JP3289092B2 - Air conditioner valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve to be mounted on an outdoor unit of a separation type air conditioner. It is intended to fulfill.

[0002]

2. Description of the Related Art Conventionally, an outdoor unit of a separation type air conditioner includes:
Two valves, a 3/8 "valve connected to the four-way switching valve and a 1/4" valve connected to the capillary tube, are mounted on the side, and can be connected to the indoor unit when the air conditioner is installed. It is designed to be plumbed. In addition, a structure in which two valves are integrated into one valve is disclosed in Japanese Utility Model Application Laid-Open No. 61-5 / 1986.
A valve disclosed in Japanese Patent No. 4563 and Japanese Utility Model Application Laid-Open No. 61-54564 has been proposed.

[0003]

In the case of using two conventional valves, independent valves must be prepared, which leads to an increase in cost, a large mounting space, and a need for a valve. As for the structure, the height dimension was large because a shaft valve was adopted inside. Furthermore, there is no indication of opening / closing on the valve itself, so that accurate installation is impossible only by an installation specialist.

The valves disclosed in Japanese Utility Model Laid-Open Nos. 61-54563 and 61-54564 each have a single cylinder-shaped valve body, but the internal valve is also an axial valve. In the former, a main valve rod having a second valve rod inside is attached to a valve body to perform the function of two valves, and the latter penetrates a long central valve rod in the center. The annular valve body provided in the shape is attached to the valve body, and the connection holes at the center and the lower end of the valve body are opened and closed by both valve rods. It is extremely troublesome.

Further, since the axial valve is double provided in the valve body, the height becomes large, and the connection hole of the pipe to the indoor unit is outward, so that the pipe is not easily accommodated.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a valve having a novel structure in which the above-mentioned problems inherent in conventional products are solved. Equipped with a rotatable disk shutter,
The circulation holes are switched by the rotation of the disk shutter, and the connection holes of the pipes are provided on the side surfaces of the flat case-shaped valve body to make the whole compact.

That is, the present invention provides a flat valve case 1 having a shallow circular recess 2 on its upper surface and two pipe connection holes 3 and 4 concentrically shifted by 90 ° or 120 in phase. 2, a disk shutter 10 having through holes 11 and 12 at positions corresponding to the pipe connection holes 3 and 4 and having a drive shaft 15 at the center thereof is rotatably provided. Pipe holes 1 at positions corresponding to
A valve cover 20, which has a shaft hole 21 in which the drive shaft 15 is rotatably fitted in the center portion and has a central portion 8 and 19, is covered from above the disk shutter 10 and the drive shaft 15 so as to maintain airtightness. A valve for an air conditioner, which is fixed to a valve case 1.

[0008]

In the present invention, by rotating the drive shaft 15 from outside the valve cover 20 to rotate the disk shutter 10 in the valve case 1, the pipe connection holes 3, 4 on the lower surface of the valve case 1 and the valve cover The state of communication with the pipe holes 18 and 19 of the pipe 20 can be selectively changed as appropriate. Therefore, when the air conditioner is installed or relocated, all operations can be performed only by changing the position of the disk shutter 10 via the drive shaft 15 when bleeding air or collecting refrigerant.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a shallow circular recess 2 on the upper surface.
A flat valve case having two pipe connection holes 3 and 4 shifted concentrically by 90 ° from each other, and ring grooves 5 and 5 are provided on the outer periphery of the upper surface of the pipe connection holes 3 and 4, The O-ring 6 fits here.

Reference numeral 7 denotes a slim hole provided in the center of the circular concave portion 2 so that a tip portion of a drive shaft 15 described later fits therein. Reference numeral 8 denotes a mounting hole, and reference numeral 9 denotes a seal packing.

