WO2018176488A1 - 复合滤芯和重力净水器 - Google Patents

复合滤芯和重力净水器 Download PDF

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Publication number
WO2018176488A1
WO2018176488A1 PCT/CN2017/079354 CN2017079354W WO2018176488A1 WO 2018176488 A1 WO2018176488 A1 WO 2018176488A1 CN 2017079354 W CN2017079354 W CN 2017079354W WO 2018176488 A1 WO2018176488 A1 WO 2018176488A1
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WO
WIPO (PCT)
Prior art keywords
filter element
exhaust
composite filter
water tank
primary filter
Prior art date
Application number
PCT/CN2017/079354
Other languages
English (en)
French (fr)
Inventor
柯映充
黎泽平
宋国栋
孙天厚
Original Assignee
佛山市顺德区美的饮水机制造有限公司
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 佛山市顺德区美的饮水机制造有限公司 filed Critical 佛山市顺德区美的饮水机制造有限公司
Priority to PCT/CN2017/079354 priority Critical patent/WO2018176488A1/zh
Priority to CN201780002303.9A priority patent/CN108124431A/zh
Publication of WO2018176488A1 publication Critical patent/WO2018176488A1/zh

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/02—Combinations of filters of different kinds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration

Definitions

  • the invention relates to the field of household appliances, in particular to a composite filter element and a gravity water purifier.
  • the common gravity water purifier includes a raw water tank and a clean water tank located below the original water tank.
  • the raw water tank is connected to the clean water tank through the filter element, and the raw water in the original water tank is filtered by the filter element to become purified water under the action of gravity. After that, it flows into the clean water tank.
  • the filter element usually adopts a composite filter element, and the composite filter element comprises a primary filter element for coarse filtration and a secondary filter element for fineness, and the primary filter element is connected to the upper end of the secondary filter element.
  • the main object of the present invention is to provide a composite filter element designed to avoid air blockage at the junction of the primary filter element and the secondary filter element.
  • the composite filter element proposed by the present invention is used for a gravity water purifier, and the composite filter element comprises:
  • An exhaust passage is disposed in the primary filter element, and the exhaust passage extends upward from a junction of the primary filter element and the secondary filter element to an upper end of the primary filter element, and the exhaust passage The upper end is provided with an exhaust port;
  • An exhaust assembly is further disposed at an upper end of the exhaust passage, the exhaust assembly opening the exhaust port when subjected to upward exhaust pressure from the exhaust passage, and at the exhaust pressure When it disappears, the exhaust port is sealed.
  • the exhaust assembly includes an exhaust ball and an exhaust cap having a exhaust hole, the exhaust ball being disposed at the exhaust port, the exhaust cap being fixedly coupled to an upper end of the exhaust passage And the exhaust cap covers the exhaust ball and the exhaust port.
  • the exhaust cap is disposed at an upper end of the exhaust passage.
  • the exhaust hole has an elongated shape, and the exhaust hole extends in an up and down direction.
  • the outer peripheral surface of the exhaust cap is provided with an annular reinforcing rib formed to extend outward in the radial direction.
  • the upper end of the exhaust passage is contracted such that the diameter of the exhaust port is smaller than the diameter of the exhaust passage.
  • the inner mouth of the exhaust port is chamfered along a bevel, and the bevel chamfer is tangent to the exhaust ball.
  • the material of the exhaust ball is made of PP plastic material.
  • an upper cover of the primary filter element is detachably provided with an upper cover, and a water inlet of the primary filter element is disposed on the upper cover; an upper end of the exhaust passage extends to a position close to the upper cover, The exhaust assembly is located on a lower side of the upper cover.
  • the secondary filter element is detachably coupled to the lower end of the primary filter element.
  • the invention also provides a gravity water purifier comprising a raw water tank, a clean water tank, and a composite filter element, the composite filter element comprising:
  • An exhaust passage is disposed in the primary filter element, and the exhaust passage extends upward from a junction of the primary filter element and the secondary filter element to an upper end of the primary filter element, and the exhaust passage The upper end is provided with an exhaust port;
  • An exhaust assembly is further disposed at an upper end of the exhaust passage, the exhaust assembly opening the exhaust port when subjected to upward exhaust pressure from the exhaust passage, and at the exhaust pressure Sealing the exhaust port when disappearing;
  • the clean water tank is disposed under the raw water tank, the upper end of the primary filter element is located in the raw water tank, the lower end of the secondary filter element is located in the clean water tank, and the raw water tank passes through the The primary filter element and the secondary filter element are in communication with the clean water tank.
