JP2021042799A - Freeze prevention device - Google Patents

Abstract

To provide a freeze prevention device which can operate a temperature-sensing switching valve body at favorable responsiveness with respect to a temperature change of atmospheric air.SOLUTION: A freeze prevention device 5 for preventing a freeze of piping has: a main body part 10 having a flow-out port 12 connected to the piping in a flow passage and making retained water in the piping flow out, and a discharge port F1 for discharging the retained water flowing out of the flow-out port 12 to the outside; and a temperature-sensing switching valve body 20 arranged in the main body part 10, and switching an opening/closing state of the flow-out port 12 by elongation/contraction in a pipe axial direction accompanied by a temperature change of atmospheric air which is taken into the main body part 10, being the switching valve body 20 for maintaining the flow-out port 12 in a valve-closed state when the atmospheric air taken from the discharge port F1 is equal to or higher than a prescribed temperature, valve-opening the flow-out port 12 by the fact that the atmospheric air taken from the discharge port F1 becomes lower than the prescribed temperature, and valve-closing the flow-out port 12 once again by a water temperature which becomes equal to or higher than the prescribed temperature of the retained water which is discharged accompanied by the valve-opening; and a ventilation port F2 which forms an opening different from the discharge port F1 at the main body part 10.SELECTED DRAWING: Figure 6

Description

The present invention relates to an antifreeze device. More specifically, the present invention relates to an antifreezing device for preventing freezing of pipes.

As an antifreezing device for preventing freezing of a pipe, a temperature-sensitive switching valve body is known to allow accumulated water to flow out from the pipe when the outside air falls below a predetermined temperature (Patent Document 1). Specifically, in the switching valve body, when the outside air taken in from the discharge port becomes lower than a predetermined temperature, the outlet connected to the pipe is opened and the accumulated water is discharged. Then, the switching valve body is returned to a state in which the outlet is closed by a water temperature that is equal to or higher than the predetermined temperature of the discharged stagnant water.

Japanese Patent No. 6308653

In the above-mentioned conventional technique, since only the discharge port is open to the outside air, it is difficult for the outside air to be taken in, and there is a concern that the switching valve body does not operate with good responsiveness. Therefore, the present invention provides an antifreezing device capable of operating a temperature-sensitive switching valve body with good responsiveness to a change in the temperature of the outside air.

In order to solve the above problems, the antifreeze device of the present invention takes the following measures.

That is, the antifreeze device of the present invention is an antifreeze device that prevents the pipe from freezing, and has an outlet connected to the pipe to allow the accumulated water in the pipe to flow out and the accumulated water flowing out from the outlet. A temperature-sensitive switch that switches the open / closed state of the outlet by expanding and contracting in the pipe axis direction with a main body having a discharge port for discharging to the outside and a main body provided in the main body and accompanying a temperature change of the outside air taken into the main body. In the valve body, when the outside air taken in from the outlet is above the specified temperature, the outlet is kept closed, and when the outside air taken in from the outlet is below the specified temperature, the outlet is opened. It has a switching valve body that closes the outlet again at a water temperature that is equal to or higher than a predetermined temperature of the retained water discharged when the valve is opened, and a vent that forms an opening different from the discharge port in the main body.

According to the above configuration, by forming a ventilation port different from the discharge port in the main body portion, the air in the main body portion can be easily circulated and the outside air can be easily taken into the main body portion. As a result, the temperature-sensitive switching valve body can be operated with good responsiveness to changes in the temperature of the outside air.

Further, the antifreeze device of the present invention may be further configured as follows. Both the outlet and the vent open in the direction of gravity.

According to the above configuration, it is difficult for foreign matter to enter the discharge port and the ventilation port and residual water is less likely to remain, so that it is possible to prevent clogging of these. Further, since the discharge port and the ventilation port are formed at positions that are difficult for the user to see, the antifreeze device can be formed to look good.

