KR102447040B1 - Integrated electronic valve for expansion and switching direction - Google Patents

Abstract

The present invention relates to an integrated electronic expansion and direction switching valve, and in particular, a closed state that blocks the flow of refrigerant, an expanded state that expands the refrigerant by forming an expansion gap, or a fully open state that distributes the refrigerant as it is without expanding In order to provide an expansion valve that can also be switched, the valve body 100 is formed in a block shape and the flow path 110 for communicating the input port 101 and the output port 102 is formed therein; a rotation valve 200 provided rotatably in the circumferential direction in the flow path 110 , the expansion recess 210 and the flow path hole 220 being formed therein; a valve plate 300 having a through hole 310 formed therein; It is made of an elastic airtight material and is provided rotatably integrally on at least one surface of the rotary valve 200 toward the valve plate 300 to provide airtightness between the through hole 310 of the valve plate 300 and the rotary valve 200 . and an airtight member 400 to secure; Including the driving member 500 that transmits the rotational force to the rotary valve 200, it enables precise control while simplifying the configuration of the vehicle air conditioner, and in particular, increases the airtightness of the refrigerant and the processability and productivity of the product to produce products It is aimed at lowering unit prices while maximizing market competitiveness.

Description

Integrated electronic valve for expansion and switching direction

The present invention relates to an integrated electronic expansion and direction switching valve, in particular, in a closed state that blocks the flow of refrigerant, an expanded state that expands the refrigerant by forming an expansion gap, or a fully open state that circulates the refrigerant as it is without expanding In order to provide an expansion valve that can also switch It relates to a device that can maximize the

In general, a refrigeration cycle includes a compressor, a condenser, an expansion valve, and an evaporator, and is widely used for cooling a refrigerator or an air conditioner for cooling by circulating a refrigerant.

Here, the expansion valve constituting the refrigeration cycle is a valve that reduces the high-temperature, high-pressure liquid refrigerant condensed and liquefied in the condenser to a pressure that can cause evaporation by the throttling action. plays a role in regulating the supply of

However, the conventional expansion valve has problems in that the configuration is complicated, it is difficult to control precisely, and in particular, workability and productivity are deteriorated, and airtightness to the refrigerant is also low.

Recently, by improving the refrigeration cycle and constructing a heat pump that circulates the refrigerant in the reverse direction, it is also used as a heat source for a heater or an air conditioner for heating.

According to the configuration of the heat pump, conventionally, an expansion valve for cooling and an expansion valve for heating were respectively configured. .

Accordingly, a three-way expansion valve that expands while passing the refrigerant from one input port to one of the two output ports along with a two-way expansion valve that expands while passing the refrigerant in both the forward and reverse directions has been developed.

Patent Literature 1, Korean Patent Publication No. 2011-0043208, Patent Literature 2, Korean Patent Registration No. 10-0835259, and Patent Literature 3, Korean Patent Publication No. 10-0441058, have two A technique of expanding the refrigerant while switching the refrigerant to any one of the above output ports is disclosed.

However, the conventional expansion valve disclosed in Patent Documents 1 to 3 simply focuses on communicating any one of two or more output ports from one input port, and forms an expansion gap of an appropriate size to expand the refrigerant. There was a problem in the prior art that it was impossible to adjust the expansion state to expand and the fully open state to allow the refrigerant to pass through without expansion.

Domestic Patent Publication No. 2011-0043208 Domestic Registered Patent Publication No. 10-0835259 Domestic Registered Patent Publication No. 10-0441058

The present invention is to solve the above problems, and enables precise control while simplifying the configuration of an air conditioner for a vehicle. It is intended to provide an integrated electronic expansion and direction switching valve that can maximize it.

The electronic expansion and direction switching integrated valve according to the present invention has a block shape, an input port to which refrigerant is supplied to one side, an output port to which refrigerant is discharged to the other side, and a flow path for communicating the input port and the output port a valve body formed therein; an expansion recess formed in a plate shape and rotatably provided in the circumferential direction within the flow path between the input port and the output port, the expansion recess extending in the circumferential direction with a predetermined radial width; a rotary valve in communication but having a passage hole having a radial width wider than a radial width of the expansion recess; a valve plate formed in a plate shape, stacked in contact with the rotary valve, fixed non-rotatably in the flow path of the valve body, and having a through hole formed along the circumferential direction; an airtight member made of synthetic resin or an elastic airtight material and provided rotatably integrally on at least one surface of the rotary valve toward the valve plate to secure airtightness between the through hole of the valve plate and the rotary valve; It is achieved by including a driving member for transmitting a rotational force to the rotary valve.

In this case, it is preferable that the expansion recesses overlap in the circumferential direction outside the radial direction of the through hole to form an expansion gap.

In addition, the output port of the valve body includes a first output port and a second output port formed independently of each other; The through-holes of the valve plate include first and second through-holes spaced apart from each other in a circumferential direction to correspond to the first output port and the second output port, respectively; It is preferable that the refrigerant can be supplied by switching from one input port to any one of the two output ports.

In addition, it is preferable that the sealing member and the rotary valve are formed in a polygonal or arc shape coupled to each other in contact with each other, so that the hermetic member rotates integrally when the rotary valve is rotated.

In particular, the driving member includes a shaft connected to the rotation center of the rotary valve to rotate integrally, and a step motor capable of controlling a rotation angle according to power control and transmitting rotational force to the shaft; The valve plate may preferably have a support groove formed in the center to rotatably support the lower end of the shaft.

The present invention as described above enables precise control while simplifying the configuration of the vehicle air conditioner, and in particular, increases the airtightness of the refrigerant and the processability and productivity of the product, thereby lowering the production cost of the product and maximizing the market competitiveness It is an invention that can maximize market competitiveness. .

