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KR101313153B1 - Electric expansion valve according to the design of needle shape - Google Patents

Electric expansion valve according to the design of needle shape Download PDF

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Publication number
KR101313153B1
KR101313153B1 KR1020110057740A KR20110057740A KR101313153B1 KR 101313153 B1 KR101313153 B1 KR 101313153B1 KR 1020110057740 A KR1020110057740 A KR 1020110057740A KR 20110057740 A KR20110057740 A KR 20110057740A KR 101313153 B1 KR101313153 B1 KR 101313153B1
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expansion valve
needle
hole
orifice
refrigerant
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KR20120138338A (en
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김욱중
윤석호
이공훈
오동욱
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한국기계연구원
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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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Lift Valve (AREA)

Abstract

본 발명은 니들 형상에 따른 전자팽창밸브에 관한 것으로서, 더욱 상세하게는 니들 헤드부의 형상을 본문에 기술된 [제 1식]과 [제 2식]으로 설계함으로써, 오리피스를 관통하는 CO₂ 냉매의 유량이 선형적으로 유량제어가 가능해졌고, 그로 인해 전자팽창밸브의 효율이 증가하는 특징이 있다.The present invention relates to an electromagnetic expansion valve according to a needle shape, and more particularly, by designing the shape of the needle head portion as [formula 1] and [formula 2] described in the text, the flow rate of the CO 2 refrigerant passing through the orifice This linear flow rate control is made possible, thereby increasing the efficiency of the electromagnetic expansion valve.

Description

니들 형상에 따른 전자팽창밸브{Electric expansion valve according to the design of needle shape}Electric expansion valve according to the design of needle shape}

본 발명은 니들 형상에 따른 전자팽창밸브에 관한 것으로서, 더욱 상세하게는 니들 헤드부의 형상을 본문에 기술된 [제 1식]과 [제 2식]으로 설계함으로써, 오리피스를 관통하는 CO₂ 냉매의 유량이 선형적으로 유량제어가 가능해졌고, 그로 인해 전자팽창밸브의 효율이 증가하는 니들 형상에 따른 전자팽창밸브에 관한 것이다.
The present invention relates to an electromagnetic expansion valve according to a needle shape, and more particularly, by designing the shape of the needle head portion as [formula 1] and [formula 2] described in the text, the flow rate of the CO 2 refrigerant passing through the orifice This linear flow rate control is possible, and thus relates to an electromagnetic expansion valve according to a needle shape in which the efficiency of the electromagnetic expansion valve increases.

지구온난화 물질인 CFC 및 H(C)FC 계열의 냉매의 사용이 금지되면서 CO₂와 같은 자연냉매를 적용하는 냉동기 혹은 열펌프 시스템에 대한 연구가 활발하게 이루어져 왔다.As the use of CFC and H (C) FC series refrigerants, which are global warming materials, has been banned, studies on refrigerators or heat pump systems applying natural refrigerants such as CO₂ have been actively conducted.

그러나, 자연냉매로서 대표적으로 상용화가 이루어진 CO₂ 냉매를 이용한 열펌프 시스템의 핵심 요소기기 중의 하나인 팽창장치에 대한 연구 및 개발에 대한 사례는 문헌을 통하여 발표가 많이 이루어지지 않고 있다.However, many cases of research and development of the expansion device, which is one of the key components of the heat pump system using the CO₂ refrigerant, which has been commercialized as a natural refrigerant, are not widely published in the literature.

CO₂ 냉동시스템의 팽창장치로 적용하기 위한 모세관이나 오리피스에 대한 연구는 일부 사례가 있고, 일본에서는 Saginomiya, Fujikoki사 등에서 CO₂ 냉매용으로 전자팽창밸브를 개발하여 판매 중에 있으나 CO₂ 냉매용 전자팽창밸브 관련 연구결과는 전무한 상태이다.There are some cases of capillary tubes or orifices to be applied as expansion device of CO₂ refrigeration system. In Japan, Saginomiya and Fujikoki have developed and sold electromagnetic expansion valves for CO₂ refrigerants. There is no result.