  • a combination of an exhaust passage and an exhaust assembly is provided, and the exhaust passage extends upward from the connection of the primary filter element and the secondary filter element to the upper end of the primary filter element, and on the one hand, receives the row from the row.
  • the exhaust unit When the upward exhaust pressure is in the gas passage, the exhaust unit opens the exhaust port, so that the air at the junction of the primary filter element and the secondary filter element can pass through the exhaust passage, the exhaust port, the upper end of the primary filter element, and The original water tank is discharged, thereby avoiding the air blockage phenomenon at the connection between the primary filter element and the secondary filter element, thereby ensuring smooth water discharge of the composite filter element; on the other hand, when the upward exhaust pressure in the exhaust passage disappears, the exhaust component The exhaust port is sealed to prevent the raw water in the raw water tank from directly entering the secondary filter element from the exhaust port via the exhaust passage, thereby preventing the filtration effect of the composite filter element from being affected by the water in the exhaust port.
  • FIG. 1 is a schematic structural view of an embodiment of a gravity water purifier according to the present invention.
  • Figure 2 is a schematic cross-sectional view of the gravity water purifier of Figure 1 along the S-S direction; wherein the shaded arrows indicate the direction of the water outlet, and the hollow arrows indicate the direction of the exhaust;
  • Figure 3 is an enlarged schematic view of A in Figure 2;
  • FIG. 4 is a schematic structural view of the exhaust cap of FIG. 3.
  • the directional indication is only used to explain in a certain posture (as shown in the drawing)
  • the relative positional relationship between the components, the motion situation, and the like if the specific posture changes, the directional indication also changes accordingly.
  • first”, “second”, etc. in the embodiments of the present invention, the description of the "first”, “second”, etc. is used for the purpose of description only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • the invention provides a composite filter element and a gravity water purifier having the composite filter element.
  • the gravity water purifier includes a raw water tank 2, a clean water tank 3, and a composite filter element 1.
  • the composite filter element 1 includes a primary filter element 11 and a secondary filter element 12 connected to the lower end of the primary filter element 11; the clean water tank 3 is disposed below the raw water tank 2, and the upper end of the primary filter element 11 is located in the original water tank 2, The lower end of the filter element 12 is located in the clean water tank 3, and the raw water tank 2 is sequentially connected to the clean water tank 3 through the primary filter element 11 and the secondary filter element 12, so that the raw water in the raw water tank 2 is sequentially combined under the action of gravity.
  • the primary filter element and the secondary filter element of the filter element 1 are filtered to become purified water, and then flow into the clean water tank 3.
  • the filter medium commonly used in the primary filter element 11 is activated carbon, ion exchange resin, medical stone, etc.; and the filter medium commonly used in the secondary filter element 12 is an ultrafiltration membrane, a PP cotton rod, and the like. Filtration of higher filter media.
  • the primary filter element 11 is provided with an exhaust passage 111 extending upward from the junction of the primary filter element 11 and the secondary filter element 12 to the upper end of the primary filter element 11, and the exhaust gas is exhausted.
  • the upper end of the passage 111 is provided with an exhaust port 111a.
  • the upper end of the exhaust passage 111 is further provided with an exhaust assembly 112, which opens the exhaust port 111a when subjected to upward exhaust pressure from the exhaust passage 111, thus, the primary filter
  • the air at the junction of the second and second filter elements 12 can be discharged through the exhaust passage 111, the exhaust port 111a, the upper end of the primary filter element 11, and the raw water tank 2, thereby avoiding the connection of the primary filter element 11 and the secondary filter element 12
  • the phenomenon of air blockage ensures the smooth flow of the composite filter element 1.
  • the exhaust assembly 112 seals the exhaust port 111a to prevent the raw water in the raw water tank 2 from directly passing through the exhaust port 111a.
  • the passage 111 enters the secondary filter element 12, thereby preventing the filtering effect of the composite filter element 1 from being affected by the water venting of the exhaust port 111a.
  • the exhaust assembly 112 includes an exhaust ball 112a and an exhaust cap 112b having a venting opening 1121.
  • the exhaust ball 112a is placed on the exhaust port 111a of the exhaust passage 111, such that when the exhaust ball 112a is subjected to upward exhaust pressure from the exhaust passage 111, the exhaust ball 112a is The air pressure is jacked up, and the exhaust port 111a is opened to discharge the air; and when the upward exhaust pressure in the exhaust passage 111 disappears, the exhaust ball 112a is reset, and the exhaust port 111a is sealed to avoid stringing water.
