JPS5845544B2 - antifreeze valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-freeze valve that automatically discharges water in water heaters and pipes when the water is at freezing temperature in cold regions to prevent accidents such as bursting. It is.

Conventionally, in water heaters and the like, several types of antifreeze valves have been used to prevent pipes from bursting due to freezing of water.

By the way, such anti-freeze valves operate by detecting the water temperature in the pipe or the outside temperature near the anti-freeze valve and drain water, but they are usually used in pipes in locations other than where the anti-freeze valve is installed. If the internal and external temperatures are significantly lower than the temperature at the installation location, a freeze-breaking accident may occur even if an anti-freeze valve is installed, so if an anti-freeze valve is installed, it must be installed in the location most prone to freezing. The installation location had to be considered extremely carefully.

It is an object of the present invention to solve these conventional problems and provide an antifreeze valve that is easy to install and operates reliably.

In order to achieve this object, the present invention provides an outer frame housing having a water inlet and a water outlet, and a water channel between the inlet and the water outlet, and an outer frame housing provided within the outer frame housing. A valve body for opening and closing an opening of a nozzle provided in the water channel, an elastic diaphragm connected to the valve body via a connecting member and arranged to face the opening of the nozzle, and a peripheral portion of the elastic diaphragm. A sealed chamber unit that forms a sealed chamber by being fixed to the periphery of a dish-shaped outer frame, and a temperature-sensitive substance that causes a volume change at a temperature of about 0 to 5 degrees Celsius is sealed in the sealed chamber, and this sealed chamber unit. The device includes a sensing chamber that communicates with a closed chamber through a thin tube, and an outside temperature sensing unit in which the temperature-sensitive substance is sealed inside the sensing chamber.

With this configuration, the outside air temperature detection unit can be installed in a location different from the installation location of the antifreeze valve body, and by installing this outside air temperature detection unit in an appropriate location, accurate outside temperature can be determined. Can be detected.

Hereinafter, one embodiment of the present invention will be described using the drawings of FIGS. 1 to 4.

In the figure, 1 is an outer frame body, and this outer frame body 1
is provided with an inlet port 1a and a drain port 1b for water communicating through a water channel formed inside, and the cylinder portion having the inlet port 1a is held by a ring 2 to prevent it from being removed from the outer frame body 1. A metal fitting 3 is provided for mounting the equipment.

Reference numeral 4 denotes an adjustment screw having a nozzle 4a for regulating the amount of water flowing inside the outer frame body 1, which is screwed into the wall surface between the inlet 1a and the outlet 1b of the outer frame body 1, Thereby, the nozzle 4a is arranged in the waterway so as to form a part of the waterway.

5 is a seal ring, which connects the outer frame body 1 and the adjustment screw 4;
It is used for sealing.

Reference numeral 6 denotes a dish-shaped outer frame, which together with the outer frame case body 1 constitutes an outer frame case.

Reference numeral 7 denotes an elastic diaphragm, and the periphery of the elastic diaphragm 70 is fixed to the outer frame 6 by winding the periphery of the open end of the outer frame 6, soldering with ring-shaped solder, etc.

A sealed chamber is formed by the outer frame 6 and the elastic diaphragm 7, and a temperature-sensitive substance 8 such as freon, which undergoes a rapid volume change at a temperature of about 0 to 5 degrees Celsius, is sealed in this sealed chamber. A closed room unit is constructed.

Further, this sealed chamber unit is attached to the outer frame body 1 so that the elastic diaphragm 7 faces the opening of the nozzle 4a of the adjusting screw 4.

Reference numeral 9 denotes a connecting rod (connecting member) with one end fixed to approximately the center of the elastic diaphragm 7, and the other end of this connecting rod 9 has a rubber valve (valve body) for opening and closing the opening of the nozzle 4a of the adjusting screw 4. 10
is fitted.

The rubber valve 10 also includes a head 10a that presses the adjusting screw 4 into and out of the nozzle 4a to regulate drainage, and an annular peripheral edge 10b that is integrally formed at the end of the head 10a. It is hat-shaped.

Reference numeral 11 denotes a skirt-like rubber plate into which the head 10a of the rubber valve 100 is inserted. The peripheral edge of the rubber plate 110 is in close contact with the inner surface of the outer frame body 1.

