WO2020258590A1 - 呼吸压力阀及具有呼吸压力阀的装置 - Google Patents

呼吸压力阀及具有呼吸压力阀的装置 Download PDF

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Publication number
WO2020258590A1
WO2020258590A1 PCT/CN2019/110875 CN2019110875W WO2020258590A1 WO 2020258590 A1 WO2020258590 A1 WO 2020258590A1 CN 2019110875 W CN2019110875 W CN 2019110875W WO 2020258590 A1 WO2020258590 A1 WO 2020258590A1
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WIPO (PCT)
Prior art keywords
pressure valve
breathing pressure
breathing
sealing ring
inner cavity
Prior art date
Application number
PCT/CN2019/110875
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English (en)
French (fr)
Inventor
曹向明
Original Assignee
无锡明诚汽车部件有限公司
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Filing date
Publication date
Priority claimed from CN201910568936.7A external-priority patent/CN110190698A/zh
Priority claimed from CN201910568935.2A external-priority patent/CN110206919A/zh
Priority claimed from CN201910570159.XA external-priority patent/CN110206925A/zh
Application filed by 无锡明诚汽车部件有限公司 filed Critical 无锡明诚汽车部件有限公司
Publication of WO2020258590A1 publication Critical patent/WO2020258590A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof

Definitions

  • This application relates to the technical field of motor sealing, for example, to a breathing pressure valve and a device with a breathing pressure valve.
  • the motor is a kind of equipment with high functional requirements. It is easily affected by external dust and water, which affects its service life. Especially under harsh environmental conditions, the tightness requirements are higher. Especially for waterproof requirements, the ideal structure of the inner cavity of the motor should be a closed structure. However, the motor will generate heat in the continuous working state, and the inner cavity in the sealed state will cause the internal gas to expand, and the increase in internal pressure will cause the body to rupture , Even in extreme conditions, high temperature heating causes the motor to burn. Therefore, the completely sealed structure has drawbacks. In addition to the waterproofness of the body, the expansion and exhaust capability and the fire protection function must also be considered.
  • the starter body assembly is generally composed of split front cover, middle cover, casing, rear cover, one-way device, switch assembly and lead-out assembly, etc. There are many connections between various components. , The tightness is difficult to guarantee, resulting in poor anti-soaking ability of the starter body assembly and low service life. In addition, in the continuous working state of the motor, the structure with low sealing performance has the risk of high temperature heating and burning and causing damage.
  • an additional exhaust device needs to be used in conjunction to achieve the effect of adjusting the air pressure in the inner cavity.
  • an electronic control valve on the casing, and monitoring parameters such as temperature and pressure by cooperating with sensors. Once the detected value of the parameter is abnormal, the valve is controlled to open to achieve the purpose of pressure relief. When the detected value of the parameter is When it is normal, control the valve to reset and close.
  • This kind of structure control system is relatively complicated, high cost, high requirements for sensor sensitivity, high failure rate, poor anti-soaking ability, large degree of modification of the motor structure, and insufficient adaptability.
  • the present application provides a breathing pressure valve and a device with a breathing pressure valve. After the airtightness of the body is ensured, the air pressure adjustment function is added, which solves the disadvantages of the completely sealed structure and meets the design requirements for water flooding.
  • An embodiment provides a breathing pressure valve, comprising: a base, a first end of the base is a fixing part, a second end of the base is a connecting part, the base is provided with a connecting cavity along the axial direction, so The side wall of the connecting cavity is provided with internal threads, and the end surface wall of the connecting cavity is provided with a through hole extending to the end surface of the connecting portion, and the connecting portion is provided with an external thread; a dustproof nut , The dust-proof nut is provided with a first inner cavity with a single opening along the axial direction, and the inner wall of the first inner cavity is provided with an inner thread that matches with the outer thread of the base, and the dust-proof nut is also A first vent connecting the outside world and the first inner cavity is provided; a spring seat is provided with a second inner cavity with a single opening along the axial direction.
  • the surface of the second inner cavity is provided with The internal thread of the base is matched with the external thread, the spring seat is also provided with a second vent hole that communicates the outside world with the second inner cavity; the pressure spring is arranged in the second inner cavity of the spring seat And a steel ball, the steel ball is arranged in the second inner cavity of the spring seat, the pressure spring is arranged to push the steel ball, the diameter of the steel ball is larger than that of the through hole Aperture, the opening of the second inner cavity faces the base, and the steel ball is arranged to form a spherical seal on the through hole under the action of the pressure spring.
  • An embodiment provides a device with a breathing pressure valve, comprising a body and the above breathing pressure valve, the body is provided with an inner cavity of a closed space, and at least two breathing pressure valves are provided on the body,
  • the breathing pressure valve is a one-way check structure, and every two of the at least two breathing pressure valves are arranged on the body in a manner of opposite flow directions.
  • An embodiment provides a breathing pressure valve, comprising: a valve body, a first inner cavity with a single opening is formed on the valve body along the axial direction, and an end surface wall of the first inner cavity is provided with an outer end surface The first vent; the spring seat, the spring seat is provided with a second inner cavity with a single opening along the axial direction, and the end wall of the second inner cavity is provided with a second vent extending to the outer end; pressure A spring is arranged in the second inner cavity; a steel ball, the steel ball is arranged in the second inner cavity, the pressure spring is arranged to push the steel ball outward, the diameter of the steel ball is larger than The aperture of the first vent hole, the opening of the spring seat faces the first vent hole and is interference press fitted in the first inner cavity of the valve body, and the steel ball is set to be The function of the pressure spring forms a spherical seal on the first vent hole.
  • An embodiment provides a device with a breathing pressure valve, comprising a body and the above breathing pressure valve, the body is provided with an inner cavity of a closed space, and at least two breathing pressure valves are provided on the body,
  • the breathing valve is a one-way check structure, and every two of the at least two breathing valves are arranged on the body in a manner that the direction of the flow path is opposite.
