WO2009015529A1 - Soupape d'échappement automatique à papillon pour autocuiseur - Google Patents

Soupape d'échappement automatique à papillon pour autocuiseur Download PDF

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Publication number
WO2009015529A1
WO2009015529A1 PCT/CN2007/003631 CN2007003631W WO2009015529A1 WO 2009015529 A1 WO2009015529 A1 WO 2009015529A1 CN 2007003631 W CN2007003631 W CN 2007003631W WO 2009015529 A1 WO2009015529 A1 WO 2009015529A1
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WO
WIPO (PCT)
Prior art keywords
bimetal
exhaust port
steam
steamer
temperature
Prior art date
Application number
PCT/CN2007/003631
Other languages
English (en)
French (fr)
Inventor
Chia-Yi Hsu
Original Assignee
Chia-Yi Hsu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chia-Yi Hsu filed Critical Chia-Yi Hsu
Publication of WO2009015529A1 publication Critical patent/WO2009015529A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/09—Safety devices
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation

Definitions

  • the invention relates to the technical field of temperature control valves, in particular to a steaming device exhaust valve device with two kinds of exhaust gas flow, which is suitable for removing the air inside the steaming device at a large flow rate when the steaming device is started, and is filled inside the steaming device.
  • a steaming device exhaust valve device with two kinds of exhaust gas flow, which is suitable for removing the air inside the steaming device at a large flow rate when the steaming device is started, and is filled inside the steaming device.
  • the exhaust port is closed to isolate the steam environment inside the steamer from the atmospheric environment, or the exhaust port diameter is automatically reduced to reduce the steam discharge amount, which is beneficial to save steam and steam control internal gas-liquid two-phase steam environment control and energy saving.
  • the main object of the present invention is to disclose an automatic throttle exhaust valve device for a steamer that automatically closes the exhaust valve when the interior of the steamer is filled with steam to eliminate unnecessary steam escape.
  • Another object of the present invention is to disclose a steaming device automatic throttle exhaust valve device, which is filled with steam inside the steamer, automatically controls the steam discharge amount, reduces energy and water waste, and achieves the purpose of energy saving and water saving.
  • a further object of the present invention is to disclose a steaming device automatic throttle exhaust valve device, which has a built-in electric switch device, and activates the built-in when the steamer is filled with steam, automatically shuts off or automatically controls the steam discharge amount.
  • the utility model relates to a steaming device automatic throttle exhaust valve device, which comprises an exhaust port, a throttle exhaust port and a temperature control actuator;
  • the temperature-controlled actuator comprises a base, a cover, a temperature-controlled bimetal, and a temperature-controlled bimetal in the chamber enclosing the bimetal in the cover and the cover;
  • Intake hole, base has exhaust port, exhaust port inside setting
  • the vent of the bimetal has a vent
  • the shape of the bimetal is reversed, pressed against the '0' seal, and the exhaust port is closed to isolate the steam environment inside the steamer from the atmosphere.
  • the steamer automatic throttle exhaust valve device has a throttle outlet at the center of the bimetal, and the orifice of the throttle outlet is smaller than the aperture of the exhaust port, and when the vapor temperature of the exhaust reaches the rated value
  • the shape of the bimetal is reversed, it is pressed against the '0'-shaped seal ring, the exhaust port is closed, and the vapor is discharged from the throttle exhaust port at the center of the bimetal to perform throttling exhaust.
  • the steamer automatic throttle exhaust valve device further includes an electric switch device. Inside the base, a push type electric switch device is disposed between the base and the '0'-shaped seal ring, and the electric switch device is The connector is electrically connected to a controller of the steam generator;
  • the push type electric switch device is normally open circuit, and is composed of a circular circuit board printed with a conductor pattern and a covered conductive rubber sleeve.
  • the conductive rubber sleeve is a gas-tight structure, and the inside is filled with dry air to form an air spring, conductive rubber.
  • the sleeve When the sleeve is pressed, it is pressed on the conductor track printed on the circular circuit board to make the conductor line conductive, and the conduction signal is transmitted to the controller of the steam generator through the connector to start the steam cooking process.
  • the steaming device automatically throttles the exhaust valve device, and the electric shut-off device, when the steam temperature of the exhaust port reaches the rated value, the shape of the bimetal is reversed and pressed on the '0'-shaped sealing ring, The exhaust port is closed or the throttling exhaust is performed with the throttle exhaust port, and the push type electric switch device is pressed to be turned on, and then the controller starts the steam control program.
  • the steamer automatic throttle exhaust valve device wherein the conductive rubber sleeve is internally provided with a return spring piece.
  • the steamer automatic throttle exhaust valve device has a venting opening at a periphery of the bimetal, and is uniformly distributed in the shape of a curved notch, or a circular hole is formed in a periphery of the bimetal.
  • Steamer automatic throttle exhaust valve device can be installed in any steamer using water, especially pressure cooker, the air will be discharged at the beginning of cooking, which will significantly reduce the pressure on the pressure cooker.
  • Cover, bimetal, air outlet adjustment device can be disassembled for cleaning, which is convenient for use in cooking pots and needs to be cleaned frequently.
  • the bimetal device can be replaced to suit the needs of different altitude areas.
  • the steaming device with built-in electric switch device automatically throttles the exhaust wide door device, which makes the steamer control automation easier to implement and more effectively improve the steamer efficiency.
  • Figure 1 (a) is an explanatory view showing an embodiment of a steaming device automatic throttle exhaust valve device of the present invention
  • Figure 1 (b) is a cross-sectional view taken along line A-A of Figure 1 (a);
  • Figure 2 (a) is an explanatory view showing another embodiment of the steamer automatic throttle exhaust wide door device of the present invention.
  • Figure 2 (b) is a cross-sectional view taken along line B-B of Figure 2 (a);
  • Figure 3 (a) is an explanatory view showing an embodiment of a steamer automatic throttle exhaust valve device of the built-in electric switch device of the present invention
  • Figure 3 (b) is a cross-sectional view taken along line C-C of Figure 3 (a);
  • Figure 4 is a diagram showing the shape reversal of the bimetal of the steamer automatic throttle exhaust valve device of the built-in electric switch device of the present invention when the vapor temperature reaches the design value;
  • Figure 5 (a) is an explanatory view showing another embodiment of the steamer automatic throttle exhaust valve device of the built-in electric switch device of the present invention.
