KR100493694B1 - Micro Channel Heat Exchanger - Google Patents

Micro Channel Heat Exchanger Download PDF

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Publication number
KR100493694B1
KR100493694B1 KR10-2002-0078584A KR20020078584A KR100493694B1 KR 100493694 B1 KR100493694 B1 KR 100493694B1 KR 20020078584 A KR20020078584 A KR 20020078584A KR 100493694 B1 KR100493694 B1 KR 100493694B1
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South Korea
Prior art keywords
header
heat exchanger
refrigerant
tube
flow
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KR10-2002-0078584A
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Korean (ko)
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KR20040051642A (en
Inventor
오세기
오세윤
고철수
사용철
장동연
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엘지전자 주식회사
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Priority to KR10-2002-0078584A priority Critical patent/KR100493694B1/en
Publication of KR20040051642A publication Critical patent/KR20040051642A/en
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Publication of KR100493694B1 publication Critical patent/KR100493694B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0282—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry of conduit ends, e.g. by using inserts or attachments for modifying the pattern of flow at the conduit inlet or outlet

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

본 발명에 따른 튜브 삽입깊이를 달리한 마이크로채널 열교환기는, 마이크로채널 열교환기에 있어서 유체의 건도에 따라 조절하여 냉매분배를 조절하도록 하는 헤더내의 튜브삽입 구조에 관한 것으로서, 본 발명에 따른 튜브 삽입깊이를 달리한 마이크로채널 열교환기는, 중공이 형성되어 냉매가 흐르는 헤더와; 상기 헤더에 깊이를 달리하여 삽입되어 상기 헤더내에 흐르는 냉매가 분배되도록 하는 다수개의 냉매관과; 상기 헤더내의 상기 냉매관 사이에 구비되는 격벽으로 이루어 진 것을 특징으로 한다.The microchannel heat exchanger having a different tube insertion depth according to the present invention relates to a tube insertion structure in a header for controlling refrigerant distribution by adjusting according to the dryness of a fluid in a microchannel heat exchanger. Another microchannel heat exchanger includes a header in which a hollow is formed and a refrigerant flows therein; A plurality of refrigerant pipes inserted into the header at different depths to distribute the refrigerant flowing in the header; Characterized in that the barrier rib provided between the refrigerant pipe in the header.

본 발명에 따른 튜브 삽입깊이를 달리한 마이크로채널 열교환기는, 헤더에 삽입된 튜브의 깊이의 조절에 의하여 열교환기내 유체의 건도에 따라 균일하게 냉매가 흐르도록 하는 효과가 있다.The microchannel heat exchanger having a different tube insertion depth according to the present invention has the effect of allowing the refrigerant to flow uniformly according to the dryness of the fluid in the heat exchanger by controlling the depth of the tube inserted into the header.

본 발명에 따른 또 다른 효과는 열교환기의 효율을 극대화할 수 있는 효과가 있다.Another effect according to the invention has the effect of maximizing the efficiency of the heat exchanger.

Description

튜브 삽입깊이를 달리한 마이크로채널 열교환기{Micro Channel Heat Exchanger}Micro Channel Heat Exchanger with Different Tube Insertion Depths

본 발명은 마이크로채널 열교환기에 있어서 유체의 건도에 따라 조절하여 냉매분배를 조절하도록 하는 헤더내의 튜브삽입 구조에 관한 것으로서, 일반적으로 열교환기는 실내의 온도를 높이거나 낯추는 냉방기 및 난방기의 공기조화기에 사용된다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube insertion structure in a header for controlling refrigerant distribution by controlling according to the dryness of a fluid in a microchannel heat exchanger. In general, a heat exchanger is used for an air conditioner of a cooler and a heater to raise or lower a room temperature. do.

도 1은 열교환기의 외형을 간략히 나타낸 사시도이고, 도 2는 열교환기의 구성요소의 결합관계를 나타내는 분해도이며, 도 3은 도 2에 있어서 튜브의 단면을 나타내는 도면이다.FIG. 1 is a perspective view briefly illustrating an external shape of a heat exchanger, FIG. 2 is an exploded view showing a coupling relationship between components of a heat exchanger, and FIG. 3 is a view showing a cross section of a tube in FIG.

