A ventilation device for purifying kitchen fume

Abstract

The present invention provides a ventilation device for purifying kitchen oil smoke, comprising a hood, the hood is fixedly connected with a ventilation pipe, the ventilation pipe is outerly provided with a protective cover, a double-shaft motor is fixedly arranged inside the ventilation pipe, a fan blade is fixedly arranged at one end of the double-shaft motor, a rotating shaft is fixedly arranged at the other end, a filter element is sleeved on the rotating shaft, the filter element is fixedly arranged inside the ventilation pipe, a dust removal device for removing dust from the filter element is arranged on the rotating shaft, and a cleaning device for cleaning the inner wall of the ventilation pipe is arranged inside the ventilation pipe. The dust removal device is arranged at the filter element to ensure that the holes on the filter element will not be blocked by solid particles and dust, thereby ensuring that the ventilation device can ventilate stably, and when it is necessary to clean the oil stain on the inner wall of the ventilation pipe, the rotating groove drives the flexible brush to rotate to clean the inner wall of the ventilation pipe, thereby solving the problem that the oil stain inside the ventilation pipe is difficult to clean, and there is no need to disassemble the ventilation device for cleaning, which is very convenient.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation, in particular to ventilation equipment for purifying kitchen fume. Background Art

[0002] The smoke in the kitchen mainly contains oil substances. The existing kitchen fume purification ventilation equipment generally absorbs the oil substances in the smoke through the filter element, so that the smoke in the kitchen can be discharged to the standard. However, the smoke also contains some solid particles and dust. These solid particles and dust will adhere to the filter element with the smoke during the ventilation process, which is easy to cause the filter element to be blocked, so that the air volume that can pass through the filter element is reduced, and the stable operation of the ventilation device cannot be guaranteed;

[0003] In addition, the oil substances in the smoke and dust will also adhere to the inner wall of the ventilation duct in large quantities. When cleaning the inner wall of the ventilation duct, it is difficult for personnel to clean the inside due to the narrowness of the ventilation duct. The duct can only be disassembled or cleaned with other external tools, which is very cumbersome. Summary of the invention

[0004] The purpose of the present invention is to provide a ventilation device for purifying kitchen fumes to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A ventilation device for purifying kitchen fume, comprising a hood, the hood is fixedly connected with a ventilation pipe, the ventilation pipe is covered with a protective cover, a double-shaft motor is fixedly arranged inside the ventilation pipe, a fan blade is fixedly arranged at one end of the double-shaft motor, and a rotating shaft is fixedly arranged at the other end, a filter core is sleeved on the rotating shaft, and the filter core is fixedly arranged inside the ventilation pipe;

[0007] The rotating shaft is provided with a dust removal device for removing dust from the filter element;

[0008] A cleaning device for cleaning the inner wall of the ventilation pipe is arranged inside the ventilation pipe.

[0009] Preferably, the dust removal device comprises two rotating grooves fixedly arranged on a rotating shaft, and a scraping rubber strip is fixedly arranged on one side of the rotating groove close to the filter element.

[0010] Preferably, the cleaning device includes a spring inside the rotating groove, one end of the spring is fixedly arranged on the inner wall of the rotating groove, and the other end is fixedly connected to a flexible brush, the flexible brush is fixedly connected to a lifting rod, the lifting rod is fixedly connected to a ring, the part of the rotating shaft below the rotating groove is slidably sleeved with a sleeve, the end of the sleeve away from the rotating groove is fixedly connected to the lifting groove, the ring is slidably sleeved on the sleeve, the four corners of the lifting groove are fixedly arranged with synchronous electric telescopic rods, the synchronous electric telescopic rods are fixedly arranged on the inner wall of the hood, a spraying mechanism for spraying water on the inner wall of the ventilation pipe is arranged inside the protective hood, and a scraping mechanism capable of scraping the lifting groove is arranged on the lifting groove.

