WO2013149492A1 - 回水可调节的咖啡机用阀结构 - Google Patents

回水可调节的咖啡机用阀结构 Download PDF

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Publication number
WO2013149492A1
WO2013149492A1 PCT/CN2013/000016 CN2013000016W WO2013149492A1 WO 2013149492 A1 WO2013149492 A1 WO 2013149492A1 CN 2013000016 W CN2013000016 W CN 2013000016W WO 2013149492 A1 WO2013149492 A1 WO 2013149492A1
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Prior art keywords
chamber
water
return
cavity
hole
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PCT/CN2013/000016
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English (en)
French (fr)
Inventor
柴华娣
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宁波全景电器技术有限公司
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Publication of WO2013149492A1 publication Critical patent/WO2013149492A1/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
    • A47J31/00—Apparatus for making beverages
    • A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
    • A47J31/34—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure
    • A47J31/36—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means
    • A47J31/3666—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means whereby the loading of the brewing chamber with the brewing material is performed by the user
    • A47J31/3671—Loose coffee being employed
    • 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
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/46—Dispensing spouts, pumps, drain valves or like liquid transporting devices
    • A47J31/461—Valves, e.g. drain valves
    • 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
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/48—Clips, rings, hooks, or like devices to support filter parts while not in use

Definitions

  • the present invention relates to an automatic valve for a water supply device for a coffee machine, and more particularly to a valve structure for a coffee machine with adjustable backwater. Background technique
  • the structure and working process of the pressurized hot water supply system of the pump coffee machine are usually: including water tank, micro water pump, check valve and boiler, etc.
  • the inlet of the micro water pump is connected with the water tank, and the outlet connection of the micro water pump is single.
  • the outlet of the check valve is connected to the boiler, and a return passage is arranged between the boiler and the water tank, and a check valve structure is arranged on the return passage.
  • the existing pump pressurized water supply system has some shortcomings: 1.
  • the pump type coffee machine uses a low pressure of only 2.5 bar, a high of 19 to 20 bar, and the existing pressurization.
  • the check valve structure of the return channel in the water supply system can maintain a relatively constant pressure. Therefore, different pressure passages need to be equipped with different return passages for different specifications, and the adaptability is not wide. 2.
  • the boiler needs to have a separate return port and Corresponding return pipeline, the structure is more complicated; 3, the pump may be empty for a period of time, the water tank is short of water, etc., resulting in the problem of pumping water, the air in the pump body is difficult to discharge, especially when the boiler is under pressure, It is even more likely that the pump will be damaged by not being able to pump water for a long time.
  • the Chinese invention patent "Automatic valve for water supply device for coffee machine” discloses such an automatic valve for a water supply device for a coffee machine, which has a water supply device for simplifying the coffee machine.
  • the structure and pressure can be adjusted in a wide range, and can be adapted to various pressure pumps of different specifications and can effectively prevent the pump from being pumped. Particularly suitable for use in pump coffee machines.
  • the head of the inlet chamber in the aforementioned patent communicates with the return chamber through a vent hole formed in the side wall of the return chamber, and the exhaust valve has a wide core installed therein; the head of the exhaust valve spool is concave
  • the groove is located on the vent hole, and the rear top portion has an exhaust valve compression spring, and the rear end of the exhaust valve compression spring is limited by a valve plug fixed at the water inlet of the water inlet chamber.
  • the compression spring and the exhaust valve spool in the foregoing valve structure are located in the inlet chamber, and the inlet chamber needs to be connected to the inlet pipe during installation.
  • the compression spring can not be adjusted after installation, that is, the return water can not be adjusted; and according to the product requirements, the pressure of the exhaust valve compression spring to the exhaust valve spool is best to enable the exhaust valve spool to just discharge Air, but hot water does not pass through the vent hole.
  • the pressure setting of the compression spring is very high.
  • the technical problem to be solved by the present invention is to provide a water return adjustable coffee machine valve structure for the above-mentioned state of the art, which can facilitate the pre-tightening pressure of the compression spring to the exhaust core after installation. Adjust to achieve an optimal sealing effect on the exhaust core.
  • a valve structure for a coffee machine with adjustable backwater comprising a valve body having a water inlet chamber, a water outlet chamber, a pressure regulating chamber and a return chamber;
  • the head communicates with the inlet chamber through a water outlet opening in the side wall of the inlet chamber, and a one-way spool is installed in the outlet chamber, and the head of the one-way spool is pressed against the water outlet hole, and the rear top holds the bill.
