KR20170126673A - Valve being used as both check valve and electronic expansion valve, cooling and heating system, and heat pump system - Google Patents

Abstract

The present invention relates to an electronic expansion valve used as a check valve, a cooling and heating system, and a heat pump system. The provided electronic expansion valve used as a check valve comprises: a main body housing including a first port which is formed on an edge of a lower side and through which a fluid comes in and out, and a second port which is formed on an edge of an upper side of the first port and through which a fluid comes in and out; a working load assembly installed on an upper space in the main body housing, and provided with a lifting rod that is lifted; an orifice assembly installed on a lower space in the main body housing, blocking an orifice hole when the lifting rod ascends, and opening the orifice hole when the lifting rod descends to form a flow path between the first port and the second port so as to perform a function of an expansion valve; and a check valve switching unit installed on an annular spaced space between an edge of the orifice assembly and the inside of the main body housing, blocking flow of a fluid introduced through the first port through the annular spaced space, and allowing flow of a fluid introduced through the second port through the annular spaced space so as to perform a function of a check valve. The function of the check valve is performed when the orifice hole is blocked by ascent of the lifting rod. Also, the present invention provides a cooling and heating system and heat pump system including the electronic expansion valve used as a check valve.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic expansion valve, a heating / cooling system, and a heat pump system,

The present invention relates to an electronic expansion valve serving as a check valve, an air conditioning and heating system, and a heat pump system. More particularly, the present invention relates to an electronic expansion valve serving as both a check valve capable of performing functions of an electronic expansion valve and a check valve according to a flow direction of a fluid, and a cooling and heating system and a heat pump system using the same.

In general, valves are used to block fluid flow or to flow fluid. An expansion valve is a valve for reducing the pressure of a high-pressure fluid to a low pressure. Generally, it is used for discharging a high-temperature and high-pressure refrigerant at a low temperature and a low pressure in a cooling / heating air conditioner such as a high efficiency heat pump, an air conditioner and the like.

The electronic expansion valve of the expansion valve normally controls the degree of opening of the orifice by driving the stepping motor so as to control the refrigerant discharge amount or the inflow amount flowing into the valve chamber in some cases. In the electronic expansion valve, the needle or rod is lifted and lowered by rotation of the built-in step motor to open / close the refrigerant oil / gas inlet / outlet of the orifice. In a step motor, a rotor is driven by a coil to rotate in the forward and reverse directions, and the rotary motion is converted into a vertical movement of the shaft rod or the needle. The needle connected to the shaft rod moves up and down to control the opening degree of the orifice of the electronic expansion valve to control the flow rate of the refrigerant in the valve.

At this time, since the conventional electronic expansion valve has the orifice structure, it is difficult to maintain only the flow of the refrigerant in one direction and to perform the function of the two-way valve.

Therefore, in order to perform the function of the expansion valve in the forward flow and to perform the function of the check valve in the reverse flow, normally two pipes are formed, and each pipe is provided with an expansion valve and a check valve to selectively operate the two pipes .

Korean Utility Model Laid-Open Publication No. 20-1998-0060715 (published on November 5, 1998) Korean Patent Publication No. 10-2005-0037262 (published on April 21, 2005)

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and an electronic expansion valve serving as both a check valve and a check valve capable of performing functions of an electronic expansion valve and a check valve according to a flow direction of a fluid is proposed.

According to one aspect of the present invention, there is provided a fluid supply device including a first port formed around a lower side of a fluid inlet and outlet, a second port formed around an upper side of the first port, housing; A working rod assembly installed in an upper space in the main body housing and having a lifting rod for lifting and lowering; And a flow path between the first port and the second port is formed by opening the orifice hole when the lifting rod is lowered to perform the function of the expansion valve Orifice assembly; And an annular spaced space between the perimeter of the orifice assembly and the interior of the body housing for blocking flow through the annular spaced space of fluid entering through the first port and through the annular spaced space of fluid entering through the second port. And a check valve switching unit that performs a check valve function while permitting the flow of the check valve. The check valve function is performed when the orifice hole is blocked by the rise of the lifting rod.

At this time, in one example, the check valve switching unit includes: an annular valve seat provided in an annular spacing space between the first port and the second port and having at least one check valve hole penetrating the upper and lower portions along the annular shape; A check valve spring provided around the orifice assembly on the underside of the annular valve seat; And a hermetically sealed portion which is supported at one end by a check valve spring around the orifice assembly and performs shutoff and opening of the check valve hole in accordance with the pressure difference between the upper portion and the lower portion.

In yet another example, the annular valve seat has an annular inner groove formed along the inner surface facing the periphery of the orifice assembly, and an annular outer groove formed along the outer surface facing the inner side of the body housing, The valve switching unit may further include an inner sealing ring inserted in the annular inner groove and sealing the orifice assembly, and an outer sealing ring inserted in the annular outer groove to maintain the airtightness with the body housing.

Further, at this time, in another example, the one end of the check valve spring is supported on the lower end cover portion of the main body housing, the hermetic retaining portion includes a center hole through which the orifice assembly penetrates, And an airtight sheet formed on an upper surface of the annular blade portion to maintain airtightness at the time of lowering the check valve hole, wherein the annular valve seat has an assembly insertion hole formed by an inner surface, And a vertical protrusion which is vertically protruded to have an inner diameter larger than the side and forms an annular groove around the orifice assembly together with the outer surface of the orifice assembly.

According to another embodiment of the present invention, the actuating rod assembly includes a guide hole for guiding the non-rotating up and down movement through the lifting rod at an upper end thereof, a lower end inserted into the annular groove, And a head portion protruding in the horizontal direction around the upper end of the lifting rod when the lifting rod is lowered is caught on the upper peripheral surface of the guide hole and the maximum falling range is limited.