Reference numeral 10 denotes a disk shutter rotatably fitted in the circular concave portion 2, and a pipe connection hole 3 in the valve case.
4 has passage holes 11 and 12 of the same diameter at positions corresponding to 4 and a non-circular drive hole 13 at the center. The non-circular shape is not particularly limited, but may be a cutout circular shape having a straight portion 14 as shown in the figure.

Reference numeral 15 denotes a drive shaft for rotating the disk shutter 10. A slot 16 is provided at the lower end so as to penetrate the drive hole 13, and a ring groove 17 into which an O-ring fits is provided at an intermediate portion. The upper half has a small diameter and has an oval shape with a slit on both sides of the upper end.

Numeral 20 denotes a valve cover which can be fitted in an airtight manner to the flat valve case 1 via the seal packing 9 on the lower surface, and a pipe is provided at a position corresponding to the pipe connection holes 3 and 4 of the valve case. Holes 18 and 19 are provided and this pipe hole is extended in an L-shape to the outer peripheral side surface of the valve cover. A shaft hole 21 in which the drive shaft 15 is rotatably fitted is provided in the center. In addition, 41 is a mounting hole.

The shaft hole 21 of the valve cover is formed as shown in FIG.
The lower surface has a diameter at which the central portion of the drive shaft 15 fits, and a small-diameter portion 22 is formed above the lower portion, and a stepped hole including a small-diameter hole 23 and a large-diameter hole 24 is formed above the small-diameter portion. The internal thread 25 is provided on the inner peripheral surface of the large-diameter hole 24. The upper edge of the small diameter hole of the stepped hole is chamfered to form the valve seat 26.

A ring groove 5 is also provided around the pipe hole 19 on the inner surface side of the valve cover.
Is to be fitted. Reference numeral 30 denotes an operation shaft, which is provided with a fitting recess 27 at the lower end in which an oval portion of the head of the drive shaft 15 fits, and a flange-like flange 28 provided on a lower outer peripheral portion.
The lower surface of the flange 28 is formed on a slope 29 so as to correspond to the valve seat of the stepped hole.

Reference numeral 33 denotes a lock bolt having a hole 31 through which the operating shaft 30 is inserted at the center, a male screw 32 fitted to the female screw 25 on the lower outer periphery, and a hexagonal head 34 formed on the upper outer periphery. Reference numeral 35 denotes a handle with an arrow 36 on the upper surface. The handle 35 is fitted on the upper end of the operation shaft 30 and fixed with a knock pin 37.

Numeral 38 is a valve cover, which is provided on each side of the outer periphery of the upper surface as shown in FIG.
Display 39 indicating the open / closed state of the valve at the rotation position of 0
It is provided with.

Reference numeral 40 denotes a mounting bolt, which is provided with the O-ring 6, the disk shutter 10, the drive shaft 15 in which the O-ring is fitted, etc., in the valve case 1, and covers the valve cover 20 via the seal packing 9. The bolt 40 is inserted through the bolt 40 into the mounting hole 41 of the valve cover and the mounting hole 8 of the valve case, as shown in FIGS. 2 and 3, and attached to the outdoor unit.

Reference numeral 42 denotes a connection pipe connected to the pipe hole 18 of the valve cover. The connection pipe has a service port 43 provided with a valve core at an intermediate portion, and has a flare surface 44 at the tip. The connection pipe connected to the connection pipe 19 also has a flare surface 44 at the tip.
A flare nut 46 is usually screwed into the ends of the two connection pipes as shown in FIG.

Although the valve case 1 and the valve cover 20 of the present invention have been described as being formed by casting, both can be formed by pressing. In this case, an L-shaped pipe may be welded to position the openings of the pipe holes 18 and 19 on the side of the valve cover.

In the above-described embodiment, the valve case 1
Although the form in which the circular concave portion 2 is formed on the upper surface of the valve case has been described, the circular concave portion may be provided on the valve cover 20 side, and the upper surface of the valve case may be flat. Further, the disk shutter 10 also has the drive hole 13 at the center, but the drive shaft 1 is provided at the center of the disk shutter 10.
5 may be provided integrally.

