CN111212552B - An embedded cooling device in a server room - Google Patents

Abstract

The invention discloses an embedded heat dissipation device for a server room, comprising a work box and an annular air suction cavity located in the work box and opened upward, wherein the annular air suction cavity is fixedly provided with which can filter the wind entering the annular air suction cavity The annular filter plate, the working box is fixed with a first cavity located on the lower side of the annular suction cavity and communicated with the annular suction cavity. When the heat transfer rod of the invention monitors that the temperature in the machine room rises to a certain value, it will switch the suction fan blades to the high-speed mode to speed up the heat dissipation of the machine room. The condenser of the invention will start to dissipate heat in the machine room. When the threshold value is reached, the alarm device of the present invention will be connected to the alarm system, prompting the relevant personnel, and sprinkle the dry powder in the present invention to prevent the occurrence of fire and cause heavy losses.

Description

An embedded cooling device in a server room

technical field

The invention relates to the technical field of servers, in particular to an embedded cooling device in a server room.

Background technique

For computer network servers, the operating environment is very important. The environment referred to mainly includes operating temperature and air humidity. The temperature and humidity requirements of the operating environment for power equipment are usually relatively strict. In the case of high temperature, the overall temperature of the network server and its power supply will continue to rise. If the temperature tolerance threshold is exceeded, the equipment will be damaged to varying degrees, and even cause a fire in severe cases. Some existing cooling equipment, The heat dissipation effect is not ideal. Therefore, an embedded heat dissipation device in a server room is urgently needed to solve the above problems. In view of the above shortcomings, the present invention makes improvements.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an embedded cooling device in a server room, which overcomes the above problems.

The present invention is achieved through the following technical solutions.

An embedded cooling device for a server room, comprising a work box and an annular air suction cavity located in the work box and opening upward, wherein the annular air suction cavity is fixed with air that can enter the annular air suction cavity. The annular filter plate for filtering, the working box is fixed with a first cavity located on the lower side of the annular suction cavity and communicated with the annular suction cavity, and the inner wall of the upper side of the first cavity is rotatably arranged. There is a first rotating shaft, and the first rotating shaft is fixed with a first gear, a second gear, and a suction fan blade in sequence from top to bottom. The rotation of the suction fan blade can suck the outside wind through the annular suction cavity. In the room, the working box is fixed with a differential rotation device that can make the first shaft rotate at two different speeds, and the working box is fixed with a second cavity located on the right side of the first cavity. A piston is slidably installed in the second cavity, and a heat-conducting rod located on the lower side of the second cavity and extending upward into the second cavity is fixed on the lower end surface of the working box. The rod is located on the lower side of the piston, the second cavity on the lower side of the piston is filled with heat-sensitive gas, and the heat-conducting rod can transmit the temperature in the machine room in real time. A first chute on the left side of the cavity and communicated with the second cavity, a first circular slider is slidably arranged in the first chute, and the left end surface of the first circular slider is connected to the second cavity. The left cavity wall of a chute is connected by a first compression spring, and an alarm device capable of issuing an alarm is fixed in the working box. When the piston slides up to contact with the inner wall of the upper side of the second cavity, the The alarm device activates the alarm.

Further, the differential rotating device includes a third cavity located on the right side of the first cavity and communicated with the first cavity, and the working box is fixedly provided on the third cavity. A second chute on the side and communicated with the third cavity, an electromagnet is fixed on the right cavity wall of the second chute, and the electromagnet is electrically connected to the first circular slider. When the first circular slider stops being squeezed, the electromagnet is energized, a magnetic slider located on the left side of the electromagnet is slidably arranged in the second chute, and the left end surface of the magnetic slider is connected to the magnetic slider. The left cavity wall of the second chute is connected by a first tension spring, a motor located in the third cavity is fixed on the lower end surface of the magnetic slider, and a motor shaft is rotated on the lower end surface of the motor. The motor shaft is provided with a downwardly opening keyway, the motor shaft is fixed with a third gear that meshes with the first gear, and the working box is fixed with a keyway located on the upper side of the second chute and connected to the second chute. A third chute communicated with the second chute, a second circular slide block partially located in the second chute is slidably arranged in the third chute, and the upper end surface of the second circular slide block is slidable. It is connected with the upper inner wall of the third chute through a second compression spring, and when the third gear meshes with the first gear, the rotation speed of the first rotating shaft is relatively slow.

