JP2003314715A - Four-way change-over valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the smoothness and quickness of the action of changeover of a refrigerant passage. <P>SOLUTION: This four-way change-over valve is constituted of a motor part 10, and a main body part 50 equipped with a main valve 70 arranged in a valve chamber 73 and a valve seat 80. The valve seat is equipped with a suction pressure leading hole 82 and a discharge pressure leading hole 83, and leading holes 84 and 85 communicating with a heat exchanger. The main valve is equipped with a low pressure communication recessed part 75 for selectively communicating with the suction pressure leading hole and the two communication holes, and a high pressure communication recessed part 74 for selectively communicating with the discharge pressure leading hole and the two communication holes. The main valve is also provided with a pressure equalizing hole 77 communicating the low pressure communication recessed part with the valve chamber 73, and a communication hole 76 for communicating the high pressure communication recessed part and the valve chamber. A shut-off valve supporting body 60 interlocks with rotations of the motor part and has a first shut-off valve 63 and a second shut-off valve 64. The pressure equalizing hole and the communication hole are selectively opened and closed by the first shut-off valve 63 the second shut-off valve 64, and the main valve is moved so as to change over the flow passage when the communication hole is closed and the pressure equalizing hole is opened. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-way switching valve, and more particularly, to a four-way switching valve that allows the main valve to float above a valve seat during the switching operation of the main valve to facilitate the switching operation of the main valve. Regarding

[Prior art]

Generally, an air conditioner used as a room air conditioner or the like can perform a cooling operation or a heating operation by switching the flowing direction of the refrigerant, and the switching direction of the refrigerant is switched by a switching valve. FIG. 11 shows an example of a cooling / heating cycle of an air conditioner using a switching valve. The heating / cooling cycle includes a compressor C and a switching valve S.
V, heat exchanger (condenser) E1, heat exchanger (evaporator) E
2 and the electronic linear control valve T are connected, and the refrigerant during the cooling operation is the compressor C and the switching valve S as shown by the solid arrow.
V, the outdoor heat exchanger E1, the electronic linear control valve T, and the indoor heat exchanger E2 flow in this order, the switching valve SV, and the compressor C again.
Circulate back to. The refrigerant during the heating operation is, as indicated by the one-dot chain line arrow, the compressor C, the switching valve SV, the indoor heat exchanger E.
2. The electronic linear control valve T and the outdoor heat exchanger E1 flow in this order, the switching valve SV, and then the compressor C again for circulation.

As an example of the switching valve, various four-way switching valve technologies have been proposed. For example, utility model registration No. 25
In the technology of the four-way switching valve described in JP-A-23031, switching of the refrigerant flow path between the discharge pressure communication hole and the communication hole, the suction pressure communication hole and the communication hole in the valve body is performed inside and outside the main valve. ing.

However, in this technique, a low-pressure suction pressure is generated inside the main valve and a high-pressure discharge pressure is generated outside the main valve. Therefore, a pressure difference occurs across the main valve, so that the switching operation is performed. In this respect, the four-way switching valve does not take into consideration the ease and agility of the switching operation of the refrigerant passage. In addition,
According to the technique of the four-way switching valve described in Japanese Patent No. 32389, switching operation of the refrigerant passage by the main valve is performed after eliminating the pressure difference in the valve body, but the main valve is rotated by expansion and contraction of the elastic member. Therefore, no particular consideration is given to the agility of the switching operation of the refrigerant flow path and the reliability of the four-way switching valve.

[0005]

Therefore, the applicant of the present invention is
In order to solve the above problems, Japanese Patent Application No. 2000-330 is first mentioned.
Japanese Patent Application No. 377 and Japanese Patent Application No. 2001-147265 provide a four-way switching valve whose object is to improve the smoothness of the switching operation of the refrigerant passages. The present invention is a further improvement of the present invention, and its object is to further improve the smoothness and agility of the switching operation of the refrigerant flow passages, and further improve the reliability as a switching valve. It is to provide a four-way switching valve capable of

[0006]

