JP4186143B2 - Refrigerant shunt of air conditioner heat exchanger - Google Patents

Refrigerant shunt of air conditioner heat exchanger Download PDF

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JP4186143B2
JP4186143B2 JP21439899A JP21439899A JP4186143B2 JP 4186143 B2 JP4186143 B2 JP 4186143B2 JP 21439899 A JP21439899 A JP 21439899A JP 21439899 A JP21439899 A JP 21439899A JP 4186143 B2 JP4186143 B2 JP 4186143B2
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hole
refrigerant
block body
annular groove
holes
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JP2001041609A (en
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聖一 端
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T.RAD CO., L T D.
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、気液二相状態で流通する空調用熱交換器の冷媒を複数のパイプに分流する冷媒分流器に関する。
【０００２】
【従来の技術】
空調用熱交換器のうち室内機には、その冷媒流通路が複数並列されたものが存在する。その場合、冷媒配管から分流器を介して夫々の冷媒流路に冷媒が供給される。その分流器として従来、図６の如く形成された冷媒分流器が存在する。これは、冷媒の入口側が１本のパイプで出口側が２本のパイプに二股状に枝分かれするものである。そして流入側に一本のパイプが接続され、流出側に夫々の冷媒流路へ流通する２本のパイプが接続される。
また、図７に示すような分流器も提案されていた。これは筒状の外筒部材内に円柱状のブロック材が挿入されたものであり、そのブロック材の外周に複数の円弧断面を有する溝が形成されたものである。この分流器は部材コスト及び加工コストを低減するめたのものである。
【０００３】
【発明が解決しようとする課題】
分流器内には冷媒が気液二相状態で流通するため、その液相成分が重力や流速の影響を受け易く、各分配管に均等に分流しない欠点があった。そのため各冷媒流路には不均一に冷媒が流通し、分流器に起因し全体として熱交換器性能が低下するおそれがあった。
そこで本発明は、係る問題点を解決することを課題とする。
【０００４】
【課題を解決するための手段】
請求項１に記載の発明は、ブロック体５と、そのブロック体５の外周に被嵌される短管６と、を具備し、
前記ブロック体は、全体が短い円柱状に形成され、その軸線方向中央部の外周に浅い環状溝部１が形成されると共に、その軸線方向の一端面の中心から先端を内部に突き当てた第１孔２が軸線上に形成され、前記環状溝部１の外周から互いに同一の断面積の一対の枝孔３が中心側に挿通され、夫々の先端が前記第１孔２に連通され、その軸線方向他端面の縁部で且つ、前記環状溝部１における前記枝孔３の開口位置から周方向にずれた位置に、互いに同一の断面積の一対の第２孔４が形成され、その先端部が前記環状溝部１に連通された一体構成よりなり、
前記短管６は、前記ブロック体５の最大外直径に整合する内直径を有し、
前記環状溝部１は、その溝幅が溝深さより著しく大きく形成され、前記第１孔２と前記枝孔３とがＴ字状に交差し、一対の枝孔３がブロック体５の直径線上に配置され、夫々の枝孔３から周方向に９０°離れた位置に、一対の凹溝状の前記第２孔４が形成され、
前記第１孔２に第１の冷媒管７が液密に連通されると共に、夫々の第２孔４に第２の冷媒管８が夫々液密に連通され、
第１の冷媒管７よりブロック体５の第１孔２に流入する冷媒は、その第１孔２から一対の枝孔３に分流して短管６の内面に対向する開口に達し、各枝孔３の前記開口から 180 度逆方向に分流して、環状溝部１の外周と短管６内面との間を通り、各第２孔４に互いに逆方向からの冷媒が合流することを特徴とする空調用熱交換器の冷媒分流器である。