Further, the antifreeze device of the present invention may be further configured as follows. The main body is snap-fitted to the ring-shaped seat plate that is applied to the end of the switching valve body on the discharge port side and the end of the main body on the discharge port side in an expansive manner from the inner peripheral side. It has an open ring-shaped locking ring that supports from the discharge port side. The outlet consists of a seat plate and a ring hole in the locking ring. The vent comprises a circumferential gap between the ends of the opening ring of the locking ring and a radial gap between the outer peripheral surface of the seat plate and the inner peripheral surface of the main body communicating with the gap.

According to the above configuration, the outlet and the vent are provided by a ring-shaped seat plate provided at the end on the discharge port side for setting the switching valve body on the main body and an open ring-shaped locking ring for locking the seat plate. Can be rationally embodied.

It is a front view which showed the schematic structure of the antifreeze device which concerns on 1st Embodiment. It is a perspective view of the antifreeze device alone. It is a perspective view which looked at the antifreeze device from the bottom side. It is an exploded perspective view of the antifreeze device. FIG. 4 is an exploded perspective view of FIG. 4 viewed from below. It is a partial cross-sectional perspective view showing the internal structure of an antifreeze device. It is sectional drawing corresponding to FIG. 6 which showed the valve closed state of the switching valve body. It is sectional drawing corresponding to FIG. 6 which showed the valve opening state of the switching valve body.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<< First Embodiment >>
(About the outline configuration of the antifreeze device 5)
First, the configuration of the antifreeze device 5 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 8. In the following description, when each direction such as front-back, up-down, left-right, etc. is shown, it means each direction shown in each figure.

As shown in FIG. 1, the antifreeze device 5 according to the present embodiment is attached to the faucet main body 2 of the mixing faucet 1 attached to the wall surface of the bathroom. The mixing faucet 1 has a function of internally mixing and discharging hot water and water supplied from the back side of the wall surface of the bathroom.

Specifically, the mixing faucet 1 has two rear portions on the left and right sides of the faucet body 2 via a hot water supply pipe 3A and a water supply pipe 3B having an eccentric shape bent in a crank shape, respectively, on the wall surface. It is configured to be connected to a hot water connection port (not shown) formed at two positions on the left and right sides of the water heater. The mixing faucet 1 has a temperature control function that internally adjusts the mixing ratio of the supplied hot water, a switching function that switches the discharge stop of the mixed hot water, and an adjustment of the discharge amount that adjusts the amount of the discharged hot water. It has a function.

The adjustment of the mixing ratio of hot water and water is performed by operating a substantially cylindrical temperature control handle 2A attached to the side portion on the left side of the faucet main body 2. Further, the switching of the discharge stop water and the adjustment of the discharge amount are performed by operating the substantially cylindrical switching handle 2B attached to the side portion on the right side of the faucet main body 2.

Specifically, when the user adjusts the temperature control handle 2A to a desired rotation position, the mixing ratio of hot water mixed inside the faucet body 2 is adjusted to a set temperature according to the above rotation position. .. Further, when the user turns the switching handle 2B upward or downward from a predetermined water stop position (shown position), an amount of hot water corresponding to the amount of rotational movement is connected to the faucet main body 2 in a flow path (not shown). It is selectively discharged from the shower head or the faucet 4 of the above.

In the present embodiment, the switching handle 2B is turned upward to discharge hot water from a shower head (not shown), and the switching handle 2B is turned downward to discharge hot water from the curan 4. ..

The antifreeze device 5 is attached to the lower part of the faucet main body 2 and is connected to the pipe 2C passing through the faucet main body 2 in a flow path. The antifreeze device 5 has a function of preventing freezing of the accumulated water in the pipe 2C when the temperature in the bathroom (outside air) becomes a low temperature lower than a predetermined temperature.

