JP6976553B2 - Flow switching valve - Google Patents

Description

The present invention relates to a flow path switching valve that switches the flow path by a pilot drive unit (pilot valve), and relates to a flow path switching valve suitable for switching the flow path in, for example, a refrigeration cycle.

Conventionally, as a flow path switching valve used for a refrigeration cycle or the like, a flow path switching valve that switches the flow path of the flow path switching valve main body by a pilot drive unit (pilot valve) is known (for example, as a four-way switching valve). See Patent Document 1, Patent Document 2 as a hexagonal switching valve, etc.).

Normally, in this type of flow path switching valve, the pilot drive unit consists of an electromagnetic actuator having a coil and a pilot valve main body unit. A plurality of ports composed of pipe joints (for example, 4 ports for a 4-way switching valve and 6 ports for a 6-way switching valve) are connected to the flow path switching valve main body, and the pilot valve main body is connected to the pilot valve main body. Capillaries that conduct to the high-pressure side or low-pressure side ports, respectively, and capillaries that conduct to both ends (internal space) of the flow path switching valve main body are connected. The pilot valve main body operates the pilot valve body in the pilot valve main body by driving the electromagnetic actuator, and switches the refrigerant from the port on the high pressure side to the capillaries that conduct to both ends of the flow path switching valve main body and supplies them. .. As a result, the slide valve body in the flow path switching valve main body is operated by the differential pressure of the internal spaces at both ends of the flow path switching valve main body, and the flow path of the flow path switching valve main body is switched. ..

Further, for example, Patent Document 3 below proposes a fixed structure for the flow path switching valve main body of the pilot drive unit in the flow path switching valve described above.

Japanese Patent No. 2757997 Japanese Unexamined Patent Publication No. 8-170864 Japanese Patent No. 4639254

However, in the conventional fixing structure described in Patent Document 3, only the pilot valve main body portion of the pilot drive portion is fixed to the flow path switching valve main body portion via the mounting bracket. Therefore, when the coil body size increases as the valve performance improves, the relatively heavy coil part is supported only on the pilot valve body side (cantilever support), vibration, coil assembly state, etc. In some cases, the vibration resistance may be insufficient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a flow path switching valve capable of ensuring vibration resistance with a simple structure.

In order to achieve the above object, the flow path switching valve according to the present invention is basically a coil portion for operating the flow path switching valve main body and the main valve body in the flow path switching valve main body. A second unit for fixing the pilot valve main body to the flow path switching valve main body, comprising a pilot drive unit having a pilot valve main body having a pilot valve body that operates in response to energization of the coil portion. A fixing portion and a second fixing portion for fixing the coil portion to the flow path switching valve main body portion are provided , and the second fixing portion is arranged on the outer periphery of the flow path switching valve main body portion. with one end portion in the circumferential direction is locked to the stationary arranged housing around the coil portion, the other end portion of the circumferential direction, are characterized that they are being fixed to the housing.

In a preferred embodiment, the second fixing portion is composed of an elastically deformable band-shaped member.

In a more preferred embodiment, the second fixing portion is elastically crimped to the outer periphery of the flow path switching valve main body portion.

In a further preferred embodiment, the second fixing portion, the one end portion is engaged with the housing, said with the housing and the coil portion by a fastening member for the other end is fixed to the housing to said coil unit It is fastened together and fixed to the pilot valve body.

In a more preferred embodiment, one end of the second fixing portion is hooked and locked in a locking hole provided in the housing. In a more preferred embodiment, the other end of the second fixing portion is formed with an insertion hole formed of an elongated hole for passing a fastening member for fixing the housing to the coil portion, and the insertion hole is formed through the insertion hole. It is fixed to the housing by inserting the fastening member.

In a more preferred embodiment, the housing has a positioning protrusion for positioning the other end of the second fixing portion in the vicinity of the fastening position, and the other end of the second fixing portion has the positioning protrusion. A fitting hole for locking is formed.

In the flow path switching valve according to the present invention, the pilot valve main body of the pilot drive unit is fixed to the flow path switching valve main body by the first fixing portion, and the coil portion of the pilot drive unit is fixed to the flow path by the second fixing portion. Since it is fixed to the switching valve main body, vibration resistance can be ensured even when the coil physique becomes large.

Further, since the second fixing portion is composed of an elastically deformable band-shaped member, it can be easily attached and the coil portion can be firmly fixed to the flow path switching valve main body portion. In addition, the effect of improving the yield and eliminating the waste of materials can be obtained.