【０００６】
【発明の実施の形態】
次に、図面に基づいて本発明の実施の形態につき説明する。
図１は本発明の冷媒分流器の分解斜視図であり、図２はその組立て状態を示す斜視図である。図３はその冷媒流通説明図。図４（ａ）（ｂ）（ｃ）は、夫々そのブロック体５の正面図，右側面図，平面図，を示し、図５（ａ）（ｂ）はその組立て状態を示す縦断面図及び右側面図である。
この冷媒分流器は、図１、図２に示す如く、短管６とその内部に嵌着固定される短い円柱状のブロック体５とを有する。ブロック体５の軸線方向中央部の外周には、浅い環状溝部１が形成されている。環状溝部１はその溝幅が溝深さよりも著しく大きく形成されている。
【０００７】
次に、ブロック体５には、その軸線方向一端面の中心からブロック体５の中央位置迄達する第１孔２が形成されている。さらに、環状溝部１の外周に直径線上に枝孔３が貫通され、その枝孔３と第１孔２とがＴ字状に接続されている。夫々の枝孔３の流路断面積は、第１孔２の断面積以下に形成されている。また、環状溝部１の流路断面積は枝孔３の流路断面積以下に形成されている。
次に、枝孔３から周方向に９０°離れた位置に一対の凹溝状の第２孔４が軸方向他端部外周に形成されている。また、短管６の内周直径はブロック体５の最大外周直径に整合する。しかして、短管６内にブロック体５が挿入され、両者間が液密にろう付け固定される。
このようにしてなる冷媒分流器の第１孔２には、第１の冷媒管７の先端部が接続されると共に、一対の第２孔４には夫々第２の冷媒管８が挿入され、その挿入部が液密にろう付け固定される。
【０００８】
【実施例】
図４〜図５はその一実施例であり、一例としてブロック体５の高さは１５mm〜２５mm程であり、最大直径が１０mm〜２０mm、環状溝部１の溝幅は４mm〜８mm程であり、溝深さは0.3 mm〜0.8 mmである。また第１孔２の流路直径は３mm〜１０mm程であり、第２孔４の流路直径は３mm〜７mm程である。さらに、枝孔３の流路直径は３mm〜７mm程である。そして、環状溝部１の断面積は第１孔２および第２孔４並びに枝孔３の断面積よりも著しく小さく形成されている。
なお、これらの各寸法は各種空調用熱交換器の条件により適宜実験的に求めれるものであり、前記実施例に限定されるものではない。
【０００９】
【発明の作用・効果】
本発明は、第１孔２に流入した冷媒が複数の枝孔３に分流し、次いで夫々の枝孔３の出口端で環状溝部１内を夫々２方向に分流し、それらが周方向中間部で互いに合流して、夫々の第２孔４に均等に分流される。即ち、何れの枝孔３に分流した冷媒も、さらに分流し最終的に各ルートを流通した夫々の冷媒どうしが合流し、第２孔４に流入するため、各冷媒の流通ルートを問わず、夫々の第２孔４に流入するときには、冷媒の流量が均一になる。また、この冷媒分流器は一体構成のブロック体５とそれに被嵌される短管６とを有し且つ、外周の中央部に環状溝部１が形成された構造を有するから、製造し易く精度の高い冷媒分流器を提供できる。
さらに、環状溝部１の溝幅が溝深さよりも著しく大きく形成されているから、冷媒が環状溝部１内を流通するとき加速される。その加速によって冷媒中の液相と気相とが分離することを防止し、重力により偏流を防止して冷媒のさらなる均一な分配を行うことができる。また、枝孔３と第１孔２とはＴ字状に交差し、第２孔４が凹溝状に形成されているから、ブロック体５の成形が容易となる。
【図面の簡単な説明】
【図１】本発明の冷媒分流器の分解斜視図。
【図２】同冷媒分流器の組立て状態を示す斜視図。
【図３】同冷媒分流器の流通説明図。
【図４】同冷媒分流器のブロック体５の正面図（ａ），右側面図（ｂ），平面図（ｃ）。
【図５】同冷媒分流器のブロック体５の組立て状態を示す縦断面図（ａ）及び右側面図（ｂ）。
【図６】従来型冷媒分流器の斜視図。
【図７】他の従来型冷媒分流器の斜視説明図。
【符号の説明】
１ 環状溝部
２ 第１孔
３ 枝孔
４ 第２孔
５ ブロック体
６ 短管
７ 第１の冷媒管
８ 第２の冷媒管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerant distributor that diverts a refrigerant of an air conditioning heat exchanger that circulates in a gas-liquid two-phase state to a plurality of pipes.
