阅读说明：本技术 一种干式磨床自适应除尘冷却砂轮装置的除尘冷却方法 (Dust removal cooling method of self-adaptive dust removal cooling grinding wheel device of dry grinding machine ) 是由 姜潮 田万一 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种干式磨床自适应除尘冷却砂轮装置的除尘冷却方法,其特征在于：磨床磨削作业时,砂轮基体(2.2)通过砂轮基体轮轴(2.1)支撑于支座(1)上,并且在电机的带动下旋转,设置于砂轮基体(2.2)上的砂轮磨片系统(3)将由于离心力的作用,通过相连的第一液压支撑缸(3.2)和第二液压支撑缸(3.3)绕着转轴(3.1)相对于砂轮基体(2.2)向外转动,当离心力与弹簧(3.6)的拉力平衡时,砂轮磨片(3.4)达到平衡位置,砂轮磨片(3.4)将与待加工工件接触,从而实现对工件的磨削加工作用；自适应除尘冷却砂轮装置能够完全无间隙回收磨屑,能够大幅提高磨削除尘效果。(The invention discloses a dust removal cooling method of a self-adaptive dust removal cooling grinding wheel device of a dry grinding machine, which is characterized by comprising the following steps of: when the grinding machine is used for grinding, the grinding wheel base body (2.2) is supported on the support (1) through the grinding wheel base body wheel shaft (2.1) and rotates under the driving of the motor, the grinding wheel and grinding disc system (3) arranged on the grinding wheel base body (2.2) rotates outwards relative to the grinding wheel base body (2.2) through the first hydraulic supporting cylinder (3.2) and the second hydraulic supporting cylinder (3.3) which are connected around the rotating shaft (3.1) under the action of centrifugal force, when the centrifugal force is balanced with the tensile force of the spring (3.6), the grinding wheel and grinding disc (3.4) reaches a balance position, and the grinding wheel and grinding disc (3.4) is in contact with a workpiece to be machined, so that the grinding machining effect on the workpiece is realized; the self-adaptive dust removal cooling grinding wheel device can completely recover abrasive dust without clearance, and can greatly improve the grinding and dust removal effects.)

1. A dust removal cooling method of a self-adaptive dust removal cooling grinding wheel device of a dry grinding machine is characterized by comprising the following steps:

when the grinding machine is used for grinding, the grinding wheel base body (2.2) is supported on the support (1) through the grinding wheel base body wheel shaft (2.1) and rotates under the driving of the motor, the grinding wheel and grinding disc system (3) arranged on the grinding wheel base body (2.2) rotates outwards relative to the grinding wheel base body (2.2) through the first hydraulic supporting cylinder (3.2) and the second hydraulic supporting cylinder (3.3) which are connected around the rotating shaft (3.1) under the action of centrifugal force, when the centrifugal force is balanced with the tensile force of the spring (3.6), the grinding wheel and grinding disc (3.4) reaches a balance position, and the grinding wheel and grinding disc (3.4) is in contact with a workpiece to be machined, so that the grinding machining effect on the workpiece is realized;

under the action of centrifugal force, the airflow guide plate (3.5) flexibly connected with the outlet of the air channel (4.5) moves along the radial direction of the outlet of the air channel (4.5), and the moving distance is in direct proportion to the magnitude of the centrifugal force; under the suction effect of the fan (4.1), the grinding dust which flies out tangentially and is generated by grinding is just sucked, the gap between the grinding wheel grinding disc (3.4) and the grinding wheel base body (2.2) is in direct proportion to the rotating speed of the grinding wheel, the size of the outlet of the air channel (4.5) and the quantity of the grinding dust which are adjusted by the air flow guide plate (3.5) are also in direct proportion to the rotating speed of the grinding wheel, and therefore self-adaption is achieved and the recycling of the grinding dust is achieved.

