JPH023078Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hot water outlet temperature control device for a gas instantaneous water heater.

(Prior Art) The applicant of the present application has previously developed a water heater of this type that is equipped with a push-button button on the front of the water heater body, which has a heat exchanger inside and a burner unit facing the heat exchanger. When the pushbutton is pressed for the first time, the gas valve in the gas passage connected to the burner unit and the water in the water passage connected to the heat exchanger are activated via a pair of operating rods that respond to this. In a type in which a valve is opened to obtain a predetermined amount of hot water, a temperature adjusting member is movably provided on the front surface of the hot water which is connected to a control member consisting of a water flow control member and a gas flow control member that control the temperature of hot water. We have proposed a system in which the temperature of the tapped water can be adjusted freely within a predetermined range.

In this device, the rise in the temperature of the hot water discharged relative to the water supply temperature can be adjusted over a wide range from low to high temperatures in accordance with the amount of hot water discharged, as shown by the P curve in FIG. 7, by operating the temperature control member.

(Problem to be solved by the invention) However, the above proposal has the disadvantage that when the temperature control member is adjusted to the high temperature side, the temperature of the hot water suddenly changes with the slightest movement, causing discomfort to the user. . In addition, the temperature rise of hot water relative to the supplied water for a given amount of hot water is constant even when the season changes, so when the season changes, the temperature of hot water for a given amount of hot water (per unit time, the same applies hereinafter) changes, so it is always constant. In order to obtain hot water at a certain temperature, the amount of hot water must be changed, which is inconvenient for use. It is an object of the present invention to provide a device that eliminates such inconveniences and is convenient in that the temperature of hot water can be adjusted with a slight change in the amount of hot water dispensed by adjusting the temperature control member to the low temperature side. This is the purpose.

(Means for Solving the Problems) The present invention includes a water flow control member and a gas flow control member that control the hot water temperature, and both members reduce or increase the gas flow in response to an increase or decrease in the hot water flow. In an instantaneous water heater that is interlocked so that the temperature rise of hot water is higher than a set value, the interlock between the two members is released, and only the water flow control member is made adjustable, and the set value is also adjustable. It is characterized by comprising a gas amount control member.

(Example) The invention will now be described with reference to illustrated embodiments.