1 is a front sectional view showing an example of an integrated electronic expansion and direction switching valve according to the present invention;
2 is a plan view showing a rotary valve, an airtight member, and a valve plate in an example of the integrated electronic expansion and direction switching valve according to the present invention;
3 is a view showing a state in which the rotary valve and the airtight member are integrated with each other in an example of the integrated electronic expansion and direction switching valve according to the present invention;
4 is a plan view showing a state in which a rotary valve, an airtight member, and a valve plate are stacked in an example of the integrated electronic expansion and direction switching valve according to the present invention;
5 is an exploded perspective view of a rotary valve, an airtight member, and a valve plate in an example of the integrated electronic expansion and direction switching valve according to the present invention;
6 is an exploded perspective view of the bottom surface of the rotary valve, the airtight member, and the valve plate in an example of the integrated electronic expansion and direction switching valve according to the present invention;
7 is a diagram illustrating an expansion gap formed according to a radial position of an expansion recess in an example of the integrated electronic expansion and diversion valve according to the present invention;
8 is a view showing a closed state of the output port in an example of the integrated electronic expansion and direction switching valve according to the present invention;
9 is a view showing the expansion state of the refrigerant to the output port in an example of the integrated electronic expansion and direction switching valve according to the present invention;
10 is a view showing a fully open state of the refrigerant to the output port in an example of the integrated electronic expansion and direction switching valve according to the present invention;
11 is a front sectional view showing another example of the integrated electronic expansion and direction switching valve according to the present invention;
12 is a view showing the lower body of the valve body in another example of the integrated electronic expansion and direction switching valve according to the present invention;
13 is a plan view showing a valve plate in another example of an integrated electronic expansion and diversion valve according to the present invention;
14 is a plan view showing a state in which a rotary valve, an airtight member, and a valve plate are stacked in another example of the integrated electronic expansion and direction switching valve according to the present invention;
15 is an exploded perspective view of a rotary valve, an airtight member, and a valve plate in another example of the integrated electronic expansion and direction switching valve according to the present invention;
16 is a bottom exploded perspective view of the rotary valve, the airtight member, and the valve plate in another example of the integrated electronic expansion and direction switching valve according to the present invention;
17 is a perspective view showing a bush in another example of the integrated electronic expansion and direction switching valve according to the present invention;
18 is a view showing the closed state of both the first output port and the second output port in another example of the integrated electronic expansion and diversion valve according to the present invention;
19 is a view showing the expansion state of the refrigerant to the first output port and the closed state of the second output port in another example of the integrated electronic expansion and direction switching valve according to the present invention;
20 is a view showing a fully open state of the refrigerant to the first output port and a closed state of the second output port in another example of the integrated electronic expansion and direction switching valve according to the present invention;
21 is a view showing the closed state of both the first output port and the second output port in another example of the integrated electronic expansion and diversion valve according to the present invention;
22 is a view showing a closed state of a first output port and an expansion state of a refrigerant to a second output port in another example of the integrated electronic expansion and direction switching valve according to the present invention;
23 is a view showing a closed state of the first output port and a fully open state of the refrigerant to the second output port in another example of the integrated electronic expansion and direction switching valve according to the present invention.

1 is a front sectional view showing an example of an integrated electronic expansion and direction switching valve according to the present invention, and FIG. 2 is a rotary valve, an airtight member, and a valve plate in an example of the integrated electronic expansion and direction switching valve according to the present invention. As a plan view showing, Fig. 2 (a) shows a rotary valve, Fig. 2 (b) shows an airtight member, and Fig. 2 (c) shows a valve plate, respectively.

And, Figure 3 is a road showing a state in which the rotary valve and the airtight member are integrated with each other in an example of the integrated electronic expansion and direction switching valve according to the present invention, Figure 3 (a) is a perspective view, Figure 3 ( b) is a bottom perspective view, and FIG. 4 is a plan view showing a state in which the rotary valve, the airtight member, and the valve plate are stacked in an example of the integrated electronic expansion and direction switching valve according to the present invention.

5 is an exploded perspective view of the rotary valve, the airtight member, and the valve plate in an example of the integrated electronic expansion and direction switching valve according to the present invention, and FIG. 6 is an electronic expansion and direction switching integrated valve according to the present invention. A bottom exploded perspective view of the rotary valve, the airtight member, and the valve plate in an example, FIG. 7 is an expansion gap formed according to the radial position of the expansion recess in an example of the integrated electronic expansion and switching valve according to the present invention is a diagram to explain

In addition, Fig. 8 is a view showing the closed state of the output port in an example of the integrated electronic expansion and diversion valve according to the present invention, and Fig. 9 is an output port in an example of the integrated electronic expansion and diversion valve according to the present invention. It is a diagram showing the expansion state of the refrigerant, and Figure 10 is a diagram showing the fully open state of the refrigerant to the output port in an example of the integrated electronic expansion and direction switching valve according to the present invention.

At this time, in FIGS. 8 to 10 , (a) of each figure is a plan view, and (b) of each figure is a cross-sectional view of each of the lines B-B to D-D shown in (a) of each figure.

Next, FIG. 11 is a front sectional view showing another example of the integrated electronic expansion and direction switching valve according to the present invention, and FIG. 12 is the lower part of the valve body in another example of the integrated electronic expansion and direction switching valve according to the present invention. As a road showing the body, Fig. 12 (a) is a plan view, Fig. 12 (b) is a cross-sectional view taken along line A-A of Fig. 12 (a), and Fig. 13 is electronic expansion and direction change integration according to the present invention It is a plan view showing a valve plate in another example of a valve.

And, Figure 14 is a plan view showing a state in which the rotary valve, the airtight member, and the valve plate are stacked in another example of the integrated electronic expansion and direction switching valve according to the present invention, Figure 15 is the electronic expansion and An exploded perspective view of a rotary valve, an airtight member, and a valve plate in another example of the integrated directional valve, FIG. 16 is a rotary valve, airtight member, and It is a bottom exploded perspective view of the valve plate.

In addition, Fig. 17 is a perspective view showing a bush in another example of the integrated electromagnetic expansion and diversion valve according to the present invention.

18 is a view showing a closed state of both the first output port and the second output port in another example of the integrated electronic expansion and direction switching valve according to the present invention, and FIG. 19 is an electronic expansion and direction according to the present invention. In another example of the integrated switching valve, it is a view showing the expansion state of the refrigerant to the first output port and the closed state of the second output port, and FIG. 20 is another example of the integrated electronic expansion and direction switching valve according to the present invention. It is a diagram showing the fully open state of the refrigerant to the first output port and the closed state of the second output port.

And, Figure 21 is a view showing the closed state of both the first output port and the second output port in another example of the integrated electronic expansion and direction switching valve according to the present invention, Figure 22 is the electronic expansion and direction according to the present invention In another example of the integrated switching valve, it is a diagram showing the closed state of the first output port and the expansion state of the refrigerant to the second output port, and FIG. 23 is another example of the integrated electronic expansion and direction switching valve according to the present invention. It is a diagram showing the closed state of the first output port and the completely open state of the refrigerant to the second output port.