  • the spring is compressed to the valve, so that the one-way core has a tendency to seal the water outlet hole; the head of the pressure regulating chamber communicates with the water outlet chamber through a pressure relief hole formed on the side wall of the water outlet chamber, and the pressure regulating chamber is installed with a drain
  • the trend of the pressure hole, the back end of the pressure relief valve compression spring is provided with a pressure regulating screw, and the pressure regulating screw is sealed and screwed to the tail of the pressure regulating chamber; the return chamber is connected with the pressure regulating chamber; Water regulating chamber, head of the return water regulating chamber The water return hole opened on the side wall of the water inlet chamber communicates with the water inlet chamber, and the head of the water return adjustment chamber communicates with the return chamber
  • the outlet of the water outlet chamber is sealed with a water outlet joint.
  • the outlet pipe joint is provided to facilitate communication between the outlet chamber and the boiler in the coffee machine.
  • the outlet pipe joint is sealingly connected to the tail of the water outlet chamber of the valve body so as to be rotatable relative to the water outlet chamber. It is more convenient to connect the internal pipeline of the coffee machine and utilize the space.
  • the tail portion of the water outlet chamber has a stepped expansion hole, and thus an outer shoulder is formed on the outer side wall of the water outlet chamber, and the head of the outlet pipe joint has a step shape matching the stepped expansion hole,
  • the outlet pipe joint is inserted into the tail of the water outlet chamber and the sealing faces of the two are provided with a sealing ring, and the outer side of the outlet pipe joint is further formed with a buckle, and the buckle is fastened to the outer shoulder of the outer side wall of the water outlet cavity on. It is the specific connection method of the outlet pipe joint.
  • the outer end surface of the valve body has a concave cavity, and an annular groove is arranged on the bottom surface of the concave cavity, and one side of the bottom surface of the annular groove groove is opened.
  • the middle portion of the cavity is provided with a threaded hole, and the end cover is fixed to the cavity by screws, and a gasket having a shape matching the opening of the cavity is further disposed between the end cover and the cavity.
  • the end cap is screwed to the cavity for ease of installation, and the gasket is provided to enhance the seal between the end cap and the cavity.
  • the return chamber has a lateral flow passage and a vertical outlet passage, and the head of the outlet passage communicates with the flow passage through a perforation formed in the side wall of the flow passage, and the opening of the tail portion of the flow passage is provided with a plug seal, and the outlet passage is The tail seal is connected to a return pipe joint, and the first hole communicates with the flow passage.
  • the return pipe joint is arranged to facilitate the connection between the water outlet chamber and the boiler in the coffee machine, and the structure of the return chamber is convenient for forming, and the return pipe joint is conveniently arranged.
  • the return conduit fitting is sealingly coupled to the tail of the outlet passage in a rotatable manner relative to the outlet passage. It is more convenient to connect the internal pipeline of the coffee machine and utilize the space.
  • the tail portion of the outlet passage is a stepped expansion hole, and thus an outer shoulder is formed on the outer side wall of the outlet passage, and the head of the return pipe joint has a step shape matching the stepped expansion hole,
  • the return pipe joint is inserted into the tail end of the outlet passage and the sealing faces of the two are provided with a sealing ring, and the outer side of the return pipe joint is further formed with a buckle, and the buckle is fastened to the outer shoulder of the outer side wall of the outlet passage on.
  • the advantages of the invention are as follows: 1. When the pressure in the boiler is too large, the pressure relief valve core is decompressed, so that there is no need to open a return port on the boiler and set a special return channel. Make the entire water supply structure simpler and more compact. 2.
  • the elastic force of the pressure-reducing wide compression spring can be adjusted by adjusting the pressure-regulating screw, so as to adapt to various pressure water pumps of different specifications, and the pressure can be adjusted in a wide range, which is convenient for safe pressure relief, and can avoid explosion caused by excessive boiler pressure. 3.
  • a return water regulating chamber is provided, and the exhaust valve core, the exhaust valve compression spring and the adjusting screw are disposed in the water return adjusting chamber, and the back water regulating device is not connected with the pipeline and is exposed, so even if After the inlet chamber of the valve is installed on the inlet pipe, the adjusting screw can be externally screwed to adjust the pre-tightening pressure of the exhaust wide compression spring to the exhaust valve core, so that the vent hole is only ventilated and leaks. The effect is less, improving the overall quality of the coffee machine after using the valve. 4.
  • the head of the exhaust valve core is provided with a groove. Because of the existence of the groove, it is convenient to exhaust the water inlet chamber, and the water is not pumped due to the air pumping.
  • FIG. 1 is a schematic perspective view of an embodiment of the present invention
  • Figure 2 is a cross-sectional view showing the structure of the embodiment of the present invention.
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 2;
  • Figure 5 is a cross-sectional view taken along line C-C of Figure 2;
  • FIG. 6 is a schematic perspective view showing the structure of the embodiment of the present invention with the cover and the gasket removed. detailed description
  • a valve structure for a coffee machine with adjustable backwater comprising a valve body 1, having a water inlet chamber 11, a water outlet chamber 12, a pressure regulating chamber 13 and a return chamber 14 in the valve body.