  • Figure 5 (b) is a cross-sectional view taken along line D-D of Figure 5 (a);
  • Fig. 6 is an explanatory view showing an embodiment of a steamer automatic throttle exhaust valve device of the built-in electric switch device of the present invention applied to an energy-saving water-saving steamer. detailed description
  • the steam escaped by the steamer must be eliminated or controlled.
  • the steamer in the initial stage, the steam will gradually fill the inside of the steamer.
  • the air in the steamer is squeezed out by the steam.
  • the steam Because the steam is lighter, the steam will gradually occupy the lower part of the steamer from the upper part of the steamer.
  • the saturated steam temperature and pressure are actually two sides.
  • the boiling point of water is the temperature at which the saturated steam pressure is equal to the atmospheric pressure. Under normal atmospheric pressure, when the air in the steamer is completely extruded by steam, the steamer The temperature inside can reach the boiling temperature.
  • the device can automatically close the exhaust port or automatically reduce the exhaust port diameter and reduce the steam discharge. It will be of great help to the energy saving, water saving and practicality of steamer.
  • the invention discloses a steamer automatic throttle exhaust valve device.
  • the exhaust port or the automatic shrinkage and exhaust diameter can be automatically closed to reduce the steam discharge amount.
  • the steamer When the air in the steamer is completely squeezed out by the steam, the steamer automatically closes the exhaust port or automatically reduces the exhaust port diameter. After reducing the steam discharge amount, the steam supply of the steamer should also be adjusted and controlled, and the steam supply can be adjusted. Control work can be done manually or automatically. In order to achieve automatic control of some electrified steamers, the present invention also discloses a steamer automatic throttle exhaust valve device with a built-in electric switch.
  • FIG. 1 is an explanatory view showing an embodiment of an automatic throttle and exhaust valve device of a steamer according to the present invention, wherein Fig. 1a is a sectional view of the automatic throttle and exhaust valve device of the steamer of the present invention; Fig. 1 (b) is Fig. 1 (a) The A-A profile in the middle shows the shape of the bimetal.
  • the steamer automatic throttle exhaust valve device 10 is a temperature controlled and actuated vapor valve device, which mainly comprises an exhaust port 34, a throttle exhaust port 31, and a temperature control actuator Z;
  • the control actuator Z includes a base 21, a cover 28, a temperature-controlled bimetal 30, and a temperature-controlled bimetal in the chamber 22 enclosing the bimetal surrounded by the base and the cover;
  • the cover 28 has an air inlet 29, the base 21 has an exhaust port 34, the inside of the exhaust port 34 is provided with a '0'-shaped seal ring 27, and the bimetal 30 has a vent 33 at its periphery;
  • the base 21 is provided with a nut 23 and
  • the rubber washer 24 is fixed on the steamer wall 25, and the inside of the exhaust port 34 of the base 21 is provided with a '0'-shaped seal ring 27;
  • the vapor enters the chamber 22 for accommodating the bimetal through the air inlet hole 29 of the cover 28, passing through The vent 33 of the bimetal
  • the temperature control bimetal 30 is normally shaped away from '0'.
  • the steam begins to drain from the throttling vent 31 at the center of the bimetal.
  • Figure 1 (b) is a bimetal structure diagram
  • the center of the bimetal 30 has a throttling exhaust port 31
  • the outer edge of the bimetal 30 has a vent 33
  • the shape of the vent 33 can be
  • the curved notch shown may also be a circular hole.
  • the bimetal 30 rated actuation temperature can be designed at 93 degrees Celsius
  • the rated recovery temperature can be designed at 65 degrees Celsius
  • the rated temperature difference is 28 degrees Celsius
  • the restoration can also be designed as a manual reset. Type.
  • the bimetal device can be replaced.
  • the bimetal piece with the rated closing temperature slightly lower than the boiling temperature of the local water is selected, and the throttling exhaust port 31 is further reduced to increase
  • the pressure difference between the inside and outside of the steamer is suitable for the needs of high altitude areas.
  • FIG 2 is an explanatory view showing another embodiment of the steamer automatic throttle exhaust valve device of the present invention, wherein Figure 2 (a) is a sectional view of the steamer automatic throttle exhaust valve device of the present invention; Figure 2 (b) It is a B-B cross-sectional view in Figure 2 (a) showing the shape of the bimetal.
  • the steamer automatic throttle exhaust valve device 100 mainly comprises a base 21, and a double gold is accommodated
  • the chamber 22 is a temperature-controlled bimetal 130; the base 21 and the cover 28 enclose a chamber 22 for accommodating the bimetal, and the base 21 is fixed to the steamer wall by a nut 23 and a rubber gasket 24.
  • the temperature-controlled bimetal 130 is enclosed in the chamber 22 of the base 21 and the cover 28 for accommodating the bimetal; the base 21 has an exhaust port 34, and the cover 28 has an air inlet 29 therein.
  • the temperature-controlled bimetal 130 has a vent 33 at the periphery thereof; the inside of the vent 21 of the susceptor 21 is provided with a '0'-shaped seal ring 27; the vapor enters the chamber 22 for accommodating the bimetal via the air inlet hole 29 of the cover 28, and is worn.
  • the vent 33 passing through the periphery of the bimetal 130 leads to the exhaust port 34, and the exhaust port 34 of the base 21 has an exhaust port adjusting device 32 capable of adjusting the amount of exhaust gas.
  • the bimetal 130 is normally shaped away from the '0' shape.
  • Figure 2 (b) is a structural view of the bimetal 130.
  • the outer edge of the bimetal 130 is provided with a vent 33.
  • the bimetal 130 can be designed to be at a temperature of 93 degrees Celsius, and the rated recovery temperature can be designed at 65 degrees Celsius. The temperature difference is 28 degrees Celsius, and the recovery can also be designed as a manual reset type.
  • the bimetal device can be replaced. For example, in the plateau area, a bimetal with a rated closing temperature slightly lower than the boiling temperature of the local water is selected to meet the needs of high altitude areas.
  • the temperature control valve is a process well known to those skilled in the art, such as the bimetal temperature control valve described in U.S. Patent No. 2,271,850, US Pat.