At this time, in FIGS. 18 to 23, (a) of each figure is a plan view, and (b) of each figure is each sectional drawing along E-E line - J-J line shown in each figure (a).

The specific structural or functional descriptions presented in the embodiments of the present invention are merely exemplified for the purpose of describing the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described herein, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Meanwhile, in the present invention, terms such as first and/or second may be used to describe various components, but the components are not limited to the above terms. The above terms are used only for the purpose of distinguishing one component from other components, for example, within the scope not departing from the scope of the rights according to the concept of the present invention, the first component may be named as the second component, Similarly, the second component may also be referred to as the first component.

When a component is referred to as being “connected” or “connected” to another component, it should be understood that it may be directly connected or connected to the other component, but other components may exist in between. something to do. On the other hand, when an element is referred to as being “directly connected” or “in direct contact with” another element, it should be understood that no other element is present in the middle. Other expressions for describing the relationship between elements, that is, expressions such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. As used herein, terms such as “comprises” or “have” are intended to designate the presence of an embodied feature, number, step, action, component, part, or combination thereof, one or more other features or numbers, It should be understood that the possibility of the presence or addition of steps, operations, components, parts or combinations thereof is not precluded in advance.

The electronic expansion and direction switching integrated valve according to the present invention enables precise control while simplifying the configuration of the vehicle air conditioner, and, in particular, increases the airtightness of the refrigerant and the processability and productivity of the product, thereby lowering the production cost of the product and improving market competitiveness. What can be maximized is the basic characteristic of the technology.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings as follows.

The present invention is an electronic expansion and direction switching integrated valve through which a refrigerant passes when circulating a refrigerant for cooling in a vehicle air conditioner, and may be provided between a condenser and an evaporator.

First, an example of the integrated electronic expansion and direction switching valve according to the present invention is made of a block shape, as shown in FIGS. a valve body 100 having an output port 102 to be discharged, and a flow path 110 for communicating the input port 101 and the output port 102 therein; It is formed in a plate shape and is provided rotatably in the circumferential direction in the flow path 110 between the input port 101 and the output port 102, and extends along the circumferential direction with a predetermined radial width w. and an expansion recess 210 to be formed, and a channel hole 220 communicating with the distal end of the expansion recess 210 and having a radial width W wider than the radial width w of the expansion recess 210 . And the rotary valve 200 is formed; Valve plate ( 300) and; It is made of synthetic resin or an elastic airtight material and is provided rotatably integrally on at least one surface of the rotary valve 200 toward the valve plate 300 , the through hole 310 of the valve plate 300 and the rotary valve 200 ) and the airtight member 400 to ensure mutual airtightness; It is preferable to include a driving member 500 for transmitting a rotational force to the rotary valve 200 .

That is, an example of the integrated electronic expansion and direction switching valve of the present invention basically includes a valve body 100 , a rotary valve 200 , a valve plate 300 , an airtight member 400 , and a driving member 500 . are doing

First, the valve body 100 is a configuration constituting a basic skeleton in the integrated electronic expansion and direction switching valve of the present invention, and is composed of a block shape, preferably a substantially hexahedral block shape.

At this time, there will be no limitation on the external shape of the valve body 100, and may have a polygonal prism or a cylindrical shape, including a hexahedral quadrangular prism.

In such a valve body 100, an input port 101 to which a refrigerant is supplied may be formed on one side as shown in FIG. An output port 102 through which the refrigerant is discharged may be formed.

At the same time, a flow path 110 for communicating the input port 101 and the output port 102 as one is formed inside the valve body 100 , and the refrigerant flows through the flow path 110 into the input port. from 101 to the output port 102 .

Accordingly, for example, the refrigerant entering the input port 101 may be discharged to the output port 102 during cooling operation.

For convenience of explanation, the input port 101 is formed on the upper side of the valve body 100 and the output port 102 is formed on the lower side and will be described below, but each port according to the arrangement direction of the valve body 100 It will be apparent that the location of the may be changed, but not limited thereto.

In the middle of the flow path 110 of the valve body 100 as described above, a rotation valve 200 and a valve plate 300 for controlling the passage and expansion of the refrigerant will be provided.

Here, when the above-described valve body 100 is described in more detail, the valve body 100 may be formed of a single body, but is divided into a plurality of bodies as shown in FIG. 1 in consideration of formability and assemblyability. will be able to be produced.

For example, the valve body 100 may be manufactured by dividing it into a main body 120 , a lower body 130 , and a fixed body 140 , and then assembled into one.

First, the main body 120 is located at the center of the valve body 100 and has a flow path 110 penetrating it up and down. 300 may be provided on the inner circumferential surface of the main body 120 .

At this time, the inner peripheral surface of the main body 120 is processed to have a uniform inner diameter without a step, it becomes possible to increase the workability.

In addition, the above-described input port 101 and output port 102 are formed in the lower body 130 , and the above-described main body 120 is disposed in the inner center of the lower body 130 as shown in FIG. 1 . it can be

In addition, as shown in FIG. 1 , the fixed body 140 may be assembled by maintaining airtightness in the upper opening of the lower body 130 .

According to this configuration, the flow path 110 from the input port 101 to the output port 102 by the main body 120 , the lower body 130 , and the fixed body 140 in the valve body 100 . ) can be formed.

In FIG. 1 , reference numeral 104 denotes a sealing, which is located between the main body 120 and the lower body 130 to prevent leakage of the refrigerant, and is located between the fixed body 140 and the lower body 130 to provide a refrigerant leakage can be prevented.

In this case, the driving member 500 to be described later may be provided through the fixed body 140 .

Next, as shown in FIGS. 2 to 6 , the rotary valve 200 is made by processing a disk made of a plate material having an approximately predetermined thickness, and is formed between the input port 101 and the output port 102 . It is disposed in the flow path 110 so as to cross the flow path 110 and is rotatably provided in the circumferential direction.

As described above, the rotary valve 200 may be provided on the inner circumferential surface of the main body 120 in the valve body 100 .

At this time, the rotation valve 200 is rotated to have an outer diameter slightly smaller than the inner diameter of the main body 120 so as to smoothly rotate within the inner circumferential surface of the main body 120 in the valve body 100 . A valve 200 is formed.