이렇듯, 현재 시중에 개발되어 판매되는 전자팽창밸브 내의 니들(needle)은 일반적인 원뿔(conical) 형태로써, 냉매의 유량에 비선형성(nonlinearity, 非線形性)이 존재하는 문제점이 있다.
As such, the needle in the electronic expansion valve currently developed and sold in the market is a general conical shape, and there is a problem in that nonlinearity (non-linearity) exists in the flow rate of the refrigerant.

따라서, 본 발명은 상기 종래의 문제점을 해소하기 위해 안출된 것으로서,SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

니들 헤드부의 형상을 본문에 기술된 [제 1식]과 [제 2식]으로 설계함으로써, 오리피스를 관통하는 CO₂ 냉매의 유량이 선형적으로 유량제어가 가능해졌고, 그로 인해 전자팽창밸브의 효율이 증가하는 니들 형상에 따른 전자팽창밸브를 제공하는데 목적이 있다.
By designing the shape of the needle head in [Formula 1] and [Formula 2] described in the main text, the flow rate of the CO 2 refrigerant passing through the orifice can be linearly controlled, thereby improving the efficiency of the electromagnetic expansion valve. An object of the present invention is to provide an electromagnetic expansion valve according to an increasing needle shape.

상기 목적을 달성하고자, 본 발명은 CO₂ 냉매가 이송되도록 유입구와 배출구가 형성되고, 상기 유입구와 배출구를 이송하는 CO₂ 냉매를 팽창시키는 전자팽창밸브에 있어서,In order to achieve the above object, the present invention is in the inlet and outlet is formed so that the CO2 refrigerant is transported, in the electronic expansion valve for expanding the CO2 refrigerant conveying the inlet and outlet,

상기 배출구에 설치되어 CO₂ 냉매가 관통되도록 관통홀이 형성되는 오리피스와;An orifice installed in the discharge port and having a through hole formed therein to allow the CO 2 refrigerant to pass therethrough;

상기 오리피스의 관통홀 단면적(S)에 변화를 주도록 상,하로 구동되게 전자팽창밸브 내에 설치되고, 상기 관통홀의 단면적(S)에 변화를 주어 이송되는 CO₂ 냉매를 팽창시키는 니들;을 포함하여 구성되는 것을 특징으로 하는 니들 형상에 따른 전자팽창밸브에 관한 것이다.
And a needle installed in the electronic expansion valve to be driven up and down to change the cross-sectional area S of the orifice, and expanding the CO 2 refrigerant transferred by changing the cross-sectional area S of the through-hole. It relates to an electromagnetic expansion valve according to the needle shape, characterized in that.

이상에서 살펴 본 바와 같이, 본 발명의 니들 형상에 따른 전자팽창밸브는 니들 헤드부의 형상을 본문에 기술된 [제 1식]과 [제 2식]으로 설계함으로써, 오리피스를 관통하는 CO₂ 냉매의 유량이 선형적으로 유량제어가 가능해졌고, 그로 인해 전자팽창밸브의 효율이 증가하는 효과가 있다.
As described above, the electromagnetic expansion valve according to the needle shape of the present invention is designed by the shape of the needle head portion [formula 1] and [formula 2] described in the text, the flow rate of the CO₂ refrigerant through the orifice This linear flow rate control is possible, thereby increasing the efficiency of the electromagnetic expansion valve.

도 1은 본 발명의 제 1실시예에 따른 전자팽창밸브를 나타낸 단면도이고,
도 2는 본 발명의 제 1실시예에 따른 니들과 오리피스를 나타낸 개략도이고,
도 3은 본 발명의 제 1실시예에 따른 니들 형상을 실험한 그래프도이고,
도 4는 본 발명의 제 2실시예에 따른 니들과 오리피스를 나타낸 개략도이고,
도 5와 도 6은 본 발명의 제 2실시예에 따른 니들 형상을 실험한 그래프도이다.1 is a cross-sectional view showing an electromagnetic expansion valve according to a first embodiment of the present invention,
2 is a schematic view showing a needle and an orifice according to a first embodiment of the present invention,
3 is a graph illustrating an experiment of a needle shape according to the first exemplary embodiment of the present invention.
4 is a schematic view showing a needle and an orifice according to a second embodiment of the present invention,
5 and 6 are graphs illustrating the shape of the needle according to the second embodiment of the present invention.