Further, a fourth cavity located on the left side of the first cavity and communicated with the first cavity is fixed in the working box, and a fourth cavity is fixed in the working box. A fourth chute on the upper side and communicated with the fourth cavity, a first sliding block is slidably arranged in the fourth chute, and the left end surface of the first sliding block is connected to the left cavity wall of the fourth chute Connected by a fourth chute, the left end surface of the first sliding block and the upper end surface of the second circular sliding block are connected by a first pull rope, and the lower end surface of the first sliding block is rotated and provided with a fourth rotating shaft. A pulley is fixed on the fourth rotating shaft, the motor shaft is connected with the fourth rotating shaft through the pulley, and a fourth gear is fixed on the fourth rotating shaft and located on the left side of the second gear. When the first pulling rope is loosened, the first sliding block slides to the right until it abuts against the right cavity wall of the fourth chute, and the fourth gear meshes with the second gear, so that the fourth A rotating shaft rotates at a relatively fast speed, and a condenser located on the lower side of the fourth cavity and on the left side of the first cavity is fixed in the working box. When the electromagnet is energized, the condenser is energized. The device starts to discharge cold air to cool down.

Further, a fifth cavity that is located on the right side of the second cavity and opens downward is fixed in the working box, the fifth cavity is filled with dry powder for fire extinguishing, and the working box is fixed inside. There is a fifth chute located at the rear side of the fifth cavity and communicated with the fifth cavity, and a closing plate that can close the lower opening of the fifth cavity is slidably arranged in the fifth chute, The rear end surface of the closing plate and the rear cavity wall of the fifth chute are connected by a third compression spring, and a working box is fixedly arranged on the lower side of the third cavity and communicated with the third cavity. A sixth chute, a second slider is slidably arranged in the sixth chute, the left end face of the second slider is connected with the left cavity wall of the sixth chute by a second tension spring, the second The upper end face of the slider is rotated with a second rotating shaft located in the third cavity, a reel is fixed on the second rotating shaft, and the reel and the rear end surface of the closing plate pass through a second pulling rope connection, the second rotating shaft is fixed with a first bevel gear located on the upper side of the reel, when the reel rotates, the closing plate is pulled back to open the bottom of the fifth cavity mouth, so that the dry powder in the fifth cavity falls to prevent fire.

Further, the alarm device includes a sixth cavity located on the right side of the third cavity, and the right cavity wall of the sixth cavity is rotated and provided with a third rotating shaft extending to the left into the third cavity , the third rotating shaft is fixed with a second bevel gear and a third bevel gear located in the third cavity in sequence from right to left, and the third rotating shaft is fixed with a second bevel gear located in the sixth cavity The fifth gear inside, the rear inner wall of the sixth cavity is slidably provided with a rack located on the rear side of the fifth gear and meshing with the fifth gear, and the upper end surface of the rack is in contact with the sixth cavity. The inner wall of the upper side of the cavity is connected by a third tension spring, the upper end surface of the rack and the right end surface of the second slider are connected by a third pulling rope, and the inner wall of the lower side of the sixth cavity is fixed with an alarm that can alarm When the rack is in contact with the alarm, the alarm will sound an alarm, and the third pull rope will pull the second slider to slide to the right to the right cavity wall of the sixth chute In contact, the first bevel gear meshes with the second bevel gear.

Further, the piston is provided with an upwardly open T-shaped cavity, a T-shaped rotating shaft extending upward into the third cavity is rotated in the T-shaped cavity, and a T-shaped rotating shaft is fixed on the T-shaped rotating shaft. For the fourth bevel gear in the third cavity, when the piston slides up to abut against the inner wall of the upper side of the second cavity, the T-shaped rotating shaft is clamped into the key groove, and the fourth A bevel gear meshes with the third bevel gear.

Beneficial effects of the present invention: The present invention is a heat dissipation device that can adjust the rotational speed of the cooling fan blades in the computer room. When the heat conduction rod of the present invention monitors that the temperature in the computer room rises to a certain value, it will switch the suction fan blades to high Speed mode, to speed up the heat dissipation of the machine room, the condenser of the present invention will start to dissipate heat to the machine room, when the temperature rises to the threshold, the alarm device of the present invention will be connected to the alarm system, prompt the relevant personnel, and put the dry powder in the present invention Sprinkle to prevent fire and cause heavy losses.