The burner unit 2 facing the heat exchanger 1 is composed of a main burner 2a and a starter burner 2b, and the gas passage 3 is connected downstream to the main burner 2a.
The main gas passage 3a connected to the pilot burner 2
The pilot burner 2b is provided with an ignition electrode 6 which responds to an ignition switch 5 which is closed when the operating rod 4 is actuated.
In addition, the main gas passage 3a is interposed with a water pressure responsive valve 8 that opens when water flows to the heat exchanger 1 when the water valve 7 is opened, and the gas valve 9 , a gas on-off valve 9a on the downstream side that is pushed open by the operating rod 4, and a gas safety valve 9b on the upstream side that is opened when pushed via the on-off valve 9a. Furthermore, in the illustrated embodiment, a pressure lever 10 is provided on the front surface of the water valve 7 to open the water valve 7, and a pressure lever 10 is provided on the operating rod 11 corresponding to the water valve 7.
1, the water valve 7 is provided with a ratchet 12 that engages with the lever 10 when the water valve 7 is swung to the rearward end position, and thus the water valve 7 does not open when the push button 13 is operated by the pushbutton, but the water valve 7 does not open with the pushbutton 13. I made it open with the release. That is, when the push button is operated, the gas valve 9 is sequentially opened at the press, and then the water valve 7 is opened at the release. Further, the control member 14 includes a water amount control member 14a on the water passage 15 side and a gas amount control member 14b on the gas passage 3 side.
b consists of a valve rod 14b ₁ and a cam plate 14b ₂ which is pushed and rotated by the tip of the valve rod 14b 1. A temperature adjusting member 16 connected to the control member 14 is supported on a horizontal guide shaft 17 so as to be slidable left and right, and is freely guided to a high temperature side on the right side and a low temperature side on the left side, and a low temperature side on the left side. When guided to the side, the protrusion 18 provided on the left end of the cusp plate 1
The water amount control member 14 reduces the gas amount through the valve rod 14b ₁ which rotates 4b ₂ and slides thereby.
The cam plate _14b2 follows the protrusion 18 and rotates in the opposite direction, thereby causing the valve to slide in the opposite direction. The amount of gas was increased through the rod _14b1 , and the amount of hot water dispensed was decreased by operating the water amount control member 14a. Furthermore, a connecting member 19 is provided between the operating rod 4 and the push button 13, which is normally in the operating position and connects both 4 and 13 to each other, and the connecting member 19 is connected to a predetermined range of the control member 16. When it moves to the low temperature side beyond this point, it is pushed by this and can move freely to the inoperative position. This will be explained in detail with reference to the figures shown, for example, as shown in FIGS. 2 to 4. That is, the connecting member 19 is a shutter member 19a on the back side of the push button 13 that opens and closes a transparent window 13b on the front side of the operating rod 4, which is formed on a press plate 13a that is tiltable back and forth.
This is supported by an intermediate shaft 19b so as to be tiltable left and right, and its top is connected to the guide shaft 1.
A pin 19e and a pin groove 19f are attached to a sliding member 19d that is slidably and rotatably fitted to the upper end of the adjusting member 16 and is slidable outwardly against the spring 19c. Thus, the member 19 is normally in the operating position as shown in the second figure, that is, the transparent window 13b is in the closed position, and in this state, the push button 13 is pressed. In the non-operating position as shown in FIG. 4, that is, in the position where the transparent window 13b is opened, the operating rod 4 is activated by being pushed by the operating rod 4. is arranged so that it only protrudes into the through hole 13b and is not operated.
That is, in its operating position, the connecting member 19 connects both 4,
13 are interconnected, but are uncoupled in their inactive position.

Furthermore, in the illustrated example, the shutter member 19a is provided with a tongue piece 19g that extends rearward and a stopper 19h that cooperates with the tongue piece 19g on the side thereof, and the press plate 13a is placed in a rearward tilted position when the push button 13 is pushed. In this case, the tongue piece 19g and the stopper 19h are in an operating state where they overlap each other, and in this state, the shutter member 19a is stopped by the stopper 19h and is prevented from unintentionally swinging between the operating position and the non-operating position. I tried not to give any movement.

The above is not particularly different from what was proposed earlier, but
According to the present invention, as described above, both the members 14
A gas amount adjusting member 20 is provided which allows only the water amount controlling member 14a to be freely operated by releasing the interlocking of the water amount controlling member 14a and 14b, and also allows the set value to be adjusted.

As shown in FIGS. 1 and 5, the gas amount adjusting member 20 is connected to a pin 2 embedded in the cam plate 14b ₂
0a, and a gas amount adjusting lever 20b which has a through hole 21 into which the pin _20a fits and is pivoted at one end. The temperature adjusting member 16 is pressed against the spring 22 and prevented from rotating.
When the cam plate 14b2 is guided to the high temperature side on the right side, the engagement between the cam plate _14b2 and the protrusion 18 is released, and the water flow control member 14a
The interlock between the gas flow control member 14b and the water flow control member 14b is released, so that only the water flow control member 14a is adjusted by the temperature adjustment member 16, and when the lever 20b is rotated to the left and right, both the water flow control members 14a and 14b are adjusted. The position at which the interlock is released, that is, the set value for the temperature rise of the hot water, can be adjusted freely. Furthermore, no matter which position the lever 20b is in due to its rotation, it is ensured that it will not be rotated not only by movement of the temperature adjustment member 16 within a predetermined range but also by movement beyond the range to the low temperature side. Next, the size of the through hole 21 into which the pin 20a is inserted is determined.