  • Fig. 1 is a schematic structural diagram of a starter body for a device with a breathing pressure valve provided in the first embodiment
  • Figure 2 is an exploded view of the device with a breathing pressure valve provided in the first embodiment
  • Figure 3 is an exploded view of the structure of the breathing pressure valve provided in the first embodiment
  • Fig. 4 is a schematic structural diagram of a breathing pressure valve provided in the first embodiment
  • FIG. 5 is a schematic cross-sectional view of the breathing pressure valve provided in Embodiment 1;
  • Figure 6 is a cross-sectional view at A-A in Figure 1;
  • Fig. 7 is a sectional view at B-B in Fig. 1;
  • Figure 8 is a cross-sectional view at C-C in Figure 1;
  • Figure 9 is a cross-sectional view at D-D in Figure 1;
  • Figure 10 is a cross-sectional view of E-E in Figure 1;
  • Figure 11 is an enlarged view of F in Figure 9;
  • Figure 12 is an enlarged view of G in Figure 9;
  • Fig. 13 is an enlarged view of H in Fig. 10;
  • Figure 14 is an enlarged view of I in Figure 2;
  • 15 is a schematic diagram of the breathing pressure valve provided on the back cover of the motor provided in the second embodiment
  • Figure 16 is an exploded view of the structure of Figure 15;
  • Figure 17 is a front view of the inner end face of Figure 15;
  • Figure 18 is a cross-sectional view at A-A in Figure 17;
  • 19 is a schematic diagram of the breathing pressure valve provided on the rear cover of the motor provided in the third embodiment.
  • Figure 20 is an exploded view of the structure of Figure 19;
  • Figure 21 is a front view of the inner end face of Figure 19;
  • Fig. 22 is a sectional view at B-B in Fig. 21;
  • This embodiment provides a device with a breathing pressure valve.
  • the device includes a body and a breathing pressure valve arranged on the body.
  • a starter is taken as an example. Please refer to Figs. 1 to 14.
  • the inner cavity of the body of the starter is a closed space, and at least two breathing pressure valves 1 are provided on the body.
  • the breathing pressure valve 1 has a one-way check structure and at least one group is provided, and each group includes two breathing pressure valves 1 with opposite flow directions.
  • two breathing pressure valves 1 are taken as an example.
  • the two breathing pressure valves 1 are arranged on the body with opposite flow directions, thereby forming a natural suction port and an exhaust port.
  • the breathing pressure valve 1 can be installed in any suitable position of the starter body. Two installation ports are opened on the body of the starter. The two breathing pressure valves 1 are used in pairs, and the flow direction is opposite to install in the two installation ports. The breathing pressure valve 1 can be installed in any suitable position of the starter body to achieve one breath The function of automatically adjusting the pressure with one suction.
  • the breathing pressure valve 1 includes a base 2, a dustproof nut 3, a spring seat 4 and a steel ball 5.
  • the first end of the base 2 is the fixing part 6, and the second end is the connecting part 7.
  • the base 2 is provided with a connecting cavity 8 along the axial direction.
  • the side wall of the connecting cavity 8 is provided with internal threads and connected to the inner cavity 8.
  • the end wall is provided with a through hole 9 extending to the end surface of the connecting portion 7, and the connecting portion 7 is provided with an external thread.
  • the dustproof nut 3 is provided with a first inner cavity with a single opening along the axial direction.
  • the inner wall of the first inner cavity is provided with an internal thread that matches with the external thread of the base 2.
  • the dustproof nut 3 is provided with a connection between the outside and the The first ventilation hole 10 of the inner cavity of the dust nut 3 is located on the side of the dust nut 3.
  • the spring seat 4 is provided with a second inner cavity with a single opening along the axial direction.
  • the surface of the second inner cavity is provided with an external thread that matches the internal thread of the base 2.
  • the spring seat 4 A second vent 11 connecting the outside world and the inner cavity of the spring seat 4 is opened.
  • the second vent 11 is located on the side of the spring seat 4, and the end connecting the inner cavity 8 is provided with a reaming hole, so that the base 2 and the spring seat 4 There is a ventilation gap 12 therebetween, and the second ventilation hole 11 communicates with the ventilation gap 12.
  • the fixing portion 6 is provided with a third ventilation hole 61, and the third ventilation hole 61 communicates with the ventilation gap 12.
  • the steel ball 5 is arranged in the second inner cavity of the spring seat 4, and the second inner cavity of the spring seat 4 is also provided with a pressure spring 13 that acts on the steel ball 5 and pushes the steel ball 5 out.
  • the diameter of the steel ball 5 is Larger than the aperture of the through hole 9, the opening of the spring seat 4 faces the base 2 and is connected to the base 2, and the steel ball 5 is subjected to the action of the pressure spring 13 to form a spherical seal on the through hole 9.
  • a valve body sealing ring 14 is also sandwiched between the steel ball 5 and the end wall connecting the inner cavity 8, and the valve body sealing ring 14 can improve the sealing performance.
  • the spring seat 4 is provided with a rotating part 41, and the spring seat 4 is rotated by the rotating part 41 to adjust the elastic force of the pressure spring 13 and thereby set a balanced air pressure.
  • the fixing portion 6 protrudes on the surface of the connecting portion 7, and the fixing portion 6 forms a pair of clamps with the dust nut 3, and acts on the inner wall and the outer wall of the starter body, respectively.
  • the above-mentioned breathing pressure valve 1 has a simple structure and an ingenious principle. It adopts a purely mechanical structure and pressure control principle. It only needs to be installed in pairs on the body of the starter and the flow direction is reversed to realize one inhalation and one outflow.
  • the function of automatically adjusting the air pressure in the internal cavity of the machine body does not need to change the original structure of the machine body, and only needs to open two installation ports on the machine body.
  • the breathing pressure valve 1 has strong anti-soaking ability, and in a sealed state, even if the internal cavity of the machine is on fire, it can automatically extinguish the open flame in a short time after the internal cavity of the machine is hypoxic, realizing waterproof and fireproof functions.
  • the body of the starter includes a front cover 15, a middle cover 16, a casing 17, and a rear cover 18 that are sealed and connected in sequence.