As shown in FIG. 2 , in the rotary valve 200 , an expansion recess 210 and a flow hole 220 are formed along the circumferential direction.

First, the expansion recess 210 is formed in a shape extending in the circumferential direction with a predetermined radial width w, and the flow path hole 220 is communicated with the distal end of the expansion recess 210 and the It has a radial width (W) wider than the radial width (w) of the expansion recess 210 is formed in a shape extending in the circumferential direction.

At this time, the molding position of the expansion recess 210 may be located within the radial width W of the flow hole 220 so that the expansion recess 210 and the flow hole 220 communicate, It may be located outside the radial width W of the flow path hole 220 at the center or outside.

However, a preferred position of the expansion recess 210 for effectively performing the expansion of the refrigerant will be described later, and first, the expansion recess 210 is positioned radially outside the rotation valve 200 to form the expansion recess. An example in which the 210 and the flow hole 220 are formed in communication will be described below.

In addition, in the rotary valve 200 , the expansion recess 210 overlaps the through hole 310 of the valve plate 300 to be described later to form an expansion gap to expand the refrigerant.

In addition, in the rotary valve 200 , the flow path hole 220 overlaps the through hole 310 to allow the refrigerant to pass through without expansion of the refrigerant.

Here, the rotation direction of the rotary valve 200 may be controlled in both clockwise and counterclockwise directions in FIG. For example, it would be desirable to control to rotate only counterclockwise.

If the rotation valve 200 is controlled to rotate only in the counterclockwise direction, as illustrated in FIG. It is preferable to position the flow path hole 220 on the clockwise side with respect to the recess 210 .

That is, when the rotation valve 200 is rotated counterclockwise, the expansion recess 210 overlaps the through hole 310 before the flow hole 220, so that the expansion of the refrigerant precedes the rotation valve ( When the 200 is further rotated, it would be good to make the flow hole 220 overlap the through hole 310 so that the refrigerant can be completely opened.

And, as shown in FIG. 1 , the valve plate 300 is stacked so that the valve plate 300 comes into contact with the rotary valve 200 , and in particular, the valve plate 300 is stacked so that the valve plate 300 comes into contact with the lower side of the rotary valve 200 . will be.

At this time, as described above, the rotary valve 200 is provided rotatably in the circumferential direction in the valve body 100 , while the valve plate 300 is fixedly installed in the valve body 100 to be non-rotatable.

As such, the valve plate 300 is made of a plate material, and in order to prevent rotation in the valve body 100, the outer periphery shape may be manufactured in a polygonal shape or the like.

However, rather than this, in consideration of formability and assemblyability, the valve plate 300 is manufactured in the form of a disk, and then a cut-out part (not shown) in which a part is cut off is formed on the outer periphery, and with this, the valve body 100 It will be preferable to form a protrusion (not shown) corresponding to this cut-out, so that the valve plate 300 is non-rotatably assembled in the valve body 100 .

Accordingly, rotation of the valve plate 300 in the circumferential direction is limited in the state assembled to the valve body 100 , and between the outer circumferential surface of the valve plate 300 and the inner circumferential surface of the main body 120 , the refrigerant Confidentiality should be maintained to prevent leakage of

At this time, the valve plate 300 has a predetermined radial width and extends in the circumferential direction as shown in FIG. .

In particular, the shape of the through hole 310 may be manufactured to have substantially the same shape as the flow hole 220 of the rotary valve 200 described above, but the cross-sectional area of the through hole 310 is the same as that of the flow hole 220 . A similar or slightly wider would be nice.

At this time, when it is desired to form the cross-sectional area of the through hole 310 slightly wider than that of the passage hole 220 , the radial width is maintained similarly, while the circumferential width is larger than that of the passage hole 220 . 310) is preferably formed rather wide.

In the rotary valve 200 described above, the radial position at which the expansion recess 210 is formed and the circumferential width of the through hole 310 affect the control precision of the integrated electronic expansion and direction switching valve according to the present invention. This effect will be described later.

According to this configuration, the rotary valve 200 can control the expansion of the refrigerant as well as the opening/closing control of the expansion valve according to the present invention by a relative rotation movement with the valve plate 300 fixed in the valve body 100. there will be

For example, when the expansion recess 210 of the above-described rotary valve 200 overlaps the through hole 310 of the valve plate 300 as shown in FIG. 9 , an expansion gap is formed to expand the refrigerant. will be

In addition, when the rotary valve 200 is further rotated counterclockwise so that the flow path hole 220 overlaps the through hole 310 of the valve plate 300 as shown in FIG. 10 , the refrigerant flow path is secured widely It will be in a completely open state without expansion of the refrigerant.

In addition, as shown in FIG. 8 , when neither the expansion recess 210 nor the flow hole 220 of the rotary valve 200 overlaps the through hole 310 of the valve plate 300, the expansion valve is in a closed state. This will block the flow of refrigerant.

In particular, in the present invention, an airtight member 400 is additionally provided on at least one surface of the rotary valve 200 in order to more reliably prevent leakage of the refrigerant in such a closed state.

The airtight member 400 is made of an elastic airtight material such as synthetic resin, Teflon, rubber, or silicone, and is rotatably provided to the rotary valve 200 toward the valve plate 300 .

At this time, the airtight member 400 may be manufactured separately from the rotary valve 200 and then integrated through bonding, or the airtight member 400 and the rotary valve 200 are integrated through insert injection or the like. It may also be molded into

In particular, since the airtight member 400 functions only when the rotary valve 200 completely closes the through hole 310 of the valve plate 300 , the The airtight member 400 will not need to be provided.

That is, in the rotary valve 200 , the valve body 230 is located inside the expansion recess 210 in which the refrigerant is expanded by forming a fine gap with the through hole 310 of the valve plate 300 . There will be no need to provide the airtight member 400 .

However, in order to completely close the through hole 310 of the valve plate 300, the airtight member 400 may be formed in all parts of the rotary valve 200 except for the valve body 230, The airtight member 400 closes the through hole 310 of the valve plate 300 to maintain high airtightness.

To this end, as illustrated in FIGS. 3 to 6 , the airtight member 400 may be provided on the lower side of the rotary valve 200 in contact with the valve plate 300 , and the refrigerant expands. The airtight member 400 is provided in a portion other than the valve body 230 .

There will be no limit to the thickness of the airtight member 400 , the figure illustrates the airtight member 400 corresponding to a half thickness of the rotary valve 200 .