In another example, the orifice assembly includes: an orifice housing having at least one housing through-hole peripherally and an orifice hole at the top; An orifice spring disposed within the orifice housing; And an orifice holder which is installed in the orifice housing and is elastically supported by an orifice spring and which is opened and shut by opening and closing of the orifice hole by a pressing force caused by the descent of the lifting rod and an elastic force of the orifice spring, And is interchangeably inserted into the lower space.

In yet another example, the orifice assembly further includes an assembly cap that supports the lower end of the orifice spring and blocks the lower end of the orifice housing, the orifice adjuster having a support portion resiliently supported on the upper end of the orifice spring, A tapered portion for closing the lower side of the orifice hole at the time of climbing and an upwardly protruding portion protruding from the upper side of the tapered portion and passing through the orifice hole and having a receiving groove for receiving the tip of the lifting rod on the upper surface of the upwardly directed portion.

Further, in one example, the working rod assembly includes: a motor for providing a lifting power of the lifting rod; And a shaft rod having a male thread formed around the shaft and rotating in accordance with the rotation of the motor to move the lift rod up and down. The shaft lift rod is open to the upper side and has a female threaded shaft insertion groove. And is lifted and lowered in a non-rotating manner in accordance with the rotation of the shaft rod inserted into the shaft insertion groove.

In another example, the upper portion of the lifting rod is formed so as to protrude in the horizontal direction around the upper end, and the lower end of the lifting rod has a downwardly projecting downwardly projecting portion. The working rod assembly includes a motor, Further comprising: an assembly housing for receiving an upper portion of the lifting rod; and a speed reducer connected to the motor for transmitting a reduced rotation to a shaft rod connected to the lower side by decelerating the rotation of the motor, wherein the assembly housing has a shaft A step is formed so as to form a hole, a reduction gear is accommodated in a space above the step, the upper portion of the lift rod is accommodated in the lower step space, and the upward range of the lift rod is restricted, and the downwardly pointed portion penetrates the orifice hole Press the protruding top and open the orifice hole.

Next, in order to solve the above-mentioned problem, according to another aspect of the present invention, in an air conditioning system having an electronic expansion valve on a piping, an electronic expansion valve is provided, And an electronic expansion valve serving as both a check valve according to one of the first and second embodiments.

Further, in order to solve the above-mentioned problem, according to another aspect of the present invention, in a heat pump system having an electronic expansion valve on a piping, an electronic expansion valve is provided in an embodiment of the above- A heat pump system is proposed which is an electronic expansion valve serving also as a check valve according to any one of the above.

According to one embodiment of the present invention, the function of the electronic expansion valve and the function of the check valve can be respectively performed according to the flow direction of the fluid.

Accordingly, in order to perform the function of the expansion valve and the function of the check valve in accordance with the flow direction of the fluid, the electronic expansion valve serving also as the check valve according to one example of the present invention is used without forming two pipes as in the prior art The piping configuration can be simplified. Further, the installation cost of the system can be reduced accordingly.

It will be understood by those skilled in the art that various other changes and modifications within the scope of the present invention may be made without departing from the spirit and scope of the invention as defined by the appended claims. It is obvious that it can be derived.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1A is a cross-sectional view schematically showing a cross section of a state in which an electronic expansion valve serving as a check valve according to an embodiment of the present invention performs the function of an electronic expansion valve. FIG.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1A is a cross-sectional view schematically showing a cross section of a check valve in an electronic expansion valve serving as a check valve according to an embodiment of the present invention. FIG.
FIG. 2A is a schematic view showing a 1/4 partial cut-away section of a state in which the electronic expansion valve serving as a check valve according to FIG. 1A performs the function of an electronic expansion valve.
FIG. 2B is a view schematically showing a 1/4 part cut-away section of a state in which the electronic expansion valve serving as a check valve according to FIG. 1B performs the function of a check valve.
3 is a view schematically showing a decomposition state of some parts of an electronic expansion valve serving as a check valve according to one example of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the configuration of a first embodiment of the present invention; Fig. In the description, the same reference numerals denote the same components, and a detailed description may be omitted for the sake of understanding of the present invention to those skilled in the art.

In the present specification, when one element forms a coupling relation such as a coupling or coupling or a transmission relation such as transmission or transportation in relation to other elements, there is no 'direct' But also in the form of a coupling relationship or a transferring relation via an intermediary due to a relation of other components between them. The same is true of terms that include the meaning of 'contact' such as 'on', 'above', 'below', or 'below'. In addition, directional terms should be interpreted relative to the reference element.

It should also be noted that, although the present invention may be embodied in the singular, the present invention may be embodied in many other forms without departing from the spirit or scope of the inventions.

Furthermore, the words " comprising, " " comprising ", and the like, and the description of terms derived therefrom, are used in the present specification to indicate the possibility of adding, combining, or combining one or more other elements with the original element And does not exclude the use of the term " comprise ", the word " comprises ", and the words derived therefrom are also intended to be added to the original element or elements in addition to one or more other elements, Shall not preclude the possibility of the addition or combination of one or more of the other elements provided that the original elements or elements do not lose their features, functions and / or properties.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which: FIG.

An electronic expansion valve serving as a check valve according to one embodiment of the present invention will be described in detail with reference to the drawings. Here, reference numerals not shown in the drawings to be referred to may be reference numerals in other drawings showing the same configuration. It should be noted that the configurations disclosed in the respective drawings may be omitted or modified in accordance with variations of the embodiments.