Further, the second fixing portion is arranged on the outer periphery of the flow path switching valve main body portion, and both ends thereof in the circumferential direction are locked or fixedly connected to a housing fixedly arranged around the coil. To. Specifically, one end thereof is locked to the housing, and the other end portion is fastened and fixed to the pilot valve main body together with the housing and the coil portion by the fastening member, so that the second end can be suppressed while suppressing an increase in the number of parts. It is possible to simplify the mountability or assembly of the fixed portion.

Further, since the housing has a positioning protrusion for positioning the other end of the second fixing portion in the vicinity of the fastening position, the mountability or assembling property of the second fixing portion can be improved.

The front view which shows one Embodiment of the flow path switching valve which concerns on this invention. The right side view which shows one Embodiment of the flow path switching valve which concerns on this invention. The top view which shows one Embodiment of the flow path switching valve which concerns on this invention. 1 is a view showing the coil portion and the housing shown in FIGS. 1 to 3, in which (A) is a front view, (B) is a right side view, and (C) is a top view. 1 is a view showing the fixing brackets shown in FIGS. 1 to 3, in which FIG. 1A is a front view, FIG. 3B is a right side view, and FIG. 3C is a top view. The figure provided for the detailed description of the assembly procedure of the fixing bracket shown in FIGS. 1 to 3.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 are a front view, a right side view, and a top view showing an embodiment of the flow path switching valve according to the present invention, respectively.

In addition, in this specification, the description indicating the position and direction such as up / down, left / right, front / back, etc. is added for convenience according to the drawing in order to avoid complicated explanation, and is actually incorporated in the refrigeration cycle or the like. It does not always point to the position or direction in the state.

Further, in each drawing, the gap formed between the members, the separation distance between the members, etc. are larger than the dimensions of each constituent member in order to facilitate understanding of the invention and for convenience in drawing. Or it may be drawn small.

The flow path switching valve (four-way switching valve) 1 of the illustrated embodiment is used, for example, for flow path switching in a refrigeration cycle, and is basically a cylindrical flow path switching valve main body 5 and a flow path switching. A pilot drive unit (four-way pilot valve) 10 for operating a slide valve body (main valve body) (not shown) arranged in the valve body 5 is provided.

The structure of the flow path switching valve main body 5 and the pilot drive unit 10 in the flow path switching valve 1 of the present embodiment is almost the same as that described in Patent Documents 1, 2, and the like. Needless to say, the structures of the flow path switching valve main body 5 and the pilot drive unit 10 in the flow path switching valve 1 are not limited to the illustrated examples.

In the illustrated embodiment, the flow path switching valve main body 5 is arranged along the left-right direction (horizontally), and a plurality of pipe joints (4 in the illustrated example) are arranged above and below the substantially center (in the left-right direction). Ports 6 to 9 are connected. For example, when the flow path switching valve 1 of the present embodiment is incorporated in a heat pump type heating / cooling system, the upper port 6 is connected to the compressor discharge side, and the lower center port 7 is connected to the compressor suction side. The lower left and right ports 8 and 9 are connected to an outdoor heat exchanger or an indoor heat exchanger.

On the other hand, the pilot drive unit 10 includes an electromagnetic actuator 17 having a coil unit 16 and a pilot valve main body portion 11, and is a pilot built in the pilot valve main body portion 11 in response to energization of the coil portion 16 of the electromagnetic actuator 17. The valve body (not shown) operates.

The pilot drive unit 10 is arranged horizontally on the front side of the flow path switching valve main body 5 (that is, the pilot valve main body 11 is located on the left side and the electromagnetic actuator 17 is located on the right side), and the pilot valve thereof is arranged. The main body 11 has capillaries 12 and 13 conducting to the ports 6 and 7 on the high pressure side or the low pressure side, respectively, and capillaries 14 and 15 conducting to both ends (internal space) of the flow path switching valve main body 5, respectively. It is connected.

The pilot valve main body 11 operates the pilot valve body in the pilot valve main body 11 by driving the electromagnetic actuator 17, and conducts the refrigerant from the port 6 on the high pressure side to both ends of the flow path switching valve main body 5, respectively. Switch to the capillaries 14 and 15 to supply. As a result, the slide valve body in the flow path switching valve main body 5 is operated by the differential pressure of the internal spaces at both ends of the flow path switching valve main body 5, and each port 6 to 9 of the flow path switching valve main body 5 is operated. The flow path between them is switched.