[0011] Preferably, the spraying mechanism includes an air tank and a water tank fixedly arranged between the ventilation pipe and the protective cover, the air tank is provided with an air vent on the top, a first piston is movably arranged inside the air tank, the first piston is fixedly connected with a piston rod, the end of the piston rod away from the first piston slides through the air tank and the hood in sequence and is fixed on the lifting slot, a partition is fixedly arranged inside the water tank to separate the water tank into a water storage chamber and a water spraying chamber, a one-way valve is fixedly arranged on the partition, a water inlet pipe connected to the water storage chamber is arranged on the water tank, a second piston is slidably arranged inside the water spraying chamber, a connecting pipe is connected to the side of the air tank away from the air vent, the end of the connecting pipe away from the air tank is connected to the water spraying chamber, a plurality of water spraying holes are opened in the ventilation pipe below the filter element, the water spraying holes are connected with a water supply pipe, and the water supply pipe is connected to the water spraying chamber.

[0012] Preferably, the scraping mechanism comprises two scraping strips slidably arranged inside the lifting slot, an elastic sheet is fixedly connected to the scraping strips, and one end of the elastic sheet away from the scraping strips is fixedly connected to the inner wall of the hood.

[0013] Preferably, the side wall of the lifting groove is provided with a plurality of discharge holes, a rear drainage groove is fixedly arranged on the inner wall of the hood close to the discharge hole, a water collecting groove is fixedly arranged on the outer side wall of the hood, and the hood is provided with a drainage hole connecting the drainage groove and the water collecting groove.

[0014] Preferably, a limiting rod is fixedly arranged inside the water spray chamber, and the limiting rod movably passes through the second piston.

[0015] Preferably, a temperature sensor is fixedly provided on the inner wall of the hood, a fire extinguishing agent tank is fixedly provided on the hood, the fire extinguishing agent tank is connected to a plurality of nozzles with electromagnetic valves, the nozzles pass through the hood and face directly below the lifting slot, and the temperature sensor is electrically connected to the electromagnetic valve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention is provided with a dust removal device at the filter element. During use, the dual-axis motor drives the rotating shaft to rotate, thereby driving the rotating slot on the rotating shaft to rotate, and the scraping rubber strip on the rotating slot scrapes off the solid particles and dust on the filter element, thereby ensuring that the holes on the filter element will not be blocked by solid particles and dust, ensuring that the ventilation device can ventilate stably;

[0018] 2. When it is necessary to clean the oil stains on the inner wall of the ventilation pipe, the lifting slot is lowered by the synchronous electric telescopic rod, and the lifting slot will drive the sleeve to descend, and the sleeve will drive the ring to descend, so as to pull out the flexible brush in the rotating slot. When the lifting plate descends, it will drive the piston rod to descend, and the first piston will press the gas into the water spray chamber, so that the second piston will squeeze the washing water in the water spray chamber upward, and the washing water will be sprayed from the water spray hole to the inner wall of the ventilation pipe, and then the flexible brush will be driven to rotate through the rotating slot to clean the inner wall of the ventilation pipe, thereby solving the problem that the oil stains inside the ventilation pipe are difficult to clean, and there is no need to disassemble the ventilation equipment for cleaning, which is very convenient;

[0019] 3. After cleaning the inner wall of the ventilation duct, the washed sewage will fall into the lifting groove. Start the synchronous electric telescopic rod again to make the lifting groove rise. The lifting groove will squeeze the two scraping strips, and the elastic sheet will deform to push the two scraping strips to slide to both sides of the lifting groove, scraping the sewage in the lifting groove to both sides of the lifting groove, and discharge it from the discharge hole into the drainage groove, and finally flow into the water collection groove, so as to scrape and clean the lifting groove, and also clean up the oil stains that fall in during normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the hood of the present invention;

[0022] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the spraying mechanism structure of the present invention;

[0024] Figure 5 It is a cross-sectional view of the spraying mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of the ventilation pipe of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the dust removal mechanism of the present invention;

[0027] Figure 8 It is a schematic diagram of the internal structure of the rotating tank of the present invention.