FIG. 1A is a cross-sectional view schematically showing a cross-section of a state in which an electronic expansion valve serving as an electronic expansion valve serving as a check valve according to an embodiment of the present invention performs the function of an electronic expansion valve. FIG. 1A is a cross- 2A is a cross-sectional view schematically showing a state in which the electronic expansion valve serving as a valve serves as a check valve. FIG. 2A is a cross-sectional view showing a state in which the electronic expansion valve serving as a check valve according to FIG. Fig. 2B is a schematic view showing a 1/4 partial cut-away section of the electronic expansion valve serving as a check valve and performing the function of a check valve in Fig. 1B, and Fig. 3 is a cross- 1 is a view schematically showing a decomposition state of some parts of an electronic expansion valve serving as a check valve according to an example of the present invention.

1a, 1b, 2a and / or 2b, an electronic expansion valve serving as a check valve according to one example comprises a body housing 10, a working rod assembly 30, an orifice assembly 50 and a check valve switching unit 70). At this time, the main body housing 10 has the first port 10a on the lower side and the second port 10b on the upper side of the first port 10a. The operation rod assembly 30 has a lifting rod 35 installed in an upper space in the main body housing 10 and operated to move up and down. The orifice assembly 50 is installed in the lower space of the main body housing 10 to shut off the orifice hole 51a when the lifting rod 35 is lifted and to open the orifice hole 51a when the lifting rod 35 is lowered, And functions as a valve. And the check valve switching unit 70 is installed in the annular spacing space between the periphery of the orifice assembly 50 and the inside of the main housing 10. [ At this time, the check valve switching unit 70 blocks the flow through the annular spacing space of the fluid flowing through the first port 10a and the flow through the annular spacing space of the fluid flowing through the second port 10b And performs a check valve function. On the other hand, the check valve function is performed when the orifice hole 51a is closed due to the lifting of the lifting rod 35. [

Now, each configuration of an electronic expansion valve serving as a check valve according to one example of the present invention will be described in detail. The main body housing 10, the operation rod assembly 30, the orifice assembly 50, and the check valve switching unit 70, which are basic components of an electronic expansion valve serving as a check valve according to one example, will be sequentially examined.

main body housing (10)

1A, 1B, 2A and / or 2B, the main body housing 10 has a first port 10a formed on the lower side and a second port 10b formed on the upper side of the first port 10a. do. Each of the first port 10a and the second port 10b receives fluid in and out. That is, the fluid may flow through the path between the first port 10a and the second port 10b, or may flow through the path between the second port 10b and the first port 10a. At this time, when the fluid flows through the path between the first port 10a and the second port 10b, the function of the electronic expansion valve can be performed by the check valve electronic expansion valve according to the present invention, The check valve function can be performed by the check valve electronic expansion valve according to the present invention when flowing through the path between the second port 10b and the first port 10a.

For example, the first port 10a and the second port 10b may be formed in different directions, or may be formed in the same or similar directions. The position of the second port 10b is higher than that of the first port 10a. At this time, an annular valve seat 71 of a check valve switching unit 70, which will be described later, may be installed between the first port 10a and the second port 10b.

On the other hand, an operation rod assembly 30 is installed in an upper space in the body housing 10, and an orifice assembly 50 is installed in a lower space. For example, the mounting position of the operating rod assembly 30 may be such that the position of the second port 10b is higher than the position of the second port 10b or that the flow hole 36b formed in the operating rod assembly 30, for example, Can be installed. The orifice assembly 50 is interchangeably fastened or coupled at the lower end of the body housing 10 so that the housing through hole 51b of the orifice assembly 50 corresponds to the position of the first port 10a The position of the first port 10a can be determined.

For example, the lower portion of the main body housing 10 can be sealed by inserting orifice assembly 50 therein. That is, a replaceable orifice assembly 50 can be inserted at the bottom of the body housing 10. At this time, the main body housing 10 is provided with the lower end fastening part 13, and the lower end fastening part 13 is hermetically fastened to the lower part of the housing body 11 and the lower end fastening part 13 is fastened by inserting the orifice assembly 50, (13) can be sealed. At this time, the orifice assembly 50, for example, the assembly cap 57 of the orifice assembly 50 is screwed to the lower end fastening portion 13 of the body housing 10 and can be hermetically coupled to the lower end of the body housing 10 have. For example, the lower end fastening portion 13 of the main body housing 10 is at least partially inserted into the lower end portion of the housing body 11 and is welded to the lower end of the housing body 11, for example, as furnace brazing or the like And may be screwed to the assembly cap 57 of the orifice assembly 50, for example, by internal surface threads. In order to seal the assembly cap (57) of the orifice assembly (50) and the lower end fastening portion (13) of the main housing (10), a sealing means such as an O-ring may be provided to maintain airtightness.

For example, in one example, the main housing 10 has a housing cap 15, and the housing cap 15 can be coupled to the top of the housing body 11. For example, a screw thread may be formed around the upper end of the housing body 11, which is formed by machining one pipe, so as to be fastened to the inner surface thread of the housing cap 15. [ Alternatively, the joining portion 15a may be fixed and sealed around the upper end of the housing body 11 by welding, for example, brazing or the like, and the housing cap 15 may be screwed onto the joining portion 15a. At this time, a sealing means such as an O-ring or the like may be provided for sealing between the coupling portion 15a and the housing cap 15 to maintain airtightness.

The housing cap 15 of the main body housing 10 is screwed together with not only the upper end of the housing body 11 but also the protruding portion of the assembly housing 34 protruding from the main housing 10, 11, the assembly housing 34, and the housing cap 15, respectively. The operation rod assembly 30 can be replaced through disengagement of the housing cap 15 and the operation rod assembly 30 before insertion of the housing cap 15 is inserted into the housing body 11 The operation rod assembly 30 can be fixedly coupled to the main body housing 10 by screwing the rear housing cap 15, for example.

