WO2019179519A1 - Détendeur électronique - Google Patents

Détendeur électronique Download PDF

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Publication number
WO2019179519A1
WO2019179519A1 PCT/CN2019/079248 CN2019079248W WO2019179519A1 WO 2019179519 A1 WO2019179519 A1 WO 2019179519A1 CN 2019079248 W CN2019079248 W CN 2019079248W WO 2019179519 A1 WO2019179519 A1 WO 2019179519A1
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WO
WIPO (PCT)
Prior art keywords
core
core assembly
valve
electronic expansion
expansion valve
Prior art date
Application number
PCT/CN2019/079248
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English (en)
Chinese (zh)
Inventor
王宇栋
Original Assignee
浙江三花智能控制股份有限公司
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 浙江三花智能控制股份有限公司 filed Critical 浙江三花智能控制股份有限公司
Priority to JP2020531761A priority Critical patent/JP6951579B2/ja
Priority to KR1020207020406A priority patent/KR102276928B1/ko
Publication of WO2019179519A1 publication Critical patent/WO2019179519A1/fr

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    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • 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
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing

Definitions

  • the present invention relates to the field of refrigeration control technology, and in particular to an electronic expansion valve.
  • the driving part (coil, rotor) and the flow regulating part (nut, screw, housing, valve needle, valve seat, valve seat core, connecting pipe, etc.) are composed, and the driving of the opening and closing valve is realized.
  • the force is driven by the coil to drive the rotor.
  • the rotor and the coil of the specified size have a constant driving force. As the diameter of the valve port increases, the pressure formed inside the valve body after the system refrigerant is upgraded is large, from the valve closing state to the valve closing state.
  • the driving force required for the product is large, on the one hand, the valve opening smoothness is affected, and on the other hand, the driving force required for the product needs to be improved by means of an amplifying coil, resulting in an increase in cost.
  • the main object of the present invention is to provide an electronic expansion valve capable of reducing the pressure difference force formed inside the valve body, thereby reducing the driving force required for the product and reducing the manufacturing cost of the product.
  • the present invention provides an electronic expansion valve comprising: a valve seat having a valve chamber and a valve port communicating with the valve chamber; a valve needle movably disposed in the valve chamber, the valve needle having a plug valve The closed position of the mouth and the open position of the open valve port; the outer casing is fixed to the valve seat, and the inside of the outer casing is a cavity; the screw rod and the nut threadedly engaged with the screw rod are located in the cavity, the nut is connected with the valve needle; the driving mechanism,
  • the utility model comprises a rotor located in the cavity and a coil arranged around the circumferential outer side of the outer casing, the rotor is connected with the screw rod, the rotor drives the screw rod to rotate under the driving of the coil, and the nut moves in the axial direction under the transmission of the screw rod, the valve The needle can be switched between an open position and a closed position under the driving of the nut; wherein the valve needle and the valve seat have an overflow passage, and
  • the electronic expansion valve when the electronic expansion valve is in the closed state, that is, the core assembly abuts the valve port, when the refrigerant enters from the valve port, the pressure inside the valve body is large, and the refrigerant may not be relieved due to pressure loss.
  • the body assembly cannot abut against the valve port, and the pressure between the valve chamber and the rotor chamber can be balanced by the sealing engagement of the seal with the integral portion, so that the electronic expansion valve is kept in the closed state, and when the electronic expansion valve is in the open state,
  • the core assembly is relatively far from the valve port, the refrigerant enters the rotor cavity from the valve port to enter the rotor chamber faster, and the pressure relief is slower, which is easy to form pressure accumulation.
  • the refrigerant passes between the sealing member and the notch portion.
  • the gap flows out and the pressure is gradually released. Therefore, the pressure difference force formed inside the valve body is relatively small whether the valve is opened or closed, and the driving force required for the coil is small when the valve is to be opened or closed. It does not need to be realized by increasing the coil or the like, which reduces the manufacturing cost.