[0028] In the figure: 1, hood; 2, ventilation pipe; 3, protective cover; 4, dual-axis motor; 5, fan blade; 6, rotating shaft; 7, filter element; 8, rotating groove; 9, scraping rubber strip; 10, spring; 11, flexible brush; 12, lifting rod; 13, ring; 14, sleeve; 15, lifting groove; 16, synchronous electric telescopic rod; 17, gas tank; 18, water tank; 19, vent; 20, first piston; 21, Piston rod; 22. partition; 23. water storage chamber; 24. water spray chamber; 25. one-way valve; 26. water inlet pipe; 27. second piston; 28. connecting pipe; 29. ​​water spray hole; 30. water delivery pipe; 31. scraper; 32. elastic sheet; 33. discharge hole; 34. drainage trough; 35. water collecting trough; 36. drainage hole; 37. limit rod; 38. temperature sensor; 39. fire extinguishing agent tank; 40. nozzle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0030] See also Figure 1-Figure 8 , the present invention provides a technical solution:

[0031] Embodiment 1: A ventilation device for purifying kitchen oil fume, comprising a hood 1, a ventilation pipe 2 is fixedly connected to the hood 1, a protective cover 3 is arranged outside the ventilation pipe 2, a dual-axis motor 4 is fixedly arranged inside the ventilation pipe 2, a fan blade 5 is fixedly arranged at one end of the dual-axis motor 4, and a rotating shaft 6 is fixedly arranged at the other end, a filter element 7 is sleeved on the rotating shaft 6, and the filter element 7 is fixedly arranged inside the ventilation pipe 2. When the dual-axis motor 4 is energized, the fan blade 5 is driven to rotate, thereby sucking the oil fume from the hood 1 into the ventilation pipe 2. When the oil fume passes through the filter element 7, impurities such as oil stains will be filtered out by the filter element 7, and then discharged from the top of the ventilation pipe 2.

[0032] A dust removal device for removing dust from the filter element 7 is arranged on the rotating shaft 6. The dust removal device includes two rotating grooves 8 fixedly arranged on the rotating shaft 6. A scraping rubber strip 9 is fixedly arranged on one side of the rotating groove 8 close to the filter element 7. When the equipment is running, the rotation of the dual-axis motor 4 will drive the rotating shaft 6 to rotate, and the rotating shaft 6 will drive the rotating groove 8 to rotate. When the rotating groove 8 rotates, the scraping rubber strip 9 is prompted to scrape the side of the filter element 7 close to the air inlet to remove the filtered solid particles, dust and other impurities, and prevent the filter element 7 from being blocked.

[0033] A temperature sensor 38 is fixedly arranged on the inner wall of the hood 1, and a fire extinguishing agent tank 39 is fixedly arranged on the hood 1. The fire extinguishing agent tank 39 is connected to a plurality of nozzles 40 with electromagnetic valves. The nozzles 40 pass through the hood 1 and face directly below the lifting slot 15. The temperature sensor 38 is electrically connected to the electromagnetic valve. When the stove under the hood 1 catches fire, the temperature sensor 38 will sense the temperature. When the temperature reaches the set value, it will send a signal to the chip, and the chip will send a signal to the electromagnetic valve to control it to open. Then the fire extinguishing agent tank 39 will spray the fire extinguishing agent to the stove through the nozzle 40, thereby extinguishing the fire and realizing the automatic fire extinguishing function.

