KR101159281B1 - Derection control valve for air conditioner - Google Patents

Abstract

The present invention relates to an air conditioner direction control valve, the air conditioner direction control valve according to the present invention is a direction control valve for air conditioners installed in a combined air-conditioning and air conditioner to determine the movement direction of the fluid according to the output stage is selected In this case, an input stage and a plurality of output stages through which fluid is introduced and discharged are formed, and a housing is installed at both ends to seal the inside thereof, and is installed to drive inside the housing, and any one of the plurality of output stages is selected during driving. A valve body portion including a switching spool through which the fluid introduced into the housing is discharged; A piezoelectric element formed so as to deform in one direction, the piezoelectric element being installed at the side of the valve body; And an interlocking portion positioned between the valve body portion and the piezoelectric element portion to drive the switching spool according to the deformation of the piezoelectric element. Thereby, a direct current power source can be used by driving the direction control valve using a piezoelectric element, thereby preventing the relay phenomenon of the control unit, there is provided an air conditioner direction control valve that does not generate noise during driving.

Piezoelectric Element, Directional Control Valve, Switching Valve, Plunger

Description

Direction control valve for air conditioner {Derection control valve for air conditioner}

The present invention relates to a direction control valve for an air conditioner, and more particularly, to a direction control valve for an air conditioner in which noise is not generated by operating a spool using a piezoelectric element.

In general, a combined heat and heat pump air conditioner for controlling air flow in a hydraulic or high pressure circuit to realize cooling and heating is widely used.As a well known heat and cooling combined heat pump air conditioner, heat is naturally transferred from a high temperature side to a low temperature side. In order to move heat from the low temperature side to the high temperature side, some action must be applied from the outside.

Such a heat pump air conditioner has a transport mechanism for heat that is transferred to a cycle consisting of compression, condensation, expansion and evaporation of a refrigerant, and generates the cold air required for cooling or the warm air required for heating through heat exchange during condensation and evaporation.

The choice of cooling or heating can be done by changing the positions of the heat exchangers (condensers and evaporators) used in the condensation and evaporation processes, but it is practically impossible to change the positions of the condensers and evaporators. The control valve is used to convert the refrigerant flow to the condenser and the evaporator.

1 is a flow chart of the air conditioner when the air conditioner using a conventional four-way control valve, Figure 2 is a flow chart of the air conditioner when heating using a conventional four-way control valve.

1 and 2, the conventional four-way control valve is composed of a four-port two-position solenoid-hydraulic actuating valve of the inner filer type combined with the main valve 10 and the pilot valve 20.

The main valve 10 has four ports (P, B, R, A) and two pilot connection ports located at both ends. The main valve 10 has four refrigerant connecting pipes for connecting each port to the discharge and intake ports of the compressor 10A among the air conditioner elements, the outdoor heat exchanger 10B, and the indoor heat exchanger 10C, respectively. It is connected.

The pilot valve 20 is a four-port two-position spring offset solenoid operated type, connected to the main valve through four capillaries, and installed to be converted through a solenoid coil 27.

At this time, by moving the pilot spool 25 to the normal position by the spring 26 or the conversion position by the electromagnetic force when the solenoid coil 27 is excited, one of the load side ports A and B is connected to the supply side port P, and the other Is connected to the drain side port R. The excitation current of the solenoid coil 27 is cut off at the cooling operation of the air conditioner and is applied only at the heating operation.

In this case, as shown in FIG. 1, when the cooling operation is selected, the pilot spool 25 is in a normal position, and the pilot pressure in one chamber 15 of the main valve 10 is higher than the other chamber 16. Works. Then, the main spool 17 of the main valve 10 is moved to the left side so that the supply side port P is connected to the load side port R.

Therefore, in the air conditioner, the refrigerant discharged from the discharge port of the compressor 10A is transferred to the outdoor heat exchanger 10B through ports P and A of the main valve 10, so that the outdoor heat exchanger 10B serves as a condenser. From the indoor heat exchanger 10C, a refrigeration cycle in which the refrigerant is transferred to the inlet port of the compressor 10A through the ports B and R of the main valve 10 is performed.

On the other hand, when the heating operation is selected, as shown in Figure 2, the pilot spool 25 is moved to the conversion position by the solenoid coil 27, wherein the pilot pressure of the other chamber 16 of the main valve 10 is one side It acts higher than the chamber 15. Then, the main spool 17 of the main valve 100 is moved to the right side so that the supply side port P is connected to the load side port B and the other load side port A is connected to the drain side port R.

Therefore, in the air conditioner, the refrigerant discharged from the discharge port of the compressor 10A is transferred to the indoor heat exchanger 10C through ports P and B of the main valve 10, so that the indoor heat exchanger 10C serves as a condenser. And the refrigerant decompressed by the expansion mechanism 10D is transferred to the outdoor side heat exchanger 10B, so that the outdoor side heat exchanger 10B acts as an evaporator, and from the outdoor side heat exchanger 10B. Is a heat cycle in which the refrigerant is transferred to the inlet of the compressor 10A through the ports A and R of the main valve 10.

