oil-injected screw air compressor, μ is the volume coefficient pressure coefficient of the oil-injected screw air compressor, θ is the temperature coefficient of the oil-injected screw air compressor, K l It is the theoretical work done by external force on the gas during the gas compression process when there is heat exchange between the gas and the outside world during compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A front view of the structure provided by an embodiment of the present invention;

[0024] Figure 2 A right side view of the internal structure of a connecting rod provided by an embodiment of the present invention;

[0025] Figure 3 A right view of the internal structure of the second connecting rod provided by an embodiment of the present invention;

[0026] Figure 4 A top view of a connecting rod structure provided by an embodiment of the present invention;

[0027] Figure 5 A top view of the internal structure of the second card provided in an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Card part 1; 2. Card part 2; 3. Photovoltaic module; 4. Connecting rod 1; 5. Connecting rod 2; 6. Chain brush; 7. Connecting pipe 1; 8. Through hole 1; 9. PLC controlled valve 1; 10. Connecting pipe 2; 11. Through hole 2; 12. PLC controlled valve 2; 13. Electric telescopic rod; 14. Through hole 3; 15. Long rod; 16. Moving wheel; 17. Driving motor; 18. Threaded rod; 19. Slider. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The present invention provides the following embodiments

[0033] Example 1

[0034] The embodiment of the present invention provides an intelligent cleaning device suitable for mountain photovoltaic modules, such as Figure 1 As shown, an intelligent cleaning device suitable for mountain photovoltaic modules includes: a fixing mechanism, the fixing mechanism is composed of a clamp 1 and a clamp 2, a photovoltaic module 3 is arranged between the clamp 1 and the clamp 2, and the top ends of the clamp 1 and the clamp 2 are slidably connected with a connecting rod 4 and a connecting rod 2 5 (the connecting rod 1 4 and the connecting rod 2 5 are made of stainless steel), and the connecting rod 1 4 is fixedly connected to the connecting rod 2 5, and a cleaning mechanism is arranged inside the connecting rod 1 4.

[0035] The beneficial effects of the above technical solution are as follows: the present invention is conducive to the effective cleaning of photovoltaic modules by setting up a cleaning mechanism, thereby effectively improving the technical problem proposed in the background technology: the blocked areas in the series branches of the existing photovoltaic modules in the power generation state are treated as loads, consuming the energy generated by other areas, resulting in local overheating. The hot spot effect will reduce the output power of the module to a certain extent. If the heating temperature exceeds a certain limit, it will cause local burning of the photovoltaic module to form dark spots, melting of solder joints, aging of packaging materials and other permanent damage, affecting the output power and service life of the photovoltaic module.

[0036] Example 2

[0037] On the basis of Example 1, Figure 1-5As shown, the intelligent cleaning device suitable for mountain photovoltaic modules, the cleaning mechanism includes: a connecting pipe 7, the connecting pipe 7 is arranged at the top of the connecting rod 4, and the bottom of the connecting pipe 7 is provided with a plurality of through holes 8 (the through holes 8 are circular holes with an aperture of 3 mm), and the connecting pipe 7 is located at one end of the clamping joint 1 and penetrates the connecting rod 4 to be connected to the air compressor, and a PLC control valve 9 is provided in the connecting pipe 7;

[0038] A connecting pipe 10 is provided at the top of a connecting rod 4, and a plurality of through holes 11 are provided at the bottom of the connecting pipe 10 (the through holes 11 are small circular holes with a diameter of 3 mm), and one end of the connecting pipe 10 located at the clamping joint 1 passes through the connecting rod 4 and is connected to the connecting waterway, and a PLC control valve 12 is provided in the connecting pipe 10.

[0039] Optionally, the intelligent cleaning device suitable for mountain photovoltaic modules is also provided with a cleaning mechanism, which includes: a plurality of electric telescopic rods 13, the fixed ends of the electric telescopic rods 13 are fixedly installed on the top of the inner part of the connecting rod 2 5, the output ends of the electric telescopic rods 13 pass through the through hole 3 14 and are fixedly connected to the long rod 15, and the bottom end of the long rod 15 is fixedly installed with a chain brush 6.

[0040] Optionally, a moving wheel 16 is rotatably connected to the bottom end of the inner part of the clamp 1, and the moving wheel 16 is connected to the clamp 1 for left and right movement. A driving motor 17 is fixedly installed in the clamp 2, and a threaded rod 18 is fixedly installed at the output end of the driving motor 17. The other end of the threaded rod 18 is rotatably connected to the inner wall of the clamp 2, and a slider 19 is threadedly connected to the threaded rod 18, and the bottom end of one side of the connecting rod 1 4 and the connecting rod 2 5 is fixedly installed on the top of the slider 19.

