WO2018176489A1 - 滤芯和重力净水器 - Google Patents

滤芯和重力净水器 Download PDF

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Publication number
WO2018176489A1
WO2018176489A1 PCT/CN2017/079356 CN2017079356W WO2018176489A1 WO 2018176489 A1 WO2018176489 A1 WO 2018176489A1 CN 2017079356 W CN2017079356 W CN 2017079356W WO 2018176489 A1 WO2018176489 A1 WO 2018176489A1
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WO
WIPO (PCT)
Prior art keywords
filter element
filter
cover
current limiting
water tank
Prior art date
Application number
PCT/CN2017/079356
Other languages
English (en)
French (fr)
Inventor
黎泽平
柯映充
孙天厚
宋国栋
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/CN2017/079356 priority Critical patent/WO2018176489A1/zh
Priority to CN201780002304.3A priority patent/CN109005663B/zh
Publication of WO2018176489A1 publication Critical patent/WO2018176489A1/zh

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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
    • 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
    • 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
    • B01D35/30—Filter housing constructions
    • 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
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds

Definitions

  • the invention relates to the field of household appliances, in particular to a 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. Since the water outlet of the common filter element is large, the water output speed of the filter element is high, and the raw water will quickly pass through the filter element, resulting in a short contact time between the raw water and the filter medium in the filter element, and the filtering effect is poor.
  • the main object of the present invention is to provide a filter element which aims to reduce the water discharge speed of the filter element, thereby prolonging the contact time between the water and the filter medium in the filter element, thereby improving the filtration effect of the filter element.
  • the filter element proposed by the present invention is used for a gravity water purifier, and the filter element comprises:
  • the filter body has a water outlet at the lower end
  • a current limiting cover is disposed at a lower end of the filter body and is disposed at the water outlet, and the current limiting cover is provided with a current limiting port that communicates with the water outlet; the current limiting port is smaller than the current limiting port Outlet.
  • the orifice has a diameter ranging from 2.5 mm to 5 mm.
  • the current limiting cover is detachably connected to a lower end of the filter body.
  • the current limiting cover is engaged with the lower end of the filter body.
  • the current limiting cover has a first cover edge sleeved on a lower end of the filter element body, and one of an inner circumferential surface of the first cover edge and an outer circumferential surface of the lower end of the filter element body is provided with a ring card
  • the slot is provided with an annular snap that fits into the annular card slot.
  • the current limiting cover has a first cover edge sleeved on the lower end of the filter element body, and the first cover is provided with a sealing ring along the lower end of the filter element body.
  • an outer circumferential surface of the lower end of the filter cartridge body is provided with a positioning ring groove for the sealing ring, the sealing ring portion protrudes from the positioning ring groove, and elastically abuts against the inner circumference of the first cover edge surface.
  • the filter element comprises a plurality of the current limiting covers, and the flow restricting ports of the plurality of current limiting covers are different in size, and the current limiting cover is selectively installed with the lower end of the filter body.
  • the upper end of the filter cartridge body is provided with a filter material mounting port
  • the filter cartridge further includes an upper cover that is disposed at the filter material mounting opening, and the upper cover is detachably connected to the upper end of the filter cartridge body;
  • the water inlet of the filter element is disposed on the upper cover.
  • the upper cover is engaged with the upper end of the filter cartridge body.
  • the upper cover has a second cover edge sleeved on the upper end of the filter cartridge body, and one of the inner circumferential surface of the second cover edge and the outer circumferential surface of the upper end of the filter cartridge body is provided with a screwing convex The other one is provided with a screwing card position that is screwed into the screwing boss.
  • the invention also provides a gravity water purifier, comprising a raw water tank, a clean water tank and a filter core, wherein the clean water tank is disposed under the raw water tank, an upper end of the filter core is located in the raw water tank, and the filter core is a lower end is located in the clean water tank, and the raw water tank is connected to the clean water tank through the filter element;
  • the filter element comprises:
  • the filter body has a water outlet at the lower end
  • a current limiting cover is disposed at a lower end of the filter body and is disposed at the water outlet, and the current limiting cover is provided with a current limiting port that communicates with the water outlet; the current limiting port is smaller than the current limiting port Outlet.