  • FIG. 1 is a longitudinal sectional view showing an embodiment of an electronic expansion valve according to the present invention, wherein the core assembly of FIG. 1 is in a closed state;
  • Figure 2 is a schematic enlarged plan view showing a portion A of the electronic expansion valve of Figure 1;
  • FIG. 3 is a longitudinal sectional view showing an embodiment of an electronic expansion valve according to the present invention, wherein the core assembly of FIG. 3 is in an open state;
  • Figure 4 is a schematic enlarged plan view showing a portion B of the electronic expansion valve of Figure 3;
  • Figure 5 is a perspective view showing the core structure of the electronic expansion valve of Figure 1;
  • Figure 6 is a schematic longitudinal sectional view showing the core assembly of Figure 5;
  • Figure 7 is a partial cross-sectional structural view of the electronic expansion valve of Figure 1, wherein Figure 7 shows dimensions D1, D2, D3 and D4;
  • Figure 8 is a schematic longitudinal sectional view showing an embodiment of an electronic expansion valve according to the present invention, wherein the core assembly of Figure 8 is in a closed state;
  • Figure 9 is a schematic enlarged plan view showing a portion C of the electronic expansion valve of Figure 8.
  • Figure 10 is a schematic longitudinal sectional view showing an embodiment of an electronic expansion valve according to the present invention, wherein the core assembly of Figure 10 is in an open state;
  • Figure 11 is a schematic enlarged plan view showing a portion D of the electronic expansion valve of Figure 10;
  • Figure 12 is a perspective view showing the core structure of the core assembly of the electronic expansion valve of Figure 8.
  • Fig. 13 is a schematic longitudinal sectional view showing the core assembly of Fig. 12.
  • the electronic expansion valve of the present embodiment includes a valve seat 10, a lead screw 30 and a nut 40, a core assembly 20, a drive mechanism 50, a seal 70, and a housing 60.
  • the valve seat 10 has a valve chamber 1 and a valve port 13 communicating with the valve chamber 1.
  • the lead screw 30 and the nut 40 are threaded.
  • the core assembly 20 is fixedly coupled to a nut 40, at least a portion of which is movably disposed within the valve chamber 1, the core assembly 20 including a complete portion and a notch portion, at least a portion of which is located above the notch portion.
  • the driving mechanism 50 includes a rotor 51 and a coil 52. The rotor 51 is connected to the screw rod 30.
  • the rotor 51 drives the screw rod 30 to rotate by the coil 52.
  • the nut 40 can move in the axial direction by the threading action with the screw rod 30.
  • the core assembly 20 is driven by the nut 40 to be able to approach or away from the valve port 13.
  • a seal 70 is disposed between the valve seat 10 and the core assembly 20, and the seal 70 can be mated with the integral or notched portion.
  • the outer casing 60 is fixedly coupled to the valve seat 10, and the outer casing 60 has a rotor cavity 2.
  • the rotor cavity 2 and the valve cavity 1 are not in communication with each other by the sealing action of the sealing member 70, when the sealing member 70 and the notch portion In cooperation, there is a gap between the sealing member 70 and the notch portion, and the rotor chamber 2 communicates with the valve chamber 1 through the gap.
  • the core assembly 20 when the electronic expansion valve is in the closed state, that is, the core assembly 20 abuts against the valve port 13, when the refrigerant enters from the valve port 13, the pressure inside the valve body is large, and the refrigerant is not relieved by pressure. It may be that the core assembly 20 cannot abut against the valve port 13 and the pressure of the valve chamber 1 and the rotor chamber 2 can be balanced by the sealing engagement of the sealing member 70 with the integral portion so that the electronic expansion valve remains in the closed state.
  • the electronic expansion valve When the electronic expansion valve is in the valve open state, that is, the core assembly 20 is relatively far from the valve port 13, the refrigerant enters the rotor cavity 2 from the valve port 13 and the pressure is relatively fast, and the pressure relief is slow, and pressure buildup is easily formed, and the seal 70 and the gap are formed. With the cooperation of the part, the refrigerant flows out through the gap between the sealing member 70 and the notch, and the pressure is gradually released. Therefore, the pressure difference force formed inside the valve body is relatively small when the valve is opened or closed. When the valve is opened or closed, the driving force required for the coil is small, and it is not necessary to increase the coil or the like, thereby reducing the manufacturing cost.
