JPH0354244B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to a capacity adjustment device for a water heater equipped with a hot water temperature adjustment device, and is capable of widening the adjustment range of the amount of hot water and the temperature of the hot water. This is to prevent wasteful consumption of.

(Prior art and its problems) There is already a water temperature regulating device for a gas water heater disclosed in Japanese Utility Model Publication No. 58-25214.

In this conventional system, as shown in FIG. 13, the gas circuit 1 is provided with a gas amount control valve 11, and the water circuit 2 is also provided with a water amount control valve 21, and both of these control valves are connected in a certain interlocking relationship by an interlocking mechanism A. It was placed in

In this conventional system, the interlocking relationship is set so that it can be changed from a large water volume/small gas volume state to a small water volume/large gas volume state, and under the former setting condition, a large amount of low-temperature hot water is drawn. Under the latter setting, a small amount of high-temperature hot water is drawn out, and the water temperature can be adjusted during this time. In this case, the range of hot water temperature adjustment is wider than that of a type that only adjusts the amount of water.

On the other hand, some gas water heaters are designed to switch the combustion capacity of the burner between summer and winter, and this capacity switching device controls the flow rate of the gas circuit using a throttle valve inserted into the gas circuit. It is designed so that it can be switched between a large flow state and a small flow state.

When this capacity switching device C and the hot water temperature adjusting device B are combined as shown in FIG. 14, the hot water temperature and amount can be adjusted over a wide range by operating both devices.

However, in this case, the hot water temperature adjustment curve by hot water temperature adjustment device B when the capacity switching device C is in the maximum flow state and the hot water temperature adjustment curve when it is in other flow states are curves with the same slope. No. As shown in FIG. 15, the amount of change in hot water temperature with respect to the operation amount of the operating knob of hot water temperature adjusting device B is different between the high capacity state and the small capacity state.

This is because the throttling efficiency of the gas amount control valve 11 of the hot water temperature control device B is different between the large capacity state and the small capacity state.

(Technical Problem) The present invention provides a hot water temperature control device B in which the gas flow control valve 11 inserted into the gas circuit 1 and the water flow control valve 21 inserted into the water circuit 2 are interlocked by an interlocking mechanism A. In order to make the degree of change in hot water temperature by the hot water temperature control device the same in any capacity state when the combustion capacity is made variable and the capacity can be adjusted in the equipped water heater, the gas amount control valve 11 is used. The technical problem is to ensure that the throttling efficiency does not change due to capacity adjustment.

(Technical Means) The technical means of the present invention taken to solve the above technical problem is a flow rate regulating circuit 10 in which the gas amount regulating valve 11 is inserted into the gas circuit gas circuit 1.
A, and a constant flow circuit 10b that bypasses the constant flow rate circuit 10b, and the operation unit 4 of the capacity adjustment means for opening and closing the flow rate adjustment circuit 10a or putting it in a throttle state is independent from the operation of the hot water temperature adjustment device B. This made it possible to operate the system.

(Operation) The above technical means of the present invention operates as follows.

The gas circuit 1 is provided with a constant flow rate circuit 10b, and the gas flow control valve 11 and the capacity adjustment means 3 connected in series therewith are inserted into a flow rate control circuit 10a that is separate from the constant flow rate circuit 10b.

Further, the capacity adjustment means 3 has an operation section 4 that can be operated independently of the operation section of the hot water temperature adjustment device B.

Therefore, the capacity adjusting means 3 can be adjusted by operating the operating section 4.
When set to the maximum throttle state (minimum flow rate state), regardless of the throttle state of the gas amount control valve 11, the flow rate control circuit 10a and the constant flow rate circuit 1
0b becomes a preset constant flow rate.
That is, in the minimum capacity state, the gas amount in the gas circuit 1 is constant, and in this state, the flow rate in the water circuit 2 changes at the same rate as in the maximum capacity state according to the operation amount of the hot water temperature regulator B. do.

If we look at the above action graphically, we can see that water temperature regulator B
When the horizontal axis represents the amount of operation of the operating knob, the change in gas amount due to the amount of gas is set as shown in E in FIG. 2.

On the other hand, the flow rate of the water circuit 2 is set so as to show the change of F in the figure.

In the minimum capacity state, the gas amount does not change and takes a constant value, and since this value is set to be equal to or less than the minimum value of the gas amount change, it changes as shown in e in the figure. Therefore, the hot water temperature changes along the line G in the maximum capacity state, and changes along the line g in the minimum capacity state, and the degree of change in the hot water temperature with respect to the manipulated variable is the same in each of the above states, except for the horizontal portion. are the same.

This is because the degree of change in the amount of water relative to the amount of gas is the same in any of the above states.

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

Even when switching to the minimum capacity state, the change in hot water temperature due to a change in the operating amount of the hot water temperature regulating device is the same as that in the maximum capacity state, making it easy to set the hot water temperature.

(Example) The example shown in FIGS. 3 to 12 will be described below.