For example, the housing cap 15 is bent to cover the upper end of the main housing 10 and / or the upper end of the operating rod assembly 30, and a connector for supplying external power to the motor 31 So that the connecting portion can be formed. At this time, the housing cap 15 may be integrally formed with a connector for supplying external power to the motor 31 in the connector portion of the housing cap 15.

Referring to FIGS. 1A, 1B, 2A and / or 2B, piping is connected to the first port 10a and the second port 10b of the main body housing 10, or a piping connector 110 for piping connection is provided. Can be formed. The piping connector 110 may be fixed to the main body housing 10 by welding or the like and an electronic expansion valve serving as a check valve may be provided on the piping by connecting the piping to the other side of the piping connector 20. At this time, the piping connector 20 may be separate from the main housing 10, or may be a part of the main housing 10.

The main body housing 10 may be made of a metal such as copper or iron, or may be made of an alloy material such as stainless steel, copper, or an iron alloy.

For example, the housing body 11 of the body housing 10 may be formed of a single pipe. In this case, the upper and lower ends of the housing body 11 may have the same diameter or different diameters by drawing. For example, the first port 10a and the second port 10b may be formed on the housing body 11 formed of one pipe.

Operating load  The assembly (30)

Next, referring to FIGS. 1A, 1B, 2A and / or 2B, the operation rod assembly 30 is provided with a lifting rod 35 installed in an upper space in the main body housing 10 and moving up and down. The orifice hole 51a of the orifice assembly 50 to be described later is blocked when the lifting rod 35 is lifted and the orifice hole 51a is opened when the lifting rod 35 is lowered. A charge can be formed from the first port 10a to the second port 10b through the orifice hole 51a in accordance with the opening of the orifice hole 51a as the lifting rod 35 descends. At this time, the electronic expansion valve serving as a check valve according to the present invention operates as an electronic expansion valve.

When the lifting rod 35 is in the lifted state, the orifice hole 51a of the orifice assembly 50 is shut off and the pressure of the fluid at the second port 10b side is lower than that of the first port 10a A flow path that bypasses the orifice hole 51a from the second port 10b and flows to the first port 10a can be formed. At this time, the electronic expansion valve serving as a check valve according to the present invention operates as a check valve.

For example, the lifting power of the lifting rod 35 is provided by a motor 31 described later, and in one example, the lifting rod 35 is lifted up without rotation to shut off and open the orifice hole 51a. For example, the lower end of the lifting rod 35 can press the upper end of the orifice adjuster 55, which protrudes through the orifice hole 51a when lowered, to open the orifice hole 51a.

For example, referring to FIG. 3, the lifting rod 35 may have a head portion 35c and a downwardly projecting portion 35b. The head portion 35c protrudes horizontally around the upper end of the lifting rod 35. Further, it can be formed as a non-circular structure on the horizontal cut surface of the lifting rod 35. [

For example, in one example, the working rod assembly 30 may further include a motor 31 and a shaft rod 33 in addition to the lifting rod 35. [ At this time, the motor 31 provides the lifting power of the lifting rod 35. The lifting and lowering rod 35 is lifted and lowered in accordance with the rotation of the motor 31, so that the flow path can be blocked and opened. For example, the lifting and lowering of the lifting rod 35 can be performed according to the forward / reverse rotation of the motor 31. [ For example, when the motor 31 rotates in the normal direction, the lifting rod 35 is lowered and the lifting rod 35 can be raised or vice versa when the motor 31 rotates in the reverse direction. At this time, the rotation of the motor 31 can be converted into a rectilinear motion, so that the lifting and lowering rod 35 can be lifted and lowered. For example, the lifting and lowering rod 35 can be lifted and lowered without rotation. For example, the lifting rod 35 is engaged with the shaft rod 33 so that the rotational motion of the shaft rod 33 in accordance with the rotation of the motor 31 can be switched to the upward / downward movement of the lifting rod 35. For example, the motor 31 may be a stepping motor.

The shaft rod 33 rotates in accordance with the rotation of the motor 31. At this time, the lifting and lowering rod 35 can be lifted and lowered in accordance with the rotation of the shaft rod 33. The shaft rod 33 rotates in accordance with the rotation of the motor 31 and lifts the lifting rod 35. At this time, the combination of the shaft rod 33 and the lifting rod 35 converts the rotational motion into a linear motion. For example, a male thread is formed around the shaft rod 33 to form a threaded engagement with the lift rod 35, and the rotation of the shaft rod 33 causes the lift rod 35 to move up and down . At this time, the lifting rod 35 is provided with a shaft insertion groove 35a having an inner thread surface and an open upper side, and the shaft rod 33 inserted into the shaft insertion groove 35a is rotated, (35) can move up and down without rotation. At this time, since the horizontal cutting surface of the lifting rod 35 is formed into a non-circular structure, the lifting and lowering can be performed without rotating. For example, the lifting rod 35 whose horizontal cut surface is formed in a non-circular structure is guided by the guide hole 36a of the guide housing 36 and can be raised and lowered without rotation.

1A, 1B, 2A, 2B, and / or 3, according to one example, the actuation rod assembly 30 may further include a guide housing 36. As shown in FIGS. At this time, the guide housing 36 has a guide hole 36a at an upper end thereof and at least one flow hole 36b around the guide hole 36a. The guide hole 36a of the guide housing 36 penetrates the lifting rod 35 and can guide the lifting and lowering of the lifting rod 35. That is, the guide hole 36a is formed as a non-circular structure on the horizontal cut surface corresponding to the cross-sectional shape of the lifting rod 35, so that the lift of the lifting rod 35 is blocked and only the lifting and lowering can be guided. Thus, the lifting and lowering rod 35 can be lifted and lowered along the guide hole 36a without rotation.