  • the shape of the above “complete portion” is not limited (for example, a cylindrical shape, a square column, or the like) as long as there is no gap between the sealing member 70 and the portion of the integral portion to which it is fitted.
  • the shape of the above-mentioned "notch portion” is not limited (for example, a polygonal column or an irregular shape) as long as there is a gap between the sealing member 70 and the portion of the "notch portion” to which it is fitted.
  • the notch portion is engaged with the sealing member 70.
  • the meaning of the term "fit” is not necessarily indicated as a contact fit, and the notch portion may correspond to the seal member 70 (not in contact), and the notch portion may be There is a gap between the outer wall and the interior of the seal 70.
  • the outer wall of the core assembly 20 is provided with a flow passage groove 24 , and the shaft portion of the core assembly 20 where the flow passage groove 24 is located forms a notch portion and a core body.
  • the remaining shaft segment portion of assembly 20 forms a complete portion.
  • the sealing member 70 is positioned above the overflow groove 24, and the inner surface of the sealing member 70 is fitted to the outer wall of the core assembly 20, the sealing member 70 The outer surface is in contact with the inner wall of the valve seat 10, so that the sealing member 70 can function as a seal isolation, so that the valve chamber 1 and the rotor chamber 2 are not in communication with each other.
  • the sealing member 70 corresponds to the overflow groove 24, so that the inner surface of the sealing member 70 and the groove bottom of the flow passage groove 24 have a gap, the valve chamber
  • the refrigerant in the first chamber can enter the rotor chamber 2 from the gap, and the refrigerant in the rotor chamber 2 can also enter the valve chamber 1 from the gap, thereby achieving the purpose of quickly achieving pressure balance between the valve chamber 1 and the rotor chamber 2.
  • the above object is achieved by providing a groove, the structure is simple, the processing is convenient, and the cost is low.
  • the flow passage groove 24 is a long groove extending in the axial direction of the core assembly 20.
  • the above structure is simple and convenient for processing.
  • the flow passage groove 24 is a long groove extending in the axial direction of the core assembly 20.
  • the above structure is simple and convenient for processing.
  • the tip end of the overcurrent groove 24 has a distance from one end of the core assembly 20 near the valve port 13 and one end of the core assembly 20 away from the valve port 13. .
  • the core assembly 20 includes a first core segment 21 fixedly coupled to the nut 40 and a second core segment 22 located below the first core segment 21,
  • the outer diameter of the two core segments 22 is greater than the outer diameter of the first core segment 21, and the seal 70 is located between the first core segment 21 and the valve seat 10.
  • the above structure is simple, and the outer diameter of the second core segment 22 is larger than the diameter of the valve port 13 to enable the core assembly 20 to block the valve port 13.
  • the junction of the first core segment 21 and the second core segment 22 forms a stepped surface 25, and the valve seat 10 is provided with a first stop structure 90,
  • the lower surface of a stop structure 90 is capable of abutting against the stepped surface 25.
  • the above structure can limit the moving position of the core assembly 20, and fix the upward stroke of the core assembly 20, thereby ensuring that the opening and closing of the electronic expansion valve is more effective (high efficiency).
  • the first stop structure 90 is a lower retaining ring.
  • the nut 40 is provided with a boss portion 41.
  • the valve seat 10 is provided with a second stop structure 100 above the first stop structure 90, and the second stop The upper surface of the stopper structure 100 can abut against the lower surface of the boss portion 41.
  • the above structure can limit the moving position of the core assembly 20 and fix the downward stroke of the core assembly 20.
  • the core assembly 20 is located at the lower stop position. The above structure prevents the abutting force of the core assembly 20 of the electronic expansion valve from the valve port 13 from being excessive, thereby ensuring the service life of the core assembly 20.
  • the first stop structure 90 is a lower retaining ring
  • the second stop structure 100 is an upper retaining ring
  • the sealing member 70 is a sealing ring
  • the sealing ring is sandwiched between A stop structure 90 and the second stop structure 100 are disposed, and the core assembly 20 is disposed in the upper retaining ring, the lower retaining ring, and the sealing ring.