Such a pilot valve 20 may be referred to as a direction control valve because it is installed to change the direction of the main spool 17 in the main valve 10.

In addition, such a directional control valve is used as a solenoid-operated valve, and is widely used due to the advantages of easy control such as automatic operation or remote operation, and quick and accurate conversion time.

Thus, the four-way control valve as described above is installed in the air conditioner, the main valve is a hydraulic operation type, it was common to configure the direction control valve for operating the solenoid operation type.

However, the direction control valve has a problem in that noise is generated when the internal spool is driven by using the solenoid coil.

In addition, since the electromagnetic thrust of the solenoid coil is used, the specification of the solenoid coil must be changed according to the installation location, and in particular, there is an unsuitable problem when a large flow rate is to be controlled.

In addition, since the spool of the main valve must be moved by using a solenoid coil, an AC power source must be used as a large power source is required, and accordingly, a power supply must be accompanied by a relay of a controller.

Accordingly, an object of the present invention is to provide a directional control valve for an air conditioner capable of driving the directional control valve using a piezoelectric element.

In addition, the present invention provides a directional control valve for an air conditioner which is driven by using a piezoelectric element so that no noise occurs during driving.

In addition, the present invention provides a direction control valve for an air conditioner that can use a DC power supply by using a piezoelectric element.

In addition, the present invention provides a directional control valve for an air conditioner by using a DC power supply, which does not require a relay of a controller.

The above object is, according to the present invention, in the air conditioner direction control valve installed in the air-conditioning combined air conditioner to determine the moving direction of the fluid according to the selected output stage to implement the cooling, the input stage and the plurality of output stages in which the fluid is introduced and discharged And a switching spool having a cover installed at both ends to seal the inside thereof, and installed to drive inside the housing, wherein any one of the plurality of output terminals is selected during driving to discharge the fluid introduced into the housing. Valve body portion including; A piezoelectric element formed so as to deform in one direction, the piezoelectric element being installed at the side of the valve body; And an interlocking portion positioned between the valve body portion and the piezoelectric element portion to drive the switching spool according to the deformation of the piezoelectric element.

Here, the interlocking portion rotates in combination with the support member installed in the piezoelectric element portion, one side is coupled to the switching spool, the other side is coupled to the support member and the drive member is installed to protrude to the outside of the housing, It may include an interlocking member for rotating the piezoelectric element to drive the drive member.

In addition, the switching spool is shorter than the length in the longitudinal direction of the valve body portion, it is preferable that the outer diameter of the switching spool is formed to substantially coincide with the inner diameter of the valve body portion is arranged to slide in the valve body portion. .

On the other hand, the interlocking member, one side engaging with the piezoelectric element, the engaging groove is formed to receive the piezoelectric element to be indented, the other side is a link portion coupled to rotate to the support member, and one side is the link portion and Is coupled, the other side is provided to abut the protruding side of the drive member, it may include a pressing portion for pressing the drive member to move in one direction in conjunction with the link unit rotation.

At this time, it is preferable to further include an elastic member which is installed to be elastically compressed and restored by the sliding movement of the switching spool between any one of the cover provided on both ends of the housing and the switching spool.

In addition, both ends of the switching spool is installed in contact with the inner surface of the housing is further provided with a blocking member for blocking the outflow of the fluid contained in the switching spool, the blocking member is in contact with the inner surface of the housing It is preferable that it is formed so as to obliquely downward in both directions.

On the other hand, the switching spool may be driven to rotate about the central axis of the valve body portion in the valve body portion when driving.

Here, the interlocking member, a coupling groove is formed on one side to be coupled to the piezoelectric element so as to receive the piezoelectric element, the engaging portion is coupled to rotate to the support member, the other side is the other side of the link portion And the other side may be installed to be in contact with one side of the driving member, and may include a pressurizing portion that presses the driving member to rotate in one direction by interlocking with the link unit.

In addition, the drive member is coupled to the switching spool, the drive shaft protruding outward of the housing, the drive body coupled to the drive shaft, the first extension and the second extension extending to the outside of the drive body is formed It includes a portion, wherein the pressing portion is accommodated in the separation space formed by the first extension and the second extension, it is preferably accommodated to be in contact with any one of the first extension and the second extension.

In addition, the housing is preferably formed with a long groove in the longitudinal direction on the inner surface of the input end.

In addition, the switching spool is formed in each of the first communication path and the second communication path penetrating in the thickness direction in the longitudinal direction, respectively, the separation distance between the inlet of the first communication path and the inlet of the second communication path It is preferable that the distance is shorter than the length of.

In addition, the outlet of the first communication path is preferably formed to substantially coincide with any one of the plurality of output terminals of the housing when the long groove of the housing and the inlet of the first communication path coincides.