Specifically, when the outside air is at a predetermined temperature or higher at which the retained water does not freeze, the antifreeze device 5 is held in a state where the connection flow path with the pipe 2C is closed. As a result, the accumulated water in the pipe 2C is held in a sealed state so as not to leak from the inside of the pipe 2C to the outside.

However, when the outside air becomes a low temperature lower than a predetermined temperature, the antifreeze device 5 opens the connection flow path with the pipe 2C and discharges the accumulated water in the pipe 2C to the outside little by little. As a result, the antifreeze device 5 causes a flow of water in the pipe 2C to prevent the stagnant water in the pipe 2C from freezing.

After the valve is opened, the antifreeze device 5 is brought into contact with the pipe 2C again by coming into contact with the water temperature which is equal to or higher than the predetermined temperature of the accumulated water as the accumulated water in the pipe 2C is discharged to the outside. Close the connection flow path. That is, the accumulated water in the pipe 2C is usually kept in a state of several degrees higher than that of the outside air even when the outside air becomes a low temperature of less than a predetermined temperature.

Therefore, as described above, the accumulated water in the pipe 2C is discharged into the antifreezing device 5, so that the antifreezing device 5 comes into contact with the water temperature equal to or higher than the predetermined temperature and is returned to the valve closed state. By repeating such an opening / closing operation, the antifreeze device 5 can appropriately prevent the stagnant water in the pipe 2C from freezing with a relatively small amount of drainage.

(Specific configuration of anti-freezing device 5)
Hereinafter, the specific configuration of the antifreeze device 5 will be described in detail. As shown in FIGS. 2 to 3, the antifreeze device 5 has a celestial circular tube shape extending in a vertically elongated shape as a whole.

The antifreeze device 5 has a configuration in which the upper end portion (connection portion 11) on the top plate side is connected to the pipe 2C in the faucet main body 2 described in FIG. 1 by a flow path. Further, as shown in FIG. 3, the antifreeze device 5 is configured to discharge the accumulated water flowing out from the inside of the pipe 2C to the outside through the opening portion (discharge port F1) on the bottom side thereof. The antifreeze device 5 is attached in a shape that hangs straight from the faucet main body 2 described in FIG. 1, and is in a state in which the pipe axis direction is directed straight in the direction of gravity.

Specifically, as shown in FIGS. 4 to 6, the antifreeze device 5 includes a main body portion 10 having a vertically long celestial circular tube shape and a temperature-sensitive switching valve set in the main body portion 10. It has a body 20, a ring-shaped washer 30 that forms a seat on the lower end side of the switching valve body 20, and an open ring-shaped C-ring 40 that holds the washer 30 so as not to come off from the main body 10. Here, the washer 30 corresponds to the "seat plate" of the present invention. Further, the C ring 40 corresponds to the "locking ring" of the present invention.

The main body 10 is formed in the shape of a celestial circular tube extending in a substantially cylindrical shape in the direction of the tube axis. At the upper end of the main body 10, a substantially hat-shaped connecting portion 11 is formed which is connected to the pipe 2C in the faucet main body 2 described in FIG. 1 by a flow path. A round hole-shaped outlet 12 that penetrates straight in the pipe axis direction is formed at the center of the pipe shaft of the connection portion 11.

Further, as shown in FIGS. 5 to 6, a circular opening 13 forming an opening on the bottom side is formed at the lower end of the main body 10. An annular groove 13A forming an annularly recessed groove is formed on the inner wall of the pipe on the lower end side of the main body 10 facing the opening 13. Further, as shown in FIG. 6, a stepped annular seat portion 14 is formed at the upper end portion of the inner wall of the pipe of the main body 10 so as to partially reduce the diameter of the inner wall of the pipe in a concentric manner. ..

As shown in FIGS. 4 and 6, the connecting portion 11 has a flange portion 11A protruding from the upper end portion of the main body portion 10 on the top plate side in a flange shape, and a barrel shape upward from the center portion of the top plate of the main body portion 10. It has a screw portion 11B that protrudes in a bulging shape. The screwed portion 11B has a configuration in which a male screw threaded spirally in the pipe axis direction is formed on the outer peripheral surface thereof.