[0041] Optionally, the intelligent cleaning device suitable for mountain photovoltaic modules also includes a control unit, which is electrically connected to PLC control valve 1 9 and PLC control valve 2 12, and the control unit is also electrically connected to the electric telescopic rod 13 and the drive motor 17.

[0042] The working principle of the above technical solution is as follows: when it is necessary to clean the dust on the surface of the photovoltaic module 3, firstly, the driving motor 17 is started by the control unit, and the driving motor 17 drives the threaded rod 18 to rotate, and the rotation of the threaded rod 18 drives the slider 19 threadedly connected thereto to move left and right, and the left and right movement of the slider 19 drives the connecting rod 14 and the connecting rod 25 fixedly connected thereto to move accordingly, and then the air compressor and the PLC control valve 19 are started by the control unit, and the air compressor outputs the high-pressure gas to the photovoltaic module 3 through the connecting pipe 17 and through a plurality of through holes 18, so as to clean the dust on the photovoltaic module 3, and then the air compressor is closed. The machine opens the PLC control valve 12, and the high-pressure water is sprayed onto the photovoltaic module 3 through the connecting pipe 10 and through the plurality of through holes 11, so as to clean the surface of the photovoltaic module 3. After cleaning, the electric telescopic rod 13 is started, and the electric telescopic rod 13 starts to drive the long rod 15 and the chain-shaped brush 6 fixedly connected to the long rod 15 to move downward, and the chain-shaped brush 6 moves downward to the surface of the photovoltaic module 3, so as to effectively scrape off the water on the surface of the photovoltaic module 3. When the device is started, the compressed air is used to blow away the dust for five minutes, the water is sprayed for five minutes, and the brush is scraped from left to right for five minutes. It is estimated that the cleaning of a group of photovoltaic panels can be completed in fifteen minutes.

[0043] The beneficial effects of the above technical scheme are as follows: by setting the connecting rod 1 4 and the connecting rod 2 5 to stainless steel, the surface of the stainless steel material is smooth, not easy to absorb dust and dirt, easy to clean and maintain, and stainless steel has good corrosion resistance and wear resistance, and a long service life; the present invention is conducive to realizing the control of the connecting pipe 1 7 and the connecting pipe 2 10 by setting the PLC control valve 1 9 and the PLC control valve 2 12; by setting the driving motor 17 and the threaded rod 18, it is conducive to realizing the left and right movement of the connecting rod 1 4 and the connecting rod 2 5; by setting the electric telescopic rod 13 and the chain brush 6, it is conducive to realizing the effective scraping of water on the surface of the photovoltaic module 3; by setting a plurality of through holes 1 8 and through holes 2 11, it is conducive to realizing the comprehensive removal of dust on the surface of the photovoltaic module 3; by setting the air compressor and the connecting waterway, it is conducive to realizing the effective transportation of gas and liquid, which is very convenient and practical.

[0044] Example 3

[0045] On the basis of Example 1-2, Figure 1-2 As shown, an intelligent cleaning device suitable for mountain photovoltaic modules, wherein the air compressor is an oil-injected screw air compressor, further comprising:

[0046] A first temperature sensor, used to detect the initial temperature of the gas during compression;

[0047] A second temperature sensor is used to detect the initial temperature of the gas when it is discharged;

[0048] The third temperature sensor is used to detect the injection temperature of the oil-injected screw air compressor;

[0049] An alarm and a controller are electrically connected to the first temperature sensor, the second temperature sensor and the third temperature sensor.

[0050] Optionally, the controller controls the alarm to work based on the first temperature sensor, the second temperature sensor, and the third temperature sensor, comprising the following steps:

[0051] Step 1: According to formula (1) and the detection values ​​of the first temperature sensor, the second temperature sensor and the third temperature sensor, calculate the actual work K done by the external force on the gas during the gas compression process when there is heat exchange between the gas and the outside during compression:

[0052]

