JPH06317350A - Water heater with hot/cold water switchover mechanism - Google Patents

Abstract

PURPOSE:To obtain a water heater having improved utility of switching use of hot/cold water by conducting the opening and closing of a water tap mechanically when cold water alone is used. CONSTITUTION:When a hot water temperature regulating lever 56 is set at a 'cold water' position, a hot water temperature regulating dial member 138 rotates and a hot/cold water switchover operation piece 142 provided for this hot water temperature regulating dial member 138 pushes down a water tap opening-closing lever 108, so as to open a water tap 20. At the same time, a hot/cold water switchover switch operating piece 144 turns a hot/cold water switchover switch 58 ON so as not to make a gas burner ignited. According to this constitution, the use of cold water alone can be attained by a one-touch operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater used in kitchens of general households, and more specifically, it opens and closes a water stopcock by electric means such as a motor or solenoid valve linked to an ignition switch. The present invention relates to a water heater with a hot and cold water switching mechanism that allows hot water to be discharged or stopped.

[0002]

2. Description of the Related Art Heretofore, as a water heater of this kind, generally known is one that opens or closes hot water by opening and closing a water stop cock by an electric means such as a motor or an electromagnetic valve linked to an ignition switch. Has been. And according to this,
There is an advantage that the hot water can be switched with one touch.

[0003]

However, there are many cases where a water heater is used as a faucet for hot water in the summer without using hot water. However, such a water stop cock is used for a motor, a solenoid valve, or the like. According to the one that electrically opens and closes, even when it is desired to use only water, the water shutoff plug is electrically opened and closed, so that the battery as a driving power source is consumed and the battery is consumed (or the battery is consumed). There was a problem that you couldn't use just water.

The present invention has been made in order to solve such a problem, and an object of the present invention is to mechanically open and close a water stopcock when only water is used. The purpose of the present invention is to provide a water heater with a hot and cold water switching mechanism, in which the convenience of hot and cold water switching is enhanced by performing the automatic operation and the battery consumption as a power source is low.

[0005]

In order to achieve this object, a water heater with a hot and cold water switching mechanism according to the present invention includes a heat exchanger in which a water supply pipe or a hot water discharge pipe is arranged, and the water supply pipe or the hot water discharge pipe. A water stopper provided, a burner for heating the heat exchanger, a gas stopper provided in a gas supply pipe for supplying gas to the burner, and a drive source for opening and closing the water stopper by electrical means. A burner ignition control means for opening the water stop cock and opening the gas supply cock to ignite the burner by driving the drive source during burner ignition operation; and hot water for adjusting the hot water temperature of hot water flowing through the hot water pipe. And a hot and cold water switching control means for mechanically opening only the water shutoff cock without operating the burner ignition control means when the hot water temperature control means is set to the "water" position. That is the gist.

[0006]

According to the water heater of the present invention having such a structure, when the hot water temperature adjusting means is not set to the "water" position, the water stop valve and the gas stop valve are opened by driving the drive source. When the burner is ignited by the burner ignition control means, the water flowing through the feed pipe of the heat exchanger is heated to obtain tap water, but when the hot water temperature adjusting means is set to the "water" position, the burner ignition is performed. Is not operated, and only the water stop cock is mechanically opened by the hot and cold water switching control means. Therefore, only water is discharged from the tap pipe.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a main stopper type water heater as an embodiment of the present invention. As shown in the figure, this hot water heater 10 has a heat exchanger 12 including a water supply pipe 16 and a hot water discharge pipe 18 in the main body of the appliance.
And a gas burner 14 for heating the heat exchanger 12.
And are placed. And, the water supply pipe 16 is provided with a stopcock 2
0 is connected, and a gas supply plug 24 is connected to the source of the gas pipe 22 for supplying gas to the gas burner 14.

The water stop cock 20 is provided with a diaphragm chamber 28 in a water supply passage in the stopper, and a faucet diaphragm 26 is arranged so that a valve port 30 leading to the diaphragm chamber 28 can be opened and closed. It A valve opening 32 is provided at a central portion of the faucet diaphragm 26 corresponding to the valve opening 30, and the valve opening 32 is attached to the tip of a valve spindle 36 penetrating the stopper wall of the water stop cock. The attached water faucet pilot valve 34 is normally provided via a spring 38 in a state of being pressed and biased so as to close the valve opening 32.

Further, the faucet diaphragm 26 is provided with a water passage hole 40 in addition to the valve port 32, and when the valve port 32 is closed by the faucet pilot valve 34, the water pressure in the water supply passage is related. Water in the water supply passage enters the back side of the faucet diaphragm 26 through the water passage 40, and the closed state of the faucet pilot valve 34, that is, the closed state of the valve opening 28 of the diaphragm chamber 28 is maintained. This water stopcock 20 is configured to be held in a water-stopped state.