The connecting portion 11 is integrally fastened to the connecting portion 11B by screwing the screwing portion 11B into a connection port (not shown) provided on the lower surface portion of the faucet main body 2 described in FIG. 1 from below. Attached to the state. By the same attachment, the outlet 12 formed at the center of the pipe shaft of the connection portion 11 is connected to the pipe 2C in the faucet main body 2 via the connection port.

The flange portion 11A is a seat that regulates the maximum screwing position of the screwed portion 11B into the connection port by abutting the peripheral portion of the connection port in the pipe axial direction. A concentric constricted portion 11C is formed at the base end portion of the screwed portion 11B. An O-ring 11D that functions as a sealing material is attached to the constricted portion 11C. By the O-ring 11D, the connecting portion 11 is fastened to the connecting port of the faucet main body 2 in a sealed state so as not to cause water leakage to the outside.

As shown in FIG. 6, the outlet 12 is formed so as to penetrate the center of the pipe axis of the connection portion 11 in the pipe axis direction and communicates with the space inside the pipe of the main body portion 10. An annular protrusion 12A is formed in the center of the back surface of the top plate of the main body 10 so as to project downward concentrically along the periphery of the outlet 12. The annular protrusion 12A is a non-pressing portion in which the rubber on-off valve 22 is pressed from below when the switching valve body 20, which will be described later, is closed.

As shown in FIGS. 5 to 6, the switching valve body 20 is inserted into the circular pipe from the opening 13 on the bottom side of the main body 10 and set. After the above setting, the switching valve body 20 is set by inserting the ring-shaped washer 30 and the open ring-shaped C ring 40 into the circular pipe from the opening 13 on the bottom side of the main body 10 as well. It is held as assembled in the circular tube of the main body 10.

The switching valve body 20 is a temperature-sensitive operation that autonomously expands and contracts in the pipe axis direction in accordance with the temperature change of the stagnant water in the above-mentioned pipe 2C taken into the pipe of the main body 10 and the outside air taken in from the opening 13. It is equipped with a valve mechanism of the type. Specifically, the switching valve body 20 includes a shaft portion 21 extending in the pipe axis direction, an on-off valve 22 assembled at the upper end of the shaft portion 21, and a spring force in the valve closing direction (upward direction) on the on-off valve 22. It has a temperature-sensitive spring 23 made of a shape memory alloy that acts on the valve, and a bias spring 24 that exerts a spring force in the valve opening direction (downward direction) on the on-off valve 22.

The shaft portion 21 has a structure in which an intermediate flange portion 25 projecting in a flange shape is integrally formed in an intermediate portion in the pipe axial direction. As shown in FIG. 6, the shaft portion 21 is inserted into the main body portion 10 from below until the upper end portion thereof is passed through the annular seat portion 14 formed in the upper end portion of the pipe inner wall of the main body portion 10. Is set.

According to the same set, the upper end of the shaft portion 21 is supported from the outer peripheral side by the annular seat portion 14 of the main body portion 10, and the intermediate flange portion 25 is supported from the outer peripheral side by the pipe inner wall of the main body portion 10. Will be done. As a result, the shaft portion 21 is supported with respect to the main body portion 10 so as to be slidable only in the pipe axis direction.

The on-off valve 22 is made of a rubber disc-shaped member, and is joined to the upper end portion of the shaft portion 21 in a superposed manner. The on-off valve 22 has a disk shape slightly larger than the annular protrusion 12A formed on the back surface of the top plate of the main body 10. As a result, the on-off valve 22 is pressed against the annular projection 12A from below by the valve closing operation of the switching valve body 20, and is widely pressed over the entire lower surface of the annular projection 12A to appropriately seal the outlet 12. You can do it.

