JPH0224037Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application) The present invention relates to a water temperature regulating device for a water heater.

(Prior art and its problems) As this type of hot water temperature regulating device, the one shown in Fig. 7 is already known, and by rotating the operating knob, hot water can be drawn from high temperature to low temperature at will. .

Bypass circuit 10 in the gas circuit leading to the main burner 1
is provided to regulate the gas amount to a constant level when the bypass circuit 10 is closed, and on the other hand, a water flow control valve 3 is inserted into the water circuit 20 to the heat exchanger 2, and a water flow control valve 3 is inserted between the water flow control valve and the bypass circuit. The inserted opening/closing valve 4 is interlocked, and by rotating the operating knob 31, the amount of water and gas are changed, and the temperature of the hot water is changed.

However, this conventional device has the disadvantage that it is difficult to set the desired hot water temperature.

Although the opening degree of the water flow control valve 3 gradually changes depending on the rotation angle of the operating knob 31, the gas supply amount changes suddenly between the low temperature range and the high temperature range, and the hot water temperature in the low temperature range The degree of change is different from that in the high temperature range, and the amount of hot water and hot water temperature change as the operating knob 31 is rotated, as shown in FIG. This is because the degree of temperature change changes suddenly.

(Technical Issue) The present invention is designed to adjust the outlet hot water temperature by changing the amount of water supplied to the heat exchanger and the amount of gas supplied to the main burner. In order to make settings easier, the technical problem is to uniformly change from a high temperature range to a low temperature range according to the rotation of the operating knob.

(Technical Means) The technical means of the present invention taken to solve the above-mentioned technical problems are as follows. A gas pressure regulating valve 5 that maintains the secondary pressure at a set pressure is inserted into the gas circuit, and a water flow regulating valve 3 that continuously changes the amount of water supplied by operating the operating section is inserted into the water circuit 20. The operating part of the water flow control valve 3 is used as a hot water temperature control knob, and this hot water temperature control knob and the secondary pressure control means of the gas pressure control valve 5 are linked via a mover 6, and A slider 6 is interposed between the hot water temperature adjusting knob and the secondary pressure adjusting means so that the secondary pressure of the gas pressure regulating valve 5 changes continuously by operating the temperature adjusting knob. When the control knob is set to the maximum temperature, the water supply amount is at the minimum value and the secondary pressure of the gas pressure adjustment valve 5 is at the maximum value, and conversely, when the control knob is set to the lowest temperature, the water supply amount is at the maximum value and the gas pressure is adjusted. The interlocking relationship between the mover 6 and its corresponding portion is set so that the secondary pressure of the valve 5 is at a minimum value. (See Figure 1) (Operation) The above technical means of the present invention operates as follows.

When the operating section of the water flow control valve 3, that is, the hot water temperature control knob is operated to change the set temperature from a high temperature range to a low temperature range, the opening degree of the water flow control valve 3 gradually increases from the minimum opening degree. At this time, the mover 6 interlocked with the hot water temperature adjustment knob operates the secondary pressure adjustment means of the gas pressure adjustment valve 5, and the secondary pressure of the gas pressure adjustment valve 5 continuously decreases in response to the operation. do. Conversely, if you operate to increase the set temperature, the water flow control valve 3
The opening degree of the gas pressure regulating valve 5 gradually decreases, and the secondary pressure of the gas pressure regulating valve 5 continuously increases.

Therefore, by operating the hot water temperature control knob, the relationship between the amount of water supplied to the heat exchanger and the amount of combustion gas changes continuously in the range from maximum water amount: minimum amount of combustion gas to minimum amount of water: maximum amount of combustion gas. I will do it.

Note that, since the gas pressure regulating valve 5 maintains the secondary pressure at the set pressure regardless of fluctuations in the primary pressure, the effect of stabilizing the secondary pressure is maintained as is.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

By operating the operating section, the temperature of the hot water at the outlet can be changed continuously from a high temperature range to a low temperature range, so unlike in the past, the degree of temperature change does not suddenly change at a specific operating position, and the temperature of the hot water at the outlet can be changed continuously. It becomes easier to set in that range.

