JP4851915B2 - Motorized valve - Google Patents

Description

  The present invention relates to a motor-operated valve, and in particular, a first passage portion that communicates the first inlet / outlet, the second inlet / outlet, the third inlet / outlet, and the fourth inlet / outlet, the first inlet / outlet and the second inlet / outlet. In addition, a valve main body in which a second passage portion communicating the third inlet / outlet and the fourth inlet / outlet is formed, a valve shaft rotatably fitted in the valve main body, and a valve shaft that rotates the valve shaft. The present invention relates to an electric valve suitable for being incorporated in a reheat dehumidification circuit system of an air conditioner in place of some components such as a solenoid valve and a check valve conventionally used.

  Conventionally, a reheat dehumidification circuit system for an air conditioner includes, for example, a first heat exchanger 110 and a second heat exchanger 120 disposed in a room, a first electromagnetic valve, as shown in FIGS. 130, the second electromagnetic valve 140, the check valve 150, and the throttle member 160. When performing the cooling operation in the system 100 ′, the first electromagnetic valve 130 and the second electromagnetic valve 140 are opened as shown in (A), and the refrigerant flows from the outdoor unit as indicated by the white arrow. It is sent out to the outdoor unit through the first heat exchanger 110 and the second heat exchanger 120. Further, during the heating operation, the flow is the reverse of the above.

  On the other hand, when performing the dry (dehumidifying) operation, as shown in (B), the first electromagnetic valve 130 and the second electromagnetic valve 140 are closed, and the refrigerant is discharged from the outdoor unit as indicated by the white arrow. The first heat exchanger 110 → the check valve 150 → the throttle member 160 → the second heat exchanger 120 is sent to the outdoor unit.

  As described above, in the reheat dehumidification circuit system of the conventional air conditioner, it is necessary to connect the two solenoid valves 130, 140, the check valve 150, and the throttle member 160 in a predetermined manner, and the number of parts is large. The piping system is complicated, there are large restrictions on installation space and layout, and there is a hate that the apparatus cost becomes high. In this case, if the functions of several components such as two electromagnetic valves and check valves can be integrated into one valve, most of the above problems can be solved.

  The present invention has been made in view of such circumstances, and the object of the present invention is to selectively open and close the four entrances and exits with a relatively simple configuration. In addition, some solenoid valves, check valves, etc., which are conventionally used in the reheat dehumidification circuit system of an air conditioner, have two valve functions such as two solenoid valves and check valves. An object of the present invention is to provide a motor-operated valve suitable for incorporation instead of a component.

  In order to achieve the above object, the motor operated valve according to the present invention communicates the first inlet / outlet, the second inlet / outlet, the third inlet / outlet, and the fourth inlet / outlet, the first inlet / outlet and the second inlet / outlet. A valve body formed with a first passage portion, a second passage portion communicating with the third entrance and the fourth entrance, and a valve shaft rotatably fitted in the valve body, Drive means for rotating the valve shaft.

  A third passage portion is formed between the first passage portion and the second passage portion in the valve body, and the first communication passage communicates the third passage portion and the first passage portion; A first valve that is formed with a second communication passage that communicates the third passage portion and the second passage portion, and that selectively opens and closes the first passage portion and the third passage portion on the valve shaft. A body and a second valve body for selectively opening and closing the second passage portion are provided so as to be integrally rotatable at a predetermined angular interval, and by rotating the valve shaft, the first inlet / outlet and the second valve body are provided. Between the inlet / outlet and between the third inlet / outlet and the fourth inlet / outlet, and between the first inlet / outlet and the fourth inlet / outlet and between the second inlet / outlet and the third inlet / outlet. The first operation state in which the gap is closed, the gap between the first inlet / outlet and the second inlet / outlet, and the gap between the third inlet / outlet and the fourth inlet / outlet are closed. And a second operating state in which a gap between the first inlet / outlet and the fourth inlet / outlet or a gap between the second inlet / outlet and the third inlet / outlet is opened. .

  In a preferred aspect, the first passage portion and the second passage portion, and the first valve body and the second valve body are spaced apart by 180 ° around the valve shaft, and the third passage portion is the first passage portion. An angle interval of 90 ° is provided around the valve shaft with respect to the first and second passage portions.