본 발명은 상기의 목적을 달성하기 위해 아래와 같은 특징을 갖는다.The present invention has the following features to achieve the above object.

본 발명은 CO₂ 냉매가 이송되도록 유입구와 배출구가 형성되고, 상기 유입구와 배출구를 이송하는 CO₂ 냉매를 팽창시키는 전자팽창밸브에 있어서,In the present invention, the inlet and the outlet is formed so that the CO₂ refrigerant is transferred, the electronic expansion valve for expanding the CO₂ refrigerant conveying the inlet and outlet,

상기 배출구에 설치되어 CO₂ 냉매가 관통되도록 관통홀이 형성되는 오리피스와;An orifice installed in the discharge port and having a through hole formed therein to allow the CO 2 refrigerant to pass therethrough;

상기 오리피스의 관통홀 단면적(S)에 변화를 주도록 상,하로 구동되게 전자팽창밸브 내에 설치되고, 상기 관통홀의 단면적(S)에 변화를 주어 이송되는 CO₂ 냉매를 팽창시키는 니들;을 포함하여 구성되는 것을 특징으로 한다.
And a needle installed in the electronic expansion valve to be driven up and down to change the cross-sectional area S of the orifice, and expanding the CO 2 refrigerant transferred by changing the cross-sectional area S of the through-hole. It is characterized by.

이와 같은 특징을 갖는 본 발명은 그에 따른 바람직한 실시예를 통해 더욱 명확히 설명될 수 있을 것이다.The present invention having such characteristics can be more clearly described by the preferred embodiments thereof.

이하 첨부된 도면을 참조로 본 발명의 바람직한 실시예를 상세히 설명하도록 한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형예들이 있을 수 있음을 이해하여야 한다.Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

도 1은 본 발명의 제 1실시예에 따른 전자팽창밸브를 나타낸 단면도이고, 도 2는 본 발명의 제 1실시예에 따른 니들과 오리피스를 나타낸 개략도이고, 도 3은 본 발명의 제 1실시예에 따른 니들 형상을 실험한 그래프도이다.1 is a cross-sectional view showing an electromagnetic expansion valve according to a first embodiment of the present invention, Figure 2 is a schematic diagram showing a needle and an orifice according to a first embodiment of the present invention, Figure 3 is a first embodiment of the present invention This is a graph illustrating the experiment of needle shape.

도 1 내지 도 3에 도시한 바와 같이, 본 발명의 니들 형상에 따른 전자팽창밸브(30)는 니들(10)의 형상을 설계변경한 뒤, 전자팽창밸브(30)를 실험하여 니들(10) 형상에 따른 비선형성 즉, CO₂ 냉매의 질량유량 상관식을 개선하기 위한 것으로, 우선, 상기 전자팽창밸브(30)를 일반적인 CO₂ 열펌프 사이클(압축기, 가스냉각기, 내부열교환기, 증발기, 사방밸브로 구성, 미도시)에 설치하여 실험한다.As shown in Figures 1 to 3, the electromagnetic expansion valve 30 according to the needle shape of the present invention after changing the design of the needle 10, the experiment of the electromagnetic expansion valve 30 to the needle 10 In order to improve the non-linearity according to the shape, that is, the mass flow correlation of CO₂ refrigerant, first, the electromagnetic expansion valve 30 is composed of a general CO₂ heat pump cycle (compressor, gas cooler, internal heat exchanger, evaporator, and four-way valve). , Installed in the experiment).

상기 전자팽창밸브(30)는 도 1에서처럼 CO₂ 냉매가 외부에서 유입되도록 유입구(31)가 측면에 관통 형성되고, 상기 유입구(31)를 통해 유입된 CO₂ 냉매는 전자팽창밸브(30) 내부를 이송하도록 내부가 중공되며, 상기 전자팽창밸브(30) 내에 유입된 CO₂ 냉매는 전자팽창밸브(30)의 하단부에 관통 형성되는 배출구(32)를 통해 배출된다.The electromagnetic expansion valve 30 is formed through the inlet 31 so as to penetrate the CO₂ refrigerant from the outside as shown in Figure 1, the CO₂ refrigerant introduced through the inlet 31 is transferred to the electronic expansion valve 30 The inside is hollow so that the CO 2 refrigerant introduced into the electromagnetic expansion valve 30 is discharged through the outlet 32 formed through the lower end of the electromagnetic expansion valve 30.