The first embodiment shown in FIG. 3 corresponds to the embodiment of claim 2, in which an orifice 12 is inserted into a constant flow circuit 10b to set the flow rate of this circuit to a predetermined value. The flow rate adjustment circuit 10a is branched from the insertion part of the gas amount adjustment valve 11, and the on-off valve 3a is inserted into this circuit, and the burner 10
These gas circuits are merged on the upstream side.

The valve shaft 31 of the on-off valve 3a protrudes outside and has an operating section 4 attached to its tip, and as an operating mechanism section, a leaf spring 41 that can be reversed into two states is interposed between the valve shaft 31 and a fixed wall. It has a fully equipped configuration.

In this device, when the operation part 4 is pressed, the on-off valve 3
a, the valve shaft 31 and the leaf spring 41 are in the state shown by the solid line in the figure, the on-off valve 3a shuts off the flow rate adjustment circuit 10a, the capacity of the gas water heater is set to the small capacity state (minimum flow state), and the gas Regardless of the throttle state of the amount control valve 11, the amount of gas set by the constant flow circuit 10b is supplied to the burner 10. On the other hand, as shown in the figure, the water flow control valve 21 has a structure in which the degree of opening changes according to the rotation angle of the rotary valve, and the shape of the passage hole formed in the rotary valve is By specifying it, it is set to change like the F line in FIG. In other words, in the rotation angle range from zero point to point P, the flow rate is set to the maximum flow rate _Q3 , and in the area where the manipulated variable is larger than point P, the manipulated variable The opening degree is set so that as the value increases, the opening degree decreases.

Therefore, in this case, under the condition that the amount of heating by the burner 10 is constant, the amount of water will change as described above according to the amount of operation of the operation knob, and the temperature of the hot water will be as shown in line G in Figure 2. Make a change.

Next, pull the operating part 4 to open the on-off valve 3a. In this state, the amount of gas supplied to the gas burner 10 is the sum of the amount of gas set by the gas amount control valve 11 to the amount of gas passing through the constant flow circuit 10b. Since the amount is set to a predetermined value depending on the diameter of the nozzle (not shown) that corresponds to the capacity of this gas burner, the additional gas amount is equal to this set value.
When Q ₂ is reached, the amount of gas supplied to the gas burner 10 does not change even if the opening degree of the gas amount control valve 11 becomes larger than that.

In this embodiment, the degree of change in the amount of gas and the amount of water changes when the amount of operation of the operating knob reaches point P in FIG. 2 by means of an interlocking operation mechanism, which will be described later. In other words, from the operation amount zero point to the P point, the water amount is maintained at the maximum flow rate _Q3 , and the gas amount changes between the minimum gas amount _Q1 and the maximum gas amount _Q2 ,
When the manipulated variable exceeds point P, the amount of water gradually decreases according to the manipulated variable, but the amount of gas supplied to the gas burner 10 remains at the set value _Q2 .

As a result, the hot water temperature shows the change of line G in FIG.

Through the above, the initial objective will be achieved.

In addition, in this embodiment, as the hot water temperature adjustment device B,
A needle valve-type gas flow control valve 11 and a rotary valve-type water flow control valve 21 are adopted, and pinions 5 provided in these gas flow control valves 11 and water flow control valves 21 are used.
2 and 53 are interlocked by a rack 51.

Next, the second embodiment shown in FIG. 4 corresponds to the embodiment of claim 3,
The capacity adjustment means 3 is a throttle valve 3b,
This operating mechanism employs a configuration in which a cam 42 is brought into contact with the tip of the valve shaft 31.

In this device, when the throttle valve 3b is in the maximum throttle state (the flow rate of the flow rate adjustment circuit 10a is the minimum state), the second
The water temperature can be adjusted by changing g in the diagram.

Furthermore, in this case, the amount of gas passing through the flow rate adjustment circuit 10a can be adjusted according to the amount of rotation of the cam 42 even in a range that does not reach the maximum throttle state. It is possible to adjust the water temperature. That is, the hot water temperature can be adjusted within the range shown in FIG. 5 by operating the hot water temperature adjusting device B and the operating section 4.

Next, in the third embodiment shown in FIG. 6, the interlocking mechanism A of the hot water temperature regulating device B is a combination of levers 54, 55 and a slide rod 56, and the gas amount regulating valve 1
1. Both the water flow control valve 21 and the lever 54,
55, and corresponds to the embodiment of claim 4.

In this device, a push button 43 is used to push a lever 54 interlocked with the gas amount control valve 11 by a predetermined amount.
is the operation section 4, and a known one is adopted as the operation mechanism section 40 of this push button. For example, there is a well-known mechanism in which the output shaft 44 of the push button 43 is set to be pushed a certain amount by the first push operation, and the output shaft 44 returns to the initial position by the second push operation. Can be adopted.

Therefore, in this embodiment, the first push operation of the push button 43 causes a small capacity state, and the second
The second press will return it to its high capacity state. Further, in this case, the operating amount of the output shaft 44 is set so that when the push button 43 is pushed in, the gas amount control valve 11 is set to the maximum throttle state (minimum flow state). Therefore, in this embodiment, the gas amount control valve 11 also functions as the capacity adjustment means 3.