Further, the inlet and the outlet of the second communication path are formed to form the same angle with respect to the inlet and the outlet of the first communication path, respectively, so that the inlet of the second communication path is rotated by the switching spool. When coinciding with the long groove of the housing, the outlet of the second communication path is preferably formed to substantially coincide with any one of the plurality of output ends of the housing.

On the other hand, the piezoelectric element portion may include a device housing installed on the side of the valve body portion, one side is fixed to the device housing, the other side may include a piezoelectric element installed to be deformed in any one direction by the applied voltage. .

In this case, it is preferable that a link hole is formed at the end portion of the piezoelectric element so as to be coupled to the linking part.

According to the present invention, there is provided a direction control valve for an air conditioner capable of driving a direction control valve using a piezoelectric element.

In addition, there is provided a direction control valve for an air conditioner which is driven by using a piezoelectric element so that no noise occurs during driving.

In addition, there is provided a direction control valve for an air conditioner that can use a DC power supply by driving using a piezoelectric element.

In addition, there is provided a directional control valve for an air conditioner which can prevent a relay phenomenon in the control unit by using a DC power supply.

Prior to the description, components having the same configuration are denoted by the same reference numerals as those in the first embodiment. In other embodiments, configurations different from those of the first embodiment will be described do.

Hereinafter, a direction control valve for an air conditioner according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view of a direction control valve for an air conditioner according to a first embodiment of the present invention. 3, the air conditioner direction control valve 1 according to the first embodiment of the present invention is installed on one side of the main valve (M), the valve body portion 100 and the piezoelectric element portion 200 and It is configured to include an interlock 300.

4 is a schematic view of the valve body portion of FIG. Referring to FIG. 4, the valve body part 100 includes a housing 110, a switching spool 120, a blocking member 140, and an elastic member 150.

The housing 110 is long in one direction and is formed in an empty hollow shape, and has one input terminal 111 and a plurality of output terminals with respect to the vertical direction in the longitudinal direction so that fluid is introduced into and discharged from the interior of the housing 110. The first output terminal 112 and the second output terminal 113 is formed.

In addition, covers 121 and 122 are provided at both ends of the housing 110 to seal the inside of the housing 110.

At this time, each of the covers 121 and 122 is formed with air holes 121a and 122a communicating with the outside so as to allow the entrance and exit of air, and each of the air holes 121a and 122a has a predetermined value. It is connected to communicate with each other through a communication tube such as a capillary tube (L).

As a pair of air holes are connected in such a manner as to be connected to each other, the air is positioned at the front of the sliding movement direction of the switching spool 120 to remove the air at the portion where the internal pressure rises and at the same time switching the removed air. It can use as a means to pressurize so that the sliding movement of the spool 120 may be easy.

For example, in the illustrated state, assuming that the switching spool 120 to be described later moves to the left side, the interior of the empty space a located in front of the switching spool 120 according to the sliding movement of the switching spool 120. The pressure gradually rises.

At this time, the air (air) is discharged through the air hole (122a) by the rising pressure of the sliding movement direction of the switching spool 120 through the air hole (121a) formed in the right cover 121 through the capillary tube (L) It flows into the empty space b at the rear to press the switching spool 120.

That is, the switching spool 120 is moved in accordance with the deformation of the piezoelectric element 200 to be described later, wherein the air in the housing 110 is circulated as described above, the sliding movement of the switching spool 120 is more piezoelectric. The force is applied not only by the deformation force of the element part 200 but also by the pressure caused by air.

As a result, the switching spool 120 may be slidably moved even with a small driving source.

In addition, the air holes 121a and 122a are connected to communicate with each other, thereby being blocked from the outside. That is, when each of the air holes 121a and 122a communicates with the outside, fine dust or the like is introduced into the housing 110 from the outside to be bound to the inner wall of the housing 110.

As a result, the bound fine dust or the like becomes an element that inhibits the movement of the switching spool 120 when the switching spool 120 is moved. That is, the air holes 121a and 121b communicate with each other in a blocked state with the outside, thereby preventing the above problems.

On the other hand, any one of both cover (121, 122) (shown left cover) is a predetermined guide hole so that the drive member 320 of the interlocking portion 300 to be described later to move to the inside and outside of the housing 110 122c is formed.

At this time, it is preferable that an oil bush 122b for suppressing friction generated when the driving member 320 moves in and out of the peripheral portion of the guide hole 122c is further installed.

Next, the switching spool 120 is formed to have a length shorter than the longitudinal direction of the housing 110, and is installed to slide in the housing 110.

At this time, the switching spool 120 is formed to be spaced apart from the first communication path 131 and the second communication path 132 to move the fluid such as the refrigerant therein.

Here, the outlets 131b and 132b of each communication path 131 and 132 may communicate with the inlet 131a and 132a of each communication path 131 and 132 in communication with the input end 111 of the housing 110. When positioned, it is formed to communicate with the first output terminal 112 and the second output terminal 113 of the housing (110).