Accordingly, in the case of bonding the airtight member 400 to the rotary valve 200 without insert injection, as illustrated in FIG. 6 , the rotary valve 200 is in advance in the shape of the air tight member 400 . Correspondingly, it will need to be engraved.

According to this configuration, when the rotary valve 200 closes the through-hole 310 of the valve plate 300 , the airtight member 400 is positioned at a portion corresponding to the through-hole 310 , so that the refrigerant leakage can be effectively prevented.

Finally, the driving member 500 may include a motor as a driving source for transmitting the rotational force to the above-described rotary valve 200 .

First, as shown in FIG. 1 , the driving member 500 is connected to the rotation center of the rotation valve 200 and integrally rotates with the shaft 510 and the rotation angle can be controlled according to the power control. It may include a step motor 520 that transmits a rotational force to the shaft 510 .

In addition, the rotational force output to the output shaft of the step motor 520 is transmitted to the shaft 510 directly as shown in FIG. 1 or indirectly as shown in FIG. 11 as described in another example below to rotate the shaft 510 . it could be

Here, when the rotational force of the step motor 520 is directly transmitted to the shaft 510 , the output shaft of the step motor 520 may be integrally formed with the shaft 510 as shown in FIG. 1 .

In this case, the rotation speed of the output shaft with respect to the step motor 520 will be directly transmitted to the shaft 510 without a separate deceleration.

In addition, the shaft 510 is disposed so that a part thereof passes through the flow path 110 of the valve body 100 described above, and the lower portion of the shaft 510 includes the valve plate 300 and the airtight member 400 from below. , and the rotary valve 200 will be sequentially stacked.

In addition, the valve plate 300 is not affected by the rotation of the shaft 510 , and only the center of rotation is supported by the shaft 510 , and the shaft 510 is positioned with respect to the valve plate 300 . placed as children.

However, the rotary valve 200 has a protrusion portion as shown in FIGS. 2 to 6 in the coupling hole 201 formed in the center of the rotary valve 200 so as to rotate integrally with the shaft 510 as described above. It is formed to protrude, and a cut-out portion (not shown) is formed in the shaft 510 to correspond to the protrusion of the coupling hole 201 described above. are interlocked

Accordingly, since the shaft 510 and the rotation valve 200 can rotate integrally, it is possible to transmit the rotational force of the shaft 510 to the rotation valve 200 .

So far, the structure in which the rotary valve 200 is stacked on the valve plate 300 has been described, but although not shown, a structure in which the valve plate 300 is stacked on the rotary valve 200 may be used as needed, and two valves A structure in which the rotary valve 200 is positioned between the plates 300 may be preferred.

In this case, the airtight member 400 may be provided on the upper side or both sides of the upper and lower sides of the rotary valve 200 , and in the case of a structure in which the rotary valve 200 is positioned between the two valve plates 300 , leakage of refrigerant would be most effective in preventing

Additionally, as shown in FIG. 1 , it may be desirable to add a ring-shaped main sealing 160 along the periphery of the opening communicating with the output port 102 in the lower body 130 .

This main sealing 160 is made of an airtight material with elasticity, and is provided between the valve plate 300 and the lower body 130, so that the input port 101 and the output port 102 are distinguished from each other with high airtightness. do.

As a result, when the refrigerant from the input port 101 to the output port 102 in the valve body 100 is blocked by the control of the above-described rotary valve 200, it is possible to effectively block the refrigerant from leaking.

Until now, the operation of simply forming the expansion recess 210 and the flow path hole 220 to pass the coolant without the expansion of the coolant or the expansion of the coolant has been described, but in the present invention, the expansion recess 210 is It is possible to increase the expansion efficiency of the refrigerant by appropriately defining the position.

Here, expansion efficiency means the degree of throttling, and throttling means that when a valve, cock, or a plate with a thin hole is attached to a part of the fluid passage to narrow the cross-sectional area of the flow, the flow rate is reduced by the pressure difference that already exists. This phenomenon is called a forced increase, which causes the intermolecular distance to increase and the pressure to drop.

That is, it can be said that the higher the degree of throttling by forming an expansion gap of an appropriate size, the better the expansion efficiency.

For example, as shown in (a) of FIG. 7 , the expansion recess 210 may be formed in the radial middle of the rotation valve 200 to communicate with the flow path hole 220 , or FIG. As shown in (b), the expansion recess 210 may be formed on the radially central side of the rotary valve 200 to communicate with the flow path hole 220, or as shown in FIG. 7(c), the expansion recess 210 The set 210 may be formed on the radially outer side of the rotation valve 200 to communicate with the flow path hole 220 .

First, as shown in (a) of FIG. 7 , when the expansion recess 210 is formed in the radial middle of the rotary valve 200 to communicate with the flow path hole 220 , the expansion recess Regardless of the circumferential width of 210 , the cross-sectional area connected to the through hole 310 formed in the valve plate 300 is determined according to the size of the radial width w of the expansion recess 210 , and this cross-sectional area will affect the expansion efficiency of the refrigerant.

In order to properly maintain this cross-sectional area to increase the expansion efficiency, the end of the expansion recess 210 needs to be maintained in a state in which the end of the expansion recess 210 is minutely overlapped with the through hole 310 to form an expansion gap, so that the rotary valve 200 . A more precise control is inevitably required to control the rotation angle of

In addition, as shown in (b) of FIG. 7 , when the expansion recess 210 is formed on the radially central side of the rotary valve 200 to communicate with the flow path hole 220 , the rotary valve It is not necessary to precisely control the rotation angle of (200).

However, since the circumferential width in which the expansion recess 210 of the rotary valve 200 and the through hole 310 of the valve plate 300 overlap is remarkably small, there is no limitation in forming a long expansion gap for the refrigerant. there will be

On the other hand, as shown in (c) of FIG. 7 , when the expansion recess 210 is formed on the radially outer peripheral side of the rotary valve 200 to communicate with the flow path hole 220 , As such, there is no need to precisely control the rotation angle of the rotation valve 200 , and the circumferential width where the expansion recess 210 of the rotation valve 200 and the through hole 310 of the valve plate 300 overlap By being able to ensure relatively long, it also becomes possible to form an expansion|swelling gap long as a result.

As a result, in the present invention, it is most preferable that the expansion recess 210 overlaps in the circumferential direction from the radially outer side of the through hole 310 to form an expansion gap.