Further, the diaphragm chamber 28 is partitioned into a primary pressure chamber 44 and a secondary pressure chamber 46 by a hydraulic diaphragm 42, and on the primary pressure chamber 44 side, the hydraulic diaphragm 42 faces the diaphragm from the valve port 30 to the diaphragm. A water amount control valve 48 for controlling the amount of water flowing into the chamber 28 is provided with a spring 50.
The water amount control valve 48 controls the flow rate of water flowing through the water supply passage.

The water that has flowed into the primary pressure chamber 44 is rotatably pierced through the stopper wall of the water stopcock 20.
The water supply pipe 16 and the hot water discharge pipe 1 through the two communication water passages 54.
8 is distributed and supplied to each of the eight water amount throttle shafts 52.
By rotating, the flow rate of water supplied to the water supply pipe 16 and the mixing amount of water to the hot water flowing through the hot water supply pipe 18 can be adjusted.

A hot water temperature adjusting lever 56 is connected to the water amount restricting shaft 52, and the hot water temperature adjusting lever 56 is also connected.
A hot / cold water changeover switch 58 for detecting the rotation of the water amount throttle shaft 52 rotated by the operation is provided in the vicinity. The adjustment of the hot water temperature and the hot water switching mechanism when only water is used will be described in detail in the description of FIGS. still,
In FIG. 1, reference numeral 60 is a water amount control valve for controlling the amount of water sent to the water supply pipe 16 via the communication water passage 54 of the throttle shaft 52.

Further, the side of the secondary pressure chamber 46 of the diaphragm chamber 28 is communicated with a venturi pipe portion 64 provided in the water supply pipe 16 through a bypass pipe line 62, and when water is flowing through the water supply pipe 16. As the secondary pressure chamber 46 becomes a negative pressure from the primary pressure chamber 44 and the water amount control valve 48 moves to the left as shown by the arrow in FIG. 1, the water pressure interlock provided in the gas flow path of the gas supply plug 24 will be described later. At the same time when the gas valve 70 is opened, the water flow detection switch 86 is turned on. Incidentally, reference numeral 66 is a drain plug provided in the secondary pressure chamber 46. Further, reference numeral 68 indicates a strainer provided at the water inlet to the water stopcock 20.

On the other hand, the feed gas plug 24 provided in the gas pipe 22 of the gas burner 14 is a water pressure interlocking gas that opens and closes the valve port 78 in the feed gas flow path inside the plug in association with the movement of the water amount control valve 48. The valve 70, the gas governor 72 that adjusts the opening degree of the valve port 88 according to the gas pressure in the supply gas passage, and the valve port 94 near the gas inlet of the supply gas plug 24 for preventing ignition troubles and the like. Magnet safety valve 74 and a device stopper 76 provided at a valve opening 97 for opening and closing the supply gas flow path
And are provided respectively.

Here, the water pressure interlocking gas valve 70 has its valve shaft 8
2 is inserted through the stopper wall of the gas supply plug 24 and the stopper wall of the water stop cock 20 and the hydraulic diaphragm 42 in the diaphragm chamber 28 is inserted.
The valve 80 is kept closed by the spring 80 in a water-stopped state in which water does not flow to the water tap 20. A switch actuating piece 84 is provided in the middle of the valve shaft 82, and the water flow detection switch 86 which is turned on by the switch actuating piece 84 is provided beside the valve shaft 82, and the water stop cock is provided. When the water flow detection switch 86 is turned on by the switch flow piece 84, the motor 99 described later is driven and the ignition operation is started.

Further, the opening of the valve opening 88 of the gas governor 72 is adjusted via a spring 90 which expands and contracts according to the gas pressure in the supply gas passage, and the magnet safety valve 74 is The valve opening 94 is opened and closed by the operation of the built-in electromagnet. Further, the instrument plug 76 is attached to the tip of a valve shaft 98 that is inserted through the plug wall of the gas supply plug 24, and is normally pressed by a spring to close the valve port 97.

Thus, the motor 99, which is a drive source that is driven in conjunction with the ignition switch to open / close the water stopcock 20 to discharge or stop hot water, has the first to third motor cam shafts linked to its drive shaft. Cams 100, 102, 1
04 is provided, and the first cam 100 is connected to a water stop cock opening / closing lever 108 for opening / closing the water cock pilot valve 34 via a motor interlocking lever 106.
The water stop cock opening / closing lever 108 is linked to the base of the valve spindle 36 of the water stop pilot valve 34, and the valve spindle 36 is moved forward and backward by the operation of the water stop cock opening / closing lever 108 to be closed by the water cock pilot valve 34. The valve opening 32 is opened and closed.