  In another preferred aspect, a throttle member is interposed in the third passage portion. In this case, the throttle member is preferably configured by attaching a sound deadening porous body on both sides of the throttle element.

  In another preferred aspect, the valve body includes an angular interval of 180 ° between the first passage portion and the second passage portion of the valve body and the third passage portion around the valve shaft. A fourth passage portion is formed at a position opened, and a third communication passage that connects the fourth passage portion and the first passage portion, and a communication between the fourth passage portion and the second passage portion. A fourth communication passage is formed, and the second valve body selectively opens and closes the second passage portion and the fourth passage portion to rotate the valve shaft, thereby the first inlet / outlet and the second passage Between the inlet / outlet and between the third inlet / outlet and the fourth inlet / outlet, and between the first inlet / outlet and the fourth inlet / outlet and between the second inlet / outlet and the third inlet / outlet. The first operation state in which the gap is closed, the gap between the first inlet / outlet and the second inlet / outlet, and the gap between the third inlet / outlet and the fourth inlet / outlet are closed. And, together with between the first inlet and outlet and the fourth inlet and outlet is opened, and a second operation state while is opened and the second inlet and outlet and the third inlet and outlet are thus obtained.

  In the electric valve according to the present invention, when the valve shaft and the first valve body and the second valve body provided integrally therewith are in the first rotational position (first operation state), for example, the first valve body The third passage portion is closed, and the first passage portion and the second passage portion are opened. Thereby, between the 1st entrance / exit and the 2nd entrance / exit and between the 3rd entrance / exit and the 4th entrance / exit, it opens between the 1st entrance / exit and the 4th entrance / exit. And the third entrance / exit are closed. Therefore, at this time, fluid (refrigerant) can be circulated through the first passage portion that communicates the first inlet / outlet and the second inlet / outlet, and the third inlet / outlet is communicated with the fourth inlet / outlet. The fluid (refrigerant) can be circulated through the second passage portion.

  On the other hand, by rotating the valve shaft by 90 °, for example, in one direction from the first operation state, the first valve body and the second valve body are also rotated integrally with the valve shaft to enter the second operation state. The valve body and the second valve body close the first passage portion and the second passage portion, and the third passage portion is opened. This closes between the first inlet / outlet and the second inlet / outlet and between the third inlet / outlet and the fourth inlet / outlet, and between the first inlet / outlet and the fourth inlet / outlet or the second inlet / outlet. There is an opening between the exit and the third entrance / exit. Accordingly, at this time, the fluid (refrigerant) flows, for example, from the third inlet / outlet → second passage portion → second communication passage → third passage portion → first communication passage → first passage portion → second inlet / outlet. It flows sequentially.

  Here, if a throttling member is interposed in the third passage portion, the motor-operated valve of the present invention is the first and second reheat dehumidifying circuit system 100 ′ shown in FIGS. 24 (A) and 24 (B). 2 The functions of the solenoid valves 130 and 140, the check valve 150, and the throttle member 160 can be achieved. That is, as shown in FIGS. 12A and 12B, the motor-operated valve 10 according to the present invention is replaced with the first and second electromagnetic valves 130 and 140, the check valve 150, and the throttle member 160. By incorporating it into the thermal dehumidification circuit system 100 and setting it to the first operation state as shown in FIG. 12 (A), cooling / heating operation can be realized as in FIG. 24 (A), and FIG. By setting the second operation state as described above, the dry operation can be realized as in FIG.

  As described above, the motor-operated valve of the present invention can selectively open and close the four inlets / outlets with a relatively simple configuration, such as two solenoid valves and check valves. It can be incorporated in place of several components such as an electromagnetic valve and a check valve conventionally used in a reheat dehumidification circuit system of an air conditioner. Therefore, in the reheat dehumidification circuit system in which the motor-driven valve of the present invention is incorporated, the number of parts can be reduced, the piping system can be simplified, the installation space and layout can be reduced, the device cost can be reduced, and the like. .