Next, it will be described for improving the coupling properties of the above-described rotary valve 200 and the airtight member 400 .

That is, in the present invention, the airtight member 400 and the rotary valve 200 have a polygonal or arc shape that engages and engages with each other at a mutual contact portion, and the airtight member 400 and the rotary valve 200 rotate when the rotary valve 200 rotates. It would be desirable to allow the member 400 to rotate integrally.

For example, as shown in FIGS. 5 and 6 , a convex convex portion is formed in a substantially square columnar shape near the center of the rotary valve 200 , and a square columnar convex portion is formed near the center of the airtight member 400 . It is possible to form a concave recess to correspond to the convex part, so that the recess and the convex part are engaged with each other.

In addition, in the vicinity of the center of the airtight member 400, a convex convex portion is formed in a substantially hook-shaped arc shape, and a concave concave portion is formed to correspond to the convex portion in the vicinity of the center of the rotary valve 200. It is also possible to make the iron parts mesh with each other.

As a result, it becomes possible to increase the bonding force between the rotary valve 200 and the airtight member 400, and the airtight member 400 molded by adhesion or insert injection when the rotary valve 200 rotates is separated. can be effectively prevented.

In addition, in the present invention, the driving member 500 is connected to the rotation center of the rotation valve 200 as described above and rotates integrally with the shaft 510 and the rotation angle control according to the power control. It is possible and includes a step motor 520 that transmits a rotational force to the shaft 510; In particular, it is preferable that the support groove 301 for rotatably supporting the lower end of the shaft 510 is formed in the center of the valve plate 300 .

That is, the support groove 301 is formed in the center of the valve plate 300 as shown in FIG. 5 , and the support groove 301 of the valve plate 300 is rotated at the lower end of the shaft 510 as shown in FIG. 1 . By supporting it, it is possible to reliably prevent eccentricity with respect to the shaft 510 .

In addition to this, the lower end of the shaft 510 pushes the valve plate 300 downward, and the lower surface of the valve plate 300 presses the main sealing 160 located at the lower side thereof, so that the valve plate 300 and the main It becomes possible to ensure a higher airtightness between the sealings 160 .

Next, another example of the integrated electronic expansion and direction switching valve according to the present invention will be described with reference to FIGS. 11 to 20 .

Another example of the integrated electronic expansion and switching valve of the present invention, the output port 102 of the valve body 100 includes a first output port (102a) and a second output port (102b) formed independently of each other, ; The through-hole 310 of the valve plate 300 corresponds to the first output port 102a) and the second output port 102b, respectively, and a first through-hole 311 and a second through-hole 311 formed to be spaced apart along the circumferential direction, respectively. 2 including through-holes 312; It is characterized in that the refrigerant can be supplied by switching from one input port 101 to any one of the two output ports 102a and 102b.

That is, in another example of the integrated electronic expansion and direction switching valve of the present invention, two output ports 102a and 102b are formed in the valve body 100 to circulate the refrigerant through different paths during cooling and heating. and two through-holes 311 and 312 are formed in the valve plate 300 .

Accordingly, another example of the integrated electronic expansion and direction switching valve of the present invention is to be applied to a heat pump of an air conditioner for a vehicle, particularly an electric vehicle, and both the forward circulation of the refrigerant for cooling and the reverse circulation of the refrigerant for heating As one electromagnetic valve through which the refrigerant passes, it may be provided between the condenser and the evaporator.

The description of the same configuration and operation as the one example of the integrated electronic expansion and direction switching valve according to the present invention described above will be omitted.

First, as shown in FIGS. 11 and 12 , a first output port 102a ) and a second output port 102b through which refrigerant is discharged are formed on the lower side of the valve body 100 to face each other.

At the same time, the input port 101, the first output port (102a)), and the flow path 110 for communicating the second output port (102b) into one is formed in the valve body 100, , the refrigerant may pass from the input port 101 to the first output port 102a) or the second output port 102b through this flow path 110 .

Accordingly, for example, when cooling, the refrigerant entering the input port 101 will be discharged to the first output port 102a), and during heating, the refrigerant entering the input port 101 will be discharged to the second output port 102b. ) may be emitted.

For convenience of description, the input port 101 is formed on the upper side of the valve body 100, and the first output port (102a)) and the second output port (102b) are formed on the lower side. The position of each port may be changed according to the arrangement direction of the body 100 , and it will be apparent that the present invention is not limited thereto.

In addition, as shown in FIG. 12 , the lower body 130 is provided with the above-described input port 101 and the first output port 102a) and the second output port 102b, and the lower body 130 ) in the inner center of the main body 120 as described above as shown in FIG. 11 may be disposed.

At this time, as shown in FIG. 12 , the first output port 102a) and the second output port 102b are disposed to face each other on the left and right in the drawing at an almost equal height, and the input port 101 is The first output port (102a)) and the second output port (102b) and the doedoe forming a right angle may be formed with a height difference.

However, for convenience of explanation, in FIG. 11 , the input port 101 is exemplified in the same direction (left in the drawing) as the second output port 102b with a height difference, but in reality, as shown in FIG. 12 , the input port 101 It is preferable that 101 is formed in a direction forming a right angle with respect to both the first output port 102a and the second output port 102b, respectively, which is wrong when connecting the refrigerant pipe to the expansion valve according to the present invention. It will prevent assembly and play a role in increasing the design freedom for the heat pump.

Next, the rotary valve 200 is disposed in the flow path 110 to cross the flow path 110 between the input port 101 and the first output port 102a and the second output port 102b. arranged to be rotatable in the circumferential direction.

At this time, in the rotary valve 200, the expansion recess 210 overlaps the first through hole 311 or the second through hole 312 of the valve plate 300 to form an expansion gap to expand the refrigerant. , the flow hole 220 overlaps the first through hole 311 or the second through hole 312 to allow the refrigerant to pass through without expansion of the refrigerant.

Further, as shown in FIG. 13 , a first through hole 311 and a second through hole 312 are formed in the valve plate 300 to be spaced apart along the circumferential direction, and preferably a phase angle difference of about 180 degrees. The first through hole 311 and the second through hole 312 are formed so as to be symmetrical with each other.

Here, the first through hole 311 corresponds to the first output port 102a formed in the lower body 130 of the valve body 100 as shown in FIG. 11 , and the second through hole 312 . is to correspond to the second output port (102b) formed in the lower body (130) of the valve body (100).

