An energy-saving air compressor inverter

Abstract

The present application relates to an energy-saving air compressor inverter, belonging to the field of air compressor inverters, including a casing, an air inlet is arranged on one side wall of the casing, and an air outlet is arranged on the side wall of the other side; a first rotating blade is arranged inside the air inlet, and the first rotating blade is rotatably connected in the air inlet through a first rotating shaft, and when the first rotating blade is rotated to a vertical state, adjacent first rotating blades abut against each other to close the air inlet; a second rotating blade is arranged inside the air outlet, and the second rotating blade is rotatably connected in the air outlet through a second rotating shaft, and when the second rotating blade is rotated to a vertical state, adjacent second rotating blades abut against each other to close the air inlet; a driving mechanism for synchronously controlling the first rotating blade and the second rotating blade to rotate synchronously is arranged inside the casing. The present application has the effect of quickly discharging the heat inside the air compressor inverter when the inside of the air compressor inverter is overheated.

Description

Technical Field

[0001] The present application relates to the field of air compressor inverters, and in particular to an energy-saving air compressor inverter. Background Art

[0002] The air compressor inverter is a special inverter tailored for various air compressors. The frequency conversion of the air compressor can stabilize the air supply pressure. Through the pressure regulator, the air compressor can be kept working at the set pressure value. The pressure is stable and reliable, and the pressure can be set steplessly and adjusted at any time. The motor can achieve soft start, and the service life and maintenance cycle of the compressor will be greatly extended.

[0003] During the operation of the air compressor inverter, a large amount of heat will be generated inside the air compressor inverter, resulting in increased energy consumption inside the air compressor inverter. The existing heat dissipation measures for air compressor inverters are mostly to open heat dissipation holes on the shell, through which the air inside the air compressor inverter is connected with the outside air, and the heat inside the air compressor inverter is discharged to the outside through the flow of air.

[0004] When designing the heat dissipation holes, since the dust problem also needs to be considered, the heat dissipation holes on the air compressor inverter cannot be too many or too large, otherwise it will easily allow external dust to enter the interior of the air compressor inverter, so the existing air compressor inverter has a poor heat dissipation effect. Summary of the invention

[0005] In order to quickly discharge the heat inside the air compressor inverter when the inside of the air compressor inverter is overheated, the present application provides an energy-saving air compressor inverter.

[0006] The energy-saving air compressor inverter provided in this application adopts the following technical solution:

[0007] 14. The air intake vent of claim 13, wherein the at least one vent is provided with a plurality of first and second rotating blades, each of which is connected to a cam portion and at least one second rotating blade is provided at the cam portion.

[0008] By adopting the above technical solution, when it is necessary to quickly cool down the temperature in the middle installation cavity, the first rotating fan blade and the second rotating fan blade are controlled to rotate, and the air inlet and the air outlet are opened, so that the air outside the casing can enter the interior of the casing, and the air inside the casing is discharged through the air outlet, thereby cooling down the temperature inside the casing. When cooling is not required, the first rotating fan blade and the second rotating fan blade close the air inlet and the air outlet, effectively reducing the dust entering the interior of the casing.

[0009] Optionally, the driving mechanism includes a first gear fixed on the first rotating shaft, a second gear fixed on the second rotating shaft, a first rack slidably connected to the inside of the housing and meshing with the first gear, and a second rack slidably connected to the inside of the housing and meshing with the second gear, and a driving component is provided between the first rack and the second rack for driving the first rack and the second rack to move synchronously.

[0010] By adopting the above technical solution, when the first rack moves vertically, the first rack and the first gear cooperate to drive the first shaft to rotate, and the first rotating blades rotate with the rotation of the first shaft. When the second rack moves vertically, the second rack and the second gear cooperate to drive the second shaft to rotate, and the second rotating blades rotate with the rotation of the second shaft.

[0011] Optionally, the driving assembly includes a vertically arranged telescopic push-pull device and a connecting rod connecting the first rack and the second rack, the telescopic push-pull device is fixed inside the housing, and the piston rod of the telescopic push-pull device is connected to the connecting rod.

[0012] By adopting the above technical solution, when the piston rod of the telescopic push-pull device moves, the connecting rod moves synchronously, and synchronously drives the first rack and the second rack to move in the vertical direction.

