JPS58109780A - Change-over valve - Google Patents

Abstract

PURPOSE:To obtain a valve simple in consturction, by a method wherein a valve is composed of a spherical dish-shaped bimetallic plate the shape of which is reversed upon detecting the temperature of a fluid, thereby opening or closing a passage. CONSTITUTION:Valve seats 5, 6 are placed at the central parts of an inflow port 2 and outflow ports 3, 4 so as to support the valve 7. the valve seats 5, 6 are provided at their central parts with projections for holding the valve 7, and are provided with holes 10 penetrating therethrough. The valve 7 is composed of a bimetallic plate the shape of which is reversed, as indicated by a solid line and a broken line, at specified temperatures, whereby the fluid flowing into the inflow port 2 can be passed into either of the outflow ports 3, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in switching valves. It is possible to provide a valve that has the function of detecting the temperature of a fluid and switching the flow of the fluid by combining a conventional valve and a sensor.

For example, as shown in FIG.

(1) is a sensor that detects the temperature of the fluid (5) in the pipe (4), changes the state of the built-in contact piece, and opens and closes the contact. As a result, 1. For example, if the temperature of the fluid exceeds a certain temperature, the contact piece will be in the +21 state, shorting the contacts (6) and (7), energizing the coil (not shown) of the solenoid valve (9), and The valve is opened and fluid flows out from the pipe OI.

At this time, the contacts (6) and (8) are not electrically connected, the coil (not shown) of the solenoid valve aυ is not excited, the solenoid valve remains closed, and no fluid flows into the pipe O3. +1m is the power supply.

It is opened and the fluid does not flow into the pipe OI but into the pipe aS.

As mentioned above, even if there is a conventional dialect.

Although it is not impossible to obtain the desired functions, the combination of these various functional items (a) requires a large amount of space, and (b) is expensive in terms of cost. There was a drawback.

Therefore, as a result of research, 1 the present invention has been developed to overcome the drawbacks of 1 and 2, and to use a spherical dish-shaped bimetal plate as a valve, it senses the temperature of the fluid, performs 2 reversal operations, and opens and closes 1 passage. The company aims to provide valves, and its applied products range from all kinds of products that control fluids, such as cooling and heating products, such as air-conditioning/heating machines with dehumidifying circuits.

Therefore, the structure of the switching piece according to the present invention will be described with reference to FIGS. 2 to 6.

Reference numeral 1 designates a main switching valve, which has an inlet 2 and an outlet 3, 4 for fluid, and a valve seat 5.6 holds a valve 7 at the center of the inlet and outlet, and is installed facing the valve. There is.

The valve seats 5 and 6 are provided with a protrusion 9 in the center to hold the valve 7, and a hole 10 is optionally bored through the valve seat.
In addition, a semicircular notch 11 is provided in a part of the circumference, thereby forming an opening 12 for the inlet 2.

(Figure 3.

Figure 2) The valve seat is fixed in this state. (still.

In FIG. 2, the valve 7 is fixed with force.) The valve 7 is formed of a bimetal whose shape is reversed depending on a certain temperature, as shown by the solid and broken lines in FIG.

(See Figure 6) The functions and effects of this device having the above structure will be described below.

In this way, fluid flows in from the inlet.

Above a certain set temperature (valve reversal operating temperature),
The valve is in the state 27 shown by the solid line (FIG. 2), and acts to cut off the electrical connection between the opening 12 and the hole 10L, and the opening 1
2 and the hole 10R, the fluid flows from the inlet 2 to the opening 12. It is led to the outlet 4 via the hole 101'j.

Contrary to the above, for fluids below the set temperature.

The valve is inverted to position 8, indicated by the dashed line (FIG. 2).

This action directs the fluid to the outlet 3.

As a result, this device can realize the same function as shown in Figure 1 in a more compact form, and does not use electrical energy to open or close the valve, but directly and instantly responds to the temperature of the fluid. Since it can be opened and closed, the number of parts can be reduced to a small number of bolts, and in addition, it has many practical advantages such as being able to obtain a highly reliable and inexpensive product.

Another embodiment of the nine devices described above will be described with reference to FIG.

7 is a bimetal valve, 3 is an outlet, and 13 is a spring, which acts to press the spool 14 to the left side.

Since this device has such a structure, the spool 14 is moved left and right by deformation of the dish-shaped bimetal 7 to open and close the fluid port.

Even in such an embodiment, similar functions and effects can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional device, Fig. 2 is a sectional view of the present device,
FIG. 3 is an enlarged view of the dashed-dotted line in FIG. FIG. 4 is a view taken from the ■-■ arrow in FIG. 3, FIG. 5 is a view taken from the 1-1 arrow in FIG.
FIG. 7 is an explanatory diagram of another embodiment of the present device. Main switching valve 2: Inlet 3.4 = Outlet 5, 6: Valve seat 7.8: Bimetal valve 9: Projection 10: Hole 12: Opening Sub-agent Takuji Kawakami

Claims (1)

[Claims] A switching valve characterized in that a fluid conducting portion is opened and closed by a spherical dish-shaped bimetal that deforms due to temperature changes in a circulating fluid.