  • the above structure is simple, and the fixing of the sealing ring is facilitated.
  • the nut 40 is provided with a boss portion 41.
  • the electronic expansion valve further includes a support member 80 fixedly disposed on the valve seat 10.
  • the support member 80 is provided with a limited position groove. 81.
  • the boss 41 can be engaged with the limiting groove 81.
  • the core assembly 20 when the lower surface of the boss portion 41 abuts against the upper surface of the upper retaining ring, the core assembly 20 is located at the lower stop position (which cannot continue to move downward), and the core assembly 20 can be restricted from continuing downward movement.
  • the above-mentioned convex portion 41 has two functions at the same time, thereby maximizing the use of the structure, avoiding designing a new structure, and reducing the production cost.
  • the support member 80 has a cup shape, and the bottom of the support member 80 is provided with an upwardly extending opening, and the opening forms a limiting groove 81.
  • the side wall of the limiting groove 81 can stop the side wall of the boss 41 so that the nut 40 cannot rotate along its axis.
  • the core assembly 20 is located at the upper stop position (the upward movement cannot be continued).
  • the screw rod 30 is fixed to the rotor 51, and the rotor 51 and the screw rod 30 are supported by the support member 80.
  • the elastic member 110 is disposed between the support member 80 and the nut 40. The elastic member 110 can apply a downward force to the nut 40 to prevent the nut 40 from swaying upward.
  • the valve seat 10 includes a valve seat body 11 and a connecting seat 12 fixed to the valve seat body 11, and the connecting seat 12 and the valve seat body 11 form a valve chamber 1 therein.
  • the valve port 13 is disposed on the valve seat body 11.
  • the connecting seat 12 is provided with a mounting hole 121.
  • the mounting hole 121 includes a mounting portion and a guiding portion having a larger hole diameter than the mounting portion and located below the mounting portion.
  • the outer wall of the core assembly 20 cooperates with the guiding portion.
  • the seal 70 is located between the bore wall of the mounting section and the outer wall of the core assembly 20.
  • the outer wall of the core assembly 20 is provided with a flow passage groove 24, and the shaft portion of the core assembly 20 where the flow passage groove 24 is located forms a notch portion and a core body.
  • the remaining shaft portion of the assembly 20 forms a complete portion, and the lower end of the flow passage groove 24 is lower than the lower end of the hole wall of the mounting hole 121.
  • the mounting hole 121 is a stepped hole, and the sealing member 70 is fixed to the stepped surface 122 of the stepped hole.
  • the above structure is simple and easy to assemble.
  • the seal 70 can be secured to the step surface 122 by bonding, fastener attachment, interference bonding, and the like.
  • valve seat body 11 is spaced apart from the first interface 14 and the second interface 15, wherein the horizontal tube is inserted into the first interface 14, the second interface 15 and the valve
  • the port 13 is connected and the standpipe is inserted into the second interface 15.
  • the core assembly 20 has a communication cavity 4 therein, and the nut 40 is located in the communication cavity 4 and fixed on the core assembly 20, between the nut 40 and the core assembly 20.
  • An overcurrent structure is provided to allow the communication chamber 4 and the rotor chamber 2 to communicate with each other through the overcurrent structure.
  • the above structure is such that when the core assembly is in the closed position and the refrigerant flows from the valve port 13 into the communication chamber 4, the refrigerant can continue to enter the rotor chamber 2 through the overflow structure to balance the pressure of the communication chamber 4 and the rotor chamber 2, thereby As the core assembly 20 moves upward, the downward resistance experienced by the nut 40 is reduced, ultimately achieving a smoother opening of the core assembly 20.
  • the nut is provided with a flow through hole, and the overflow hole forms the above-mentioned overcurrent structure.
  • the above structure is simple and easy to process.
  • the electronic expansion valve of the second embodiment is different from the electronic expansion valve of the first embodiment in the specific shape of the core assembly 20.
  • the core assembly 20 includes a first core segment 21, a second core segment 22, and a first core segment 21 and a second core segment 22 that are fixedly coupled to the nut 40.
  • the contraction section 23, the outer diameter of the constricted section 23 gradually decreases from the first core section 21 to the second core section 22.