Next, to explain the overall operation, when using the push button 3, the gas valve 9 is first opened and gas is introduced into the burner unit 2 through its pilot burner 2b. This is ignited, and then the water valve 7 is opened to allow water to flow through the heat exchanger 1, and the burner unit 2 is connected to its main burner 2a.
The gas is introduced into the heat exchanger 1 and ignited, and water is heated by the main burner 2a in the heat exchanger 1, thereby producing hot water. Further, during such an operation, by moving the adjusting member 16 left and right within a predetermined range, the temperature of the tapped water can be adjusted between low and high temperatures accordingly. If the adjusting member 16 is moved in advance beyond the predetermined range to the lower temperature side on the left in the drawing as required, the connecting member 19 is pushed by the member 16 and moves from the operating position shown in the second figure to the non-operating position shown in the fourth figure. Switched to operating position. Thus, in this switching state, the pushbutton 13
When the push operation is given to the gas valve 9, the gas valve 9 does not respond to this, and only the water valve 7 opens in response, and the water from the water supply side is directly introduced to the hot water outlet side. It will be destroyed. Next, when the push button 13 is returned to its initial position by pushing the button again and the adjusting member 16 is moved to the right, the connecting member 19 is released from the pressure and returns to its original operating position. When the push button 13 is pushed, the gas valve 9 is also pushed open and normal operation can be achieved.

Although the above is not particularly different from the previously proposed one, according to the present invention, the gas utilization adjustment lever 20b is moved to the first position.
When the temperature adjustment member 16 is moved to the high temperature side within a predetermined range in the illustrated position, the engagement between the cam plate 14b ₂ and the protrusion 18 of the temperature adjustment member 16 is released from slightly to the left of the first illustration; Thereafter, the water amount control member 14a is operated by the movement of the member 16 to reduce the water amount, and the gas amount control member 14b stops at the position at which the engagement was released, and the amount of gas corresponding to that position is applied to the main burner 2a. Supplied. Thus, the relationship between the amount of hot water discharged and the temperature rise of the discharged hot water relative to the supplied water is shown in Figure 7.
The slope becomes gentle like the _A1 curve. When the temperature control member 16 is moved to the lower temperature side (left side in the figure) than the engagement, the protrusion 18 presses the cam plate _14b2 and rotates it, so that the gas amount is reduced via the valve rod _14b1 . decreases, while the amount of water increases. Thus, the relationship between the amount of hot water dispensed and the temperature rise of the dispensed hot water relative to the supplied water becomes steeper on the high temperature side, as shown by curve _A2 in Figure 7.

Now, if the position of the gas amount adjustment lever 20b shown in FIG. 1 is set to the spring and autumn positions, in winter, the lever 20b is moved to the right (solid line) as shown in FIG. ) until it hits. In this state, when the temperature adjusting member 16 is located on the high temperature side where the protrusion 18 does not engage the cam plate 14b ₂ , the cam plate 14b ₂ is held until the pin 20a abuts the lower end of the right side edge of the through hole 21, that is. From spring and autumn, it rotates to the side that increases the amount of gas (the side that decreases the amount of water) and stops. Thus, this stopped cam plate 1
_4b2 and the protrusion 18 and move the temperature adjustment member 16 to the high temperature side (right side in the figure), the seventh
It becomes gentler as shown in the _B1 curve in the diagram, and becomes steeper than the _{B1 curve as shown in the B2 curve} when moving to the lower temperature side (to the left of the diagram) from the time of engagement.