The temperature sensitive spring 23 is composed of a spring member wound in a coil shape. The temperature-sensitive spring 23 is passed through the shaft portion 21 from below and is abutted against the intermediate flange portion 25 from below, and a ring-shaped washer 30 set in the main body portion 10 is abutted from below. Set to state. The washer 30 is configured to be locked to the main body 10 in a state of being locked to the main body 10 by an open ring-shaped C ring 40 that is subsequently set in the main body 10.

Therefore, by the above assembly, the temperature-sensitive spring 23 is brought into a state in which an upward spring force (elastic force) is applied to the intermediate flange portion 25 of the shaft portion 21 with the washer 30 as a fulcrum. The temperature-sensitive spring 23 has a characteristic of changing the hardness according to the temperature of the stagnant water in the above-mentioned pipe 2C taken into the pipe of the main body 10 and the outside air taken in from the opening 13.

Specifically, when the retained water or the outside air taken into the pipe of the main body 10 is at a predetermined temperature or higher, the temperature-sensitive spring 23 has a hardness that overcomes the spring force of the bias spring 24 and expands in the pipe axis direction. .. As a result, the on-off valve 22 is pressed from below against the annular protrusion 12A formed on the back surface of the top plate of the main body 10, and the outlet 12 is closed (see FIG. 7).

Further, when the stagnant water or the outside air taken into the pipe of the main body 10 is lower than the predetermined temperature, the temperature-sensitive spring 23 becomes soft and flexes by the spring force of the bias spring 24 and contracts in the pipe axis direction. .. As a result, the on-off valve 22 is pulled downward from the annular projection 12A of the main body 10 by the spring force of the bias spring 24, and the outlet 12 is opened (see FIG. 8).

As shown in FIGS. 5 to 6, the bias spring 24 is also made of a coiled spring member like the temperature sensitive spring 23. The bias spring 24 is passed through the shaft portion 21 from above and is abutted against the intermediate flange portion 25 from above, and is also abutted from below against the lower surface of the annular seat portion 14 formed at the upper end portion of the inner wall of the pipe of the main body portion 10. It is set in the hit state. As a result, the bias spring 24 is brought into a state in which a downward spring force (elastic force) is applied to the intermediate flange portion 25 of the shaft portion 21 with the annular seat portion 14 of the main body portion 10 as a fulcrum.

As shown in FIGS. 5 to 6, the washer 30 is composed of a thin plate-shaped ring member slightly smaller than the inner diameter of the inner wall of the pipe of the main body 10. After the switching valve body 20 is set in the pipe of the main body 10 from below, the washer 30 is passed through the opening 13 of the main body 10 and is passed through the temperature sensitive spring 23 of the switching valve 20 from below. It is set in the abutted state. With the same set, the washer 30 has a ring hole 31 in the center communicating with the opening 13 of the main body 10, and a radial gap T between the outer peripheral surface thereof and the inner peripheral surface of the inner wall of the pipe of the main body 10. (See FIG. 6).

The C ring 40 is composed of an open ring-shaped member slightly larger than the inner diameter of the inner wall of the pipe of the main body 10. In the C ring 40, after the switching valve body 20 and the washer 30 are set in the pipe of the main body 10 in order from the bottom, they are passed through the opening of the main body 10 and set as follows.

That is, first, the C ring 40 is passed through the opening 13 of the main body 10 while squeezing the open ring shape using a tool (not shown). Then, the squeezing force applied to the C ring 40 in the opening 13 is released. As a result, as shown in FIG. 6, the C ring 40 expands from the inner peripheral side into the annular groove 13A formed on the inner wall of the pipe on the lower end side of the main body 10 due to the elastic force accompanying the restoration. Snap fit fit.

As a result, the C ring 40 is integrally fixed to the inner wall of the pipe of the main body 10, and the washer 30 described above is supported at a fixed position from below. According to the above set, the ring hole 41 at the center of the C ring 40 is in a state of substantially concentrically communicating with the ring hole 31 of the washer 30 described above.

