JPS6150190B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic hot water temperature control valve that automatically adjusts the temperature of hot water taken out to a predetermined temperature in a water heater.

There are two types of water heaters: first-stop type and first-stop type. For small water heaters, if you use the stop type, water pressure is not applied to the boiler, so it can be manufactured at a lower cost, and there is no need to reduce the pressure during installation, which has the advantage of being cheaper. It will be done. However, with these small stop-off water heaters, the temperature of the hot water to be taken out must be adjusted at the inlet of the boiler, and there is a problem in that it is difficult to adjust the water temperature. In the past, water heaters using the stop-start method did not have a means to automatically adjust the temperature of hot water.

The present invention was made in view of and to solve the problems of the conventional technology, and can be easily assembled into a stop-off type water heater to automatically adjust the temperature of hot water supply. The purpose is to provide new means.

In the present invention, as a means for achieving this purpose, a water outlet connected to the water supply pipe side of the water heater, a mixed water inlet connected to the hot water supply pipe side of the water heater, and a water supply valve connected to the faucet side are provided. A water supply passage communicating the water inlet and the water outlet is provided in a valve box equipped with an inlet and a mixed water outlet connected to the hot water faucet, and the water supply passage is provided with a bypass on the water supply pipe side of the hot water heater. A bypass water supply passage that communicates with the water supply passage is branched, and a hot water supply passage that communicates the mixed water inlet and the mixed water outlet is provided, the water supply passage being closer to the water inlet than the bypass water supply passage,
A valve mechanism for changing and controlling the amount of water distributed to the bypass water supply passage and the water outlet is disposed, and the valve mechanism is connected to the wax thermoelement having a temperature sensing portion disposed in the hot water supply passage. The present invention proposes an automatic hot water temperature control valve for a water heater, characterized in that the valve is connected to increase the amount of water distributed to the bypass water supply passage as the temperature rises.

Next, embodiments will be described in detail with reference to the drawings.

In Figures 1 and 2, 1 is a water boiler, 2
1 shows an automatic hot water temperature control valve according to the present invention.

The water boiler 1 is connected to a valve box 20 of an automatic hot water temperature control valve 2 at its water supply pipe 10 side and hot water supply pipe 11 side. Reference numeral 13 indicates a heating pipe provided within the water boiler 1.

The valve box 20 of the automatic hot water temperature control valve 2 has a water outlet 21 connected to the water supply pipe 10 side, a mixed water inlet 22 connected to the hot water supply pipe 11 side, a water inlet 23 connected to the faucet side, and It is equipped with a mixed water outlet 24 connected to a hot water faucet, and the valve box 2
0 is provided with a water supply passage a that communicates the water inlet 23 and the water outlet 21, and a bypass water supply passage b is branched from the water supply passage a that communicates with the hot water supply pipe 11 side of the hot water boiler 1. , and a hot water supply passage c that communicates the mixed water inlet 22 and the mixed water outlet 24 is provided.

In the embodiment shown in FIGS. 1 and 2, the bypass water supply passage b communicates with a second water outlet 25 opened on the upper surface side of the valve box 20 in parallel with the water outlet 21, By connecting the lower end of the water supply pipe 14 branched from the hot water supply pipe 11 to the water supply pipe 11, a state is established in which the water supply pipe 11 side of the hot water boiler 1 is connected in a bypass manner through the second water outlet 25 and the water supply pipe 14. There is.

A valve mechanism 4 is disposed in the water supply passage a closer to the water inlet 23 than the bypass water supply passage b.
The valve mechanism 4 includes a valve guide surface 27 formed at the starting end of a partition wall 26 between the water supply passage a and the bypass water supply passage b.
and a valve 40 that slides along the valve guide surface 27;
A valve seat 41 for the water supply passage a and the bypass water supply passage b such that the front and rear ends of the valve 40 can collide with each other.
The valve 40 is fixed to a connecting rod 43 serving as a shaft so as to slide integrally therewith in the axial direction. 44 is an O-ring that maintains watertightness between the valve 40 and the valve guide surface 27, and 45 is a spring wound around the free end of the connecting rod 43 for adjusting the position of the valve 40.