In order to achieve the above object, the motor-operated valve according to the present invention comprises the following means.
The four-way switching valve according to claim 1 is a four-way switching valve including a motor unit including a stator and a rotor, a main body unit including a case, a main valve disposed in a valve chamber in the case, and a valve seat. The valve seat includes a suction pressure communication hole and a discharge pressure communication hole that communicate with the suction pressure side and the discharge pressure side of the compressor, respectively, and two conductions that communicate with the indoor and outdoor heat exchangers, respectively. The main valve includes a hole, and the main valve has a low-pressure communication recess that selectively communicates with the suction pressure communication hole and the two communication holes, and a high-pressure communication that selectively communicates with the discharge pressure communication hole and the two communication holes. The main valve includes a recess, a pressure equalizing hole that communicates the low-pressure communication recess and the valve chamber, and a communication hole that communicates the high-pressure communication recess and the valve chamber. Provided with a stop valve support that is linked to the rotation of
The closing valve support is provided with a first closing valve and a second closing valve, and the first closing valve and the second closing valve can selectively open and close the pressure equalizing hole and the communication hole. At the same time, the main valve is moved to switch the flow paths when the communication hole is closed and the pressure equalizing hole is open.

The four-way switching valve according to a second aspect is characterized in that, in addition to the means according to the first aspect, the main valve is separated from the upper surface of the valve seat during the above movement. Claim 3
In addition to the means according to claim 1 or 2, the four-way switching valve described includes, as a means for rotating the closing valve support, a drive tooth part that rotates integrally with the rotor and a passive tooth part provided on the closing valve support side. A drive unit is formed, and the drive unit is formed so that torque can be amplified.

A four-way switching valve according to a fourth aspect of the present invention is a four-way switching valve.
In addition to any of the means described in 3, the first closing valve and the second closing valve are characterized in that they are supported by a closing valve support body in a resilient pressure state on the main valve side.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a four-way switching valve 100 of the present invention will be described below with reference to the drawings. 1 is an external perspective view of a four-way switching valve according to an embodiment of the present invention, FIG.
1A is a vertical cross-sectional view of FIG. 1, and FIG. 2B is A of FIG.
-A sectional drawing, FIG. 3 is a perspective view of the main-body part of the same four-way switching valve, and FIG. 4 is a bottom view of the main valve of the same four-way switching valve. In the following description, the meaning of “upper, lower, left, right” means “upper, lower, left, right” in the drawings, and does not necessarily mean “upper, lower, left, right” in actual use.

The four-way switching valve 100 of the illustrated embodiment comprises a motor section 10 having a stepping motor and a main body section 50 having a main valve 70. The main valve 70 is energized by the motor section 10. The valve is rotated on the valve seat 80 to switch the refrigerant flow path. The motor unit 10 includes a stator 20 and a rotor 40. The stator 20 includes a stator coil 21 and a yoke 22 that are vertically stored, and the stator coil 21 includes a cable 23 in which lead wires are bundled. A connector 24 is connected to the outer periphery of the.

The main body 50 includes a case 30 and a case 30.
A main body case 51 that is airtightly connected and fixed to the lower end of the
Main valve 70 and stop valve support 60 disposed on main valve 70
A valve seat 80 and a conduit group 90. The motor portion 10 is fitted onto the case 30, and the rotor 40 and the like are fitted inside.

The rotor 40 is inserted into a support shaft 42 and has a magnet on its outer circumference. Further, a drive unit 47 is integrally fixed to the lower portion of the rotor 40 via a connecting ring frame 41. A drive tooth portion 48 is formed on the outer periphery of the lower portion of the drive portion 47 over a predetermined height.

The lower part of the support shaft 42 is rotatably supported in the support shaft hole 71 of the main valve 70, and the main valve 70 is also supported.
Side 46 and the support shaft 42 side, the push spring 46 attached between
Is elastically supported above. Also, the support shaft 4
The upper end of 2 is rotatably supported by the case 30.

An integrally joined main body case 51 is formed in the lower portion of the case 30, and a valve seat 80 made of stainless steel or the like is fitted in the lower portion of the main body case 51 to connect the main body case 51 and the valve seat 80. Are fixed together. The valve seat 80 constitutes the bottom of the valve chamber 73, is connected to the lower end of the main body case 51 by a joint 81, and has a suction pressure conduction hole 82 for introducing the suction pressure of the compressor and a discharge pressure conduction for introducing the discharge pressure. A hole 83, an outdoor heat exchanger communication hole 84 communicating with the outdoor and indoor heat exchangers, and an indoor heat exchanger communication hole 85 are provided, and these holes 82 to 85 are formed so as to penetrate vertically. Has been done.