2. The dust removal cooling method for the self-adaptive dust removal cooling grinding wheel device of the dry grinding machine as claimed in claim 1, wherein: when a grinding wheel base body feeds, a grinding wheel grinding piece (3.4) is contacted with a workpiece to be processed along a circumferential single side for grinding, the radial force borne by a grinding point is gradually increased, the radial force borne by the grinding wheel grinding piece (3.4) is borne by the single side, the pressure in the second hydraulic supporting cylinder (3.3) or the first hydraulic supporting cylinder (3.2) is unequal, the difference of the radial forces borne by the circumferential two sides is converted into pressure difference when the grinding wheel grinding piece (3.4) is fed through the second hydraulic supporting cylinder (3.3) or the first hydraulic supporting cylinder (3.2), and the pressure difference between the first hydraulic supporting cylinder (3.2) and the second hydraulic supporting cylinder (3.3) is converted into a signal through a pressure difference sensor (5.2) connected with the second hydraulic supporting cylinder (3.3) or the first hydraulic supporting cylinder through a hydraulic pipeline (5.4).

3. The dust removal cooling method for the self-adaptive dust removal cooling grinding wheel device of the dry grinding machine as claimed in claim 2, characterized in that: the electric control valve (5.3) is driven according to the pressure difference between the first hydraulic supporting cylinder (3.2) and the second hydraulic supporting cylinder (3.3), the electric control valve (5.3) is connected with the ventilation door (5.1), and the ventilation door (5.1) is driven by the electric control valve (5.3) to adjust the opening degree of the ventilation door.

4. The dust removal cooling method for the self-adaptive dust removal cooling grinding wheel device of the dry grinding machine as claimed in claim 2, characterized in that: when the feeding amount of the grinding wheel device is increased, the difference between radial forces borne by the grinding wheel abrasive disc (3.4) along the two sides in the circumferential direction is increased greatly, so that the pressure difference in the second hydraulic supporting cylinder (3.3) or the first hydraulic supporting cylinder is larger, the pressure difference sensor (5.2) and the signal amplifier (5.5) send signals to adjust the electric adjusting valve, and the opening degree of the vent valve 5.1 is increased.

5. The dust removal cooling method for the self-adaptive dust removal cooling grinding wheel device of the dry grinding machine as claimed in claim 2, characterized in that: according to the processing requirement, the current grinding condition and the current temperature of the grinding wheel grinding piece (3.4), the rigidity of the spring (3.6) is adjusted, and the size of a gap between the grinding wheel grinding piece (3.4) and the grinding wheel base body (2.2) and the size of an outlet of the air channel (4.5) are controlled.

Technical Field

The invention relates to the technical field of grinding machines, in particular to a dust removal cooling method of a self-adaptive dust removal cooling grinding wheel device of a dry grinding machine.

Background

The grinding machine is mainly used for processing materials with higher hardness or brittle materials, such as hard alloy, glass and the like; while grinding machines are generally used for grinding with high precision and with little surface roughness. During grinding, a grinding fluid is usually used for lubrication and cooling of the grinding machine. In some special scenes, such as grinding of special toxic and harmful substances and the like, a dry grinding machine is adopted, the dry grinding machine is cooled by adopting a gas external cooling mode at present, cooling air acts near a contact point of a grinding wheel and a workpiece, the grinding wheel is swept by high-pressure air, the cooling and lubricating effects are achieved, and meanwhile, the abrasive particles can fall off. On one hand, the grinding heat is generated in the grinding process, and the grinding heat is accumulated to cause ablation on the grinding wheel and the workpiece without the grinding fluid, so that the grinding quality of the workpiece and the service life of the grinding wheel are influenced; on the other hand, the effect that the grinding wheel abrasive particles fall off is not ideal, the grinding wheel abrasive particles fall off too early or too late due to the problem of the cooling effect, the grinding wheel is worn too fast too early, the abrasive particles fall off too late, the abrasive particles are worn more and more dully, the grinding capacity is reduced, the abrasive particles are smooth, the grinding efficiency is influenced, the repeated slipping is caused, the grinding heat aggregation effect is increased, and the further ablation of the grinding wheel and the workpiece is caused.

Disclosure of Invention

The invention aims to provide a dust removal cooling method of a self-adaptive dust removal cooling grinding wheel device of a dry grinding machine, aiming at the problems of poor grinding heat cooling effect, non-ideal abrasive particle removal effect and the like of the dry grinding machine during processing.

