JPS644107B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a water body that has a ball right above the hot water temperature control knob, so that when water flows from the bypass passage, the ball floats up and hits the wall of the bypass passage, so that no sound is produced. It concerns the structure of the water body.

Recently, there has been an increase in the number of water heaters that are installed outdoors due to safety and installation space considerations. It is attached to the hot water outlet side of the boiler, and when the outside air drops below freezing, water escapes from the low-temperature operating valve 2, preventing the equipment from freezing.

In addition, as shown in FIGS. 1 to 3, when the temperature control knob 3 of the water body 1 is opened and the bypass passage 4 is opened, the outside temperature is below freezing and the low temperature operation valve 2 is opened.
In order to prevent the water from flowing to the bypass passage 4 side and not flowing from the first outlet 1a to the heat exchanger 5 side and thereby causing the heat exchanger 5 to freeze and break, the water body 1 A ball 6 is provided in the passage chamber 1b directly above the hot water temperature control knob 3, and normally the bypass passage 4 is opened as shown in Fig. 3, and when the low temperature operation valve 2 is working, water is kept on the side of the bypass passage 4. The bypass passage 4 was closed as shown in Fig. 2 to prevent the flow of water. In the figure, 1c is the second exit, 1d is the entrance,
10 is a water inlet.

However, in the above structure, when a normal water heater is used, the ball 6 floats due to the pressure difference when the water volume is within the operating range of the water body 1, and the water flows through the bypass passage 4. At that time, the ball 6 hits the wall surface of the bypass passage 4. However, there was a drawback that abnormal noises were generated due to metal-to-metal contact.

The present invention eliminates the above-mentioned conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In FIG. 4, a rubber or resin cushioning material 9 is coated around a metal ball 6, and the other configurations are the same as the conventional example shown in FIGS. 1 and 2.

In the above structure, when the outside temperature drops below freezing with the hot water temperature control knob 3 of the water body 1 open, the low-temperature operation valve 2 operates to drain water, but the amount of water is small and the specific gravity of the ball 6 Since the ball 6 is large, the ball 6 fits into the valve seat 7 and closes the bypass passage 4. Therefore, all the water passing through the water body 1 flows through the heat exchanger 5 from the first outlet 1a, and then flows through the inlet 1
d, the water flows through the passage chamber 1b of the water body 1 and the second outlet 1c to the low temperature operating valve 2, so that the heat exchanger 5 will not freeze and be destroyed even if the temperature drops below freezing.

Next, when using a normal water heater, the amount of water flowing through the water body 1 increases, so the inlet 1d part of the water body 1 that leads to the outlet of the heat exchanger 5 and the bypass passage part 4
A differential pressure is generated between the valve seat 7 and the ball 6, which causes the ball 6 to separate from the valve seat part 7 and float up. At that time, the ball 6 hits the wall surface of the bypass passage 4, but since the ball 6 is coated with a cushioning material 9, No abnormal noise is generated due to contact between 6 and metal.

As described above, according to the present invention, the following effects can be obtained.

(1) When the outside temperature drops below freezing and the low-temperature operation valve 2 operates with the hot water temperature control knob 3 of the water body 1 open, water flows through the heat exchanger 5, causing the heat exchanger 5 to freeze. It will no longer be destroyed.

(2) When using the water heater with the hot water temperature control knob 3 open, the ball 6 will come into contact with the wall of the bypass passage 4, but since the ball 6 is coated with a cushioning material 9, no abnormalities will occur. No sound will be generated.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the water passage of a water heater using a water body of the bypass mixing type, FIG. 2 is an enlarged cross-sectional view of the bypass mixing portion of a water controller according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view showing a state in which the ball floats up and comes into contact with the bypass passage when the water heater is normally used, and FIG. 4 is an enlarged cross-sectional view of the bypass mixing section. 1... Water body, 2... Low temperature operation valve, 3... Hot water temperature adjustment knob, 4... Bypass passage, 5... Heat exchanger, 6... Ball, 7... Ben seat, 8... Spring, 9...Buffer material.

Claims (1)

[Claims] 1 A first outlet and an inlet connected to the inlet and outlet sides of the heat exchanger, a second outlet connected to a low-temperature operating valve that is located downstream of this inlet and operates to remove water when the outside temperature is low, and this It has a water body consisting of a second outlet, a bypass passage connecting the inlet and the first outlet, a hot water temperature control knob for adjusting the opening degree of this passage, and an inlet, and the bypass passage and the inlet of this water body. In the passage chamber communicating with the second outlet, there is a metal plate that closes the bypass passage when the hot water temperature control knob is open and the low-temperature operation valve opens, and normally floats up with the water flow and opens the bypass passage. Inside the ball,
This water controller has a cushioning material coated on the outer surface of the ball.