On the lower surface of each of the holes 82 to 85,
As the conduit group 90, a suction pressure conduit 9 made of copper alloy or the like
2, discharge pressure conduit 93, conduit 9 for outdoor heat exchanger
4 and a conduit tube 95 for the indoor switchboard are connected. The upper end of the discharge pressure conducting pipe 93 projects above the upper surface of the valve seat 80, that is, into the high pressure communication recess 74, and has a function of a stopper against the movement of the main valve 70. The upper surface of the valve seat 80 has a flat shape, and the main valve 7 is
It is in contact with the lower end surface of 0.

The communicating holes 82 to 85 will be described in more detail. As shown in FIGS. 2A and 2B, the suction pressure communicating hole 82 and the discharge pressure communicating hole 83 are symmetrical with respect to the center of the valve seat 80. The conduction hole 84 for the outdoor heat exchanger and the conduction hole 85 for the indoor heat exchanger are provided at the position,
They are provided at symmetrical positions with respect to the central portion of the valve seat 80, separated from the suction pressure conducting hole 82 and the discharge pressure conducting hole 83 by a predetermined angle.

The conduit group 90 includes a suction pressure conducting pipe 92 connected to the suction pressure conducting hole 82, a discharge pressure conducting pipe 93 connected to the discharge pressure conducting hole 83, and the conducting hole 8.
4 is composed of a conduit pipe 94 for the outdoor heat exchanger connected to the No. 4 and a conduit pipe 95 for the indoor exchanger connected to the conduit hole 85, which are respectively connected and fixed to the lower portion of the valve seat 80.

The main valve 70 is made of, for example, synthetic resin, is housed in a valve chamber 73 inside the case 30, and has a valve seat 8
The upper surface of 0 is rotatably and slidably mounted on the support shaft 42 so as to be pivotally supported. As shown in FIGS. 2 to 4, the main valve 70 has a circular shape in plan view, has a predetermined height, and has a central recessed portion 7 at the center thereof.
2, a support shaft hole 71 is bored, and a lower surface has a high-pressure communication recess 74 and a low-pressure communication recess 75 which are curved along the circumferential direction and have a predetermined depth.

A communication hole 76 communicating with the upper valve chamber 73 is formed in the high pressure communication recess 74, and a pressure equalizing hole 77 communicating with the upper valve chamber 73 is formed in the low pressure communication recess 75. To be done. In this embodiment, the pressure equalizing hole 77 has a diameter larger than that of the communication hole 76. Further, a shaft pin 78 that pivotally supports the shutoff valve support body 60 is erected on the upper surface of the main valve 70, and an interlocking protrusion 79 that is loosely fitted in a later-described recessed hole 60b is erected in the vicinity thereof. Has been done.

On the upper surface of the main valve 70, a shutoff valve support 60 is provided.
Are arranged. The shut-off valve support 60 is particularly shown in FIGS.
As shown in FIG. 2, the passive tooth portion 65 is formed in a columnar shape over a predetermined angle on its side surface, and the passive tooth portion 65 is arranged so as to mesh with the drive tooth portion 48.

A rotary shaft hole (no reference numeral) is formed at the center of the shutoff valve support 60, and a recessed hole 60b having a predetermined width is formed on the periphery of the rotary shaft hole in the vicinity of the passive tooth portion 65. Is formed in a penetrating state. The stop valve support body 60 is rotatably supported by a shaft pin 78. In addition, as described above, the interlocking protrusion 79 is loosely fitted in the recess 60b, and the closing valve support 60 is configured to be rotatable by a predetermined angle with respect to the main valve 70. The first stop valve 63 and the second stop valve slidable up and down are provided in the holes provided at two positions of the stop valve support body 60.
The stop valve 64 is fitted and inserted, and the stop valves 63 and 64 are mounted so as to be pressed downward by the stop valve spring 66 and the stop valve spring 67, respectively. And the stop valve support 60
Is formed so as to be rotatable with respect to the main valve 70 by a concave hole 60b at an angle within a predetermined range, and the first closing valve 63 selects the communication hole 76 or the pressure equalizing hole 77 by the rotation of the closing valve support body 60. The second closing valve 64 is arranged so as to open and close the communication hole 76 by the rotation of the closing valve support body 60. In other words, the rotation of the closing valve support member 60 with respect to the main valve 70 selectively opens or closes the communication hole 76 or the pressure equalizing hole 77.