  • the head of the water outlet chamber 12 communicates with the water inlet chamber 11 through a water outlet hole 111 formed in the side wall of the water inlet chamber.
  • the water outlet chamber 12 is provided with a one-way spool 2 made of a silicone material, and the head of the one-way spool 2 The portion abuts on the water outlet hole 111, and the rear top portion holds the check valve compression spring 21, so that the one-way valve body 2 always has a tendency to seal the water outlet hole 111.
  • the outlet of the water outlet chamber 12 is sealed with an outlet pipe joint 6.
  • the outlet pipe joint 6 is sealed and connected to the tail portion of the water outlet chamber 12 of the valve body so as to be rotatable relative to the water outlet chamber 12. That is, a stepped expansion hole is formed in the tail portion of the water outlet chamber 12, and thus an outer shoulder 122 is formed on the outer side wall of the water outlet chamber 12, and the head of the outlet pipe joint 6 has a step shape matching the stepped expansion hole.
  • the water pipe joint 6 is inserted into the tail portion of the water outlet chamber 12 and a sealing ring 61 is disposed on the abutting surface of the water outlet joint.
  • the outer side of the water outlet pipe joint 6 is further formed with a buckle 62. The buckle 62 is fastened to the outer shoulder of the outer side wall of the water outlet chamber 12. 122 on.
  • the head of the pressure regulating chamber 13 communicates with the water outlet chamber 12 through a pressure relief hole 121 formed in the side wall of the water outlet chamber.
  • the pressure regulating chamber 13 is provided with a pressure relief valve core 3 made of a silicone material, and the pressure relief valve core 3 is The head abuts against the pressure relief hole 121, and the rear top holds a pressure relief valve compression spring 31 whose elastic force is greater than the elastic force of the one-way valve compression spring 21, so that the pressure relief core 3 always has a tendency to seal the pressure relief hole 121.
  • the back end of the pressure relief valve compression spring 31 is provided with a pressure regulating screw 4, and the pressure regulating screw 4 is sealed and screwed to the tail of the pressure regulating chamber 13 by a thread and a sealing ring.
  • the return chamber 14 is connected to the pressure regulating chamber 13; due to the structural characteristics of the product and the principle of the mold design, it is not suitable for the core design inside the valve body 1, so it is inconvenient to directly set the passage inside the wide body 1 to return the chamber 14 and The pressure regulating chamber 13 is connected.
  • a cavity 16 on the outer end surface of the valve body 1.
  • the bottom surface of the cavity 16 is provided with an annular groove 161, and one side of the bottom surface of the ring groove 161 is opened.
  • first hole 162 communicating with the pressure regulating chamber 13, and the other side of the bottom surface of the annular groove 161 is opened with a second hole 163 communicating with the return chamber 14, and the opening of the cavity 16 is provided with an end cap 7 for sealing.
  • the central portion of the cavity 16 is provided with a threaded hole 164, and the end cover 7 is fixed to the cavity 16 by a screw 71, and a gasket 72 having a shape matching the opening of the cavity 16 is further provided between the end cover 7 and the cavity 16.
  • the return chamber 14 has a lateral flow passage 14a and a vertical outlet passage 14b.
  • the head of the outlet passage 14b communicates with the flow passage 14a through a through hole 14c formed in the side wall of the flow passage 14a, and the opening of the tail portion of the flow passage 14a is provided.
  • the plug 8 is sealed.
  • the plug 8 and the end cover 7 are integrally formed, and the tail portion of the outlet passage 14b is sealingly connected with a return pipe joint 9, and the first hole 462 is in communication with the flow passage 14a.
  • the return pipe joint 9 is sealingly coupled to the tail of the outlet passage 14b in such a manner as to be rotatable relative to the outlet passage 14b.
  • the tail portion of the outlet passage 14b is a stepped expansion hole, and thus an outer shoulder 14d is formed on the outer side wall of the outlet passage 14b, and the head of the return pipe joint 9 has a step shape matching the stepped expansion hole, the return pipe joint 9 mating in A sealing ring 91 is disposed on the abutting surface of the outlet passage 14b and the abutting faces of the two, and a buckle 92 is formed on the outer side of the return pipe joint 9, and the buckle 92 is fastened to the outer shoulder 14d of the outer side wall of the outlet passage 14b.
  • the valve body 1 also has a return water regulating chamber 15, and the head of the return water regulating chamber 15 communicates with the water inlet chamber 11 through a water return hole 112 formed in the side wall of the water inlet chamber, and the head of the water return adjusting chamber 15 is further
  • the vent hole 141 is formed in the side wall of the flow path 14a of the return chamber to communicate with the return chamber 14.
