KR102673777B1 - Electronic expansion valve for heating and cooling systems - Google Patents

Abstract

The present invention relates to an electronic expansion valve for a cooling and heating system, and particularly to an electronic expansion valve for a cooling and heating system that is not affected by the pressure of the refrigerant during bypass.
The electronic expansion valve 1000 for a cooling and heating system of the present invention includes a body 1110 with a bypass hole passage, a body portion 1100 with a first valve 1120 with an orifice in the axial direction, and an orifice. A needle portion 1200 equipped with a needle 1210 that moves in the axial direction as it is inserted, a second valve 1310 with a bypass hole formed on the outer circumferential surface, and a bypass hole inserted in the axial direction from the lower part of the second valve. A valve unit 1300 equipped with a spool valve unit 1320 capable of closing the hole, a spool stopper unit 1330 coupled to the upper part of the second valve, and a valve unit 1300 coupled to the upper part of the second valve and the body so that the lower part is attached to the body. An adapter unit 1400 equipped with an accommodated adapter 1410 and a magnet guide 1420 fixed to the upper part of the adapter, a magnet unit 1500 inserted into the upper part of the adapter unit and rotated, and an axial movement simultaneously with rotation. At the other end, there is a rod part 1600 fastened to the axial center of the needle part, a magnet cap 1700 that blocks and supports one end of the magnet part in a state in which the rod part is assembled, and a sleeve 1800 fixed to the adapter part. ) and a mold part 1900 capable of rotating the magnet part.

Description

Electronic expansion valve for heating and cooling systems}

The present invention relates to an electronic expansion valve for a cooling and heating system, and more specifically, to an electronic expansion valve for a cooling and heating system that is not affected by the pressure of the refrigerant during bypass.

Recently, due to the high efficiency of refrigeration and air conditioning systems, the emergence of inverter-driven capacity air conditioners, and multi-type air conditioning systems, the purpose is to improve the refrigerant flow control characteristics of the expansion valve and expand the flow control range in accordance with wide capacity changes and requirements for operating conditions. Various electronic expansion valves that can electrically vary flow resistance have been developed and put into practical use.

The main components of this electronic expansion valve are a needle and orifice that constitute the cross-sectional area of the refrigerant passage passage, and a stepping motor that moves the needle. It is composed of a rotor, a stator, and a screw portion that fixes the needle's fixed position.

As known in Korean Patent Registration No. 10-2139095, the electronic expansion valve for a conventional cooling and heating system (heat pump cycle) includes a stepping motor unit equipped with a needle that moves in a straight direction while rotating forward and reverse according to the supply of power. ; In addition to being assembled at the lower part of the stepping motor unit, a first inlet and outlet provided on one side and a second inlet and outlet provided on the other side are formed in the axial direction to control the refrigerant flow rate during cooling and heating according to the movement amount of the needle. It has a body connected through a passage and a second passage, and a first toilet seat formed at the axial center of the valve body installed in the first passage controls the refrigerant flow rate during cooling in the first movement range of the needle, and the valve The second toilet seat installed on the upper part of the sieve controls the refrigerant passage during heating in the second movement range of the needle, and the second flow valve member installed in close contact with the second toilet seat allows the needle to move up and down in the direction of the central axis. A through hole is formed, and the second flow path valve member in the closing direction of the second toilet seat is in close contact with the valve body by a pressing member installed between the second flow path valve member and the adapter fastened to the upper part of the body. In addition to being pressurized, the driving part installed at the predetermined position of the needle presses the second flow path valve member to the upper part in the axial direction away from the valve body, which is the opening direction of the second toilet seat, so that the driving part moves in the axial direction of the second flow valve member. A back pressure chamber configured to open the second toilet seat as the second flow path valve member is lifted in close contact with the lower part, and where the pressure member and the second flow path valve member are installed between the body and an adapter fastened to the upper part of the body. It includes a valve portion provided with a refrigerant passage through which refrigerant can flow through the second flow valve member and the valve body between the first inlet and outlet.

Therefore, not only is a large-diameter second flow path valve member used to increase the flow rate of refrigerant, but the second flow valve member is not subjected to the force of refrigerant pressure, so that the refrigerant passage can be opened and closed under high-pressure refrigerant with a small driving force. .