  • the constricted section 23 forms a notch and the first core section 21 forms a complete portion.
  • the sealing member 70 When the core assembly 20 is in the closed state, the sealing member 70 can be in sealing contact with the outer wall of the first core segment 21 and the inner wall of the valve seat 10, and when the core assembly 20 is in the open state, the sealing member 70 and the constricted portion There is a distance between the outer walls of 23. Specifically, when the core assembly 20 is moved downward to the valve closed state, the sealing member 70 corresponds to the first core segment 21, and the inner surface of the sealing member 70 is fitted to the outer wall of the first core segment 21, and the sealing member 70 The outer surface is in contact with the inner wall of the valve seat 10 (preferably the hole wall of the mounting hole 121), so that the sealing member 70 can function as a seal isolation, so that the valve chamber 1 and the rotor chamber 2 are not in communication with each other.
  • the seal 70 corresponds to the constricted section 23, and since the outer diameter of the constricted section 23 is small, the inner surface of the seal 70 and the outer surface of the constricted section 23 are A gap is formed, and the refrigerant in the valve chamber 1 can enter the rotor chamber 2 from the gap, and the refrigerant in the rotor chamber 2 can also enter the valve chamber 1 from the gap, so that the valve chamber 1 and the rotor chamber 2 can quickly reach the pressure balance. the goal of.
  • the above structure is simple and easy to process.
  • the junction of the second core segment 22 and the constricted portion 23 forms a stepped surface 25.
  • the above structure is simple, and it is not necessary to separately provide other step faces, thereby facilitating processing and production.
  • D1 is the outer diameter of the first core segment 21
  • D2 is the diameter D2 of the valve port 13
  • D3 is the second core segment 22.
  • the outer diameter, D4 is the inner diameter of the core assembly 20
  • SD1 is the cross-sectional area of the first core segment 21
  • SD2 is the area of the valve port 13
  • SD3 is the area of the second core segment 22
  • SD4 is the core assembly 20.
  • the sealing member 70 can be in sealing contact with the outer wall of the core assembly 20 at the upper portion of the notch portion and the inner wall of the valve seat 10 to achieve a seal (circumferential seal).
  • the valve chamber 1 and the rotor chamber 2 are vertically separated by a sealing member 70, and the rotor chamber 2 is connected to the rotor chamber 2
  • the cavity 4 penetrates up and down; the valve cavity 1 and the communication cavity 4 are sealed and abutted by the sealing pair and the valve port 13.
  • the pressure of the refrigerant in the horizontal tube acts on the core assembly 20, and the core assembly 20 is subjected to an area difference (SD3-SD2) and a pressure P to form an upward differential pressure; the core assembly 20 is also subjected to an area difference (SD3-SD1) and a pressure P.
  • the action forms a downward differential pressure.
  • the size of D1 is designed to be approximately equal to D2.
  • the body assembly 20 requires minimal driving force.
  • the core assembly 20 moves up, the sealing member 70 forms a partial seal with the core assembly 20, and the valve cavity 1 and the rotor cavity 2 pass through the gap between the sealing member 70 and the notch portion, and the pressure tends to be uniform.
  • the rotor cavity 2 and the communication cavity 4 are vertically penetrated, and the pressure tends to be uniform.
  • the cross tube pressure acts on the core assembly 20, and the core assembly 20 is subjected to an area difference (SD3-SD4) and a pressure P to form an upward differential pressure.
  • the difference in the area of the stepped surface 25 of the core assembly 20 (SD3-SD1) and the pressure P form a downward differential pressure + the difference in the top area of the core assembly 20 (SD1-SD4) and the pressure P to form a downward differential pressure;
  • the area difference between the upper and lower forces is zero, and the pressures of the valve chamber 1, the rotor chamber 2, and the communication chamber 4 tend to be uniform. Therefore, the upper and lower resultant forces of the core assembly 20 tend to be zero. There is less need for driving force when opening and closing the core assembly.
  • the sealing member 70 can be in sealing contact with the outer wall of the core assembly 20 at the upper portion of the notch portion and the inner wall of the valve seat 10 to achieve a seal (circumferential seal).