That is, when the inlet 131a of the first communication path 131 is positioned to communicate with the input terminal 111 of the housing 110, the outlet 131b of the first communication path 131 is connected to the first output terminal 112. The switching spool 120 is slidably moved so that the inlet of the second communication path 132 is in communication with the input end 111 of the housing 110. The outlet 132b of the second communication path 132 is positioned. Is formed to communicate with the second output terminal 113.

As a result, the fluid introduced through the input end 111 is selected by any one of the output end by the sliding movement of the switching spool 120 is discharged through the communication path to the selected output end.

Next, the blocking member 140 is coupled to both ends of the switching spool 120 by a predetermined coupling means, and formed to be in contact with the inner surface of the housing 110, the portion is in contact with the inner wall of the housing 110 The housing 110 is formed to be inclined downward in both directions with respect to the longitudinal direction, and is preferably provided in pairs at both ends.

That is, the switching spool 120 is a state in which the fluid is embedded in the communication paths formed therein, in this state the fluid embedded in the fine gap of the switching spool 120 and the housing 110 during the sliding movement switching spool 13 The phenomenon of outflow will occur.

At this time, the leakage of the fluid embedded in the switching spool 120 may be prevented through the blocking member 140.

In addition, the blocking member 140 has a portion in contact with the housing 110 is formed in the form inclined downward in both directions with respect to the longitudinal direction of the housing 110, so that the switching spool 120 and the inner wall of the housing 110 when moving; Friction can be minimized.

The elastic member 150 is provided with a predetermined spring, and is installed between the cover 121 and the switching spool 120 on the opposite side where the driving member 320 of the linking unit 300 to be described later is installed (not shown). Bar is to the right). The elastic member 15 installed as described above is elastically compressed and restored by the sliding movement of the switching spool 120.

Next, FIG. 5 is an enlarged view of the piezoelectric element and the linkage of FIG. 3, FIG. 6 is an exploded perspective view of the piezoelectric element and the linkage of FIG. 5, and FIG. 7 is a cross-sectional view of the linkage and the piezoelectric element of FIG. 5.
5 to 7, the piezoelectric element unit 200 includes a device housing 210 and a piezoelectric element 220.

The device housing 210 is formed in a hollow form in the form of a panel of a predetermined thickness, one side is formed in an open form is coupled to the side of the valve body portion (100).

In addition, a predetermined groove or hole is formed in the upper and lower side surfaces of the central region so that the protruding end 224 of the piezoelectric element 220 to be described later is coupled, and the support member 310 of the interlocking part 300 to be described later is formed in the open side. A predetermined groove or hole may be formed to couple both ends of the.

The piezoelectric element 220 is formed in a long panel shape in one direction, and includes a center plate 221, a first side plate 222, and a second side plate 223, and receives a predetermined voltage in one direction. It is formed to be deformed.

The center plate 221 is provided with a metal material, and the first side plate 222 and the second side plate 223 are bonded to both sides of the center plate 221 using a predetermined adhesive.

In this case, the first side plate 222 may be made of a ceramic material, and the second side plate 223 may be made of a material such as polytetrafluoroethylene.

In addition, a protruding end 224 protruding from both sides of the piezoelectric element 220 is formed in the central region of the piezoelectric element 220 so that the piezoelectric element 220 is installed in the above-described element housing 210. The free end 220a of the 220 has a link hole 225 to which the interlocking member 300 to be described later is coupled.

When the piezoelectric element 220 is installed in the device housing 31, the fixed end 220b is coupled to the closed side of the device housing 210 and fixed, and the protruding end 224 is coupled to the coupling groove.

In this coupled state, when a voltage is applied to both sides of the piezoelectric element through a predetermined power source (not shown), the free end 220a, which is a deformation side of the piezoelectric element 220 located on the open side of the device housing 210, is formed. Deformation is caused in the outward direction of the housing 210.

In addition, although not shown, the wiring for applying a voltage to the piezoelectric element 220 is preferably installed close to the fixed end 220b because it does not cause interference when the free end is deformed.

On the other hand, when the piezoelectric element portion 200 as described above and the side of the valve body portion 100 is coupled to the free end 220a of the piezoelectric element 220 is installed so as to be adjacent to the valve body portion 100 It is possible to optimize the configuration of the linking unit 20 to be described later configured to link the deformation direction of (220a).

Next, the interlock 300 includes a support member 310, a driving member 320, and an interlocking member 330.

The support member 310 is a member provided in the form of a shaft, and both ends thereof are coupled to the open side of the device housing 210 of the piezoelectric element unit 200 described above.

In addition, the coupling member 330 to be described later, the coupling member 330 is coupled to rotate around the support member 310.

The driving member 320 is coupled to the side end portion of the switching spool 120 so that one side is interlocked with the switching spool 120 described above, and the other side is installed to protrude out of the housing 110 through the cover 122. .

