Defogging device for surveying instrument lens of surveying and mapping engineering

Abstract

The utility model discloses a surveying engineering surveying instrument lens demisting device which comprises a demisting device body installed on a surveying instrument lens, the inner side of the surveying instrument lens is fixedly connected with a lens, the inner wall of the top of the surveying instrument lens is provided with an air outlet hole, the inner wall of the bottom of the surveying instrument lens is provided with an inclined air inlet hole, and the air inlet hole is communicated with the air outlet hole. The air inlet and the air outlet are positioned on the left side of the lens; the demisting device body comprises an annular plate which is fixedly arranged on the outer side of a surveying instrument lens in a sleeving manner. By arranging a series of structures, the inner side of the lens can be automatically and timely demisted in a mode of detecting the humidity value of the inner side, and the outer side of the lens is integrally and automatically blown and dedusted by virtue of discharged hot air during demisting, so that the automation degree of demisting and cleaning is improved; and the outer side of the lens can be effectively cleaned in a regular and automatic manner through cooperation of flushing and drying, so that the use work is prevented from being affected by impurities and dust attached to the outer side, and the cleaning comprehensiveness and effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of surveying and mapping engineering, in particular to a lens defogging device for a surveying and mapping engineering surveyor. Background Art

[0002] Surveying and mapping engineering is a project that uses surveying and mapping equipment to collect, process and analyze spatial information. Modern surveying and mapping technology has undergone tremendous changes compared to traditional surveying and mapping technology. The surveying and mapping equipment used is becoming more and more advanced. The emergence of surveying and mapping equipment has greatly facilitated the progress of surveying and mapping work and improved the accuracy and efficiency of surveying and mapping. With the continuous development of society, there are more and more applications for surveying and mapping equipment, and there are more and more applications for auxiliary surveying and mapping devices. However, when using auxiliary surveying and mapping devices in some surveying and mapping projects, they cannot quickly perform auxiliary defog processing when water mist appears inside the lens of the surveying and mapping instrument. The method of disassembly and cleaning by professionals not only increases the cost investment, but also reduces the efficiency of lens defogger, affecting the normal use of the surveying and mapping instrument.

[0003] In this regard, after searching, publication number CN219735923U discloses a demisting device for a surveying and mapping engineering surveying instrument lens, including a surveying instrument lens, a positioning frame is provided on the outer side of the surveying instrument lens, a bellows is fixedly connected to the top of the positioning frame at the top, a box cover is hingedly connected to the top of the bellows, and a fan is fixedly connected to the bottom end of the inner side of the bellows. Through the fan, drying filter, control switch and air outlet pipe, when water mist appears on the surveying instrument lens, the control switch is triggered after the baffle is pulled to compress the first spring, and the fan can continuously draw the external air through the drying filter for drying and filtering, and then blow it to the surveying instrument lens through the air pipe with a one-way valve, and cooperate with the compression of the second spring by the pressure plate and the pressing of the sealing gasket by the slide plate, so as to realize the auxiliary rapid air drying and demisting treatment of the surveying instrument lens after the sealing connection, which is simple and convenient to operate, not only improves the demisting efficiency, but also avoids the cost expenditure caused by demisting, and ensures the normal use of the device.

[0004] The above technology discloses a demisting device for the lens of a surveying and mapping engineering surveyor. The device can dry and demist the inner side of the lens of the surveyor by means of a fan, a drying filter, a control switch, an exhaust pipe and other structures. However, the following shortcomings still exist during use: 1. Only the inner side of the lens of the surveyor can be demisted by air. During use, the outer side of the lens is also easily contaminated with a lot of dust and impurities due to environmental factors, resulting in external blocking. The outer side of the lens cannot be automatically and effectively cleaned, and the cleaning comprehensiveness is not ideal. 2. When demisting, personnel need to manually push the baffle and trigger the control switch to control the start of the fan. The device cannot automatically and timely perform demisting work when fog is generated due to high humidity inside. In view of this, we propose a demisting device for the lens of a surveying and mapping engineering surveyor. Utility Model Content

