JPH0226377A - Valve - Google Patents

Abstract

PURPOSE:To reduce impact noise and decrease the number of parts by providing a slide part having a mechanism by which fluid output ports can be selectively closed or opened, and actuating a slow operating element having an operating shaft contacted with this slide part by an exothermic means. CONSTITUTION:The valve has a fluid inlet port 10 and a plurality of fluid outlet ports 11, 12, 13, and the end parts of the above-stated fluid outlet ports 11, 12, 13 are selectively opened or closed with a slidably movable slide part 3. And a slow operating element 1 is contacted with this slide part 3, and an exothermic means 2 is provided for actuating the slow operating element 1. Moreover, a wax type thermo element or a form memory alloy or the like is used as the slow operating element 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improvement in a switching valve device suitable for maintaining a cooling or heating state, such as switching between air conditioning and heating, and furthermore, This invention relates to a switching valve device that reduces impact noise during operation.

[Conventional technology]

In the past, for example, as shown in FIG. 2, a valve device usually uses an electromagnet as a driving source, and such an electromagnetic switching device is generally driven by an electromagnetic coil 43 that generates a magnetic field and the magnetic field. It consists of a movable body, that is, a plunger 33, and a spring 34 for returning the plunger 33 to its original position when the magnetic field disappears.

Now, an example of the operation when the electromagnetic switching valve device having such a structure is used as a pilot valve of a four-way switching valve will be explained with reference to FIG.

That is, FIG. 2 shows a structure in which the above-mentioned electromagnetic switching valve device and four-way switching valve device are integrated, and in the initial state, the plunger 33 is on the left side in the pilot valve section, and the valve section 31 Although the port 25 is closed, the port 23 and the low pressure side port 24 are electrically connected. Therefore,
In the four-way switching valve 51, the pressure in the valve chamber 52 on the right side becomes high, and the valve body 54 moves to the left end together with the partition walls 55 and 56, thereby establishing electrical continuity between the pipe 58 and the vibrator 59.

Note that high-pressure fluid flows into the four-way switching valve from the vibro 1, and the fluid is introduced into the left and right valve chambers 52 and 53 via Sekiguchi valves 57 provided in parts of the partition walls 55 and 56. It is something.

Next, when the plunger 33 is sucked in the direction of the arrow against the spring 34 by energizing the coil, the valve portion 28 closes the port 23 and conducts the port 25 and the low pressure side port 24. Then.

The high pressure fluid in the valve chamber 52 on the right side of the four-way switching valve 51 flows out from the low pressure side port 24 and becomes low pressure, and some ports 23 are closed. Since the valve element 54 flows through the valve chamber 53 and forms a high-pressure part, the valve body 54 moves to the right end together with the partition walls 55 and 56, thereby establishing electrical continuity between the vibro 0 and the vibrator 59.

Note that the vibrator 59 is under low pressure.

However, in such conventional technology, it is necessary to apply a large force to the plunger 33 that is at least equal to the resultant force of the force that compresses the spring 34 and the force that moves the plunger 33, so that the operation is fast. When the plunger 33 operates and collides with the end cap 38, the plunger collides with the end cap at a considerable speed, resulting in a fairly loud banging sound.

In addition, under such conditions, mechanical damage to the plunger and end cap is severe and the parts must be replaced in a short period of time, which not only reduces work efficiency but also increases production costs. Ta.

Furthermore, in the conventional technology, since a solenoid valve is used, a pilot system has to be used when using a part that requires a small actuation force and nine actuation forces. or,
To compensate for this, it is necessary to adopt a large device to generate the stroke and operating force, and in addition, it is economically disadvantageous because it is necessary to keep the solenoid valve energized at all times during operation. Met.

Furthermore, the use of electromagnets limits the materials that can be used, and when AC power is used, there are problems such as a humming noise occurring during power supply.

[Problem to be solved by the invention]

The purpose of the present invention is to improve the above-mentioned drawbacks of the prior art, to make the operation of the valve slow during operation, and to reduce the impact noise, thereby improving the function and life of the switching valve device. The present invention provides a switching valve device that can improve efficiency and work environment and reduce production costs.

[Means to solve the problem]

The present invention has the following technical configuration as a means for achieving the above object.

That is, in a valve having a fluid inlet and a plurality of fluid output ports in the valve body, selectively closing an end of the fluid output port located within the valve chamber of the valve; This valve has a slidable sliding part having an opening mechanism, a slow action element body having an operating shaft in contact with the sliding part, and a heat generating means for operating the operating element.

〔Example〕

A preferred embodiment of the present invention will be explained in the form of one embodiment with reference to FIG.