In addition, the first through hole 311 and the second through hole 312 are preferably formed to have the same shape and cross-sectional area as shown in FIGS. 13 to 16 .

According to this configuration, the rotary valve 200 controls the opening and closing of the expansion valve according to the present invention by a relative rotation motion with the valve plate 300 fixed in the valve body 100 to control whether the refrigerant is expanded or not. The flow path switching of the refrigerant can also be controlled.

In addition, in another example of the integrated electronic expansion and direction switching valve of the present invention, as shown in FIG. 11 , a cover 150 is additionally provided on the upper side of the valve body 100 .

The cover 150 surrounds the upper portion of the lower body 130 in the above-described valve body 100 and is assembled on the upper side, and in particular, the driving member 500 may be provided on the cover 150 .

The cover 150 may be assembled to surround the upper end of the lower body 130 by a plurality of fastening means 151 .

In another example of the integrated electronic expansion and direction switching valve according to the present invention, the rotational force of the step motor 520 is indirectly transmitted to the shaft 510, and as shown in FIG. 11 , the output shaft of the step motor 520 and the shaft Between the 510 , for example, a reduction gear 530 may be additionally disposed.

When the reduction gear 530 is applied as described above, as shown in FIG. 11 , the reduction gear 530 is a second gear having a separate rotation shaft and formed with a large-diameter portion having a large outer diameter and a small-diameter portion having a small outer diameter.

The rotation shaft rotatably supporting the reduction gear 530 may be provided in a peripheral configuration such as the cover 150 or the fixed body 140 , and in FIG. 11 , the rotation shaft of the reduction gear 530 is the cover 150 . An example supported by is shown.

At this time, in the reduction gear 530 , the large diameter portion meshes with the output shaft gear 521 fixed to the output shaft of the step motor 520 , and the small diameter portion of the reduction gear 530 is fixed to the shaft 510 . It meshes with the shaft gear 511 .

Accordingly, after the rotational force of the step motor 520 is decelerated by the reduction gear 530 , it can be transmitted to the shaft 510 , and it is possible to exert a high torque.

In addition, it is preferable that a bush 600 for increasing adhesion between the rotary valve 200 and the valve plate 300 is provided in the middle of the shaft 510 as shown in FIG. 11 .

The bush 600 may be provided in the middle of the shaft 510 so that the above-described rotary valve 200 applies a downward force toward the valve plate 300 .

To this end, the bush 600 may be positionally fixed to the shaft 510 by a separate fastening means.

However, the bush 600 is made of a boss 610 through which the shaft 510 penetrates in the center, as shown in FIG. 17 , and a plurality of fan-shaped blades 620 radially extending from the boss 610 . , and the valve body 100 is divided into a plurality of bodies, and it is most preferable that any one of the divided bodies downwardly support the rim of the wing 620 of the bush 600 .

That is, the rim of the wing 620 of the bush 600 is positioned inside the inner circumferential surface of the main body 120 as shown in FIG. 11 , and in the valve body 100 , the fixed body 140 has the bush 600 ) to protrude the stepped portion 141 for downwardly supporting the wing 620 .

Accordingly, the fixing body 140 is placed on the lower body 130 and fastened with a fastening ring 106 that is screwed, so that the fixing body 140 is assembled downward, and as a result, the fixing body ( 140) is to support the edge of the wing 620 of the bush 600 downward.

According to this configuration, it is possible to more effectively increase the adhesion between the rotary valve 200 and the valve plate 300 , thereby effectively preventing leakage of the refrigerant.

Hereinafter, the operation of another example of the integrated electronic expansion and direction switching valve according to the present invention will be described in detail with reference to the drawings.

For example, when an air conditioner of a vehicle, more preferably an electric vehicle, is cooled, the refrigerant flows into the input port 101 of the valve body 100 and the refrigerant is discharged through the first output port 102a. will be able

And, during heating, the refrigerant introduced into the input port 101 in the valve body 100 may be discharged through the second output port 102b.

At this time, the air conditioning controller of the electric vehicle sends an appropriate power or electrical signal to the step motor 520 to rotate the output shaft of the step motor 520 at a desired angle, and accordingly, the output shaft of the step motor 520 is The rotation valve 200 is rotated on the valve plate 300 .

These actions will be described in detail by dividing them according to the rotation angle of the rotary valve 200 as follows.

First, when the rotary valve 200 is rotated by the step motor 520 of the driving member 500 and the rotary valve 200 is positioned as shown in FIG. 18, the expansion recess of the rotary valve 200 ( Both the 210 and the flow hole 220 are in a closed state that does not overlap with any of the first through hole 311 and the second through hole 312 of the valve plate 300 .

Accordingly, all of the refrigerant supplied to the input port 101 of the valve body 100 is blocked and is not discharged to any of the first output port 102a and the second output port 102b.

In particular, the first through-hole 311 and the second through-hole 312 of the valve plate 300 are more reliably closed by the airtight member 400 provided in the rotary valve 200 .

However, when the rotation valve 200 is further rotated counterclockwise by approximately 60 degrees by the step motor 520 of the driving member 500 and the rotation valve 200 is positioned as shown in FIG. 19, the rotation Only the expansion recess 210 of the valve 200 overlaps with the first through hole 311 of the valve plate 300 while forming a minute expansion gap at the radially outer side.

At this time, the second through hole 312 of the valve plate 300 is maintained in a closed state by the rotation valve 200 .

In particular, the second through hole 312 of the valve plate 300 is securely closed by the airtight member 400 provided in the rotary valve 200 , and the first through hole 311 is the rotary valve 200 . An expansion gap is formed between the expansion recess 210 which is the outer peripheral surface of the valve body 230 formed inside the expansion recess 210 .

Accordingly, the refrigerant supplied to the input port 101 of the valve body 100 is an expansion gap formed between the expansion recess 210 of the rotary valve 200 and the first through hole 311 of the valve plate 300 . After being expanded in the air conditioner, cooling of the air conditioner is performed by being discharged to the first output port 102a.

Thereafter, when the rotary valve 200 is further rotated by about 60 degrees by the step motor 520 of the driving member 500 and the rotary valve 200 is positioned as shown in FIG. 20 , the rotary valve 200 By overlapping the channel hole 220 of the valve plate 300 with the first through hole 311 of the valve plate 300 in a wide cross-sectional area, the refrigerant does not expand and becomes a fully open state.