On the other hand, when the electronic expansion valve is operated, the fluid that has passed through the orifice hole 51a flows toward the second port 10b through at least one or more flow holes 36b formed around the guide housing 36, The fluid flowing from the second port 10b flows around the upper portion of the orifice assembly 50 through the flow hole 36b and flows through the check valve hole 71a of the check valve switching unit 70, It can flow toward the port 10a side.

The guide housing 36 may also be inserted into an annular groove formed by the outer circumferential surface of the orifice assembly 50 and the annular valve seat 71 of the check valve switching unit 70 which will be described later. At this time, the head portion 35c protruding in the horizontal direction around the upper end of the lifting rod 35 when the lifting rod 35 descends is caught on the upper peripheral surface of the guide hole 36a, and the maximum falling range is limited . For example, the guide housing 36 may be inserted into the lower end portion of the assembly housing 34, which will be described later, and form an operation restriction space of the lifting rod 35 together with the assembly housing 34. For example, the limit of the maximum falling range of the lifting rod 35 by the guide housing 36 is such that the downward-pointed portion 35b of the lifting rod 35 can not open the orifice hole 51a To prevent the result from blocking over.

In addition, in one example, the actuation rod assembly 30 may further include an assembly housing 34 and a speed reducer 32. The assembly housing 34 can house the motor 31, the shaft rod 33 and at least the top of the lifting rod 35. The decelerator 32 is connected to the motor 31 and decelerates the rotation of the motor 31 to transmit the decelerated rotation to the shaft rod 33 connected to the lower side. Referring to FIGS. 1A, 1B, 2A, 2B, and 3, the upper portion of the lifting rod 35 at least accommodated in the assembly housing 34 includes a head portion 35c . For example, the assembly housing 34 has a step 34b formed therein to form a shaft hole 34a through which the shaft rod 33 penetrates, and the reducer 32 is received in the upper space and the lower space 34c The upper portion of the lifting rod 35, that is, the head portion 35c, can be accommodated in the lifting rod 35 and the lifting range of the lifting rod 35 can be limited. For example, the guide housing 36 is screwed to the lower end of the assembly housing 34 and the upper end of the lift rod 35 is fixed by the lower end space 34c of the assembly housing 34 and the upper end surface of the guide housing 36, It is possible to form a restricting space in which the head portion 35c moves up and down. The upper end of the shaft rod 33 is connected to the speed reducer 32 through the shaft hole 34a and the tip portion of the shaft rod 33 protruded downward through the shaft hole 34a is connected to the upper portion of the lift rod 35 The shaft insertion hole 35a can be inserted into the shaft insertion groove 35a.

1A, 1B, 2A, 2B and / or 3, the lower end of the lifting rod 35 may have a downwardly projecting downwardly projecting portion 35b. At this time, the downward-pointed end portion 35b pushes the upper end, for example, the upward-pointed end portion 55a, which protrudes through the orifice hole 51a according to the descent of the lifting rod 35 and opens the orifice hole 51a.

For example, the assembly housing 34 may be hermetically mounted within the body housing 10. The assembly housing 34 may be secured to the interior of the body housing 10 by brazing, for example. At this time, the lower end of the assembly housing 34 is screwed to the guide housing 36 to form a space for restricting the elevating operation of the lifting rod 35. The upper end of the assembly housing 34 is connected to the housing cap 15 And can be hermetically mounted inside the main body housing 10. For example, the lower end of the assembly housing 34 is formed with an internal thread on its inner side, and the upper end of the guide housing 36 is formed with a male thread on its outer side, so that it can be screwed.

For example, the assembly housing 34 may be formed to have a stepped shape and become narrower toward the lower side. At this time, the outer diameter of the uppermost end is matched with the inner diameter of the main body housing 10, and the outer diameter of the outer diameter gradually increases between the inserting section of the motor 31 and the inserting section of the speed reducer 32, Can be reduced.

Orifice  The assembly (50)

Next, the orifice assembly 50 will be described with reference to FIGS. 1A, 1B, 2A, and / or 2B. The orifice assembly 50 is installed in the lower space within the body housing 10. The orifice assembly 50 blocks the orifice hole 51a when the lifting rod 35 is lifted and opens the orifice hole 51a when the lifting rod 35 is lowered to open the first port 10a and the second port 10a, 10b to function as an expansion valve. At this time, the orifice assembly 50 may be interchangeably inserted into the lower space of the main housing 10. For example, the orifice assembly 50 can be screwed into a lower portion of the body housing 10 so that the orifice assembly 50 can be inserted and replaced from the lower side of the body housing 10.

For example, in one example, orifice assembly 50 includes orifice housing 51, orifice spring 53, and orifice adjuster 55. At this time, the orifice assembly 50 may be interchangeably inserted into the lower space of the main housing 10. Further, in one example, the orifice assembly 50 may further include an assembly cap 57.

The orifice housing 51 includes at least one housing through-hole 51b formed in the periphery thereof and an orifice hole 51a formed in the upper portion thereof. At this time, the housing through hole 51b and the orifice hole 51a can form a flow path between the first port 10a and the second port 10b. At this time, the flow path from the first port 10a to the second port 10b through the housing through hole 51b and the orifice hole 51a is formed at the time of the electronic expansion valve function of the electronic expansion valve serving as the check valve according to the present invention Respectively. In the check valve function of the check valve electronic expansion valve according to the present invention, the orifice hole 51a is shut off.

For example, the position of the housing through-hole 51b may be arranged substantially in the same height range as the first port 10a of the main housing 10. The shape of the housing through hole 51b need not be limited to a circular shape, and various shapes are possible.

An orifice spring (53) and an orifice adjuster (55) are provided in the orifice housing (51). For example, the rear end of the orifice housing 51 is blocked by the assembly cap 57 described later.

The orifice spring (53) is installed in the orifice housing (51). The orifice spring (53) resiliently supports the orifice adjuster (55) within the orifice housing (51). For example, one end of the orifice spring 53 is supported by the assembly cap 57 described later, and the other end supports the orifice adjuster 55.