  • the steamer automatic throttle exhaust valve device of the invention is a temperature control valve, the cover has an air inlet hole, the temperature control bimetal center has a throttle exhaust port, and the periphery has a vent; the temperature control
  • the bimetal 30 has three functions of temperature control actuation, exhaust passage and throttling exhaust.
  • the structure is simple and direct, easy to disassemble and clean, and is suitable for daily steaming applications.
  • the bimetal actuation - the temperature should be set slightly below the boiling point temperature of the water, if necessary, the temperature control bimetal, as the altitude changes, it is easy to replace.
  • the exhaust port and the diameter of the throttling exhaust port are determined according to actual needs.
  • the diameter of the throttling exhaust port is smaller than the hole diameter of the exhaust port. The minimum can be zero. When the orifice of the throttling exhaust port is zero, it is applicable. After the steam is filled with the steamer, the exhaust port needs to be completely closed.
  • the steamer automatic throttle exhaust wide door device of the invention is further provided with an electric switch device for automatic control of some electrification steamers.
  • FIG. 3 is an explanatory view showing an embodiment of a steamer automatic throttle exhaust valve device of the built-in electric shut-off device of the present invention, wherein FIG. 3(a) is a cross-sectional view of the steamer automatic throttle exhaust valve device of the present invention; Figure 3 (b) is a CC cross-sectional view of Figure 3 (a) showing the shape of the bimetal.
  • the steamer automatic throttle exhaust valve device 90 of the built-in electric switch device of the present invention is a temperature-controlled steam valve device, which mainly comprises a base 21, a cavity 22 for accommodating bimetal.
  • the base 21 is fixed to the wall 25 by a nut 23 and a rubber washer 24, and the base 21 is internally pressed.
  • the switch device 26 and the '0'-shaped seal ring 27, the push-type switch device 26 is a gas-tight switch device that accommodates the outside of the chamber of the push-type switch device 26, leaving the push-type switch device 26 extended when pressed
  • the space 37, the cover 28 and the base 21 enclose a chamber 22 for accommodating the bimetal, the cover 28 has an air inlet hole 29, and the cavity 22 for accommodating the bimetal has a bimetal 30 inside.
  • 21 air outlet 34 has an air outlet adjusting device 32 capable of adjusting the size of the air outlet.
  • the normal shape of the bimetal 30 is away from the '0'-shaped sealing ring 27, and the structural shape of the bimetal 30 is as shown in FIG. 3(b).
  • the central throttling vent 31 of the metal piece 30 enters the chamber 22 through the air inlet hole 29 of the cover 28, passes through the vent 33 of the edge of the bimetal 30, and leads to the air outlet 34, when the cavity of the bimetal is accommodated.
  • the vapor temperature of the chamber 22 reaches the design value, for example, 93 degrees Celsius
  • the shape of the bimetal 30 is reversed, as shown in Fig. 5 (a), pressed against the '0'-shaped sealing ring 27, and the push-type switching device 26 is pressed to be turned on.
  • the signal of the push-type switching device 26 is turned on to the controller 41 of the steam generator 40 to start steam cooking. Preface.
  • the push-type switch device 26 is composed of a circular circuit board 35 printed with a conductor pattern and a covered conductive rubber sleeve 36.
  • the conductive rubber sleeve 36 is filled with dry air to form an air spring, and the conductive rubber sleeve 36 is pressed when pressed.
  • the conductor pattern is turned on, the push-type switching device 26 is a signal switch, and the current and voltage passing through are small, so the conductive rubber is a relatively economical choice, and the conductive rubber sleeve 36 can be internally
  • a spring piece (not shown) is used to ensure that the '0'-shaped sealing ring 27 is biased away from the pressing position when the bimetal 30 is reset, and the airtight structure is for avoiding intrusion of moisture or impurities.
  • the base 21 is made of plastic, and the wire connects the push-type switching device 26 to the connector 39, and the connector 39 communicates with the controller 41 via a wire.
  • the cover 28, the bimetal 30, and the vent adjustment device 32 can be detached for cleaning to facilitate the frequent cleaning of the cooking utensils.
  • FIG. 3(b) is an explanatory view of the bimetal structure of the automatic throttle and exhaust valve device of the steamer with built-in electric switch device of the present invention, the central limited flow exhaust port 31 of the bimetal 30, and the outer edge of the bimetal 30 It is equipped with a vent 33, the bimetal rated off temperature can be designed at 93 degrees Celsius, the rated recovery temperature can be designed at 65 degrees Celsius, and the rated temperature difference is 28 degrees Celsius.
  • the automatic throttle and exhaust valve device of the steamer with built-in electric switch device can also be designed as a manual reset type.
  • the bimetal device can be replaced, for example, the rated closing temperature is selected in the plateau region.
  • the bi-metal piece is slightly smaller than the boiling point temperature of the local water, and the throttling exhaust port 31 can be further reduced to increase the pressure difference between the inside and outside of the steamer to meet the needs of high altitude areas.
  • FIG. 4 is a diagram showing the shape reversal of the bimetal of the steamer automatic throttle and exhaust valve device of the built-in electric switch device of the present invention when the vapor temperature reaches the rated value, when the vapor temperature reaches the rated value, for example, 93 degrees Celsius, the bimetal
  • the sheet 30 is reversed in shape, pressed against the '0'-shaped seal ring 27, and the exhaust port 34 is closed, and the vapor can be discharged only from the throttle outlet 31 at the center of the bimetal 30.
  • the pressure-resistant '0'-shaped sealing ring 27 pushes the conductive rubber sleeve 36 of the push-type switching device 26, and the pressed conductive rubber sleeve 36 is pressed against the circular circuit board 35 printed with the conductor pattern to make the conductor pattern
  • the road is turned on, and the on signal is transmitted to the controller 41 of the steam generator 40 via the connector 39 (see Fig. 6) to start the steam cooking process.
  • the diameter of the exhaust port 34 and the throttling exhaust port 31 are determined according to actual needs.
  • the diameter of the throttling exhaust port is smaller than the hole diameter of the exhaust port, and the minimum can be zero, and the exhaust port is completely closed.