  • the breathing pressure valve 1 is installed on the front cover 15, the middle cover 16. On either the cabinet 17 or the back cover 18. In this embodiment, the breathing pressure valve 1 is arranged in pairs on the back cover 18.
  • a first sealing ring 19 and a first gasket 20 are provided between the front cover 15 and the middle cover 16.
  • the front cover 15 and the middle cover 16 have a concave-convex plug-in structure.
  • 16 is provided with a first convex portion and a first concave end surface
  • the first convex portion is provided with a first groove 21 along the circumference
  • the first sealing ring 19 is arranged in the first groove 21 and contacts the inner wall of the front cover 15 to form a circumference Sealing
  • the front cover 15 is provided with a first convex end surface and a first concave portion inserted into the first convex portion
  • the first gasket 20 is sandwiched between the first convex end surface of the front cover 15 and the first concave end surface of the middle cover 16 Form a face seal between.
  • a second sealing ring 22 and a second gasket 23 are provided between the middle cover 16 and the casing 17, and the middle cover 16 and the casing 17 have a concave-convex plug-in structure.
  • 17 is provided with a second convex portion and a second concave end surface.
  • the second convex portion is provided with a second groove 24 along the circumference.
  • the second sealing ring 22 is arranged in the second groove 24 and contacts the inner wall of the middle cover 16 to form a circumference Sealing, the middle cover 16 is provided with a second convex end surface and a second concave portion inserted into the second convex portion, and the second gasket 23 is sandwiched between the second convex end surface of the middle cover 16 and the second concave end surface of the casing 17 Form a face seal between.
  • a third sealing ring 25, a fourth sealing ring 26 and a third sealing gasket 27 are provided between the casing 17 and the rear cover 18.
  • the rear cover 18 and the casing 17 is a concave-convex plug-in structure.
  • the casing 17 is also provided with a third convex portion and a third concave end surface.
  • the third convex portion is provided with a third groove 28 along the circumference, and the third sealing ring 25 is arranged in the third groove 28 And contact with the inner wall of the back cover 18 to form a circumferential seal.
  • the back cover 18 is provided with a third convex end surface and a third concave portion that is inserted and matched with the third convex portion.
  • the fourth sealing ring 26 is sandwiched on the third convex portion of the back cover 18.
  • a surface seal is formed between the end surface and the third concave end surface of the casing 17, a waterproof rib 29 is protruding from the end surface of the third convex part of the casing 17, and the third gasket 27 is pressed against the waterproof rib 29 by the back cover 18 Form a face seal.
  • a fifth seal is sandwiched between the breathing pressure valve 1 and the inner wall of the rear cover 18 and between the breathing pressure valve 1 and the outer wall of the rear cover 18.
  • Ring 30 and the fourth gasket 31 are mainly located between the fixing portion 6 of the breathing pressure valve 1 and the shell wall of the rear cover 18 and are compressed by tightening the dust nut 3.
  • the front cover 15 is connected to the one-way device 32 through the sixth sealing ring, the front cover 15 and the middle cover 16 are also provided with a switch assembly 33, the switch assembly 33, the front cover 15 and A rubber block 34 is clamped at the connection of the middle cover 16 and the rubber block 34 is provided with a waterproof pressure plate 35 (refer to Figures 7 and 8).
  • the waterproof pressure plate 35 is fixed on the front cover 15 and is simultaneously connected to the switch assembly 33 and
  • the outer wall of the middle cover 16 is in contact with the outer wall of the middle cover 16, the lead assembly 36 and the magnetic pole bolt 37 are provided on the housing 17, and the connection between the housing 17 and the lead assembly 36 and the magnetic pole bolt 37 is sealed by a seventh sealing ring respectively.
  • the cover 18 is provided with a brush holder bolt 38, and the connection between the brush holder bolt 38 and the rear cover 18 is sealed by an eighth sealing ring.
  • the above-mentioned device with a breathing pressure valve adopts a fully sealed body, and adds two breathing pressure valves 1 in conjunction with the structure, which fully guarantees the waterproof performance.
  • the setting of the breathing pressure valve 1 makes the air pressure in the body cavity balanced, and when the body When the internal high pressure expands, it can automatically exhaust.
  • the open flame can be automatically extinguished, so as to realize the functions of waterproof, fireproof and internal pressure adjustment, improve the use performance of the starter under extreme conditions, and achieve functional breakthroughs.
  • this embodiment provides a device with a breathing pressure valve.
  • the device includes a body and a breathing pressure valve arranged on the body.
  • the body of a motor is taken as an example and provided in this embodiment
  • the breathing pressure valve is suitable for a variety of motors.
  • the breathing pressure valve in the device can be installed on any part of the motor body. This embodiment uses the installation of the breathing pressure valve on the motor back cover 39 of the body as an example for detailed description.
  • the device with breathing pressure valve provided in this embodiment is suitable for a motor whose internal cavity is a closed space, and at least two breathing pressure valves are provided on the motor back cover 39.
  • the breathing pressure valve has a one-way check structure and at least one set is provided, and each group includes two breathing pressure valves with opposite flow passages.
  • This embodiment takes two breathing pressure valves as an example.
  • Two breathing pressure valves are arranged on the motor rear cover 39 in a manner opposite to the flow path, so as to realize one exhalation and one inhalation to automatically adjust the internal pressure of the motor body.
  • the breathing pressure valve here includes a valve body 100, a spring seat 4 and a steel ball 5.
  • the valve body 100 is provided with a first inner cavity with a single opening along the axial direction, and a first vent 10 extending to the outer end is provided on the end wall of the first inner cavity.
  • the spring seat 4 is provided with a second inner cavity with a single opening along the axial direction, and the end wall of the second inner cavity is provided with a second air hole 11 extending to the outer end surface.
  • the steel ball 5 is arranged in the second inner cavity of the spring seat 4, and the second inner cavity of the spring seat 4 is also provided with a pressure spring 13 that acts on the steel ball 5 and pushes the steel ball 5 out.
  • the diameter of the steel ball 5 is Larger than the aperture of the first vent 10, the opening of the spring seat 4 faces the first vent 10 and is press-fitted in the first cavity of the valve body 100.