The orifice adjuster 55 is installed in the orifice housing 51 and is elastically supported by the orifice spring 53. The orifice adjuster 55 descends and rises due to the downward force of the lifting rod 35 and the elastic force of the orifice spring 53 to open and shut off the orifice hole 51a. For example, the orifice adjuster 55 retracts downward when the lifting rod 35 is lowered to open the orifice hole 51a, and is lifted by the elastic force of the orifice spring 53 when the lifting rod 35 is lifted, 51a.

The opening of the orifice hole 51a by the orifice adjuster 55 is stopped by the elastic force of the orifice spring 53 in accordance with the rise of the lifting rod 35 due to the reverse rotation or the forward rotation of the motor 31 Or when the motor 31 is driven off the shaft rod 33 idles and the orifice adjuster 55 is lifted by the elastic force of the orifice spring 53 so that the lift rod 35 It can be pushed up.

In one example, the orifice adjuster 55 may comprise a support 55c, a tapered portion 55b, and an upwardly pointed portion 55a. For example, at this time, the support portion 55c, the tapered portion 55b, and the upward-pointed portion 55a may be integrally formed. The support portion 55c is elastically supported on the upper end of the orifice spring 53. [ The tapered portion 55b is formed in the shape of a conical column on the upper side of the support portion 55c and blocks the lower side of the orifice hole 51a when lifted. The upward-pointed end portion 55a protrudes from the upper side of the tapered portion 55b and passes through the orifice hole 51a. For example, the upper end of the upward-pointed portion 55a may be provided with a receiving groove on which the tip of the lifting rod 35 is seated.

At this time, the upward-pointed end portion 55a of the orifice adjuster 55 is pushed down by the downward-pointed portion 35b of the lifting rod 35 when the lifting rod 35 is lowered, The tapered portion 55b integrally formed with the tapered portion 55a is lowered and the lower side of the orifice hole 51a blocked by the tapered portion 55b is opened. For example, the orifice hole 51a is opened and closed when the orifice spring 55 is lowered and lifted due to the descent of the lifting rod 35 and the elastic force of the orifice spring 53, 31, the rotational speed or the forward / reverse rotational speed is controlled and the down / up speed of the orifice adjuster 55 can be controlled. Alternatively, the orifice adjuster 55 can be lowered and elevated step by step using a step motor or the like. Also, in one example, the amount of fluid may be adjusted by stepwise adjusting the descending and ascending / descending height of the orifice adjuster 55 in accordance with the step adjustment.

Next, the assembly cap 57 will be described. In one example, the orifice assembly 50 may further include an assembly cap 57. The assembly cap 57 supports the lower end of the orifice spring 53 and blocks the lower end of the orifice housing 51. For example, the assembly cap 57 may be inserted into the orifice housing 51 to close the lower end of the orifice housing 51. At this time, the assembly cap 57 can be screwed and hermetically engaged with the lower portion of the main body housing 10. As a result, the orifice assembly 50 can be inserted and replaced from the lower side of the main body housing 10.

In addition, the assembly cap 57 can be engaged with the body housing 10 as well as the lower end of the orifice housing 51. The assembly cap 57 is threadedly engaged with the lower portion of the body housing 10 and the orifice assembly 50 can be detached from the body housing 10 according to the disengagement. For example, the orifice assembly 50 may be coupled to the body housing 10 and detached from the lower end fastening portion 13 via the lower side of the body housing 10, i.e., the lower end fastening portion 13. For example, the assembly cap 57 may have an upper end portion 57a, a body engagement portion 57b formed below the upper end portion 57a, and a housing sealing portion 57c. At this time, the upper end portion 57a supports the lower end of the orifice spring 53 and blocks the lower end of the orifice housing 51, and the main body coupling portion 57b has a thread formed around the lower end of the upper end portion 57a, And the housing closing portion 57c can seal the close contact portion with the lower portion of the main body housing 10. [ For example, the main assembly engaging portion 57b of the assembly cap 57 can be screwed with the inside of the lower end fastening portion 13 coupled to the lower end portion of the housing body 11, and the lower end fastening portion 13 The hermetically sealed housing portion 57c can be hermetically sealed with sealing means such as an O-ring or the like. The lower end of the assembly cap 57, that is, the lower end of the housing closure 57c, can be screwed into and disengaged from the lower portion of the body housing 10 of the orifice assembly 50, Lt; / RTI >

The check valve switching unit 70,

Next, the check valve switching unit 70 will be described with reference to Figs. 1A, 1B, 2A and / or 2B. The check valve switching unit 70 is installed in an annular spacing space between the periphery of the orifice assembly 50 and the inside of the main housing 10. [ The check valve switching unit 70 interrupts the flow through the annular spacing space of the fluid flowing through the first port 10a and allows flow through the annular spacing space of the fluid entering through the second port 10b Perform check valve function. At this time, the check valve function is performed when the orifice hole 51a is closed by the lifting rod 35 rising.

For example, in one example, the check valve switching unit 70 may include an annular valve seat 71, a check valve spring 73 and a hermetic seal portion 75. Further, in one example, the check valve switching unit 70 may further include an inner sealing ring 72a and an outer sealing ring 72b. Let's look at each configuration in detail.

1a, 1b, 2a, 2b and / or 3, the annular valve seat 71 is installed in an annular spaced-apart space between the first port 10a and the second port 10b. At least one check valve hole 71a is formed in the annular valve seat 71 so as to pass through the upper and lower portions along the annular shape. For example, the check valve hole 71a may be an annular arc-shaped structure formed along the annular shape, but is not limited thereto. For example, referring to FIG. 3, the check valve hole 71a may be formed in an annular arc shape along the periphery of a vertical protrusion 71e described later.