[0005] The purpose of the utility model is to provide a lens defogging device for a surveying and mapping engineering surveying instrument to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a defogging device for a surveying and mapping engineering surveying instrument lens, comprising a defogging device body installed on the surveying and mapping instrument lens, a lens fixedly connected to the inner side of the surveying and mapping instrument lens, an air outlet opening on the top inner wall of the surveying and mapping instrument lens, an air inlet opening inclinedly arranged on the bottom inner wall of the surveying and mapping instrument lens, and both the air inlet opening and the air outlet opening being located on the left side of the lens;

[0007] The demisting device body comprises an annular plate fixedly sleeved on the outer side of the surveying instrument lens, a circular box movably sleeved on the surveying instrument lens and fixed on the right side of the annular plate, the left side of the circular box is set as an opening, sealing strips are bonded and fixed on the front inner wall and the rear inner wall of the circular box, and the adjacent sides of the two sealing strips are respectively in active contact with the front and rear sides of the surveying instrument lens, a PLC controller is fixedly installed on the left side of the bottom of the circular box, a humidity sensor is fixedly connected to the bottom inner wall of the circular box, a hot air supply assembly is installed on the bottom inner wall of the circular box, the hot air supply assembly and the humidity sensor are both electrically connected to the PLC controller, the air inlet hole is used for the circular box to communicate with the inside of the surveying instrument lens, the humidity sensor is used for real-time detection of the humidity in the circular box and transmits the humidity value to the PLC controller, the hot air supply assembly is used for supplying hot air into the circular box under the control of the PLC controller, and the hot air is blown into the left side of the lens through the air inlet hole for drying and demisting;

[0008] A water supply component electrically connected to the PLC controller is embedded and fixed on the top of the round box. The right side of the round box is connected to the right side of the water supply component and a one-way spray and blow-clean component is fixed thereon. The one-way spray and blow-clean component cooperates with the right side of the lens, and the hot air entering the inside of the surveying instrument lens is discharged into the round box through the air outlet. The one-way spray and blow-clean component is used to guide the discharged hot air to the right side of the lens to blow away dust, and the water supply component is used to be controlled by the PLC controller to rinse the right side of the lens through the one-way spray and blow-clean component.

[0009] Preferably, the hot air supply assembly includes an L-shaped filter fixedly connected between the bottom inner wall and the right inner wall of the round box, and a hot air blower embedded and fixed on the bottom inner wall of the round box is provided below the L-shaped filter. The bottom of the hot air blower is an air inlet and is fixedly connected with breathable absorbent cotton. The top of the hot air blower is an air outlet, and the hot air blower is electrically connected to the PLC controller.

[0010] Preferably, the water supply assembly includes a water tank embedded and fixed on the top of the round box, a water pump electrically connected to the PLC controller is fixedly installed on the right side of the water tank, and the water inlet of the water pump extends into the water tank and is connected and fixedly connected to an L-shaped pipe.

[0011] Preferably, the one-way spray blowing component includes a rectangular vertical tube with a blocking structure on the top, the bottom end of the rectangular vertical tube is connected and fixed with a horizontal tube with blocking structures at the front and rear ends, the bottom of the horizontal tube is connected and fixed with a plurality of inclined blowing heads, the blowing heads are located on the right side of the lens and cooperate with the lens, the left side of the rectangular vertical tube is connected and fixed with a first one-way valve and a second one-way valve with the right side as the outlet, the left side of the first one-way valve is connected and fixed with the right top of the round box, and the left side of the second one-way valve is connected and fixed with the water outlet of the water pump.

[0012] Preferably, the air inlet and the air outlet are both located in the round box.

[0013] Preferably, four thread grooves are formed in an annular shape and are equidistantly spaced on the left side of the round box, knob-type bolts are threadedly sleeved in the thread grooves, and the annular plate is threadedly sleeved on the four knob-type bolts.