  • the valve chamber 1 and the rotor chamber 2 are vertically separated by a sealing member 70, and the rotor chamber 2 is connected to the rotor chamber 2
  • the cavity 4 penetrates up and down; the valve cavity 1 and the communication cavity 4 are sealed and abutted by the sealing pair and the valve port 13.
  • the vertical tube pressure acts on the core assembly 20, and the core assembly 20 is subjected to an area difference (SD2-SD4) and a pressure P to form an upward differential pressure; the area difference (SD1-SD4) and the pressure P form a downward differential pressure.
  • the core assembly 20 moves up, the sealing member 70 forms a partial seal with the core assembly 20, and the valve cavity 1 and the rotor cavity 2 pass through the gap between the sealing member 70 and the notch portion, thereby avoiding the rotor cavity 2 during the vertical pipe pressing process.
  • the pressure buildup formed inside (the pressure value is significantly larger than the pressure at the valve port 13 and the additional differential pressure is generated), and the pressure tends to be uniform.
  • the rotor cavity 2 and the communication cavity 4 are vertically penetrated, and the pressure tends to be uniform.
  • the vertical tube pressure acts on the core assembly 20, and the core assembly 20 is subjected to an area difference (SD3-SD4) and a pressure P to form an upward differential pressure; the stepped surface 25 of the core assembly 20 has a difference in area (SD3-SD1) and pressure.
  • the P action forms a downward differential pressure + the top area difference of the core assembly 20 (SD1-SD4) and the pressure P acts to form a downward differential force.
  • the pressures of the valve chamber 1, the rotor chamber 2, and the communication chamber 4 tend to be uniform. Therefore, the upper and lower resultant forces of the core assembly 20 tend to be zero. There is less need for driving force when opening and closing the core assembly.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

L'invention concerne un détendeur électronique comprenant : une base de soupape (10), la base de soupape (10) présentant une cavité de soupape (1) et un orifice de soupape (13) ; un arbre à vis (30) et un écrou (40) ; un ensemble noyau (20), l'ensemble noyau (20) étant fixement raccordé à l'écrou (40) et étant disposé de façon mobile dans la cavité de soupape (1) et l'ensemble noyau (20) comprenant une partie complète et une partie évidée ; un mécanisme d'entraînement (50), le mécanisme d'entraînement (50) comprenant un rotor (51) et une bobine (52), le rotor (51) étant raccordé à l'arbre à vis (30) et l'ensemble noyau (20) étant entraîné par l'écrou (40) pour se rapprocher ou s'éloigner de l'orifice de soupape (13) ; un joint d'étanchéité (70) disposé entre la base de soupape (10) et l'ensemble noyau (20), le joint d'étanchéité (70) pouvant coopérer avec la partie complète ou la partie évidée ; et un boîtier externe (60) présentant une cavité de rotor (2), lorsque le joint d'étanchéité (70) vient en prise avec la partie complète, l'action d'étanchéité du joint d'étanchéité (70) conduisant la cavité de rotor (2) et la cavité de soupape (1) à ne pas être en communication, et lorsque le joint d'étanchéité (70) vient en prise avec la partie évidée, un espace apparaît entre le joint d'étanchéité (70) et la partie évidée de sorte que la cavité de rotor (2) communique avec la cavité de soupape (1) par l'intermédiaire de l'espace.
PCT/CN2019/079248 2018-03-23 2019-03-22 Détendeur électronique WO2019179519A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020531761A JP6951579B2 (ja) 2018-03-23 2019-03-22 電子膨張弁
KR1020207020406A KR102276928B1 (ko) 2018-03-23 2019-03-22 전자 팽창 밸브

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CN201810246495.4 2018-03-23
CN201810246495.4A CN110296246B (zh) 2018-03-23 2018-03-23 电子膨胀阀

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KR (1) KR102276928B1 (fr)
CN (1) CN110296246B (fr)
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CN112901790B (zh) * 2019-11-19 2022-05-10 浙江盾安禾田金属有限公司 电子膨胀阀
JP2024085315A (ja) 2022-12-14 2024-06-26 味の素株式会社 樹脂組成物

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