Therefore, the ring hole 31 of the washer 30 communicating in the pipe axis direction, the ring hole 41 of the C ring 40, and the opening 13 of the main body 10 allow the accumulated water that has flowed into the main body 10 to the outside. A discharge port F1 that can be discharged is formed. The discharge port F1 also functions as an intake port for taking in outside air into the main body 10.

Further, by setting the C ring 40 in the main body 10, the C ring 40 has a circumferential gap 42 between the ends of the open ring with the washer 30 and the inner wall of the main body 10. It is in a state of communicating with the gap T between them in the direction of the pipe axis. Therefore, the gaps 42 and T communicating with each other form a ventilation port F2 capable of ventilating the inside of the pipe of the main body 10 with the outside air at a place separated from the discharge port F1.

The main body 10 has a structure in which the ventilation port F2 is formed separately from the discharge port F1, so that air can be easily circulated inside the main body 10 and outside air can be easily taken in. As a result, the temperature-sensitive switching valve body 20 can be operated with good responsiveness to changes in the temperature of the outside air.

(Summary)
Summarizing the above, the antifreeze device 5 according to the first embodiment has the following configuration. In the following, the reference numerals given in parentheses are the reference numerals corresponding to the respective configurations shown in the above embodiments.

That is, it is an antifreeze device (5) that prevents the pipe (2C) from freezing, and has an outlet (12) that is connected to the pipe (2C) and causes the accumulated water in the pipe (2C) to flow out. It is provided in the main body (10) having a discharge port (F1) for discharging the accumulated water flowing out from the outlet (12) to the outside, and is taken into the main body (10). It is a temperature-sensitive switching valve body (20) that switches the open / closed state of the outlet (12) by expanding and contracting in the pipe axis direction due to the temperature change of the outside air, and the outside air taken in from the discharge port (F1) is at a predetermined temperature or higher. In some cases, the outlet (12) is kept closed, and when the outside air taken in from the outlet (F1) falls below a predetermined temperature, the outlet (12) is opened and the stagnation is discharged as the valve is opened. A switching valve body (20) that closes the outlet (12) again when the water temperature exceeds a predetermined temperature of water, and a vent (F2) that forms an opening different from the discharge port (F1) in the main body (10). ) And.

According to the above configuration, by forming a vent (F2) different from the discharge port (F1) in the main body (10), the air in the main body (10) can be easily circulated and the main body (10) can be easily circulated. 10) The outside air is easily taken into the inside. As a result, the temperature-sensitive switching valve body (20) can be operated with good responsiveness to changes in the temperature of the outside air.

Further, both the discharge port (F1) and the ventilation port (F2) open in the direction of gravity. According to the above configuration, it is difficult for foreign matter to enter the discharge port (F1) and the ventilation port (F2) and residual water is less likely to remain, so that it is possible to prevent clogging. Further, since the discharge port (F1) and the vent port (F2) are formed at positions that are difficult for the user to see, the antifreeze device (5) can be formed to look good.

Further, the ring-shaped seat plate (30) in which the main body (10) is applied to the end of the switching valve body (20) on the discharge port (F1) side and the discharge port (F1) side of the main body (10). It has an open ring-shaped locking ring (40) that is snap-fitted from the inner peripheral side to the end of the seat plate (30) to support the seat plate (30) from the discharge port (F1) side. The discharge port (F1) is composed of a ring hole (31, 41) of a seat plate (30) and a locking ring (40). The vent (F2) has a circumferential gap (42) between the ends of the opening ring of the locking ring (40) and the outer peripheral surface of the seat plate (30) and the main body (10) communicating with the gap (42). ) Consists of a radial gap (T) with the inner peripheral surface.