  • a current limiting cover is added to the filter core, and the current limiting opening of the current limiting cover is smaller than the water outlet of the filter core body, so as to reduce the water discharge speed of the filter element through the smaller current limiting port, thereby prolonging the raw water and the filter body
  • the contact time of the inner filter material makes the raw water and the filter material fully contact, thereby improving the filtering effect of the filter element, so that the user can obtain cleaner water purification through the gravity water purifier.
  • FIG. 1 is a schematic structural view of an embodiment of a gravity water purifier according to the present invention.
  • FIG. 2 is a schematic cross-sectional view of the gravity water purifier of FIG. 1 along the S-S direction;
  • Figure 3 is an enlarged schematic view of A in Figure 2;
  • Figure 4 is an enlarged schematic view of the portion B of Figure 2.
  • 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 filter element and a gravity water purifier having the filter element.
  • the gravity water purifier includes a raw water tank 2, a clean water tank 3, and a filter element 1.
  • the water purification tank 3 is disposed below the original water tank 2, the upper end of the filter element 1 is located in the original water tank 2, the lower end of the filter element 1 is located in the clean water tank 3, and the raw water tank 2 is connected to the clean water tank 3 through the filter element 1, thus, The raw water in the raw water tank 2 is filtered by the filter element 1 to become purified water by gravity, and then flows into the clean water tank 3.
  • the filter element 1 used in the gravity water purifier comprises:
  • a filter body 11 having a water outlet 111 at a lower end thereof;
  • the restrictor cover 12 is mounted on the lower end of the filter body 11 and is disposed on the water outlet 111.
  • the restrictor cover 12 is provided with a flow restricting opening 120 communicating with the water outlet 111.
  • the restrictor opening 120 of the current limiting cover 12 is smaller than the water outlet 111 of the filter body 11 to reduce the water discharge speed of the filter element 1 through the smaller restrictor opening 120, thereby extending the raw water and the filter body 11
  • the contact time of the inner filter material makes the raw water and the filter material fully contact, thereby improving the filtering effect of the filter element 1, so that the user can obtain cleaner water purification through the gravity water purifier.
  • the current limiting cover 12 is detachably connected to the lower end of the filter body 11 to facilitate the disassembly and replacement of the current limiting cover 12.
  • the current limiting cover 12 is engaged with the lower end of the filter element body 11.
  • the current limiting cover 12 includes a first cover 121 that covers the water outlet 111, and a first cover edge 122 that extends upward from the periphery of the first cover 121.
  • the current limiting port 120 is disposed on the first cover 121.
  • the first cover is disposed on the lower end of the filter body 11 , and the inner cover of the first cover 122 is provided with an annular slot 123 .
  • the outer peripheral surface of the lower end of the filter body 11 is disposed to fit the annular slot 123 .
  • the annular ring rib 112 is buckled.
  • the restrictor cover 12 and the filter body 11 can be fixed by the engagement of the annular card slot 123 and the annular rib 112.
  • the present design is not limited thereto.
  • the positions of the annular card slot and the annular rib are interchangeable, that is, the annular card slot is disposed on the outer peripheral surface of the lower end of the filter body 11, and the annular rib is correspondingly disposed.
  • the annular card slot is disposed on the outer peripheral surface of the lower end of the filter body 11, and the annular rib is correspondingly disposed.
  • the current limiting action of the restrictor opening 120 is weakened, and further A seal ring 14 is provided between the inner peripheral surface of the first cover edge 122 and the outer peripheral surface of the lower end of the filter element body 11.
  • the outer peripheral surface of the lower end of the filter body 11 is provided with a positioning ring groove 113 for setting the sealing ring 14 sleeve. Without loss of generality, the seal ring 14 partially protrudes from the positioning ring groove 113 and elastically abuts against the inner circumferential surface of the first cover edge 122.
  • the upper end of the filter body 11 is provided with a filter material mounting opening 114.
  • the filter element 1 further includes an upper cover 13 covering the filter material mounting opening 114.
  • the upper cover 13 and the filter element The upper end of the body 11 is detachably connected. Therefore, the upper cover 13 can be detached from the upper end of the filter body 11 to replace the filter material in the filter body 11 through the filter material mounting opening 114, thereby improving the convenience of the filter material replacement.