The second cam 102 is connected to the valve shaft 98 of the instrument stopper 76, and the third cam 104 penetrates the stopper wall of the gas supply stopper 24 to magnetize the electromagnet contained in the magnet safety valve 74. It is connected to a safety valve operating rod 96 provided by being inserted. Further, limit switches 110 and 112 for detecting the rotational positions of the first cam 100 and the second cam 102 are provided in the vicinity of the motor 99, and O from these limit switches 110 and 112 are arranged.
The N signal detects that the faucet pilot valve 34 is closed and the instrument stopper 76 is closed. The operation panel 130 (FIG.
2) is provided with an operation button 114 and an ignition switch 116 that is turned on by pressing the operation button 114, and the motor 99 is rotationally driven by turning on the ignition switch 116.

Further, reference numeral 118 indicates an electrode for igniting the gas supplied to the gas burner 14, reference numeral 120 indicates a primary thermocouple for detecting the heat temperature in the vicinity of the gas burner 14, and reference numeral 122 indicates inside the heat exchanger 12. 2 shows a secondary thermocouple provided in the peephole of the casing wall to detect the temperature of the combustion gas.

Next, the above-mentioned adjustment of the hot water temperature and the hot water switching mechanism will be described with reference to the detailed configuration diagrams shown in FIGS. 2 to 5. The water stop cock opening / closing lever 108 is the pivot pin 1.
It is rotatably provided on the mounting base 134 via 32, and a mountain-shaped protruding piece 136 is provided on the upper surface of one side of the water shutoff valve opening / closing lever 108. The hot water temperature adjusting dial member 13 is located above the water tap opening / closing lever 108.
8 is rotatably pivotally attached to the water amount restricting shaft 52, and one side of the hot water temperature adjusting dial member 138 is provided with the water shutoff tap opening / closing lever 108 when the hot water temperature adjusting dial member 138 is turned. Hot and cold water switching operation piece 142 that presses the protruding piece 136
Further, on the other side of the hot water temperature adjusting dial member 138, there is also provided a hot water switching switch operating piece 144 for turning on the hot water switching switch 58 when the hot water adjusting dial member 138 is rotated. ing.

Further, this hot water temperature adjusting dial member 138
The hot water temperature adjusting lever 56 for rotating the
4 is rotatably provided on the operation panel 130 via a support shaft 146, and a main gear 148 formed in a semi-circular shape centering on the support shaft 146 is provided on one side surface of the hot water temperature adjusting lever 56. It is meshed with a secondary gear 150 formed on the outer peripheral surface of the barrel of the hot water temperature adjusting dial member 138. The hot water temperature adjusting dial member 138 is turned by the turning operation of the hot water temperature adjusting lever 56, whereby the water amount restricting shaft 52 is turned and the water distributed to the water supply pipe 16 and the hot water discharge pipe 18 is supplied. Is configured to be adjusted.

On the other hand, the motor interlocking lever 106 for actuating the water tap opening / closing lever 108 by driving the motor 99 at the time of ignition operation has one end rotatably mounted on the mounting piece 152 in the instrument via the mounting pin 154. The engaging piece 156 provided on one side of the motor interlocking lever 106 is a motor cam box 15 in which the motor 99 and the like are integrally housed.
Slider 1 that moves up and down in conjunction with the first cam 100 in
This motor interlocking lever 106 is engaged with 60
A water opening / closing valve operating piece 162 provided on the other side is in contact with a water opening / closing driven piece 164 provided at one end of the water stop cock opening / closing lever 108.

The main stopper type water heater 10 configured as described above
According to the above, the ignition switch 116 is turned on by pressing the operation button 114, and thereby the motor 99 is turned on.
Is driven. Then, the slider 160 moves in conjunction with the rotation of the motor cam linked to the drive shaft of the motor 99.
The motor interlocking lever 10 is pulled down in the direction of arrow A inside.
6 is rotated in the direction of arrow B in the figure.

Then, the operating piece 162 of the motor interlocking lever 106 pushes down the driven piece 164 of the water stop cock opening / closing lever 108 in the direction of arrow C in the figure, and as a result, the water stop cock opening / closing lever 108 pivots on the pivot pin 132. The water faucet valve spindle 36 is pushed down in the direction of arrow D in the figure. As a result, when the faucet pilot valve 34 is retracted, the valve port 30 leading to the diaphragm chamber 28 is opened and water flows into the diaphragm chamber 28, and a part of the water is supplied through the communication water passage 54 of the water amount throttle shaft 52. The water is sent to the pipe 16, and the remaining water is sent to the tap pipe 18.