Further, in one example, the annular valve seat 71 may further include an annular inner groove 71b and / or an annular outer groove 71c. The annular inner groove 71b is formed along the inner surface facing the peripheries of the orifice assembly 50. The annular outer groove 71c is formed along the outer surface facing the inside of the main housing 10. [ At this time, the inner sealing ring 72a is inserted into the annular inner groove 71b to keep the airtightness with the orifice assembly 50, and the outer sealing ring 72b is inserted into the annular outer groove 71c, And can maintain the confidentiality.

The annular valve seat 71 interrupts the flow through the annular spacing space of the fluid flowing through the first port 10a in combination with the hermetic retaining portion 75 to be described later and prevents the flow of the fluid flowing through the second port 10b Allowing the flow through the annular spacing space of the annulus.

For example, in one example, the annular valve seat 71 may further include an assembly insertion hole 71d and a vertical protrusion 71e. The vertical protrusion 71e is vertically protruded from the upper side of the inner side to have an inner diameter larger than the inner side and connected to the outer periphery of the orifice assembly 50 along the periphery of the orifice assembly 50 Thereby forming an annular groove.

At this time, the lower end of the guide housing 36 can be inserted into the annular groove formed around the orifice assembly 50 by the vertical protrusion 71e and the outer surface of the orifice assembly 50. The guide housing 36 in which the lower end portion is inserted into the annular groove has a guide hole 36a through which the lift rod 35 penetrates at the upper end to guide the non-rotation up and down movement. At this time, when the lifting rod 35 is lowered, the head 35c protruding in the horizontal direction around the upper end of the lifting rod 35 is caught on the upper peripheral surface of the guide hole 36a and the maximum falling range may be limited .

On the other hand, the check valve spring 73 is installed around the orifice assembly 50 at the lower side of the annular valve seat 71. For example, one end of the check valve spring 73 may be provided on the lower cover portion of the body housing 10, for example, on the lower end fastening portion 13, on the assembly cap 57, or on the lower end fastening portion 13 And can be supported on the assembly cap 57.

The hermetic seal portion 75 is supported at one end by a check valve spring 73 around the orifice assembly 50. The hermetic-sealing portion 75 performs blocking and opening of the check valve hole 71a in accordance with the pressure difference between the upper portion and the lower portion with respect to the hermetic-sealing portion 75. At this time, the pressure difference between the upper and lower portions is a difference in which the pressure due to the elastic force of the check valve spring 73 applied under the airtightness maintaining portion 75 is considered together.

For example, in one example, the airtightness maintaining portion 75 includes the center hole 75a, the annular wing portion 75b, and the airtight sheet 75c. At this time, the orifice assembly 50 passes through the center hole 75a. The annular wing portion 75b protrudes outward in the horizontal direction and is supported by the other end of the check valve spring 73. The airtight sheet 75c is formed on the upper surface of the annular wing portion 75b to maintain the airtightness at the time of closing the lower portion of the check valve hole 71a.

Next, a cooling / heating system according to another embodiment of the present invention will be described in order to solve the above-mentioned problems. An air conditioning system according to one example of the present invention includes an electronic expansion valve on a piping. At this time, the electronic expansion valve may be an electronic expansion valve serving also as a check valve according to any one of the embodiments according to one aspect of the present invention described above. The detailed description of the check valve electronic expansion valve is replaced by the above description. The electronic expansion valve serving as a check valve according to the embodiments of the present invention described above can perform the check valve function as well as the main function of the electronic expansion valve according to the control. Therefore, it is possible to simplify the piping configuration in the cooling and heating system, Thereby reducing costs. Since a piping structure for causing a pipeline that performs an electronic expansion valve function and a pipeline that performs a check valve function to flow through a pipeline and that allows a fluid to flow to any one pipeline under control is well known in the art, According to the present invention, it is possible to reduce the number of the conventional parallel pipe structure to one channel and to provide the electronic expansion valve serving as a check valve according to the present invention on the pipe. Therefore, the detailed description of the piping structure capable of reducing the two pipelines to one piping so as to include the check valve electronic expansion valve according to the present invention will be omitted.

Further, in order to solve the above-mentioned problems, a heat pump system according to another aspect of the present invention will be described. A heat pump system according to one example of the present invention includes an electronic expansion valve on a piping. At this time, the electronic expansion valve may be an electronic expansion valve serving also as a check valve according to any one of the embodiments according to one aspect of the present invention described above. The detailed description of the check valve electronic expansion valve is replaced by the above description. As described above, the conventional parallel pipeline in which the piping of the electronic expansion valve and the check valve are formed in parallel in the conventional heat pump system is a well known and well-known piping structure. In the present invention, two conventional parallel pipelines are used It is possible to provide the check valve electronic expansion valve according to the present invention and perform the electronic expansion valve function and the check valve function according to the control. Therefore, the detailed description of the piping structure capable of reducing the two pipelines to one piping so as to include the check valve electronic expansion valve according to the present invention will be omitted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. At this time, various modifications may be obviously implemented according to various combinations of the above-described components by those skilled in the art. That is, various embodiments of the present invention may be embodied in various modified forms according to various combinations of the above-described elements without departing from the essential characteristics of the present invention. Accordingly, the scope of the present invention should be construed in accordance with the invention as set forth in the appended claims, along with various modifications, alternatives, and equivalents by those skilled in the art, as well as the embodiments described above.