  • the water inlet of the filter element 1 is disposed on the upper cover 13; without loss of generality, the water inlet of the filter element 1 is present in the upper cover 13 in the form of a plurality of water inlet holes.
  • the upper cover 13 is engaged with the upper end of the filter body 11. It can be understood that the connection method of the card connection does not require the use of additional tools, and the assembly process is simpler than that of the connection by the screw.
  • the upper cover 13 includes a second cover 131 that covers the filter mounting opening 114, and a second cover 132 that extends downward from the periphery of the second cover 131. .
  • the water inlet hole is disposed on the second cover body 131.
  • the second cover is sleeved on the upper end of the filter body 11 , and the second cover is provided with a screwing boss 133 along the inner circumferential surface of the 132 .
  • the outer peripheral surface of the upper end of the filter body 11 is arranged to rotate with the screw boss 133 .
  • the snap-in card slot 115 is engaged, and thus, the upper cover 13 and the cartridge body 11 can be fixed by the rotation of the screwing boss 133 and the screw-in latching position 115.
  • the present design is not limited thereto.
  • the positions of the screwing boss and the screwing card are interchangeable, that is, the screwing boss is disposed on the outer peripheral surface of the upper end of the filter body 11, and is screwed.
  • the card position is correspondingly disposed on the inner circumferential surface of the second cover edge 132.
  • the screw-in card slot 115 includes an introduction section that communicates with the upper end surface of the cartridge body 11, and an outer peripheral surface that is disposed at the upper end of the cartridge body 11 and extends in the circumferential direction. a lead segment, the lead-in segment is in communication with one end of the limit segment, the screwing boss 133 can enter the limit segment from the lead-in segment, and after rotating the upper cover 13, enter the limit The end of the bit segment is away from the leading end.
  • the upper cover 13 in order to facilitate the rotation engagement between the upper cover 13 and the upper end of the filter element body 11, the upper cover 13 is preferably provided with a knob portion 134 protruding upward (see FIG. 2); obviously, the knob The portion 134 can facilitate the user to grasp and rotate the upper cover 13.
  • the filter element 1 can be configured with a plurality of current limiting covers 12, the size limits of the plurality of current limiting covers 12 are different, and the lower end of the filter body 11 can be combined with the plurality of Any one of the restriction caps 12 is connected and installed; it can be understood that the restriction caps 12 of different sizes of the restriction openings 120 have different restrictions on the water discharge speed of the filter element 1 and can be adjusted according to actual needs (for example, the filter media in the filter body 11 is different). Different filtering effects, etc.)
  • the current limiting cover 12 of the required size specification restricting port 120 is selected for configuration.
  • the diameter of the restricting port 120 ranges from 2.5 mm to 5 mm. It should be noted that the restricting port 120 is not limited to a round port, for example, when the restricting port 120 is a square port or a profiled shape.
  • the mouth diameter refers to the equivalent diameter; it can be understood that if the restriction port 120 is too large, the current limiting effect is weak. If the restriction port 120 is too small, the water discharge speed is difficult to meet the user's water demand.
  • the filter medium in the filter body 11 is a combination of 100 g of activated carbon and 100 g of ion exchange resin, a current limiting opening 120 of 2.5 mm is usually disposed, so that the residual chlorine removal rate is greater than 75.
  • the hardness removal rate is greater than 50% of the filtration effect; and when the filter material in the filter body 11 is 200 g of activated carbon, the current limiting port 120 is usually configured with a 3.5 mm restriction cap 12, so that the residual chlorine removal rate is greater than 90% of the filtration effect; when the filter material in the filter body 11 is a combination of 150g activated carbon and 100g of maifan stone, the current limiting cover 12 of the limiting orifice 1205mm is usually arranged, so that the residual chlorine removal rate is greater than 50%. Filter effect.