The water sent to the water supply pipe 16 passes through the Venturi pipe portion 64 to lower the pressure of the diaphragm secondary pressure chamber 46 of the diaphragm chamber 28, and the diaphragm 4
2 moves to the left in FIG. 1, and the hydraulic diaphragm 42
Similarly, the valve shaft 82 that connects the water amount control valve 48 and the water pressure interlocking gas valve 70 of the gas feed plug 24 is moved to the left in FIG. 1, and accordingly, the water pressure interlocking gas valve 70 in the gas feed tap 24 is moved. The water flow detection switch 86 is turned on at the same time when is opened.

O from the water flow detection switch 86
The motor 99 is driven by the N signal, the magnet safety valve actuating rod 96 is pushed down by the third cam 104 of the motor, the magnet safety valve 74 is electrically conducted, and the built-in electromagnet is magnetized to be opened. The valve 98 of the instrument plug 76 is pushed open by 102 and the instrument plug 76 is also opened, whereby the gas supply passage in the gas supply plug 24 is opened, and the gas is supplied to the gas burner 14. At the same time, ignition of an igniter (not shown) causes a continuous spark to fly to the ignition electrode 118, igniting the gas burner 14.

Therefore, the water supply pipe 1 leading to the heat exchanger 12
The water passing through 6 is heated by the gas burner 14 and the tap pipe 1
8 is discharged from the hot water, and at that time, the water directly sent to the hot water discharge pipe 18 through the communication water passage 54 of the water flow reduction shaft 52 is mixed, and the hot water continues to be adjusted to an appropriate temperature. Will be done. Meanwhile, magnet safety valve 7
4, the released state is held. Further, the motor cam is stopped at the combustion position.

On the other hand, in the case of stopping the hot water discharge, when the operation button 114 is pressed again at the combustion stop position of the motor cam to turn on the ignition switch 116, the current holding and holding the magnet safety valve 74 is turned off. At the same time, the motor 99 is turned on again and driven, and the motor cam is returned to the stop position. At this point, the water stop cock opening / closing lever 108 also returns to the original state and the water cock pilot valve 3
4 is closed, the instrument plug 76 and the water faucet pilot valve 34 are also closed, the water supply flow path is cut off, and the gas supply flow path is also cut off to stop hot water discharge.

Next, the operation when only water is used in the stopped state will be described. Now, the hot water temperature adjusting lever 56 is pinched with a fingertip and turned clockwise as indicated by an arrow E in FIG. Then, the action of the main gear 148 and the sub gear 150 meshing with each other is caused by the action of the hot water temperature adjusting dial member 138.
Rotates in the clockwise direction indicated by arrow F in FIG. Therefore, the hot and cold water switching operation piece 142 of the hot water temperature adjusting dial member 138
However, by riding on the projecting piece 136 of the water stop cock opening / closing lever 108, the water stop cock opening / closing lever 108 rotates and the water cock pilot valve 34 is opened.

At the same time, the hot and cold water changeover switch operating piece 144 of the hot water temperature adjusting dial member 138 turns on the hot water and water changeover switch 58 so that the ignition switch 116 is not turned on. Therefore, at this time, even if the operation button 114 is pressed, the ignition switch 116 is not turned on and the gas burner 14 is not ignited.

Next, an explanation will be given of the case of performing the water stop operation in the water discharge state. By returning the hot water temperature adjusting lever 56 to the position in the low temperature / high temperature range from the previous "water" position, the hot water temperature adjusting dial will be described. The member 138 is also the main gear 1
The action between the 48 and the secondary gear 150 causes the arrow G in FIG.
Rotate in the direction (counterclockwise) to adjust the hot water temperature dial member 1
38 hot water switching operation piece 142 and water stop cock opening / closing lever 10
8 is disengaged from the protruding piece 136, and the faucet pilot valve 34 is closed by the spring force of the spring 38. As a result, the water shutoff tap 20 is closed and water output is stopped.

Next, the operation for switching to using only water while tapping hot water will be explained. Now, when the hot water temperature adjusting lever 56 is set to the "water" position during combustion of the gas burner, it is interlocked with the hot water temperature adjusting lever 56. Then hot water temperature adjustment dial member 138
2 rotates in the direction of arrow E (clockwise) in FIG. 2, and the hot and cold water changeover switch 58 is turned on by the hot and cold water changeover switch operating piece 144.
By doing so, the motor 99 is turned on, the motor cam returns to the stop position, all valves are closed, and the gas burner 14 is extinguished.