Hereinafter, embodiments of the motor-operated valve of the present invention will be described with reference to the drawings.
1 and 2 show a first embodiment of a motor-operated valve according to the present invention. As shown in FIGS. 12A and 12B, the motor-operated valve 1 of this embodiment is incorporated in a reheat dehumidification circuit system 100 that requires substantially the same function as that shown in FIG. 1 to 12, (A) shows the cooling / heating operation, and (B) shows the dry operation. 1 (A) and 1 (B) show a longitudinal section at the center in the front-rear direction, and FIG. 2 (A) shows an XX section in FIG. 6 (A) and a YY section in FIG. 8 (A). FIG. 2B shows a composite cross section of the X′-X ′ cross section of FIG. 6B and the Y′-Y ′ cross section of FIG. 8B. Moreover, FIGS. 3-11 has shown the horizontal cross section of the principal part in cross-section # 1- # 9 position shown by FIG. 1 (B), respectively.

  The motor-operated valve 1 of the illustrated embodiment includes a short columnar valve body 10, a valve shaft 20 that is rotatably inserted in the valve body 10, and a drive unit for rotating the valve shaft 20. Stepping motor 50 is provided.

  The valve body 10 has a laminated structure in which an upper block 15, an intermediate plate 16, and a lower block 17 are sequentially arranged between a top plate 13 and a bottom plate 11, and the stepping motor is mounted on the top plate 13. 50 is mounted and held. The upper block 15 and the lower block 17 are configured by laminating a plurality of plate materials vertically.

  The stepping motor 50 has a structure well known per se, and includes a rotor 52 coupled to the valve shaft 20 so as to be integrally rotatable, a bottomed cylindrical can 55 disposed so as to cover the rotor, A coil 54 or the like disposed on the outer periphery of the can 55 is provided, and the valve shaft 20 is rotated in the forward and reverse directions around the rotation axis O in a predetermined angle range according to a control signal (pulse) sent from an external control means. It is designed to rotate (about 90 ° here).

  A central hole 30 into which the valve shaft 20 is rotatably inserted is formed at the center of the valve body 10, and a first insertion is provided at an angular interval of 180 ° around the valve shaft 20 on the right and left of the bottom plate 11. An outlet (joint) 41 and a third inlet / outlet (joint) 43 are provided (cross section # 9), and are respectively located on the right and left of the top plate 13, that is, directly above the first inlet / outlet 41 and the third inlet / outlet 43. An inlet / outlet (joint) 42 and a fourth inlet / outlet (joint) 44 are provided (cross-section # 1), the first passage portion 31 that communicates the first inlet / outlet 41 and the second inlet / outlet 42, and the first A second passage portion 32 that communicates the 3 inlet / outlet 43 and the fourth inlet / outlet 44 is formed.

  Further, an angular interval of 90 ° is provided between the first passage portion 31 and the second passage portion 32 in the valve body 10, in other words, around the valve shaft 20 with respect to the first and second passage portions 31 and 32. A third passage portion 33 (sections # 2 to # 8) is formed at the same circumferential position, and as shown in FIG. 4 (section # 2), the third passage portion 33 and the first passage portion 33 A first communication path 35 communicating with the passage section 31 is formed, and as shown in FIG. 10 (cross section # 8), a second communication path communicating the third passage section 33 and the second passage section 32 is formed. A passage 36 is formed.

  Further, as shown in FIG. 6 (cross section # 4), the central angle is formed in the right-side portion (including the first passage portion 31 and the third passage portion 33) of the lower end portion of the upper block 15 of the valve body 10. A fan-shaped first valve chamber 37 with a rounded corner in plan view of 90 ° is formed, and as shown in FIG. 8 (cross section # 6), the left side portion of the upper end portion of the lower block 17 of the valve body 10 A fan-shaped second valve chamber 38 having a substantially rounded corner in plan view with a central angle of 90 ° is formed in (including the second passage portion 32 and the third passage portion 33).

  On the other hand, the valve shaft 20 selectively opens and closes the first passage portion 31 and the third passage portion 33, and the first valve body having an elongated fan shape with a substantially rounded corner in plan view with a central angle of about 30 °. 21 and a second valve body 22 having the same shape as the first valve body 21 that opens and closes the second passage portion 32 are provided around the valve shaft 20 so as to be integrally rotatable at an angular interval of 180 °. . Here, as shown in FIG. 6 (section # 4) and FIG. 8 (section # 6), the first valve body 21 is slidably disposed in the first valve chamber 37, and the first valve body 37 is slidable. The two-valve body 22 is slidably disposed in the second valve chamber 38.