Next, the specific operation of the four-way switching valve 100 will be described. FIG. 5: is explanatory drawing (A), (B) which shows the cooling state of the same four-way switching valve, and FIG. 6 is explanatory drawing (A), (B), the figure which shows the switching operation 1 from the same cooling state to heating. 7 is
It is explanatory drawing (A), (B) which shows the switching operation 2 from the same cooling state to heating. FIG. 8: is explanatory drawing (A), (B) which shows the heating state of the same four-way switching valve, FIG. 9: explanatory drawing (A), (B), the figure which shows the switching operation 1 from the heating state to cooling. 10 is an explanatory view (A) and (B) showing the switching operation 2 from the same heating state to cooling, and FIG. 11 is a cycle configuration diagram during the heating and cooling operation.

In order to switch the refrigerant flow path (switch between cooling and heating) using the four-way switching valve 100, the stator coil 21 is energized and excited by the switching switch (not shown) through the cable 23 and the connector 24. The motor unit 10 is driven to rotate the rotor 40,
The support shaft 42 is rotated through the rotation of 0. Then, the stop valve support body 6 is driven through the drive unit 47 integrated with the support shaft 42.
0 is rotated (rotated) on the main valve 70. The rotation of the stop valve support body 60 opens and closes the communication hole 76 or the pressure equalizing hole 77, and the further rotation of the support shaft 42 causes the main valve 70 integrated with the stop valve support body 60 to move to the center of the support shaft 42. Then, the valve is rotated on the valve seat 80 (the main valve 70 rotates and the closing valve support 60 revolves) to switch the flow of the refrigerant as described later.

(Switching from Cooling to Heating) Next, specific switching of cooling and heating will be described with reference to FIGS. First, switching from cooling to heating will be described. (Cooling state-FIG. 5) FIG. 5 shows a state before switching from cooling to heating (cooling state). Depending on the position of the closing valve support body 60 with respect to the main valve 70, the pressure equalizing hole 77 is first closed. Valve 6
3, the communication hole 76 is "closed" and the communication hole 76 is "open". In this state, the discharge pressure communication hole 83 from the compressor C and the communication hole 84 to the outdoor heat exchanger E1 communicate with each other through the high pressure communication recess 74 of the main valve 70. Also, the main valve 70
The suction pressure communicating hole 82 to the compressor C and the communicating hole 85 from the indoor heat exchanger E2 communicate with each other through the low pressure communicating recess 75 (see solid arrow in FIG. 11). Also, the interlocking protrusion 7
9 is at the center position of the recessed hole 60b, and one end of the high-pressure communication recess 74 is in contact with the upper end of the discharge pressure conducting pipe 93.

In this state, in the four-way switching valve 100, the high pressure communication recess 74 communicates with the valve chamber 73 by "opening" the communication hole 76, and the refrigerant pressure in the valve chamber 73 becomes the refrigerant in the high pressure communication recess 74. It is almost the same as the pressure. On the other hand, the low-pressure communication recess 75 on the low-pressure side is in a low-pressure state because it is “closed” by the second closing valve 64. As a result, the shutoff valve support body 60 is pressed toward the main valve 70 side by the high refrigerant pressure from the valve chamber 73, and the main valve 70 and the shutoff valve support body 60 are kept highly airtight, and the smooth refrigerant is provided. Has been realized.

