JPH0437979Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to improvements in a check valve with a ventilation valve used in a water heater with a reheating mechanism for a bathtub.

Water heater A with a reheating mechanism used for bathtubs is
Normally, as shown in Fig. 1, hot water stored in a water heater B such as a boiler is guided through a hot water pipe 1 to a hot water faucet b facing a bathtub a, and the hot water pipe 1 is connected to the bathtub a. A solenoid valve is connected to the circulation pipe 2 which communicates with the heating bath pot c via a bathtub hot water supply pipe 3, and is connected to the bathtub hot water supply pipe 3 and is controlled by a level sensor S provided in the bathtub a.
The SV is provided so that when the amount of hot water in the bathtub a falls below a predetermined level, hot water is automatically supplied to the bathtub a.

The bathtub hot water supply pipe 3 branched from the hot water supply pipe 1 and connected to the circulation pipe 2 is equipped with a vent valve in order to completely prevent the hot water in the bathtub a from flowing back into the hot water supply pipe 1 side. A check valve 4 is provided.

In this way, the check valve 4 with the ventilation valve installed in the bathtub water supply pipe 3 is installed inside the valve box 40, which has an inlet 41 on the upper side and an outlet 42 on the lower side, as shown in FIG. On one side, near the inlet 41, there is a valve port 43 through which water (or hot water) flows from the inlet 41 into the valve box 2 and toward the outlet 42, and the valve port 43 can be freely advanced and retreated from the bottom side. The valve port 4 is opposite to the
3 is provided with a check valve mechanism w consisting of a valve body 44 for a check valve that opens and closes the valve body 3, and a vent hole 45 on the other side of the valve box 40 that communicates the inside of the valve box 40 with the outside, and a vent hole 45 on the lower surface thereof. A vent valve mechanism y consisting of a valve body 46 for a vent valve that opens and closes the vent port 45 and faces freely forward and backward from the side is provided. A lever rod 48 that swings and rotates is provided, and one arm 48a of the lever rod 48 supports the valve body 44 of the check valve mechanism w, and the other arm 48b supports the rotary end. The valve body 46 of the vent valve mechanism y is supported by the arm 48b of the vent valve mechanism y, and the arm 48b is lowered as shown in FIG. It is constructed by providing a balancer G to balance the state. and,
As a result, when the pressure on the secondary side connected to the outlet 42 is lower than the pressure on the primary side connected to the inlet 41, the valve body 44 of the check valve mechanism w is pushed down and the valve port 43 opens, and at the same time As a result of this operation, the lever 48 rotates clockwise around the support shaft 47 in FIG. When the blockage occurs and the pressure on the primary side connected to the inlet 41 decreases due to water outage, etc., the pressure that presses down the valve body 44 of the check valve mechanism w disappears, and the valve body 44 becomes a lever. The counterclockwise rotation due to the weight of the balancer G of 48 raises the check valve mechanism w.
At the same time, the valve body 46 of the vent valve mechanism y is lowered by the rotation of the lever 48 to open the vent port 45 of the vent valve mechanism y, and the secondary side leading to the outlet 42 is closed. It is configured to communicate with the outside through the inner cavity of the valve box 40 and through the vent 45.

In this way, a hot water supply device A with a reheating mechanism for a bathtub is provided with a check valve 4 with a ventilation valve in a bathtub hot water supply pipe 3.
When the pressure on the primary side decreases, the secondary side communicates with the outside through the vent 45 as shown in FIG.
This will completely prevent it from being sucked up to the side.

However, when opening the solenoid valve SV and supplying hot water from the hot water supply pipe 1 side to the circulation pipe 2 into the bathtub a via the check valve 4 with a vent valve, the check valve 4 with a vent valve A portion of the water (or hot water) flowing through the box 40 remains open for a short time until the valve body 46 of the vent valve mechanism y completely seals the vent 45. It leaks to the outside through the vent hole 45. This has led to the problem that piping work must be carried out so that the check valve 4 with ventilation valve is located at a position where there will be no problem even if water is discharged. There is.

The present invention was made to solve this problem, and when the hot water is being supplied, the valve body 44 of the check valve mechanism w is pushed down, and the valve body 44 of the ventilation valve mechanism y is pressed down. Until the vent 45 is closed, a portion of the water (or hot water) flowing through the valve box 40 toward the outlet 42 while pushing down the valve body 44 of the check valve mechanism w, It is an object of the present invention to provide a new means for configuring a check valve with a vent valve that prevents leakage to the outside from a vent port 45.