In order to achieve the above object, the following technical scheme is provided in the present invention to provide a dust removal cooling method for a self-adaptive dust removal cooling grinding wheel device of a dry grinding machine, wherein during grinding operation of the grinding machine, a grinding wheel base body is supported on a support through a wheel shaft of the grinding wheel base body and is driven by a motor to rotate, a grinding wheel and grinding disc system arranged on the grinding wheel base body rotates outwards relative to the grinding wheel base body around a rotating shaft through a first hydraulic support cylinder and a second hydraulic support cylinder which are connected under the action of centrifugal force, when the centrifugal force is balanced with the tensile force of a spring, the grinding wheel and grinding disc reaches a balanced position, and the grinding wheel and grinding disc is in contact with a workpiece to be machined, so;

under the action of centrifugal force, the airflow guide plate flexibly connected with the outlet of the wind channel moves along the radial direction of the outlet of the wind channel, and the moving distance is in direct proportion to the magnitude of the centrifugal force; under the suction effect of the fan, the grinding dust which flies out tangentially and is generated by grinding is just sucked, the gap between the grinding disc of the grinding wheel and the grinding wheel base body is in direct proportion to the rotating speed of the grinding wheel, and the size of the outlet of the air channel and the quantity of the grinding dust which are regulated by the airflow guide plate are also in direct proportion to the rotating speed of the grinding wheel, so that the self-adaption recovery of the grinding dust is realized.

Further, when the grinding wheel base body feeds, the grinding wheel abrasive disc contacts with the workpiece to be processed along the circumference unilateral and grinds, the radial force that the grinding point department receives increases gradually, the grinding wheel abrasive disc unilateral bears the radial force, the pressure in second hydraulic pressure support cylinder or the first hydraulic pressure support cylinder is unequal, the difference of the radial force that the circumference both sides received when feeding the grinding wheel abrasive disc through second hydraulic pressure support cylinder or first hydraulic pressure support cylinder converts to the pressure difference, the pressure difference sensor who links to each other through hydraulic pipeline and second hydraulic pressure support cylinder or first hydraulic pressure support cylinder converts the pressure difference of first hydraulic pressure support cylinder and second hydraulic pressure support cylinder into the signal.

Furthermore, the electric control valve is driven according to the pressure difference between the first hydraulic supporting cylinder and the second hydraulic supporting cylinder and is connected with the vent door, and the vent door is driven by the electric control valve to adjust the opening degree of the vent door.

Further, when the feeding amount of the grinding wheel device is increased, the difference between radial forces borne by the grinding wheel grinding disc along the two sides in the circumferential direction is increased greatly, so that the pressure difference in the second hydraulic supporting cylinder or the first hydraulic supporting cylinder is larger, the pressure difference sensor and the signal amplifier send signals to adjust the electric adjusting valve, and the opening degree of the vent valve 5.1 is increased.

And further, adjusting the rigidity of the spring according to the processing requirement, the current grinding condition and the current temperature of the grinding wheel and the grinding disc, and controlling the size of a gap between the grinding wheel and the grinding wheel base body and the size of an outlet of the air channel.

Compared with the prior art, the invention has the beneficial effects that:

firstly, the self-adaptive dust-removing cooling grinding wheel device can completely recover abrasive dust without clearance, and can greatly improve the grinding and dust-removing effects;

secondly, the size of the recovery gap can be adjusted in a self-adaptive manner according to the quantity of the abrasive dust, and the reliable dust removal effect is ensured;

thirdly, cooling air acts on the interior of the grinding wheel and the grinding sheet to realize the integral cooling effect on the grinding wheel and the grinding sheet and avoid the ablation of the surface of the grinding wheel;

and fourthly, the cooling air and the dust removal function are communicated, the cooling air is in a suction function, and the aerosol effect and the harm diffusion of toxic or radioactive substances are avoided through the aerosol filtering device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of a grinding wheel and blade system of the present invention;

FIG. 3 is an enlarged view of a portion of the grinding wheel and blade system of the present invention;

FIG. 4 is a cross-sectional view of a grinding wheel matrix assembly of the present invention;