(Switching operation: FIG. 6) When switching from the cooling state in FIG. 5 to heating, the switch of the motor section 10 is turned on. When this is turned on, the rotor 40 is rotated, and the drive tooth portion 48 is rotated by a predetermined angle of the drive portion 47.
And the passive tooth portion 65 mesh with each other and rotate, and the shutoff valve support body 60 rotates by a predetermined angle as shown by the arrow in FIG.
The main valve 70 does not move (rotate) because it is in contact with the discharge pressure conducting pipe 93. The state of the shutoff valve support body 60 after rotation is shown in FIG. 6, in which the main valve 70 does not rotate and the interlocking protrusion 79 does not engage with the wall surface of the recessed hole 60b.
Until the valve abuts on one end of the recess 60b.
Only rotate. In this state, the second shutoff valve 64 closes the communication hole 76 and opens the pressure equalizing hole 77.

As a result of the communication hole 76 being closed, not only the high-pressure refrigerant in the high-pressure communication recess 74 is not supplied to the valve chamber 73, but the high-pressure refrigerant in the valve chamber 73 is also supplied to the low-pressure communication recess 77 via the pressure equalizing hole 77. As a result, the refrigerant pressure in the valve chamber 73 decreases. Therefore, the refrigerant pressure from below is greater than the refrigerant pressure from the valve chamber 73 with respect to the main valve 70, and the main valve 70 floats above the valve seat 80 to form the gap 86. Due to the formation of the gap 86, the rotation of the shutoff valve support body 60 is smooth.

(Movement of main valve: FIG. 7) In this smooth rotation state, the interlocking protrusion 79 is in contact with the wall surface of the recess 60b, and the main valve 70 is closed by further rotation of the closing valve support 60. With the valve support 60, the support shaft 42 rotates about the valve seat 80 as shown by the arrow in FIG. 7B (the closing valve support 60 revolves, the main valve 70 rotates). . The state after this rotation is shown in FIG. Then, the other end of the high-pressure communication recess 74 contacts the discharge pressure conducting pipe 93, and the rotations of the shutoff valve support body 60 and the main valve 70 are stopped.

As a result, the discharge pressure conducting hole 83 and the conducting hole 85 communicate with each other through the high pressure communicating recess 74, and
The communication hole 84 and the suction pressure communication hole 82 communicate with each other via the low-pressure communication recess 75. That is, the switching of the refrigerant flow paths has been performed. And in this switching, the main valve 7
0 rotates in a state of being lifted from the valve seat 80, and the main valve 70 rotates smoothly.

(Heating state: FIG. 8) Pressure equalizing hole 77 shown in FIG.
Is open and the communication hole 76 is closed, the motor unit 10 is programmed to automatically reverse the drive unit 47 by a predetermined angle. As a result, as shown in FIG. 8, in the state where the other end of the high pressure communication recess 74 abuts the discharge pressure conducting pipe 93 and the rotation of the main valve 70 is stopped, the shutoff valve support 60 moves in the opposite direction. Rotate (Fig. 8
In the first shutoff valve 63, the pressure equalizing hole 77 is “closed” and the communication hole 76 is “open”. As a result, the refrigerant pressure in the valve chamber 73 increases, the main valve 70 is pressed against the valve seat 80, and the refrigerant flows from the discharge pressure conducting pipe 93 to the conducting pipe 95 via the high pressure communicating recess 74, and Therefore, the gas smoothly flows from the conduit 94 to the suction pressure conduit 92 via the low-pressure communication recess 75 while maintaining high airtightness. With the above, the switching from the cooling state to the heating state is completed.

(Switching from Heating to Cooling) Next, switching from heating to cooling will be described with reference to FIGS. (Heating state-FIG. 8) FIGS. 8A and 8B show a heating state before switching, and as described above, communication is performed depending on the positional relationship between the valve seat 80, the main valve 70, and the closing valve support body 60. The hole 76 is "open" and the pressure equalizing hole 77 is "closed". Further, in this state, the interlocking protrusion 79 has the concave hole 60b.
Of the high pressure communicating recess 74, and the other end of the high pressure communicating recess 74 is in contact with the upper end of the discharge pressure conducting pipe 93.