  • FIG 5 (a) is an explanatory view showing another embodiment of the steamer automatic throttle exhaust valve device of the built-in electric switch device of the present invention, which is a steamer automatic throttle exhaust valve device of the built-in electric switch device of the present invention Sectional view;
  • Figure 5 (b) is a cross-sectional view taken along line D-D of Figure 5a showing the shape of the bimetal 130.
  • the temperature-controlled automatic throttle steam valve device 900 with the electric switch device comprises a base 21, a cover 28, a temperature-controlled bimetal 130, and the temperature-controlled bimetal 130 is enclosed by the base 21 and the cover 28.
  • the bottom portion of the chamber 22 has a discharge port 34, the cover 28 has an air inlet hole 29, and the temperature control bimetal 130 has a vent 33 at the periphery thereof, but the center of the bimetal 130
  • the orifice of the flow vent is shrunk to zero; the base 21 is internally provided with a push-type electric switch device 26 and a '0'-shaped seal ring 27; the vapor enters the chamber 22 for accommodating the bimetal via the intake hole 29 of the cover 28, and is worn.
  • the vent 33 passing through the periphery of the bimetal 130 leads to the exhaust port 34.
  • the bimetal 130 is normally shaped away from the '0' seal 27, and when the vapor temperature reaches the rated value, the shape of the bimetal 130 is reversed. Pressed on the '0'-shaped seal ring 27, the normal exhaust port is closed, the vapor flow is completely closed, and the '0'-shaped seal ring 27 simultaneously presses the push-type switch device 26 to conduct.
  • Figure 5 (b) is a bimetal structure diagram of the steamer automatic throttle exhaust wide gate device of the built-in electric switch device of the present invention, the temperature control bimetal 130 has a vent 33 at the periphery, and the vent 33 can be as shown in Fig. 5.
  • (b) shows an arc-shaped notch, which may also be a small round hole.
  • the steaming device automatic throttle exhaust valve device of the invention can be installed in any pot using water, and the air is first discharged at the beginning of cooking, and the pot is mainly controlled by the gas-liquid two-phase relationship between water and steam, the temperature At 110 degrees Celsius, the pressure in the pressure cooker is about 1.4 atmosphere pressure. The food is ripened by temperature, and the unnecessary pressure is only a danger.
  • FIG. 6 is an explanatory diagram of an embodiment of a steamer automatic throttle exhaust valve device applied to an energy-saving water-saving steamer according to the present invention.
  • the energy-saving water-saving steamer is a steamer energy-saving and water-saving technical solution proposed by the inventor, as shown in FIG.
  • the energy-saving water-saving steamer comprises a steamer body 1, a steam recovery device 2, a steam injection base 3; the steamer body 1 and the steam recovery device 2 may be integrated into one device, and the steam injection base 3 is provided with a steam nozzle 4 And the venturi effect ejector device 5, the steam 6 is injected into the steamer body 1 via the steam nozzle of the steam injection base 3, and the convection force causes the steam 6 to rise from the bottom of the steamer body 1 to heat the food 7; the top of the steamer body 1 is convective
  • the recovered steam 16 enters the steam recovery unit 2, and the steam recovery unit 2 cools and sinks the recovered steam 16 to the steam injection base 3, passes through the recovery steam plus greenhouse 17, and enters the venturi effect through the recovery steam passage 8.
  • Device 5 The steam is accelerated by the venturi effect generated by the venturi, so that the recovered steam 16 is introduced into the bottom of the steamer body 1 and re-introduced into the convection cycle.
  • the initial stage is because the food temperature is still low, and the steam demand is large.
  • the steam recovery device 2 cools and sinks the recovered steam 16 .
  • the steam generator should be adjusted to reduce the steam supply.
  • the amount of steam injected into the steamer body 1 by the steam nozzle 4 is maintained at a power that can direct the recovered steam 16 into the bottom of the steamer body 1.
  • the exhaust port 9 should also be adjusted to reduce the amount of steam discharged. In order to maintain the steam pressure in the steamer, and achieve energy and water saving purposes.
  • the automatic throttling and exhaust valve device of the steamer enables the energy-saving water-saving steamer device to automatically control the steam discharge amount.
  • the existing automation devices are too complicated and inconvenient to use.
  • An automatic throttled exhaust valve device for a steamer that is convenient and easy to use and simultaneously controls the steam supply is advantageous.
  • the steam generator 40 is a submerged electric heater including: a controller 41, a resistance heat pipe 43, and a controller 41 is also connected to the temperature sensor 42 in the steam injection base 3.
  • the push-type switch device 26 (not shown) in the auto-throttle exhaust valve device 9 of the steamer is electrically connected to the controller 41 via the wire 38, and the built-in electric switch device 26 of the present invention can completely eliminate the manual. The action is adjusted to achieve the purpose of automatically controlling the on-off of the resistance heat pipe 43.