여기서, 상기 배출구(32)를 통해 배출되는 CO₂ 냉매는 오리피스(20)와 니들(10)를 통해 팽창되는 것이다.Here, the CO 2 refrigerant discharged through the outlet 32 is expanded through the orifice 20 and the needle 10.

상기 오리피스(orifice,20)는 도 1과 도 2에 도시한 바와 같이, 배출구(32)에 설치되어 CO₂ 냉매가 관통되도록 관통홀(21)이 형성되고, 상기 관통홀(21)은 출구 측이 확관되어 CO₂ 냉매가 분사되듯이, 방사상으로 퍼지면서 배출된다.As shown in FIGS. 1 and 2, the orifice 20 is installed in the outlet 32 so that a through hole 21 is formed to penetrate the CO 2 refrigerant, and the through hole 21 has an outlet side. It is expanded and discharged radially as if CO2 refrigerant is injected.

여기서, 상기 오리피스(20)는 도 1에서처럼, 전자팽창밸브(30)의 배출구(32)에 설치되도록 단면상 "T" 형태로 양측에 단턱이 형성되어 배출구(32)에 걸쳐져 설치된다.Here, the orifice 20, as shown in Figure 1, so that the stepped on both sides in the form of "T" in cross-section so as to be installed in the outlet 32 of the electromagnetic expansion valve 30 is installed across the outlet 32.

상기 니들(needle,10)은 전자팽창밸브(30) 내에 설치되는데, 상기 배출구(32)와 동일한 선상에 설치되어 상,하로 구동되면서, 상기 오리피스(20)의 관통홀(21)에 삽입된다. 이때, 상기 니들(10)은 전자팽창밸브(30)의 외부면 즉, 상측면에 설치되는 스텝핑 모터(stepping motor,미도시)의 구동에 의해 상,하 구동된다.The needle 10 is installed in the electromagnetic expansion valve 30 and is installed on the same line as the outlet 32 and is driven up and down, and inserted into the through hole 21 of the orifice 20. In this case, the needle 10 is driven up and down by the driving of a stepping motor (not shown) installed on the outer surface, that is, the upper side of the electromagnetic expansion valve (30).

여기서, 상기 니들(10)은 오리피스(20)의 관통홀(21)에 삽입되어 관통홀(21)의 단면적(S)에 변화를 주도록 끝단부에 헤드부(11)가 일체형으로 돌출형성되고, 상기 헤드부(11)가 관통홀(21)에 삽입되는 깊이에 따라 관통홀(21)의 단면적(S) 크기가 변화되며, 그 크기에 따라 이송되는 CO₂ 냉매가 팽창되는 것이다.Here, the needle 10 is inserted into the through-hole 21 of the orifice 20 to the head portion 11 protrudes integrally to the end portion to change the cross-sectional area (S) of the through-hole 21, The size of the cross-sectional area (S) of the through hole 21 is changed according to the depth of the head portion 11 is inserted into the through hole 21, and the CO 2 refrigerant transported according to the size is expanded.

그리고, 상기 니들(10)의 헤드부(11)는 도 2에서처럼 원뿔(conical) 형태로 형성되는데, 다음과 같은 [제 1식]에 의해 헤드부(11)의 원뿔 형태가 설계되는 것이다.In addition, the head portion 11 of the needle 10 is formed in a conical shape as shown in FIG. 2, and the conical shape of the head portion 11 is designed by the following [First Formula].