(Operation of the shutoff valve support body, FIG. 9) By turning on the heating switch, the support shaft 42 is supported by the motor unit 10.
Rotates, and the stop valve support body 60 rotates by a predetermined angle as shown by the arrows in FIGS. 9 (A) and 9 (B). During this time, the rotating concave hole 60b does not engage with the interlocking protrusion 79, so that the rotational force is not transmitted to the main valve 70. During the rotation of the stop valve support 60,
The communication hole 76 is "closed" and the pressure equalizing hole 77 is "open". As a result, the refrigerant pressure in the valve chamber 73 decreases, so that the refrigerant pressure with respect to the main valve 70 becomes larger in the lower portion, and the main valve 70 floats above the valve seat 80 due to the differential pressure of the refrigerant pressure. .

(Movement of main valve, FIG. 10) In this floating state, the concave hole 60b is engaged with the interlocking protrusion 79 with further rotation of the support shaft 42 (arrow shown in FIG. 10B), After engagement, rotation of the stop valve support 60 (revolution, Fig. 10 (B))
The arrow (shown in FIG. 10) causes the main valve 70 to rotate in conjunction therewith (arrow shown in FIG. 10A). During this time, since the main valve 70 is in the floating state, the flow path switching is smoothly performed according to the rotation of the main valve 70. Then, as shown in FIG. 10, the second shutoff valve 6
4 makes the communication hole 76 "closed" and the pressure equalizing hole 77 "open". The movement of the main valve 70 is stopped when one end of the high-pressure communication recess 74 contacts the discharge pressure conducting pipe 93. In this state, the refrigerant flow path is switched, and as shown in FIG. 10, the discharge pressure conducting pipe 93 is passed through the high pressure communicating recess 74.
And the suction pipe 94 are communicated with each other through the low pressure communication recess 75. At this point, the refrigerant flow path is switched from heating to cooling.

(Cooling state: FIG. 5) From the state shown in FIGS. 10A and 10B, the shut-off valve support body 60 is automatically rotated in the reverse direction by the support shaft 42 (see the arrows in FIGS. 5A and 5B). Then, as shown in FIG. 5, the pressure equalizing hole 77 is “closed” and the communication hole 76 is “open”, so that the high pressure communication recess 74 communicates with the valve chamber 73. As a result, the refrigerant pressure in the valve chamber 73 becomes high, and the floating of the main valve 70 disappears when the switching of the refrigerant flow paths is completed. The main valve 70 is pressed against the valve seat 80, and the refrigerant is sucked from the discharge pressure conducting pipe 93 to the conducting pipe 94 via the high pressure communicating recess 74 and from the conducting pipe 95 via the low pressure communicating recess 75. The pressure conduit 92 smoothly flows while maintaining high airtightness.

[0035]

As described above, according to the invention described in claim 1, since the flow passage of the refrigerant is switched while the main valve is in the floating state, it can be performed very easily. Further, according to the invention described in claim 2, in addition to the above effect, since the main valve and the valve seat do not move and slide against each other in a state of being separated from each other, wear of the both members does not occur, and durability is improved. The property is improved.

Further, according to the invention described in claim 3, in addition to any one of the above effects, there is a torque amplification effect in the drive portion, so that the driving force of the closing valve support can be small, and the overall size of the device can be reduced.・ We have succeeded in achieving weight reduction. Further, according to the invention of claim 4, in addition to any of the above effects, since the first closing valve and the second closing valve are in the elastic state on the main valve side, the communication hole and the pressure equalizing hole are formed. The operation of contacting and separating is reliable, and the occurrence of refrigerant leakage is reduced.

[Brief description of drawings]

FIG. 1 is an external perspective view of a four-way switching valve according to an embodiment of the present invention.

2A is a longitudinal sectional view of FIG. 1, and FIG. 2B is FIG. 2A.
FIG.

FIG. 3 is a perspective view of a main body of the four-way switching valve.

FIG. 4 is a bottom view of the main valve of the same four-way switching valve.

FIG. 5 is an explanatory diagram (A) showing a cooling state of the four-way switching valve.
(B).

FIG. 6 is an explanatory view (A) and (B) showing a switching operation 1 from the cooling state to the heating.

FIG. 7 is an explanatory view (A) and (B) showing a switching operation 2 from the cooling state to heating.

FIG. 8 is an explanatory view (A) showing a heating state of the four-way switching valve,
(B).

FIG. 9 is an explanatory view (A) and (B) showing a switching operation 1 from the heating state to cooling.