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  • Food Science & Technology (AREA)
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Description

蒸具自动节流排气阓门装置 技术领域
本发明涉及温控阀门技术领域， 特别是一种具有两种排气流量的蒸具排气阀门装 置， 适用于蒸具启动时， 以较大流量排除蒸具内空气， 在蒸具内部已经充满蒸汽时， 关闭排气口使蒸具内部蒸汽环境与大气环境隔绝， 或自动缩小排气口径， 减少蒸汽排 出量， 以有利于节约蒸汽和蒸具内部气液二相蒸汽环境的控制和节能。 背景技术
生活中蒸汽的使用非常广泛， 日常最熟悉的有蒸汽烹饪和蒸汽消毒， 蒸汽的利用 虽然普遍， 但是蒸汽实际上并不容易掌握， 蒸汽在一般生活中的运用， 都是比较粗放 的方式， 以竹蒸笼为例， 虽然很受欢迎， 很方便， 但是使用时， 蒸汽弥漫， 不但严重 影响工作环境， 同时也是能源的浪费。
蒸汽是很有效率的热能传递媒介， 其原因是将液态水加热汽化， 需要吸收大量的 热能 （汽化热）， 蒸汽因含有巨大的汽化热热能 （潜热）， 当蒸汽与竹蒸笼内食物接触 时， 蒸汽释放出潜热， 对食物加热。 蒸汽烹饪的蒸汽温度一般是 100摄氏度， 烤箱却 需要维持 150至 250摄氏度。 因为竹蒸笼逸出的蒸汽， 实际上含有巨大的潜热， 所以 竹蒸笼逸出的蒸汽除了耗水， 实际上也是能源的巨大浪费。 发明内容
本发明的主要目的， 在于公开一种蒸具自动节流排气阀门装置， 在蒸笼内部已经 充满蒸汽时， 自动关闭排气阀门， 消除不必要的蒸汽逸出。
本发明的另一目的， 在于公开一种蒸具自动节流排气阀门装置， 在蒸笼内部已经 充满蒸汽， 自动节制蒸汽排出量， 减少能源和水的浪费， 达成节能、 节水的目的。
本发明的再一目的， 在于公幵一种蒸具自动节流排气阀门装置， 内建电开关装置， 在蒸笼内部已经充满蒸汽， 自动关闭或自动节制蒸汽排出量时， 致动内建的电开关装 置， 以便对其它电气设施， 例如蒸汽产生器控制器， 进行自动控制。
为达到上述目的， 本发明的技术方案是：
一种蒸具自动节流排气阀门装置， 其包括一排气口、 一节流排气口、 一温控致动 器； 其温控致动器包括一基座， 一封盖， 一温控双金属片， 温控双金属片在基座与封. 盖围成的容置双金属片的腔室内； 封盖上有进气孔， 基座有排气口， 排气口内侧设置
'0' 形密封圈， 双金属片周缘有通气口；
蒸气经由封盖上进气孔， 进入容置双金属片的腔室， 通过双金属片周缘的通气口， 穿过 '0' 形密封圈通往排气口， 当排气口蒸气温度到达额定值时， 双金属片的形状反 转， 压在 '0' 形密封圈上， 关闭排气口， 使蒸具内部蒸汽环境与大气环境隔绝。
所述的蒸具自动节流排气阀门装置， 其所述双金属片中心设有节流排气口， 节流 排气口的孔径小于排气口孔径， 当排气口蒸气温度到达额定值时， 双金属片的形状反 转， 压在 '0' 形密封圈上， 关闭排气口， 蒸气由双金属片中心的节流排气口排出， 执 行节流排气。
所述的蒸具自动节流排气阀门装置， 其还包括一电开关装置， 在基座内部， 于基 座与 '0' 形密封圈之间设置一按压式电开关装置， 电开关装置经连接器与蒸汽产生器 的控制器电连接；
按压式电开关装置常态为断路， 由印制有导体纹路的圆形电路板和包覆的导电橡 胶套构成， 导电橡胶套为气密结构， 内部充入干燥空气， 构成一个空气弹簧， 导电橡 胶套受压时压在圆形电路板印制的导体纹路上， 使导体纹路导通， 导通信号经连接器 传送给蒸汽产生器的控制器， 开始蒸汽烹饪程序。
所述的蒸具自动节流排气阀门装置， 其所述电幵关装置， 当排气口蒸气温度到达 额定值时， 双金属片的形状反转， 压在 ' 0' 形密封圈上， 关闭排气口或以节流排气口 执行节流排气， 同时压迫按压式电开关装置导通， 再使控制器开始蒸汽控制程序。
所述的蒸具自动节流排气阀门装置， 其所述导电橡胶套， 内部设有复位弹簧片。 所述的蒸具自动节流排气阀门装置， 其所述双金属片周缘的通气口， 是均匀分布， 其形状是弧形缺口， 或是双金属片的周缘内设置圆形孔。 从上述技术方案可以看出本发明具有以下有益效果：
1. 蒸具自动节流排气阀门装置， 体积小， 结构简单， 容易使用。
2. 蒸具自动节流排气阀门装置，可以装设于任何使用水的蒸具，尤其是压力锅， 在烹饪幵始时先将空气排出， 将显着降低压力锅内承受的压力。
3. 封盖， 双金属片， 出气口调整装置， 都可以拆卸进行清洗， 以方便应用于烹 饪锅具中， 经常清洗的需要。 4. 双金属片装置可以替换， 以适应不同海拔高度地区的需要。
5. 内建电开关装置的蒸具自动节流排气阀门装置， 一体化结构， 体积小， 容易 使用。
6. 内建电开关装置的蒸具自动节流排气阔门装置， 使蒸具控制自动化更容易落 实， 更有效提高蒸具效率。 附图说明
图 1 (a)是本发明蒸具自动节流排气阀门装置实施例说明图；
图 1 (b)是图 1 (a)的 A-A剖视图；
图 2 (a)是本发明蒸具自动节流排气阔门装置另一实施例的说明图；
图 2 (b)是图 2 (a)的 B-B剖视图；
图 3 (a)是本发明内建电开关装置的蒸具自动节流排气阀门装置实施例说明图； 图 3 (b)是图 3 (a)的 C-C剖视图；
图 4是本发明内建电开关装置的蒸具自动节流排气阀门装置双金属片因蒸气温度 到达设计值时形状反转说明图；
图 5 (a)是本发明内建电开关装置的蒸具自动节流排气阀门装置另一实施例说明 图；
图 5 (b)是图 5 (a)的 D-D剖视图；
图 6是本发明内建电开关装置的蒸具自动节流排气阀门装置应用于节能节水蒸笼 实施例的说明图。 具体实施方式