[0014] Preferably, the PLC controller is a timer programmable controller, which can pre-set the start and stop time and interval of the water pump according to the cleaning requirements, and control the hot air blower to start for fifteen seconds after the water pump is turned off.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This is a lens defogging device for surveying and mapping engineering surveying instruments. Through the cooperation of the air inlet, air outlet, round box, humidity sensor, PLC controller, hot air supply component and one-way spray blowing component, it can detect the humidity inside the lens of the surveying instrument in real time, and automatically blow hot air into the inside when the humidity exceeds the preset value, and use the hot air to blow and defog the left side of the lens, and can use the hot air discharged after the blowing and defog to automatically blow and remove dust from the outside of the lens, thereby improving the degree of automation of defog and cleaning;

[0017] 2. This is a lens defogger for surveying and mapping engineering surveying instruments. Through the cooperation of a PLC controller, a round box, a hot air supply component, a water supply component and a one-way spray blowing component, the PLC controller is used to pre-set the start and stop time and interval of the hot air blower and the water pump according to the needs of on-site deep cleaning. The pre-set hot air blower start and stop time is after the water pump start and stop time. The lens outer side can be automatically rinsed and dried in turn at regular intervals, so as to achieve the effect of automatic and effective cleaning of the lens outer side through the combination of rinsing and drying at regular intervals, avoid impurities and dust on the outer side that affect the use of the work, and improve the comprehensiveness and effect of cleaning.

[0018] The utility model is provided with a series of structures, which facilitates automatic and timely defogging of the inner side of the lens by detecting the humidity value of the inner side, and automatically blows away dust from the outer side of the lens by exhausting hot air during defogging, thereby improving the degree of automation of defogging and cleaning, and facilitates automatic and effective cleaning of the outer side of the lens by flushing and drying at a regular time, thereby preventing impurities and dust from sticking to the outer side and affecting the use of the lens, thereby improving the comprehensiveness and effect of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a lens defogging device for surveying and mapping engineering surveying and mapping instruments proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the main cross-sectional structure of a lens defogging device for surveying and mapping engineering surveying instruments proposed by the utility model;

[0021] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A in the figure.

[0022] In the figure: 1. Surveying instrument lens; 101. Lens; 102. Ring plate; 2. Air inlet; 3. Air outlet; 4. Round box; 5. Hot air blower; 6. L-shaped filter; 7. PLC controller; 8. Humidity sensor; 9. Water tank; 10. Water pump; 11. First one-way valve; 12. Second one-way valve; 13. Rectangular vertical pipe; 14. Horizontal pipe; 15. Blowing head; 16. Breathable and absorbent cotton. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figures 1 to 3 As shown, a defogging device for a surveying and mapping engineering surveying and mapping instrument lens proposed in this embodiment comprises a defogging device body installed on a surveying and mapping instrument lens 1, a lens 101 is fixedly connected to the inner side of the surveying and mapping instrument lens 1, an air outlet 3 is provided on the top inner wall of the surveying and mapping instrument lens 1, an air inlet 2 is provided on the bottom inner wall of the surveying and mapping instrument lens 1, and both the air inlet 2 and the air outlet 3 are located on the left side of the lens 101;

[0025] The demisting device body includes an annular plate 102 fixedly sleeved on the outer side of the surveying instrument lens 1, and a circular box 4 installed and fixed on the right side of the annular plate 102 is movably sleeved on the surveying instrument lens 1, wherein a circular through-hole movably contacting the outer side of the surveying instrument lens 1 is opened on the right inner wall of the circular box 4, and the circular box 4 is movably sleeved on the surveying instrument lens 1 through the circular through-hole, and four threaded grooves are opened in an annular shape at equal intervals on the left side of the circular box 4, and knob-type bolts are threadedly sleeved in the threaded grooves, and the annular plate 102 is threadedly sleeved on the four knob-type bolts, wherein four threaded holes threadedly connected to the corresponding knob-type bolts are opened on the right side of the annular plate 102, and the four knob-type bolts are used to threadably install and fix the circular box 4 and the annular plate 102, and the left side of the circular box 4 is set as an opening, and the air inlet 2 and the air outlet 3 are both Located in the round box 4, sealing strips are bonded and fixed on the front inner wall and the rear inner wall of the round box 4, and the adjacent sides of the two sealing strips are in active contact with the front and rear sides of the surveying instrument lens 1 respectively. A PLC controller 7 is fixedly installed on the left side of the bottom of the round box 4, and a humidity sensor 8 is fixedly connected to the bottom inner wall of the round box 4. A hot air supply component is installed on the bottom inner wall of the round box 4, and the hot air supply component and the humidity sensor 8 are both electrically connected to the PLC controller 7. The air inlet 2 is used for the round box 4 to communicate with the inside of the surveying instrument lens 1, and the humidity sensor 8 is used to detect the humidity in the round box 4 in real time and transmit the humidity value to the PLC controller 7. The hot air supply component is used to be controlled by the PLC controller 7 to supply hot air into the round box 4, and the hot air is blown into the left side of the lens 101 through the air inlet 2 to dry and defog;