[제 1식][Formula 1]

Figure 112011045029837-pat00001
Figure 112011045029837-pat00001

Figure 112013018668984-pat00021
Figure 112013018668984-pat00021

Figure 112011045029837-pat00003
Figure 112011045029837-pat00003

Figure 112013018668984-pat00022
Figure 112013018668984-pat00022

여기서, AB는 오리피스(20)의 관통홀(꼭지점부위,21)과 헤드부(11)의 외부면이 직각으로 접촉되는 최단거리이고, h는 헤드부(11)의 상,하 구동길이(리프트 변화길이,높이)이고, α는 헤드부(11) 각도이고, χ는 오리피스(20)의 관통홀(21)에 헤드부(11)가 수평으로 접촉되는 거리이고, r은 니들(10)의 중심축에서 헤드부(11)의 외부면까지의 반경이고, D는 오리피스(20)의 관통홀(21) 직경이고, S는 오리피스(20)의 관통홀(21) 단면적을 나타낸다.Here, AB is the shortest distance that the through-hole (vertical part 21) of the orifice 20 and the outer surface of the head portion 11 is perpendicular to each other, h is the upper and lower driving length (lift) of the head portion 11 Change length, height), α is the angle of the head portion 11, χ is the distance that the head portion 11 is in horizontal contact with the through hole 21 of the orifice 20, r is the Radius from the central axis to the outer surface of the head portion 11, D is the diameter of the through hole 21 of the orifice 20, S represents the cross-sectional area of the through hole 21 of the orifice 20.

이렇듯, 상기에서 설계된 원뿔 형태의 헤드부(11)가 설치된 전자팽창밸브(30)를 실험했을 때, 도 3에 도시한 바와 같은, 실험데이터 값이 나오고, 이때, α는 25°이고, D는 1.8mm로 해서 실험하였다.
As described above, when the electronic expansion valve 30 in which the conical head portion 11 is designed is tested, the experimental data values shown in FIG. 3 are obtained, wherein α is 25 °, and D is It experimented as 1.8 mm.

도 4는 본 발명의 제 2실시예에 따른 니들과 오리피스를 나타낸 개략도이고, 도 5와 도 6은 본 발명의 제 2실시예에 따른 니들 형상을 실험한 그래프도이다.4 is a schematic view showing a needle and an orifice according to a second embodiment of the present invention, and FIGS. 5 and 6 are graphs of the needle shape according to the second embodiment of the present invention.

도 4 내지 도 6에 도시한 바와 같이, 제 2실시예에서의 전자팽창밸브(30)는 제 1실시예에서 기술한 전자팽창밸브(30)와 동일한 구성, 구조, 도번이므로 별도의 기술은 하지 않고, 오리피스(20) 또한 제 1실시예에서 기술한 상기 오리피스(20)와 동일한 구성, 구조, 도번이므로 별도의 기술은 하지 않는다.As shown in Figs. 4 to 6, the electromagnetic expansion valve 30 in the second embodiment has the same configuration, structure, and number as the electromagnetic expansion valve 30 described in the first embodiment. In addition, the orifice 20 is also the same configuration, structure, and the same number as the orifice 20 described in the first embodiment, so no separate description is made.

다만, 제 2실시예에서는 니들(10)의 형상이 제 1실시예의 니들(10)와 상이하여 이하에서 상세히 설명한다. 이때, 상기 니들(10)의 도번은 제 1실시예의 니들(10)와 동일하다.However, in the second embodiment, the shape of the needle 10 is different from the needle 10 of the first embodiment, which will be described in detail below. At this time, the number of the needle 10 is the same as the needle 10 of the first embodiment.

여기서, 상기 니들(10)은 제 1실시예의 니들(10)와 설치위치가 동일하고, 상기 니들(10)의 끝단부에 헤드부(11)가 일체형으로 돌출 형성되는 것도 동일하다.Here, the needle 10 is the same as the installation position of the needle 10 of the first embodiment, it is also the same that the head portion 11 protrudes integrally formed at the end of the needle (10).

그러나, 제 2실시예의 헤드부(11)는 도 4에 도시한 바와 같이, 관통홀(21)의 단면적(S)에 변화를 주도록 곡선형 원뿔(curvilinear conical) 형태 즉, 원뿔 형태에서 원뿔의 외주연이 곡선(curvilinear)으로 이루어지게 형성된 것으로, 별도의 곡선형 원뿔이라고 명칭하였다.However, as shown in FIG. 4, the head part 11 of the second embodiment has a curved conical shape, that is, a conical shape in order to change the cross-sectional area S of the through hole 21. The periphery is formed to be curved (curvilinear), it was named as a separate curved cone.