为了达成节能、 节水的目的， 蒸具逸出的蒸汽必须消除或加以节制。 蒸具实际使 用时， 在初始阶段， 蒸汽将逐渐充满蒸具内部， 蒸具内的空气被蒸汽挤出， 因为蒸汽 较热较轻， 蒸汽将由蒸具上部逐渐占据蒸具下部， 根据气液二相变化原理， 饱和蒸汽 温度与压力实际上是一体的两面，水的沸点就是饱和蒸汽压力等于大气压力时的温度， 一般大气压力下， 当蒸具内的空气被蒸汽完全挤出时， 蒸具内的温度才能达到沸点温 度。 蒸具内的空气被蒸汽完全挤出后， 实际上只需补充蒸具内蒸汽散失的热能即可维 持蒸汽压力和温度， 不需像初始阶段一样， 持续大量注入蒸汽， 因此蒸具内的空气被 蒸汽完全挤出时， 能自动关闭排气口或自动缩小排气口径， 减少蒸汽排出量的装置， 将对蒸具节能节水和实用性有很大的助益。
本发明公幵一种蒸具自动节流排气阀门装置，当蒸具内的空气被蒸汽完全挤出时， 能自动关闭排气口或自动缩 、排气口径， 减少蒸汽排出量。
当蒸具内的空气被蒸汽完全挤出，蒸具完成自动关闭排气口或自动缩小排气口径， 减少蒸汽排出量工作以后， 蒸具的蒸汽供应量也应受到调节控制， 蒸汽供应量调节控 制的工作可以手动进行也可以自动进行。 为了对一些电气化蒸具达成自动化控制的目 的， 本发明同时公开一种内建电开关的蒸具自动节流排气阀门装置。
图 1是本发明蒸具自动节流排气阀门装置实施例说明图， 其中， 图 la是本发明的 蒸具自动节流排气阀门装置剖面图； 图 1 (b)是图 1 (a)中的 A- A剖面图,展示双金属片 的形状。蒸具自动节流排气阀门装置 10是一种受温度控制而致动的蒸气阀门装置， 主 要包括一排气口 34、 一节流排气口 31、 一温控致动器 Z; 其温控致动器 Z包括一基座 21 , 一封盖 28， 一温控双金属片 30， 温控双金属片在基座与封盖围成的容置双金属片 的腔室 22内； 封盖 28上有进气孔 29， 基座 21有排气口 34, 排气口 34内侧设置 ' 0' 形密封圈 27， 双金属片 30周缘有通气口 33; 基座 21用螺帽 23和橡胶垫圈 24固定在 蒸具壁 25上， 基座 21排气口 34内侧， 设置 '0' 形密封圈 27; 蒸气经由封盖 28上 进气孔 29进入容置双金属片的腔室 22， 穿过双金属片 30周缘的通气口 33通往排气 口 34， 基座 21排气口 34有能调整排气量的排气口调整装置 32， 温控双金属片 30常 态形状为远离 '0' 形密封圈 27, 当蒸气温度到达额定值时， 温控双金属片 30的形状 反转， 压在 '0' 形密封圈 27上， 关闭排气口 34。 蒸汽开始从双金属片中心的节流排 气口 31排出。
图 1 (b)是双金属片结构图， 双金属片 30的中心有节流排气口 31 , 双金属片 30的 外缘有通气口 33， 通气口 33的形状可以是图 1 (b)所示的弧形缺口， 也可以是圆形小 孔，双金属片 30额定致动温度可设计在 93摄氏度，额定复原温度可设计在 65摄氏度， 额定温差 28摄氏度， 复原也可设计成手动复位的型式。为了适应不同海拔高度地区水 沸点变化的需要， 双金属片装置可以替换， 例如在高原地区选用额定关闭温度略小于 当地水沸点温度的双金属片， 节流排气口 31也再缩小， 以增加蒸笼内外压力差， 适应 高海拔高度地区的需要。
图 2是本发明蒸具自动节流排气阀门装置另一实施例的说明图， 其中， 图 2 (a)是 本发明的蒸具自动节流排气阀门装置剖面图； 图 2 (b)是图 2 (a)中的 B- B剖面图，展示 双金属片的形状。 蒸具自动节流排气阀门装置 100, 主要包括一基座 21， 一容置双金 属片的腔室 22，一温控双金属片 130;基座 21与封盖 28围成容置双金属片的腔室 22， 基座 21用螺帽 23和橡胶垫圈 24固定在蒸具壁 25上，温控双金属片 130在基座 21与 封盖 28围成的容置双金属片的腔室 22内； 基座 21有一排气口 34， 封盖 28上有进气 孔 29， 温控双金属片 130周缘有通气口 33; 基座 21排气口 34内侧， 设置 '0' 形密 封圈 27; 蒸气经由封盖 28上进气孔 29进入容置双金属片的腔室 22， 穿过双金属片 130周缘的通气口 33通往排气口 34，基座 21排气口 34有能调整排气量的排气口调整 装置 32， 双金属片 130常态形状为远离 '0' 形密封圈 27， 当蒸气温度到达额定值时， 双金属片 130的形状反转， 压在 '0' 形密封圈 27上， 关闭排气口 34。
图 2 (b)是双金属片 130结构说明图， 双金属片 130的外缘设置有通气口 33 , 双金 属片 130额定关闭温度可设计在 93摄氏度， 额定复原温度可设计在 65摄氏度， 额定 温差 28摄氏度， 复原也可设计成手动复位的型式。为了适应不同海拔高度地区水沸点 变化的需要， 双金属片装置可以替换， 例如在高原地区选用额定关闭温度略小于当地 水沸点温度的双金属片， 以适应高海拔地区的需要。
温度控制阀门是相关技术人员熟知的工艺，例如美国专利 US2271850、 US3930613. US4646965 所述的双金属片温度控制阀门。 本发明的一种蒸具自动节流排气阀门装置 是一种温度控制阀门， 其封盖上有进气孔， 温控双金属片中心有节流排气口， 周缘有 通气口； 温控双金属片 30兼具温控致动、 排气通道、 节流排气口三种功能， 结构简单 反应直接， 容易拆卸清洁， 很适合日常蒸具的应用。 随海拔高度变化， 双金属片致动- 温度应设定在略低于所在地的水沸点温度， 必要时温控双金属片， 随海拔高度变化的 需要， 很容易替换。
排气口， 节流排气口的孔径， 都是应实际需要而决定， 节流排气口的孔径小于排 气口孔径， 最小可以为零， 节流排气口的孔径为零时， 适用于蒸汽充满蒸具后， 排气 口需要被完全关闭的情形。
本发明的蒸具自动节流排气阔门装置内部还设有电开关装置， 以便对一些电气化 蒸具达成自动控制的目的。