  • the air inlet chamber 11 is provided with a flexible silicone material exhaust valve core 5, and the head of the exhaust valve core 5 is opened. There is a groove 51 and abuts against the vent hole 141.
  • the rear top has a venting valve compression spring 52.
  • the rear end of the venting valve compression spring 52 is provided with an adjusting screw 53.
  • the adjusting screw 53 is screwed through the thread and the sealing ring. At the end of the backwater conditioning chamber 15.
  • the water inlet chamber 11 is directly connected to the water supply pipe of the micro water pump, and the water outlet chamber 12 is connected to the boiler through the outlet pipe joint 6, and the return water chamber 12 is connected to the water tank through the water return pipe joint 9.
  • the micro pump When the micro pump is started for a while or stopped for a period of time, if there is air in the pump body, because the head of the exhaust valve core 5 is provided with a groove 51, the exhaust valve core 5 is under the action of the exhaust valve compression spring 52.
  • the vent hole 141 cannot be completely sealed, and the air in the pump body can be discharged from the vent hole 141. After the air is discharged, the micro water pump starts to pump water, the pressure in the water inlet chamber 11 increases, and the vent valve core 5 deforms under the pressure.
  • the vent hole 141 is blocked, and the pressure in the water inlet chamber 11 is further increased, that is, the one-way valve core 2 in the water outlet chamber 12 is circulated out of the water chamber 12 and the outlet pipe joint 6 into the boiler, and the pressure in the boiler is set.
  • the water outlet spring in the boiler will be turned on to start brewing the coffee; when the pressure of the water in the boiler exceeds the set value, the pressure relief valve core 3 in the pressure regulating chamber 13 is opened, and the return chamber 14 and the return pipe joint are connected. 9 flow back to the water tank.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