이렇듯, 상기 헤드부(11)가 곡선형 원뿔 형태는 다음과 같은 [제 2식]에 의해 헤드부(11)의 형태가 설계되는 것이다.As such, the head portion 11 is a curved cone shape is the shape of the head portion 11 is designed by the following [second formula].

[제 2식][Formula 2]

Figure 112011045029837-pat00005
Figure 112011045029837-pat00005

Figure 112011045029837-pat00006
Figure 112011045029837-pat00006

Figure 112013018668984-pat00023
Figure 112013018668984-pat00023

여기서, h는 헤드부(11)의 상,하 구동길이(리프트 변화길이,높이)이고, H는 헤드부(11)의 최상측으로 구동된 길이 즉 헤드부(11)가 최상측에 위치했을 때의 높이이고, r은 니들(10)의 중심축에서 헤드부(11)의 외부면까지의 반경이고, D는 오리피스(20)의 관통홀(21) 직경이고, S는 오리피스(20)의 관통홀(21) 단면적을 나타내는 것이다.Here, h is the up and down drive length (lift change length, height) of the head portion 11, H is the length driven to the top of the head portion 11, that is, when the head portion 11 is located at the top Is the height of r, the radius from the central axis of the needle 10 to the outer surface of the head portion 11, D is the diameter of the through-hole 21 of the orifice 20, S is the penetration of the orifice 20 It shows the hole 21 cross-sectional area.

이렇듯, 상기 곡선형 원뿔 형태의 헤드부(11)를 전자팽창밸브(30)에 설치한 뒤 실험했을 때, 도 5와 도 6의 그래프 도에서처럼 실험데이터 값이 나온다.As described above, when the curved cone-shaped head portion 11 is installed in the electronic expansion valve 30 and then tested, experimental data values are obtained as shown in the graphs of FIGS. 5 and 6.

여기서, 도 5에는 R(헤드부(11)의 직경)을 0.9mm로 H를 2.7mm로 주어진 상태에서 정수(constant)를 1.0으로 주고 실험한 그래프도이고, 도 6에는 R(헤드부(11)의 직경)을 0.9mm로 H를 2.7mm로 주어진 상태에서 정수(constant)를 1.05로 주고 실험한 그래프도이다.
Here, FIG. 5 is a graph showing experiments with R as a constant (1.0) in a state where R (diameter of the head portion 11) is 0.9 mm and H is 2.7 mm, and FIG. 6 is R (head portion 11). Is a graph of 0.9mm and H as 2.7mm.

10 : 니들 11 : 헤드부
20 : 오리피스 21 : 관통홀
30 : 전자팽창밸브 31 : 유입구
32 : 배출구10: needle 11: head portion
20: Orifice 21: Through Hole
30: electromagnetic expansion valve 31: inlet
32: outlet

Claims (7)

CO₂ 냉매가 이송되도록 유입구(31)와 배출구(32)가 형성되고, 상기 유입구(31)와 배출구(32)를 이송하는 CO₂ 냉매를 팽창시키는 전자팽창밸브(30)에 있어서,
상기 배출구(32)에 설치되어 CO₂ 냉매가 관통되도록 관통홀(21)이 형성되는 오리피스(20)와;
상기 오리피스(20)의 관통홀(21) 단면적(S)에 변화를 주도록 상,하로 구동되게 전자팽창밸브(30) 내에 설치되고, 상기 관통홀(21)의 단면적(S)에 변화를 주어 이송되는 CO₂ 냉매를 팽창시키는 니들(10);을 포함하여 구성되고,
상기 니들(10)의 끝단부에는 오리피스(20)의 관통홀(21)에 삽입되어 관통홀(21)의 단면적(S)을 변화시키도록 헤드부(11)가 돌출 형성되고,
상기 헤드부(11)는 오리피스(20)의 관통홀(21)에 용이하게 삽입되도록 곡선형 원뿔(curvilinear conical) 형태로 형성되며,
상기 곡선형 원뿔 형태의 헤드부(11)는 아래의 [제 2식]에 의해 설계되는 것을 특징으로 하는 니들 형상에 따른 전자팽창밸브.
[제 2식]
Figure 112013018668984-pat00024