이들 도면을 참조하면, 종래 열교환기는 하부헤더(1)의 상부에 대응되도록 위치하는 상부헤더(2)와, 상기 상부헤더(2)와 하부헤더(1) 사이에 위치하는 다수개의 튜브(3)와, 상기 각 튜브(3) 사이에 설치되는 핀(6)으로 구성된다. 상기 하부 헤더(1)는 원통형으로 형성되어 내부에 중공이 형성되고, 그 외형을 이루는 외주부의 일측부에는 튜브(3)를 삽입하여 고정하도록 다수개의 헤더홀(4)이 하부헤더(1)의 길이방향을 따라 등간격으로 형성되어 있다.Referring to these drawings, a conventional heat exchanger includes an upper header 2 positioned to correspond to an upper portion of a lower header 1, and a plurality of tubes 3 positioned between the upper header 2 and the lower header 1. And a pin 6 provided between the respective tubes 3. The lower header 1 is formed in a cylindrical shape and a hollow is formed therein, and a plurality of header holes 4 are inserted into and fixed to one side of the outer circumferential portion constituting the outer shape of the lower header 1. It is formed at equal intervals along the longitudinal direction.

여기서, 상기 하부헤더(1)와 대응되도록 상부에 위치하는 상부헤더(2)는 상기 하부헤더(1)와 동일한 형상을 갖는다. 상기 각 튜브(3)는 각 헤더홀(4)에 튜브(3)의 길이방향으로 양단부가 고정되어 헤더(1,2)의 길이방향으로 나란하게 배열된다.Here, the upper header (2) located in the upper portion so as to correspond to the lower header (1) has the same shape as the lower header (1). Each tube 3 is fixed to both header holes 4 in the longitudinal direction of the tube 3, and arranged side by side in the longitudinal direction of the header (1, 2).

한편, 유동공기는 두 헤더(1,2)의 길이방향의 축을 잇는 면을 향해 일정한 경사를 가지도록 유동하여 각 튜브(3)와 두 헤더(1,2) 사이를 통과한다. 상기 튜브(3)는 두 헤더(1,2)에 고정된 양끝단부 사이의 거리인 길이와, 유동공기의 방향에 수직한 거리인 두께를 갖고,유동공기의 흐름방향과 평행한 거리인 폭을 갖는다. 상기 튜브(3)는 두 헤더(1,2)에 수용될 수 있는 정도의 폭과 얇은 두께를 갖는 직사각형 형상의 판형으로서, 내부에는 중공인 다수개의 채널(5)이 형성되어 있다. On the other hand, the flow air flows so as to have a constant inclination toward the plane connecting the longitudinal axes of the two headers 1, 2 and passes between each tube 3 and the two headers (1, 2). The tube 3 has a length that is a distance between both ends fixed to the two headers 1 and 2 and a thickness that is a distance perpendicular to the direction of the flow air, and a width that is a distance parallel to the flow direction of the flow air. Have The tube 3 is a rectangular plate having a width and a thin thickness that can be accommodated in the two headers 1 and 2, and a plurality of hollow channels 5 are formed therein.

또한, 상기 각 튜브(3)의 폭이 유동공기의 흐름방향에 평행하도록 각 튜브(3)가 두 헤더(1,2)에 고정되고, 튜브(3)의 길이방향에 대해 수직하도록 미세한 단면적을 가짐과 함께 튜브(3)의 길이방향으로 길게 형성되는 다수개의 채널(5)은 유동공기의 흐름방향을 따라 순차적으로 배열되도록 형성된다.Further, each tube 3 is fixed to the two headers 1 and 2 so that the width of each tube 3 is parallel to the flow direction of the flow air, and the fine cross-sectional area is perpendicular to the longitudinal direction of the tube 3. In addition, the plurality of channels 5 which are formed long in the longitudinal direction of the tube 3 are formed to be sequentially arranged along the flow direction of the flow air.

이와 같이 형성된 튜브(3)는 두 헤더(1,2)에 양끝단부가 고정되어 헤더(1,2)에 형성된 중공과 연통되어 있고, 상기 각 튜브(3) 사이에는 유동공기가 통과할 수 있는 공간을 형성하도록 각 핀(6)이 설치된다. 즉, 각 핀(6)은 얇은 두께를 가진 판형으로서 여러번 지그재그로 절곡되어 각 튜브(4) 사이에 설치된다. 상기 핀(6)은 여러 가지 형상을 가지며 고정될 수 있지만, 일반적으로 유동공기의 흐름저항이 최소화 되도록 공간을 형성하는 것이 바람직하다.The tube 3 formed as described above is fixed at both ends of the two headers 1 and 2 so as to communicate with a hollow formed in the headers 1 and 2, and flow air can pass between the tubes 3. Each pin 6 is provided to form a space. That is, each pin 6 is a plate-shaped with a thin thickness, bent in a zigzag several times and installed between each tube (4). The fins 6 may have various shapes and may be fixed, but it is generally desirable to form a space to minimize flow resistance of the flow air.

