JPS6017578Y2 - Automatic release valve at low temperature - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic open valve at low temperatures for preventing water in outdoor water tanks such as water heaters and water storage tanks from freezing.

Conventional low-temperature automatic opening valves have two types: (1) a heat-sensitive part is exposed to the outside temperature and the valve is opened depending on the outside temperature at low temperatures, and (2) the temperature-sensing part senses the water temperature and opens the valve when the temperature is about to freeze. There are two types of valves that open the valve, and one that senses both the outside temperature and water temperature and opens the valve when the temperature is low.

However, in the case of the low-temperature automatic release valves of types 1 to 3 above, the temperature-sensing part is composed of a single temperature-sensing element, so even if the water temperature is higher than the freezing temperature, the air temperature will not change. The valve opens when the temperature of the water drops to freezing, causing the problem that water is wasted.

The object of this invention is to provide a low temperature automatic opening valve that advantageously solves the above-mentioned problems.

Next, this invention will be explained in detail using illustrated examples.

1 and 2 show a first embodiment of this invention, in which a temperature sensing elastic material 3 housed in an outside air communication chamber 2 in a cylindrical box 1 and water flow in the box 1 are shown. The water temperature sensing elastic material 7 housed in the chamber 6 is arranged on the center line of the box body 1 so that their expansion and contraction directions coincide, and the intermediate portion of the transmission member 8 made of a heat insulating material is connected to the outside air communication chamber 2. and the water flow chamber 6, and one end of the transmission member 8 is fitted into the movable plunger 13 of the temperature sensing telescopic member 3, and the other end of the transmission member 8 A seal ring 15 made of a rubber O-ring is provided between the spacer wheel 9 and the transmission member 8, and a seal ring 15 is provided between the spacer wheel 9 and the transmission member 8 to seal the outside air communication chamber in the box body 1. A ventilation hole 16 is provided around 2.

An annular valve seat 10 is fitted into the first water passage port 4 at the end of the box body 1, and a snap ring 17 for locking the valve seat 10 is fitted, and the water temperature sensing elastic material 7 is movable. One end of a valve body 19 is fitted into the plunger 18, the other end of the valve body 19 faces the valve seat 10, and between the flange of the one end of the valve body and the valve seat 10, A valve opening spring 11 made of a helical spring is interposed, and a second water passage port 5 communicating with the water passage chamber 6 is provided in the middle part of the box body 1.
is provided.

A stopper 20 made of a heat insulating material that engages the container 22 of the temperature sensing elastic material 3 is fitted to the spacer wheel 9 in the outside air communication chamber 2,
In addition, a snap ring 21 is fitted to the end of the box body 1 on the outside air communication chamber side, and between the snap ring 21 and the container 22 of the temperature sensing elastic material 3, there is an over-extension absorbing member made of a helical spring. A valve opening spring 12 is interposed, and the set load of this spring 12 is set to be stronger than the set load of the valve opening spring 11.

Next, the operation of the low temperature automatic release valve of the first embodiment will be explained.

When the air temperature and water temperature are higher than the freezing temperature, as shown in FIG.
expands and compresses the valve opening spring 11 while opening the valve body 1.
9 is moved and pressed against the valve seat 10, the first water port 4 is closed, and therefore the second water port 5 is moved from the first water port 4 to the second water port 5.
The flow of water to is stopped.

After the valve body 19 is pressed against the valve seat 10, when the air temperature sensing elastic member 3 and the water temperature sensing elastic member 7 are further expanded, the excess expansion is absorbed by the overextension absorbing spring 12 being compressed. .

Next, as the temperature decreases, the temperature sensing elastic member 3.7 shortens, so that the over-extension absorbing spring 12 expands and the container of the temperature sensing elastic member 3 moves to the stopper 20.
Then, the valve opening spring 11 expands to move the valve body 19 away from the valve seat 10 and the first water port 4 is opened, so water flows in from the first water port 4 and flows into the second water port 5.
flows out from.

In this case, a seal ring 15 is provided between the spacer 9 and the transmission member 8, and the transmission member 8 and the stopper 20 are made of a heat insulating member, so that the temperature sensing telescopic member 3 senses the temperature of the flowing water. Never.

When the temperature of the water flowing through the water passage chamber 6 increases, the water temperature sensing telescopic member 7 expands and presses the valve body 19 against the valve seat 10, so the first water passage port 4 is closed and the flow of water is stopped. .

Next, when the water temperature in the water passage chamber 6 decreases, the water temperature sensing elastic member 7 shortens, and the valve opening spring 11 moves the valve body 19 away from the valve seat 10, so that the first water passage port 4 opens. It will be opened and water will be flowing again.

Furthermore, even if the water temperature is low, when the air temperature rises, the air temperature sensing telescopic member 3 expands and presses the valve body 19 against the valve seat 10, so the first water passage port 4 is closed and the flow of water is stopped. .

When the outside air temperature drops to the freezing temperature (0 to 2 degrees Celsius), the temperature sensing telescopic member 3 contracts, so the valve opening spring 1
1, the valve body 19 is separated from the valve seat 10, and water flows in from the first water port 4 and is discharged from the second water port 5.
Water is prevented from freezing.