[0002]
[Prior art]
Among air conditioning heat exchangers, there are indoor units in which a plurality of refrigerant flow paths are arranged in parallel. In that case, the refrigerant is supplied from the refrigerant pipes to the respective refrigerant flow paths via the flow dividers. Conventionally, there is a refrigerant flow divider formed as shown in FIG. 6 as the flow divider. This is a bifurcated branch into one pipe on the refrigerant inlet side and two pipes on the outlet side. One pipe is connected to the inflow side, and two pipes flowing to the respective refrigerant channels are connected to the outflow side.
A shunt as shown in FIG. 7 has also been proposed. In this case, a cylindrical block member is inserted into a cylindrical outer tube member, and grooves having a plurality of arc sections are formed on the outer periphery of the block member. This shunt is intended to reduce member costs and processing costs.
[0003]
[Problems to be solved by the invention]
Since the refrigerant circulates in the gas-liquid two-phase state in the flow divider, the liquid phase component is easily affected by gravity and flow velocity, and there is a drawback that the flow is not equally divided into each distribution pipe. Therefore, the refrigerant flows non-uniformly in each refrigerant flow path, and there is a possibility that the heat exchanger performance as a whole is deteriorated due to the flow divider.
Then, this invention makes it a subject to solve the problem which concerns.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 comprises a block body 5 and a short pipe 6 fitted on the outer periphery of the block body 5,
The block body is formed in a short cylindrical shape as a whole, and a shallow annular groove portion 1 is formed on the outer periphery of the central portion in the axial direction, and a tip is abutted on the inside from the center of one end surface in the axial direction. A hole 2 is formed on the axis, a pair of branch holes 3 having the same cross-sectional area are inserted from the outer periphery of the annular groove portion 1 to the center side, and the respective tips are communicated with the first hole 2, and its axial direction A pair of second holes 4 having the same cross-sectional area are formed at the edge of the other end surface and at a position shifted in the circumferential direction from the opening position of the branch hole 3 in the annular groove portion 1 , and the tip portion thereof is Consists of an integral structure communicated with the annular groove 1 ,
The short tube 6 has an inner diameter that matches the maximum outer diameter of the block body 5;
The annular groove 1 is formed so that the groove width is significantly larger than the groove depth, the first hole 2 and the branch hole 3 intersect in a T shape, and the pair of branch holes 3 are on the diameter line of the block body 5. A pair of concave groove-shaped second holes 4 are formed at positions 90 ° apart from the respective branch holes 3 in the circumferential direction,
A first refrigerant pipe 7 communicates with the first hole 2 in a liquid-tight manner, and a second refrigerant pipe 8 communicates with each of the second holes 4 in a liquid-tight manner,
The refrigerant flowing from the first refrigerant pipe 7 into the first hole 2 of the block body 5 is branched from the first hole 2 to the pair of branch holes 3 and reaches the opening facing the inner surface of the short pipe 6. It is divided into 180 degrees from the opening of the hole 3 in the reverse direction, passes between the outer periphery of the annular groove 1 and the inner surface of the short tube 6, and the refrigerant from the opposite direction joins each second hole 4. It is a refrigerant | coolant shunt of the heat exchanger for an air conditioning.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a refrigerant distributor according to the present invention, and FIG. 2 is a perspective view showing an assembled state thereof. FIG. 3 is an explanatory diagram of the refrigerant circulation. 4 (a), 4 (b), and 4 (c) show a front view, a right side view, and a plan view of the block body 5, respectively. FIGS. 5 (a) and 5 (b) are longitudinal sectional views showing the assembled state. It is a right view.
As shown in FIGS. 1 and 2, the refrigerant distributor has a short pipe 6 and a short columnar block body 5 fitted and fixed therein. A shallow annular groove 1 is formed on the outer periphery of the central portion in the axial direction of the block body 5. The annular groove portion 1 is formed so that the groove width is significantly larger than the groove depth.