  • the steel ball 5 is acted on by the pressure spring 13 to the first vent 10 Form a spherical seal.
  • a sealing ring 102 is sandwiched between the steel ball 5 and the inner wall of the valve body 100, and a limit groove 101 is opened on the valve body 100 at a position corresponding to the sealing ring 102 to ensure structural stability.
  • two breathing pressure valves are installed on the inner wall of the motor back cover 39.
  • Two installation cavities 391 are opened on the motor back cover 39.
  • the two breathing pressure valves are respectively installed in the corresponding installation cavities 391, and
  • the second ventilation hole 11 of one breathing pressure valve is attached to the rear cover 39 of the motor, and the second ventilation hole 11 of the other breathing pressure valve is away from the rear cover 39 of the motor.
  • valve bodies 100 of the two breathing pressure valves are respectively press-fitted in the corresponding installation cavity 391 by interference. When installing, fix the valve body 100 of the breathing pressure valve on the motor back cover 39.
  • the motor back cover 39 is provided with two air chambers 392 communicating with the flow passage of the breathing pressure valve.
  • the two air chambers 392 respectively extend from the corresponding air passages to the outer surface of the motor back cover 39 to form a natural suction port 393 and One exhaust port 394.
  • the breathing pressure valve can be integrated on the motor rear cover 39, mainly for the second vent 11 facing the motor rear cover 39 set breathing pressure valve, the breathing pressure valve does not require the valve body 100, and the spring seat 4 of the breathing pressure valve can be directly interference-fitted into a mounting cavity 391; and the second vent 11 abuts the motor rear cover 39
  • the installed breathing pressure valve is still the original design, and the valve body 100 of the breathing pressure valve is press-fitted in another installation cavity 391 by interference pressure.
  • two air chambers 392 can be connected by an air passage 395, and the air passage 395 extends to the outer surface of the motor rear cover 39 to form a vent 396 (refer to FIG. 22 ).
  • the positions of the vent 396 or the natural suction port 393 and the exhaust port 394 can be set according to actual conditions.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Abstract