  In addition to the above, as shown in FIGS. 2 and 7 (cross section # 5), a throttle member 25 is mounted and fixed to the intermediate plate 16 portion in the third passage portion 33. The diaphragm member 25 has a structure in which a sound deadening porous body is attached to both upper and lower sides of the diaphragm element.

  In the motor-operated valve 1 of the present embodiment configured as described above, when performing the cooling / heating operation, the valve shaft 20 and the first valve body 21 and the second valve body 22 provided integrally therewith include: The first rotational position (first operation state) as shown in FIG. At this time, the first valve body 21 closes the third passage portion 33 and the first passage portion 31 and the second passage portion 32 are opened. Thereby, between the 1st entrance / exit 41 and the 2nd entrance / exit 42 and between the 3rd entrance / exit 43 and the 4th entrance / exit 44, it opens, and between the 1st entrance / exit 41 and the 4th entrance / exit 44 And between the second inlet / outlet 42 and the third inlet / outlet 43 are closed. Therefore, at this time, the fluid (refrigerant) can be circulated through the first passage portion 31 that communicates the first inlet / outlet 41 and the second inlet / outlet 42, and the third inlet / outlet 43 and the fourth inlet / outlet 43. A fluid (refrigerant) can be circulated through the second passage portion 32 communicating with the outlet 44.

  On the other hand, when performing the dry operation, the valve shaft 20 is rotated, for example, 90 ° in one direction (clockwise) from the first operation state. As a result, the first valve body 21 and the second valve body 22 also rotate together to enter the second operation state as shown in FIG. 1 to FIG. 11B, and the first valve body 21 and the second valve body. 22 closes the first passage portion 31 and the second passage portion 32, and the third passage portion 33 is opened. This closes between the first inlet / outlet 41 and the second inlet / outlet 42 and between the third inlet / outlet 43 and the fourth inlet / outlet 44, and as shown in FIG. A connection between the third entrance 43 and the second entrance 42 is opened. Therefore, at this time, the fluid (refrigerant) is, for example, the third inlet / outlet 43 → the second passage portion 32 → the second communication passage 36 → the third passage portion 33 → the throttle member 25 → the first communication passage 35 → first. It flows sequentially from the passage portion 31 to the second entrance / exit 42.

  Therefore, in the motor-operated valve 1 of the present embodiment, the flow path is switched as described above, and the throttle member 25 is interposed in the third passage portion 33. Therefore, FIGS. 24 (A) and 24 (B) In the reheat dehumidification circuit system 100 ′ shown in FIG. 1, the functions of the first and second electromagnetic valves 130 and 140, the check valve 150, and the throttle member 160 can be achieved. That is, as shown in FIGS. 12A and 12B, the motor-operated valve 10 of this embodiment is replaced with the first and second electromagnetic valves 130 and 140, the check valve 150, and the throttle member 160. By incorporating the reheat dehumidification circuit system 100 into the first operation state as shown in FIG. 12A, cooling / heating operation can be realized as in FIG. 24A, and FIG. ), The dry operation can be realized as in FIG. 24B.

  As described above, the motor-operated valve 1 according to the present embodiment has a relatively simple configuration in which the two valve bodies 21 and 22 are attached to the valve shaft 20 and rotated about 90 ° in both the forward and reverse directions. It is possible to selectively open and close the two inlet / outlet ports 41, 42, 43, and 44, and has a plurality of valve functions such as two solenoid valves and check valves, and a reheat dehumidification circuit system for an air conditioner. It can be incorporated in place of some components such as a solenoid valve and a check valve conventionally used. Therefore, in the reheat dehumidification circuit system or the like in which the electric valve of this embodiment is incorporated, the number of parts can be reduced, the piping system can be simplified, the installation space and layout can be reduced, and the apparatus cost can be reduced. it can.