The interlocking member 330 is composed of a link portion 331 and the pressing portion 332.

The link portion 331 has a locking groove 331a is formed so that one side receives the link hole 225 of the piezoelectric element 220 described above, and the inner side of the link portion 331 is engaged, and the other side is supported to be coupled to the support member 310 described above. The hole 331b is formed.

One side of the pressing portion 332 is coupled to the other side of the link portion 331, the other side is installed to abut the protruding side of the drive member 320 described above.

 Meanwhile, referring to FIG. 7, the link hole 225 of the piezoelectric element 220 is accommodated in the engaging groove 331a of the link part 331 of the linking member 330 of the linking part 300. That is, when the piezoelectric element 220 is deformed to the outside of the device housing 210 by applying a predetermined voltage, the link hole 225 is deformed, and thus the link unit 225 is supported by the support member 310. At the same time as the rotation of the pressing portion 332 is coupled to rotate in the direction opposite to the rotation direction of the link portion 225.

The operation of the first embodiment of the directional valve for the air conditioner described above will now be described. 8 is a system circuit diagram including a directional valve for the air conditioner according to the first embodiment of the present invention in the cooling mode, Figure 9 is a system circuit diagram including a directional valve for the air conditioner according to the first embodiment of the present invention in the heating mode to be.

Referring to FIG. 8, the direction change valve for the air conditioner according to the first embodiment of the present invention is connected through four capillaries to interlock with the main valve M, which is a 4-port 2-position.

Specifically, the direction change valve 1 for the air conditioner according to the first embodiment of the present invention is connected by a capillary tube (L1) (L2) connecting both output terminals 112, 113 and both sides of the main valve (M) The input terminal 111 is connected to the input terminal of the main valve M through a capillary tube L3.

In addition, the capillary (L4) (L5) for connecting between each capillary (L1) (L2) and the capillary (M3) is further installed, each of the capillary (L4) (L5) may be further provided with a check valve. .

The direction change valve 1 for the air conditioner installed as described above is preferably prevented from flowing out of the refrigerant by allowing the fluid discharged from both sides of the main valve M to be introduced again through the input terminal 111.

In this cooling mode selection, the switching spool 120 is moved to the left direction, and thus the fluid introduced through the input terminal 111 is transferred through the second output terminal 113 through the second communication path 132. The discharged fluid is discharged into the main valve M, and the main spool M1 of the main valve M is moved to the left.

In addition, while the main spool M1 of the main valve M moves to the left side, the fluid contained in the left side of the main spool M1 moves along the capillary tube L1 and the capillary tube L5 to allow the capillary tube L2 to move. Will join.

Hereinafter, since the moving path of the fluid discharged through the output port from the main valve (M) and circulating the compressor and the condenser is the same as in the prior art, a detailed description thereof will be omitted.

Cooling operation is possible through the flow of the fluid, and if the heating mode is selected in such a cooling mode state, as shown in FIG. 9, a predetermined voltage is applied to the piezoelectric element 220. The interlocking member 330 coupled with the link hole 225 is rotated and the pressing unit 332 presses the protruding side of the driving member 320 so that the switching spool 120 moves to the right.

At this time, the air on the right side of the switching spool 120 is moved to the left side of the switching spool 120 through the capillary tube L to apply a force to move the switching spool 120, the switching spool 120 The elastic member 150 is installed on the right side of the elastic compression.

In addition, after the switching spool 120 moves to the right, the inlet of the first communication path 131 and the input terminal 111 communicate with each other, and the fluid is introduced through the first communication path 131. The fluid is discharged through the first output terminal 112 in communication with the outlet.

Thereafter, the discharged fluid moves along the capillary tube L1 and flows to the left side of the main valve M, whereby the main spool M1 moves to the right side.

In addition, while the main spool M1 of the main valve M is moved to the right side, the fluid built in the right side of the main spool M1 moves along the capillary tube L2 and the capillary tube L4, thereby capillary tube L1. Will join.

Hereinafter, since the moving path of the fluid discharged from the main valve M through the output port and circulating the compressor and the condenser is the same as in the prior art, a detailed description thereof will be omitted.

As such, the switching spool 120 may be moved according to the deformation of the piezoelectric element 220 to select an output terminal of the introduced fluid, thereby configuring a system capable of selecting a cooling and heating mode.

On the other hand, when switching from the heating mode to the cooling mode, as shown in Figure 8, when the voltage applied to the piezoelectric element 220 is released, the link hole 225 is returned to its original state, accordingly, the interlocking member 330 Will return to its original state.

Then, the switching spool 120 is moved in the original position by the elastic restoring force of the elastic member 150, whereby air on the left side of the switching spool 120 is moved to the right through the capillary tube (L). As a result, a force is applied to the movement of the switching spool 120.

As a result, the switching spool 120 is moved completely to the left so that the circuit is connected in the same state as in the initial cooling mode.