[0034] Embodiment 2: A cleaning device for cleaning the inner wall of the ventilation pipe 2 is provided inside the ventilation pipe 2, and the cleaning device includes a spring 10 inside the rotating groove 8, one end of the spring 10 is fixedly provided on the inner wall of the rotating groove 8, and the other end is fixedly connected with a flexible brush 11, and the flexible brush 11 is inside the rotating groove 8. When the flexible brush 11 is pulled out by an external force, the spring 10 will be stretched, and vice versa, the flexible brush 11 will be contracted and pulled back into the rotating groove 8, and the flexible brush 11 is fixedly connected with a lifting rod 12, and the lifting rod 12 is fixedly connected with a ring 13, and the sliding sleeve of the rotating shaft 6 below the rotating groove 8 is provided with a sleeve 14, and the diameter of the convex ring at the upper end of the sleeve 14 is larger than that of the ring 13 The diameter of the sleeve 14 is fixedly connected to the lifting groove 15 at one end away from the rotating groove 8. The ring 13 is slidably sleeved on the sleeve 14. The four corners of the lifting groove 15 are fixedly provided with synchronous electric telescopic rods 16. The synchronous electric telescopic rods 16 are fixedly provided on the inner wall of the hood 1. When the four synchronous electric telescopic rods 16 are extended and retracted, the lifting groove 15 will move up and down, and the sleeve 14 will be driven to move up and down at the same time. The downward movement of the sleeve 14 will pull the ring 13 downward, and the flexible brush 11 will be pulled out of the rotating groove 8. When the sleeve 14 moves upward, the flexible brush 11 is retracted into the rotating groove 8 by the pulling force of the spring 10, and the ring 13 will be pulled back to move upward.

[0035] The protective cover 3 is provided with a spraying mechanism for spraying water on the inner wall of the ventilation pipe 2. The spraying mechanism includes a gas tank 17 and a water tank 18 fixedly arranged between the ventilation pipe 2 and the protective cover 3. A vent hole 19 is provided on the top of the gas tank 17. A first piston 20 is movably arranged inside the gas tank 17. The vent hole 19 can ensure that the gas tank 17 above the first piston 20 is at the same air pressure as the outside air pressure. The first piston 20 is fixedly connected with a piston rod 21. The end of the piston rod 21 away from the first piston 20 slides through the gas tank 17 and the hood in sequence. 1 is fixed on the lifting groove 15, and a sealing rubber ring is arranged at the contact point between the gas tank 17 and the piston rod 21, which can prevent the gas in the gas tank 17 from leaking from the gap and does not affect the up and down movement of the piston rod 21. A partition 22 is fixedly arranged inside the water tank 18 to separate the water tank 18 into a water storage chamber 23 and a water spraying chamber 24, with the water storage chamber 23 at the top and the water spraying chamber 24 at the bottom. A one-way valve 25 is fixedly arranged on the partition 22, and the one-way valve 25 can allow the water in the water storage chamber 23 to enter the water spraying chamber 24, but the water in the water spraying chamber 24 The water in the water tank 18 cannot enter the water storage chamber 23. The water tank 18 is provided with a water inlet pipe 26 connected to the water storage chamber 23, which can replenish water for the water storage chamber 23 and communicate with the outside world at the same time to ensure that the air pressure in the water storage chamber 23 is the same as the air pressure on the upper part of the air tank 17. A second piston 27 is slidably arranged inside the water spray chamber 24, and a limiting rod 37 is fixedly arranged inside the water spray chamber 24. The limiting rod 37 movably passes through the second piston 27. The limiting rod 37 can limit the second piston 27 to move up and down, and the limiting rod 37 and the second piston 2 7 is provided with a sealing rubber ring, the gas tank 17 is connected to the side away from the vent hole 19 with a connecting pipe 28, the end of the connecting pipe 28 away from the gas tank 17 is connected to the water spray chamber 24, the connecting pipe 28 is arranged at the bottom of the gas tank 17 and the water tank 18, the ventilation pipe 2 is provided with a plurality of water spray holes 29 below the filter element 7, the water spray holes 29 are connected with a water delivery pipe 30, the water delivery pipe 30 is connected with the water spray chamber 24, the height of the water delivery pipe 30 connecting with the water spray chamber 24 is the same as the height of the water spray hole 29, and is close to the bottom of the partition 22.