Reference numeral 12 denotes an outside air temperature detection unit, and a sensing chamber inside this outside air temperature sensing unit 12 communicates with the closed chamber of the closed room unit through a flexible thin tube 13, so that the temperature-sensitive substance is contained in the sensing chamber. 8 will be enclosed.

The outside air temperature detection unit 12 and the thin tube 13 are made of copper, which has good heat conductivity, in order to efficiently detect the outside air temperature. I'm getting lost.

Note that when the temperature-sensitive substance 8 is enclosed in the sensing chamber of the outside air temperature detection unit 12 and the sealed chamber of the sealed room unit,
By enclosing from the outside temperature detection unit 12 side, the enclosing work can be easily performed.

Reference numeral 14 denotes a metal plate made of a metal with good thermal conductivity such as aluminum, which also serves as a name plate. This metal plate 14 is in contact with the outer frame 6 and is used to efficiently transmit outside air temperature.

In the above configuration, when the outside temperature is normal temperature, the rubber valve 1
0 is a state in which the adjustment screw 4 is pressed against the opening of the nozzle 4a by the bending of the elastic diaphragm 7, and the opening of the nozzle 4a is blocked, and the water is stopped within the outer frame body 1 (inflow port 1a). .

When the outside temperature drops to near freezing temperature, the volume of the temperature-sensitive substance 80 contracts, the elastic diaphragm 7 bends, and the rubber valve 1
0 is separated from the opening of the nozzle 4a, and the water in the pipe is drained to the outside through the nozzle 4a.

Here, since the anti-freeze valve in this embodiment is provided with an outside air temperature detection unit 12 separately from the closed room unit that detects the outside air temperature around the anti-freeze valve, in addition to the outside air temperature around the anti-freeze valve, It is possible to detect the outside air temperature in a place that is prone to freezing, so there are no restrictions on the installation location of the antifreeze valve, and the outside air temperature detection unit 12 can be installed freely.
This makes it possible to accurately detect the outside temperature and ensure reliable anti-freeze operation.

In addition, since the closed room unit and the outside temperature detection unit 12 are communicated through a flexible thin tube 13, the installation location of the outside temperature detection unit 12 can be changed in various ways without leaving the main body of the antifreeze valve installed. can do.

As described above, according to the antifreeze valve of the present invention, there are no restrictions on the installation location of the antifreeze valve main body, and it can be easily installed. It becomes possible to accurately detect the outside temperature and perform reliable anti-freezing operations.

[Brief explanation of the drawing]

Figures 1a and b are front and side views showing the external appearance of an antifreeze valve according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the internal structure of the antifreeze valve, and Figure 3 is an antifreeze valve. FIG. 4 is a top view of the main parts of the valve, and is a sectional view taken along the line A--A in FIG. 3. 1...Outer frame body, 1a...Inflow port, 1b...Drain port, 4...Adjustment screw,
4a... Tuzzle, 6... Outer frame, 7...
...Elastic diaphragm, 8...Temperature-sensitive substance, 10...
... Rubber valve, 12 ... Outside air temperature detection unit, 13 ... Thin tube.

Claims (1)

[Scope of Claims] 1. An outer frame housing having a water inlet and a water outlet and a water channel between the water inlet and the water drain, and a water channel provided in the outer frame housing. a valve body that opens and closes an opening of a provided nozzle; an elastic diaphragm connected to the valve body via a connecting member and arranged to face the opening of the nozzle;
A sealed chamber was formed by fixing the periphery of this elastic diaphragm to the periphery of the dish-shaped outer frame, and a temperature-sensitive substance that caused a volume change at a temperature of about 0 to 5 degrees Celsius was sealed in the sealed chamber. An anti-freeze valve comprising: a closed chamber unit; and an outside temperature detection unit having a sensing chamber communicating with the closed chamber of the closed chamber unit through a thin tube, and sealing the temperature-sensitive substance in the sensing chamber. 2. The antifreeze valve according to claim 1, wherein the outside air temperature detection unit and the thin tube are made of copper. 3. The antifreeze valve according to claim 1, characterized in that the thin tube has flexibility.