FIG. 5 is a schematic diagram of a grinding wheel air duct control system of the present invention;

wherein: 1-a support; 2-grinding wheel matrix device; 3-grinding wheel and grinding system; 4-a grinding wheel air duct system; 5-a grinding wheel air duct control system; 1.1-bearing seat; 1.2-bearings; 2.1-grinding wheel base body axle; 2.2-grinding wheel base body; 3.1-rotating shaft; 3.2-a first hydraulic support cylinder; 3.3-a second hydraulic support cylinder; 3.4-grinding by a grinding wheel; 3.5-airflow guide plate; 3.6-spring; 4.1-a fan; 4.2-aerosol filtration system; 4.3-flexible telescopic air duct; 4.4-grinding wheel main ventilation duct; 4.5-wind channel; 5.1-a ventilation door; 5.2-differential pressure sensor; 5.3-electric regulating valve; 5.4-hydraulic lines; 5.5-signal amplifier; 5.6-temperature sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1, the embodiment provides an adaptive dust removal and grinding wheel cooling device for a dry grinding machine, which comprises a support 1, a grinding wheel base device 2, a grinding wheel and abrasive disc system 3, a grinding wheel air duct system 4 and a grinding wheel air duct control system 5.

The support 1 comprises bearing frame 1.1 and bearing 1.2, and bearing frame 1.2 is fixed in on the grinding machine removes the frame, thereby removes along with removing the frame and realizes grinding wheel unit's whole feed grinding, and bearing 1.2 is settled in bearing frame 1.1 to realize the rotation of emery wheel base member device 2 and the sound separation that removes the frame.

The grinding wheel base body device 2 comprises a grinding wheel base body wheel shaft 2.1 and a grinding wheel base body 2.2 and is fixed on the support 1, the grinding wheel base body is installed on the support 1 through the grinding wheel base body wheel shaft 2.1, and the grinding wheel base body 2.2 and the grinding wheel base body wheel shaft 2.1 are integrally formed and manufactured.

The grinding wheel and abrasive sheet system 3 comprises a rotating shaft 3.1, a first hydraulic supporting cylinder 3.2, a second hydraulic supporting cylinder 3.3, a grinding wheel and abrasive sheet 3.4, an airflow guide plate 3.5 and a spring 3.6, wherein one end of the first hydraulic supporting cylinder 3.2 and one end of the second hydraulic supporting cylinder 3.3 are respectively connected with the grinding wheel base body 2 through the rotating shaft 3.1, the other end of the first hydraulic supporting cylinder is respectively connected with the end part and the middle part of the grinding wheel and abrasive sheet 3.4 through the rotating shaft 3.3 to form a parallel connecting rod structure, the grinding wheel and abrasive sheet 3.4 can freely rotate along with the rotating shaft 3.1 along with the first hydraulic supporting cylinder 3.2 and the second hydraulic supporting cylinder 3.3, and meanwhile, the rotating shaft 3.1 connected with the first hydraulic supporting cylinder 3.2 and the abrasive sheet 3.4 is connected with the grinding wheel and abrasive sheet 3.4 through the spring 3.6 to realize static close fit of the grinding wheel and abrasive sheet 3.4 and the grinding wheel base body. The airflow guide plate 3.5 is arranged between the grinding wheel abrasive disc 3.4 and the grinding wheel matrix 2.2, is flexibly connected with an air channel outlet of the grinding wheel matrix 2.2, and can move radially along with the change of the rotating speed of the grinding wheel matrix 2.2, so that the opening degree of the air channel outlet is adjusted in a self-adaptive manner, and the purpose of temperature control is achieved.

The grinding wheel air duct system 4 is composed of a fan 4.1, an aerosol filtering system 4.2, a flexible telescopic air duct 4.3, a grinding wheel main ventilation air duct 4.4 and an air channel 4.5, wherein the fan 4.1 is connected with the aerosol filtering system 4.2, the fan is connected with the main ventilation air duct 4.4 of the grinding wheel through the flexible telescopic air duct 4.3, the main ventilation air duct 4.4 is arranged inside a grinding wheel base body wheel shaft 2.1, the main ventilation air duct 4.4 is connected with the air channel 4.5, and the air channel 4.5 is arranged inside the grinding wheel and radially distributed along the radial direction.

