JPH0351968B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hot water temperature regulating device in a gas water heater.

(Prior Art) A gas water heater is equipped with a heat exchanger and a gas burner that heats the heat exchanger, and a water flow rate adjusting member is provided in the water passage leading to the heat exchanger, and a gas flow rate adjustment member is provided in the gas passage leading to the gas burner. A member is provided, and the water amount adjusting member and the gas amount adjusting member are configured such that when the water amount adjusting member is adjusted to the side where the water amount is increased, the capacity of the gas burner is adjusted by the gas amount adjusting member to the side where the capacity of the gas burner is decreased. is known, for example, from Japanese Utility Model Publication No. 58-25214.

(Problem to be solved by the invention) However, in this method, as the water volume decreases, the water temperature is adjusted by gradually increasing the gas volume. This has the disadvantage of wasting water.

(Means for Solving the Problems) A gas water heater is provided for solving the problems of the present invention, which includes a heat exchanger and a gas burner for heating the heat exchanger. A water volume adjustment member is provided in the water passage leading to the gas burner, and a gas volume adjustment member is provided in the gas passage leading to the gas burner, and the water volume adjustment member and the gas volume adjustment member are adjusted to increase the water volume of the water volume adjustment member. According to the above, in the case where the capacity of the gas burner is adjusted to decrease by the gas regulating member, the water passage is connected to the main water passage and a bypass bypassing the main water passage on the downstream side of the water amount regulating member. The main water passage is provided with a constriction portion that throttles the water flow to a water flow rate below the minimum water flow rate controlled by the water flow rate adjustment member, and the gas passage is provided with
A main gas passage with the gas amount adjusting member interposed therebetween and a bypass passage bypassing the main gas passage are provided, and on-off valves are provided to open and close each of the bypass passages, so that when one on-off valve closes, the other valve closes. They are linked together as if they were closed.

(Function) When closing the bypass passage that bypasses the main gas passage with the on-off valve interposed in the gas passage, and closing the bypass passage with the on-off valve interposed with the water passage, the throttle section placed in the main water passage must be closed. The amount of water passing through is less than or equal to the minimum adjustment amount by the water amount adjustment member,
Since it is not affected by the water volume adjustment member, the water volume is a constant small water volume set by the throttle section interposed in the main gas passage shown as A in Figures 2 to 4, and the gas volume is controlled by the main gas passage. The gas amount can be varied from a small gas amount to a large gas amount as shown by b in the figure in accordance with the adjustment of the gas amount adjusting member interposed in the gas amount adjusting member.

Therefore, the water temperature can be adjusted from low to high temperatures with a small amount of water.

In addition, when opening the bypass passage that bypasses the main gas passage by using the on-off valve interposed in the gas passage, and when opening the bypass passage using the on-off valve interposed in the water passage, the amount of water is as shown in a in Figures 2 to 4. As shown, the amount of water varies from a small amount to a large amount according to the adjustment of the water amount adjustment member, and the amount of gas is a nearly constant amount determined by the bypass path and the main gas passage, so that a small amount of water can cause a high temperature and a large amount of water. You can also get hot water that is normally used at a low temperature.

That is, according to this, there is an advantage that a small amount of water and low temperature hot water can be obtained, which cannot be obtained with a conventional gas water heater.

(Example) An example of implementing the present invention will be described with reference to the attached drawings.
In the drawing, 1 is a water heater equipped with a heat exchanger 2 and a gas burner 3 for heating the same, 4 is a water passage connected to the heat exchanger 2, and 5 is a gas passage connected to the gas burner 3. is provided with a gas amount adjusting member 6, and the water passage 4 is provided with a water amount adjusting member 7, and both adjusting members 6, 7 are adjusted to increase the water amount by adjusting the water amount adjusting member 7. 6, the water volume adjustment member 7 is operated in a manner that the gas volume is throttled, and the configuration up to now is not particularly different from that known in the past. The gas amount adjusting member 6 is a tapered valve that adjusts the amount of gas flowing through the gas passage 5 by moving forward and backward with respect to the valve seat 6a. 8 cannot be rotated, but is movable in the axial direction, and the gas amount adjusting member 6 is provided with a threaded portion 11.
is provided, and the threaded portion 11 is screwed into a pinion 10 that meshes with the rack 9, and the water amount adjusting member 7 has a pinion 10 that is integrally provided thereon meshed with the rack 9, and the rack 9 is provided thereon. Operation knob 12
By sliding the adjustment members 6 and 7, the adjustment members 6 and 7 are interlocked as described above.