According to the above configuration, a ring-shaped seat plate (30) provided at the end on the discharge port (F1) side for setting the switching valve body (20) on the main body (10) and an opening ring for locking the ring-shaped seat plate (30). The shaped locking ring (40) allows the outlet (F1) and vent (F2) to be reasonably embodied.

<< About other embodiments >>
Although the embodiments of the present invention have been described above using one embodiment, the present invention can be implemented in various embodiments shown below in addition to the above embodiments.

1. 1. The antifreeze device of the present invention can be applied not only to a mixing faucet but also to a pipe of another faucet fitting such as a single faucet. It can also be applied to piping provided inside or outside the faucet fitting. Further, the antifreeze device may be connected so as to extend laterally or diagonally downward with respect to the pipe. The main body may be made of a tubular member other than a circular tube such as a square tube. Further, the main body portion is not limited to the tubular member, and may be made of a box-shaped or irregularly shaped member.

2. The discharge port of the main body may be provided so as to open in the pipe wall of the main body in addition to the direction of gravity. Similarly, the vent may be provided so as to open in the pipe wall of the main body in addition to the direction of gravity of the main body. The discharge port and the ventilation port may be provided separately in the pipe axis direction of the main body and the pipe wall.

The outlet and the vent are not limited to those having a specific opening shape, but may have various opening shapes. The size relationship between the outlet and the vent may be the same as each other, or either may be set to be larger. Further, the discharge port and the ventilation port may be provided at a plurality of locations in a dispersed manner.

3. 3. The temperature-sensitive switching valve body may be configured to expand and contract in the pipe axis direction as the temperature inside the main body changes due to the action of the wax type thermoelement. The set temperature for switching the opening and closing of the switching valve body is appropriately set freely, and is not limited to a specific temperature.

1 Mixing faucet 2 Faucet body 2A Temperature control handle 2B Switching handle 2C Piping 3A Hot water supply pipe 3B Water supply pipe 4 Callan 5 Antifreeze device 10 Main body 11 Connection 11A Flange 11B Screwing 11C Constriction 11D O-ring 12 Flow Outlet 12A O-ring protrusion 13 Opening 13A O-ring groove 14 O-ring seat 20 Switching valve body 21 Shaft 22 On-off valve 23 Temperature-sensitive spring 24 Bias spring 25 Intermediate flange 30 Washer (seat plate)
31 Ring hole 40 C ring (locking ring)
41 Ring hole 42 Gap T Gap F1 Outlet F2 Ventilation

Claims (3)

An anti-freezing device that prevents the piping from freezing.
A main body having an outlet that is connected to the pipe and allows the accumulated water in the pipe to flow out, and an outlet that discharges the accumulated water that has flowed out from the outlet to the outside.
A temperature-sensitive switching valve body provided in the main body and switching the open / closed state of the outlet by expansion and contraction in the pipe axis direction due to a temperature change of the outside air taken into the main body, and is taken in from the discharge port. When the outside air is above a predetermined temperature, the outlet is kept in a closed state, and when the outside air taken in from the outlet is below the predetermined temperature, the outlet is opened and discharged along with the opening. The switching valve body that closes the outlet again at a water temperature that exceeds the predetermined temperature of the stagnant water.
An antifreeze device having a vent that forms an opening different from the discharge port in the main body. The antifreeze device according to claim 1.
An antifreeze device in which both the discharge port and the ventilation port open in the direction of gravity. The antifreeze device according to claim 2.
The main body is snap-fitted to the ring-shaped seat plate that is applied to the end of the switching valve body on the discharge port side and the end of the main body on the discharge port side in an expanded manner from the inner peripheral side. It has an open ring-shaped locking ring that is combined and supports the seat plate from the discharge port side.
The discharge port is composed of the seat plate and the ring hole of the locking ring, and the vent is a circumferential gap between the ends of the opening ring of the locking ring and the seat plate communicating with the gap. An antifreeze device consisting of a radial gap between the outer peripheral surface and the inner peripheral surface of the main body.

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