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  • Chemical & Material Sciences (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)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Abstract

一种滤芯（1）和具有该滤芯（1）的重力净水器，其中，滤芯（1）包括：滤芯本体（11），下端设有出水口（111）；限流盖（12），安装于滤芯本体（11）的下端，并盖设于出水口（111），且限流盖（12）设有与出水口（111）相连通的限流口（120），限流口（120）小于出水口（111）。

Description

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。由于常见滤芯的出水口较大，滤芯的出水速度较高，原水会快速通过滤芯，导致原水与滤芯内滤材的接触时间较短，过滤效果较差。
发明内容
本发明的主要目的是提出一种滤芯，旨在降低滤芯的出水速度，从而延长水与滤芯内滤材的接触时间，进而提高该滤芯的过滤效果。
为实现上述目的，本发明提出的滤芯用于重力净水器，所述滤芯包括：
滤芯本体，下端设有出水口；以及
限流盖，安装于所述滤芯本体的下端，并盖设于所述出水口，且所述限流盖设有与所述出水口相连通的限流口；所述限流口小于所述出水口。
优选地，所述限流口的口径范围为2.5毫米~5毫米。
优选地，所述限流盖与所述滤芯本体的下端可拆卸连接。
优选地，所述限流盖与所述滤芯本体的下端卡接。
优选地，所述限流盖具有套设于所述滤芯本体下端的第一盖沿，所述第一盖沿的内周面和所述滤芯本体下端的外周面的其中一者设有环形卡槽，另一者设有与所述环形卡槽相适配嵌扣的环形卡筋。
优选地，所述限流盖具有套设于所述滤芯本体下端的第一盖沿，所述第一盖沿与所述滤芯本体下端之间设有密封圈。
优选地，所述滤芯本体下端的外周面设有供所述密封圈套设的定位环槽，所述密封圈部分突出于所述定位环槽，且弹性抵触于所述第一盖沿的内周面。
优选地，所述滤芯包括多个所述限流盖，多个所述限流盖的限流口大小不相同，择一所述限流盖与所述滤芯本体的下端安装。
优选地，所述滤芯本体的上端设有滤材安装口，所述滤芯还包括盖设于所述滤材安装口的上盖，所述上盖与所述滤芯本体的上端可拆卸连接；所述滤芯的进水口设于所述上盖。
优选地，所述上盖与所述滤芯本体的上端卡接。
优选地，所述上盖具有套设于所述滤芯本体上端的第二盖沿，所述第二盖沿的内周面和所述滤芯本体上端的外周面的其中一者设有旋接凸台，另一者设有与所述旋接凸台相旋接卡合的旋接卡位。
本发明还提出一种重力净水器，包括原水箱、净水箱以及滤芯，所述净水箱设于所述原水箱下方，所述滤芯的上端位于所述原水箱内，所述滤芯的下端位于所述净水箱内，且所述原水箱通过所述滤芯与所述净水箱连通；所述滤芯包括：
滤芯本体，下端设有出水口；以及
限流盖，安装于所述滤芯本体的下端，并盖设于所述出水口，且所述限流盖设有与所述出水口相连通的限流口；所述限流口小于所述出水口。
本发明的技术方案中，滤芯上增设有限流盖，该限流盖的限流口小于滤芯本体的出水口，以通过该较小的限流口降低滤芯的出水速度，从而延长原水与滤芯本体内滤材的接触时间，使原水与滤材充分接触，进而提高该滤芯的过滤效果，使用户可通过该重力净水器获得更为干净的净水。
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；
图3为图2中A处的放大示意图；
图4为图2中B处的放大示意图。
附图标号说明：
标号 名称 标号 名称
1 滤芯 11 滤芯本体
12 限流盖 13 上盖
14 密封圈 111 出水口
112 环形卡筋 113 定位环槽
114 滤材安装口 115 旋接卡位
120 限流口 121 第一盖体
122 第一盖沿 123 环形卡槽
131 第二盖体 132 第二盖沿
133 旋接凸台 134 旋手部