도 4는 종래 기술에 따른 튜브가 헤드내에 삽입된 상태를 나타내는 측단면도이다.Figure 4 is a side cross-sectional view showing a state in which the tube according to the prior art is inserted into the head.

도 4에 따르면, 다수개의 튜브(3)들은 다수개의 튜브군(群)으로 구분되어 상기 각각의 튜브군을 기본 단위로 하여 각 튜브군의 전후에는 교번하여 하부 헤더 (1)와 상부 헤더(2)로의 냉매의 흐르는 방향을 변경시키기 위한 격벽이 설치 되는데, 즉, 첫번째 튜브군의 하측방향의 끝지점에 첫번째 격벽이 설치되고, 두번째 튜브군의 상측방향 끝지점에 두번째 격벽이 설치되며, 세번째 튜브군의 하측방향의 끝지점에 세번째 격벽이 설치되고, 네번째 튜브군의 상측방향 끝지점에 네번째 격벽이 설치된다.According to FIG. 4, the plurality of tubes 3 are divided into a plurality of tube groups, and the lower header 1 and the upper header 2 are alternately arranged before and after each tube group with each tube group as a basic unit. The bulkhead is installed to change the flow direction of the refrigerant to the bottom, that is, the first bulkhead is installed at the lower end of the first tube group, the second bulkhead is installed at the upper end of the second tube group, the third tube The third partition is installed at the lower end of the group, and the fourth partition is installed at the upper end of the fourth tube group.

이와 같은 격벽구조를 갖는 열교환기에 있어서, 처음 하부 헤더(1)로 유입된 냉매는 첫번째 튜브군을 통하여 상승하고, 상승된 냉매는 상부 헤더(2)를 따라서 수평으로 이동하다가, 두번째 격벽에 의하여 간섭되어 두번째 튜브군을 타고 하측 방향으로 하강하게 된다. 이후에도 이와같은 방식으로 튜브군을 타고 상승과 하강을 반복하게 된다. 그리고 이렇게 튜브(3)를 따라 이동하는 과장에서 상기 튜브(3)에 고정된 핀(6)으로 열 전달이 이루어 지고, 최종적으로는 상기 핀(6)의 표면을 통하여 유동공기와 열교환이 효율적으로 이루어지게 된다.In the heat exchanger having such a partition structure, the refrigerant introduced into the lower header 1 first rises through the first tube group, and the elevated refrigerant moves horizontally along the upper header 2 and interferes with the second partition wall. As a result, the second tube group descends downward. After this, the tube group is repeated in the same way ascending and descending. And heat transfer is made to the fins 6 fixed to the tube 3 in the exaggerated movement along the tube 3, and finally, the flow air and heat exchange efficiently through the surface of the fin 6 Will be done.

일반적으로 마이크로 채널 열교환기를 증발기로 사용하는 경우, 헤더(1,2)내로는 기체와 액체의 혼합류가 유입되는데, 헤더내를 흐르는 기액 이상류(two phase flow)는 건도가 낮은 경우에는 유동의 모멘텀이 작아서 헤더의 입구 영역으로 액이 집중되고, 건도가 큰 경우에는 유동의 모멘텀이 커서 액체가 유동 하류부에 집중되게 된다. 그리고, 튜브의 삽입 깊이를 동일하게 하면서 얕게 하면 유동이 튜브에 영향을 받지 아니하므로 유동 상류부에 집중되고, 반대로 튜브의 삽입 깊이를 동일하게 하면서 깊게 하면 헤더에서의 재순환과 혼합에 의하여 유동 하류까지 액상이 이동하게 된다.In general, when a microchannel heat exchanger is used as an evaporator, a mixed flow of gas and liquid is introduced into the headers 1 and 2, and the gas phase two-phase flow flowing in the header is low in dryness. The momentum is small so that the liquid is concentrated in the inlet area of the header, and when the dryness is large, the momentum of the flow is large so that the liquid is concentrated in the downstream flow. If the depth of the tube is the same and the depth is shallow, the flow is not influenced by the tube, so that the flow is concentrated upstream. The liquid phase moves.