一种回水可调节的咖啡机用阀结构包括阀体（1），阀体内具有进水腔（11）、出水腔（12）、调压腔（13）和回流腔（14）。阀体（1）内还具有回水调节腔（15），回水调节腔（15）的头部与进水腔（11）连通，回水调节腔（15）的头部还通过排气孔（141）与回流腔（14）连通，进水腔（11）内安装有柔性材质的排气阀芯（5），排气阀芯（5）的头部开设有凹槽（51）且抵在排气孔（141）上，后部顶持有排气阀压缩弹簧（52），排气阀压缩弹簧（52）后端设有调节螺丝（53），调节螺丝（53）密封螺接在回水调节腔（15）尾部。回水调节腔（15）不和管路进行连接而外露，因此即使将该阀的进水腔（11）安装到进水管上后，还可在外部对调节螺丝（53）进行拧动，以调节排气阀压缩弹簧（52）对排气阀芯（5）的预紧压力，使排气孔（141）达到仅通气而漏水少的效果。

Description

回水可调节的咖啡机用阀结构
技术领域
本发明涉及一种咖啡机供水装置用自动阀，尤其涉及一种回水可调节的咖啡机用阀 结构。 背景技术
传统冲煮器具因为水通过咖啡粉的时间太久， 因而无法使用细致的咖啡粉， 所以不 易获得最佳的萃取率。 为了加快冲煮咖啡的时间， 以便使用更细的咖啡粉， 获得最佳的 萃取率，意大利人便在冲煮咖啡的过程中，利用活塞 (Piston)或泵浦 (Pump)对热水施加压 力， 将这些带压力的热水， 平均推入装满咖啡的滤器中， 如此便可将冲煮时间降低到三 十秒以内， 甚至十来秒， 以加速萃取的过程， 获取更高萃取率。
泵浦式咖啡机的加压热水供应系统的结构组成和工作过程通常为： 包括有水箱、微 型水泵、 单向阀及锅炉等， 微型水泵的进水口与水箱相通， 微型水泵的出口连接单向阀 的入水口， 单向阀的出水口连通锅炉， 锅炉与水箱之间还设有回流通道， 回流通道上设 置有单向阀结构。 当锅炉内压力不足时， 微型水泵启动， 从水箱抽水顶开单向阀注入锅 炉， 锅炉内水压达到设定压力后， 将打开锅炉中出水弹簧开始冲泡咖啡； 当锅炉内水压 因加热而上升并超过设定值上限时， 则顶开回流通道上的单向阀结构， 流回水箱。在实 际使用中发现， 现有的泵浦加压水供应系统存在一些不足： 1、 泵浦式咖啡机所采用的 压力低的仅 2.5bar， 高的达 19~20bar， 而现有的加压水供应系统中回流通道的单向阀结 构所能保持的压力比较固定， 故针对不同规格的压力水泵需配设不同的回流通道， 适应 性不广； 2、 锅炉上需单独设有回流口及相应的回流管道， 结构比较复杂； 3、 水泵可能 因一段时间不用、 水箱缺水等原因发生空抽， 导致抽不上水、 泵体内的空气难以排出等 问题， 尤其当锅炉中存压时， 更是可能因长时间抽不上水而损坏水泵。
针对前述现状， 如一专利号为 ZL200610154657.9(公告号为 CN100487293C)的中国 发明专利《咖啡机供水装置用自动阀》披露了这样一种咖啡机供水装置用自动阀， 具有 可简化咖啡机供水装置结构、 压力可调范围广、 可适应各种不同规格压力水泵及可有效 防止水泵空抽的优点。 特别适合用于泵浦式咖啡机。
前述专利中的进水腔的头部通过开设在回流腔侧壁上的排气孔与回流腔连通，进水 腔内安装有排气阀阔芯； 排气阀阀芯的头部开设有凹槽且抵在排气孔上， 后部顶持有排 气阀压缩弹簧， 排气阀压缩弹簧的后端则由固定在进水腔进水口处的阀塞限位。 前述阀 结构中的压缩弹簧和排气阀阀芯位于进水腔内， 而进水腔在安装时需要连接到进水管 上， 故安装后压缩弹簧便不可以再进行调节， 即回水不可调节； 而根据产品要求， 排气 阀压缩弹簧对排气阀阀芯的压力最好能使排气阀阀芯刚好能排出空气，但热水不会通过 排气孔， 为达到这种高质量的要求， 对压缩弹簧的压力设置提出很高要求， 一般通过一 次性安装， 基本不可能达到较好的要求， 因此前述自动阀在开始工作阶段排气孔会有较 大的漏水， 导致咖啡机在使用过程中， 回流腔始终有较大的漏水。 发明内容
本发明所要解决的技术问题是针对上述现有技术现状而提供一种回水可调节的咖 啡机用阀结构，该阀结构在安装后，能方便对压缩弹簧对排气阔芯的预紧压力进行调节， 使排气阔芯达到一个最佳的密封效果。