[0013] Optionally, the driving assembly includes a driving rod connecting the first rack and the second rack, and a driving screw vertically arranged and rotatably connected to the inside of the housing, the driving screw passes through the driving rod and is threadedly connected to the driving rod, and one end of the driving screw is provided with an electric driving member for driving the driving screw to rotate.

[0014] By adopting the above technical solution and controlling the driving rod with a driving screw, the driving rod can be stopped at any position of the stroke, thereby controlling the rotation angles of the first rotating blade and the second rotating blade.

[0015] Optionally, an exhaust device is provided inside the casing, and the exhaust device is used to draw external air into the casing.

[0016] By adopting the above technical solution, the air flow inside the casing can be accelerated, so that the air can take away the heat more quickly.

[0017] Optionally, the interior of the casing is provided with an upper air inlet cavity, a middle installation cavity and a lower exhaust cavity which are arranged in sequence from top to bottom, the upper air inlet cavity is located at a height higher than the air inlet port, the lower exhaust cavity is located at a height lower than the air outlet, the upper air inlet cavity is connected with the air inlet port through an air inlet channel, the lower exhaust cavity is connected with the air outlet through an air exhaust channel, a first connecting port is provided between the upper air inlet cavity and the middle installation cavity, and a second connecting port is provided between the lower air inlet cavity and the middle installation cavity.

[0018] By adopting the above technical solution, when air enters the interior of the casing, the air first enters the interior of the upper air intake cavity, then flows downward to the interior of the middle installation cavity, and finally flows to the lower exhaust cavity, and is finally discharged through the air outlet to ensure that the air entering the interior of the casing can completely pass through the middle installation cavity, so that the air can take away the heat in the middle installation cavity as much as possible.

[0019] Optionally, an air filter is provided inside the upper air intake cavity.

[0020] By adopting the above technical solution, an air filter is installed inside the upper air intake cavity. When the air passes through the upper air intake cavity, the air passes through the air filter to filter the air, thereby reducing the dust carried in the air and reducing the amount of dust entering the middle installation cavity.

[0021] Optionally, a mounting opening is provided on the side wall of the housing at a position opposite to the upper air intake cavity, and the air filter can be installed into the interior of the upper air intake cavity through the mounting opening.

[0022] By adopting the above technical solution, when installing the air filter into the upper air inlet cavity, the installation can be completed by simply inserting the air filter into the installation opening, which has the advantages of being convenient and quick.

[0023] Optionally, a plurality of first heat dissipation holes are formed on the first rotating fan blade, and a plurality of second heat dissipation holes are formed on the second rotating fan blade.

[0024] By adopting the above technical solution, when the temperature inside the casing is low, the temperature is reduced through the first heat dissipation holes on the first rotating fan blade and the second heat dissipation holes on the second rotating fan blade, so there is no need to open the air inlet and the air outlet.

[0025] Optionally, a temperature sensor is installed inside the housing, and a controller is provided on the housing. The controller is connected to the temperature sensor and the drive mechanism signal, and the controller can control the start-up of the drive mechanism.

[0026] By adopting the above technical solution, when the temperature inside the casing exceeds the set temperature value, the controller controls the drive mechanism to start, thereby opening the air inlet and the air outlet, increasing the amount of air entering the casing, thereby accelerating the cooling of the temperature inside the casing.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the temperature in the middle installation cavity needs to be quickly cooled down, the first rotating fan blade and the second rotating fan blade are controlled to rotate, and the air inlet and the air outlet are opened, so that the air outside the casing can enter the inside of the casing, and the air inside the casing is discharged through the air outlet, thereby cooling the temperature inside the casing. When cooling down is not required, the first rotating fan blade and the second rotating fan blade close the air inlet and the air outlet, effectively reducing the dust entering the inside of the casing;

[0029] 2. When the temperature inside the casing is low, the temperature is lowered through the first heat dissipation holes on the first rotating fan blade and the second heat dissipation holes on the second rotating fan blade, so there is no need to open the air inlet and the air outlet. When the temperature inside the casing exceeds the set temperature value, the controller controls the drive mechanism to start, thereby opening the air inlet and the air outlet, increasing the amount of air entering the casing, thereby accelerating the cooling of the temperature inside the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an energy-saving air compressor inverter in Example 1 of the present application;