一种呼吸压力阀（1）及具有呼吸压力阀（1）的装置，呼吸压力阀（1）包括：底座（2），底座（2）的第一端为固定部（6），底座（2）的第二端为连接部（7），底座（2）沿轴向开设有连接内腔（8），连接内腔（8）的侧壁上设置有内螺纹，连接部（7）上设置有外螺纹；防尘螺母（3），防尘螺母（3）上沿轴向开设有单开口的第一内腔，第一内腔的内壁上设置有与底座（2）的外螺纹配合的内螺纹，防尘螺母（3）上还开设有连通外界与第一内腔的第一透气孔（10）；弹簧座（4），弹簧座（4）上沿轴向开设有单开口的第二内腔，第二内腔设置有与底座（2）的内螺纹配合的外螺纹，弹簧座（4）上还开设有连通外界与第二内腔的第二透气孔（11）；压力弹簧（13），设于弹簧座（4）的第二内腔中；及钢球（5），钢球（5）设于第二内腔中。

Description

呼吸压力阀及具有呼吸压力阀的装置
本申请要求申请日为2019年6月27日、申请号为201910568936.7，申请日为2019年6月27日、申请号为201910570159.X，及申请日为2019年6月27日、申请号为201910568935.2的中国专利申请的优先权，上述申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电机密封技术领域，例如涉及一种呼吸压力阀及具有呼吸压力阀的装置。
背景技术
电机是一种功能性要求很高的设备，容易受外部粉尘和水的侵害，影响使用寿命，特别是环境严苛的工况下，密封性要求更高。特别是防水性要求，所以电机的内腔理想结构应为封闭结构，然而，电机在持续工作状态下会出现发热情况，内腔在密封状态下会导致内部气体膨胀，内压升高造成机体破裂，甚至在极端状态下高温发热造成电机烧毁。因此，完全密封结构存在弊端，除了需要考虑机体防水性，还要考虑到膨胀排气能力以及防火功能。
以起动机机体总成为例，该机体总成一般由分体式的前盖、中盖、机壳、后盖、单向器、开关总成和引出线总成等组成，各部件间连接处繁多，密封性难以保证，导致起动机机体总成防浸水能力差，使用寿命低。另外，在电机持续工作状态下，低密封性的结构存在高温发热燃烧而导致损毁的风险。
然而，针对上述机体结构，当保证了密封性后，还需要设置额外的排气装置配合使用，以达到调节内腔气压的效果。相关技术中存在在机壳上设置电控阀门的设计，通过配合传感器对温度和压力等参数进行监控，一旦参数的检测值异常，即控制阀门开启，达到泄压的目的，当参数的检测值正常时，再控制阀门复位关闭。此种结构控制系统较为复杂，成本高，对传感器灵敏性要求较高，故障率大，防浸水能力差，且对电机结构改造程度大，适配性不足。
发明内容
本申请提供了一种呼吸压力阀及具有呼吸压力阀的装置，在保证机体密封 性后，增加了气压调节功能，解决了完全密封结构存在的弊端，达到了防浸水设计要求。
一实施例提供了一种呼吸压力阀，包括：底座，所述底座的第一端为固定部，所述底座的第二端为连接部，所述底座沿轴向开设有连接内腔，所述连接内腔的侧壁上设置有内螺纹，且所述连接内腔的端面壁上开设有延伸至所述连接部的端面的通孔，所述连接部上设置有外螺纹；防尘螺母，所述防尘螺母上沿轴向开设有单开口的第一内腔，所述第一内腔的内壁上设置有与所述底座的外螺纹配合的内螺纹，所述防尘螺母上还开设有连通外界与所述第一内腔的第一透气孔；弹簧座，所述弹簧座上沿轴向开设有单开口的第二内腔，所述第二内腔的表面设置有与所述底座的内螺纹配合的外螺纹，所述弹簧座上还开设有连通外界与所述第二内腔的第二透气孔；压力弹簧，设置于所述弹簧座的所述第二内腔中；及钢球，所述钢球设置于所述弹簧座的所述第二内腔中，所述压力弹簧设置为将所述钢球外推，所述钢球的直径大于所述通孔的孔径，所述第二内腔的开口朝向所述底座，所述钢球设置为受所述压力弹簧的作用对所述通孔形成球面密封。
一实施例提供了一种具有呼吸压力阀的装置，包括机体和上述呼吸压力阀，所述机体设有封闭式空间的内腔，且所述机体上设置有至少两个所述呼吸压力阀，所述呼吸压力阀为单向逆止结构且所述至少两个呼吸压力阀中的每两个以流向相反的方式布置于所述机体上。
一实施例提供了一种呼吸压力阀，包括：阀体，所述阀体上沿轴向开设有单开口的第一内腔，所述第一内腔的端面壁上开设有延伸至外端面的第一透气孔；弹簧座，所述弹簧座上沿轴向开设有单开口的第二内腔，所述第二内腔的端面壁上开设有延伸至外端面的第二透气孔；压力弹簧，设置于所述第二内腔中；钢球，所述钢球设置于所述第二内腔中，所述压力弹簧设置为将所述钢球外推，所述钢球的直径大于所述第一透气孔的孔径，所述弹簧座的开口朝向所述第一透气孔且过盈压装于所述阀体的所述第一内腔中，所述钢球设置为受所述压力弹簧的作用对所述第一透气孔形成球面密封。
一实施例提供了一种具有呼吸压力阀的装置，包括机体和上述呼吸压力阀，所述机体设有封闭式空间的内腔，且所述机体上设置有至少两个所述呼吸压力阀，所述呼吸阀为单向逆止结构且所述至少两个呼吸阀中的每两个以流道方向相反的方式布置于所述机体上。
附图说明
图1是实施例一提供的具有呼吸压力阀的装置针对的起动机机体的结构示意图；
图2是实施例一提供的具有呼吸压力阀的装置的爆炸图；
图3是实施例一提供的呼吸压力阀的结构爆炸图；
图4是实施例一提供的呼吸压力阀的结构示意图；
图5是实施例一提供的呼吸压力阀的剖面示意图；
图6是图1中A-A处剖面图；
图7是图1中B-B处剖面图；
图8是图1中C-C处剖面图；
图9是图1中D-D处剖面图；
图10是图1中E-E处剖面图；
图11是图9中F处放大图；
图12是图9中G处放大图；
图13是图10中H处放大图；
图14是图2中I处放大图；
图15是实施例二提供的呼吸压力阀设置于电机后盖上的示意图；
图16是图15的结构爆炸图；
图17是图15的内端面正视图；
图18是图17中A-A处剖面图；
图19是实施例三提供的呼吸压力阀设置于电机后盖上的示意图；
图20是图19的结构爆炸图；
图21是图19的内端面正视图；
图22是图21中B-B处剖面图。
图中：