  • the exhaust port 111a is a circular opening.
  • the exhaust cap 112b is fixedly connected to the upper end of the exhaust passage 111, and the exhaust cap 112b covers the exhaust ball 112a and the exhaust port 111a. It can be understood that the arrangement of the exhaust cap 112b can restrict the exhaust ball. 112a is separated from the exhaust port 111a.
  • the inner opening of the exhaust port 111a is provided with a bevel chamfer 1111 which is tangent to the exhaust ball 112a to facilitate sealing of the exhaust ball 112a to the exhaust port 111a, thereby preventing water from collapsing.
  • the upper end of the exhaust passage 111 is contracted so that the diameter of the exhaust port 111a is smaller than the diameter of the exhaust passage 111.
  • the smaller exhaust port 111a requires a smaller matching exhaust ball 112a, while the smaller exhaust ball 112a is lighter in weight and is easily lifted by the exhaust pressure; After the contraction is set, the exhaust gas pressure at the exhaust port 111a is increased, which is also advantageous for the jacking of the exhaust ball 112a.
  • the material of the exhaust ball 112a is preferably made of plastic material, the plastic material has a moderate weight, is not too heavy to be lifted up, and is not too light to affect the sealing effect on the exhaust port 111a;
  • the material of the balloon 112a is usually made of PP plastic.
  • the PP plastic has good heat resistance and chemical stability, and is non-toxic and can be used in a gravity water purifier.
  • the exhaust cap 112b is preferably fixed to the upper end of the exhaust passage 111 by means of an interference fit.
  • the fixing structure is simple, and the fixing process does not require the use of additional tools, and the assembly process is simpler.
  • the exhaust hole 1121 is preferably disposed in an elongated shape, and the exhaust hole 1121 extends in the up and down direction.
  • the exhaust cap 112b is pressed downward to realize the exhaust.
  • the exhaust cap 112b is easily expanded to the outer shape, so that the entire assembly process is smoother.
  • the exhaust is installed after the lower press sleeve is installed. The cap 112b recovers the reset so that the exhaust cap 112b is stably fixed to the upper end of the exhaust passage 111.
  • the outer peripheral surface of the exhaust cap 112b is provided with an annular reinforcing rib 1122 extending outward in the radial direction to improve the shape stability of the exhaust cap 112b, and the exhaust cap 112b is prevented from being deformed too easily and easily arranged.
  • the upper end of the air passage 111 is disengaged.
  • the annular reinforcing rib 1122 is generally disposed at the lower end of the outer peripheral surface of the exhaust cap 112b.
  • the portion of the exhaust cap 112b that is sleeved at the upper end of the exhaust passage 111 is not easily deformed, and on the other hand, can be avoided.
  • the opening position of the vent hole 1121 is occupied.
  • the upper end of the primary filter element 11 is detachably provided with the upper cover 113, and is generally, but not limited to, implemented by snapping or screwing, so that only When the upper cover 113 is detached from the upper end of the primary filter element 11, the filter medium in the primary filter element 11 can be replaced, and the convenience of replacement of the filter material is improved.
  • the water inlet of the primary filter element 11 is disposed on the upper cover 113; without loss of generality, the water inlet of the primary filter element 11 is in the form of a plurality of water inlet holes on the upper cover 113.
  • the upper end of the exhaust passage 111 extends to a position close to the upper cover 113, and the exhaust assembly 112 is located on the lower side of the upper cover 113.
  • the air discharged from the exhaust assembly 112 is passed through the upper cover 113.
  • the water inlet hole is discharged into the raw water tank 2; at the same time, the replacement of the exhaust unit 112 can also be realized after the upper cover 113 is removed, and the upper cover 113 can provide the exhaust assembly 112 with the isolation protection of the touch.