[0022]

[Valve operation procedure] Connect the 3/8 "pipe connection hole 3 on the valve case side of the valve with the above structure to the four-way switching valve side (hereinafter referred to as gas side) of the outdoor unit, and connect the other 1/4" pipe. Connect the connection hole 4 to the capillary tube side of the outdoor unit (hereinafter referred to as the liquid side)
The function of the valve in a state where it is connected to will be described with reference to FIG. FIG. 6 shows only the relationship between the pipe connection holes 3 and 4 of the valve case and the passage holes 11 and 12 of the disk shutter 10. In the valve cover, positions corresponding to the both pipe connection holes 3 and 4 are shown. Are arranged on the valve cover, respectively, and when one or both of the pipe connection holes 3 and 4 of the valve case and the passage holes 11 and 12 of the disk shutter coincide with each other, the pipe holes on the valve cover side respectively. 18, 1
9 or both.

FIG. 6A shows the state of the valve at the time of shipment / transfer.
2 does not match any of the connection holes in the valve case,
Both liquid sides are in a closed state. In this state, pipes leading to the evaporator on the indoor unit side are formed in the pipe holes 18 and 19 of the valve cover.

FIG. 6B shows the state of the air purge, in which the drive shaft is rotated and the passage hole 11 of the disk shutter is opened.
Is matched with the pipe connection hole 4 on the liquid side. In this state, the air accumulated in the pipe on the indoor unit side is pushed by the refrigerant in the outdoor unit, and is released to the atmosphere by pushing the valve core in the service port 43. As a result, the indoor unit is also filled with the refrigerant.

FIG. 6C shows a state during operation of the air conditioner, and the passage holes 11 and 12 of the disk shutter.
Are matched with the pipe connection holes 3 and 4, respectively.
In this state, since the refrigerant circulates between the outdoor unit and the indoor unit, cooling or heating operation is possible.

FIG. 6D shows a state in which the pump is down, in which the passage hole 12 of the disk shutter is aligned with the gas-side pipe connection hole 3 and the liquid-side pipe connection hole 4 is closed. is there. In this state, when operating, the refrigerant on the indoor unit side is drawn by the compressor and returned to the outdoor unit side.
After that, when the disk shutter is turned to the state shown in FIG. 6A, each pipe connection hole is fully closed, so that removal and transfer can be performed freely.

The position of the disk shutter,
The open / closed state of the liquid side and the gas side at that time can be visually recognized by the indication on the upper surface of the valve cover and the arrow 36 of the handle 35 shown in FIG. In FIG. 4, “G” indicates the above gas side, and “L” indicates the above liquid side. When operating each of the handles, the hexagonal head 34 of the lock nut 33 shown in FIG.
Turn the lock bolt 3 when shipping, relocating or operating.
By tightening 3, the slope 29 on the lower surface of the flange of the operation shaft 30 is pressed against the valve seat portion of the stepped hole in the center of the valve cover 20 to obtain a seal by metal touch. Instead of the metal touch seal, the lower surface of the flange 28 and the upper surface of the small-diameter hole 23 in the stepped hole may have a sealing function via, for example, copper packing.

In the above embodiment, when the drive shaft 15 is driven, a stepped hole is formed in the upper center of the valve cover 20.
Here, the form in which the disk shutter 10 is rotated using the flanged operation shaft 30, the lock bolt 33, the handle 35, and the like has been described. However, the O-ring 6 provided on the drive shaft 15 is provided with respect to the shaft hole 21 at the center of the valve cover. The operation shaft or the like as described above is not necessarily required if the refrigerant does not leak sufficiently and the drive shaft 15 can be rotated. For example, a simple T-shaped handle or a hexagonal L-shaped handle May be.

Further, the valve cover 38 having a display 39 indicating the open / closed state of the valve on the outer peripheral portion of the upper surface is not always necessary.
Alternatively, the valve cover 38 may be provided directly on the upper surface of the valve 0.