Description of drawings

The present invention will be described in detail below in conjunction with Fig. 1-4, wherein, for the convenience of description, the orientations mentioned below are now specified as follows: the up-down, left-right, front-rear directions mentioned below are consistent with the up-down, left-right, front-rear directions of the projection relationship of Fig. 1 itself.

1 is a schematic diagram of the overall structure of an embedded cooling device in a server room according to the present invention;

Fig. 2 is the structural representation at A-A in Fig. 1;

Fig. 3 is the structural representation at B in Fig. 1;

FIG. 4 is a schematic diagram of the structure at C in FIG. 1 .

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and examples, and the modes of the present invention include but are not limited to the following examples.

As shown in Figures 1-4, an embedded cooling device in a server room includes a work box 10 and an annular air suction cavity 21 located in the work box 10 and opening upward, and the annular air suction cavity 21 is fixed with a An annular filter plate 22 that can filter the air entering the annular suction cavity 21 is fixed in the working box 10 and is located on the lower side of the annular suction cavity 21 and communicated with the annular suction cavity 21 The first cavity 20, the upper inner wall of the first cavity 20 is rotatably provided with a first rotating shaft 23, and the first rotating shaft 23 is sequentially fixed with a first gear 51, a second gear 50, A suction fan blade 49, the rotation of the suction fan blade 49 can suck the outside air into the room through the annular suction cavity 21, and the working box 10 is fixed with the first rotating shaft 23 at two different rotational speeds. The rotating differential rotation device 71, the working box 10 is fixedly provided with a second cavity 43 located on the right side of the first cavity 20, the second cavity 43 is slidably provided with a piston 39, the The lower end face of the working box 10 is fixedly provided with a heat conducting rod 41 located on the lower side of the second cavity 43 and extending upward into the second cavity 43 . The heat conducting rod 41 is located on the lower side of the piston 39 . The second cavity 43 on the lower side of the piston 39 is filled with heat-sensitive gas, and the heat transfer rod 41 can transmit the temperature in the machine room in real time. A first chute 58 communicated with the second cavity 43, a first circular slider 56 is slidably arranged in the first chute 58, and the left end surface of the first circular slider 56 is connected to the first circular slider 56. The left cavity wall of a chute 58 is connected by a first compression spring 57 , an alarm device 72 capable of issuing an alarm is fixed in the working box 10 , when the piston 39 slides up to the upper side of the second cavity 43 When the inner wall abuts, the alarm device 72 activates an alarm.

Beneficially, the differential rotation device 71 includes a third cavity 68 located on the right side of the first cavity 20 and communicated with the first cavity 20 . The second chute 26 on the upper side of the third cavity 68 and communicated with the third cavity 68 , the right cavity wall of the second chute 26 is fixed with an electromagnet 31 , and the electromagnet 31 is connected to the second chute 26 . A circular slider 56 is connected with an electrical signal. When the first circular slider 56 stops being squeezed, the electromagnet 31 is energized, and the second chute 26 is slidably disposed on the electromagnet 31 . The magnetic slider 25 on the left side, the left end surface of the magnetic slider 25 is connected with the left cavity wall of the second chute 26 through the first tension spring 24, and the lower end surface of the magnetic slider 25 is fixed on the The motor 48 in the third cavity 68 is provided with a motor shaft 69 on the lower end surface of the motor 48. The motor shaft 69 is provided with a downwardly opening keyway 45, and the motor shaft 69 is fixed on the motor shaft 69. The third gear 47 meshed with the first gear 51, the working box 10 is fixed with a third chute 28 located on the upper side of the second chute 26 and communicated with the second chute 26. A second circular sliding block 30 partially located in the second sliding groove 26 is slidably arranged in the third sliding groove 28 , and the upper end surface of the second circular sliding block 30 passes through the upper inner wall of the third sliding groove 28 The second compression spring 29 is connected, and when the third gear 47 meshes with the first gear 51 , the rotation speed of the first shaft 23 is relatively slow.