本发明解决上述技术问题所采用的技术方案为： 一种回水可调节的咖啡机用阀结 构， 包括有阀体， 阀体内具有进水腔、 出水腔、 调压腔和回流腔； 出水腔的头部通过开 设在进水腔侧壁上的出水孔与进水腔连通， 出水腔内安装有单向阀芯， 单向阀芯的头部 抵在出水孔上， 后部顶持有单向阀压缩弹簧， 从而使单向闽芯始终具有封住出水孔的趋 势； 调压腔的头部通过开设在出水腔侧壁上的泄压孔与出水腔连通， 调压腔内安装有泄 压阀芯， 泄压阀芯的头部抵在泄压孔上， 后部顶持有弹力大于单向阀压缩弹簧的弹力的 泄压阀压缩弹簧， 从而使泄压阀芯始终具有封住泄压孔的趋势， 泄压阀压缩弹簧的后端 设有调压螺丝， 调压螺丝密封螺接在调压腔尾部； 回流腔与调压腔连通； 其特征在于： 所述阀体内还具有回水调节腔， 回水调节腔的头部通过开设在进水腔侧壁上的回水孔与 进水腔连通， 回水调节腔的头部还通过开设在所述回流腔侧壁上的排气孔与所述回流腔 连通， 进水腔内安装有柔性材质的排气阀芯， 排气阀芯的头部开设有凹槽且抵在排气孔 上， 后部顶持有排气阀压缩弹簧， 排气阔压缩弹簧后端设有调节螺丝， 调节螺丝密封螺 接在回水调节腔尾部。
上述出水腔的尾部密封连接有出水管接头。设置出水管接头方便出水腔与咖啡机内 的锅炉连通。
上述出水管接头以可相对所述出水腔旋转的方式密封连接在所述阀体的出水腔尾 部。 更加方便咖啡机内部管路的连接及空间的利用。
上述出水腔的尾部呈台阶形扩张孔， 并因此而在所述出水腔的外侧壁上形成有外 肩， 所述出水管接头的头部呈与该台阶形扩张孔相适配的台阶形， 所述出水管接头插配 在所述出水腔尾部且二者的对接面上设置有密封圈，所述出水管接头的外侧还成型有卡 扣， 卡扣扣接在所述出水腔外侧壁的外肩上。 其为出水管接头的具体连接方式。
由于产品的结构特点， 及模具设计的原理， 不适合在阔体内部进行抽芯设计， 因此 不方便直接在阀体内部设置通道将回流腔与调压腔连通， 为解决这一技术难题， 我们在 上述阀体的外端面具有凹腔， 并在凹腔的底面上设有环形凹槽， 环槽凹槽底面的一侧开 有与所述调压腔相通的第一孔， 环槽凹槽底面的另一侧开有与所述回流腔相通的第二 孔， 所述凹腔的开口处设有端盖密封。也就是说通过在阔体的外部端面上设置通道将回 流腔与调压腔连通， 并与凹腔开口出设置端盖密封， 解决了产品设计上的制造。
上述凹腔的中部设有螺紋孔， 所述端盖通过螺钉固定在凹腔上， 且在端盖和凹腔之 间还设有外形与凹腔开口相配的密封垫。端盖通过螺钉固定在凹腔上具有安装方便的优 点， 另外设置密封垫能增强端盖和凹腔之间的密封。
上述回流腔具有横向的流道和竖向的出口通道， 出口通道的头部通过开设在流道侧 壁上的穿孔与流道连通， 流道尾部的开口处设有堵头密封， 出口通道的尾部密封连接有 回流管接头， 所述第一孔与所述流道相通。 设置回流管接头方便出水腔与咖啡机内的锅 炉连通， 另外该回流腔结构便于成型， 而且方便设置回流管接头。
上述回流管接头以可相对所述出口通道旋转的方式密封连接在所述出口通道的尾 部。 更加方便咖啡机内部管路的连接及空间的利用。
上述出口通道的尾部呈台阶形扩张孔，并因此而在所述出口通道的外侧壁上形成有 外肩， 所述回流管接头的头部呈与该台阶形扩张孔相适配的台阶形， 所述回流管接头插 配在所述出口通道尾部且二者的对接面上设置有密封圈，所述回流管接头的外侧还成型 有卡扣， 卡扣扣接在所述出口通道外侧壁的外肩上。
与现有技术相比， 本发明的优点在于： 1、 当锅炉内压力过大时， 将顶开泄压阀芯 泄压， 故无需在锅炉上另行开设回流口及设置专门的回流通道， 可使整个供水装置结构 更加简单和紧凑。 2、 可通过调节调压螺丝调节泄压阔压缩弹簧的弹力， 从而适应各种 不同规格压力水泵， 且压力可调范围大， 便于安全泄压， 可避免锅炉压力过高而引起爆 炸。 3、 另外设置回水调节腔， 可将排气阀芯、 排气阀压缩弹簧和调节螺丝设置在该回 水调节腔内， 该回水调节器不和管路进行连接而外露， 因此即使将该阀的进水腔安装到 进水管上后， 还可在外部对调节螺丝进行拧动， 以调节排气阔压缩弹簧对排气阀芯的预 紧压力， 使排气孔达到仅通气而漏水少的效果， 提升使用该阀后的咖啡机的整体品质。 4、 排气阀芯的头部开设有凹槽， 因该凹槽的存在， 便于对进水腔进行排气， 不会因空 抽而抽不上水。 附图说明
图 1为本发明实施例的立体结构示意图；
图 2为本发明实施例的结构剖视图；
图 3为图 2的 A— A向剖视图；
图 4为图 2的 B—B向剖视图；
图 5为图 2的 C一 C向剖视图；
图 6为本发明实施例去掉盖板和密封垫后的立体结构示意图。 具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
如图 1〜6所示， 为本发明的一个优选实施例。
一种回水可调节的咖啡机用阀结构， 包括有阀体 1， 阀体内具有进水腔 11、 出水腔 12、 调压腔 13和回流腔 14。