따라서, 종래와 같은 열교환기에 있어서는 헤더(1, 2)내에 삽입되는 튜브의 깊이(A, A', A")가 모두 동일한 구조를 갖는데, 이와 같은 구조를 갖는 종래의 열교환기에 있어서는, 기액이 균일하게 분지되지 못하므로 증발기의 효율이 저하되는 문제점이 있다.Therefore, in the conventional heat exchanger, the depths A, A 'and A "of the tubes inserted into the headers 1 and 2 all have the same structure. In the conventional heat exchanger having such a structure, the gas liquid is uniform. There is a problem that the efficiency of the evaporator is lowered because it is not branched.

본 발명은 이러한 문제점을 감안하여 창출된 것으로서, 상기 헤더내에 흐르는 냉매가 고르게 분배되도록 다수개의 냉매관을 구비하므로써, 열교환기의 효율을획기적으로 증대시키는데 그 목적이 있다. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to dramatically increase the efficiency of a heat exchanger by providing a plurality of refrigerant pipes so that the refrigerant flowing in the header is evenly distributed.

본 발명에 따른 튜브 삽입깊이를 달리한 마이크로채널 열교환기는, 중공이 형성되어 냉매가 흐르는 헤더와; 상기 헤더에 깊이를 달리하여 삽입되어 상기 헤더내에 흐르는 냉매가 분배되도록 하는 다수개의 냉매관과; 상기 헤더내의 상기 냉매관 사이에 구비되는 격벽으로 이루어 진 것을 특징으로 한다.Microchannel heat exchanger having a different tube insertion depth according to the present invention, the hollow is formed and the header flows through the refrigerant; A plurality of refrigerant pipes inserted into the header at different depths to distribute the refrigerant flowing in the header; Characterized in that the barrier rib provided between the refrigerant pipe in the header.

도 5는 본 발명에 따른 튜브의 삽입깊이를 달리한 상태를 나타내는 측단면도이다.Figure 5 is a side cross-sectional view showing a state in which the insertion depth of the tube in accordance with the present invention.

도 5를 참조하면, 튜브의 삽입깊이(B, B', B")를 달리하되, 상기 냉매관은 해더내의 유동 상류에서는 삽입 깊이(B)가 깊고, 냉매 유동 진행 방향을 따라 삽입 깊이가 점차(B', B")얕게 되도록 하였다. Referring to Figure 5, the insertion depth (B, B ', B ") of the tube is varied, the refrigerant pipe has a deep insertion depth (B) upstream of the flow in the header, the insertion depth gradually increases along the refrigerant flow direction (B ', B ") were made shallow.

즉 B, B', B"들간의 관계에 있어서는, B < B' < B"의 관계식이 성립된다.That is, in the relationship between B, B ', and B ", the relational expression of B <B' <B" is established.

본 발명에서와 같이 격판에 의하여 냉매의 유동 방향이 상/하로 반복을 하여 변경하는 유로에 있어서는, 이러한 상/하로 반복하여 이동하는 과정에 의하여 냉매는 증발하게 되는데, 유동 특성상 유동상류로 액이 집중하게 되는 상류 영역에 있어서는 삽입 깊이를 깊게하여 유속이 느림에 대하여 보정하고, 액이 하류로 집중하는 하류 영역에서는 삽입 깊이를 얕게하여 유속이 빠름에 대하여 보정토록 하므로써 기액이 균일하게 분지되도록 한다.In the flow path in which the flow direction of the refrigerant is repeatedly changed up and down by the diaphragm as in the present invention, the refrigerant is evaporated by the process of repeatedly moving up and down. In the upstream region, the insertion depth is deepened to compensate for the slow flow rate, and in the downstream region in which the liquid concentrates downstream, the insertion depth is shallower to correct for the faster flow rate so that the gas liquid is uniformly branched.

본 발명에 따른 튜브 삽입깊이를 달리한 마이크로채널 열교환기는, 헤더에 삽입된 튜브의 깊이의 조절에 의하여 열교환기내 유체의 건도에 따라 균일하게 냉매가 흐르도록 하는 효과가 있다.The microchannel heat exchanger having a different tube insertion depth according to the present invention has the effect of allowing the refrigerant to flow uniformly according to the dryness of the fluid in the heat exchanger by controlling the depth of the tube inserted into the header.