[0026] A water supply component electrically connected to the PLC controller 7 is embedded and fixed on the top of the round box 4. The right side of the round box 4 is connected to the right side of the water supply component and is fixed with a one-way spray and blow-cleaning component. The one-way spray and blow-cleaning component cooperates with the right side of the lens 101. The hot air entering the inside of the surveying instrument lens 1 is discharged into the round box 4 through the air outlet 3. The one-way spray and blow-cleaning component is used to guide the discharged hot air to the right side of the lens 101 to blow away dust. The water supply component is used to be controlled by the PLC controller 7 to rinse the right side of the lens 101 through the one-way spray and blow-cleaning component.

[0027] Specifically, the hot air supply assembly includes an L-shaped filter 6 fixedly connected between the bottom inner wall and the right inner wall of the round box 4, the front and rear sides of the L-shaped filter 6 are also fixedly installed with the side walls of the round box 4, and a hot air blower 5 is provided below the L-shaped filter 6 and is embedded and fixed on the bottom inner wall of the round box 4, wherein an embedding hole fixedly connected to the outer side of the hot air blower 5 is opened on the bottom inner wall of the round box 4, which plays the effect of embedding and fixing the hot air blower 5, and the bottom of the hot air blower 5 is an air inlet and fixed It is connected with breathable absorbent cotton 16, and the top of the hot air blower 5 is the air outlet. The hot air blower 5 is electrically connected to the PLC controller 7. The L-shaped filter 6, the hot air blower 5 and the breathable absorbent cotton 16 cooperate with each other. When the breathable absorbent cotton 16 draws external air at the air inlet of the hot air blower 5, the water vapor in the gas is absorbed and dehumidified. The hot air blower 5 blows hot air into the round box 4. The hot air is filtered by the L-shaped filter 6 and then blown into the air inlet 2 to achieve drying and defogging of the left side of the lens 101.

[0028] Furthermore, the water supply component includes a water tank 9 embedded and fixed on the top of the round box 4, wherein the top of the round box 4 is provided with an embedding hole fixedly connected to the outside of the water tank 9, a water supply pipe is connected and fixed to the left side of the top of the water tank 9, and a water pump 10 electrically connected to the PLC controller 7 is fixedly installed on the right side of the water tank 9, and the water inlet of the water pump 10 extends into the water tank 9 and is connected and fixed with an L-shaped pipe; the water tank 9, water pump 10 and L-shaped pipe are arranged in coordination, and the water pump 10 is controlled by the PLC controller 7 to start at a fixed time to extract water from the water tank 9 and pump it to the right.

[0029] Furthermore, the one-way spray blowing assembly includes a rectangular vertical tube 13 with a blocking structure at the top, the bottom end of the rectangular vertical tube 13 is connected and fixed with a horizontal tube 14 with both front and rear ends being blocking structures, the bottom of the horizontal tube 14 is connected and fixed with a plurality of inclined blowing heads 15, the blowing heads 15 are located on the right side of the lens 101 and cooperate with the lens 101, the left side of the rectangular vertical tube 13 is connected and fixed with a first one-way valve 11 and a second one-way valve 12 with the right side as an outlet, the left side of the first one-way valve 11 is connected and fixed with the top of the right side of the round box 4, and the second one-way valve 12 is connected and fixed. 2 is connected and fixed with the water outlet of the water pump 10; the horizontal pipe 14, the rectangular vertical pipe 13, the blowing head 15, the first one-way valve 11 and the second one-way valve 12 are arranged to cooperate, and the hot air discharged into the round box 4 enters the horizontal pipe 14 through the first one-way valve 11 and the rectangular vertical pipe 13 in turn, and then blows downward through the blowing head 15 to blow away dust on the right side of the lens 101. When the water pump 10 pumps water to the right, the water enters the horizontal pipe 14 through the second one-way valve 12 and the rectangular vertical pipe 13 in turn, and then is sprayed out through the blowing head 15 to rinse and clean the right side of the lens 101.