Beneficially, a fourth cavity 12 located on the left side of the first cavity 20 and communicated with the first cavity 20 is fixed inside the working box 10 , and a fourth cavity 12 is fixed inside the working box 10 and is located on the left side of the first cavity 20 . A fourth chute 19 on the upper side of the fourth cavity 12 and communicated with the fourth cavity 12, a first sliding block 18 is slidably arranged in the fourth sliding groove 19, and the left end of the first sliding block 18 The left end surface of the first sliding block 18 is connected with the left cavity wall of the fourth sliding groove 19 through the fourth sliding groove 19, and the left end surface of the first sliding block 18 is connected with the upper end surface of the second circular sliding block 30 through the first pulling rope 16, so The lower end surface of the first sliding block 18 is rotatably provided with a fourth rotating shaft 14 , the fourth rotating shaft 14 is fixedly provided with a pulley 15 , and the motor shaft 69 is connected with the fourth rotating shaft 14 through the pulley 15 . A fourth gear 13 is fixed on the fourth rotating shaft 14 and located on the left side of the second gear. When the first pull rope 16 is loosened, the first slider 18 slides to the right until it is in line with the second gear. The four sliding grooves 19 are in contact with the right cavity wall, and the fourth gear 13 meshes with the second gear 50, so that the first rotating shaft 23 rotates at a relatively fast speed. On the lower side of the fourth cavity 12 and the condenser 11 on the left side of the first cavity 20, when the electromagnet 31 is energized, the condenser 11 starts to discharge cold air to cool down.

Beneficially, a fifth cavity 38 located on the right side of the second cavity 43 and opening downward is fixed in the working box 10 . The fifth cavity 38 is filled with dry powder for fire extinguishing. The working box 10 is fixedly provided with a fifth chute 52 located on the rear side of the fifth cavity 38 and communicated with the fifth cavity 38 . The closing plate 40 of the lower opening of the five cavities 38, the rear end surface of the closing plate 40 is connected with the rear cavity wall of the fifth chute 52 through a third compression spring 53, and the working box 10 is fixed with A sixth chute 59 on the lower side of the three cavities 68 and communicated with the third cavity 68, a second sliding block 60 is slidably arranged in the sixth sliding groove 59, and the left end surface of the second sliding block 60 is connected to the The left cavity wall of the sixth chute 59 is connected by a second tension spring 61 , and the upper end surface of the second slider 60 is rotated with a second shaft 65 located in the third cavity 68 . A reel 62 is fixed on the rotating shaft 65 , and the reel 62 is connected with the rear end surface of the closing plate 40 through a second pulling rope 54 , and a reel 62 is fixed on the second rotating shaft 65 . The first bevel gear 64 on the upper side, when the reel 62 rotates, pulls the closing plate 40 backward to open the lower opening of the fifth cavity 38, so that the Dry powder falls, preventing fire.

Beneficially, the alarm device 72 includes a sixth cavity 34 located on the right side of the third cavity 68 , and the right cavity wall of the sixth cavity 34 is rotated to extend to the left to the third cavity 68 The third rotating shaft 66 inside, the second bevel gear 67 and the third bevel gear 63 located in the third cavity 68 are fixed on the third rotating shaft 66 sequentially from right to left, the third rotating shaft 66 A fifth gear 36 located in the sixth cavity 34 is fixed thereon, and the inner wall on the rear side of the sixth cavity 34 is slidably arranged behind the fifth gear 36 and meshes with the fifth gear 36 The rack 35, the upper end surface of the rack 35 and the upper inner wall of the sixth cavity 34 are connected by the third tension spring 33, the upper end surface of the rack 35 and the right end surface of the second slider 60 pass through The third pull rope 32 is connected, and the inner wall of the lower side of the sixth cavity 34 is fixed with an alarm 37 capable of alarming. When the rack 35 is in contact with the alarm 37, the alarm 37 will issue an alarm , the third pulling rope 32 pulls the second sliding block 60 to the right to abut against the right cavity wall of the sixth sliding slot 59 , and the first bevel gear 64 meshes with the second bevel gear 67 .

Beneficially, the piston 39 is provided with a T-shaped cavity 55 that opens upward, and the T-shaped cavity 55 is rotatably provided with a T-shaped rotating shaft 46 extending upward into the third cavity 68 . The T-shaped rotating shaft The fourth bevel gear 44 located in the third cavity 68 is fixed on the 46. When the piston 39 slides up to contact with the inner wall of the upper side of the second cavity 43, the T-shaped shaft 46 The fourth bevel gear 44 is engaged with the third bevel gear 63 by being snapped into the key slot 45 .