FIG. 10 is an explanatory view (A) and (B) showing a switching operation 2 from the heating state to the cooling mode.

FIG. 11 is a cycle configuration diagram during cooling / heating operation.

[Explanation of symbols]

C ... Compressor SV ... Switching valve T ...
・ Electronic linear control valve E1 ・ ・ Heat exchanger (condenser) E2 ・ ・ Heat exchanger (evaporator) 10 ・ Motor section 20 ・ ・ Stator 21 ・ ・
Stator coil 22 ・ ・ Yoke 23 ・ ・ Cable 24 ・ ・
Connector 30, case 40, rotor 41, connecting ring frame
42 ... Support shaft 46 ... Push spring 47 ... Drive unit
48 ... Drive tooth portion 50. Main body portion 51. Main body case 60 .. Closure valve support body 60b .. Recessed hole 63 .. First closing valve 64 .. Second closing valve
65 ・ ・ Passive tooth portions 66, 67 ・ ・ Closed valve spring 70 ・ ・ Main valve 71 ・ ・ Support shaft hole
72 ... Central recess 73 ... Valve chamber 74 ... High pressure communication recess
75 ··· Low-pressure communication recess 76 · · Communication hole 77 · · Pressure equalizing hole
78 ··· Shaft pin 79 · · Interlocking protrusion 80 · · Valve seat
81 ... Joint part 82 ... Suction pressure conducting hole 83 ... Discharge pressure conducting hole 84 ... Conducting hole 85 (for outdoor heat exchanger) ... Conducting hole 86 (for indoor heat exchanger) ... Gap 90 ... Conduit group 92 ··· Suction pressure conducting pipe 93 ·· Discharge pressure conducting pipe 94 ··· Conducting pipe 95 (for outdoor heat exchanger) ··· Conducting pipe 100 (for indoor heat exchanger)
4-way switching valve

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuya Aoki             Setagaya-ku, Tokyo Todoroki 7-1724 shares             Ceremony company Fuji Kouki F-term (reference) 3H062 AA05 AA13 BB10 BB28 BB30                       BB33 CC02 EE07 FF41 HH04                       HH08                 3H063 AA05 BB02 BB22 BB32 BB37                       CC06 DA14 DB31 GG14                 3H067 AA13 AA33 BB03 BB12 CC02                       CC22 CC23 CC32 CC42 DD03                       DD32 DD45 EA02 EC08 FF11                       GG23

Claims (4)

[Claims] 1. A four-way switching valve comprising: a motor portion including a stator and a rotor; a case; and a main body portion including a main valve disposed in a valve chamber in the case; and a valve seat.
A suction pressure communicating hole and a discharge pressure communicating hole that communicate with the suction pressure side and the discharge pressure side of the compressor are provided, and two communicating holes that communicate with the indoor and outdoor heat exchangers, respectively, The main valve includes a low-pressure communication recess that selectively communicates with the suction pressure communication hole and the two communication holes, and a high-pressure communication recess that selectively communicates with the discharge pressure communication hole and the two communication holes. Further, a pressure equalizing hole that communicates the low pressure communication recess and the valve chamber, and a communication hole that communicates the high pressure communication recess and the valve chamber are provided, and the main valve is interlocked with the rotation of the rotor. A shutoff valve support is provided, and the shutoff valve support is provided with a first shutoff valve and a second shutoff valve. The first shutoff valve and the second shutoff valve form a pressure equalizing hole and a communication hole. It can be opened and closed selectively, and when the communication hole is closed and the pressure equalization hole is open, A four-way switching valve characterized in that the valve is moved to switch the flow path. 2. The four-way switching valve according to claim 1, wherein the main valve is separated from the upper surface of the valve seat during the movement. 3. As a rotation means of a shutoff valve support, a drive portion is formed from a drive tooth portion that rotates integrally with a rotor and a passive tooth portion provided on the shutoff valve support side, and the drive portion is capable of torque amplification. The four-way switching valve according to claim 1 or 2, wherein the four-way switching valve is formed. 4. The four-way switching valve according to claim 1, wherein the first shutoff valve and the second shutoff valve are supported by a shutoff valve support body in an elastic pressure state on the main valve side.