This conventional electronic expansion valve for heating and cooling systems expands as the needle opens and closes the orifice, and when the needle rises, the E-ring-shaped driving part rises and lifts the second flow valve member upward, thereby opening the auxiliary flow path. When the refrigerant enters through the first passage and fills the area where the pressurizing member is located, pressure acts from the upper surface of the second passage valve member to the lower part, and in addition to the pressure of the pressurizing member, the pressure of the second passage valve member is increased. There was a problem in that the pressure acting on the upper surface was added and the load was increased when the needle moved upward during the pipe pass according to the requirements of the system.

Reference: Republic of Korea Patent Registration No. 10-2139095 Title of invention ‘Electronic expansion valve for cooling and heating system’.

The present invention was devised to solve the above-mentioned requirements, and is a cooling and heating system that is assembled so that the upper and lower parts of the spool valve are subjected to the same pressure, so that it is not affected by the pressure of the refrigerant when moving to the lower part of the spool valve part during bypass. The purpose is to provide an electronic expansion valve for the system.

The electronic expansion valve for a cooling and heating system according to the present invention to achieve the above object includes a valve assembly groove formed at a certain depth from the top to the bottom, a refrigerant inlet formed perpendicular to the valve assembly groove, and a refrigerant inlet. An expansion port through which the incoming refrigerant is discharged to the outside through the valve assembly groove, a check valve assembly groove into which the check valve part is assembled so that refrigerant flows into the valve assembly groove from the outside, and the valve is installed at the same height as the position of the check valve assembly groove. A body having a flow path of a bypass hole formed to discharge refrigerant to the outside through an assembly groove, a body portion including a first valve fitted into the valve assembly groove and provided with an orifice in the axial direction, and fitted into the orifice; In addition, a needle movable in the axial direction, a needle cap assembled on the upper part of the needle, a needle portion including a spring fitted in the upper part of the needle cap, and axially fitted in the upper part of the first valve, In addition, there is a second valve with a bypass hole formed through the outer peripheral surface, and a second valve is inserted axially at the bottom of the second valve and moves downward at the same time as the rod part moves downward, opening the bypass hole and following the upward movement of the rod part. A spool valve part that rises with the force of the spring of the needle part to close the bypass hole, and a spool stopper part that is axially fitted at the top of the second valve to prevent the spool valve part from rising further upward. An adapter part equipped with a valve part, an adapter fastened to the upper part of the second valve and the upper part of the body so that the lower part is accommodated in the body, a magnet guide fixed to the upper part of the adapter, and an adapter part equipped with a magnet guide fixed to the upper part of the adapter part. A magnet part is fitted and rotatably installed, one end is assembled at the axial center of the magnet part and can move in the axial direction at the same time as the magnet part rotates as power is applied, and the other end has a rod part fastened to the axial center of the needle part. , a magnet cap that blocks and supports one end of the magnet in a state in which the rod portion is assembled to one end of the magnet portion, a sleeve that is fixed to the upper part of the adapter portion to surround the magnet cap and the magnet portion, and is seated and fixed to the upper portion of the body. It includes a mold portion that allows the magnet portion to rotate when power is applied.

The second valve, which constitutes the electronic expansion valve for a cooling and heating system according to the present invention, has a spool valve assembly hole formed at one end so that the spool valve part is inserted into the center of the shaft, and a spool stopper whose diameter is enlarged from the spool valve assembly hole at the center of the shaft at the other end. A spool stopper assembly hole formed to fit and seat the unit, an adapter assembly male thread formed on the outer peripheral surface of the spool stopper assembly hole and assembled to the adapter, and a sealing inclined portion inclined and enlarged on the inner peripheral surface of the end of the spool valve assembly hole. , a valve assembly portion that is stepped and assembled on the outer peripheral surface of the end of the spool valve assembly hole and is fitted with the first valve, and a plurality of bypass holes formed through the outer peripheral surface from the spool valve assembly hole.

The spool valve part constituting the electronic expansion valve for a cooling and heating system according to the present invention is inserted into the spool valve assembly hole and can move in the axial direction and open and close the bypass hole, as well as being vertical to the axial direction on the inner surface. A spool valve having a thin partition wall, a rod fitting hole formed at the axis center of the partition, a flow passage hole formed in the partition but formed around the rod fitting hole, and a spool valve fitted on the outer peripheral surface of the spool valve. In addition to the load, it includes a spool valve sealing member that is in close contact with the sealing inclined portion and seals the inner peripheral surface of the second valve and the outer peripheral surface of the spool valve portion.