图 3是本发明内建电幵关装置的蒸具自动节流排气阀门装置一实施例说明图， 其 中， 图 3 (a)是本发明的蒸具自动节流排气阀门装置剖面图； 图 3 (b)是图 3 (a)中的 C-C 剖面图，展示双金属片的形状。 本发明内建电开关装置的蒸具自动节流排气阀门装置 90是一种受温度控制而致动的蒸气阀门装置， 主要包括一基座 21， 一容置双金属片的 空腔 22 , 基座 21用螺帽 23和橡胶垫圈 24固定在锅壁 25上， 基座 21内部设置按压 式开关装置 26和 '0' 形密封圈 27， 按压式开关装置 26是一气密式开关装置， 容置 按压式开关装置 26的容室外侧， 留有供按压式开关装置 26受压时伸展的空间 37， 封 盖 28与基座 21围成容置双金属片的腔室 22， 封盖 28上有进气孔 29， 容置双金属片 的空腔 22内部有双金属片 30， 基座 21出气口 34有能调整出气口大小的出气口调整 装置 32, 双金属片 30常态形状为远离 '0' 形密封圈 27， 双金属片 30的结构形状如 图 3 (b)所示， 双金属片 30的中心节流排气口 31， 蒸气经由封盖 28上进气孔 29进入 腔室 22， 穿过双金属片 30边缘的通气口 33通往出气口 34， 当容置双金属片的腔室 22蒸气温度到达设计值时例如 93摄氏度， 双金属片 30的形状反转， 如图 5 (a)所示， 压在 '0' 形密封圈 27上， 并压迫按压式开关装置 26导通， 按压式开关装置 26导通 的信号传送给蒸汽产生器 40的控制器 41， 开始蒸汽烹饪程序。 按压式开关装置 26由 印制有导体纹路的圆形电路板 35和包覆的导电橡胶套 36构成，导电橡胶套 36内部充 入干燥空气， 构成一个空气弹簧， 导电橡胶套 36受压时压在圆形电路板 35印制的导 体纹路上， 使导体纹路导通， 按压式开关装置 26是信号开关， 通过的电流电压都小， 因此导电橡胶是比较经济的选择， 导电橡胶套 36内部可辅以弹簧片（图中未示）， 以确 保双金属片 30重置时 '0' 形密封圈 27弹离按压位置， 气密结构则是为了避免水气或 杂质侵入。 基座 21由塑料制成， 导线将按压式开关装置 26接通至连接器 39， 连接器 39经导线与控制器 41连通。 封盖 28, 双金属片 30， 排气口调整装置 32都可以拆卸 进行清洗， 以方便烹饪锅具经常清洗的需要。
图 3 (b)是本发明内建电开关装置的蒸具自动节流排气阀门装置双金属片结构说明 图， 双金属片 30的中心有限流排气口 31 , 双金属片 30的外缘设置有通气口 33， 双金 属片额定关闭温度可设计在 93摄氏度， 额定复原温度可设计在 65摄氏度， 额定温差 28摄氏度。内建电开关装置的蒸具自动节流排气阀门装置也可设计成手动复位的型式， 为了适应不同海拔地区水沸点变化的需要， 双金属片装置可以替换， 例如在高原地区 选用额定关闭温度略小于当地水沸点温度的双金属片， 节流排气口 31也可再缩小， 以 增加蒸具内外压力差， 适应高海拔地区的需要。
图 4是本发明内建电开关装置的蒸具自动节流排气阀门装置双金属片因蒸气温度 到达额定值时形状反转说明图， 当蒸气温度到达额定值时， 例如 93摄氏度， 双金属片 30形状反转， 压在 '0' 形密封圈 27上， 关闭排气口 34， 蒸气只能由双金属片 30中 心的节流排气口 31排出。 受压力的 '0' 形密封圈 27推挤按压式开关装置 26的导电 橡胶套 36 , 受压的导电橡胶套 36压在印制有导体纹路的圆形电路板 35上， 使导体纹 路导通， 导通信号经连接器 39传送给蒸汽产生器 40的控制器 41 (参见图 6)， 幵始蒸 汽烹饪程序。
排气口 34， 节流排气口 31 的孔径， 都是应实际需要而决定， 节流排气口的孔径 小于排气口孔径， 最小可以为零， 完全关闭排气口。
图 5 (a)是本发明内建电开关装置的蒸具自动节流排气阀门装置另一实施例说明 图， 其是本发明内建电开关装置的蒸具自动节流排气阔门装置剖面图； 图 5 (b)是图 5a 中的 D- D剖面图，展示双金属片 130的形状。具电开关装置的温控自动节流蒸气阀门装 置 900, 包括一基座 21， 一封盖 28， 一温控双金属片 130， 温控双金属片 130在基座 21与封盖 28围成容置双金属片的腔室 22内； 基座 21有一排气口 34， 封盖 28上有进 气孔 29， 温控双金属片 130周缘有通气口 33, 但是双金属片 130中心的节流排气口口 径被收缩为零； 基座 21 内部设置按压式电开关装置 26和 '0' 形密封圈 27; 蒸气经 由封盖 28上进气孔 29进入容置双金属片的腔室 22， 穿过双金属片 130周缘的通气口 33通往排气口 34， 双金属片 130常态形状为远离 '0' 形密封圈 27， 当蒸气温度到达 额定值时， 双金属片 130的形状反转， 压在 '0' 形密封圈 27上， 关闭常态排气口， 蒸气流通被完全关闭， '0' 形密封圈 27同时压迫按压式开关装置 26导通。
图 5 (b)是本发明内建电开关装置的蒸具自动节流排气阔门装置双金属片结构说明 图， 温控双金属片 130周缘有通气口 33， 通气口 33可以如图 5 (b)所示呈弧形缺口， 也可以是小圆孔。
本发明的蒸具自动节流排气阀门装置， 可以装设于任何使用水的锅具， 在烹饪开 始时先将空气排出， 锅内主要是受到水与蒸气的气液二相关系控制， 温度为 110摄氏 度时， 压力锅内蒸气压力约为 1. 4大气压力， 食物熟化是靠温度， 不必要的压力只是 徒增危险。