The sequence of mechanical actions of the whole device:

The initial state of the present invention is: the first tension spring 24 is in a relaxed state, the electromagnet 31 is not energized, the third gear 47 meshes with the first gear 51, the second circular slider 30 is partially located in the second chute 26, The second compression spring 29 is in a relaxed state, the first pulling rope 16 is in a tensioned state, the fourth compression spring 17 is in a compressed state, the fourth gear 13 is not meshed with the second gear 50, the condenser 11 is not activated, and the fourth tension The spring 42 is in a relaxed state, the first compression spring 57 is in a compressed state, the first circular slider 56 is located in the first chute 58, the fourth bevel gear 44 is not meshed with the third bevel gear 63, and the first bevel gear 64 is in contact with the The second bevel gear 67 is not engaged, the third tension spring 33 is in a relaxed state, the third tension spring 32 is in a relaxed state, the second tension spring 61 is in a relaxed state, the second tension spring 54 is not tensioned, and the third compression spring 53 is a relaxed state, and the closing plate 40 closes the lower opening of the fifth cavity 38;

1. The starter motor 48 drives the motor shaft 69 to rotate, and the motor shaft 69 rotates to drive the third gear 47 to rotate. Since the third gear 47 meshes with the first gear 51, the rotation of the third gear 47 drives the rotation of the first gear 51, and the rotation of the first gear 51 drives the rotation of the first gear 51. The rotation of the first shaft 23, the rotation of the first shaft 23 drives the rotation of the suction fan blades 49, and the rotation of the suction fan blades 49 sucks the outside air into the annular suction cavity 21, and after being filtered by the annular filter plate 22, it is blown out through the first cavity 20, Cooling the server room;

2. The heat conduction rod 41 monitors the temperature in the server room in real time, and transfers the temperature in the machine room to the second cavity 43 to expand the heat-sensitive gas in the second cavity 43. If the heat conduction rod 41 monitors that the temperature in the machine room rises , the expansion of the gas in the second cavity 43 pushes the piston 39 to slide upward, and the piston 39 slides upward to stretch the fourth tension spring 42. When the piston 39 slides upward to stop squeezing the first circular slider 56, the first compression The spring 57 resets and ejects the first circular slider 56. When the first circular slider 56 is pushed out, the electromagnet 31 is energized to attract the magnetic slider 25 to slide to the right, and the magnetic slider 25 slides to the right to drive the motor 48 to move to the right. Slide to the right, the motor 48 slides to the right to drive the motor shaft 69 to slide to the right, and the motor shaft 69 slides to the right to drive the third gear 47 to slide to the right, so that the third gear 47 is disengaged from the first gear 51;

3. When the electromagnet 31 is energized, the condenser 11 starts to cool down and dissipate heat in the machine room;

4. When the magnetic slider 25 slides to the right to contact the electromagnet 31, the second circular slider 30 is squeezed to slide upward into the third sliding slot 28, and the second compression spring 29 is squeezed to make the first pull rope 16 is loosened, the first pulling rope 16 is loosened so that the fourth compression spring 17 is reset, the fourth compression spring 17 is reset, the first sliding block 18 slides to the right, and the sliding of the first sliding block 18 to the right drives the fourth rotating shaft 14 to slide to the right. , the fourth rotating shaft 14 slides to the right and drives the fourth gear 13 to slide to the right. When the first slider 18 is in contact with the right cavity wall of the fourth chute 19, the fourth gear 13 meshes with the second gear 50. Since the motor shaft 69 and the fourth shaft 14 are connected through the pulley 15, the rotation of the motor shaft 69 drives the rotation of the fourth shaft 14, the rotation of the fourth shaft 14 drives the rotation of the fourth gear 13, and the rotation of the fourth gear 13 drives the rotation of the second gear 50, The rotation of the second gear 50 drives the first rotating shaft 23 to rotate at a faster speed, the rotation of the first rotating shaft 23 drives the rotation of the suction fan blades 49, and the rotation of the suction fan blades 49 increases the air volume entering the annular suction cavity 21, so as to increase the air volume in the machine room. to accelerate heat dissipation;