The rod part, which constitutes the electronic expansion valve for a cooling and heating system according to the present invention, includes a spiral member fastened to the axial center of the magnet portion and moved up and down, a rod fixing member inserted into and fixed to the axial center of the spiral member, and A first screw portion of one end is fastened to the axial center of the rod fixing member, and a second screw portion of the other end is fastened to the needle portion, while a rod is extended from the first screw portion to a predetermined length on the side assembled with the rod fixing member. A regular polygonal pillar part is provided to be caught at the top of the fitting hole, and the part that extends a certain length from the second screw part fastened to the needle part and is integrally connected to the regular polygonal pillar part is made of a cylinder part with a diameter smaller than the cross section of the regular polygon. It includes a rod member fitted so as to pass through the fitting hole.

A check valve part is assembled in the check valve assembly groove constituting the electronic expansion valve for a cooling and heating system according to the present invention, and the check valve part includes a core stopper axially inserted into the check valve assembly groove, and the check valve assembly groove. A compression spring that is axially inserted into the center and one end of which is supported by a core stopper, and a core that is axially inserted into the check lab assembly groove and is supported by the repulsion force of the compression spring and selectively blocks the inlet groove of the check valve member. , In addition to being fastened to the check valve assembly groove, it includes a check valve housing in which a check valve connector is assembled at one end at the center of the axis and a connection hole is formed to be selectively blocked by a core at the other end.

As described above, according to the electronic expansion valve for a cooling and heating system according to the present invention, the upper and lower parts of the spool valve are assembled to receive the same pressure, so that they are not affected by the pressure of the refrigerant when moving to the lower part of the spool valve part during bypass. There is.

1 is a front view of an electronic expansion valve for a cooling and heating system according to an embodiment of the present invention;
Figure 2 is a plan view of Figure 1;
Figure 3 is a right side view of Figure 1;
Figure 4 is a left side view of Figure 1;
Figure 5 is a rear view of Figure 1;
Figure 6 is an exploded perspective view of Figure 1;
Figure 7 is a cross-sectional view taken along line A-A of Figure 4;
Figure 8 is a cross-sectional view taken along line B-B of Figure 5;
Figure 9 is a cross-sectional view showing the state converted from the state of Figure 7 to expansion;
Figure 10 is a cross-sectional view showing a state converted from the state of Figure 7 to the bypass state;
11 is a perspective view showing the rod member of the present invention;
Figure 12 is a perspective view showing the spool valve portion of the present invention;
13 is a perspective view showing the second valve of the present invention;
14 is a perspective view showing the bracket of the present invention;
Figure 15 is a perspective view of the core constituting the check valve part of the present invention;
Figure 16 is a rear perspective view of Figure 15;
17 is a perspective view showing the core stopper of the present invention;
Figure 18 is a rear perspective view of Figure 17.

Hereinafter, an electronic expansion valve for a cooling and heating system according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

In adding quotation marks to the components of the drawings, the same components are given the same symbols as much as possible even if they are shown in different drawings, a known function that is judged to unnecessarily obscure the gist of the present invention. and detailed description of the configuration is omitted. Additionally, directional terms such as 'top', 'bottom', 'front', 'back', 'front', 'front', 'back', etc. are used in connection with the orientation of the disclosed drawing(s). Since components of embodiments of the present invention can be positioned in various orientations, the term directional is used for illustrative purposes and is not limiting.

The electronic expansion valve 1000 for a cooling and heating system according to an embodiment of the present invention includes a body portion 1100, a needle portion 1200, and a valve portion 1300, as shown in FIGS. 1 to 18. , an adapter part 1400, a magnet part 1500, a rod part 1600, a magnet cap 1700, a sleeve 1800, and a mold part 1900.

Here, the body portion 1100 is composed of a body 1110 and a first valve 1120, and the body 1110 has a valve assembly groove 1111 formed at a certain depth from top to bottom, and this valve assembly. A refrigerant inlet (1112) formed vertically in the groove, an expansion port (1113) through which the refrigerant entering the refrigerant inlet is discharged to the outside through the valve assembly groove, and a check valve unit to allow refrigerant to flow into the valve assembly groove from the outside. It is equipped with a check valve assembly groove 1114 into which (1130) is assembled, and a flow path of a bypass hole 1115 formed to discharge refrigerant to the outside through the valve assembly groove at the same height as the position of the check valve assembly groove. .