When the direction switching valve is configured using the piezoelectric element as described above, conventional solenoids should be provided with various devices according to the use of AC power, and there is a problem in that a relay phenomenon occurs in converting AC power to DC power. The piezoelectric element can use a direct current power source so that no relay occurs. In addition, the piezoelectric element may be quickly responsive so that switching of the valve can be performed quickly.

Next, a direction switching valve for an air conditioner according to a second embodiment of the present invention will be described. In the second embodiment, compared with the first embodiment, the valve body portion and the interlocking portion are different, and the configuration of the piezoelectric element portion is the same, and thus the detailed description of the piezoelectric element portion is omitted.

10 is an exploded perspective view of the valve body portion according to the second embodiment of the present invention. Referring to FIG. 10, the valve body 400 according to the second embodiment of the present invention includes a housing 410, a pair of covers 421 and 422, and a switching spool 430.

FIG. 11 is a cross-sectional view taken along line AA ′ of FIG. 10. 10 and 11, the housing 410 is elongated in one direction, and the inside of the housing 410 is formed in a cylindrical hollow.

At this time, one side of the housing 410 is formed with an input end 411 so that the fluid is introduced, the other side is formed with a first output end 412 and the second output end 413 to discharge the fluid.

In addition, a long groove 414 is formed in the longitudinal direction of the housing 410 on the inner surface on which the input end 411 is formed.

On the other hand, the pair of covers 421 and 422 are coupled to both sides of the housing 410, the cover 422 shown on the right side of the pair of covers drive member 520 of the interlocking portion 500 to be described later ) Is coupled to the switching spool 430 is formed with a guide hole (422a) for guiding to protrude to the outside of the housing 410. That is, the guide hole 422a in the second embodiment has the same configuration as the guide hole 122c in the first embodiment.

FIG. 12 is a cross-sectional view taken along line BB ′ of FIG. 10. 10 and 12, the switching spool 430 is disposed inside the housing 410 and installed to rotate about the central axis of the housing 410.

In addition, the switching spool 430 penetrates in the thickness direction and is formed to be spaced apart in the longitudinal direction, and the first communication path 431 and the first spaced apart at a distance smaller than the length of the long groove 414 of the housing 410 described above. Two communication paths 432 are formed.

In this case, an angle a1 formed by the inlet of the first communication path 431 and the inlet of the second communication path 432 is formed by the inlet of the first communication path 431 and the outlet of the second communication path 432. It is formed to be equal to the angle a2.

13 is a coupling diagram of the housing and the switching spool according to the second embodiment of the present invention. Referring to FIG. 13, the switching spool 430 is disposed inside the housing 410 to rotate. At this time, the inlet of the first communication path 431 of the switching spool 430 is the long groove 414 of the housing 410. The fluid introduced through the input terminal 411 is coupled to the first communication path 431 through the long groove 411 to be discharged to the first output terminal 412.

In addition, the inlet of the second communication path 432 also coincides with a part of the long groove 414 by the rotation of the switching spool 430 at an angle, and the fluid introduced through the input end 411 at this time is the long groove 414. It passes through the second communication path 432 and is discharged to the outside through the second output terminal 413 matching the outlet of the second communication path 432.

That is, the distance d1 of each communication path is formed to be separated by a distance smaller than the length d2 of the long groove 414, thereby selectively selecting any one communication path through one input terminal 411 to discharge the fluid. can do.

In addition, the pair of covers 421 and 422 described above are coupled to both ends of the housing 410 to prevent the switching spool 430 from escaping out of the housing 410.

Next, the linkage unit according to the second embodiment of the present invention will be described. 14 is an exploded perspective view of the linkage unit according to the second embodiment of the present invention.

Referring to FIG. 14, the linking unit 500 according to the second embodiment of the present invention includes a supporting member 510, a driving member 520, and an interlocking member 530.

The support member 510 has the same configuration as that of the first embodiment, and is installed such that both ends thereof are supported by the element housing of the piezoelectric element portion.

The driving member 520 includes a driving shaft 521, a first extension part 522, and a second extension part 523. Here, the driving shaft 521 is coupled to the switching spool 430 so that one side is interlocked with the switching spool 430 described above, and the other side of the housing 410 through the guide hole 422a formed in the cover 432 described above. It is installed to protrude outward.

The first extension part 522 and the second extension part 523 extend from the driving shaft 521, and may include a rotation area 524 in which the pressing part 532 of the interlocking member 530 may be accommodated. It is formed spaced apart to secure.

15 is a coupling diagram of the driving member according to the second embodiment of the present invention. Referring to Figure 15, the interlocking member 530 is composed of a link portion 531 and the pressing portion 532, the link portion 531 is configured in the same manner as the first embodiment is combined with the piezoelectric element support member 510 is supported and installed to rotate, the pressing portion 532 is coupled to the link portion 531 and the other side is located between the rotation region of the drive member 520 described above, a pair of extensions ( It is installed to abut on the inner side of the first extension portion 522 of the (522) (523).