5. If the temperature in the machine room continues to rise, when the piston 39 slides up to abut against the upper cavity wall of the second cavity 43, the T-shaped shaft 46 snaps into the keyway 45, and the piston 39 slides upward to drive the T-shaped shaft 46 to slide upward, and the T-shaped shaft 46 slides upward. The shaft 46 slides upward to drive the fourth bevel gear 44 to slide upward, the fourth bevel gear 44 meshes with the third bevel gear 63, the rotation of the motor shaft 69 drives the rotation of the T-shaped shaft 46, and the rotation of the T-shaped shaft 46 drives the rotation of the fourth bevel gear 44 The rotation of the fourth bevel gear 44 drives the rotation of the third bevel gear 63, the rotation of the third bevel gear 63 drives the rotation of the third shaft 66, and the rotation of the third shaft 66 drives the rotation of the fifth gear 36. The tooth surface meshes, the fifth gear 36 rotates and drives the rack 35 to slide downward, the rack 35 slides down and tightens the third pull rope 32, the third pull rope 32 is pulled tight and pulls the second slider 60 to slide to the right, the first The two sliders 60 slide to the right to drive the second shaft 65 to slide to the right. When the rack 35 slides down to contact the alarm 37, the alarm 37 sends out an electrical signal to issue an alarm;

6. When the rack 35 is in contact with the alarm 37, the second slider 60 is in contact with the right cavity wall of the sixth chute 59, the first bevel gear 64 is meshed with the second bevel gear 67, and the third shaft 66 rotates to drive the second The rotation of the bevel gear 67, the rotation of the second bevel gear 67 drives the rotation of the first bevel gear 64, the rotation of the first bevel gear 64 drives the rotation of the second shaft 65, the rotation of the second shaft 65 drives the rotation of the reel 62, and the rotation of the reel 62 pulls the Tighten the second pull rope 54, the second pull rope 54 is pulled so that the closing plate 40 slides backward, and the lower opening of the fifth cavity 38 is opened, so that the dry powder in the fifth cavity 38 falls into the machine room, preventing the inside of the machine room. Excessive temperature leads to fire, resulting in heavy losses;

7. After the use is completed, the present invention restores the original position and continues to dissipate heat in the machine room.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement it, but not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (1)