1-呼吸压力阀；100-阀体；101-限位槽；102-密封圈；2-底座；3-防尘螺母；4-弹簧座；41-旋转部；5-钢球；6-固定部；61-第三透气孔；7-连接部；8-连接内腔；9-通孔；10-第一透气孔；11-第二透气孔；12-透气间隙；13-压力弹簧；14-阀体密封圈；15-前盖；16-中盖；17-机壳；18-后盖；19-第一密封圈；20-第一密封垫；21-第一凹槽；22-第二密封圈；23-第二密封垫；24-第 二凹槽；25-第三密封圈；26-第四密封圈；27-第三密封垫；28-第三凹槽；29-防水筋；30-第五密封圈；31-第四密封垫；32-单向器；33-开关总成；34-橡胶块；35-防水压板；36-引出线总成；37-磁极螺栓；38-刷架螺栓；39-电机后盖；391-安装腔；392-气腔；393-自然吸气口；394-排气口；395-气道；396-通气口。
具体实施方式
实施例一
本实施例提供一种具有呼吸压力阀的装置，该装置包括机体和设置在机体上的呼吸压力阀。本实施例以起动机为例，请参阅图1至图14所示，该起动机的机体的内腔为封闭式空间，且机体上设置有至少两个呼吸压力阀1。在一实施例中，呼吸压力阀1为单向逆止结构且至少设置一组，每组包括两个流向相反设置的呼吸压力阀1。本实施例以两个呼吸压力阀1为例，两个呼吸压力阀1以流向相反地方式布置于机体上，从而形成一个自然吸气口和一个排气口。
安装时，呼吸压力阀1可以安装于起动机机体的任意合适位置。在起动机的机体上开设两个安装口，两个呼吸压力阀1成对使用，且流向相反安装在两个安装口内，呼吸压力阀1可以安装于起动机机体的任意合适位置，实现一呼一吸自动调节压力的功能。
如图3和图4所示，该呼吸压力阀1包括底座2、防尘螺母3、弹簧座4和钢球5。
底座2的第一端为固定部6，第二端为连接部7，底座2沿轴向开设有连接内腔8，连接内腔8的侧壁上设置有内螺纹，且连接内腔8的端面壁上开设有延伸至连接部7端面的通孔9，连接部7上设置有外螺纹。
防尘螺母3上沿轴向开设有单开口的第一内腔，该第一内腔的内壁上设置有与底座2的外螺纹配合的内螺纹，防尘螺母3上开设有连通外界与防尘螺母3的内腔的第一透气孔10，第一透气孔10位于防尘螺母3的侧面上。
如图3-图5所示，弹簧座4上沿轴向开设有单开口的第二内腔，该第二内腔的表面设置有与底座2的内螺纹配合的外螺纹，弹簧座4上开设有连通外界与弹簧座4的内腔的第二透气孔11，第二透气孔11位于弹簧座4的侧面上，连接内腔8的端部设置有扩孔，使得底座2与弹簧座4之间存在透气间隙12，第二透气孔11与透气间隙12连通。固定部6上开设有第三透气孔61，第三透气孔61与透气间隙12连通。
钢球5设置于弹簧座4的第二内腔中，且弹簧座4的第二内腔中还设置有作用于钢球5并将钢球5外推的压力弹簧13，钢球5的直径大于通孔9的孔径，弹簧座4的开口朝向底座2并与底座2连接，钢球5受压力弹簧13的作用对通孔9形成球面密封。钢球5与连接内腔8的端面壁之间还夹设有阀体密封圈14，阀体密封圈14能够提高密封性能。弹簧座4上设置有旋转部41，通过旋转部41使弹簧座4旋转以调节压力弹簧13的弹力，进而设定平衡气压。
固定部6凸起于连接部7的表面，固定部6与防尘螺母3形成对夹，且分别作用于起动机机体的内壁和外壁上。
综上，上述呼吸压力阀1的结构简单，原理巧妙，采用纯机械结构加压力控制原理，只需在起动机的机体上成对且流向相反安装使用，即可实现一个吸气，一个出气而自动调节机体内腔气压的功能，无需改变机体的原有结构，只需在机体上开设两个安装口即可。另外，该呼吸压力阀1防浸水能力强，且在密封状态下即使机体内腔起火也能在短时间内致使机体内腔缺氧后自动灭明火，实现防水及防火功能。
在一实施例中，如图1所示，该起动机的机体包括依次密封连接的前盖15、中盖16、机壳17和后盖18，呼吸压力阀1安装于前盖15、中盖16、机壳17或后盖18中的任一个上。本实施例中呼吸压力阀1成对地设置于后盖18上。
如图2、图9以及图11所示，前盖15与中盖16之间设置有第一密封圈19和第一密封垫20，前盖15与中盖16呈凹凸插接结构，中盖16设有第一凸部及第一凹端面，第一凸部沿圆周开设有第一凹槽21，第一密封圈19设置于第一凹槽21中且与前盖15的内壁接触形成圆周密封，前盖15设有第一凸端面及与第一凸部插接的第一凹部，第一密封垫20夹设于前盖15的第一凸端面与中盖16的第一凹端面之间形成面密封。
如图2、图9以及图12所示，中盖16与机壳17之间设置有第二密封圈22和第二密封垫23，中盖16与机壳17呈凹凸插接结构，机壳17设有第二凸部及第二凹端面，第二凸部沿圆周开设有第二凹槽24，第二密封圈22设置于第二凹槽24中且与中盖16的内壁接触形成圆周密封，中盖16设有第二凸端面及与第二凸部插接的第二凹部，第二密封垫23夹设于中盖16的第二凸端面与机壳17的第二凹端面之间形成面密封。
如图2、图10、图13以及图14所示，机壳17与后盖18之间设置有第三密封圈25、第四密封圈26和第三密封垫27，后盖18与机壳17呈凹凸插接结构，机壳17 还设有第三凸部及第三凹端面，第三凸部沿圆周开设有第三凹槽28，第三密封圈25设置于第三凹槽28中且与后盖18的内壁接触形成圆周密封，后盖18设有第三凸端面及与第三凸部插接配合的第三凹部，第四密封圈26夹设于后盖18的第三凸端面与机壳17的第三凹端面之间形成面密封，机壳17的第三凸部的端面上凸起有防水筋29，第三密封垫27由后盖18压紧于防水筋29上形成面密封。
本实施例中，如图2和图6所示，呼吸压力阀1与后盖18的内壁之间及呼吸压力阀1与后盖18的外壁之间中的至少一处夹设有第五密封圈30和第四密封垫31。在一实施例中，第五密封圈30和第四密封垫31主要位于呼吸压力阀1的固定部6与后盖18的壳壁之间，且通过旋紧防尘螺母3压紧。
如图2所示，前盖15上通过第六密封圈连接有单向器32，前盖15上与中盖16的连接处还设置有开关总成33，开关总成33、前盖15及中盖16三者的连接处夹设有橡胶块34，橡胶块34外设置有防水压板35(参考图7和图8)，防水压板35固定于前盖15上且同时与开关总成33和中盖16的外壁接触，机壳17上设置有引出线总成36和磁极螺栓37，且机壳17与引出线总成36和磁极螺栓37的连接处分别通过一个第七密封圈密封，后盖18上设置有刷架螺栓38且所述刷架螺栓38与所述后盖18的连接处通过第八密封圈密封。