The grinding wheel air duct control system 5 comprises a vent door 5.1, a differential pressure sensor 5.2, an electric regulating valve 5.3, a hydraulic pipeline 5.4, a signal amplifier 5.5, a temperature sensor 5.6 and the like, wherein the vent door 5.1 is arranged at the inlet of an air duct 4.5 and is connected with a main vent air duct 4.4, the differential pressure sensor 5.2 is connected with a first hydraulic supporting cylinder 3.2 and a second hydraulic supporting cylinder 3.3 through a hydraulic pipeline 5.4, the signal amplifier 5.5 amplifies and converts differential pressure signals of the first hydraulic supporting cylinder 3.2 and the second hydraulic supporting cylinder 3.3 into electric signals, the electric regulating valve 5.3 is driven according to the differential pressure of the first hydraulic supporting cylinder 3.2 and the second hydraulic supporting cylinder 3.3, the electric regulating valve 5.3 is connected with the vent door 5.1, and the opening degree of the vent door 5.1 is regulated under the driving of the electric regulating valve 5.3.

When the grinding machine is used for grinding operation, the grinding wheel base body 2.2 is supported on the support 1 through the grinding wheel base body wheel shaft 2.1 and is driven by the motor to rotate at a high speed, the grinding wheel and abrasive disc system 3 arranged on the grinding wheel base body 2.2 rotates outwards relative to the grinding wheel base body 2.2 through the first hydraulic supporting cylinder 3.2 and the second hydraulic supporting cylinder 3.3 which are connected through the centrifugal force around the rotating shaft 3.1, when the centrifugal force is balanced with the tensile force of the spring 3.6, the grinding wheel and abrasive disc 3.4 reaches a balanced position, the grinding wheel and abrasive disc 3.4 is contacted with a workpiece to be machined, and therefore the grinding machining effect on the workpiece is achieved;

meanwhile, under the action of centrifugal force, the airflow guide plate 3.5 flexibly connected with the outlet of the air channel 4.5 also moves along the outlet of the air channel 4.5 in the radial direction, the moving distance is in direct proportion to the magnitude of the centrifugal force, namely the rotating speed of the grinding wheel device, and the opening degree of the outlet of the air channel 4.5 is larger as the radial moving distance of the airflow guide plate 3.5 is larger. A certain gap is formed between the grinding wheel abrasive disc 3.4 and the grinding wheel base body 2.2, the gap is communicated with the grinding wheel air duct system 4 through an outlet of an air channel 4.5, under the action of suction of a fan 4.1, the grinding dust which flies out tangentially and is generated by grinding is just sucked, the gap between the grinding wheel abrasive disc 3.4 and the grinding wheel base body 2.2 is in direct proportion to the rotating speed of the grinding wheel, the size of the outlet of the air channel 4.5 and the quantity of the grinding dust which are regulated by an air flow guide plate 3.5 are also in direct proportion to the rotating speed of the grinding wheel, the flying angle is also in positive relation to the rotating speed of the grinding wheel, and the recovery of the grinding dust can be; and the air generates convection to act on the inside of the grinding wheel grinding piece 3.4, so that a good cooling effect is achieved on the grinding wheel, ablation of the grinding wheel grinding piece 3.4 is avoided, the cooling air is sucked into the aerosol filtering device 4.2, aerosol pollution caused by the cooling air is avoided, grinding heat and the rotation speed of the grinding wheel are in a proportional relation, along with the increase of the rotation speed, the radial outward moving distance of the airflow guide plate 3.5 is gradually increased, the outlet of the air channel 4.5 is also gradually increased, the wind resistance is reduced, and the cooling effect of the grinding wheel grinding piece 3.4 can be controlled in a self-adaptive mode.

In the invention, self-adaptive dust removal and cooling are realized through the hydraulic support cylinders 3.2 and 3.3, the differential pressure sensor 5.2, the electric regulating valve 5.3 and the ventilation door 5.1, and the temperature of the grinding wheel can be self-adaptively regulated according to the feeding amount. The method used is as follows: when the grinding wheel base body is fed, the grinding wheel abrasive disc 3.4 is generally contacted with a workpiece to be processed along one side of the circumferential direction for grinding, the radial force applied to the grinding point is gradually increased, and the grinding is more severe.