In the present invention, as a means to achieve this purpose, a check valve mechanism is provided in a valve box equipped with an inlet, an outlet, and a vent in the vicinity of the inlet, and a check valve mechanism is provided in the vicinity of the inlet. In the check valve with a vent valve, which is provided with a vent valve mechanism that closes the vent port by opening the valve body of the valve mechanism, the vent valve mechanism prevents hot water (or water) flowing from the inlet into the valve box. A communication flow path is formed that is shut off from the valve chamber housing the valve body of the vent valve mechanism and flows to the outlet, an ejector is installed in the communication flow path, and the suction port of the ejector is connected to the valve chamber of the vent valve mechanism. This invention proposes a check valve with a ventilation valve that communicates with a valve chamber housing a body through a communication port.

Next, embodiments will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the previous means are used for components having the same effect.

Figure 3 shows a check valve 4 with a vent valve that can implement the present invention.
40 is a vertical front view of the valve box;
41 is an inlet of the valve box 40, 42 is an outlet, w is a check valve mechanism provided inside the valve box 40, y is a ventilation valve mechanism provided inside the valve box 40, and z is an ejector provided inside the valve box 40. shows.

The check valve mechanism w includes a valve port 43 for a check valve with the axial direction being the vertical direction, which is installed at a position immediately inside the inlet 41 provided on one side of the upper surface of the valve box 40. and a valve body 44 for a check valve that faces the valve body 44 so as to be movable from below. and a valve body 46 for a vent valve that opens and closes the vent port 45, facing it so as to be able to move forward and backward from below.
These valve bodies 44, 4 are normal ones consisting of
Reference numeral 6 denotes an arm 48a on one half side of the lever rod 48 that is pivotally supported in the valve box 40 so as to swing and rotate around the support shaft 47.
is supported by the rotating end of the arm 48b and the rotating end of the arm 48b on the other half, so that when one is in the valve-closed position, the other is in the valve-open position, and
Regarding the fact that the balancer G provided on the arm 48b that supports the valve body 46 for the vent valve maintains the vent valve mechanism y in the open state and the check valve mechanism w in the closed state under normal conditions. is no different from the previous method.

However, inside the valve box 40, there is a valve chamber 44a for a check valve that accommodates the valve body 44 of the check valve mechanism w, and a valve chamber 46 for a vent valve that accommodates the valve body 46 of the vent valve mechanism y.
A partition wall 49 is provided to separate the valve opening 43 of the check valve mechanism w and the outlet 42 on the bottom side of the valve box 40 from the valve chamber 46a of the ventilation valve mechanism y. A communication channel 40a is provided for communication.

The valve body 44 of the check valve mechanism w is constructed by fitting a valve shaft 440 integrally connected to the lower surface side of the valve body 44 into a through hole provided in the partition wall 49 in a watertight manner. In addition, a lever rod 48 and a support shaft 47 for pivotally supporting it are provided in this chamber 40b, so that the chamber 40b is connected to the valve chamber 46a.
Arm 48 on one half side of lever rod 48 in 0b
b is connected to the aforementioned valve shaft 440.

Furthermore, an ejector z is installed in the communication channel 40a, and its suction port 50 is communicated with the communication port 490 provided in the partition wall 49, thereby blocking the communication channel 40a by the partition wall 49. The above-mentioned chamber 40b communicates with the communication channel 40a via the suction port 50 of the ejector z.

In the illustrated embodiment, reference numeral 51 denotes a blind cover 5 that closes an assembly hole 52 provided in the valve box 40 in order to assemble and mount the ejector z to the communication flow path 40a.
3 is a mesh cap assembled to the valve box 40 so as to cover the vent 45.

The check valve 4 with a vent valve according to the present invention configured as described above operates as follows.

The inlet 41 provided on the upper surface side and the outlet 42 provided on the lower surface side of the valve box 40 are connected to the bathtub hot water supply pipe 3 which branches from the hot water supply pipe 1 and connects to the circulation pipe 2, as shown in FIG. While connected in the middle,
Open the solenoid valve SV installed in the bathtub water supply pipe 3,
It is assumed that hot water (or water) is allowed to flow through the check valve 4 with a ventilation valve.

Then, the hot water flowing from the inlet 41 of the check valve 4 with a ventilation valve flows through the communication channel 40a while pushing down the valve body 44 of the check valve mechanism w, and flows from the outlet 42 on the lower surface side of the valve box 40. During this period, the water flows through the ejector z provided in the middle of the communication channel 40a.

As a result, the suction port 50 provided on the circumferential wall of the ejector z performs a suction operation by the flow of hot water passing through the ejector z at high speed,
Air from the side of the chamber 40b communicating with the suction port 50 is sucked.