On the other hand, the piezoelectric element portion is configured in the same manner as in the first embodiment as described above so that the link hole of the piezoelectric element portion is interposed in the link portion in the above-described second embodiment so that the link portion interlocks with the deformation of the piezoelectric element. It is composed.

Next, the operating state of the direction change valve for the air conditioner according to the second embodiment of the present invention. The whole system can be connected to the main valve (M) through a plurality of capillaries as in the first embodiment, which has been described in the first embodiment, so in the second embodiment the switching spool is rotated according to the deformation of the piezoelectric element. Only the output stage is selectively selected.

16 is an operating state diagram of the interlocking member according to the second embodiment of the present invention in the cooling mode, and FIG. 17 is an operating state diagram of the switching spool according to the second embodiment of the present invention in the cooling mode. In the cooling mode, it is assumed that no voltage is applied to the piezoelectric element, that is, the piezoelectric element is not deformed.

Referring to FIG. 16, the link hole of the piezoelectric element 220 is indented by the link part 531, and the pressing part 532 coupled with the link part 531 is the first extension part of the driving member 520. It is located in contact with the inside of 522.

In this state, referring to FIG. 17, the switching spool 420 is positioned to coincide with the first communication path 431 and the long groove 414, and the exit of the first communication path is substantially the same as the first output end 412. The fluid introduced from the capillary tube L3 from the input end 411 of the housing 410 is discharged to the capillary tube L1 through the long groove 414 and the first communication path 431, and then the main The movement path of the fluid through the valve M is the same as in the first embodiment.

On the other hand, the piezoelectric element is deformed in one direction by applying a voltage to the piezoelectric element for switching to the heating mode.

18 is an operation state diagram of the piezoelectric element according to the present invention when the voltage is applied, FIG. 19 is an operation state diagram of the linkage unit according to the second embodiment of the present invention in the heating mode, and FIG. 20 is a second state of the present invention in the heating mode. The operating state diagram of the switching spool according to the embodiment.

Referring to FIG. 18, when a voltage is applied to the piezoelectric element 220 to implement a heating mode, the piezoelectric element 220 has a free end thereof deformed in one direction and is coupled to a link hole of the piezoelectric element 220. 531 and the pressing unit 532 also rotate in one direction in association with the deformation direction of the piezoelectric element.

Referring to FIG. 19, the pressing unit 532 is rotated and at the same time pressurizes the inner side of the second extension part 523 of the driving member 520, whereby the driving member 520 is rotated counterclockwise. .

Referring to FIG. 20, the switching spool 430 coupled to the driving member 520 by the driving member 520 rotated in the counterclockwise direction also rotates in the counterclockwise direction, so that the second communication formed in the switching spool 430 is performed. The inlet of the furnace 432 is coincident with the long groove 414 of the housing 410. At the same time, the outlet of the second communication path 432 is positioned to substantially coincide with the second output end 413 of the housing 432.

When the switching spool 430 rotates as described above and the second communication path 432 and the second output terminal 413 coincide with each other, the fluid supplied through the capillary tube L3 passes through the input terminal 411 and the long groove 414. The second communication path 432 passes through the second output terminal 413.

The subsequent path is to change the direction of the main valve (M) through the movement path of the fluid as in the first embodiment, thereby implementing the heating mode.

On the other hand, the switching from the heating mode to the cooling mode is made possible by releasing the voltage applied to the piezoelectric element 220.

That is, when the voltage applied to the piezoelectric element 220 is released, the piezoelectric element 220 rotates in the reverse direction of FIG. 18 to return to the original position. At this time, the pressing unit 532 rotates in the reverse direction of the moving direction in FIG. 19 and pressurizes the inner side of the first extension unit 522 to maintain the contact with the first extension unit 522 in its initial state. At the same time, the switching spool 430 rotates in the reverse direction of the rotational direction in FIG. 20 so that the long groove 414 and the first output end 412 of the housing 410 coincide with the first communication path 431. The fluid introduced through the first output stage 412 is discharged.

As described above, by selecting the output terminal according to the deformation of the piezoelectric element, it is possible to switch the heating and cooling modes, and the mode conversion is possible using only the piezoelectric element as compared with the conventional, so that a separate control unit is unnecessary. This makes the system simple to configure.

In addition, by using a piezoelectric element that is deformed by the applied voltage, noise generated when using a conventional solenoid coil is not generated.

In addition, the conventional solenoid coil used to drive the valve by the electronic thrust of the solenoid coil to change the specifications of the solenoid coil according to the installation location, but the direction switching valve according to the present invention is responsive by using a piezoelectric element It can be used up regardless of capacity, so it is not necessary to change the specification.

The scope of the present invention is not limited to the above-described embodiments but may be implemented in various forms of embodiments within the scope of the appended claims. Without departing from the gist of the invention claimed in the claims, it is intended that any person skilled in the art to which the present invention pertains falls within the scope of the claims described in the present invention to various extents which can be modified.

