JPS6015027Y2 - Shutoff valve for room cooler - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a closing valve disposed in the middle of a refrigerant pipe of a separate room cooler.

Conventionally, as shown in Fig. 71, for example, as shown in Fig. 71, this type of shutoff valve for a room cooler has an operation port a1 at the upper end, and an in-machine piping port a, 2 for connecting the in-machine piping at the lower end, respectively. At the same time, an outside piping port a3 for connecting an outside piping (not shown) is provided on the side, and a gas charge etc. is provided on the side between the outside piping port a3 and the operation port a1. A charcoal shield A4 for performing the above operation is fitted into the valve body a and the valve body a, and is sealed with a seal member C while being screwed and supported by the wall surrounding the operation port 31, and is fitted into the valve body a, and is sealed with a sealing member C. Mouth a2 and Charshiro a
4, and by screwing the valve body d up and down, when the valve body d reaches the lowering end, only the inside pipe port a2 is closed, and the above-mentioned charcoal shield a and the outside pipe port are closed. a3, and when the valve body d is in the middle of being raised or lowered, both the in-machine piping port a2 and the charcoal seal a4 are opened to open the opening a2. a3. A4 are made to communicate with each other, and furthermore, when the valve body d is at the rising end, the charcoal a4 is made to communicate with each other.

A so-called angle-type closing valve (Special Publication Publication No. 1983
21934 (see Figure 3) is widely and generally adopted.

Note that e is a stopper that prevents the seal member C from coming out, and f is a cap that hermetically seals the operation port a with a gasket g.

However, in such an angled type, since the valve body d is arranged perpendicular to the piping direction (horizontal direction), a large installation space is required.Therefore, it is necessary to reduce this installation space. When the dimension of the valve body d in the height direction is reduced, there is a problem in that pressure loss increases.

In addition, since the valve body d is twisted and closed when the valve is closed, only metal materials can be used for valve parts such as the valve body d and the valve seat, and large torque is required to open and close the valve. is normally enclosed by the cap f and fixedly held by the stopper e, which poses a problem in that prior operations such as removing the cap f and loosening the stopper e are required during opening and closing operations, which is time-consuming.

The present invention has been made in view of this point, and the valve body and the operation part for opening and closing the valve body are arranged linearly along the piping direction, and the operation part is simply operated. To provide a linear shut-off valve for a room cooler in which the valve body can be opened and closed, thereby improving installation space and operability of the shut-off valve, and further reducing pressure loss. .

That is, in the present invention, an in-machine piping port is provided at one end, an external piping port is provided at the other end, and a charcoal is provided on the side, and a connection between the charcoal and the in-machine piping port is provided. A cylindrical valve body with a protruding ring part having a mountain-shaped cross section forming a pair of inboard and charge side valve seats on the inner periphery, and an inboard piping port that approaches and separates from the inboard valve seat of the protruding ring part. A valve body that opens and closes, a spring that biases the valve body in the valve closing direction, and a spring that is slidably and airtightly fitted into the valve body from the outside piping port, and has a charge of the protruding ring portion at the tip. A cylindrical guardian foot, which has a valve portion that opens and closes the front cover by moving into and out of contact with a side valve seat, and which presses the valve body in the valve opening direction when the valve body moves forward; A union nut is integrally and movably coupled to the guard gate and moves the guard guard relative to the valve body, and when the union nut is at the retracted end, the charcoal is opened and the inside piping port and the outside piping port are connected to each other. When the union nut moves forward, the inside piping port and the outside piping port are communicated with each other while the charcoal is open, and the charcoal is closed when the union nut is at the forward end.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 6 shows a separate room cooler, where A is an outdoor unit and B is an indoor unit, and the outdoor unit A has a compressor A,
A condenser A2 and a closing valve A3 according to the present invention are arranged,
Further, the indoor unit B is provided with an evaporator a.

The closing valve N will be explained based on FIGS. 2 and 4. In FIGS. 2 and 4, 1 is a cylindrical valve body, and one end portion of the valve body 1 ( An inboard piping port 2 is provided at the left end (left end) for connecting the inboard piping, and an outboard piping port 3 is provided at the other end (right end in the figure) for connecting the outboard piping. At the same time, a charcoal shield 4 is provided on the side (upper part in the figure) for charging gas, etc.

Further, a protruding ring portion 5 having a mountain-shaped cross section is formed on the inner periphery of the valve body 1 between the charcoal shield 4 and the in-machine pipe port 2,
The protruding ring portion 5 constitutes a pair of valve seats, an in-machine valve seat 5a on the in-machine piping port 2 side (left side in the figure) and a charge side valve seat 5b on the side of the charcoal shield 4 (right side in the figure). .