  13 and 14 show a second embodiment of the motor-operated valve according to the present invention. The motor-operated valve 2 of the present embodiment is used as a four-way valve in a refrigeration cycle of an air conditioner and the basic structure is substantially the same as the motor-operated valve 1 of the first embodiment described above. Portions having the same configuration functions as the respective portions of the valve 1 are denoted by the same reference numerals, and in the following, differences from the motor-operated valve 1 of the first embodiment will be mainly described. 13 and 15 to 23, (A) shows the first operation state (for example, during heating operation), (B) shows the second operation state (for example, during cooling operation), and FIG. ) And (B) show different cross sections in the second operation state (for example, during cooling operation). 13A and 13B show a longitudinal section at the center in the front-rear direction, FIG. 14A shows a U-U section of FIG. 17A, and FIG. 14B shows FIG. The VV cross section of (B) is shown. 15 to 23 show horizontal sections of main parts at the positions of the sections # 1 to # 9 shown in FIG. 13B, respectively, as described above.

  In the motor-operated valve 2 of the second embodiment, an angular interval of 180 ° between the first passage portion 31 and the second passage portion 32 in the valve body 10 and the third passage portion 33 around the valve shaft 20. As shown in FIG. 22 (cross section # 8), as shown in FIG. 22 (cross section # 8), the fourth passage portion 34 is formed at the position where the gap is opened, and the third communication passage 45 that communicates the fourth passage portion 34 and the first passage portion 31. As shown in FIG. 16 (cross-section # 2), a fourth communication path 46 that connects the fourth path portion 34 and the second path portion 32 is formed.

  In the motor-operated valve 2 having such a configuration, in the first operation state shown in FIGS. 13 and 15A to 23A, between the first inlet / outlet 41 and the second inlet / outlet 42 and the third inlet / outlet 43. Between the first inlet / outlet 41 and the fourth inlet / outlet 44 and between the second inlet / outlet 42 and the third inlet / outlet 43 are closed. ) Can be distributed through the first passage portion 31 and the second passage portion 32.

  On the other hand, in the 2nd operation state shown in Drawing 13 and Drawing 15 (B) of Drawing 23, between the 1st entrance / exit 41 and the 2nd entrance / exit 42, the 3rd entrance / exit 43, and the 4th entrance / exit 44 is closed, and the first inlet / outlet 41 and the fourth inlet / outlet 44 are opened, and the second inlet / outlet 42 and the third inlet / outlet 43 are opened. As shown in FIG. 14A, the fluid (refrigerant) is, for example, the third inlet / outlet 43 → the second passage portion 32 → the second communication passage 36 → the third passage portion 33 → the first communication passage 35 → While flowing sequentially from the first passage portion 31 to the second inlet / outlet 42, as shown in FIG. 14B, the fluid (refrigerant) is, for example, the first inlet / outlet port 41 → first passage portion 31 → third. The flow passes from the communication passage 45 → the fourth passage portion 34 → the fourth communication passage 46 → the second passage portion 32 → the fourth inlet / outlet 44.

  Therefore, in the motor-operated valve 2 of the present embodiment, since the flow path is switched as described above, it can be used as a four-way valve in a refrigeration cycle of an air conditioner or the like. In this case, the motor-operated valve 2 according to the present embodiment has a very simple configuration in which the two valve bodies 21 and 22 are attached to the valve shaft 20 and rotated about 90 ° in both the forward and reverse directions. Etc. can be achieved.

The longitudinal cross-sectional view of the center of the front-back direction of 1st Embodiment of the motor operated valve which concerns on this invention. 6A is a composite cross-sectional view of the XX cross section of FIG. 6A and the YY cross section of FIG. 8A. FIG. 6B is a cross-sectional view of the X′-X ′ cross section of FIG. The composite sectional view of the Y'-Y 'section of 8 (B). The horizontal sectional view in section # 1 position shown in Drawing 1 (B). The horizontal sectional view in section # 2 position shown in Drawing 1 (B). The horizontal sectional view in section # 3 position shown in Drawing 1 (B). The horizontal sectional view in section # 4 position shown in Drawing 1 (B). The horizontal sectional view in section # 5 position shown in Drawing 1 (B). The horizontal sectional view in section # 6 position shown in Drawing 1 (B). The horizontal sectional view in section # 7 position shown in Drawing 1 (B). The horizontal sectional view in section # 8 position shown in Drawing 1 (B). The horizontal sectional view in section # 9 position shown in Drawing 1 (B). The figure which shows the reheat dehumidification circuit system in which the motor operated valve of 1st Embodiment was integrated. The longitudinal cross-sectional view of the center of the front-back direction of 2nd Embodiment of the motor operated valve which concerns on this invention. (A) is UU sectional drawing of FIG. 17 (A), (B) is VV sectional drawing of FIG. 17 (B). FIG. 14 is a horizontal sectional view at the position of the cross section # 1 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 2 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 3 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 4 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 5 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 6 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 7 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 8 shown in FIG. FIG. 14 is a horizontal cross-sectional view at the position of cross-section # 9 shown in FIG. The figure which shows the conventional reheat dehumidification circuit system.