In addition, in cases where there is no risk of the temperature freezing, such as in solar water heaters or thermal water tanks, the water temperature sensing telescopic member 7 extends and presses the valve body 19 against the valve seat 10, thereby preventing wasteful outflow of water. Prevented.

FIG. 3 shows a second embodiment of this invention, in which the valve body 19 in the first embodiment is omitted, and the movable plunger 13 in the air temperature sensing telescopic member 3 and the movable plunger 18 in the water temperature sensing telescopic member 7 are used. Both ends of the transmission member 8 made of a heat insulating material are fitted, and a valve seat 10 made of rubber or synthetic resin is fitted to the valve seat holding member 23 which is locked to the first water passage port 4. Although the valve seat 10 is configured to be opened and closed by the bottom surface of the container 14, the other configurations are the same as in the first embodiment.

When implementing this idea, synthetic resin or other non-metallic materials are used as the heat insulating material constituting the transmission member 8 and the stopper 20.

The air temperature sensing elastic material 3 and the water temperature sensing elastic material 7 include, for example, a rubber sleeve fixed to the opening of the container, wax filled between the container and the rubber sleeve, and a movable material inserted into the rubber sleeve. A known wax-type temperature-sensitive elastic member consisting of a plunger is used.

Furthermore, water may be allowed to flow in through the second water port 5 and discharged from the first water port 4.

In this case, when the valve is opened, the water temperature sensing telescopic member 7 is shortened by the water temperature, and the air temperature sensing telescopic member 3 is shortened by the air temperature.

According to this invention, when the outside air temperature drops to the freezing temperature of water, the temperature sensing/sensing telescopic member is shortened, and the water temperature sensing telescopic member 7 and the transmission member 8 are moved in the valve opening direction by the valve opening spring 11. When the valve seat 10 of the first water passage port 4 is opened and the water temperature in the water passage chamber 6 drops to near freezing temperature, the water temperature sensing telescopic member 7 is shortened and the valve seat 10 of the first water passage port 4 is opened. Since the valve seat 1 of the first water inlet 4 is opened, it is possible to sense both a decrease in outside air temperature and a decrease in ice temperature separately.
Water can be prevented from freezing by allowing water to flow through the water opening 4 of the waist leather 1 through the second water opening 5, and between the air temperature sensing elastic member 3 and the water temperature sensing elastic member 7, Since the transmission member 8 made of a heat insulating material is interposed, temperature interference between the air temperature sensing elastic member 3 and the water temperature sensing elastic member 7 is eliminated.
The opening/closing accuracy of the air temperature sensing valve and the opening/closing accuracy of the water temperature sensing valve can be improved, and even if the outside temperature is below the freezing temperature of water, the water temperature in the water passage chamber 6 is high and there is no risk of freezing. Since the water temperature sensing expandable member 7 extends and closes the valve seat 10 of the first water passage port 4, wasteful discharge of water can be reliably prevented.

Further, after the valve seat 10 is closed, the amount of overextension when the air temperature sensing elastic member 3 and the water temperature sensing elastic member 7 are expanded is as follows.
Since it is absorbed by the overextension amount absorption spring 12,
Effects such as being able to prevent failure of the automatic open valve at low temperatures due to excessive elongation can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 show a low-temperature automatic opening valve according to the first embodiment of this invention, with Figure 1 being a longitudinal side view showing the valve in the closed state, and Figure 2 showing the valve in the open state. FIG. FIG. 3 is a longitudinal sectional side view showing a low temperature automatic release valve according to a second embodiment of the present invention. In the figure, 1 is a box body, 2 is an outside air communication chamber, 3 is a temperature sensing telescopic member, 4 is a first water inlet, 5 is a second water inlet, 6 is a water flow chamber, 7 is a water temperature sensing telescopic member, and 8 is a heat insulation member. Transmission member made of material,
9 is a partition wall, 10 is a valve seat, 11 is a valve opening spring, 12
13 is a spring for absorbing overextension, and 13 is a movable plunger.
14 is a container, 15 is a sealing, 18 is a movable plunger, 19 is a valve body, 20 is a stopper, and 22 is a container.

Claims (1)

[Scope of utility model registration request] A temperature sensing elastic member 3 housed in an outside air communication chamber 2 in the box body 1, and a water temperature sensing elastic member housed in a water passage chamber 6 having a first water passage port 4 and a second water passage port 5 in the box body 1. 7 are arranged on the same straight line so that their stretching directions match, and the transmission member 8 made of a heat insulating material interposed between the air temperature sensing elastic material 3 and the water temperature sensing elastic material 7 is connected to the outside air communication. A valve seat 10 is slidably fitted into the spacer wheel 9 between the chamber 2 and the water flow chamber 6, and the first water flow port 4 is provided with a valve seat 10 that is opened and closed directly or indirectly by the water temperature sensing elastic member 7. is,
A valve opening spring 11 is directly or indirectly engaged with the water temperature sensing elastic member 7 to separate it from the valve seat 10 against water pressure. The spring 12 for absorbing overextension is engaged, and the spring 12 for absorbing overextension is engaged, and the spring 12 for absorbing overextension is pressed in the valve closing direction. It also has a strong spring force, and a container 22 of the temperature sensing elastic material 3 is installed on the partition wall 9 side of the outside air communication chamber 2.
An automatic open valve at low temperatures characterized by being provided with a stopper 20 that engages.