The connecting rod 43 passes through the partition wall 28 between the water supply passage a and the hot water supply passage c and is pivotally supported therein, and its base end is joined to one end of the wax thermoelement 3 within the hot water supply passage c. There is.

The wax thermoelement 3 has a temperature sensing part 30
is located in the hot water supply passage c, the other end side of the wax thermoelement 3 passes through a partition wall 29 between the hot water supply passage c and the accommodation chamber d of the adjustment screw 5, and is pivotally supported therein; The other end 31 and the adjusting screw 5 are in contact with each other. The adjustment screw 5 determines the position of the valve 40 and adjusts the distance between the front end of the valve 40 and the valve seat 41 and the rear end of the valve 40 and the valve seat in order to set the desired temperature of the hot water to be taken out. 42 and determine the desired ratio of the amount of water flowing through those gaps.

The thus constructed embodiment device operates as follows.

In FIG. 1, when a heat source is put into the heating pipe 13 and water is sent from the water tap to the water inlet 23, the water flows from the water supply passage a to the water outlet 21 and the water supply pipe 10.
The water is fed into the water boiler 1 through the heating pipe 13, where it is heated. The warmed hot water is sent to the hot water pipe 11, where it is mixed with the water fed through the bypass water supply passage d and the water supply pipe 14 to lower its temperature, and the mixed water inlet 22 of the valve box 20 is heated.
The water is supplied to the hot water faucet via the hot water supply passage c and the mixed water outlet 24. At this time, if the temperature of the hot water taken out from the hot water faucet is higher than the set temperature, the temperature sensing part 30 of the wax thermoelement 3 senses the hot water while it flows through the hot water supply passage c, and the wax By extending the thermo-element 3, the connecting rod 43 is moved toward the water supply passage a side against the bias of the spring 45, and the valve mechanism 4 is operated so that the valve 40 narrows the water supply passage a and widens the bypass water supply passage b. is operated to increase the amount of water distributed to the bypass water supply passage b, thereby lowering the temperature of the hot water taken out. Also,
If the temperature of the hot water you take out is lower than the set temperature,
The temperature of the hot water is measured by the temperature sensing section 3 in the hot water supply passage c.
0 senses this and contracts its wax thermoelement 3, and contrary to the above, the valve mechanism 4 operates and the hot water boiled in the water boiler 1 is supplied via the bypass water supply passage b. The amount of water being mixed decreases, increasing the temperature of the hot water being taken out. As a result, the temperature of the hot water to be taken out is automatically maintained at the desired temperature.

Next, FIG. 3 shows another embodiment.

This embodiment is fundamentally different from the structure of the first embodiment shown in FIGS. 1 and 2, and the same reference numerals are used to denote the same components and detailed explanations will be omitted. .

Therefore, in this embodiment, the second water outlet 25 of the first embodiment is omitted, and a bypass water supply passage b, which is branched from the water supply passage a in the valve box 20, is provided in the valve box 20. The bypass water supply passage b is connected to the water supply pipe 11 side of the water boiler 1 in a bypass manner from the mixed water inlet 22 connecting the water supply pipe 11. This is done inside the valve box 20 that spans the hot water supply passage c.

In the embodiment shown in FIG. 3, when the temperature of hot water taken out from the hot water faucet connected to the mixed water outlet 24 is higher than the temperature set as desired by the adjustment screw 5, the hot water that is taken out flows through the hot water supply. aisle c
By operating the wax thermoelement 3 in which the temperature sensing part 30 is located, the valve mechanism 4 operates to increase the amount of water flowing from the water supply passage a to the bypass water supply passage b. The amount of water flowing into the hot water supply passage c through the mixed water inlet 22 increases, and the amount of water mixed with the hot water taken out without passing through the boiler 1 increases, thereby lowering the temperature of the hot water taken out. Conversely, when the temperature of the hot water to be taken out falls below the desired temperature, the wax thermometer in which the temperature sensing part 30 is located in the hot water supply passage c through which the hot water to be taken out flows. The valve mechanism 4 opens the water supply passage a by the operation of the element 3.
By operating to reduce the amount of water flowing from the bypass water supply passage b to the bypass water supply passage b, the amount of water mixed with the hot water taken out via the hot water supply passage c is reduced, and the temperature of the hot water taken out is increased. The temperature of the hot water taken out by these operations is maintained at the desired temperature.