[0030] Furthermore, the PLC controller 7 is a time-programmable controller, and the PLC controller 7 can pre-set the start and stop time and interval of the water pump 10 according to the cleaning requirements, and control the hot air blower 5 to start for fifteen seconds after the water pump 10 is turned off.

[0031] The method of using the present embodiment is as follows: when in use, the air inlet 2 is used to connect the interior of the surveying instrument lens 1 and the interior of the round box 4 so that the humidity inside the two is consistent. When the humidity is high, fog will be condensed on the left side of the lens 101 inside the surveying instrument lens 1. The humidity sensor 8 detects the humidity in the round box 4 in real time and transmits the humidity value to the PLC controller 7. When the humidity value is higher than the preset value, the PLC controller 7 controls the hot air blower 5 to start automatically. The hot air blower 5 blows hot air into the round box 4. The hot air is filtered by the L-shaped filter 6 and then blown into the surveying instrument lens 1 through the air inlet 2. The blown hot air dries and defogs the left side of the lens 101. The hot air is then blown and defogged by the hot air blower 8. The air is discharged from the air outlet 3 to the upper inner part of the round box 4, and then to the right through the first one-way valve 11 and the rectangular vertical tube 13 into the horizontal tube 14, and then blown downward through the blowing head 15 to blow away the dust on the right side of the lens 101. When the humidity value is lower than the preset value, the PLC controller 7 controls the hot air blower 5 to turn off. By detecting the inner humidity and automatically blowing hot air for drying when the inner humidity exceeds the preset value, it is convenient to automatically and timely defog the inner side of the lens 101, thereby improving the degree of automation of defog. In combination with the method of using the discharged hot air to blow the outer side of the lens 101, the dust on the outer side of the lens 101 can be automatically blown away in one piece during defog.

[0032] The PLC controller 7 is used to pre-set the start and stop time and interval of the hot air blower 5 and the water pump 10 according to the on-site deep cleaning requirements. During deep cleaning, the preset start and stop time of the hot air blower 5 is after the start and stop time of the water pump 10. The start and stop interval of the water pump 10 is set to three seconds, and the start and stop interval of the hot air blower 5 is set to fifteen seconds. When the cleaning time is reached, the PLC controller 7 first controls the water pump 10 to start. The water pump 10 draws water from the water tank 9 through the L-shaped pipe, and pumps the water to the right through the second one-way valve 12 and the rectangular vertical pipe 13 to the horizontal pipe 14 in sequence. The water is sprayed out through the cleaning head 15 to rinse and clean the right side of the lens 101. After three seconds, the PLC The controller 7 controls the water pump 10 to turn off and controls the hot air blower 5 to turn on. Similarly, the movement process is the same as that of turning on the hot air blower 5 mentioned above. At this time, the hot air is blown out to the right side of the lens 101 through the cleaning head 15 again. The hot air blown out at this time can blow away and dry the water droplets remaining when the right side of the lens 101 is rinsed. When the closing time is reached, the PLC controller 7 controls the hot air blower 5 to turn off and perform normal humidity detection working state again or wait for the next cleaning time to perform deep cleaning again. By automatically rinsing and drying the outside of the lens 101 at a scheduled time, it is convenient to automatically and effectively clean the outside of the lens 101 in an integrated manner, thereby improving the comprehensiveness and effect of cleaning.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A defogging device for a surveying and mapping engineering surveying instrument lens, comprising a defogging device body mounted on a surveying and mapping instrument lens (1), wherein a lens (101) is fixedly connected to the inner side of the surveying and mapping instrument lens (1), and characterized in that: An air outlet (3) is provided on the top inner wall of the surveying and mapping instrument lens (1), and an air inlet (2) arranged obliquely is provided on the bottom inner wall of the surveying and mapping instrument lens (1), and both the air inlet (2) and the air outlet (3) are located on the left side of the lens (101); The demisting device body comprises an annular plate (102) fixedly mounted on the outside of the surveying instrument lens (1); a circular box (4) mounted and fixed on the right side of the annular plate (102) is movably mounted on the surveying instrument lens (1); the left side of the circular box (4) is arranged to be open; sealing rubber strips are bonded and fixed to the front inner wall and the rear inner wall of the circular box (4); the adjacent sides of the two sealing rubber strips are respectively in movably contact with the front side and the rear side of the surveying instrument lens (1); a PLC controller (7) is fixedly mounted on the left side of the bottom of the circular box (4); a humidity sensor (8) is fixedly connected to the bottom inner wall of the circular box (4); a hot air supply assembly is mounted on the bottom inner wall of the circular box (4); the hot air supply assembly and the humidity sensor (8) are both electrically connected to the PLC controller (7); A water supply component electrically connected to the PLC controller (7) is embedded and fixed on the top of the round box (4); the right side of the round box (4) is connected to the right side of the water supply component and is fixed with a one-way spray and blow cleaning component, which cooperates with the right side of the lens (101).