  • the secondary filter element 12 is detachably connected to the lower end of the primary filter element 11, and can be generally, but not limited to, implemented by means of screwing or snapping. Thus, only the secondary filter element 12 needs to be removed from the primary filter element 11 When the lower end is disassembled, the filter material in the secondary filter element 12 or the secondary filter element 12 can be replaced, thereby improving the convenience of the filter material replacement.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

一种复合滤芯（1）和重力净水器。该复合滤芯（1）包括一级滤芯（11）；以及二级滤芯（12），连接于该一级滤芯（11）的下端；该一级滤芯（11）内设有排气通道（111），该排气通道（111）自该一级滤芯（11）与该二级滤芯（12）的连接处朝上延伸至该一级滤芯（11）的上端，且该排气通道（111）的上端设有排气口（111a）；该排气通道（111）的上端还设有排气组件（112），该排气组件（112）在受到来自该排气通道（111）内的朝上排气压力时，打开该排气口（111a），且在该排气压力消失时，密封该排气口（111a）。该技术方案能避免一级滤芯（11）与二级滤芯（12）的连接处出现气堵现象。

Description

复合滤芯和重力净水器
技术领域
本发明涉及家用电器领域，特别涉及一种复合滤芯和重力净水器。
背景技术
目前，常见的重力净水器包括原水箱和位于原水箱下方的净水箱，原水箱通过滤芯与净水箱连通，原水箱内的原水在重力的作用下，经滤芯过滤而变成净水后，流入净水箱中。为提高重力净水器的过滤效果，所述滤芯通常采用复合滤芯，复合滤芯包括用以粗滤的一级滤芯和用以精率的二级滤芯，一级滤芯连接在二级滤芯上端。然而，此类复合滤芯在初始使用或停机后的再次启用时，复合滤芯内的空气会难以排出，而形成气堵现象，从而导致复合滤芯不出水或出水速度过小，为此，用户在使用时需通过拍打或敲打的方式来排掉堵在复合滤芯里的空气，从而影响产品的消费者体验。
发明内容
本发明的主要目的是提出一种复合滤芯，旨在避免其一级滤芯与二级滤芯的连接处出现气堵现象。
为实现上述目的，本发明提出的复合滤芯用于重力净水器，所述复合滤芯包括：
一级滤芯；以及
二级滤芯，连接于所述一级滤芯的下端；
所述一级滤芯内设有排气通道，所述排气通道自所述一级滤芯与所述二级滤芯的连接处朝上延伸至所述一级滤芯的上端，且所述排气通道的上端设有排气口；
所述排气通道的上端还设有排气组件，所述排气组件在受到来自所述排气通道内的朝上排气压力时，打开所述排气口，且在所述排气压力消失时，密封所述排气口。
优选地，所述排气组件包括排气球和具有排气孔的排气帽，所述排气球置于所述排气口，所述排气帽与所述排气通道的上端固定连接，且所述排气帽盖设所述排气球和所述排气口。
优选地，所述排气帽过盈适配套设在所述排气通道上端。
优选地，所述排气孔呈长条状，且所述排气孔沿上下方向延伸。
优选地，所述排气帽的外周面设有沿径向方向向外延伸形成的环形加强筋。
优选地，所述排气通道的上端作收缩设置，以使所述排气口的口径小于所述排气通道的直径。
优选地，所述排气口的内口沿设有斜面倒角，所述斜面倒角与所述排气球相切。
优选地，所述排气球的材质为PP塑料材质。
优选地，所述一级滤芯的上端可拆卸地设有上盖，所述一级滤芯的进水口设于所述上盖；所述排气通道的上端延伸至靠近所述上盖的位置，所述排气组件位于所述上盖下侧。
优选地，所述二级滤芯可拆卸地连接在所述一级滤芯的下端。
本发明还提出一种重力净水器，包括原水箱、净水箱、以及复合滤芯，所述复合滤芯包括：
一级滤芯；以及
二级滤芯，连接于所述一级滤芯的下端；
所述一级滤芯内设有排气通道，所述排气通道自所述一级滤芯与所述二级滤芯的连接处朝上延伸至所述一级滤芯的上端，且所述排气通道的上端设有排气口；
所述排气通道的上端还设有排气组件，所述排气组件在受到来自所述排气通道内的朝上排气压力时，打开所述排气口，且在所述排气压力消失时，密封所述排气口；