1 is a configuration diagram showing a cooling operation of a general air conditioner,

2 is a configuration diagram showing a heating operation of a general air conditioner,

3 is a perspective view of a directional control valve for an air conditioner according to a first embodiment of the present invention;

4 is a schematic view of the valve body of FIG.

5 is an enlarged view of the piezoelectric element and the linkage of FIG. 3;

6 is an exploded perspective view of the piezoelectric element and the linkage of FIG.

7 is a cross-sectional view of the interlocking portion and the piezoelectric element portion of FIG. 5;

8 is a system circuit diagram including a direction change valve for an air conditioner according to a first embodiment of the present invention in a cooling mode;

9 is a system circuit diagram including a directional valve for the air conditioner according to the first embodiment of the present invention in the heating mode,

10 is an exploded perspective view of the valve body portion according to the second embodiment of the present invention;

11 is a cross-sectional view taken along line AA ′ of FIG. 10;

12 is a cross-sectional view taken along line BB ′ of FIG. 10;

13 is a coupling diagram of a housing and a switching spool according to a second embodiment of the present invention;

14 is an exploded perspective view of a linkage unit according to a second embodiment of the present invention;

15 is a coupling diagram of a driving member according to a second embodiment of the present invention;

16 is an operating state of the interlocking member according to the second embodiment in the cooling mode;

17 is an operating state of the switching spool according to the second embodiment in the cooling mode;

18 is an operating state diagram of a piezoelectric element when voltage is applied;

19 is an operating state diagram of the linkage unit according to the second embodiment in the heating mode;

20 is an operating state diagram of the switching spool according to the second embodiment in the heating mode.

<Explanation of symbols for the main parts of the drawings>

100,400: valve body 110,410: housing 121,122,421,422: cover

130,430: switching spool 140: blocking member 150: elastic member

200: piezoelectric element portion 210: device housing 220: piezoelectric element

300,500: linkage 310,510: support member 320,520: drive member

330,530: Interlocking member 331,531: Link part 332,532: Pressing part

Claims (15)

In the direction control valve for the air conditioner is installed in the air-conditioning combined air conditioner to determine the direction of fluid movement depending on the output stage is selected, An input stage and a plurality of output stages through which fluid is introduced and discharged are formed, and a housing is installed at both ends to seal the inside thereof, and is installed to drive in the housing, and any one of the plurality of output terminals is selected to drive the housing. A valve body portion including a switching spool through which the fluid introduced into the outlet is discharged;  A piezoelectric element formed so as to deform in one direction, the piezoelectric element being installed at the side of the valve body; And an interlocking portion positioned between the valve body portion and the piezoelectric element portion to drive the switching spool according to the deformation of the piezoelectric element. And the switching spool is driven to rotate about the central axis of the valve body in the valve body when driven. delete delete delete delete delete delete The method of claim 1, The interlocking portion rotates in combination with a support member installed in the piezoelectric element portion, one side coupled with the switching spool, the other side protruded out of the housing, and coupled with the support member. It includes an interlocking member for driving the drive member by rotating in accordance with the deformation of, The interlocking member, One side engaging with the piezoelectric element is formed with a locking groove so as to receive the piezoelectric element to be indented, the other side is coupled to the support member to rotate; One side is coupled to the other side of the link portion, the other side is installed to be in contact with one side of the drive member, the air conditioner, characterized in that it comprises a pressurizing portion for pressing the drive member to rotate in one direction in conjunction with the link unit rotation. Direction control valve. 9. The method of claim 8, The driving member includes a driving shaft which is coupled to the switching spool and protrudes out of the housing, a driving body which is coupled to the driving shaft, and a first extension part and a second extension part which are formed to be spaced apart from the driving body. , The pressure control unit is accommodated in the separation space formed by the first extension and the second extension, the direction control valve for an air conditioner, characterized in that it is received so as to contact any one of the first extension and the second extension. 10. The method of claim 9, The housing is a direction control valve for the air conditioner, characterized in that the long groove is formed in the longitudinal direction on the inner side of the input end. The method of claim 10, The switching spools are formed with the first communication path and the second communication path penetrating in the thickness direction, respectively, being longitudinally spaced apart, and the distance between the inlet of the first communication path and the inlet of the second communication path is the length of the long groove. Directional control valve for air conditioners, characterized in that the shorter distance. 12. The method of claim 11, The outlet of the first communication path is formed so as to substantially coincide with any one of the plurality of output terminals of the housing when the long groove of the housing and the inlet of the first communication path coincides. . 13. The method of claim 12, The inlet and the outlet of the second communication path, The second communication path is formed to form the same angle with respect to the inlet and the outlet of the first communication path, respectively, when the inlet of the second communication path coincides with the long groove of the housing by rotating the switching spool. And the outlet of the air conditioner is formed so as to substantially coincide with any one of the plurality of output terminals of the housing. delete delete

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