At this time, the second through-hole 312 of the valve plate 300 is continuously maintained in a closed state by the rotary valve 200 .

In particular, the second through-hole 312 of the valve plate 300 is more reliably closed by the airtight member 400 provided in the rotary valve 200 .

Accordingly, the refrigerant supplied to the input port 101 of the valve body 100 passes through the flow path hole 220 of the rotary valve 200 and the first through hole 311 of the valve plate 300 as it is without expansion. Then, it will be discharged to the first output port (102a).

And, when the rotary valve 200 is further rotated by about 60 degrees by the step motor 520 of the driving member 500 and the rotary valve 200 is positioned as shown in FIG. 21, the rotary valve 200 Both the expansion recess 210 and the flow hole 220 of the valve plate 300 are again in a closed state that does not overlap with any of the first through hole 311 and the second through hole 312 of the valve plate 300 .

In particular, the first through-hole 311 and the second through-hole 312 of the valve plate 300 are more reliably closed by the airtight member 400 provided in the rotary valve 200 .

Accordingly, the refrigerant supplied to the input port 101 of the valve body 100 is blocked again and is not discharged to any of the first output port 102a and the second output port 102b.

However, when the rotation valve 200 is further rotated counterclockwise by approximately 60 degrees by the step motor 520 of the driving member 500 and the rotation valve 200 is positioned as shown in FIG. 22, the rotation Only the expansion recess 210 of the valve 200 overlaps the second through hole 312 of the valve plate 300 while forming a fine expansion gap at the radially outer side.

At this time, the first through hole 311 of the valve plate 300 is continuously maintained in a closed state by the rotation valve 200 .

In particular, the first through hole 311 of the valve plate 300 is securely closed by the airtight member 400 provided in the rotary valve 200 , and the second through hole 312 is the rotary valve 200 . An expansion gap is formed between the expansion recess 210 which is the outer peripheral surface of the valve body 230 formed inside the expansion recess 210 .

Accordingly, the refrigerant supplied to the input port 101 of the valve body 100 is an expansion gap formed between the expansion recess 210 of the rotary valve 200 and the second through hole 312 of the valve plate 300 . After the expansion in the second output port (102b) by being discharged to the heating of the air conditioner is carried out.

Thereafter, when the rotary valve 200 is further rotated by about 60 degrees by the step motor 520 of the driving member 500 and the rotary valve 200 is positioned as shown in FIG. 23 , the rotary valve 200 By overlapping the channel hole 220 of the valve plate 300 with the second through hole 312 of the valve plate 300 with a wide cross-sectional area, the refrigerant does not expand and becomes a fully open state.

At this time, the first through hole 311 of the valve plate 300 is continuously maintained in a closed state by the rotation valve 200 .

In particular, the first through hole 311 of the valve plate 300 is more reliably closed by the airtight member 400 provided in the rotary valve 200 .

Accordingly, the refrigerant supplied to the input port 101 of the valve body 100 passes through the flow path hole 220 of the rotary valve 200 and the second through hole 312 of the valve plate 300 as it is without expansion. Then, it will be discharged to the second output port (102b).

Therefore, the integrated electronic expansion and direction switching valve of the present invention configured as described above enables precise control while simplifying the configuration of the vehicle air conditioner, and in particular, increases the airtightness of the refrigerant and the processability and productivity of the product to increase the production cost of the product It is an invention with the excellent advantage of maximizing market competitiveness while lowering the

In particular, by forming two output ports 102a and 102b in the valve body 100 and forming two through holes 311 and 312 in the valve plate 300, one It is also possible to circulate the refrigerant in different paths through the expansion valve of the

The above embodiment is an example for describing the technical idea of the present invention in detail, and the scope of the present invention is not limited to the above drawings or embodiments.

100: valve body 101: input port
102: output port 102a: first output port
102b: second output port 104: sealing
106: fastening ring 110: euro
120: main body 130: lower body
140: fixed body 141: stepped portion
150: cover 151: fastening means
160: main sealing 200: rotary valve
201: coupling hole 210: expansion recess
220: flow hole 230: valve body
300: valve plate 301: support groove
310: through hole 311: first through hole
312: second through hole 400: airtight member
500: driving member 510: shaft
511: shaft gear 520: step motor
521: output shaft gear 530: reduction gear
600: bush 610: boss
620: wing w: radial width of the expansion recess
W: radial width of the opening

Claims (5)

a valve body formed in a block shape and having an input port to which refrigerant is supplied to one side, an output port to which refrigerant is discharged to the other side, and a flow path for communicating the input port and the output port;
an expansion recess formed in a plate shape and rotatably provided in the circumferential direction within the flow path between the input port and the output port, the expansion recess extending in the circumferential direction with a predetermined radial width; a rotary valve communicating with and having a passage hole having a radial width wider than a radial width of the expansion recess;
a valve plate formed in a plate shape, stacked in contact with the rotary valve, fixed non-rotatably in the flow path of the valve body, and having a through hole formed along the circumferential direction;
an airtight member made of synthetic resin or an elastic airtight material and provided rotatably integrally on at least one surface of the rotary valve toward the valve plate to secure airtightness between the through hole of the valve plate and the rotary valve;
including a driving member for transmitting a rotational force to the rotary valve;
the expansion recess overlaps in the circumferential direction at the radially outer side of the through hole to form an expansion gap;
Electromagnetic expansion and direction change, characterized in that the airtight member and the rotary valve are formed in a polygonal or arc shape coupled to each other in contact with each other, so that the airtight member rotates integrally when the rotary valve is rotated integrated valve. delete According to claim 1, wherein the output port of the valve body comprises a first output port and a second output port formed independently of each other;
The through-holes of the valve plate include first and second through-holes spaced apart from each other in a circumferential direction to correspond to the first output port and the second output port, respectively;
Electronic expansion and direction switching integrated valve, characterized in that the refrigerant can be supplied by switching from one input port to one of two output ports. delete The method of claim 3, wherein the driving member comprises: a shaft connected to the rotation center of the rotation valve to rotate integrally; and a step motor capable of controlling a rotation angle according to power control and transmitting rotational force to the shaft;
The valve plate has an integrated electronic expansion and direction switching valve, characterized in that the support groove for rotatably supporting the lower end of the shaft is formed in the center.

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