Furthermore, since the hot water temperature is regulated (set) by adjusting the secondary pressure of the gas pressure regulating valve, there is no variation in the set temperature due to fluctuations in gas pressure.

Furthermore, since the amount of gas supplied to the burner is gradually changed, the temperature range that can be set is the same, compared to the conventional method that restricts the amount of gas supplied to the burner at a certain point. Under certain conditions, the amount of hot water in the intermediate range can be set large. This is because, according to the above configuration of the present invention, the amount of hot water and the temperature of hot water change as shown in FIG.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 3 to 6.

In this embodiment, the water flow control valve 3 has a structure in which a rotary valve 32 as shown in FIGS. A passage hole 33 is formed, and when the operation knob 31 as an operation part is rotated, the opening area of the passage hole 33 corresponding to the mouth of the valve body 30 gradually changes, and the flow rate is adjusted. can.

The operating shaft 34 of the water flow control valve 3 is provided with a gear 61 as shown in FIG.
2, it is interlocked with the secondary pressure regulating means of the gas pressure regulating valve 5.

The gas pressure regulating valve 5 is configured such that when the primary pressure applied to the diaphragm 52 changes due to the biasing force of the secondary pressure setting spring 51, the opening degree of the valve body 53 changes to keep the secondary pressure constant. A spring retainer 54 is placed in contact with the free end of the secondary pressure setting spring 51.
is held so as to be slidable in the axial direction of this spring, and this spring holder functions as the secondary pressure adjusting means described above.

Further, the actuator 62 is in contact with a cam portion 63 provided on the rack 60, and due to the mutual pairing of the gear 61 → the rack 60 → the cam portion 63 → the actuator 62 → the spring holder 54, the gas amount changes as described above.
That is, by changing the operating section from the high temperature setting range to the low temperature setting range, the secondary pressure supplied to the burner continuously decreases, and the gas amount changes continuously.

Note that the shape of the cam portion 63 may be curved in addition to the linear shape shown in the figure.

Next, in the second embodiment shown in FIG. 6, a spring holder 54 as a secondary pressure adjusting means is screwed into the main body of the gas pressure regulating valve 5, and the operating shaft 34 and the shaft part 55 of the spring holder are connected. They are interlocked at a predetermined ratio,
In this case, the shaft portion 5
5 rotates, the spring presser 54 is pushed in or loosened, and the secondary pressure is adjusted.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the principle of the present invention, Figure 2 is a graph showing changes in the set water temperature in the case of the present invention, and Figure 3 is the water flow control valve 3 used in the first embodiment of the present invention.
4 is a developed view of the rotary valve, FIG. 5 is an explanatory diagram showing the relationship between the operating shaft of the rotary valve and the gas pressure regulating valve, and FIG. 6 is a main part of the second embodiment. 7 and 8 are explanatory diagrams of conventional examples, and in the figures 3... water flow control valve, 5... gas pressure regulation valve,
...Spring presser, 6...Movement element.

Claims (1)

[Scope of utility model registration request] The outlet temperature is adjusted by changing the amount of water supplied to the heat exchanger and the amount of gas supplied to the main burner. A gas pressure regulating valve 5 of a type that maintains the secondary pressure at a set pressure regardless of pressure fluctuations is inserted into the gas circuit, and a water flow regulating valve 3 that continuously changes the amount of water supplied by operating the operating section. is inserted into the water circuit 20 , the operating part of the water flow control valve 3 is used as a hot water temperature control knob, and the hot water temperature control knob and the secondary pressure control means of the gas pressure control valve 5 are connected via a slider 6 . A slider 6 is placed between the hot water temperature adjusting knob and the secondary pressure adjusting means so that the secondary pressure of the gas pressure adjusting valve 5 changes continuously by operating the hot water temperature adjusting knob. When the hot water temperature control knob is set to the maximum temperature, the water supply amount is the minimum value and the secondary pressure of the gas pressure regulating valve 5 is the maximum value, and conversely, when the water temperature adjustment knob is set to the minimum temperature, the water supply amount is the maximum value. A hot water temperature regulating device for a water heater, in which the interlocking relationship between the mover 6 and its corresponding part is set so that the secondary pressure of the gas pressure regulating valve 5 becomes the minimum value.