본 발명에 따른 또 다른 효과는 열교환기의 효율을 극대화할 수 있는 효과가 있다. Another effect according to the invention has the effect of maximizing the efficiency of the heat exchanger.

도 1은 열교환기의 외형을 간략히 나타낸 사시도.Figure 1 is a perspective view briefly showing the appearance of the heat exchanger.

도 2는 열교환기의 구성요소의 결합관계를 나타내는 분해도.Figure 2 is an exploded view showing the coupling relationship of the components of the heat exchanger.

도 3은 도 2에 있어서 튜브의 단면을 나타내는 도면.3 is a view showing a cross section of the tube in FIG.

도 4는 종래 기술에 따른 튜브가 헤드내에 삽입된 상태를 나타내는 측단면도.Figure 4 is a side cross-sectional view showing a state in which the tube according to the prior art is inserted into the head.

도 5는 본 발명에 따른 튜브의 삽입깊이를 달리한 상태를 나타내는 측단면도.Figure 5 is a side cross-sectional view showing a state in which the insertion depth of the tube in accordance with the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

1 : 하부헤더 2 : 상부헤더 3 : 튜브1: lower header 2: upper header 3: tube

4 : 헤더홀 5 : 채널 6 : 핀4: header hole 5: channel 6: pin

7 : 격벽7: bulkhead

Claims (3)

중공이 형성되어 냉매가 흐르는 제 1, 제 2 헤더; First and second headers in which a hollow is formed and through which a refrigerant flows; 상기 제 1, 제 2 헤더의 내부에 형성되어, 상기 헤더의 내부 공간이 다수 공간으로 분리되도록 하는 격벽;Barrier ribs formed in the first and second headers to separate the internal spaces of the headers into a plurality of spaces; 상기 제 1 헤더의 분리된 어느 한 공간과, 상기 제 2 헤더의 분리된 어느 한 공간을 연결하는 복수개의 냉매관이 포함되고, A plurality of refrigerant pipes connecting one separated space of the first header and one separated space of the second header, 상기 복수개의 냉매관은 인접하는 다른 복수개의 냉매관에 대하여 냉매가 대향되는 방향으로 유동하도록 다수개가 제공되고, The plurality of refrigerant pipes are provided in plurality so as to flow in a direction in which the refrigerant is opposed to a plurality of adjacent refrigerant pipes, 상기 복수개의 냉매관은, 냉매의 유동방향을 기준으로 상류측으로 갈수록 상기 헤더의 내부에 보다 깊게 삽입되는 것을 특징으로 하는 튜브 삽입깊이를 달리한 마이크로채널 열교환기.The plurality of refrigerant pipes, the microchannel heat exchanger having a different tube insertion depth, characterized in that the deeper inserted into the header toward the upstream side of the flow direction of the refrigerant. 제 1항에 있어서,The method of claim 1, 상기 헤더는 수평 형태의 헤더인 것을 특징으로 하는 튜브 삽입깊이를 달리한 마이크로채널 열교환기.The header of the microchannel heat exchanger having a different tube insertion depth, characterized in that the header of the horizontal form. 삭제delete
KR10-2002-0078584A 2002-12-11 2002-12-11 Micro Channel Heat Exchanger KR100493694B1 (en)

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CN104764255A (en) * 2015-03-26 2015-07-08 广东美的制冷设备有限公司 Parallel flow heat exchanger
EP3236189B1 (en) 2015-11-30 2019-01-09 Carrier Corporation Heat exchanger for residential hvac applications
CN113624043B (en) * 2021-08-06 2022-08-12 合肥工业大学 Temperature-equalizing distributed parallel micro-flow-channel heat exchanger and application thereof
CN115823639B (en) * 2022-12-05 2023-06-06 哈尔滨无双利能科技发展有限公司 Direct heating and indirect heating system based on boiler
KR20240141037A (en) 2023-03-16 2024-09-25 에스엔유 프리시젼 주식회사 Tube insert device for heat exchanger

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CN105627633A (en) * 2014-10-29 2016-06-01 杭州三花研究院有限公司 Heat exchanger
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US10907903B2 (en) 2016-01-21 2021-02-02 Samsung Electronics Co., Ltd. Air conditioner with flow direction changing mechanism

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