In the summer, as shown in Figure 6, the gas amount adjustment lever 2
Rotate 0b to the left (two-dot chain line) until it hits the stopper 23. In this state, the temperature adjusting member 16 is placed on the high temperature side where the protrusion 18 does not engage with the cam plate 14b ₂ .
is located, the cam plate _14b2 rotates until the pin 20a contacts the upper right edge of the through hole 21, that is, in the direction where the gas amount decreases (the water amount increases) from spring and autumn. and stop. Thus, when the stopped cam plate _14b2 disengages from the protrusion 18 and moves the temperature adjustment member 16 to the high temperature side, the curve becomes gentler as shown in the curve _C1 in Fig. 7, and the temperature is lower than when engaged. When moving to , it becomes steeper than the C _{1 curve, like the C 2 curve} .

In this equation, the relationship between the hot water output on the high temperature side and the temperature rise of the hot water relative to the supplied water was determined so that the hot water temperature for the same hot water output amount would be the same in all four seasons, taking into consideration the room temperature. For example, the through hole 2
It can be set depending on the shape of the right edge of 1.

(Effects of the invention) The present invention dissociates the water flow control member and the gas flow control member that control the hot water temperature at a temperature higher than the set value of the temperature rise of the hot water, thereby making it possible to freely adjust only the water flow control member and setting the above-mentioned settings. Since the value is freely adjustable, the user will not feel uncomfortable due to a sudden change in the hot water temperature due to a slight adjustment to the high temperature side of the temperature regulating member connected to both control members, unlike in the past. By making a slight adjustment to the lower temperature side of the temperature control member, the hot water temperature can be conveniently adjusted by a slight change in the hot water amount, and the gas amount can be adjusted even when the season changes. There is an effect that the temperature of hot water at a predetermined amount of hot water can be kept constant simply by operating the adjustment member.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of one example of the proposed water heater, Figure 2 is an enlarged front view with some of its main parts removed, Figure 3 is a cutaway side view, and Figure 4 corresponds to Figure 2. A front view of the connecting member in the retracted state, Figure 5 is A of Figure 1.
-A side view as seen from the A line, Figure 6 is an explanatory diagram of the relationship between the gas amount adjustment lever and the pin of the cam plate, and Figure 7 is a diagram showing the relationship between the amount of hot water discharged and the rise in temperature of hot water in the present invention and the conventional example. It is. 1... Heat exchanger, 2... Burner unit, 4,
11... Operation rod, 7... Water valve, 9... Gas valve, 13... Push button, 14... Control member, 1
4a...Water amount control member, 14b...Gas amount control member, 14b ₁ ...Valve lever, 14b ₂ ...Cam plate, 15...
... Water passage, 16 ... Temperature adjustment member, 18 ... Protrusion, 19 ... Connection member, 20 ... Gas amount adjustment member, 20a ... Pin, 20b ... Gas amount adjustment lever, 21 ... Through hole.

Claims (1)

[Claims for Utility Model Registration] 1. A water flow rate control member and a gas flow rate control member for controlling the hot water temperature, the two members being interlocked to reduce or increase the gas volume in response to an increase or decrease in the hot water flow rate. In the instantaneous water heater of the above-mentioned type, the interlocking of the two members is released at a temperature higher than the set value of the temperature rise of the hot water, and only the water volume control member is made freely adjustable, and the gas amount adjusting member is made to freely adjust the set value. A hot water temperature adjustment device characterized by comprising: 2. A push-button is provided on the front of the water heater body, which has a heat exchanger inside and a burner unit facing the heat exchanger, and a pair of operating rods that respond to the push-button operation of the push-button are used. The gas valve in the gas passage connected to the burner unit and the water valve in the water passage connected to the heat exchanger are opened, and the water flow control member for controlling the hot water temperature and the temperature adjustment member connected to the gas flow control member are movable. In the instantaneous water heater, a connecting member is provided between the operating rod corresponding to the gas valve and the push button, and is always in an operating position and connects the operating rod and the push button to each other. When the adjusting member moves to a low temperature side beyond a predetermined temperature range, the connecting member is pushed by the adjusting member and can freely move back to the inoperative position, and the gas amount adjusting member is prevented from being moved. A hot water temperature control device according to claim 1 of the utility model registration claim.