所述净水箱设于所述原水箱下方，所述一级滤芯的上端位于所述原水箱内，所述二级滤芯的下端位于所述净水箱内，且所述原水箱依次通过所述一级滤芯和所述二级滤芯与所述净水箱连通。
本发明的技术方案中增设有排气通道和排气组件的组合，该排气通道自一级滤芯与二级滤芯的连接处朝上延伸至一级滤芯的上端，一方面，在受到来自排气通道内的朝上排气压力时，排气组件会打开排气口，如此，一级滤芯与二级滤芯的连接处的空气可经由排气通道、排气口、一级滤芯的上端和原水箱排出，从而避免一级滤芯与二级滤芯的连接处出现气堵现象，进而保证复合滤芯的出水顺畅；另一方面，在排气通道内的朝上排气压力消失时，排气组件会密封排气口，以避免原水箱内的原水直接从排气口经由排气通道进入到二级滤芯，从而避免复合滤芯的过滤效果因排气口串水而受到影响。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明重力净水器一实施例的结构示意图；
图2为图1中重力净水器沿S-S方向的截面结构示意图；其中，阴影箭头所示的是出水方向，空心箭头所示的是排气方向；
图3为图2中A处的放大示意图；
图4为图3中排气帽的结构示意图。
附图标号说明：
标号 名称 标号 名称
1 复合滤芯 11 一级滤芯
12 二级滤芯 111 排气通道
112 排气组件 113 上盖
111a 排气口 1111 斜面倒角
112a 排气球 112b 排气帽
1121 排气孔 1122 环形加强筋
2 原水箱 3 净水箱
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种复合滤芯、以及一种具有该复合滤芯的重力净水器。
参照图1和图2，在本发明一实施例中，该重力净水器包括原水箱2、净水箱3、以及复合滤芯1。其中，复合滤芯1包括一级滤芯11、以及连接于一级滤芯11下端的二级滤芯12；净水箱3设于原水箱2下方，一级滤芯11的上端位于原水箱2内，二级滤芯12的下端位于净水箱3内，且原水箱2依次通过一级滤芯11和二级滤芯12与净水箱3连通，如此，原水箱2内的原水在重力的作用下，依次经复合滤芯1的一次滤芯和二次滤芯的过滤而变成净水后，流入净水箱3中。不失一般性，一级滤芯11内所通常采用的滤材为活性炭、离子交换树脂、麦饭石等；而二级滤芯12内所通常采用的滤材为超滤膜、PP棉棒等其他过滤精度较高滤材。
本实施例中，一级滤芯11内设有排气通道111，该排气通道111自一级滤芯11与二级滤芯12的连接处朝上延伸至一级滤芯11的上端，且该排气通道111的上端设有排气口111a。同时，该排气通道111的上端还设有排气组件112，在受到来自排气通道111内的朝上排气压力时，该排气组件112会打开排气口111a，如此，一级滤芯11与二级滤芯12的连接处的空气可经由排气通道111、排气口111a、一级滤芯11的上端和原水箱2排出，从而避免一级滤芯11与二级滤芯12的连接处出现气堵现象，进而保证复合滤芯1的出水顺畅。另外，本实施例中，在排气通道111内的朝上排气压力消失时，排气组件112会密封排气口111a，以避免原水箱2内的原水直接从排气口111a经由排气通道111进入到二级滤芯12，从而避免复合滤芯1的过滤效果因排气口111a串水而受到影响。
一并参照图3，在本实施例中，进一步地，排气组件112包括排气球112a和具有排气孔1121的排气帽112b。其中，排气球112a置于排气通道111的排气口111a上，如此，当排气球112a受到来自排气通道111内的朝上排气压力时，排气球112a会被所述排气压力顶起，而使排气口111a打开，将空气排出；而当排气通道111内的朝上排气压力消失时，排气球112a会复位，而密封排气口111a，避免串水；可以理解，排气口111a为圆形口。本实施例中，排气帽112b与排气通道111的上端固定连接，且排气帽112b盖设排气球112a和排气口111a，可以理解，排气帽112b的设置可限制排气球112a脱离排气口111a。优选地，排气口111a的内口沿设有斜面倒角1111，该斜面倒角1111与排气球112a相切，以利于排气球112a对排气口111a的密封，从而防止串水。
在本实施例中，进一步地，排气通道111的上端作收缩设置，以使排气口111a的口径小于排气通道111的直径。可以理解，一方面，较小的排气口111a所需匹配的排气球112a较小，而较小的排气球112a重量较轻，容易被排气压力所述顶起；另一方面，收缩设置后，排气口111a处的排气气压会增大，也利于排气球112a的顶起。本实施例中，排气球112a的材质优选为塑料材质，塑料材质重量适中，不至于过重而难以被顶起，也不至于过轻而影响对排气口111a的密封作用；并且，排气球112a的材质通常采用PP塑料材质，PP塑料具有良好的耐热性和化学稳定性，且无毒，可用在重力净水器中。