When the grinding wheel device moves along with the moving frame to realize integral feed grinding of the grinding wheel device, the two sides of the grinding wheel abrasive disc 3.4 along the circumferential direction are generally contacted with a workpiece to be machined, and the feeding amount determines the grinding intensity between the grinding wheel abrasive disc 3.4 and the workpiece to be machined. Because the grinding wheel abrasive disc 3.4 bears radial force on one side, the pressure in the first hydraulic supporting cylinder 3.2 or the second hydraulic supporting cylinder 3.3 is increased along with the radial force, the pressure in the second hydraulic supporting cylinder 3.3 or the first hydraulic supporting cylinder 3.2 is not obviously increased, and the pressure in the second hydraulic supporting cylinder 3.3 or the first hydraulic supporting cylinder is unequal. The radial force difference that circumference both sides received when above-mentioned feed emery wheel abrasive disc 3.4 through second hydraulic pressure support cylinder 3.3 or first hydraulic pressure support cylinder converts the pressure differential into, pressure differential sensor 5.2 that links to each other through hydraulic pressure pipeline 5.4 and second hydraulic pressure support cylinder 3.3 or first hydraulic pressure support cylinder detects the pressure differential of first hydraulic pressure support cylinder 3.2 and second hydraulic pressure support cylinder 3.3, pressure differential signal converts electric signal drive electrical control valve 5.3 into through signal amplifier 5.5, electrical control valve 5.3 is connected with air door 5.1, air door 5.1 is under electrical control valve 5.3's drive, the air door aperture is adjusted.

When the feeding amount of the grinding wheel device is large, the difference between radial forces borne by the grinding wheel abrasive disc 3.4 along the two sides in the circumferential direction is larger, so that the pressure difference in the second hydraulic supporting cylinder 3.3 or the first hydraulic supporting cylinder is larger, the pressure difference sensor 5.2 and the signal amplifier 5.5 send signals to adjust the electric adjusting valve, the opening degree of the vent valve 5.1 is increased, grinding heat aggregation caused by large feeding amount is reduced, and ablation of a grinding wheel and a workpiece is avoided.

During grinding, the rigidity of the spring 3.6 is adjusted to meet the current machining and heat dissipation requirements:

in the actual processing process, the rigidity of the spring 3.6 is adjusted according to the processing requirement, the current grinding condition and the current temperature of the grinding wheel and grinding disc 3.4, and the size of a gap between the grinding wheel and grinding disc 3.4 and the grinding wheel base body 2.2 and the size of an outlet of the air channel 4.5 are controlled. If the self-adaptive heat dissipation effect is not good when the rigidity of the current spring 3.6 is large, the rigidity of the spring 3.6 is reduced, so that the radial outward movement distance of the airflow guide plate 3.5 can be increased under the action of the same centrifugal force, and vice versa.

During grinding, self-adaptive dedusting and cooling:

in the subsequent processing process, the air flow guide plate 3.5 only needs to move radially under the action of centrifugal force, so that the size of the outlet of the air channel 4.5 is controlled, and the self-adaptive temperature control can be simply and conveniently realized. When the centrifugal force is increased, the airflow guide plate 3.5 moves outwards, the outlet of the air channel 4.5 is increased, and when the centrifugal force is reduced, the airflow guide plate 4.5 moves inwards under the tension of the spring 3.6.

When the grinding wheel device is used for integral feed grinding, the device can be adaptively controlled in temperature according to the stress on two sides of a grinding wheel 3.4:

when the whole grinding wheel device is subjected to feed grinding, one side of a grinding wheel abrasive disc 3.4 bears radial force, and the size of the vent door 5.1 is controlled according to pressure difference signals in the hydraulic support cylinders 3.2 and 3.3 at two sides. The differential pressure signal detected by the differential pressure sensor 5.2 is amplified and converted into an electric signal by the signal amplifier 5.5, and the electric regulating valve 5.3 is driven to control the size of the vent door 5.1. The larger the feed amount is, the larger the radial force borne by the single side is, the larger the pressure difference signal is, and then the size of the vent door 5.1 is increased.

S4, when the whole grinding wheel device is subjected to feed grinding, the multiplying power of a signal amplifier is adjusted by the device to meet the temperature control requirement:

a temperature sensor 5.6 is arranged at the grinding disc of the grinding wheel to continuously monitor the surface temperature of the grinding wheel, and if the temperature monitored by the temperature sensor 5.6 is too high in the machining process, the differential pressure signal cannot well regulate the temperature under the 5.5 multiplying power of the current signal amplifier. The multiplying power of the signal amplifier 5.5 can be increased, so that the regulation and control force on the ventilation door 5.1 is increased, and vice versa.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.