Therefore, the inside of the chamber 40b that is continuous with the valve chamber 46a that accommodates the valve body 46 of the vent valve mechanism y becomes negative pressure, and the vent hole 45 of the vent valve mechanism y enters the chamber 40b.
Outside air flows into the communication channel 40a side through the suction port 50 and the hot water that flows in from the inlet 41 of the valve box 40 and flows out from the outlet 42 of the valve body 46 of the vent valve mechanism y. It is reliably prevented from flowing into the valve chamber 46a side that accommodates the air and leaking out from the vent hole 45.

Then, due to the flow of this hot water, the valve body 44 of the check valve mechanism w reaches the end of its downward operation, and as a result,
When the valve body 46 of the vent valve mechanism y is pushed up and pressed against the lower surface of the vent port 45 to reach the state shown in FIG. This will prevent hot water from leaking through the vent 45.

Next, in this state, the above-mentioned solenoid valve SV is closed, or the inlet 4 of the valve box 40 is closed due to a water outage, etc.
When the pressure on the primary side connected to 1 disappears or decreases, the lever 48 rotates due to the action of the balancer G, and the check valve mechanism w closes as shown in FIG. y is in an open state.

In this state, the secondary side connected to the outlet 42 of the valve box 40 is open to the outside by communicating with the open vent valve mechanism y via the suction port 50 of the ejector z. As a result, the secondary side and the primary side are completely shut off, completely preventing hot water from the secondary side from being drawn up into the primary side.

As explained above, the check valve with a vent valve according to the present invention has a check valve mechanism w located near the inlet 41 in the valve box 40, which is provided with an inlet 41, an outlet 42, and a vent 45. In the check valve with a vent valve, which is provided with a vent valve mechanism y that closes the vent port 45 by opening the valve body 44 of the check valve mechanism w, an inlet 41 is provided in the valve box 40.
The hot water (or water) flowing from the valve chamber 46a that accommodates the valve body 46 of the vent valve mechanism y is cut off from the outlet 4.
2, an ejector z is installed in the communication channel 40a, and a suction port 50 of the ejector z is connected to the vent valve mechanism y.
Since the valve chamber 46a that accommodates the valve body 46 is configured to communicate with the valve chamber 46a through the communication port 490, the communication flow path 40 from the inlet 41 to the outlet 42
When hot water (or water) flows through a, the ejector z provided there operates to create a negative pressure on the side of the valve chamber 46a that accommodates the valve body 46 of the vent valve mechanism y. Therefore, even when the valve body 44 of the check valve mechanism w is pushed down, the valve body 44 of the check valve mechanism w remains open until the valve body 46 of the ventilation valve mechanism y closes the vent 45. A portion of the water (or hot water) flowing inside the valve box 40 toward the outlet 42 while being pushed down,
This prevents leakage from the vent hole 45 to the outside.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic explanatory diagram of a water heater with a reheating mechanism, Fig. 2 is a longitudinal cross-sectional front view of a conventional check valve with a vent valve, and Fig. 3 is a longitudinal cross-sectional view of a check valve with a vent valve according to the present invention. The front view and FIG. 4 are explanatory views of the same operation. Explanation of drawing symbols, A... Water heater, B... Water heater, G... Balancer, S... Level sensor,
SV... Solenoid valve, a... Bathtub, b...
Hot water faucet, c...bath pot, w...check valve mechanism, y
...Vent valve mechanism, z...Ejector, 1...Hot water supply pipe, 2...Circulation pipe, 3...Bathtub hot water supply pipe, 4
...Check valve with vent valve, 40...Valve box, 40a
...Communication channel, 40b...Chamber, 41...Inlet, 4
2... Outlet, 43... Valve port, 44... Valve body for check valve, 44a... Valve chamber for check valve, 45... Vent port, 46... Valve body for vent valve, 46a ... Valve chamber for vent valve, 47 ... Support shaft, 48 ... Lever rod, 48
a, 48b...arm, 49...bulkhead, 440...
... Valve shaft, 490 ... Communication port, 50 ... Suction port, 5
1... Blind lid, 52... Assembly hole, 53... Net cap.

Claims (1)

[Scope of utility model registration request] A check valve mechanism w is provided in the vicinity of the inlet 41 in a valve box 40 having an inlet 41, an outlet 42, and a vent 45, and a valve body 44 of the check valve mechanism w is opened. In a check valve with a vent valve provided with a vent valve mechanism y that closes the vent port 45 when activated, hot water (or water) flowing from the inlet 41 is passed through the valve body of the vent valve mechanism y into the valve box 40. 46
A communication flow path 40a is formed that is shut off from the valve chamber 46a that accommodates the air flow and passes through the outlet 42, and an ejector z is installed in the communication flow path 40a, and the suction port 50 of the ejector z is connected to the ventilation A communication port 490 is provided to the valve chamber 46a that accommodates the valve body 46 of the valve mechanism y.
A check valve with a vent valve that communicates through the.