Here, the flow rate of the flow rate control circuit 10a and the constant flow rate circuit 10 in the maximum throttle state of the gas amount control valve 11 are expressed as follows.
The sum of the flow rate b and the flow rate is set to the gas amount shown by e in FIG.

The fourth embodiment shown in FIG. 7 is a partial modification of the third embodiment, in which the operating mechanism section 40 that is operated by the operating section 4 is
In this case, as the cam 45 rotates,
The gas amount regulating valve 11 can be adjusted steplessly to the maximum throttle state independently of the operation of the hot water temperature regulating device B, making it possible to regulate the hot water temperature as shown in FIG.

In the fifth embodiment shown in FIGS. 8 and 9, the gas amount control valve 11 is used as the capacity adjustment means 3, and a constant flow circuit 10b is provided in the gas amount control valve 11, which is disclosed in the patent. This corresponds to the embodiment of claim 5.

Note that the operating section 4 and the operating mechanism section 40 are configured the same as those of the third embodiment or the fourth embodiment,
The one in Figure 8 is like Figure 2, and the one in Figure 9 is like Figure 5.
You can adjust the water temperature as shown in the picture.

As a modification of this embodiment, as shown in FIG. 10, the constant flow circuit 10b may be a groove 13 provided on the outer periphery of the gas amount control valve 11, and in this case, the same steps as in the above embodiment can be made. functions.

The embodiment shown in FIGS. 11 and 12 is implemented in a water heater equipped with a hot water temperature control device B that employs a governor-type gas flow control valve 11 and a water flow control valve 21. 62 valve bodies 60 are inserted into the flow rate adjustment circuit 10a and the water circuit 2, so that the biasing force of the secondary pressure adjustment spring 63 of each governor is changed in an interlocked manner by the slide rod 56 via the levers 54 and 55. This is what I did.

In the one in FIG. 11, the configuration of the capacity adjustment means 3,
Furthermore, the structure of the operating section 4 and operating mechanism section 40 of this device is the same as that of the first embodiment, and the structure of FIG. 12 is the same as that of the second embodiment. The example functions similarly to the corresponding previous embodiment.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the principle of the present invention, FIG. 2 is a graph showing an example of changes in hot water temperature, gas amount, and hot water amount according to the present invention, FIG. 3 is an explanatory diagram of the first embodiment, and FIG. Fig. 4 is an explanatory diagram of the main parts of the second embodiment, Fig. 5 is a graph showing changes in hot water temperature, gas amount, and quantity of hot water in this case, Fig. 6 is an explanatory diagram of the third embodiment, and Fig. 7 is a graph showing changes in hot water temperature, gas amount, and hot water amount in this case. 4
An explanatory diagram of the embodiment, FIGS. 8 and 9 are explanatory diagrams of the fifth embodiment, FIG. 10 is an explanatory diagram of the main part of a modification of the fifth embodiment, and FIGS. 11 and 12 are governor type FIG. 13 and FIG. 14 are explanatory diagrams of the conventional example, and FIG. 15 is an explanatory diagram showing changes in hot water temperature in the case of FIG.
In the figure, 1... Gas circuit, 10... Burner, 10a...
Flow rate adjustment circuit, 10b...constant flow circuit, 2...water circuit, 21...water flow rate adjustment valve, 3...capacity adjustment means, 3a...on/off valve, 3b...throttle valve, 4...operation unit, 40 ...Operation mechanism section.

Claims (1)

[Claims] 1. The water flow control valve 21 inserted into the water circuit 2 and the gas flow control valve 11 inserted into the gas circuit 1 are connected by an interlocking mechanism A.
The gas circuit 1 is equipped with a flow rate adjustment circuit 10a into which the gas amount adjustment valve 11 is inserted, and a constant flow rate circuit 10b that bypasses the flow rate adjustment circuit 10a, This is a capacity adjustment device for a gas water heater, in which the operation unit 4 of the capacity adjustment means for opening/closing or throttling the flow rate adjustment circuit 10a can be operated independently from the operation of the hot water temperature adjustment device B. 2. The capacity adjustment device for a gas water heater according to claim 1, wherein the capacity adjustment means 3 is an on-off valve 3a that opens and closes the flow rate adjustment circuit 10a. 3. The capacity adjusting device for a gas water heater according to claim 1, wherein the capacity adjusting means 3 is a throttle valve 3b. 4. Scope of Claims: The operating section of the operating mechanism for operating the gas amount regulating valve 11 independently from the interlocking mechanism A of the hot water temperature regulating device B is the operating section 4, and the gas amount regulating valve 11 is the capacity regulating means 3. 2. The capacity adjustment device for a gas water heater according to item 1. 5. The capacity adjustment device for a gas water heater according to claim 4, wherein the constant flow rate circuit 10b is provided in the gas amount adjustment valve 11.