10: main body housing 10a: first port
10b: second port 13: lower end fastening portion
15: housing cap 30: actuating rod assembly
31: motor 32: speed reducer
33: shaft rod 34: assembly housing
35: lifting rod 35a: shaft insertion groove
35b: downwardly projecting portion 35c: head portion
36: Guide housing 36a: Guide hole
36b: Euro hole 50: Orifice assembly
51: Orifice housing 51a: Orifice hole
51b: Housing through hole 53: Orifice spring
55: Orifice adjuster 55a: Upper tip portion
57: Assembly cap 70: Check valve switching unit
71: annular valve seat 71a: check valve hole
72a: inner sealing ring 72b: outer sealing ring
73: Check valve spring 75:

Claims (11)

A main body housing having a first port formed around the lower side and having a fluid inlet and outlet, and a second port formed around the upper side of the first port and through which the fluid enters and exits;
An operation rod assembly installed in an upper space in the main body housing and having a lifting rod for lifting and lowering;
And a flow path formed between the first port and the second port to open the orifice hole when the lifting rod is lowered to expand the flow path between the first port and the second port, An orifice assembly performing a function of a valve; And
An annular space defined between the periphery of the orifice assembly and the interior of the body housing for blocking flow through the annular spaced space of the fluid entering through the first port, And a check valve switching unit for allowing a flow through the annular spacing space of the check valve and performing a check valve function,
Wherein the check valve function is performed when the orifice hole is closed due to the rise of the lifting rod.
In claim 1,
The check valve switching unit comprises:
An annular valve seat provided in the annular spacing space between the first port and the second port and having at least one check valve hole penetrating upper and lower portions along an annular shape;
A check valve spring provided around the orifice assembly below the annular valve seat; And
And a hermetic retaining portion which is supported at one end by the check valve spring around the orifice assembly and performs shutoff and opening of the check valve hole in accordance with a pressure difference between the upper portion and the lower portion.
In claim 2,
Wherein the annular valve seat has an annular inner groove formed along the inner surface facing the periphery of the orifice assembly and an annular outer groove formed along the outer surface facing the inner side of the body housing,
The check valve switching unit further includes an inner sealing ring inserted in the annular inner groove to maintain a hermetic seal with the orifice assembly and an outer sealing ring inserted in the annular outer groove to maintain airtightness with the body housing. Electronic check valve and electronic expansion valve.
In claim 3,
One end of the check valve spring is supported on the lower cover part of the main housing,
The airtightness maintaining portion includes a center hole through which the orifice assembly passes, an annular wing portion protruding outward in the horizontal direction and supported by the other end of the check valve spring, and an airtight portion formed on the upper surface of the annular wing portion, And an airtight sheet for holding the airtight sheet,
The annular valve seat vertically protruding to have an assembly insert hole formed by the inner surface and an inner diameter larger than the inner surface above the inner surface and forming an annular groove around the orifice assembly with the outer surface of the orifice assembly Further comprising a vertical protrusion.
In claim 4,
Wherein the operation rod assembly further comprises a guide housing having a guide hole for guiding upward and downward movement of the lift rod through an upper end thereof and having a lower end inserted into the annular groove and at least one flow hole formed around the guide hole,
Wherein a head portion protruding in a horizontal direction around an upper end of the lifting rod when the lifting rod descends is caught on an upper peripheral surface of the guide hole and a maximum falling range is limited.
The method according to any one of claims 1 to 5,
The orifice assembly comprises:
An orifice housing having at least one housing through-hole formed at its periphery and having the orifice hole at an upper portion thereof;
An orifice spring installed in the orifice housing; And
And an orifice adjuster installed in the orifice housing and resiliently supported by the orifice spring, the orifice hole being opened and closed by a downward force of the downward movement of the lifting rod and a downward or upward movement of the orifice spring by an elastic force of the orifice spring,
Wherein the orifice assembly is interchangeably inserted into a lower space in the main housing.
In claim 6,
The orifice assembly further includes an assembly cap that supports a lower end of the orifice spring and blocks the lower end of the orifice housing,
Wherein the orifice spring has a support portion elastically supported on an upper end of the orifice spring, a tapered portion that is formed in a conical columnar shape on the upper side of the support portion and which covers a lower side of the orifice hole when lifted, and a tapered portion protruding from the upper side of the taper portion, And a high-
And an accommodating groove for receiving the tip of the lifting rod on the upper surface of the upward-pointing portion.
The method according to any one of claims 1 to 5,
The actuation rod assembly includes:
A motor for providing a lifting power of the lifting rod; And
Further comprising: a shaft rod having a male screw thread formed around the shaft and rotating with the rotation of the motor to elevate the lift rod,
Wherein the elevating rod has a non-circular structure with a horizontally sectioned surface opened to an upper side and has a female threaded shaft insertion groove, and moves up and down without rotation according to the rotation of the shaft rod inserted into the shaft insertion groove. Expansion valve.
In claim 8,
The upper portion of the lifting rod is formed to project horizontally around the upper end. The lower end of the lifting rod has a downwardly projecting downwardly protruding portion,
Wherein the operation rod assembly includes an assembly housing for housing the motor, the shaft rod, and at least the upper portion of the lift rod, and a reduction gear connected to the motor and decelerated by the rotation of the motor to transmit the reduced rotation to the shaft rod connected to the lower side Further comprising a speed reducer,
The assembly housing is formed with a step to form a shaft hole through which the shaft rod penetrates. The assembly housing houses the reducer in a space above the step, accommodates the upper portion of the lift rod in the lower space, Limited,
Wherein the downwardly projecting portion presses the upper end of the orifice hole which protrudes through the orifice hole in accordance with the descent of the lifting rod to open the orifice hole.
In an air conditioning system having an electronic expansion valve on a piping,
Wherein the electronic expansion valve is an electronic expansion valve serving also as a check valve according to any one of claims 1 to 5.
In a heat pump system having an electronic expansion valve on a piping,
Wherein the electronic expansion valve is an electronic expansion valve serving also as a check valve according to any one of claims 1 to 5.

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