出水腔 12的头部通过开设在进水腔侧壁上的出水孔 111与进水腔 11连通， 出水腔 12内安装有硅胶材质制成的单向阀芯 2， 单向阀芯 2的头部抵在出水孔 111上， 后部顶 持有单向阀压缩弹簧 21， 从而使单向阀芯 2始终具有封住出水孔 111的趋势。
出水腔 12的尾部密封连接有出水管接头 6。 出水管接头 6以可相对出水腔 12旋转 的方式密封连接在阀体的出水腔 12尾部。 即在出水腔 12的尾部呈台阶形扩张孔， 并因 此而在出水腔 12的外侧壁上形成有外肩 122,出水管接头 6的头部呈与该台阶形扩张孔 相适配的台阶形， 出水管接头 6插配在出水腔 12尾部且二者的对接面上设置有密封圈 61， 出水管接头 6的外侧还成型有卡扣 62， 卡扣 62扣接在出水腔 12外侧壁的外肩 122 上。
调压腔 13的头部通过开设在出水腔侧壁上的泄压孔 121与出水腔 12连通，调压腔 13内安装有硅胶材质制成的泄压阀芯 3， 泄压阀芯 3的头部抵在泄压孔 121上， 后部顶 持有弹力大于单向阀压缩弹簧 21的弹力的泄压阀压缩弹簧 31， 从而使泄压阔芯 3始终 具有封住泄压孔 121 的趋势， 泄压阀压缩弹簧 31 的后端设有调压螺丝 4， 调压螺丝 4 通过螺纹和密封圈而密封螺接在调压腔 13尾部。
回流腔 14与调压腔 13连通； 由于产品的结构特点， 及模具设计的原理， 不适合在 阀体 1内部进行抽芯设计， 因此不方便直接在阔体 1内部设置通道将回流腔 14与调压 腔 13连通， 为解决这一技术难题， 我们在阀体 1的外端面具有凹腔 16， 该凹腔 16的底 面上设有环形凹槽 161， 环槽凹槽 161底面的一侧开有与调压腔 13相通的第一孔 162， 环槽凹槽 161底面的另一侧开有与回流腔 14相通的第二孔 163， 凹腔 16的开口处设有 端盖 7密封。凹腔 16的中部设有螺纹孔 164，端盖 7通过螺钉 71固定在凹腔 16上，且 在端盖 7和凹腔 16之间还设有外形与凹腔 16开口相配的密封垫 72。
回流腔 14具有横向的流道 14a和竖向的出口通道 14b,出口通道 14b的头部通过开 设在流道 14a侧壁上的穿孔 14c与流道 14a连通， 流道 14a尾部的开口处设有堵头 8密 封， 本实施例中堵头 8和端盖 7为一体件， 出口通道 14b的尾部密封连接有回流管接头 9， 第一孔 462与流道 14a相通。
回流管接头 9以可相对出口通道 14b旋转的方式密封连接在出口通道 14b的尾部。 出口通道 14b的尾部呈台阶形扩张孔，并因此而在出口通道 14b的外侧壁上形成有外肩 14d， 回流管接头 9的头部呈与该台阶形扩张孔相适配的台阶形， 回流管接头 9插配在 出口通道 14b尾部且二者的对接面上设置有密封圈 91，回流管接头 9的外侧还成型有卡 扣 92， 卡扣 92扣接在出口通道 14b外侧壁的外肩 14d上。
阀体 1内还具有回水调节腔 15， 回水调节腔 15的头部通过开设在进水腔侧壁上的 回水孔 112与进水腔 11连通， 回水调节腔 15的头部还通过开设在回流腔的流道 14a的 侧壁上的排气孔 141与回流腔 14连通，进水腔 11内安装有柔性硅胶材质的排气阀芯 5， 排气阀芯 5的头部开设有凹槽 51且抵在排气孔 141上，后部顶持有排气阀压縮弹簧 52， 排气阀压缩弹簧 52后端设有调节螺丝 53，调节螺丝 53通过螺紋和密封圈螺接在回水调 节腔 15尾部。 本发明的工作过程和原理如下：
使用前， 将进水腔 11直接与微型水泵的供水管螺紋相连， 将出水腔 12通过出水管 接头 6与锅炉连接， 将回水腔 12通过回水管接头 9与会水箱连通。
微型水泵初次启动或停了一段时间后再启动时， 如果泵体内有空气， 因为排气阀芯 5的头部开设有凹槽 51， 排气阀芯 5在排气阀压缩弹簧 52的作用下尚不能完全封住排 气孔 141， 泵体内的空气得以从排气孔 141排出， 空气排出后， 微型水泵开始抽水， 进 水腔 11压力增大， 排气阀芯 5在此压力作用下变形进一步将排气孔 141堵死， 进水腔 11内压力进一步增大后， 即顶开出水腔 12内的单向阀芯 2顺出水腔 12及出水管接头 6 进入锅炉， 锅炉内压力达到设定要求后， 将打开锅炉中出水弹簧开始冲泡咖啡； 当锅炉 内水的压力超过设定值时， 即顶开调压腔 13内的泄压阀芯 3， 经回流腔 14及回流管接 头 9流回水箱。
当本发明自动阀用于不同规格压力的供水装置时， 只需调节安装在调压腔 13尾部 的调压螺丝 4即可。
如果回水调节腔 15内的排气阀压缩弹簧 51对排气阀芯 5的预紧压力过小，导致漏 水情况严重， 或者排气阀压缩弹簧 51对排气阀芯 5的预紧压力过大， 而导致排气不畅， 这时只需在外部调节安装在回水调节腔 15内调节螺丝 52即可。

Claims

权 利 要 求