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。
本发明提出一种滤芯、以及一种具有该滤芯的重力净水器。
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以及滤芯1。其中，净水箱3设于原水箱2下方，滤芯1的上端位于原水箱2内，滤芯1的下端位于净水箱3内，且原水箱2通过滤芯1与净水箱3连通，如此，原水箱2内的原水在重力的作用下，经滤芯1过滤而变成净水后，流入净水箱3中。
本实施例中，该重力净水器所采用的滤芯1包括：
滤芯本体11，下端设有出水口111；以及
限流盖12，安装于滤芯本体11的下端，并盖设于出水口111，且该限流盖12设有与出水口111相连通的限流口120。
可以理解，本实施例中，限流盖12的限流口120小于滤芯本体11的出水口111，以通过该较小的限流口120降低滤芯1的出水速度，从而延长原水与滤芯本体11内滤材的接触时间，使原水与滤材充分接触，进而提高该滤芯1的过滤效果，使用户可通过该重力净水器获得更为干净的净水。
进一步地，限流盖12与滤芯本体11的下端可拆卸连接，以方便限流盖12的拆装更换。本实施例中，具体地，限流盖12与滤芯本体11的下端卡接，可以理解，相较于通过螺钉锁附的连接方式，卡接的连接方式无需使用额外工具，装配过程更为简便。
一并参照图3，在本实施例中，限流盖12包括盖合所述出水口111的第一盖体121、以及自第一盖体121的周缘朝上延伸的第一盖沿122。其中，所述限流口120设在该第一盖体121上。第一盖沿122套设于滤芯本体11的下端，且第一盖沿122的内周面设有环形卡槽123，滤芯本体11下端的外周面则设有与环形卡槽123相适配嵌扣的环形卡筋112，如此，限流盖12与滤芯本体11可通过环形卡槽123和环形卡筋112的配合卡接，而实现固定。然本设计不限于此，于其他实施例中，环形卡槽和环形卡筋的位置可互换，即是说，环形卡槽设置在滤芯本体11下端的外周面上，而环形卡筋对应设置在第一盖沿122的内周面上。
在本实施例中，为避免水从第一盖沿122的内周面与滤芯本体11下端的外周面之间流入净水箱3，而减弱所述限流口120的限流作用，进一步地，第一盖沿122的内周面与滤芯本体11下端的外周面之间设有密封圈14。优选地，滤芯本体11下端的外周面设有定位环槽113，该定位环槽113用以供密封圈14套设定位。不失一般性，密封圈14部分突出于定位环槽113，且弹性抵触于第一盖沿122的内周面。
参照图2，在本实施例中，进一步地，滤芯本体11的上端设有滤材安装口114，该滤芯1还包括盖设于滤材安装口114的上盖13，该上盖13与滤芯本体11的上端可拆卸连接，如此，只需要将上盖13从滤芯本体11的上端拆卸下，即可通过滤材安装口114更换滤芯本体11内的滤材，提高了滤材更换的便利性。可以理解，本实施例中，滤芯1的进水口设于上盖13；不失一般性，该滤芯1的进水口在上盖13上是以多个进水孔的形式存在的。
本实施例中，具体地，上盖13与滤芯本体11的上端卡接，可以理解，相较于通过螺钉锁附的连接方式，卡接的连接方式无需使用额外工具，装配过程更为简便。
一并参照图4，在本实施例中，上盖13包括盖合所述滤材安装口114的第二盖体131、以及自第二盖体131的周缘朝下延伸的第二盖沿132。其中，所述进水孔设在该第二盖体131上。第二盖沿132套设于滤芯本体11的上端，且第二盖沿132的内周面设有旋接凸台133，滤芯本体11上端的外周面则设有与旋接凸台133相旋接卡合的旋接卡位115，如此，上盖13与滤芯本体11可通过旋接凸台133和旋接卡位115的旋转卡合，而实现固定。然本设计不限于此，于其他实施例中，旋接凸台和旋接卡位的位置可互换，即是说，旋接凸台设置在滤芯本体11上端的外周面上，而旋接卡位对应设置在第二盖沿132的内周面上。
不失一般性，本实施例中，所述旋接卡位115包括连通所述滤芯本体11的上端面的导入段、以及设于所述滤芯本体11上端的外周面且沿周向延伸的限位段，所述导入段与所述限位段的一端相连通，所述旋接凸台133可自所述导入段进入所述限位段，并在旋转上盖13后，进入所述限位段的远离所述导入段的一端。