本实施例中，排气帽112b优选通过过盈适配套设的方式固定在排气通道111的上端，此固定结构简单，且固定过程无需使用额外工具，装配过程更为简便。
一并参照图4，在排气帽112b上，排气孔1121优选呈长条状设置，且排气孔1121沿上下方向延伸，如此，在将排气帽112b在往下压而实现排气帽112b与排气通道111上端的过盈套设安装的过程中，排气帽112b容易向外形变而被撑大，使得整个装配过程更为顺畅；另外，在下压套设安装到位后排气帽112b会回收复位，使排气帽112b稳定地固定在排气通道111上端。
进一步地，排气帽112b的外周面设有沿径向方向向外延伸形成的环形加强筋1122，以提高排气帽112b的形状稳定性，避免排气帽112b过于容易出现变形而易于与排气通道111的上端脱离。不失一般性，该环形加强筋1122通常设在排气帽112b外周面的下端，一方面可使得排气帽112b的套设于排气通道111上端的部分不易于形变，另一方面可避免排气孔1121的开设位置被占用。
参照图2，在本实施例中，进一步地，一级滤芯11的上端可拆卸地设有上盖113，且通常可但不限于通过卡接或者螺钉锁附的方式实现，如此，只需要将上盖113从一级滤芯11的上端拆卸下，即可对一级滤芯11内的滤材进行更换，提高了滤材更换的便利性。可以理解，本实施例中，一级滤芯11的进水口设于上盖113；不失一般性，该一级滤芯11的进水口在上盖113上是以多个进水孔的形式存在的。另外，本实施例中，排气通道111的上端延伸至靠近上盖113的位置，且排气组件112位于上盖113下侧，如此，自排气组件112排出的空气是经上盖113的进水孔排入原水箱2的；同时，排气组件112的更换也是在拆下上盖113之后方能实现的，上盖113可给排气组件112提供触碰的隔离保护。
进一步地，二级滤芯12可拆卸地连接在一级滤芯11的下端，且通常可但不限定于通过螺纹连接或者卡接的方式实现，如此，只需要将二级滤芯12从一级滤芯11的下端拆卸下，即可对二级滤芯12或者二级滤芯12内的滤材进行更换，提高了滤材更换的便利性。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (11)

  1. 一种复合滤芯，用于重力净水器，其特征在于，所述复合滤芯包括：
    一级滤芯；以及
    二级滤芯，连接于所述一级滤芯的下端；
    所述一级滤芯内设有排气通道，所述排气通道自所述一级滤芯与所述二级滤芯的连接处朝上延伸至所述一级滤芯的上端，且所述排气通道的上端设有排气口；
    所述排气通道的上端还设有排气组件，所述排气组件在受到来自所述排气通道内的朝上排气压力时，打开所述排气口，且在所述排气压力消失时，密封所述排气口。
  2. 如权利要求1所述的复合滤芯，其特征在于，所述排气组件包括排气球和具有排气孔的排气帽，所述排气球置于所述排气口，所述排气帽与所述排气通道的上端固定连接，且所述排气帽盖设所述排气球和所述排气口。
  3. 如权利要求2所述的复合滤芯，其特征在于，所述排气帽过盈适配套设在所述排气通道上端。
  4. 如权利要求3所述的复合滤芯，其特征在于，所述排气孔呈长条状，且所述排气孔沿上下方向延伸。
  5. 如权利要求4所述的复合滤芯，其特征在于，所述排气帽的外周面设有沿径向方向向外延伸形成的环形加强筋。
  6. 如权利要求2所述的复合滤芯，其特征在于，所述排气通道的上端作收缩设置，以使所述排气口的口径小于所述排气通道的直径。
  7. 如权利要求2所述的复合滤芯，其特征在于，所述排气口的内口沿设有斜面倒角，所述斜面倒角与所述排气球相切。
  8. 如权利要求2所述的复合滤芯，其特征在于，所述排气球的材质为PP塑料材质。
  9. 如权利要求1所述的复合滤芯，其特征在于，所述一级滤芯的上端可拆卸地设有上盖，所述一级滤芯的进水口设于所述上盖；所述排气通道的上端延伸至靠近所述上盖的位置，所述排气组件位于所述上盖下侧。
  10. 如权利要求1所述的复合滤芯，其特征在于，所述二级滤芯可拆卸地连接在所述一级滤芯的下端。
  11. 一种重力净水器，其特征在于，包括原水箱、净水箱、以及如权利要求1至10任一项所述的复合滤芯，所述净水箱设于所述原水箱下方，所述复合滤芯的一级滤芯的上端位于所述原水箱内，所述复合滤芯的二级滤芯的下端位于所述净水箱内，且所述原水箱依次通过所述一级滤芯和所述二级滤芯与所述净水箱连通。
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