However, at this time, the hot water temperature adjusting dial member 1
As shown in FIG. 5, the water opening / closing valve operating piece 162 of No. 38 rides on the protruding piece 136 of the water shutoff tap opening / closing lever 108 and interferes with each other as shown in FIG. 5 by the rotation of the hot water temperature adjusting dial member 138. Since the water faucet opening / closing lever 108 keeps the water faucet pilot valve 34 open, the water stop cock 20 is opened and only water is discharged from the hot water outlet pipe 18.

Finally, if it is desired to switch to hot water while using water, the hot water temperature adjusting lever 56 should be returned from the "water" position to the low temperature / high temperature region position and then the operation button 114 should be pressed. Then, the discharge of water from the hot water outlet pipe 18 is once stopped by operating the hot water temperature adjusting lever 56, and then the hot water is discharged from the hot water outlet pipe 18 by the operation of the operation button 114 according to the operation described in FIGS. Will come.

In the above embodiment, the "driving source" described in the claims of the present invention refers to the motor 99, and the "burner ignition control means" sequentially opens the valves of the gas supply plug 24 to cause water flow. A series of sequential control mechanisms that ignite the gas burner 14 in response to a signal from the detection switch 86. The "hot water temperature adjusting means" means the hot water temperature adjusting lever 56 in the above embodiment, and the "hot water switching control means".
The hot water temperature adjusting dial member 138 operated by the hot water temperature adjusting lever 56, and the hot and cold water stopper opening / closing lever 10
8 and a hot water switching switch 58.

As described above with reference to the embodiments, according to the present invention, when the ignition operation is performed, the faucet pilot valve 34 of the water stopcock 20 is opened by the drive of the motor 99 to allow water to flow and each valve of the gas stopcock 24 at the same time. Open the gas burner 14
The hot water is discharged by igniting, and when only water is used, the hot water temperature control lever 56 is manually moved to the “water” position to open the faucet pilot valve 34 of the water stopcock 20. Gas does not flow to the gas supply plug 24,
Since the gas burner 14 is not ignited, only the water is discharged from the tap pipe 18.

Thus, the present invention is in no way limited to the above-mentioned embodiments, which can be fully understood by considering the gist of the present invention. For example, it goes without saying that the mechanical structure for opening only the water stop cock when only water is used can be modified in various ways.

[0038]

As is apparent from the above description, according to the water heater of the present invention, the water tap is opened by the electric means when the ignition operation is performed, and hot water is discharged. However, the burner is not ignited but only the water is discharged. And since it is possible to change the hot and cold water with one touch by hand, it is very convenient. Further, when only water is used, the battery as the motor driving power source is not consumed, so that the useful life of the battery is extended, and even if the battery runs out, it is possible to continuously use only water.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main stopper type water heater as an embodiment of the present invention.

2 is a plan view showing a configuration of a hot water switching mechanism of the water heater shown in FIG. 1. FIG.

FIG. 3 is a partially cutaway front view showing the configuration of the hot water switching mechanism shown in FIG.

FIG. 4 is an operation explanatory view of a hot and cold water switching mechanism in the water heater shown in FIGS. 2 and 3.

FIG. 5 is an operation explanatory view of the hot and cold water switching mechanism in the water heater shown in FIGS. 2 and 3 similarly.

[Explanation of symbols]

 Reference Signs List 10 hot water stopper 12 heat exchanger 14 gas burner 16 water supply pipe 18 hot water supply pipe 20 water stopcock 24 gas stopper 34 water faucet pilot valve 36 valve spindle 56 hot water temperature control lever 58 hot water switch 106 motor interlocking lever 108 Water stop tap opening / closing lever 136 Projecting piece 138 Hot water temperature adjusting dial member 142 Hot water switching operation piece 144 Hot water switching switch operation piece

Claims (1)

[Claims] 1. A heat exchanger provided with a water supply pipe or a hot water discharge pipe, a water shutoff plug provided in the water supply pipe or the hot water discharge pipe, a burner for heating the heat exchanger, and a gas for the burner. A supply gas plug provided in the supply gas supply pipe, a drive source for opening and closing the stop water tap by electrical means, and a drive source for driving the drive source at the time of a burner ignition operation to open the stop water valve and the supply gas. Burner ignition control means for opening the plug and igniting the burner, hot water temperature adjusting means for adjusting the hot water temperature of hot water flowing through the hot water pipe, and burner ignition when the hot water temperature adjusting means is set to the "water" position A water heater with a hot / cold switching mechanism, comprising: hot / cold water switching control means for mechanically opening only the water stop cock without operating the control means.