[0031] Figure 2 yes Figure 1 Sectional view along AA;

[0032] Figure 3 It is to show the structural schematic diagram of the air inlet in this application;

[0033] Figure 4 yes Figure 3 A partial enlarged view of the B area;

[0034] Figure 5 It is to show the structural schematic diagram of the air outlet in this application;

[0035] Figure 6 yes Figure 5 A partial enlarged view of the middle C area;

[0036] Figure 7 is a structural schematic diagram of the connection structure between the drive assembly and the first rack and the second rack in the first embodiment of the present application;

[0037] Figure 8 is a structural schematic diagram of the connection structure between the drive assembly and the first rack and the second rack in the second embodiment of the present application;

[0038] Fig. 9 It is a structural diagram of embodiment 3 of the present application.

[0039] Description of reference numerals: 1, housing; 11, air inlet; 111, first flange; 12, air outlet; 121, second flange; 13, partition; 131, first communication port; 132, second communication port; 14, upper air inlet cavity; 15, middle installation cavity; 151, temperature sensor; 152, controller; 16, lower exhaust cavity; 17, air inlet channel; 18, exhaust channel; 19, air filter element; 110, installation port; 2. Exhaust fan; 3. First rotating blade; 31. First rotating shaft; 32. First gear; 33. First heat dissipation hole; 4. First rack; 5. First slide bar; 6. Second rotating blade; 61. Second rotating shaft; 62. Second gear; 63. Second heat dissipation hole; 7. Second rack; 8. Second slide bar; 9. Drive assembly; 91. Connecting rod; 92. Telescopic push-pull device; 93. Drive rod; 94. Drive screw; 95. Drive motor. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-9 This application is described in further detail.

[0041] Embodiment 1

[0042] The embodiment of the present application discloses an energy-saving air compressor inverter.

[0043] Reference Figure 1 , Figure 2 The energy-saving air compressor inverter includes a casing 1 with a hollow interior, and the interior of the casing 1 is used to install various electrical accessories required for the energy-saving air compressor inverter. In the embodiment of the present application, the shape of the casing 1 is a rectangular body. On the two opposite side walls of the casing 1, a rectangular air inlet 11 is opened on one of the side walls, and a rectangular air outlet 12 is opened on the side wall on the other side. The air inlet 11 and the air outlet 12 connect the interior of the casing 1 with the outside.

[0044] The interior of the housing 1 is divided into three chambers by two layers of partitions 13 arranged up and down, and the three chambers are, from top to bottom, an upper air intake chamber 14, a middle installation chamber 15, and a lower exhaust chamber 16. The edge of the partition 13 is fixed to the side wall of the housing 1. The height of the upper air intake chamber 14 is higher than the height of the air inlet 11, and the height of the lower exhaust chamber 16 is lower than the height of the air outlet 12.

[0045] An air inlet passage 17 is provided between the upper air inlet cavity 14 and the air inlet port 11, and the air inlet passage 17 is fixed on the inner surface of the housing 1. The air inlet passage 17 connects the upper air inlet cavity 14 with the air inlet port 11. When the air outside the housing 1 enters the interior of the housing 1, the air first enters the interior of the air inlet passage 17 through the air inlet port 11, and then flows upward along the air inlet passage 17 to the interior of the upper air inlet cavity 14.

[0046] A first communication port 131 is provided on the partition plate 13 between the upper air intake chamber 14 and the middle installation chamber 15, and the first communication port 131 connects the upper air intake chamber 14 with the middle installation chamber 15. A second communication port 132 is provided on the partition plate 13 between the middle installation chamber 15 and the lower exhaust chamber 16, and the second communication port 132 connects the middle installation chamber 15 with the lower exhaust chamber 16.

[0047] An exhaust passage 18 is provided between the lower exhaust cavity 16 and the air outlet 12, and the exhaust passage 18 is fixed on the inner surface of the housing 1. The exhaust passage 18 connects the lower exhaust cavity 16 with the air outlet 12. When the air in the middle installation cavity 15 is discharged from the housing 1, the air first enters the lower exhaust cavity 16, and is sent to the air outlet 12 along the exhaust passage 18, and finally sent to the outside of the housing 1 through the air outlet 12.