As explained above, the automatic hot water temperature control valve in the water heater according to the present invention has a water outlet 21 connected to the water supply pipe 10 side of the water heater 1 and a mixed water inlet connected to the hot water supply pipe 11 side of the water heater 1. 22
and a valve box 2 equipped with a water inlet 23 connected to the faucet side and a mixed water outlet 24 connected to the hot water faucet.
0, a water supply passage a is provided which communicates the water inlet 23 and the water outlet 21, and a bypass water supply passage b is branched from the water supply passage a to communicate with the water supply pipe 11 side of the hot water boiler 1 in a bypass manner. A hot water supply passage c is provided which communicates the mixed water inlet 22 and the mixed water outlet 24; A valve mechanism 4 is disposed to change and control the amount of water distributed to the hot water supply passage c, and the valve mechanism 4 is connected to the wax thermoelement 3, which has a temperature sensing section 30 disposed in the hot water supply passage c. Since it is configured so that it operates in the direction of increasing the amount of water distributed to the bypass water supply passage b side as the temperature rises in the section 30, it is possible to use a stop-off type, which was previously thought to be unable to adjust the temperature of the hot water taken out. To make it possible to freely take out hot water whose temperature is automatically controlled to a desired temperature from a water heater at any time. The automatic hot water temperature control valve in this water heater can also be easily installed in existing stop-off type water heaters.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a water heater equipped with a device according to the first embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the same device, and Fig. 3 is a schematic diagram of a water heater equipped with a device according to the second embodiment of the present invention. It is a schematic diagram. Explanation of drawing symbols, 1... water boiler, 10...
Water supply pipe, 11...Hot water pipe, 13...Heating pipe,
14...Water supply pipe, a...Water supply passage, b...Bypass water supply passage, c...Hot water supply passage, 2...Automatic hot water temperature control valve, 20...Valve box, 21...Water outlet,
22... Mixed water inlet, 23... Water inlet, 24...
Mixed water outlet, 25... Water outlet, 26... Partition wall, 2
7... Valve guide surface, 28/29... Partition wall, 3... Wax thermoelement, 30... Temperature sensing part, 31
...Other end, 4...Valve mechanism, 40...Valve, 41.4
2...Valve seat, 43...Connection rod, 44...O ring, 45...Spring, 5...Adjustment screw, d...Accommodation chamber.

Claims (1)

[Claims] 1 A water outlet 21 connected to the water supply pipe 10 side of the water heater 1, a mixed water inlet 22 connected to the hot water supply pipe 11 side of the water heater 1, a water inlet 23 connected to the faucet side, and a mixing water inlet connected to the hot water faucet. water outlet 2
4, the water inlet 23
A water supply passage a communicating with the water outlet 21 is provided, and a bypass water supply passage b is branched from the water supply passage a and communicated with the water supply pipe 11 side of the hot water boiler 1 in a bypass manner, and the mixed water A hot water supply passage c communicating the inlet 22 and the mixed water outlet 24 is provided, and the water to be distributed between the bypass water supply passage b and the water outlet 21 is provided on the water inlet 23 side of the water supply passage a than the bypass water supply passage b. A valve mechanism 4 for changing and controlling the amount of hot water is provided, and the valve mechanism 4 is connected to the temperature sensing portion 3 in the hot water supply passage c.
0 is connected to the wax thermoelement 3 in which the temperature sensor 30 is raised so as to operate in a direction to increase the amount of water distributed to the bypass water supply passage b side. Water temperature control valve.