1. The utility model provides an embedded heat abstractor of server computer lab, includes the work box and is located the open-ended annular chamber that induced drafts that just makes progress in the work box, the annular intracavity that induced drafts has set firmly and to get into the annular is induced drafted the wind of intracavity and is carried out filterable annular filter plate, the work box has set firmly and is located the annular chamber downside that induced drafts and with the annular first cavity that induced drafts the chamber intercommunication, first cavity upside inner wall rotates and is equipped with first pivot, top-down has set firmly first gear, second gear, induced draft fan leaf in proper order in the first pivot, its characterized in that: the suction fan blade rotates to suck outside air into the room through the annular suction cavity, a differential rotation device which can enable the first rotating shaft to rotate at two different rotating speeds is fixedly arranged in the working box, a second cavity which is positioned on the right side of the first cavity is fixedly arranged in the working box, a piston is arranged in the second cavity in a sliding mode, a heat conducting rod which is positioned on the lower side of the second cavity and extends upwards into the second cavity is fixedly arranged on the lower end face of the working box, the heat conducting rod is positioned on the lower side of the piston, the second cavity on the lower side of the piston is filled with thermosensitive gas, the heat conducting rod can transmit the temperature in a machine room in real time, a first sliding groove which is positioned on the left side of the second cavity and communicated with the second cavity is fixedly arranged in the working box, a first circular sliding block is arranged in the first sliding groove in a sliding mode, the left end face of the first circular sliding block is connected with the left cavity wall of the first sliding groove through a, an alarm device capable of giving out an alarm is fixedly arranged in the working box, and when the piston slides upwards to be abutted against the inner wall of the upper side of the second cavity, the alarm device starts to alarm; the differential rotation device comprises a third cavity which is positioned at the right side of the first cavity and communicated with the first cavity, a second chute which is positioned at the upper side of the third cavity and communicated with the third cavity is fixedly arranged in the working box, the right cavity wall of the second chute is fixedly provided with an electromagnet, the electromagnet is in electric signal connection with the first circular slide block, when the first circular slide block stops being extruded, the electromagnet is electrified, a magnetic slide block positioned at the left side of the electromagnet is arranged in the second chute in a sliding manner, the left end surface of the magnetic slide block is connected with the left cavity wall of the second chute through a first tension spring, the lower end surface of the magnetic slide block is fixedly provided with a motor positioned in the third cavity, the lower end surface of the motor is rotatably provided with a motor shaft, a key groove with a downward opening is arranged in the motor shaft, and a third gear meshed with the first gear is fixedly arranged on the motor shaft, a third sliding chute which is positioned at the upper side of the second sliding chute and is communicated with the second sliding chute is fixedly arranged in the working box, a second round sliding block which is partially positioned in the second sliding chute is arranged in the third sliding chute in a sliding manner, the upper end surface of the second round sliding block is connected with the inner wall of the upper side of the third sliding chute through a second compression spring, and when the third gear is meshed with the first gear, the rotating speed of the first rotating shaft is slower; a fourth cavity is fixedly arranged in the working box and is positioned at the left side of the first cavity and communicated with the first cavity, a fourth chute is fixedly arranged in the working box and is positioned at the upper side of the fourth cavity and is communicated with the fourth cavity, a first sliding block is arranged in the fourth chute in a sliding manner, the left end face of the first sliding block is connected with the left cavity wall of the fourth chute through the fourth chute, the left end face of the first sliding block is connected with the upper end face of the second circular sliding block through a first pull rope, the lower end face of the first sliding block is rotatably provided with a fourth rotating shaft, a belt pulley is fixedly arranged on the fourth rotating shaft, the motor shaft is in transmission connection with the fourth rotating shaft through the belt pulley, a fourth gear is fixedly arranged on the fourth rotating shaft and is positioned at the left side of the second gear, when the first pull rope is loosened, the first sliding block slides rightwards to abut against the right cavity wall of the fourth chute, the fourth gear is meshed with the second gear, so that the first rotating shaft rotates at a higher rotating speed, a condenser which is positioned on the lower side of the fourth cavity and on the left side of the first cavity is fixedly arranged in the working box, and when the electromagnet is electrified, the condenser starts to discharge cold air to reduce the temperature; a fifth cavity which is positioned at the right side of the second cavity and is provided with a downward opening is fixedly arranged in the working box, dry powder for fire extinguishing is filled in the fifth cavity, a fifth chute which is positioned at the rear side of the fifth cavity and is communicated with the fifth cavity is fixedly arranged in the working box, a sealing plate which can seal the lower opening of the fifth cavity is arranged in the fifth chute in a sliding manner, the rear end face of the sealing plate is connected with the rear cavity wall of the fifth chute through a third compression spring, a sixth chute which is positioned at the lower side of the third cavity and is communicated with the third cavity is fixedly arranged in the working box, a second sliding block is arranged in the sixth chute in a sliding manner, the left end face of the second sliding block is connected with the left cavity wall of the sixth chute through a second extension spring, a second rotating shaft which is positioned in the third cavity is rotatably arranged on the upper end face of the second sliding block, and a winding wheel is fixedly arranged on the second rotating shaft, the wire winding wheel is connected with the rear end face of the closing plate through a second pull rope, a first bevel gear positioned on the upper side of the wire winding wheel is fixedly arranged on the second rotating shaft, and when the wire winding wheel rotates, the closing plate is pulled backwards to open the lower opening of the fifth cavity, so that dry powder in the fifth cavity falls down to prevent ignition; the alarm device comprises a sixth cavity positioned on the right side of the third cavity, a third rotating shaft extending leftwards into the third cavity is arranged on the right cavity wall of the sixth cavity in a rotating mode, a second bevel gear and a third bevel gear which are positioned in the third cavity are fixedly arranged on the third rotating shaft from right to left in sequence, a fifth gear which is positioned in the sixth cavity is fixedly arranged on the third rotating shaft, a rack which is positioned behind the fifth gear and meshed with the fifth gear is arranged on the inner wall on the rear side of the sixth cavity in a sliding mode, the upper end face of the rack is connected with the inner wall on the upper side of the sixth cavity through a third stretching spring, the upper end face of the rack is connected with the right end face of the second sliding block through a third pull rope, an alarm capable of giving an alarm is fixedly arranged on the inner wall on the lower side of the sixth cavity, and the alarm gives an alarm when the rack is abutted to the alarm, the third pull rope pulls the second sliding block to slide rightwards until the second sliding block is abutted against the right cavity wall of the sixth sliding groove, and the first bevel gear is meshed with the second bevel gear; the piston is internally provided with a T-shaped cavity with an upward opening, a T-shaped rotating shaft which extends upwards into the third cavity is arranged in the T-shaped cavity in a rotating mode, a fourth bevel gear which is located in the third cavity is fixedly arranged on the T-shaped rotating shaft, when the piston slides upwards to abut against the inner wall of the upper side of the second cavity, the T-shaped rotating shaft is clamped into the key groove, and the fourth bevel gear is meshed with the third bevel gear.

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