[0048] Since the height of the air outlet 12 is higher than the lower exhaust cavity 16 , when air enters the housing 1 from the air outlet 12 , part of the dust carried in the air will be intercepted in the lower exhaust cavity 16 , reducing the dust entering the middle installation cavity 15 .

[0049] An exhaust fan 2 is installed inside the first connecting port 131. After the exhaust fan 2 is started, the air outside the casing 1 is drawn into the air inlet 11 and sent into the middle installation cavity 15. The air flowing through the middle installation cavity 15 carries the heat in the middle installation cavity 15 and is finally discharged through the air outlet 12.

[0050] An air filter element 19 is installed inside the upper air inlet cavity 14. When air flows through the upper air inlet cavity 14, the air will flow through the air filter element 19. The air filter element 19 filters the air and reduces the air carried by the air entering the middle installation cavity 15.

[0051] An installation opening 110 is provided on the side wall of one side of the housing 1 at a position opposite to the upper air inlet cavity 14, and the air filter element 19 is inserted into the interior of the upper air inlet cavity 14 through the installation opening 110. When the air filter element 19 needs to be replaced, the air filter element 19 only needs to be pulled out through the installation opening 110.

[0052] Reference Figure 3 , Figure 4 A first flange 111 extending outward and enclosing the air inlet 11 is provided inside the air inlet 11, and the first flange 111 is fixedly connected to the housing 1. A plurality of first rotating blades 3 arranged in sequence from top to bottom are provided inside the first flange 111, and the first rotating blades 3 are rotatably connected inside the first flange 111 of the air inlet 11 through a first rotating shaft 31 arranged transversely. When the first rotating blades 3 are rotated to a vertical state, adjacent first rotating blades 3 abut against each other, and the first rotating blades 3 close the air inlet 11.

[0053] A plurality of first heat dissipation holes 33 are formed on the first rotating blade 3 .

[0054] The end of the first rotating shaft 31 passes through the first flange 111 and extends into the middle installation cavity 15. A first gear 32 is fixed to one end of each first rotating shaft 31 in the same direction, and the first gears 32 on each first rotating shaft 31 are arranged opposite to each other up and down. A first rack 4 meshing with each first gear 32 is arranged inside the middle installation cavity 15, and the first rack 4 is slidably connected inside the middle installation cavity 15. The moving direction of the first rack 4 is arranged vertically.

[0055] Two first slide bars 5 are arranged inside the middle mounting cavity 15 and vertically penetrate the first rack 4. The top end of the first slide bar 5 is fixed to the upper partition 13, and the bottom end of the first slide bar 5 is fixed to the lower partition 13. The first rack 4 is slidably connected to the two first slide bars 5. When the first rack 4 moves vertically, the first rotating blade 3 is driven to rotate through the cooperation between the first rack 4 and the first gear 32.

[0056] Reference Figure 5 , Figure 6 A second flange 121 extending outward and enclosing the air outlet 12 is provided inside the air outlet 12, and the second flange 121 is fixedly connected to the housing 1. A plurality of second rotating blades 6 arranged in sequence from top to bottom are provided inside the second flange 121, and the second rotating blades 6 are rotatably connected inside the second flange 121 of the air outlet 12 via a second rotating shaft 61 arranged transversely. When the second rotating blades 6 are rotated to a vertical state, adjacent second rotating blades 6 abut against each other, and the second rotating blades 6 close the air outlet 12.

[0057] A plurality of second heat dissipation holes 63 are formed on the second rotating blade 6 .

[0058] The end of the second rotating shaft 61 passes through the second flange 121 and extends into the middle installation cavity 15. A second gear 62 is fixed to one end of each second rotating shaft 61 in the same direction, and the second gears 62 on each second rotating shaft 61 are arranged opposite to each other up and down. A second rack 7 meshing with each second gear 62 is arranged inside the middle installation cavity 15, and the second rack 7 is slidably connected inside the middle installation cavity 15. The moving direction of the second rack 7 is arranged vertically.

[0059] Two second slide bars 8 are arranged inside the middle mounting cavity 15 and vertically penetrate the second rack 7. The top end of the second slide bar 8 is fixed to the upper partition 13, and the bottom end of the second slide bar 8 is fixed to the lower partition 13. The second rack 7 is slidably connected to the two second slide bars 8. When the second rack 7 moves vertically, the second rotating blade 6 is driven to rotate through the cooperation between the second rack 7 and the second gear 62.