In the present embodiment, the pilot drive portion 10 is the flow path switching valve main body portion 5 (passage switching valve main body portion 5) via two fixing members of a frame-shaped fixture (first fixing portion) 20 and a fixing bracket (second fixing portion) 30. It is fixed to the front side of).

As can be clearly seen with reference to FIG. 3, the frame-shaped fixture (first fixing portion) 20 is composed of a pair of substantially U-shaped plate materials 21 and 22 (when viewed in the vertical direction), and the pair of plate materials thereof. 21 and 22 are arranged facing each other in the front-rear direction, and the left and right side plate portions of the plate members 21 and 22 are connected to each other by connecting members 23 and 24 (for example, bolts, screws, rivets, etc.). The front portion of the frame-shaped fixture 20 (the bottom plate portion of the plate material 21 arranged on the front side) is fixed to (the outer periphery of) the pilot valve main body portion 11 (outer circumference) of the pilot drive portion 10 by brazing, welding, or the like, and the frame is fixed. The rear part of the shape fixture 20 (the bottom plate part of the plate material 22 arranged on the rear side) is fixed to the flow path switching valve main body part 5 (outer circumference of the central part) by brazing, welding, etc., thereby driving the pilot. The pilot valve main body 11 in the section 10 is fixed to the flow path switching valve main body 5.

On the other hand, the fixing bracket (second fixing portion) 30 is basically composed of a single plate material (elastic member) in the shape of an elastically deformable substantially strip made of, for example, spring steel. In the present embodiment, the housing 18 that covers the outside (upper and lower sides and right side) of the coil portion 16 of the electromagnetic actuator 17 is fixedly arranged in the coil portion 16. The fixing bracket 30 is arranged on the outer periphery of the flow path switching valve main body 5, and both ends in the circumferential direction (around the center line of the flow path switching valve main body 5) are connected to the housing 18. The coil portion 16 of the electromagnetic actuator 17 in the pilot drive portion 10 is fixed to the flow path switching valve main body portion 5 (via the housing 18).

For details, as can be clearly seen with reference to FIGS. 1 to 3 and FIG. 4, the housing 18 arranged around the coil portion 16 is mainly a top plate portion 18a located above the coil portion 16. It has a lower plate portion 18b located below the coil portion 16 and a right plate portion 18c located on the right side of the coil portion 16 connecting the upper plate portion 18a (right end) and the lower plate portion 18b (right end). .. A through hole 18d (see FIG. 4B) for passing a bolt 19 as a fixing member is provided in the center of the right side plate portion 18c, and an upper portion of the right side plate portion 18c (that is, a through hole 18d) is provided. On the upper side of the above), a positioning protrusion 18e to be fitted into the fitting hole 35 provided in the fixing bracket 30 described later is provided. In the illustrated example, two fitting holes 35 and two positioning protrusions 18e are provided side by side in the front-rear direction.

Further, the fixing bracket described later is directed backward and downward from the right end of the rear side portion of the lower plate portion 18b in the housing 18 (in other words, toward diagonally downward in a direction close to the flow path switching valve main body portion 5). A locking portion 18g having a locking hole 18f composed of a long hole (a long hole in the left-right direction) having a size for passing the folded-back hooking portion 32 of 30 is provided.

On the other hand, the fixing bracket 30 has a tubular portion 31 arranged on the outer periphery of the flow path switching valve main body portion 5, as can be clearly seen with reference to FIGS. 1 to 3 and FIG.

The lower portion of the fixing bracket 30 (cylindrical portion 31) is formed to be slightly narrower, and the lower end portion thereof is folded back from the tubular portion 31 outward and in the opposite direction. A stop 32 is provided.

Further, the upper tip portion of the fixing bracket 30 (cylindrical portion 31) is formed to be slightly narrower, and the upper tip portion thereof faces outward from the tubular portion 31 (assembly shown in FIGS. 1 to 3). In the state, a substantially rectangular pressing plate portion 33 extending forward) is provided, and the pressing plate portion 33 is provided downward from the right end (front end) of the pressing plate portion 33 (that is, in the direction perpendicular to the pressing plate portion 33). A fixing plate portion 36 having an insertion hole 34 (see FIG. 5A) formed of a long hole (a hole long in the front-rear direction) for passing the bolt 19 is vertically installed. On the upper side of the insertion hole 34 of the fixing plate portion 36 (position close to the pressing plate portion 33), a long hole (front and back) into which the positioning protrusion 18e provided on the right side plate portion 18c of the housing 18 is fitted. A fitting hole 35 (arranged in the front-rear direction) is provided (a hole long in the front-rear direction).