Explanation of symbols

1, 2 Electric valve 10 Valve body 20 Valve shaft 21 First valve body 22 Second valve body 25 Throttle member 31 First passage portion 32 Second passage portion 33 Third passage portion 34 Fourth passage portions 35, 36 Communication passage 37 , 38 Valve chamber 41 First inlet / outlet 42 Second inlet / outlet 43 Third inlet / outlet 44 Fourth inlet / outlet 45, 46 Communication path 50 Stepping motor

Claims (7)

1st entrance / exit, 2nd entrance / exit, 3rd entrance / exit, 4th entrance / exit, 1st channel | path part which connects the 1st entrance / exit and 2nd entrance / exit, and 3rd entrance / exit and 4th entrance / exit An electric motor comprising a valve body having a second passage portion communicating with the outlet, a valve shaft rotatably fitted in the valve body, and a driving means for rotating the valve shaft. A valve,
A third passage portion is formed between the first passage portion and the second passage portion in the valve body, and a first communication passage that connects the third passage portion and the first passage portion and the first passage A first valve body that is formed with a second communication passage that connects the three passage portions and the second passage portion, and that selectively opens and closes the first passage portion and the third passage portion on the valve shaft; The motor-operated valve, wherein the second valve body that selectively opens and closes the second passage portion is provided so as to be integrally rotatable with a predetermined angular interval.   By rotating the valve shaft, the first inlet / outlet and the second inlet / outlet and the third inlet / outlet are opened, and the first inlet / outlet and the fourth inlet / outlet are opened. A first operation state in which a gap between the first inlet and outlet and a gap between the second inlet and outlet and the third inlet and outlet are closed; and between the first inlet and outlet and the second inlet and outlet; And the second operation state in which the space between the first inlet / outlet and the fourth inlet / outlet or the second inlet / outlet is opened is obtained. The motor-operated valve according to claim 1, wherein the motor-operated valve is configured as described above.   The first passage portion and the second passage portion, and the first valve body and the second valve body are spaced at an angular interval of 180 ° around the valve shaft, and the third passage portion is the first and second passage portions. The motor-operated valve according to claim 1 or 2, wherein an angle interval of 90 ° is provided around the valve shaft with respect to the passage portion.   The motor-operated valve according to any one of claims 1 to 3, wherein a throttle member is interposed in the third passage portion.   The motor-operated valve according to claim 4, wherein the throttle member is configured by attaching a silencing porous body on both sides of the throttle element.   A fourth passage portion is formed between the first passage portion and the second passage portion in the valve body and at a position spaced apart from the third passage portion by 180 ° around the valve shaft. And a third communication passage that communicates the fourth passage portion and the first passage portion, a fourth communication passage that communicates the fourth passage portion and the second passage portion, and the first communication passage. The two-valve body selectively opens and closes the second passage portion and the fourth passage portion and rotates the valve shaft, so that the two valve bodies are located between the first inlet and outlet and the third inlet and outlet. And the fourth inlet / outlet are opened, and the first operating state in which the gap between the first inlet / outlet and the fourth inlet / outlet and between the second inlet / outlet and the third inlet / outlet are closed, Between the first inlet / outlet and the second inlet / outlet and between the third inlet / outlet and the fourth inlet / outlet, the first inlet / outlet and the fourth inlet / outlet are closed. 4. The second operation state in which a gap between the second entry and exit and the third entry and exit is opened is obtained. 5. The motor-operated valve according to item.   A reheat dehumidification circuit system for an air conditioner in which the electric valve according to claim 4 is incorporated.

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