[0060] Reference Figure 7 A driving assembly 9 is provided between the first rack 4 and the second rack 7, which synchronously drives the first rack 4 and the second rack 7 to move vertically. The driving assembly 9 includes a connecting rod 91 located between the first rack 4 and the second rack 7 and a telescopic push-pull device 92 arranged vertically. The telescopic push-pull device 92 can adopt an electric push rod, a telescopic cylinder or a telescopic hydraulic cylinder. In this embodiment, the telescopic push-pull device 92 takes an electric push rod as an example. The telescopic push-pull device 92 is located above the connecting rod 91. The piston rod of the telescopic push-pull device 92 is fixed to the connecting rod 91. When the piston rod of the telescopic push-pull device 92 moves, the first rack 4 and the second rack 7 are synchronously driven to move. When the first rack 4 and the second rack 7 move vertically, the first rotating blade 3 and the second rotating blade 6 rotate, thereby opening or closing the air inlet 11 and the air outlet 12.

[0061] The implementation principle of an energy-saving air compressor inverter in an embodiment of the present application is: when the energy-saving air compressor inverter is in use, when it is necessary to quickly cool down the temperature in the middle installation cavity 15, the first rotating fan blade 3 and the second rotating fan blade 6 are controlled to rotate, and the air inlet 11 and the air outlet 12 are opened, so that the air outside the casing 1 can enter the interior of the casing 1, and the air inside the casing 1 is discharged through the air outlet 12, thereby cooling down the temperature in the middle installation cavity 15. When cooling is not required, the first rotating fan blade 3 and the second rotating fan blade 6 close the air inlet 11 and the air outlet 12, effectively reducing the dust entering the interior of the casing.

[0062] Embodiment 2

[0063] The embodiment of the present application discloses an energy-saving air compressor inverter.

[0064] Reference Figure 8 , the difference between the second embodiment and the first embodiment is that the driving assembly 9 used in the second embodiment is different from the driving assembly 9 used in the first embodiment. The driving assembly 9 used in the second embodiment includes a driving rod 93 located between the first rack 4 and the second rack 7, one end of the driving rod 93 is fixed to the first rack 4, and the other end of the driving rod 93 is fixed to the second rack 7. The driving assembly 9 also includes a driving screw 94 that vertically penetrates the driving rod 93, and the driving screw 94 is rotatably connected to the inside of the middle mounting cavity 15. The driving screw 94 is threadedly connected to the driving rod 93. A driving motor 95 is arranged at one end of the driving screw 94, and the driving motor 95 is fixed to the inner surface of the housing 1. The motor shaft of the driving motor 95 is coaxially arranged and fixed with the driving screw 94.

[0065] The implementation principle of an energy-saving air compressor inverter in an embodiment of the present application is: by using a driving screw 94 to control the movement of a driving rod 93, the first rack 4 and the second rack 7 can be fixed at any height within the travel range, so that the rotation angle of the first rotating fan blade 3 and the second rotating fan blade 6 can be controlled.

[0066] Embodiment 3

[0067] The embodiment of the present application discloses an energy-saving air compressor inverter.

[0068] Reference Fig. 9 The difference between the third embodiment and the second embodiment is that:

[0069] A temperature sensor 151 and a controller 152 are also installed inside the middle installation cavity 15 . The controller 152 is signal-connected to the temperature sensor 151 and the driving motor 95 of the driving assembly 9 .

[0070] When the temperature inside the middle installation cavity 15 is low, the air inlet 11 is closed by the first rotating blade 3, and the air outlet 12 is closed by the second rotating blade 6, and the heat dissipation inside the housing 1 is performed through the first heat dissipation holes 33 on the first rotating blade 3 and the second heat dissipation holes 63 on the second rotating blade 6. When the temperature inside the middle installation cavity 15 rises, the first rotating blade 3 and the second rotating blade 6 are controlled to rotate, and the air inlet 11 and the air outlet 12 are fully opened, and at this time, the air outside the housing 1 can better enter the housing 1, thereby cooling the inside of the housing 1.