[0007]
Next, a first hole 2 is formed in the block body 5 so as to reach the center position of the block body 5 from the center of one axial end surface thereof. Furthermore, the branch hole 3 is penetrated on the outer periphery of the annular groove portion 1 on the diameter line, and the branch hole 3 and the first hole 2 are connected in a T shape. The flow passage cross-sectional area of each branch hole 3 is formed to be equal to or smaller than the cross-sectional area of the first hole 2. Further, the channel cross-sectional area of the annular groove portion 1 is formed to be equal to or smaller than the channel cross-sectional area of the branch hole 3.
Next, a pair of concave second holes 4 are formed on the outer periphery of the other end in the axial direction at a position 90 ° away from the branch hole 3 in the circumferential direction. Further, the inner peripheral diameter of the short tube 6 matches the maximum outer peripheral diameter of the block body 5. Thus, the block body 5 is inserted into the short tube 6 and the two are fixed by brazing in a liquid-tight manner.
The first hole 2 of the refrigerant flow divider thus configured is connected to the tip of the first refrigerant pipe 7, and the second refrigerant pipe 8 is inserted into the pair of second holes 4, respectively. The insertion part is brazed and fixed in a liquid-tight manner.
[0008]
【Example】
FIG. 4 to FIG. 5 show an example thereof. As an example, the height of the block body 5 is about 15 mm to 25 mm, the maximum diameter is 10 mm to 20 mm, and the groove width of the annular groove 1 is about 4 mm to 8 mm. The groove depth is 0.3 mm to 0.8 mm. Further, the channel diameter of the first hole 2 is about 3 mm to 10 mm, and the channel diameter of the second hole 4 is about 3 mm to 7 mm. Furthermore, the channel diameter of the branch hole 3 is about 3 mm to 7 mm. The cross-sectional area of the annular groove 1 is significantly smaller than the cross-sectional areas of the first hole 2, the second hole 4, and the branch hole 3.
Each of these dimensions is appropriately determined experimentally depending on the conditions of various heat exchangers for air conditioning, and is not limited to the above-described embodiments.
[0009]
[Operation and effect of the invention]
In the present invention , the refrigerant flowing into the first hole 2 is divided into a plurality of branch holes 3, and then is divided into two directions in the annular groove portion 1 at the outlet ends of the respective branch holes 3, respectively. Are merged with each other and equally divided into the respective second holes 4. That is, the refrigerant branched into any of the branch holes 3 is further divided and finally the respective refrigerants that have circulated through each route join together and flow into the second hole 4, regardless of the distribution route of each refrigerant. When flowing into the respective second holes 4, the flow rate of the refrigerant becomes uniform. In addition, this refrigerant flow distributor has an integrally configured block body 5 and a short pipe 6 fitted thereto, and has a structure in which an annular groove portion 1 is formed at the center of the outer periphery. A high refrigerant flow divider can be provided.
Furthermore, since the groove width of the annular groove portion 1 is formed to be significantly larger than the groove depth, the coolant is accelerated when flowing through the annular groove portion 1. The acceleration prevents the liquid phase and the gas phase in the refrigerant from separating, prevents drift due to gravity, and enables further uniform distribution of the refrigerant. Moreover, since the branch hole 3 and the 1st hole 2 cross | intersect in T shape, and the 2nd hole 4 is formed in the concave groove shape, shaping | molding of the block body 5 becomes easy.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a refrigerant distributor according to the present invention.
FIG. 2 is a perspective view showing an assembled state of the refrigerant distributor.
FIG. 3 is a flow explanatory diagram of the refrigerant flow divider.
FIG. 4 is a front view (a), a right side view (b), and a plan view (c) of the block body 5 of the refrigerant distributor.
FIG. 5 is a longitudinal sectional view (a) and a right side view (b) showing an assembled state of the block body 5 of the refrigerant distributor.
FIG. 6 is a perspective view of a conventional refrigerant distributor.
FIG. 7 is a perspective explanatory view of another conventional refrigerant distributor.