In addition, the first valve 1120 is fitted into the valve assembly groove 1111 and is provided with an orifice 1121 in the axial direction.

Therefore, during expansion, the refrigerant enters the refrigerant inlet 1112 and goes out through the expansion port 1113, and then flows in through the check valve part 1130 installed in the check valve assembly groove 1114 and bypass hole ( 1115), and during bypass, the refrigerant entering the refrigerant inlet 1112 passes through the first valve 1120 and the spool valve part 1320 of the valve part 1300 into the second valve 1310. It is discharged through the bypass hole 1316 and into the bypass hole 1115.

And the check valve unit 1130 includes a core stopper 1131 axially inserted into the check valve assembly groove 1114, and one end of the check valve assembly groove 1114 axially inserted into the core stopper. A compression spring 1132 to be supported, and a core 1133 that is axially inserted into the check lab assembly groove 1114 and supported by the repulsion force of the compression spring 1132, and to selectively block the inflow groove of the check valve member. In addition to being fastened to the check valve assembly groove 1114, a check valve connector is assembled at one end at the center of the axis, and a connection hole 1134 is formed at the other end to be selectively blocked by the core 1133. Includes housing 1135.

Therefore, the core stopper 1131, the compression spring 1132, the core 1133, and the check valve housing 1135 are sequentially assembled in the check valve assembly groove 1114, so that they can be assembled integrally with the body 1110. .

Here, the core stopper 1131 has a plurality of flow paths 1131b formed on the bottom surface 1131a and a plurality of guide grooves formed at a certain depth from top to bottom in a cylindrical pipe portion 1131c integrally extending from the bottom surface. (1131d) is formed.

Therefore, when the core 1133 is pushed out by the elastic force of the compression spring 1132 or moves toward the core stopper 1131 while pressing the compression spring 1132 by the pressure of the refrigerant, the core 1133 is moved through the guide groove 1131d. ) is guided and can move in the axial direction.

And the core 1133 has a sealing part 1133a that can selectively block the connection hole 1134 of the check valve housing 1135, and a sealing part 1133a that protrudes on the opposite side of the sealing part so that the compression spring 1132 is inserted. It includes a protrusion 1133b and a guide 1133c that protrudes from the outer peripheral surface between the sealing part 1133a and the protrusion 1133b and is inserted into a guide groove 1131d to be guided.

Therefore, according to the pressure of the refrigerant applied to the core 1133, the guide 1133c moves along the guide groove 1131d against the elastic force of the compression spring 1132, and at the same time, the sealing portion 1133a is moved to the check valve housing. While the connection hole 1134 of (1135) can be selectively blocked, it also functions as a check valve to prevent refrigerant from being discharged due to pressure in the opposite direction.

And the needle portion 1200 includes a needle 1210 that is inserted into the orifice 1121 and can move in the axial direction, a needle cap 1220 assembled on the upper part of the needle, and a needle cap 1220 of the needle cap. It includes a spring 1230, one end of which is inserted and supported at the upper part, and the other end of which is supported at the lower part of the valve unit 1300.

Therefore, when the rod unit 1600 moves downward, the needle 1210 synchronously moves in the center direction of the upper and lower axes to open or close the orifice 1121, while the rod unit 1600 When moving downward, the spool valve part 1320 constituting the valve part 1300 is pressed and moved downward, and at the same time, the bypass hole 1316 of the second valve 1310 is opened and the bypass hole 1115 ), while the external pressure applied to the spool valve unit 1320 is removed, the spool valve unit 1320 rises due to the elastic force of the spring 1230 and comes into close contact with the lower part of the spool stopper unit 1330. As this happens, sealing is achieved.

In addition, the valve unit 1300 includes a second valve 1310 that is axially fitted to the upper part of the first valve 1120 and has a bypass hole 1316 formed on its outer circumferential surface. It is inserted in the axial direction at the bottom and moves downward at the same time as the rod part 1600 moves downward to open the bypass hole, and as the rod part moves upward, it rises with the force of the spring of the needle part to close the bypass hole. It includes a spool valve part 1320 and a spool stopper part 1330 fitted axially at the top of the second valve to prevent the spool valve part 1320 from rising further upward.