另外，本实施例中，为方便上盖13与滤芯本体11上端之间的旋转卡合，上盖13优选设有朝上凸设的旋手部134（见图2）；显然，该旋手部134可方便用户对上盖13进行抓取旋转。
在本实施例中，进一步地，该滤芯1可配置有多个限流盖12，该多个限流盖12的限流口120的大小规格不相同，滤芯本体11的下端可与该多个限流盖12中的任意一个连接安装；可以理解，限流口120大小不同的限流盖12对滤芯1出水速度的限制不同，用户可根据实际需要（例如滤芯本体11内滤材的不同、不同的过滤效果等）选择所需大小规格限流口120的限流盖12进行配置。
本实施例中，优选地，限流口120的口径范围为2.5毫米~5毫米，需要说明的是，这里并不限定限流口120为圆口，例如，当限流口120为方口或异形口时，其口径是指等效口径；可以理解，若限流口120过大，限流作用很弱，若限流口120过小，出水速度难以满足用户用水需求。
不失一般性，当滤芯本体11内的滤材为100g活性炭和100g离子交换树脂的组合时，通常配置限流口120为2.5mm的限流盖12，如此，可达到余氯去除率大于75%，硬度去除率大于50%的过滤效果；而当滤芯本体11内的滤材为200g活性炭时，通常配置限流口120为3.5mm的限流盖12，如此，可达到余氯去除率大于90%的过滤效果；而当滤芯本体11内的滤材为150g活性炭和100g麦饭石的组合时，通常配置限流口1205mm的限流盖12，如此，可达到余氯去除率大于50%的过滤效果。
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 (12)

  1. 一种滤芯，用于重力净水器，其特征在于，所述滤芯包括：
    滤芯本体，下端设有出水口；以及
    限流盖，安装于所述滤芯本体的下端，并盖设于所述出水口，且所述限流盖设有与所述出水口相连通的限流口；所述限流口小于所述出水口。
  2. 如权利要求1所述的滤芯，其特征在于，所述限流口的口径范围为2.5毫米~5毫米。
  3. 如权利要求1所述的滤芯，其特征在于，所述限流盖与所述滤芯本体的下端可拆卸连接。
  4. 如权利要求3所述的滤芯，其特征在于，所述限流盖与所述滤芯本体的下端卡接。
  5. 如权利要求4所述的滤芯，其特征在于，所述限流盖具有套设于所述滤芯本体下端的第一盖沿，所述第一盖沿的内周面和所述滤芯本体下端的外周面的其中一者设有环形卡槽，另一者设有与所述环形卡槽相适配嵌扣的环形卡筋。
  6. 如权利要求3所述的滤芯，其特征在于，所述限流盖具有套设于所述滤芯本体下端的第一盖沿，所述第一盖沿与所述滤芯本体下端之间设有密封圈。
  7. 如权利要求6所述的滤芯，其特征在于，所述滤芯本体下端的外周面设有供所述密封圈套设的定位环槽，所述密封圈部分突出于所述定位环槽，且弹性抵触于所述第一盖沿的内周面。
  8. 如权利要求3所述的滤芯，其特征在于，所述滤芯包括多个所述限流盖，多个所述限流盖的限流口大小不相同，择一所述限流盖与所述滤芯本体的下端安装。
  9. 如权利要求1所述的滤芯，其特征在于，所述滤芯本体的上端设有滤材安装口，所述滤芯还包括盖设于所述滤材安装口的上盖，所述上盖与所述滤芯本体的上端可拆卸连接；所述滤芯的进水口设于所述上盖。
  10. 如权利要求9所述的滤芯，其特征在于，所述上盖与所述滤芯本体的上端卡接。
  11. 如权利要求10所述的滤芯，其特征在于，所述上盖具有套设于所述滤芯本体上端的第二盖沿，所述第二盖沿的内周面和所述滤芯本体上端的外周面的其中一者设有旋接凸台，另一者设有与所述旋接凸台相旋接卡合的旋接卡位。
  12. 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11任一项所述的滤芯，所述净水箱设于所述原水箱下方，所述滤芯的上端位于所述原水箱内，所述滤芯的下端位于所述净水箱内，且所述原水箱通过所述滤芯与所述净水箱连通。
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