2. The lens defogging device for surveying and mapping engineering surveying and mapping instrument according to claim 1 is characterized by: The hot air supply assembly comprises an L-shaped filter (6) fixedly connected between the bottom inner wall and the right inner wall of the round box (4); a hot air blower (5) embedded and fixed on the bottom inner wall of the round box (4) is provided below the L-shaped filter (6); the bottom of the hot air blower (5) is an air inlet and is fixedly connected with breathable water-absorbent cotton (16); the top of the hot air blower (5) is an air outlet; and the hot air blower (5) is electrically connected to a PLC controller (7).

3. The lens defogging device for surveying and mapping engineering surveying and mapping instrument according to claim 2 is characterized in that: The water supply assembly comprises a water tank (9) embedded and fixed on the top of the round box (4); a water pump (10) electrically connected to the PLC controller (7) is fixedly installed on the right side of the water tank (9); a water inlet of the water pump (10) extends into the water tank (9) and is connected and fixedly connected to an L-shaped pipe.

4. The lens defogging device for surveying and mapping engineering surveying and mapping instrument according to claim 3 is characterized by: The one-way spray and blow-off assembly comprises a rectangular vertical tube (13) with a blocking structure at the top, the bottom end of the rectangular vertical tube (13) is connected and fixed with a horizontal tube (14) with blocking structures at both the front and rear ends, the bottom of the horizontal tube (14) is connected and fixed with a plurality of inclined blowing heads (15), the blowing heads (15) are located on the right side of the lens (101) and cooperate with the lens (101), the left side of the rectangular vertical tube (13) is connected and fixed with a first one-way valve (11) and a second one-way valve (12) with the right side as an outlet, the left side of the first one-way valve (11) is connected and fixed with the top of the right side of the round box (4), and the left side of the second one-way valve (12) is connected and fixed with the water outlet of the water pump (10).

5. The lens defogging device for surveying and mapping engineering surveying and mapping instrument according to claim 1, characterized in that: The air inlet (2) and the air outlet (3) are both located inside the round box (4).

6. The lens defogging device for surveying and mapping engineering surveying and mapping instrument according to claim 1, characterized in that: The left side of the round box (4) is provided with four thread grooves in an annular shape at equal intervals, and knob-type bolts are threadedly sleeved in the thread grooves, and the annular plate (102) is threadedly sleeved on the four knob-type bolts.

7. The lens defogging device for surveying and mapping engineering surveying and mapping instrument according to claim 1, characterized in that: The PLC controller (7) is a time-programmable controller.

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