Before fixing the coil portion 16 to the flow path switching valve main body 5, the pilot valve main body 11 in the pilot drive portion 10 is fixed to the flow path switching valve main body 5 in advance by using the frame-shaped fixture 20. , The coil portion 16 is mounted (interior) in the housing 18.

In the above state, the folded-back hooking portion 32 on the lower end side of the fixed bracket 30 is inserted into the locking hole 18f of the locking portion 18g of the housing 18, and the fixing bracket 30 (folded-back locking portion 32) is inserted into the housing 18. (Locking portion 18g) is hooked and locked to integrate the fixing bracket 30 and the housing 18. Next, the flow path switching valve main body 5 is inserted into the cylindrical portion 31 of the fixing bracket 30, and the coil portion 16 previously inserted into the housing 18 is attached to the pilot valve main body 11. The fixing bracket 30 is attached (exterior) to the outer periphery of the switching valve main body 5. At this time, the inner diameter of the tubular portion 31 of the fixing bracket 30 is formed so as to be slightly larger than the outer diameter of the flow path switching valve main body portion 5 (see FIG. 6A). In the illustrated example, at this time, the capillary 15 arranged along the outer periphery of the flow path switching valve main body portion 5 (left half portion) passes between the fixing bracket 30 and the housing 18 or the coil portion 16. Be distributed.

Next, the fixing bracket 30 is elastically deformed (that is, against the elastic force of the fixing bracket 30), and the pressing plate portion 33 on the upper end side of the fixing bracket 30 is changed to the upper plate portion 18a (of the housing 18). The fixing plate portion 36 of the fixing bracket 30 is pressed against the right side plate portion 18c (right surface) of the housing 18 while being pressed (contacted) against the upper surface), and is provided on the fixing plate portion 36 of the fixing bracket 30. A positioning protrusion 18e provided on the right side plate portion 18c of the housing 18 is fitted and hooked into the fitting hole 35. As a result, the fixing bracket 30 (fixing plate portion 36) can be easily positioned with respect to the housing 18, and the fixing bracket 30 (cylindrical portion 31) is elastically crimped to the outer periphery of the flow path switching valve main body portion 5. It is pressed (close contact) (see FIG. 6 (b)).

When the pressing plate portion 33 is pressed in the direction of the upper plate portion 18a when the fixing bracket 30 is elastically deformed, first, the entire inner circumference of the tubular portion 31 is covered with the flow path switching valve main body portion 5. The fixing bracket 30 is in contact with the outer periphery (at this time, the pressing plate portion 33 and the upper plate portion 18a are separated from each other), and when further pushed in, the pressing plate portion 33 is in contact with the upper plate portion 18a. Transforms. By setting the load of the fixing bracket 30 in this way, it can be securely fixed.

Then, the bolt 19 is inserted and screwed through the insertion hole 34 provided in the fixing plate portion 36 of the fixing bracket 30 and the through hole 18d provided in the right side plate portion 18c of the housing 18. The fixing bracket 30 (fixing plate portion 36) is fastened together with the housing 18 and the coil portion 16 to the pilot valve main body portion 11 (see FIG. 6 (c)).

In this example, the housing 18 that has been caulked and fixed to the coil portion 16 in advance is fastened together with the fixing bracket 30 to the pilot valve main body portion 11 with bolts 19.

As a result, the coil portion 16 is fixed to the flow path switching valve main body portion 5, and the pilot valve main body portion 11 in the pilot drive portion 10 and the coil portion 16 of the electromagnetic actuator 17 are separately fixed members (frame-shaped fixtures 20). , It will be fixed to the flow path switching valve main body 5 via the fixing bracket 30).

In the flow path switching valve 1 of the present embodiment having the above configuration, the pilot valve main body 11 of the pilot drive unit 10 is connected to the flow path switching valve main body 5 by the frame-shaped fixture (first fixing portion) 20. At the same time, the coil portion 16 of the pilot drive portion 10 is fixed to the flow path switching valve main body portion 5 by the fixing bracket (second fixing portion) 30, so that vibration resistance is resistant even when the coil physique becomes large. Sex can be ensured.

Further, since the fixing bracket 30 is made of an elastically deformable band-shaped member, it can be easily attached and the coil portion 16 can be firmly fixed to the flow path switching valve main body portion 5. In addition, the effect of improving the yield and eliminating the waste of materials can be obtained.