A valve body 6 is disposed inside the in-board piping port 2 of the valve body 1, and the outer peripheral surface of the head of the valve body 6 is covered with an elastic member 7 such as rubber. By bringing the projecting ring portion 5 of the valve body 1 into contact with and separating from the in-board valve seat 5a,
It is configured to open and close the in-machine piping port 2.

Further, a spring receiving portion 8 is provided protrudingly on one end side (on the left side in the figure) of the protruding ring portion 5 on the inner periphery of the valve body 1, and a coil spring 9 is provided between the spring receiving portion 8 and the valve body 6. is compressed, and the spring 9 always moves the valve body 6 in the valve-closing direction (
(rightward in the figure).

On the other hand, a cylindrical guard holder 10 is fitted inside the valve body 1 so as to be slidable in an airtight manner from the outside piping port 3. It constitutes a valve part 10a that approaches and separates from the charging side valve seat 5b of the protruding ring part 5 to open and close the charcoal shield 4, and a cylindrical support member 11 having a communication port 11a is connected to the inner periphery of the tip. ,
It contacts the valve body 6 via the support member 11, and when the guardian 10 moves forward (moves to the left in the figure), the valve body 6 is opened against the biasing force of the spring 9. It is configured to press in the direction.

Further, a union nut 12 is screwably fitted to the outer periphery of the other end of the valve body 1 (the outer periphery of the outside piping port 3 portion), and one end of the union nut 12 is rotatable to the guardian 10. It is non-slidably fitted on the outside and movably connected integrally with the guard holder 10, and by rotating the union nut 12, the guard holder 10 is moved relative to the valve body 1 in the left and right direction as shown in the figure. It is made to be moved.

When the union nut 12 is at the rearward end, the guard 10 is moved to the rearward end position as shown in FIG. At the same time, when the union nut 12 moves forward, the valve body 6 is closed by the biasing force of the spring 9 to cut off the communication between the inside piping port 2 and the outside piping port 3. 4 remains open, the valve body 6 is operated to open the inside piping port 2 and the outside piping port 3.
Further, when the union nut 12 is at the forward end, the guard holder 10 is moved to the forward end position as shown in FIG. has been done.

Incidentally, reference numeral 13 denotes a sealing member made of an O-ring which is externally fitted and supported on the part of the guard holder 10 that is inserted into the valve body 1, and is used to create an airtight seal between the valve body 1 and the guard holder 10.

Further, reference numeral 14 denotes a ring-shaped valve body retaining ring that is fitted and supported in a ring groove 10b formed on the outer periphery of the guardian 10 at the distal end side of the seal member 13, and the valve body retaining ring 14 is always The ring groove 10b is recessed into the ring groove 10b of the guard holder 10 as shown in enlarged detail in FIG. 1. When it matches the ring groove 1a formed on the inner periphery, the diameter expands slightly and the outer half engages with the ring groove 1a, thereby regulating the retreating end position of the guardian holder 10. .

Next, to explain the operation of the closure valve A3, when the closure valve A3 is in the closed state, the union nut 12 is at the rearward end position as shown in FIG. The integrally connected guard holder 10 is also at the retracted end position (the position where it is most removed from the valve body 1).

Therefore, the valve portion 10a at the tip of the guardian 10 is separated from the charging side valve seat 5b of the protruding ring portion 5 of the valve body 1, and the charging shield 4
is open, and the valve body 6 comes into contact with the machine inner valve seat 5a of the protruding ring part 5 due to the biasing force of the spring 9, and the machine inner pipe port 2 is closed. 3 are in communication.

At that time, since an elastic member 7 is attached to a portion of the valve body 6 that comes into contact with the in-board valve seat 5a, the elastic member 7
Due to the compressive deformation, the valve body 6 and the valve seat 5a can be brought into airtight contact with each other, and the in-machine piping port 2 can be reliably closed to prevent gas leakage.

Furthermore, as shown in FIG. 3, the retracting end position of the guard 10 with respect to the valve body 1 is regulated by the locking action of the valve retaining ring 14, so even if the union nut 12 is rotated in the retracting direction, The guard holder 10 does not retreat any further, thereby preventing the guard holder 10 from being unintentionally removed from the valve body 1.

In order to shift the closed valve from the closed state to the open state, when the union nut 12 is rotated in the forward direction, the union nut 12 and the valve body 1 are screwed together. The integrated guardian 10 moves forward in the left direction in the figure so as to sink into the valve body 1, and as the guardian 10 moves forward, the valve body 6, which abuts the guardian 10 via the support member 11, is moved by the spring 9. The projecting ring portion 5 is pushed away from the inboard valve seat 5a, thereby opening the inboard piping port 2 and communicating with both the charcoal shield 4 and the outboard piping port 3.