Figure 112013018668984-pat00025

Figure 112013018668984-pat00026

(여기서, h는 헤드부의 상,하 구동길이, H는 헤드부의 최상측으로 구동된 길이, r은 니들의 중심축에서 헤드부의 외부면까지의 반경, D는 오리피스의 관통홀 직경, S는 오리피스의 관통홀 단면적임.)
In the inlet 31 and the outlet 32 is formed so that the CO 2 refrigerant is transported, in the electromagnetic expansion valve 30 for expanding the CO 2 refrigerant for transporting the inlet 31 and outlet 32,
An orifice (20) installed in the outlet (32) and having a through hole (21) formed therein to allow the CO2 refrigerant to pass therethrough;
It is installed in the electromagnetic expansion valve 30 to be driven up and down so as to change the cross sectional area S of the through hole 21 of the orifice 20, and transfers the cross sectional area S of the through hole 21 by changing it. It is configured to include; a needle (10) for expanding the refrigerant CO₂
The head portion 11 protrudes from the end portion of the needle 10 to be inserted into the through hole 21 of the orifice 20 so as to change the cross-sectional area S of the through hole 21.
The head portion 11 is formed in the shape of a curved cone (curvilinear conical) to be easily inserted into the through hole 21 of the orifice 20,
The curved cone-shaped head portion 11 is an electromagnetic expansion valve according to the needle shape, characterized in that designed by the following [second formula].
[Formula 2]
Figure 112013018668984-pat00024

Figure 112013018668984-pat00025

Figure 112013018668984-pat00026

(Where h is the top and bottom driving length of the head part, H is the length driven to the top of the head part, r is the radius from the central axis of the needle to the outer surface of the head part, D is the through hole diameter of the orifice, S is the Through hole cross section.)
제 1항에 있어서,
상기 니들(10)은 전자팽창밸브(30)의 외부면에 설치되는 스텝핑 모터(stepping motor)에 의해 상,하 구동되는 것을 특징으로 하는 니들 형상에 따른 전자팽창밸브.
The method of claim 1,
The needle (10) is an electronic expansion valve according to the needle shape, characterized in that it is driven up, down by a stepping motor (stepping motor) installed on the outer surface of the electromagnetic expansion valve (30).
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12072039B2 (en) 2018-12-20 2024-08-27 Danfoss A/S Electric expansion valve
US12117215B2 (en) 2018-12-20 2024-10-15 Danfoss A/S Valve having a motor arranged inside a tube having sections with different diameters
KR20250085462A (en) 2023-12-05 2025-06-12 동일기계공업 주식회사 Needle type electronic expansion valve

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JP2000213660A (en) * 1999-01-22 2000-08-02 Samsung Electronics Co Ltd Electronic expansion valve for refrigeration cycle
JP2000274544A (en) * 1999-03-25 2000-10-03 Pacific Ind Co Ltd Electric expansion valve
JP2007032980A (en) * 2005-07-28 2007-02-08 Mitsubishi Electric Corp Expansion valve
JP2010019133A (en) * 2008-07-09 2010-01-28 Denso Corp Ejector and heat pump cycle device

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Publication number Priority date Publication date Assignee Title
JP2000213660A (en) * 1999-01-22 2000-08-02 Samsung Electronics Co Ltd Electronic expansion valve for refrigeration cycle
JP2000274544A (en) * 1999-03-25 2000-10-03 Pacific Ind Co Ltd Electric expansion valve
JP2007032980A (en) * 2005-07-28 2007-02-08 Mitsubishi Electric Corp Expansion valve
JP2010019133A (en) * 2008-07-09 2010-01-28 Denso Corp Ejector and heat pump cycle device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12072039B2 (en) 2018-12-20 2024-08-27 Danfoss A/S Electric expansion valve
US12117215B2 (en) 2018-12-20 2024-10-15 Danfoss A/S Valve having a motor arranged inside a tube having sections with different diameters
KR20250085462A (en) 2023-12-05 2025-06-12 동일기계공업 주식회사 Needle type electronic expansion valve

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