综上，上述具有呼吸压力阀的装置采用机体全密封，并增加两个呼吸压力阀1配合使用的结构，充分保证了防水性能，同时呼吸压力阀1的设置使得机体内腔气压平衡，当机体内部高压膨胀时能够自动排气，当机体内部燃烧起火时瞬间缺氧自动灭明火，从而实现防水、防火及调节内压的功能，提升起动机在极端状态下的使用性能，实现功能性突破。
实施例二：
请参阅图15至图18，本实施例提供一种具有呼吸压力阀的装置，该装置包括机体和设置于机体上的呼吸压力阀，本实施例中以电机的机体为例且本实施例提供的呼吸压力阀适用于多种电机，通过在电机的机体上安装呼吸压力阀能够有效调节电机机体的内腔气压，解决电机全密封结构存在的弊端，以提高电机防水性能。该装置中的呼吸压力阀可以安装在电机机体上的任意部位，本实施例以将呼吸压力阀安装于机体的电机后盖39为例进行详述。
本实施例提供的具有呼吸压力阀的装置适用于机体内腔为封闭式空间的电机，且电机后盖39上设置有至少两个呼吸压力阀。在一实施例中，呼吸压力阀 为单向逆止结构且至少设置一组，每组包括两个流道相反设置为的呼吸压力阀，本实施例以两个呼吸压力阀为例。两个呼吸压力阀以流道方向相反地方式布置于电机后盖39上，从而实现一个呼气，一个吸气地自动调节电机机体的内压。
如图16所示，此处的呼吸压力阀包括阀体100、弹簧座4和钢球5。
阀体100上沿轴向开设有单开口的第一内腔，第一内腔的端面壁上开设有延伸至外端面的第一透气孔10。
弹簧座4上沿轴向开设有单开口的第二内腔，第二内腔的端面壁上开设有延伸至外端面的第二透气孔11。
钢球5设置于弹簧座4的第二内腔中，且弹簧座4的第二内腔中还设置有作用于钢球5并将钢球5外推的压力弹簧13，钢球5的直径大于第一透气孔10的孔径，弹簧座4的开口朝向第一透气孔10且过盈压装于阀体100的第一内腔中，钢球5受压力弹簧13作用对第一透气孔10形成球面密封。
为了保证密封效果，钢球5与阀体100的内壁之间夹设有密封圈102，阀体100上对应密封圈102的位置开设有限位槽101，以保证结构稳定。
如图18所示，两个呼吸压力阀安装于电机后盖39的内壁上，电机后盖39上开设有两个安装腔391，两个呼吸压力阀分别安装于对应的安装腔391中，且一个呼吸压力阀的第二透气孔11贴靠在电机后盖39上，另一个呼吸压力阀的第二透气孔11远离电机后盖39。
两个呼吸压力阀的阀体100分别过盈压装于对应的安装腔391中。安装时，将呼吸压力阀的阀体100固定于电机后盖39上即可。
电机后盖39上开设有两个与呼吸压力阀的流道连通的气腔392，两个气腔392分别由对应的气道延伸至电机后盖39的外表面形成一个自然吸气口393和一个排气口394。
实施例三：
请参阅图19至图22，在实施例二的基础上，考虑到呼吸压力阀的结构，可以将呼吸压力阀集成于电机后盖39上，主要是针对第二透气孔11背对电机后盖39设置的呼吸压力阀，该呼吸压力阀无需阀体100，可以将该呼吸压力阀的弹簧座4直接过盈压装于一个安装腔391中；而第二透气孔11贴靠电机后盖39设置的呼吸压力阀仍为原来设计，将该呼吸压力阀的阀体100过盈压装于另一个安装腔391中。
安装时，将第二透气孔11贴靠电机后盖39设置的呼吸压力阀的阀体100固定于电机后盖39上，而将第二透气孔11背对电机后盖39的呼吸压力阀的弹簧座4装配好钢球5后直接固定于电机后盖39上即可，安装简单，集成体积小，对电机原本结构几乎无影响。
此外，还可以在实施例二的基础上变形的是，两个气腔392可以由一个气道395连通，且气道395延伸至电机后盖39的外表面形成一个通气口396(参考图22)。
通气口396或者自然吸气口393及排气口394的位置均可以根据实际情况设置。

Claims (25)

  1. 一种呼吸压力阀，包括：
    底座，所述底座的第一端为固定部，所述底座的第二端为连接部，所述底座沿轴向开设有连接内腔，所述连接内腔的侧壁上设置有内螺纹，且所述连接内腔的端面壁上开设有延伸至所述连接部的端面的通孔，所述连接部上设置有外螺纹；
    防尘螺母，所述防尘螺母上沿轴向开设有单开口的第一内腔，所述第一内腔的内壁上设置有与所述底座的外螺纹配合的内螺纹，所述防尘螺母上还开设有连通外界与所述第一内腔的第一透气孔；
    弹簧座，所述弹簧座上沿轴向开设有单开口的第二内腔，所述第二内腔设置有与所述底座的内螺纹配合的外螺纹，所述弹簧座上还开设有连通外界与所述第二内腔的第二透气孔；
    压力弹簧，设置于所述弹簧座的所述第二内腔中；及
    钢球，所述钢球设置于所述弹簧座的所述第二内腔中，所述压力弹簧设置为将所述钢球外推，所述钢球的直径大于所述通孔的孔径，所述第二内腔的开口朝向所述底座，所述钢球设置为受所述压力弹簧的作用对所述通孔形成球面密封。
  2. 根据权利要求1所述的呼吸压力阀，其中，所述第二透气孔位于所述弹簧座的侧面上，所述连接内腔的端部设置有扩孔，所述扩孔设置为使所述底座与所述弹簧座之间形成透气间隙，所述第二透气孔与所述透气间隙连通。
  3. 根据权利要求2所述的呼吸压力阀，其中，所述固定部上开设有第三透气孔，所述第三透气孔与所述透气间隙连通。
  4. 根据权利要求1所述的呼吸压力阀，还包括设置于所述弹簧座上的旋转部，所述旋转部设置为使所述弹簧座旋转以调节所述压力弹簧的弹力。
  5. 根据权利要求1所述的呼吸压力阀，还包括阀体密封圈，所述阀体密封圈夹设于所述钢球与所述连接内腔的端面壁之间。
  6. 根据权利要求1所述的呼吸压力阀，其中，所述第一透气孔位于所述防尘螺母的侧面上。
  7. 根据权利要求1所述的呼吸压力阀，其中，所述固定部凸起于所述连接部的表面，所述固定部与所述防尘螺母形成对夹。
  8. 一种具有呼吸压力阀的装置，包括机体及如权利要求1-7任一项所述的呼吸压力阀，所述机体设有封闭式空间的内腔，且所述机体上设置有至少两个所 述呼吸压力阀，所述呼吸压力阀为单向逆止结构且所述至少两个呼吸压力阀中的每两个以流向相反的方式布置于所述机体上。