[0053] Where α is the polytropic index in the gas state change (used to describe the thermodynamic properties of the gas in the polytropic process, with a value range of 0.24-0.68), λ is the gas constant, T 1 is the detection value of the first temperature sensor, P 1 is the initial pressure of the gas during compression, P 2 is the pressure at the end of gas compression, Q q is the gas mass flow rate, c q is the specific heat capacity of the gas at constant pressure, T 2 is the detection value of the second temperature sensor, Q y is the circulating oil injection volume of the oil-injected screw air compressor, c y is the specific heat capacity at constant pressure of the lubricating oil in the oil-injected screw compressor, T 3 is the detection value of the third temperature sensor, W y is the rated output shaft power of the oil-injected screw air compressor;

[0054] Step 2: According to the following formula (2), the actual air volume N passing through the oil-injected screw air compressor per unit time is calculated. The controller compares the actual air volume N of the oil-injected screw air compressor with the preset air volume range. When the actual air volume is lower than the preset air volume range, the controller controls the alarm to sound an alarm:

[0055]

[0056] Where r is the radius of the connecting pipe 7, P 3 is the pressure of the gas ejected from the connecting pipe 7, P 4 is the pressure of the gas in the connecting pipe 7, P 0is the atmospheric pressure, e is the base of the natural logarithm function, β is the volume coefficient of the oil-injected screw air compressor (the value range is 0.12-0.46), χ is the exhaust coefficient of the oil-injected screw air compressor (the value range is 0.23-0.66), μ is the volume coefficient pressure coefficient of the oil-injected screw air compressor (the value range is 0.34-0.74), θ is the temperature coefficient of the oil-injected screw air compressor (the value range is 0.56-0.98), K l It is the theoretical work done by external force on the gas during the gas compression process when there is heat exchange between the gas and the outside world during compression.

[0057] The beneficial effects of the above technical solution are as follows: the controller controls the operation of the alarm based on the first temperature sensor, the second temperature sensor and the third temperature sensor. First, according to formula (1), the actual work done by the external force on the gas during the gas compression process when the gas has heat exchange with the outside during compression is calculated. By comprehensively considering the polynomial index in the gas state change, the gas constant, the initial pressure of the gas during compression, the pressure at the end of the gas compression, the gas mass flow rate, the specific constant-pressure heat capacity of the gas, the cyclic injection amount of the oil-injected screw air compressor, the specific constant-pressure heat capacity of the lubricating oil in the oil-injected screw air compressor, and the rated output shaft power of the oil-injected screw air compressor, the calculation result is more accurate and reliable.

[0058] Then, according to formula (2), the actual air volume passing through the oil-injected screw air compressor per unit time is calculated, and the radius of the connecting pipe 7, the pressure of the gas ejected from the connecting pipe 7, the pressure of the gas in the connecting pipe 7, the atmospheric pressure, the volume coefficient of the oil-injected screw air compressor, the exhaust coefficient of the oil-injected screw air compressor, the volume coefficient and pressure coefficient of the oil-injected screw air compressor, the temperature coefficient of the oil-injected screw air compressor, and the theoretical work done by the external force on the gas during the gas compression process when there is heat exchange between the gas and the outside during compression, so that the calculation result is more accurate and reliable;

[0059] The controller controls the operation of the first temperature sensor, the second temperature sensor and the third temperature sensor. The controller compares the actual air volume of the oil-injected screw air compressor with the preset air volume range. When the actual air volume is lower than the preset air volume range, the controller controls the alarm to sound an alarm, reminding the staff to repair or replace the air compressor in time, thereby meeting the user's demand for this kind of intelligent cleaning device suitable for mountain photovoltaic modules.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent cleaning device suitable for mountain photovoltaic modules, characterized in that: include: A fixing mechanism, the fixing mechanism is composed of a clamping member 1 (1) and a clamping member 2 (2), a photovoltaic assembly (3) is arranged between the clamping member 1 (1) and the clamping member 2 (2), and a connecting rod 1 (4) and a connecting rod 2 (5) are slidably connected at the top ends of the clamping member 1 (1) and the clamping member 2 (2), and the connecting rod 1 (4) is fixedly connected to the connecting rod 2 (5), and a cleaning mechanism is arranged inside the connecting rod 1 (4).