[0036] Embodiment 3: The lifting groove 15 is provided with a scraping mechanism capable of scraping the lifting groove 15. The scraping mechanism includes two scraping strips 31 slidably arranged inside the lifting groove 15. The scraping strips 31 are fixedly connected with elastic sheets 32. The end of the elastic sheet 32 ​​away from the scraping strips 31 is fixedly connected to the inner wall of the hood 1. The two scraping strips 31 are arranged on both sides of the sleeve 14. When the lifting groove 15 descends, the scraping strips 31 are returned to the side of the sleeve 14 by the elastic force of the elastic sheet 32. When the lifting groove 15 rises, The elastic sheet 32 ​​is squeezed to squeeze the scraper strip 31 away from the sleeve 14, so as to scrape the inside of the lifting groove 15. A plurality of discharge holes 33 are provided on the side wall of the lifting groove 15. The side of the lifting groove 15 close to the discharge hole 33 is lower to facilitate the sewage to flow out into the drainage groove 34. A rear drainage groove 34 is fixedly provided on the inner wall of the hood 1 close to the discharge hole 33. A water collecting groove 35 is fixedly provided on the outer side wall of the hood 1. The hood 1 is provided with a drainage hole 36 connecting the drainage groove 34 and the water collecting groove 35.

[0037] Working principle: When the kitchen needs ventilation, the dual-axis motor 4 is started, and the dual-axis motor 4 drives the fan blades 5 to rotate, so that the oil smoke is sucked into the ventilation pipe 2 from the bottom of the hood 1, and is discharged from the top of the ventilation pipe 2 after being filtered by the filter element 7. At the same time, the dual-axis motor 4 also drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the rotating groove 8 to rotate, and the rotating groove 8 drives the scraping rubber strip 9 to rotate and scrape on the filter element 7 to scrape off the solid particles and dust on the filter element 7;

[0038] When it is necessary to clean the oil stains on the inner wall of the ventilation pipe 2, the synchronous electric telescopic rod 16 is started to make the lifting groove 15 descend, and the lifting groove 15 will drive the sleeve 14 to slide downward, and the sleeve 14 will pull the ring 13 to move the lifting rod 12 downward, and pull the flexible brush 11 out of the rotating groove 8. The flexible brush 11 will fit the inner wall of the ventilation pipe 2. When the lifting groove 15 descends, it will drive the piston rod 21 to slide downward, and the piston rod 21 will pull the first piston 20 to slide downward in the gas tank 17, and the first piston 20 squeezes the gas through the connecting pipe 28 into the water spray chamber 24. In the process, the second piston 27 is squeezed to move upward, and the second piston 27 squeezes the washing water above it and sprays it from the water spray hole 29 to the inner wall of the ventilation pipe 2. When the lifting groove 15 descends, the two scraping strips 31 in the lifting groove 15 are pulled back to the middle of the lifting groove 15 by the rebound force of the elastic sheet 32. Then the double-axis motor 4 is started, and the rotating groove 8 rotates to drive the flexible brush 11 to rotate on the inner wall of the ventilation pipe 2, thereby cleaning the oil stains on the inner wall. The cleaned sewage falls into the lifting groove 15 and is discharged into the drainage groove 34 and the water collection groove 35 through the discharge hole 33;

[0039] After washing, turn off the dual-axis motor 4, and then start the synchronous electric telescopic rod 16 to contract, so that the lifting groove 15 rises, the sleeve 14 will slide upward, and the flexible brush 11 will be pulled back into the rotating groove 8 by the spring 10. At the same time, the piston rod 21 moves upward to move the first piston 20 upward, and the gas in the water spray chamber 24 will enter the gas tank 17. The second piston 27 slides downward, and the water in the water storage chamber 23 will enter the water spray chamber 24 through the one-way valve 25 for replenishment. When the lifting groove 15 rises, the two scraping strips 31 will be squeezed to slide to both sides, thereby scraping off the sewage in the lifting groove 15.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation device for purifying kitchen fume, comprising a hood (1), a ventilation pipe (2) fixedly connected to the hood (1), a protective cover (3) disposed on the outer cover of the ventilation pipe (2), characterized in that: A double-shaft motor (4) is fixedly arranged inside the ventilation pipe (2); a fan blade (5) is fixedly arranged at one end of the double-shaft motor (4); a rotating shaft (6) is fixedly arranged at the other end; a filter core (7) is sleeved on the rotating shaft (6); and the filter core (7) is fixedly arranged inside the ventilation pipe (2); The rotating shaft (6) is provided with a dust removal device for removing dust from the filter element (7); The ventilation pipe (2) is provided with a cleaning device for cleaning the inner wall thereof; The dust removal device comprises two rotating grooves (8) fixedly arranged on the rotating shaft (6), and a scraping rubber strip (9) is fixedly arranged on one side of the rotating groove (8) close to the filter core (7); The cleaning device comprises a spring (10) inside the rotating groove (8), one end of the spring (10) is fixedly arranged on the inner wall of the rotating groove (8), and the other end is fixedly connected to a flexible brush (11), the flexible brush (11) is fixedly connected to a lifting rod (12), and the lifting rod (12) is fixedly connected to a ring (13), and a sleeve (14) is slidably sleeved on the part of the rotating shaft (6) below the rotating groove (8), and the sleeve (14) is away from the rotating groove (8). One end is fixedly connected with a lifting groove (15), the circular ring (13) is slidably sleeved on the sleeve (14), the four corners of the lifting groove (15) are fixedly provided with synchronous electric telescopic rods (16), the synchronous electric telescopic rods (16) are fixedly provided on the inner wall of the hood (1), a spraying mechanism for spraying water on the inner wall of the ventilation pipe (2) is provided inside the protective cover (3), and a scraping mechanism capable of scraping the lifting groove (15) is provided on the lifting groove (15).