[0071] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An energy-saving air compressor inverter, characterized in that: The invention comprises a casing (1), wherein on the side walls of the casing (1) on opposite sides, one of the side walls is provided with an air inlet (11), and the other side wall is provided with an air outlet (12); a plurality of first rotating blades (3) arranged in sequence from top to bottom are arranged inside the air inlet (11), the first rotating blades (3) are rotatably connected to the air inlet (11) via a first rotating shaft (31) arranged transversely, and when the first rotating blades (3) are rotated to a vertical state, adjacent first rotating blades (3) abut against each other, thereby closing the air inlet (11); The air outlet (12) is provided with a plurality of second rotating blades (6) arranged in sequence from top to bottom, and the second rotating blades (6) are rotatably connected to the air outlet (12) via a second rotating shaft (61) arranged transversely, and when the second rotating blades (6) are rotated to a vertical state, adjacent second rotating blades (6) abut against each other, thereby closing the air inlet (11); the housing (1) is provided with a driving mechanism for synchronously controlling the first rotating blades (3) inside the air inlet (11) and the second rotating blades (6) inside the air outlet (12) to rotate synchronously, The housing (1) is provided with an upper air inlet chamber (14), a middle installation chamber (15) and a lower air exhaust chamber (16) arranged in sequence from top to bottom. The upper air inlet chamber (14) is located at a height higher than the air inlet port (11), and the lower air exhaust chamber (16) is located at a height lower than the air outlet port (12). The upper air inlet chamber (14) is connected to the air inlet port (11) via an air inlet passage (17), and the lower air exhaust chamber (16) is connected to the air outlet port (12) via an air exhaust passage (18). A first connecting opening (131) is provided between the upper air inlet chamber (14) and the middle installation chamber (15), and a second connecting opening (132) is provided between the lower air exhaust chamber and the middle installation chamber (15).

2. The energy-saving air compressor inverter according to claim 1 is characterized in that: The driving mechanism comprises a first gear (32) fixed on a first rotating shaft (31), a second gear (62) fixed on a second rotating shaft (61), a first rack (4) slidably connected to the inside of the housing (1) and meshing with the first gear (32), and a second rack (7) slidably connected to the inside of the housing (1) and meshing with the second gear (62), wherein a driving component (9) is provided between the first rack (4) and the second rack (7) for driving the first rack (4) and the second rack (7) to move synchronously.

3. The energy-saving air compressor inverter according to claim 2 is characterized in that: The driving assembly (9) comprises a telescopic push-pull device (92) arranged vertically and a connecting rod (91) connecting the first rack (4) and the second rack (7); the telescopic push-pull device (92) is fixed inside the housing (1); and a piston rod of the telescopic push-pull device (92) is connected to the connecting rod (91).

4. The energy-saving air compressor inverter according to claim 2 is characterized in that: The driving assembly (9) comprises a driving rod (93) connecting the first rack (4) and the second rack (7) and a driving lead screw (94) arranged vertically and rotatably connected to the inside of the housing (1); the driving lead screw (94) passes through the driving rod (93) and is threadedly connected to the driving rod (93); one end of the driving lead screw (94) is provided with an electric driving member for driving the driving lead screw (94) to rotate.

5. The energy-saving air compressor inverter according to claim 1, characterized in that: An exhaust device is provided inside the casing (1), and the exhaust device is used to draw outside air into the casing (1).

6. The energy-saving air compressor inverter according to claim 1, characterized in that: An air filter is arranged inside the upper air intake cavity (14).

7. The energy-saving air compressor inverter according to claim 6, characterized in that: A mounting opening (110) is provided on the side wall of the housing (1) at a position opposite to the upper air intake cavity (14), and the air filter element can be mounted inside the upper air intake cavity (14) through the mounting opening (110).

8. The energy-saving air compressor inverter according to claim 1, characterized in that: The first rotating fan blade (3) is provided with a plurality of first heat dissipation holes (33), and the second rotating fan blade (6) is provided with a plurality of second heat dissipation holes (63).

9. The energy-saving air compressor inverter according to claim 8, characterized in that: A temperature sensor (151) is also installed inside the housing (1), and a controller (152) is provided on the housing (1). The controller (152) is connected to the temperature sensor (151) and the drive mechanism signal, and the controller (152) can control the start-up of the drive mechanism.

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