Further, the fixing bracket 30 is arranged on the outer periphery of the flow path switching valve main body portion 5, and both ends thereof in the circumferential direction are locked or fixed to the housing 18 fixedly arranged around the coil portion 16. Is connected. Specifically, the folded-back hooking portion 32 on one end side thereof is locked to the locking portion 18g provided on the housing 18, and the fixing plate portion 36 on the other end side is connected to the pilot valve main body together with the housing 18 and the coil portion 16 by the bolt 19. Since it is fastened together and fixed to the portion 11, it is possible to simplify the mountability or assembling property of the fixing bracket 30 while suppressing an increase in the number of parts.

Further, in the present embodiment, the housing 18 has a positioning protrusion 18e for positioning the other end of the fixing bracket 30 in the vicinity of the fastening position, and the fixing bracket 30 (fixing plate portion 36) is provided at the time of assembly. By hooking (locking) the positioning protrusion 18e provided on the housing 18 (right side plate portion 18c) into the fitting hole 35 provided in the bolt 19, the fixing bracket 30 is attached to the housing 18 before the bolt 19 is tightened. Since the pressing load can be removed, there is an advantage that the mountability or the assembling property of the fixing bracket 30 can be improved.

In the above embodiment, the slide type flow path switching valve main body having the slide valve body as the main valve body has been described as an example, but the present invention has been described by exemplifying the rotary type flow path switching valve main body having the rotary valve body. It is needless to say that the same applies to the part (see, for example, Japanese Patent No. 3344991).

Further, in the above embodiment, the case where the present invention is applied to the four-way switching valve has been described as an example, but it goes without saying that the present invention can be similarly applied to the six-way switching valve and the like.

Further, it goes without saying that the flow path switching valve according to the present invention described above can be incorporated not only into a refrigeration cycle and a heat pump type heating / cooling system but also into other systems, devices and devices.

1 Flow switching valve 5 Flow switching valve Main body 6 to 9 Port 10 Pilot drive part 11 Pilot valve main body 12 to 15 Capillary 16 Coil part 17 Electromagnetic actuator 18 Housing 18a Housing upper plate part 18b Housing lower plate part 18c Right side plate part of housing 18d Through hole 18e Positioning protrusion 18f Locking hole 18g Locking part 19 Bolt (fastening member)
20 Frame-shaped fixture (first fixing part)
21, 22 U-shaped plate 23, 24 Connecting member 30 Fixing bracket (second fixing part)
31 Cylindrical part 32 Folded hook part 33 Pushing plate part 34 Insertion hole 35 Fitting hole 36 Fixed plate part

Claims (7)

It has a flow path switching valve main body and a pilot valve main body having a coil portion for operating the main valve body in the flow path switching valve main body and a pilot valve body that operates in response to energization of the coil portion. A flow path switching valve including a pilot drive unit.
A first fixing portion for fixing the pilot valve main body portion to the flow path switching valve main body portion and a second fixing portion for fixing the coil portion to the flow path switching valve main body portion are provided .
The second fixing portion is arranged on the outer periphery of the flow path switching valve main body portion, and one end portion in the circumferential direction thereof is locked to a housing fixedly arranged around the coil portion, and the circumferential direction thereof is engaged. the other end, the flow path switching valve characterized that you have been fixed to the housing of the. The flow path switching valve according to claim 1, wherein the second fixing portion is made of an elastically deformable band-shaped member. The flow path switching valve according to claim 1 or 2 , wherein the second fixing portion is elastically crimped to the outer periphery of the flow path switching valve main body portion. Said second fixing portion, the one end portion is engaged with the housing, the pilot valve body portion together with the housing and the coil portion by a fastening member for the other end is fixed to the housing to said coil unit The flow path switching valve according to any one of claims 1 to 3, wherein the flow path switching valve is fastened together and fixed. The flow path switching valve according to any one of claims 1 to 4, wherein one end of the second fixing portion is hooked and locked by a locking hole provided in the housing. .. At the other end of the second fixing portion, an insertion hole formed of an elongated hole for passing a fastening member for fixing the housing to the coil portion is formed, and the fastening member is inserted through the insertion hole. The flow path switching valve according to any one of claims 1 to 5, wherein the flow path switching valve is fixed to the housing. The housing has a positioning protrusion for positioning the other end of the second fixing portion in the vicinity of the fastening position.
The flow path switching valve according to claim 4 , wherein a fitting hole for locking the positioning protrusion is formed at the other end of the second fixing portion.

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