2. A ventilation device for purifying kitchen fume according to claim 1, characterized in that: The spraying mechanism comprises an air tank (17) and a water tank (18) fixedly arranged between the ventilation pipe (2) and the protective cover (3); a vent hole (19) is provided on the top of the air tank (17); a first piston (20) is movably arranged inside the air tank (17); the first piston (20) is fixedly connected to a piston rod (21); an end of the piston rod (21) away from the first piston (20) slides through the air tank (17) and the machine cover (1) in sequence and is then fixed on the lifting groove (15); a partition (22) is fixedly arranged inside the water tank (18) to separate the water tank (18) into a water storage chamber (23) and a water spray chamber (24). A one-way valve (25) is fixedly arranged on the partition (22), a water inlet pipe (26) connected to the water storage chamber (23) is arranged on the water tank (18), a second piston (27) is slidably arranged inside the water spray chamber (24), a connecting pipe (28) is connected to the side of the gas tank (17) away from the vent hole (19), and the end of the connecting pipe (28) away from the gas tank (17) is connected to the water spray chamber (24), and a plurality of water spray holes (29) are opened on the ventilation pipe (22) below the filter element (7), and the water spray holes (29) are connected to a water delivery pipe (30), and the water delivery pipe (30) is connected to the water spray chamber (24).

3. The ventilation device for purifying kitchen fume according to claim 1, characterized in that: The scraping mechanism comprises two scraping strips (31) slidably arranged inside the lifting groove (15), an elastic sheet (32) being fixedly connected to the scraping strips (31), and one end of the elastic sheet (32) away from the scraping strips (31) being fixedly connected to the inner wall of the hood (1).

4. A ventilation device for purifying kitchen fume according to claim 3, characterized in that: The side wall of the lifting groove (15) is provided with a plurality of discharge holes (33); a rear drainage groove (34) is fixedly provided on the inner wall of the hood (1) on the side close to the discharge hole (33); a water collecting groove (35) is fixedly provided on the outer side wall of the hood (1); and the hood (1) is provided with a drainage hole (36) for connecting the drainage groove (34) and the water collecting groove (35).

5. The ventilation device for purifying kitchen fume according to claim 2, characterized in that: A limiting rod (37) is fixedly arranged inside the water spray chamber (24), and the limiting rod (37) movably passes through the second piston (27).

6. The ventilation device for purifying kitchen fume according to claim 1, characterized in that: A temperature sensor (38) is fixedly arranged on the inner wall of the hood (1); a fire extinguishing agent tank (39) is fixedly arranged on the hood (1); the fire extinguishing agent tank (39) is connected to a plurality of nozzles (40) with electromagnetic valves; the nozzles (40) pass through the hood (1) and face directly below the lifting slot (15); the temperature sensor (38) is electrically connected to the electromagnetic valve.

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