In FIG. 1, a valve device 8 according to the present invention has a main body 9 having a fluid inlet 10 and a plurality of fluid output ports 11, three in this case.
．． 12.13 A valve structure called a four-way switching valve is shown, and its main function is to switch the direction of fluid flow in equipment that uses fluid. be.

A slide portion 3 is provided in the valve chamber 14 within the main body 9, and a seat portion 7 that can selectively close and open the plurality of fluid output ports is attached to the slide portion 3.

The seat can slide on the surface of the valve body 15 in which the ends of the fluid output ports 11, 12, 13 are opened by the left and right sliding of the slide part.

The sheet must be sized to cover at least two fluid output ports depending on its position, and must be configured such that the two covered fluid output ports are in electrical communication within the sheet.

A class operating element 1 is attached to one end side of the valve device 8 of the present invention, and an operating shaft 16 of the class operating element 1 protrudes inside the valve chamber, and its tip is connected to the end surface of the slide portion 3. is in contact with.

On the other hand, a constant temperature heating element 2 is bonded to the outer end surface of the operating element of this class.

The constant temperature heating element generates heat using an appropriate heating means, heats the above-mentioned operating element, and displaces the operating shaft.

As the operating element of this class used in the present invention, a wax type thermo element, commonly called wax thermo element, can be used. It is also possible to use a shape memory alloy as the class operating element.

The constant-temperature heating element is not particularly limited, but any material that can be set at a constant temperature by appropriate means, such as a heater, may be used.

Therefore, when electricity is applied to the constant temperature heating element 2 to raise the temperature of the constant temperature heating element, when the class operating element 1 made of a wax thermometer is heated, the operating shaft 16 of the class operating element gradually extends to the left. While pushing back the slide part 3 to the left, the sheet 7 is slid in a circular motion to selectively close the fluid output port.
Open.

FIG. 1 shows a state in which the constant-temperature heating element 2 is energized, the class operating element 1 is activated, its operating shaft 16 is extended, and the slide portion 3 is pushed to the left against the spring 6. The output ports 11 and 12 are electrically connected, and the fluid output port 13 and the fluid inlet port 1 are connected to each other.
0 shows the state where it is electrically connected.

In such a situation, for example, fluid that has flowed in from the fluid inlet 10 flows out through the fluid output port 13 and exits from the fluid output port 1.
1, a flow path is formed in which the fluid is returned to the fluid source from the fluid output port 12.

Therefore, when the electricity supply to the constant temperature heating element 2 is stopped,
The spring 6 pushes back the slide portion 3 and the wax thermostat, so that the channels 10 and 11 are brought into electrical continuity, and the channels 12 and 13 are brought into electrical continuity.

The sheet 7 in the present invention may be formed integrally with the slide section, or may be formed separately from the slide section.

Furthermore, in one embodiment of the present invention, a stopper portion 17 may be provided to prevent excessive movement of the valve portion.

Further, in the present invention, a spring portion 5 is provided within the slide portion.
By providing the other sliding part 4 and making the strength of the spring part 5 greater than that of the spring part 6, the valve part can be prevented from being destroyed in the event of overload, and positioning during assembly can be simplified. .

The valve device according to the present invention has a simple structure and is easy to handle, so it can be used in a wide range of fields.

Therefore, even if it is used as a pilot valve for the four-way switching valve shown in FIG. 2 described above, it can fully perform its function.

Furthermore, in the present invention, since the valve is operated in a class motion using a class operating element, it is possible not only to reduce impact noise, but also because, unlike a solenoid valve, the class operating element itself generates force. There are no restrictions on materials and costs are reduced.

Furthermore, according to the present invention, the operating force is generated without using a large coil, so the valve device can be downsized.

Furthermore, according to the present invention, since the stroke of the sliding portion of the valve can be increased, the flow rate can be increased.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view showing an example of a valve device according to the present invention. FIG. 2 is a sectional view showing an example of a four-way switching valve device using a conventional electromagnetic valve device. 1, ... class operating element, 29. ... constant temperature heating element, 3, ... slide part, 4, ... slide part, 5, ... spring part, 6, ... spring part, 7゜8゜9゜10゜11゜14゜15゜16゜17゜...Seat part, ...Valve, ...Valve body, ...Fluid inlet, 12.13...Fluid output port, ...Valve chamber, ・... Valve part, ... Operating shaft, ... Part of the stopper.

Claims (1)

[Claims] 1. A valve having a fluid inlet and a plurality of fluid output ports, which is located in a valve chamber of the valve and can selectively close or open an end of the fluid output port that exists within the valve chamber. A valve characterized by having a slidable sliding part having a mechanism, a slow action element body having an operating shaft in contact with the sliding part, and a heat generating means for operating the slow action element.