Therefore, as the spool valve unit 1320 moves up and down in the axial direction at the axis center of the second valve 1310, the bypass hole 1316 is opened and closed, and the refrigerant is bypassed, and the spool valve unit ( Since the pressure is balanced at the top and bottom of the spool valve unit 1320, no additional load is generated when the spool valve unit 1320 moves up and down in the axial direction, thereby prolonging the life of the valve, while the spool stopper unit 1330 When the upper part of the spool valve part 1320 comes into close contact with the lower surface of the spool valve part 1320, sealing is achieved without further elevation, while the lower part of the spool valve part 1320 is connected to the inner diameter lower surface of the second valve 1310. It becomes sealed.

Here, the second valve 1310 has a spool valve assembly hole 1311 formed at one end so that the spool valve portion 1320 is inserted into the center of the shaft, and a spool stopper portion whose diameter is enlarged from the spool valve assembly hole at the center of the shaft at the other end. A spool stopper assembly hole 1312 formed to be seated, an adapter assembly male thread 1313 formed on the outer peripheral surface of the spool stopper assembly hole and assembled to the adapter 1410, and an inclined inner peripheral surface of the end of the spool valve assembly hole. A sealing inclined portion 1314 that is enlarged and enlarged, a valve assembly portion 1315 that is stepped on the outer peripheral surface of the end of the spool valve assembly hole and is fitted with the first valve, and is formed through the outer peripheral surface in the spool valve assembly hole 1311. A plurality of bypass holes 1316 are formed.

Accordingly, the spool valve part 1320 is inserted into the spool valve assembly hole 1311, the spool stopper part 1330 is inserted and seated into the spool stopper part assembly hole 1312, and the adapter assembly male screw part 1313. While the adapter 1410 is assembled, the spool valve sealing member 1322, which will be described later, of the spool valve portion 1320 is closely adhered to the sealing inclined portion 1314, thereby selectively sealing the valve assembly portion 1315. is inserted and welded to the upper part of the first valve 1120, and when the bypass hole 1316 is opened, the refrigerant can be discharged.

In addition, the spool valve unit 1320 is inserted into the spool valve assembly hole 1311 and can move in the axial direction to open and close the bypass hole 1316, as well as having a thin inner surface perpendicular to the axial direction. A spool valve ( 1321) and is inserted into the outer peripheral surface of the spool valve 1321 and is in close contact with the sealing inclined portion 1314 so that sealing is performed on the inner peripheral surface of the second valve 1310 and the outer peripheral surface of the spool valve portion 1320. Includes a spool valve sealing member 1322.

Therefore, the spool valve 1321 is inserted into the spool valve assembly hole 1311 and moves in the axial direction to selectively open and close the bypass hole 1316, as well as the spool valve 1321 formed at the axial center of the partition 1321a. As the rod member 1630 is inserted through the rod fitting hole 1321b, the refrigerant can flow upward and downward through the flow passage hole 1321c, while the spool valve sealing member 1322 It is in close contact with the sealing inclined portion 1314, so that sealing is performed on the inner peripheral surface of the second valve 1310 and the outer peripheral surface of the spool valve unit 1320.

Meanwhile, the adapter part 1400 is fastened to the upper part of the second valve 1310 and is fastened to be sealed to the upper part of the body 1110, and the lower part is connected to the valve assembly groove 1111 of the body 1110. It is equipped with an adapter 1410 accommodated in and a magnet guide 1420 fixed to the top of the adapter.

Accordingly, the magnet guide 1420 is fixed to the upper part of the body 1110 via the adapter 1410, so that the magnet portion 1500 can be rotatably inserted.

In addition, the magnet unit 1500 is installed to be rotatable by being inserted into the upper part of the magnet guide 1420 constituting the adapter unit 100.

Therefore, when the magnet unit 1500 is assembled with the mold unit 1900 at the upper part of the body 1110, the magnet unit 1500 rotates the magnet guide 1420 when power is applied to the mold unit 1900. It rotates around the center.

In addition, the rod unit 1600 has one end assembled to the axial center of the magnet unit 1500 and can move in the axial direction simultaneously with the rotation of the magnet unit as power is applied, and the other end has a needle unit 1200. It is fastened to the center of the axis.