Further, in the above embodiment, the pipe connection holes 3 and 4 are shifted in phase by 90 °. However, this is to obtain four states: air conditioner operation, shipping and relocation, pump down and air purge. When the air purge is not required, the phase may be shifted by 120 °.

[0031]

As described above, the valve according to the present invention is such that a disk shutter is rotatably provided in one flat valve case, and the valve is opened and closed by rotating the disk shutter. Because of this, the height of the valve itself is short and the whole becomes compact,
The condition attached to the side surface of the outdoor unit is also good in appearance. In addition, when opening and closing each valve, all the opening and closing operations can be performed simply by loosening the lock bolt and turning the handle, so it is easy to handle and easy to operate. Since the open / closed state displayed on the outer peripheral surface of the cover can be easily confirmed, there is a great merit that operation errors are eliminated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an example of the present invention.

FIG. 2 is a perspective view of an example of the present invention.

FIG. 3 is a longitudinal sectional side view of an example of the present invention.

FIG. 4 is a plan view when the valve cover of the present invention is attached.

FIG. 5 is a front view of FIG. 4 showing only the valve cover in section;

FIG. 6 is a plan view showing a relationship between a position of a disk shutter and a pipe connection hole of a valve case.

[Explanation of symbols]

1 Valve case 2 Circular recess
3, 4 Piping connection hole 10 Disc shutter 11, 12 Passage hole 1
3 Drive hole 15 Drive shaft 18, 19 Piping hole 2
0 Valve cover 21 Shaft hole 24 Large diameter hole 2
5 Female thread 27 Fitting recess 28 Flange 3
0 operation shaft 31 hole 32 male screw 3
3 Bolt 34 Hex head 35 Handle 3
6 Arrow 38 Valve cover 39 Indication

Claims (3)

(57) [Claims] 1. A concentric circle having a shallow circular concave portion 2 on an upper surface.
90 ° or 120 ° out of phase with two pipe connections
Inside the circular recess 2 of the flat valve case 1 having the holes 3 and 4
At the position corresponding to the pipe connection holes 3 and 4,
Discs having a drive shaft 15 at the center with
The shutter 10 is rotatably provided, and the two pipe connection holes are provided.
Piping holes 18 and 19 are provided at positions corresponding to 3 and 4, respectively.
A shaft hole 21 into which the drive shaft 15 is rotatably fitted is formed at the center.
The valve cover 20 provided with the disk shutter 10
The valve is placed over the drive shaft 15 so as to maintain airtightness.
An air conditioner valve fixed to the case 1,
The upper half of the shaft hole 21 in the central part of the valve cover is
And a small-diameter hole 23 at the bottom, a female screw 25 provided on the inner peripheral surface of the large-diameter hole 24 at the upper end, and a fitting recess 27 fitted at the head of the drive shaft 15 at the lower end. The fitting recess 27 of the operation shaft 30 having a flange-like flange 28 provided on the lower outer periphery is fitted into the head of the drive shaft 15, and has a hole 31 through which the operation shaft 30 passes at the center. Lock bolt 3 having a hexagonal head 34 at its upper periphery
3 is passed through the operation shaft 30 and the female screw 25 above the stepped hole is inserted.
With screwing in, the handle 35 to the head of the operating shaft 30
A valve for an air conditioner, comprising: 2. The operation system according to claim 1, wherein
A valve for an air conditioner having a sealing function between the lower surface of the base and the upper end edge of the small-diameter hole 23 in the stepped hole. 3. An apparatus according to claim 1 or claim 2, arrows 36 on top of the handle 35 are attached, it covers the top of the valve cover 20 in valve cover 38, the respective outer peripheral part of the upper surface of the valve cover plate An air conditioner valve provided with a display (39) indicating the open / closed state of the valve at the rotation position of the shutter (10).