2. The intelligent cleaning device for mountain photovoltaic modules according to claim 1, characterized in that The cleaning mechanism comprises: a connecting pipe (7), the connecting pipe (7) is arranged at the top of a connecting rod (4), and a plurality of through holes (8) are arranged at the bottom of the connecting pipe (7), and one end of the connecting pipe (7) located at the clamping joint (1) passes through the connecting rod (4) and is connected to the air compressor, and a PLC control valve (9) is arranged in the connecting pipe (7); A connecting pipe 2 (10), the connecting pipe 2 (10) is arranged at the top end of the connecting rod 1 (4), and a plurality of through holes 2 (11) are arranged at the bottom end of the connecting pipe 2 (10), and one end of the connecting pipe 2 (10) located at the clamping joint 1 (1) passes through the connecting rod 1 (4) and is connected to the connecting waterway, and a PLC control valve 2 (12) is arranged inside the connecting pipe 2 (10).

3. The intelligent cleaning device for mountain photovoltaic modules according to claim 1, characterized in that A cleaning mechanism is also provided, the cleaning mechanism comprising: a plurality of electric telescopic rods (13), the fixed ends of the electric telescopic rods (13) being fixedly mounted on the top end of the inner portion of the second connecting rod (5), the output ends of the electric telescopic rods (13) passing through the third through hole (14) and being fixedly connected to the long rod (15), and a chain-shaped brush (6) being fixedly mounted on the bottom end of the long rod (15).

4. The intelligent cleaning device for mountain photovoltaic modules according to claim 1, characterized in that: The bottom end of the interior of the first clamp (1) is rotatably connected to a moving wheel (16), and the moving wheel (16) is connected to the first clamp (1) in a manner that it can move left and right. A driving motor (17) is fixedly installed in the second clamp (2), and a threaded rod (18) is fixedly installed at the output end of the driving motor (17). The other end of the threaded rod (18) is rotatably connected to the inner wall of the second clamp (2), and a slider (19) is threadedly connected to the threaded rod (18), and the bottom end of one side of the connecting rod (4) and the connecting rod (5) is fixedly installed at the top of the slider (19).

5. The intelligent cleaning device for mountain photovoltaic modules according to claim 1, characterized in that: It also includes a control unit, which is electrically connected to the PLC control valve 1 (9) and the PLC control valve 2 (12), and the control unit is also electrically connected to the electric telescopic rod (13) and the drive motor (17).

6. The intelligent cleaning device for mountain photovoltaic modules according to claim 2, characterized in that: The air compressor is an oil-injected screw air compressor, and further comprises: A first temperature sensor, used to detect the initial temperature of the gas during compression; A second temperature sensor is used to detect the initial temperature of the gas when it is discharged; The third temperature sensor is used to detect the injection temperature of the oil-injected screw air compressor; An alarm and a controller are electrically connected to the first temperature sensor, the second temperature sensor and the third temperature sensor.

7. The intelligent cleaning device for mountain photovoltaic modules according to claim 6, characterized in that: The controller controls the alarm to work based on the first temperature sensor, the second temperature sensor and the third temperature sensor, comprising the following steps: Step 1: According to formula (1) and the detection values ​​of the first temperature sensor, the second temperature sensor and the third temperature sensor, calculate the actual work K done by the external force on the gas during the gas compression process when there is heat exchange between the gas and the outside during compression: Where α is the polynomial index of gas state change, λ is the gas constant, T1 is the detection value of the first temperature sensor, P1 is the initial pressure of gas during compression, P2 is the pressure at the end of gas compression, Q q is the gas mass flow rate, c q is the specific heat capacity of the gas at constant pressure, T2 is the detection value of the second temperature sensor, Q y is the circulating oil injection volume of the oil-injected screw air compressor, c y is the specific constant-pressure heat capacity of the lubricating oil in the oil-injected screw air compressor, T3 is the detection value of the third temperature sensor, W y is the rated output shaft power of the oil-injected screw air compressor; Step 2: According to the following formula (2), the actual air volume N passing through the oil-injected screw air compressor per unit time is calculated. The controller compares the actual air volume N of the oil-injected screw air compressor with the preset air volume range. When the actual air volume is lower than the preset air volume range, the controller controls the alarm to sound an alarm: Where r is the radius of the connecting pipe (7), P3 is the pressure of the gas when it is ejected from the connecting pipe (7), P4 is the pressure of the gas in the connecting pipe (7), P0 is the atmospheric pressure, e is the base of the natural logarithm function, β is the volume coefficient of the oil-injected screw air compressor, χ is the exhaust coefficient of the oil-injected screw air compressor, μ is the volume coefficient / pressure coefficient of the oil-injected screw air compressor, θ is the temperature coefficient of the oil-injected screw air compressor, and K l It is the theoretical work done by external force on the gas during the gas compression process when there is heat exchange between the gas and the outside world during compression.

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