1、 一种回水可调节的咖啡机用闽结构，
包括有阀体 (1)， 阀体内具有进水腔 (11)、 出水腔 (12)、 调压腔 (13)和回流腔 (14); 出水腔 (12)的头部通过开设在进水腔侧壁上的出水孔 (111)与进水腔 (11)连通， 出水 腔 (12)内安装有单向阀芯 (2)， 单向阀芯 (2)的头部抵在出水孔 (111)上， 后部顶持有单向阀 压缩弹簧 (21)， 从而使单向阀芯 (2)始终具有封住出水孔 (111)的趋势；
调压腔 (13)的头部通过开设在出水腔侧壁上的泄压孔 (121)与出水腔 (12)连通， 调压 腔 (13)内安装有泄压阀芯 (3)， 泄压阔芯 (3)的头部抵在泄压孔 (121)上，后部顶持有弹力大 于单向阀压缩弹簧 (21)的弹力的泄压阀压缩弹簧 (31)， 从而使泄压阀芯 (3)始终具有封住 泄压孔 (121)的趋势， 泄压阀压缩弹簧 (31)的后端设有调压螺丝 (4), 调压螺丝 (4)密封螺接 在调压腔 (13)尾部；
回流腔 (14)与调压腔 (13)连通；
其特征在于： 所述闽体 (1)内还具有回水调节腔 (15)， 回水调节腔 (15)的头部通过开 设在进水腔侧壁上的回水孔 (112)与进水腔 (11)连通， 回水调节腔 (15)的头部还通过开设 在所述回流腔侧壁上的排气孔 (141)与所述回流腔 (14)连通， 进水腔 (11)内安装有柔性材 质的排气阀芯 (5)，排气阀芯 (5)的头部开设有凹槽 (51)且抵在排气孔 (141)上，后部顶持有 排气阀压缩弹簧 (52)， 排气阔压缩弹簧 (52)后端设有调节螺丝 (53)， 调节螺丝 (53)密封螺 接在回水调节腔 (15)尾部。
2、根据权利要求 1所述的咖啡机用阀结构， 其特征在于： 所述出水腔 (12)的尾部密 封连接有出水管接头 (6)。
3、 根据权利要求 2所述的咖啡机用阀结构， 其特征在于： 所述出水管接头 (6)以可 相对所述出水腔 (12)旋转的方式密封连接在所述阀体的出水腔 (12)尾部。
4、根据权利要求 3所述的咖啡机用阀结构， 其特征在于： 所述出水腔 (12)的尾部呈 台阶形扩张孔， 并因此而在所述出水腔 (12)的外侧壁上形成有外肩 (122)， 所述出水管接 头 (6)的头部呈与该台阶形扩张孔相适配的台阶形， 所述出水管接头 (6)插配在所述出水 腔 (12)尾部且二者的对接面上设置有密封圈 (61)， 所述出水管接头 (6)的外侧还成型有卡 扣 (62)， 卡扣 (62)扣接在所述出水腔 (12)外侧壁的外肩 (122)上。
5、 根据权利要求 1〜4中任一权利要求所述的咖啡机用阀结构， 其特征在于： 所述 阀体 (1)的外端面具有凹腔 (16)， 该凹腔 (16)的底面上设有环形凹槽 (161)， 环槽凹槽 (161) 底面的一侧开有与所述调压腔 (13)相通的第一孔 (162)，环槽凹槽 (161)底面的另一侧开有 与所述回流腔 (14)相通的第二孔 (163)， 所述凹腔 (16)的开口处设有端盖 (7)密封。
6、根据权利要求 5所述的咖啡机用阀结构， 其特征在于： 所述凹腔 (16)的中部设有 螺纹孔 (164)， 所述端盖 (7)通过螺钉 (71)固定在凹腔 (16)上， 且在端盖 (7)和凹腔 (16)之间 还设有外形与凹腔 (16)开口相配的密封垫 (72)。
7、根据权利要求 5所述的咖啡机用阀结构， 其特征在于： 所述回流腔 (14)具有横向 的流道 (14a)和竖向的出口通道 (14b), 出口通道 (14b)的头部通过开设在流道 (14a)侧壁上 的穿孔 (14c)与流道 (14a)连通， 流道 (14a)尾部的开口处设有堵头 (8)密封， 出口通道 (14b) 的尾部密封连接有回流管接头 (9)， 所述第一孔 (462)与所述流道 (14a)相通。
8、 根据权利要求 7所述的咖啡机用阀结构， 其特征在于： 所述回流管接头 (9)以可 相对所述出口通道 (14b)旋转的方式密封连接在所述出口通道 (14b)的尾部。
9、 根据权利要求 8所述的咖啡机用阀结构， 其特征在于： 所述出口通道 (14b)的尾 部呈台阶形扩张孔， 并因此而在所述出口通道 (14b)的外侧壁上形成有外肩 (14d)， 所述 回流管接头 (9)的头部呈与该台阶形扩张孔相适配的台阶形， 所述回流管接头 (9)插配在 所述出口通道 (14b)尾部且二者的对接面上设置有密封圈 (91)，所述回流管接头 (9)的外侧 还成型有卡扣 (92), 卡扣 (92)扣接在所述出口通道 (14b)外侧壁的外肩 (14d)上。
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