  9. 根据权利要求8所述的具有呼吸压力阀的装置，其中，所述呼吸压力阀至少设置一组，每组所述呼吸压力阀包括两个流向相反设置的所述呼吸压力阀。
  10. 根据权利要求8所述的具有呼吸压力阀的装置，其中，所述机体包括依次密封连接的前盖、中盖、机壳和后盖，所述呼吸压力阀安装于所述前盖、所述中盖、所述机壳或所述后盖中的任一个上。
  11. 根据权利要求10所述的具有呼吸压力阀的装置，还包括夹设于所述前盖与所述中盖之间的第一密封圈和第一密封垫，所述前盖与所述中盖呈凹凸插接结构，所述中盖设有第一凸部及第一凹端面，所述第一凸部沿圆周开设有第一凹槽，所述第一密封圈设置于所述第一凹槽中且与所述前盖的内壁接触形成圆周密封，所述前盖设有第一凸端面及与所述第一凸部插接的第一凹部，所述第一密封垫夹设于所述前盖的第一凸端面与所述中盖的第一凹端面之间形成面密封。
  12. 根据权利要求11所述的具有呼吸压力阀的装置，还包括夹设于所述中盖与所述机壳之间的第二密封圈和第二密封垫，所述中盖与所述机壳呈凹凸插接结构，所述机壳设有第二凸部及第二凹端面，所述机壳的第二凸部沿圆周开设有第二凹槽，所述第二密封圈设置于所述第二凹槽中且与所述中盖的内壁接触形成圆周密封，所述中盖设有第二凸端面及与所述第二凸部插接的第二凹部，所述第二密封垫夹设于所述中盖的第二凸端面与所述机壳的第二凹端面之间形成面密封。
  13. 根据权利要求12所述的具有呼吸压力阀的装置，还包括夹设于所述机壳与所述后盖之间的第三密封圈、第四密封圈和第三密封垫，所述后盖与所述机壳呈凹凸插接结构，所述机壳还设有第三凸部及第三凹端面，所述机壳的第三凸部沿圆周开设有第三凹槽，所述第三密封圈设置于所述第三凹槽中且与所述后盖的内壁接触形成圆周密封，所述后盖设有第三凸端面及与所述第三凸部插接配合的第三凹部，所述第四密封圈夹设于所述后盖的第三凸端面与所述机壳的第三凹端面之间形成面密封，所述机壳的第三凸部的端面上凸起有防水筋，所述第三密封垫设置为压紧于所述后盖与所述防水筋之间形成面密封。
  14. 根据权利要求13所述的具有呼吸压力阀的装置，还包括第五密封圈和第四密封垫，所述呼吸压力阀成对地设置于所述后盖上，且所述呼吸压力阀与所 述后盖的内壁之间及所述呼吸压力阀与所述后盖的内壁之间中的至少一处夹设有所述第五密封圈和所述第四密封垫。
  15. 根据权利要求14所述的具有呼吸压力阀的装置，其中，所述机体还包括：
    单向器和第六密封圈，所述单向器与所述前盖连接且所述第六密封圈夹设于所述单向器与所述前盖之间；
    开关总成和橡胶块，所述开关总成设置于所述前盖与所述中盖的连接处，所述橡胶块夹设于所述开关总成、所述前盖及所述中盖三者的连接处；
    防水压板，设置于所述橡胶块外且固定于所述前盖上，所述防水压板同时与所述开关总成和所述中盖的外壁接触；
    引出线总成、磁极螺栓和两个第七密封圈，所述引出线总成与所述机壳连接，所述磁极螺栓与所述机壳连接，一个所述第七密封圈密封于所述引出线总成与所述机壳的连接处，另一个所述第七密封圈密封于所述磁极螺栓与所述机壳的连接处；及
    刷架螺栓和第八密封圈，所述刷架螺栓与所述后盖连接且所述第八密封圈密封于所述刷架螺栓与所述后盖的连接处。
  16. 一种呼吸压力阀，包括：
    阀体，所述阀体上沿轴向开设有单开口的第一内腔，所述第一内腔的端面壁上开设有延伸至外端面的第一透气孔；
    弹簧座，所述弹簧座上沿轴向开设有单开口的第二内腔，所述第二内腔的端面壁上开设有延伸至外端面的第二透气孔；
    压力弹簧，设置于所述第二内腔中；
    钢球，所述钢球设置于所述第二内腔中，所述压力弹簧设置为将所述钢球外推，所述钢球的直径大于所述第一透气孔的孔径，所述弹簧座的开口朝向所述第一透气孔且过盈压装于所述阀体的所述第一内腔中，所述钢球设置为受所述压力弹簧的作用对所述第一透气孔形成球面密封。
  17. 根据权利要求16所述的呼吸压力阀，其中，所述钢球与所述阀体的内壁之间夹设有密封圈。
  18. 根据权利要求17所述的呼吸压力阀，其中，所述阀体上对应所述密封圈的位置开设有限位槽。
  19. 一种具有呼吸压力阀的装置，包括机体及如权利要求16-18中任一项所述的呼吸压力阀，所述机体设有封闭式空间的内腔，且所述机体上至少设置有 两个所述呼吸压力阀，所述呼吸阀为单向逆止结构且所述至少两个呼吸阀中的每两个以流道方向相反的方式布置于所述机体上。
  20. 根据权利要求19所述的具有呼吸压力阀的装置，其中，所述呼吸压力阀的个数为两个，所述两个呼吸压力阀以流道相反的方式设置于所述机体上。
  21. 根据权利要求20所述的具有呼吸压力阀的装置，其中，两个所述呼吸压力阀安装于所述机体的内壁上，所述两个呼吸压力阀包括第一呼吸压力阀和第二呼吸压力阀，所述机体上开设有两个安装腔，所述两个安装腔包括第一安装腔和第二安装腔，所述第一呼吸压力阀安装于所述第一安装腔中，所述第二呼吸压力阀安装于所述第二安装腔中，且所述第一呼吸压力阀的所述第二透气孔贴靠所述机体，所述第二呼吸压力阀的所述第二透气孔远离所述机体。
  22. 根据权利要求21所述的具有呼吸压力阀的装置，其中，两个所述呼吸压力阀的阀体分别过盈压装于对应的所述安装腔中。
  23. 根据权利要求21所述的具有呼吸压力阀的装置，其中，所述第一呼吸压力阀的所述阀体过盈压装于所述第一安装腔中，所述第二呼吸压力阀设置为去除所述阀体后将所述弹簧座过盈压装于所述第二安装腔中。
  24. 根据权利要求21所述的具有呼吸压力阀的装置，其中，所述机体上开设有两个分别与所述两个呼吸压力阀的流道连通的气腔，两个所述气腔由对应的气道延伸至所述机体的外表面形成一个自然吸气口和一个排气口。
  25. 根据权利要求21所述的具有呼吸压力阀的装置，其中，所述机体上开设有两个分别与所述两个呼吸压力阀的流道连通的气腔，所述两个气腔由一个气道连通，且所述气道延伸至所述机体的外表面形成通气口。
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