图 6 是本发明的蒸具自动节流排气阀门装置应用于节能节水蒸笼实施例的说明 图， 节能节水蒸笼是由本发明人提出的一种蒸笼节能节水技术方案， 如图 6所示， 节 能节水蒸笼包括一蒸笼本体 1、 一蒸汽回收装置 2、 一蒸汽喷射底座 3; 蒸笼本体 1与 蒸汽回收装置 2可以是结合为一体的装置， 蒸汽喷射底座 3装设有蒸汽喷嘴 4和文氏 管效应引射装置 5， 蒸汽 6经由蒸汽喷射底座 3的蒸汽喷嘴射入蒸笼本体 1 , 对流作用 力使蒸汽 6由蒸笼本体 1底部浮升， 对食物 7加热； 蒸笼本体 1顶端对流逸出的回收 蒸汽 16, 进入蒸汽回收装置 2, 蒸汽回收装置 2将回收蒸汽 16冷却下沉， 导向蒸汽喷 射底座 3， 穿过回收蒸汽加温室 17， 经由回收蒸汽通路 8进入文氏管效应引射装置 5， 利用蒸汽加速通过文氏管时产生的文氏管效应，使回收蒸汽 16被引射入蒸笼本体 1底 部， 重新汇入对流循环。
节能节水蒸笼实际使用时， 初始阶段因为食物温度仍低， 蒸汽需要量较大， 随着 蒸汽涌入， 蒸汽将逐渐充满蒸笼本体内部， 并由蒸笼本体 1顶端逸出， 进入蒸汽回收 装置 2， 蒸汽回收装置 2将回收蒸汽 16冷却下沉， 蒸汽由排气口 9排出时， 表示蒸笼 本体 1内部与蒸汽回收装置 2己经充满蒸汽，此时应调节蒸汽产生器减少蒸汽供应量， 将蒸汽喷嘴 4射入蒸笼本体 1的蒸汽量， 维持在能将回收蒸汽 16引射进入蒸笼本体 1 底部的动力即可， 减少蒸汽供应量时， 也应调整排气口 9， 减少蒸汽排出量， 以维持 蒸笼内蒸汽压力， 并达到节能节水的目的。
蒸具自动节流排气阀门装置， 使节能节水蒸笼装置能自动节制蒸汽排出量， 但是 调节减少蒸汽供应量， 仍须以手动完成， 显然不太方便。 对于一些使用电力的蒸汽产 生器， 现有的自动化装置又太繁复， 使用起来也不方便。 一种方便易用又能同时控制 蒸汽供应器的蒸具自动节流排气阀门装置是很有利的。
图 6所示， 蒸汽产生器 40是浸水式电热器， 包括： 控制器 41， 电阻热管 43， 控 制器 41也与蒸汽喷射底座 3内的温度传感器 42接通。 蒸具自动节流排气阔门装置 9 内的按压式开关装置 26 (图中没示出）， 经导线 38与控制器 41 电连接， 利用本发明 内建电开关装置 26， 可以完全免除手动调整动作， 达到自动控制电阻热管 43通断的 目的。

Claims

权 利 要 求
1、 一种蒸具自动节流排气阀门装置， 其特征在于， 包括一排气口 （34)、 一节流 排气口 （31)、 一温控致动器 （Z);
其温控致动器 （Z) 包括一基座 （21)， 一封盖 （28)， 一温控双金属片 （30)， 温 控双金属片 （30) 在基座 （21) 与封盖 （28) 围成的容置双金属片的腔室 （22) 内； 封盖 (28)上有进气孔 (29), 基座 (21)有排气口 (34), 排气口 (34) 内侧设置 '0' 形密封圈 （27)， 双金属片 （30) 周缘有通气口 （33);
蒸气经由封盖 （28) 上进气孔 （29)， 进入容置双金属片的腔室 （22), 通过双金 属片周缘的通气口 （33)， 穿过 '0' 形密封圈 （27)通往排气口 （34)， 当排气口 （34) 蒸气温度到达额定值时， 双金属片 （30) 的形状反转， 压在 '0' 形密封圈 （27) 上， 关闭排气口 （34)， 使蒸具内部蒸汽环境与大气环境隔绝。
2、 根据权利要求 1所述的蒸具自动节流排气阀门装置， 其特征在于， 所述双金属 片 (30) 中心设有节流排气口 (31), 节流排气口 (31)的孔径小于排气口 (34)孔径， 当排气口 （34) 蒸气温度到达额定值时， 双金属片 （30) 的形状反转， 压在 '0' 形密 封圈 （27) 上， 关闭排气口 （34)， 蒸气由双金属片中心的节流排气口 （31) 排出， 执 行节流排气。
3、 根据权利要求 1或 2所述的蒸具自动节流排气阔门装置， 其特征在于， 还包括 一电开关装置 （26)， 在基座 （21) 内部， 于基座 （21) 与 '0' 形密封圈 （27) 之间 设置一按压式电开关装置（26)， 电开关装置（26)经连接器（39)与蒸汽产生器（40) 的控制器 (41) 电连接；
按压式电开关装置 （26) 常态为断路， 由印制有导体纹路的圆形电路板 （35) 和 包覆的导电橡胶套 （36) 构成， 导电橡胶套 （36) 为气密结构， 内部充入干燥空气， 构成一个空气弹簧， 导电橡胶套 （36) 受压时压在圆形电路板 （35) 印制的导体纹路 上，使导体纹路导通，导通信号经连接器（39)传送给蒸汽产生器（40)的控制器（41)， 幵始蒸汽控制程序。
4、 根据权利要求 3所述的蒸具自动节流排气阀门装置， 其特征在于， 所述电开关 装置 （26)， 当排气口 （34) 蒸气温度到达额定值时， 双金属片 （30) 的形状反转， 压 在 '0' 形密封圈 （27) 上， 关闭排气口 （34) 或以节流排气口 （31) 执行节流排气， 同时压迫按压式电开关装置 （26) 导通， 导通信号经连接器 （39) 传送给蒸汽产生器 (40) 的控制器 (41 ) 开始蒸汽控制程序。
5、 根据权利要求 3所述的蒸具自动节流排气阀门装置， 其特征在于， 所述导电橡 胶套 （36 )， 内部设有复位弹簧片。
6、 根据权利要求 1所述的蒸具自动节流排气阀门装置， 其特征在于， 所述双金属 片 （30) 周缘的通气口 （33 )， 是均勾分布， 其形状是弧形缺口。
7、 根据权利要求 1所述的蒸具自动节流排气阀门装置， 其特征在于， 所述双金属 片 （30) 周缘的通气口 （33)， 是均匀分布， 其形状是双金属片 （30) 的周缘内设置圆 形孔。
PCT/CN2007/003631 2007-07-30 2007-12-17 Soupape d'échappement automatique à papillon pour autocuiseur WO2009015529A1 (fr)

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