Therefore, as the magnet part 1500 rotates and moves up and down in the axial direction, the needle part 1200 moves up and down to open and close the orifice 1121, while the spool valve part 1320 is pressed downward to open the bypass hole 1316 of the second valve 1310 so that the refrigerant is bypassed, and when the load unit 1600 rises, the external force applied downward to the spool valve unit 1320 This is removed and the spool valve unit 1320 rises due to the elastic force of the spring 1230 to close the bypass hole 1316.

Here, if the rod unit 1600 is described in more detail, a spiral member 1610 is fastened to the axial center of the magnet unit 1500 and moves up and down, and a spiral member 1610 is fixed and inserted into the axial center of the spiral member. One end of the first screw part 1631 is fastened to the rod fixing member 1620 and the axial center of the rod fixing member, and the other end of the second screw part 1632 is fastened to the needle part 1200. The side assembled with the fixing member 1620 is provided with a regular polygonal pillar part 1633 that extends from the first screw part to a certain length and is caught at the top of the rod fitting hole 1321b, and is fastened to the needle part 1200. The portion that extends from the second screw portion 1632 to a certain length and is integrally connected to the regular polygonal column portion is made of a cylindrical portion 1634 with a diameter smaller than the cross section of the regular polygon and is a rod member inserted so as to pass through the rod fitting hole 1321b. (1630).

Therefore, when the magnet unit 1500 rotates, the spiral member 1610 moves up and down, and at this time, the rod fixing member 1620 fixed to the spiral member also moves up and down synchronously, while the rod member ( At the same time that 1630 moves downward, the spool valve part 1320 moves downward by the regular polygonal pillar part 1633.

In addition, the magnet cap 1700 blocks and supports one end of the magnet unit 1500 when the rod unit 1600 is assembled to one end.

Therefore, the magnet cap 1700 supports the magnet portion 1500 so that it becomes the upper center of rotation when it rotates.

Additionally, the sleeve 1800 is fixed to the upper part of the adapter unit 1400 to surround the magnet cap 1700 and the magnet unit 1500.

Therefore, the sleeve 1800 serves as an axis on which the mold part 1900 is inserted and serves as a guide so that the magnet part 1500 can rotate.

In addition, the mold part 1900 is seated and fixed on the upper part of the body 1110 and has a coil wound inside so as to rotate the magnet part 1500 when power is applied, while a bracket 1910 is placed at the bottom. ) is inserted and fixed with a fixing means such as a bolt, and the protrusion 1911 of the bracket 1910 is removably fitted to the side of the body 1110.

Therefore, as the mold part 1900 is fitted into the sleeve 1800 assembled to protrude from the upper part of the body 1110, the protrusion 1911 of the bracket 1910 is separated into the groove 1110a formed on the upper part of the body 1110. It can be detachably fixed without a fastening means such as a bolt.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters stated in the claims, and those skilled in the art can improve and change the technical idea of the present invention into various forms. Therefore, if such improvements and changes are obvious to a person of ordinary skill in the art, they will fall within the scope of protection of the present invention.

1000: Electronic expansion valve for heating and cooling system 1100: Body part
1110: Body 1120: First valve
1130: Check valve part 1200: Needle part
1210: Needle 1220: Needle cap
1230: spring 1300: valve part
1310: Second valve 1320: Spool valve part
1330: Spool stopper part 1400: Adapter part
1410: Adapter 1420: Magnet guide
1500: Magnet part 1600: Rod part
1610: Spiral member 1620: Rod fixing member
1630: Rod member 1700: Magnet cap
1800: sleeve 1900: mold part

Claims (5)