[Explanation of symbols]
Reference Signs List 1 annular groove 2 first hole 3 branch hole 4 second hole 5 block body 6 short pipe 7 first refrigerant pipe 8 second refrigerant pipe

Claims (1)

ブロック体５と、そのブロック体５の外周に被嵌される短管６と、を具備し、
前記ブロック体は、全体が短い円柱状に形成され、その軸線方向中央部の外周に浅い環状溝部１が形成されると共に、その軸線方向の一端面の中心から先端を内部に突き当てた第１孔２が軸線上に形成され、前記環状溝部１の外周から互いに同一の断面積の一対の枝孔３が中心側に挿通され、夫々の先端が前記第１孔２に連通され、その軸線方向他端面の縁部で且つ、前記環状溝部１における前記枝孔３の開口位置から周方向にずれた位置に、互いに同一の断面積の一対の第２孔４が形成され、その先端部が前記環状溝部１に連通された一体構成よりなり、
前記短管６は、前記ブロック体５の最大外直径に整合する内直径を有し、
前記環状溝部１は、その溝幅が溝深さより著しく大きく形成され、前記第１孔２と前記枝孔３とがＴ字状に交差し、一対の枝孔３がブロック体５の直径線上に配置され、夫々の枝孔３から周方向に９０°離れた位置に、一対の凹溝状の前記第２孔４が形成され、
前記第１孔２に第１の冷媒管７が液密に連通されると共に、夫々の第２孔４に第２の冷媒管８が夫々液密に連通され、
第１の冷媒管７よりブロック体５の第１孔２に流入する冷媒は、その第１孔２から一対の枝孔３に分流して短管６の内面に対向する開口に達し、各枝孔３の前記開口から 180 度逆方向に分流して、環状溝部１の外周と短管６内面との間を通り、各第２孔４に互いに逆方向からの冷媒が合流することを特徴とする空調用熱交換器の冷媒分流器。 Comprising a block body 5 and a short tube 6 fitted on the outer periphery of the block body 5;
The block body is formed in a short cylindrical shape as a whole, and a shallow annular groove portion 1 is formed on the outer periphery of the central portion in the axial direction, and a tip is abutted on the inside from the center of one end surface in the axial direction. A hole 2 is formed on the axis, a pair of branch holes 3 having the same cross-sectional area are inserted from the outer periphery of the annular groove portion 1 to the center side, and the respective tips are communicated with the first hole 2, and its axial direction A pair of second holes 4 having the same cross-sectional area are formed at the edge of the other end surface and at a position shifted in the circumferential direction from the opening position of the branch hole 3 in the annular groove portion 1 , and the tip portion thereof is Consists of an integral structure communicated with the annular groove 1 ,
The short tube 6 has an inner diameter that matches the maximum outer diameter of the block body 5;
The annular groove 1 is formed so that the groove width is significantly larger than the groove depth, the first hole 2 and the branch hole 3 intersect in a T shape, and the pair of branch holes 3 are on the diameter line of the block body 5. A pair of concave groove-shaped second holes 4 are formed at positions 90 ° apart from the respective branch holes 3 in the circumferential direction,
A first refrigerant pipe 7 communicates with the first hole 2 in a liquid-tight manner, and a second refrigerant pipe 8 communicates with each of the second holes 4 in a liquid-tight manner,
The refrigerant flowing from the first refrigerant pipe 7 into the first hole 2 of the block body 5 is branched from the first hole 2 to the pair of branch holes 3 and reaches the opening facing the inner surface of the short pipe 6. It is divided into 180 degrees from the opening of the hole 3 in the reverse direction, passes between the outer periphery of the annular groove 1 and the inner surface of the short tube 6, and the refrigerant from the opposite direction joins each second hole 4. refrigerant flow divider of the air-conditioning heat exchanger.
JP21439899A 1999-07-28 1999-07-28 Refrigerant shunt of air conditioner heat exchanger Expired - Fee Related JP4186143B2 (en)

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JP4186143B2 true JP4186143B2 (en) 2008-11-26

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Publication number Priority date Publication date Assignee Title
KR20030092541A (en) * 2002-05-30 2003-12-06 위니아만도 주식회사 Condenser for aircon-system
CN102478330A (en) * 2010-11-23 2012-05-30 珠海格力电器股份有限公司 Air distribution structure and air conditioner with same
DE102013111967A1 (en) * 2013-10-30 2015-04-30 Valeo Klimasysteme Gmbh Refrigerant distributor for a hybrid or electric vehicle and refrigerant circuit with a refrigerant distributor

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