In such a device, the water passage 4 is connected to a main water passage 4a and a bypass passage 4b that bypasses the main water passage 4a on the downstream side of the water amount adjusting member 7 of the water passage 4.
The main water passage 4a is provided with a constriction part 13 that throttles the amount of water flowing below the minimum amount of water that can be adjusted by the water amount adjustment member 7, and the gas amount adjustment member 6 is interposed in the gas passage 5. An on-off valve 1 that is provided with a main gas passage 5 and a bypass passage 5b that bypasses the main gas passage 5, and that opens and closes each of the bypass passages 4b and 5b, respectively.
4 and 15 are provided, and both on-off valves 14 and 15 are linked so that when one on-off valve 14 closes, the other on-off valve 15 is also closed. On-off valves 14 and 15 are provided,
Both bypass paths 4b and 5b are closed when the operator 16 is pressed to the ON position, and both bypass paths 4b and 5b are opened when the operator is pulled back to the OFF position.

The amount of water flowing through the throttle part 13 is as shown in Figures 2 to 4.
As shown in the figure, the minimum adjustment amount of the water amount adjustment member 7 is set to be slightly less than or equal to the minimum adjustment amount. The total amount of gas flowing through the bypass passage 5b and the main passage 5a is preferably equal to or greater than the maximum gas amount set in the gas amount adjusting member 6.

Furthermore, if the rate of change of the gas amount and water amount by both adjusting members 6 and 7 is different, the temperature characteristics will be different when the operator 16 is turned on and when it is turned off, as shown by C ₁ and C ₂ in Fig. 2. However, when they are made equal, the temperature characteristics when the operator 16 is turned on and when it is turned off become the same, as shown by C in FIGS. 3 and 4, making it easier to display the temperature, etc. The capacity of the gas burner can be changed by using the gas adjustment member, in addition to restricting the gas amount adjustment member 6 provided in the main gas passage 5a described above, the capacity of the gas burner can be changed by adjusting the capacity of the gas burner from the downstream side of the main gas passage 5a (not shown). It is also possible to provide an on-off valve provided in the gas passage as the gas adjustment member and open and close it as appropriate.

(Effects of the Invention) According to the present invention, the water passage is branched into a main water passage and a bypass passage that bypasses the main water passage on the downstream side of the water amount adjusting member, and the water passage is divided into a main water passage and a bypass passage that bypasses the main water passage. A constriction part is provided to reduce the flow of water to a water flow rate below a minimum water flow rate controlled by the water flow rate adjustment member, and the gas passage includes a main gas passage in which the gas flow rate adjustment member is interposed, and a bypass passage that bypasses the main gas passage, and each An on-off valve is provided to open and close each bypass path,
Both on-off valves are linked so that when one on-off valve closes, the other valve also closes, so when the on-off valves are opened and closed, the hot water will change from the normal high temperature with a small amount of water, to the low temperature with a large amount of water, and the hot water with a small amount of water and high temperature. It is possible to obtain hot water from a low temperature to a low temperature, and as a result, it is possible to obtain hot water at a low temperature with a small amount of water that could not be obtained conventionally, and it has the effect of eliminating wasteful use of water compared to conventional water heaters. .

[Brief explanation of drawings]

FIG. 1 is a cutaway side view showing one example of implementing the present invention;
2 to 4 are characteristic diagrams thereof. 1...Water boiler, 2...Heat exchanger, 3...Gas burner, 4...Water passage, 5...Gas passage, 6...Gas amount adjustment member, 7...Water amount adjustment member, 13...Aperture Part, 4a...main water passage, 4b...bypass path,
5a...main gas passage, 5b...bypass passage.

Claims (1)

[Claims] 1 A gas water heater equipped with a heat exchanger and a gas burner for heating the heat exchanger, in which a water flow regulating member is provided in a water passage leading to the heat exchanger, and a gas flow regulating member is provided in a gas passage leading to the gas burner. , and the water amount adjusting member and the gas amount adjusting member are configured such that when the water amount adjusting member is adjusted to the side where the water amount is increased, the capacity of the gas burner is adjusted to the side where the gas burner capacity is decreased by the gas adjusting member, The water passage is branched into a main water passage and a bypass passage that bypasses the main water passage on the downstream side of the water quantity adjustment member, and the water flow in the main water passage is adjusted to a water flow rate that is less than the minimum water flow rate controlled by the water quantity adjustment member. The gas passage is provided with a gas passage in which the gas amount adjusting member is interposed and a bypass passage that bypasses the gas passage, and an on-off valve that opens and closes each bypass passage is provided, and a double on-off valve is provided. A hot water temperature regulating device for a gas water heater, which operates in such a way that when one on-off valve closes, the other on-off valve also closes.