The valve retaining ring 14 is pushed into the ring groove iob of the guard holder 10 as the guard holder 10 moves forward.

When the guardian 10 reaches the forward end position, the fourth
As shown in the figure and FIG.
0a comes into contact with the charge side valve seat 5b of the protruding ring portion 5 of the valve body 1 in a so-called metal seat state and closes, thereby blocking the charcoal shield 4 and connecting only the inside piping port 2 and the outside piping port 3. The valve A3 is in communication with the valve A3, and the closing valve A3 is opened.

Therefore, in the embodiment, the closing valve is the valve body 6.
Because it is a so-called linear type coupling that opens and closes along the piping direction (horizontal direction in Figures 2 and 4), the installation space is small and there are no restrictions on the installation position, so it can be installed in the piping like a normal coupling. It can be installed anywhere along the way, and heat insulation work can be easily performed.

In addition, since it is linear in this way, it is possible to take a large opening and closing stroke of the valve body 6, thereby reducing pressure loss, and at the same time, it is possible to maintain an airtight sliding contact portion between the valve body 1 and the guard holder 10. It can be relatively long and can reliably prevent gas leakage during operation.

Since the closing valve opens and closes simply by turning the union nut 12, there is no need to attach or remove the valve cap as in the past, making opening and closing operations extremely easy. There is no hassle of doing so.

Moreover, since the valve body 6 opens and closes by moving linearly without rotating, it is possible to use an elastic member 7 such as rubber as described above for the valve portion, that is, the contact portion between the valve body 6 and the valve seat 5a. Therefore, opening and closing operations can be performed with light operating force.

Furthermore, since the charcoal shield 4 is opened and closed without using a conventional valve core, its diameter can be increased, and air purge, gas charging, etc. can be performed in a short time, and construction time can be shortened.

As explained above, according to the present invention, the valve body of the shutoff valve for a room cooler and the operation part for opening and closing the valve body are arranged linearly along the piping direction, so that they are of a so-called linear type. This has excellent practical effects in that it is possible to improve the installation space and operability of the shutoff valve, and to reduce pressure loss.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a conventional example, FIGS. 2 to 6 show an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the valve in a closed state, and FIG.
The figure is an enlarged view of the part surrounded by the chain line circle in Figure 2, Figure 4 is a vertical cross-sectional view of the valve in the open state, Figure 5 is an enlarged view of the part surrounded by the chain line circle in Figure 4, and Figure 6 is an enlarged view of the part surrounded by the chain line circle in Figure 4. The figure is a schematic diagram of a separate room cooler. A3... Closing valve, 1... Valve body, 2.
...Piping port inside the machine, 3...Piping port outside the machine, 4 Chassis, 5 protrusion, 5a... Valve seat inside the machine, 5b... ...Charge side valve seat, 6...
... Valve body, 9... Spring, 10...
... Guardian deity, lea... Benbe, 12...
・Union nut.

Claims (1)

[Scope of utility model registration request] An inboard piping port 2 is provided at one end, an outboard piping port 3 is provided at the other end, and a charcoal shield 4 is provided at the side.
is opened, and a cylindrical protruding ring portion 5 with a mountain-shaped cross section forming a pair of inboard and charge side valve seats 5a, 5b is formed on the inner periphery between the charcoal shield 4 and the inboard side piping port 2. a valve body 1, a valve element 6 that contacts the in-board valve seat 5a of the protruding ring portion 5 to open and close the in-board piping port 2, a spring 9 that biases the valve element 6 in the valve-closing direction; The valve body 1 is slidably and airtightly fitted from the outside piping port 3 into the valve body 1, and has a valve part 10a at its tip that opens and closes the charging side valve 4 by approaching and separating from the charging side valve seat 5b of the protruding ring part 5. , a cylindrical guard holder 10 that presses the valve body 6 in the valve opening direction when moving forward; and a cylindrical guardian holder 10 that is threadably fitted onto the outer periphery of the valve body 1 and movably coupled to the keeper holder 10 integrally. and a union nut 12 that moves the guard valve 10 relative to the valve body 1, and when the union nut 12 is at the rearward end, opens the charcoal shield 4 and establishes communication between the inside piping port 2 and the outside piping port 3. While blocking
When the union nut 12 moves forward, the machine inside piping port 12 and the machine outside piping port 3 are communicated with each other while the charcoal shield 4 remains open.
A closing valve for a room cooler, characterized in that a charcoal shield 4 is closed at the forward end.