A valve assembly groove formed at a certain depth from top to bottom, a refrigerant inlet formed perpendicular to the valve assembly groove, an expansion port through which the refrigerant entering the refrigerant inlet is discharged to the outside through the valve assembly groove, and a valve assembly groove from the outside. A body 1110 having a check valve assembly groove in which the check valve part is assembled to allow refrigerant to flow in, and a bypass hole flow path formed to discharge refrigerant to the outside through the valve assembly groove at the same height as the position of the check valve assembly groove; In an electronic expansion valve for a cooling and heating system in which a mold part 1900 is assembled on the upper part of a body part 1100 including a first valve 1120 fitted into the valve assembly groove and provided with an orifice 1121 in the axial direction. ,
A needle portion (1200) equipped with a needle (1210) fitted into the orifice (1121) and movable in the axial direction,
A second valve 1310 is axially inserted into the upper part of the first valve 1120 and has a bypass hole 1316 formed on its outer peripheral surface, and a rod portion (1310) is axially inserted from the lower part of the second valve. 1600), the bypass hole 1316 opens at the same time, and the spool valve unit 1320 rises according to the upward movement of the rod unit to close the bypass hole, and the axis at the top of the second valve. A valve unit 1300 equipped with a spool stopper unit 1330 that is inserted in the direction to prevent the spool valve unit 1320 from rising further upward,
An adapter 1410 that is fastened to the upper part of the second valve and is fastened to the upper part of the body so that the lower part is accommodated in the body, and an adapter part 1400 equipped with a magnet guide 1420 fixed to the upper part of the adapter,
A magnet unit 1500 fitted and rotatably installed on the upper part of the adapter unit 1400,
As one end is assembled to the axial center of the magnet unit and power is applied, the spool valve unit 1320 can be moved in the downward direction of the axial center at the same time as the magnet unit rotates, and the other end is a rod part fastened to the axial center of the needle unit ( 1600) Electronic expansion valve for heating and cooling systems. According to clause 1,
The second valve 1310 is,
At one end, a spool valve assembly hole 1311 is formed to fit the spool valve portion 1320 at the center of the shaft, and at the other end, a spool stopper assembly hole 1312 is formed at the center of the shaft with a diameter larger than that of the spool valve assembly hole so that the spool stopper portion is inserted and seated. ), an adapter assembly male thread portion 1313 formed on the outer peripheral surface of the spool stopper assembly hole and assembled to the adapter 1410, and a sealing inclined portion 1314 that is inclined and enlarged on the inner peripheral surface of the end of the spool valve assembly hole. , a valve assembly portion 1315 stepped on the outer peripheral surface of the end of the spool valve assembly hole and fitted with the first valve, and a plurality of bypass holes 1316 formed through the outer peripheral surface from the spool valve assembly hole 1311. An electronic expansion valve for a cooling and heating system, characterized in that. According to clause 2,
The spool valve unit 1320,
A partition wall portion 1321a that is inserted into the spool valve assembly hole 1311 and is capable of moving in the axial direction and opening and closing the bypass hole 1316, as well as being formed with a thin thickness perpendicular to the axial direction on the inner surface, A spool valve 1321 having a rod fitting hole 1321b formed at the axial center of the diaphragm part and a passage through hole 1321c formed in the diaphragm part but formed through the periphery of the rod fitting hole, and the spool valve 1321 It includes a spool valve sealing member 1322 that is inserted into the outer peripheral surface and is in close contact with the sealing inclined portion 1314 to seal the inner peripheral surface of the second valve 1310 and the outer peripheral surface of the spool valve portion 1320. An electronic expansion valve for a cooling and heating system, characterized in that. According to clause 1,
The load unit 1600,
A helical member 1610 fastened to the axial center of the magnet portion 1500 to move up and down, a rod fixing member 1620 inserted into and fixed to the axial center of the helical member, and the axial center of the rod fixing member One end of the first screw part 1631 is fastened to the needle part 1200, and the other end of the second screw part 1632 is fastened to the needle part 1200, while the first screw part 1632 on the side assembled with the rod fixing member 1620 is fixed to the needle part 1200. A regular polygonal pillar part 1633 is provided that extends in length and is caught at the top of the rod fitting hole 1321b, and extends a certain length from the second screw part 1632 that is fastened to the needle part 1200 to form a regular polygonal pillar part. The part integrally connected with the cylindrical portion 1634 with a diameter smaller than the cross section of a regular polygon is comprised of a rod member 1630 fitted so as to pass through a rod fitting hole 1321b. valve. According to clause 1,
The check valve unit 1130,
A core stopper 1131 axially fitted into the check valve assembly groove 1114, a compression spring 1132 fitted axially into the check valve assembly groove 1114 so that one end is supported by the core stopper, A core 1133 that is axially inserted into the check valve assembly groove 1114 and supported by the repulsive force of the compression spring 1132 and selectively blocks the inflow groove of the check valve member, and the check valve assembly groove 1114 In addition to being fastened to the center of the axis, a check valve connector is assembled at one end and a connection hole 1134 is formed at the other end to be selectively blocked by the core 1133. For a cooling and heating system including a check valve housing 1135. Electronic expansion valve.

Images