JPH05272803A - Hot water boiler - Google Patents

Abstract

PURPOSE:To provide a hot water boiler without providing any separate hot water cold water changing-over knob for use in changing over hot water and cold water and capable of performing a safe changing-over between the discharged cold water and hot water having a suitable temperature. CONSTITUTION:A master valve operated type hot water boiler A is structured such that it has a gas volume adjusting knob 4 for making a gas burner inoperative at a 'water' position 41 and making the gas burner operative combustion state ranging from a 'minimum heating amount' position 42 to a 'maximum heating amount' position 43, and a water amount adjusting knob 3 for use in adjusting a degree of opening of the water amount adjusting valve arranged in a heat exchanging water passage.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a water heater.

[0002]

2. Description of the Related Art Conventionally, a heating amount adjusting knob for adjusting a heating amount of a heating means for heating a heat exchanger and a water amount adjusting knob for adjusting an opening degree of a water amount adjusting valve arranged in a heat exchange channel are provided. There is known a water heater in which the amount of hot water and the temperature of hot water can be varied in a wide range by independently adjusting each knob.

[0003]

DISCLOSURE OF THE INVENTION The inventors of the present invention, when the hot-water switching knob is set to the "water" side based on the water heater, switch the heating means inoperative to discharge water from the hot-water tap. A water heater with a knob was prototyped. However, the following problems have been found in the water heater with the hot and cold water switching knob. (A) In particular, when the heating amount control knob is set to the high heating amount side while using with a small amount of water (the water amount control knob is on the low water side) (the hot water switch knob is on the "water" side), the hot water switch knob is set to " Hot water "
When switched to the side, the water discharged from the hot water pipe suddenly changes to hot water. (A) Since the hot water switching knob, the heating amount adjusting knob and the water amount adjusting knob are arranged on the front surface of the water heater case, the front surface of the case is complicated. An object of the present invention is to provide a water heater that does not require a separate hot water switching knob for switching between water and hot water and that can safely switch discharged water to hot water at an appropriate temperature.

[0004]

In order to solve the above-mentioned problems, the present invention comprises a water supply pipe, a heat exchanger and a hot water supply pipe connected in series, and an opening / closing valve and a water quantity control valve are arranged in a water channel. A heat exchange channel, heating means for heating the heat exchanger when the on-off valve is opened and water flows in the heat exchange channel, and a water amount adjusting knob for adjusting the opening of the water amount adjusting valve, In the range from the "minimum heating amount" position to the "maximum heating amount" position, the heating means can be operated to adjust the heating amount of the heating means,
At the "water" position set in the direction of maximum anti-heating power from the "minimum heating amount" position, a heating amount adjusting knob for disabling the heating means is employed.

[0005]

When the heating amount control knob is at the "water" position, when the on-off valve is opened to allow water to flow into the heat exchange channel, the heating means does not operate and water is discharged from the hot water supply pipe. Here, when the heating amount adjusting knob is displaced beyond the "minimum heating amount" position, the heating means operates and the discharged water is changed to hot water. Also, the heating amount control knob moves from the "minimum heating amount" position to the "maximum heating amount".
In the position range, when the on-off valve is opened and water flows into the heat exchange channel, the heating means operates and hot water is discharged from the hot water supply pipe.

[0006]

EFFECT OF THE INVENTION The heating amount adjusting knob is set to the "water" position,
When water is discharged from the hot water supply pipe and used, if the heating amount adjustment knob is displaced to any position beyond the "minimum heating amount" position, hot water will be discharged and the temperature will gradually rise. It is possible to excel in safety. Even if the water amount adjusting knob is on the small water amount side and the opening of the water amount adjusting valve is small, the hot water is not suddenly discharged when the heating amount adjusting knob is displaced. The heating amount control knob is in the position range from the "heating amount minimum" position to the "heating amount maximum" position, and is determined from the hot water supply pipe by the heating amount corresponding to the heating amount adjusting knob position and the water amount corresponding to the water amount adjusting knob position. "Minimum heating amount" when using hot water at a certain temperature
If the heating amount control knob is displaced beyond the position, the temperature of the hot water to be discharged is gradually lowered, and it naturally changes to the discharge of water, which is convenient. When the heating amount control knob is set to the "water" position and water is being discharged from the hot water supply pipe, the amount of water discharged changes by displacing the water amount control knob.
Easy to use. Since hot water switching can be performed with the heating amount adjustment knob, the hot water switching knob is not necessary and the front surface of the water heater case is not complicated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. As shown in the figure, the hot water heater A has a water supply pipe 1
1, a heat exchanger 12, and a hot water supply pipe (hot water supply pipe) 13 are successively arranged in this order, and a water flow control valve 14 and a motor 151 are provided in a water channel.
The heat exchange passage 1 in which the electric water shutoff valve (open / close valve) 15 driven by the water is disposed, and when the electric water shutoff valve 15 is opened and water flows into the heat exchange water passage 1, the heat exchanger 12 is heated. The heating means 2 for bringing the gas burner 21 into the combustion state, the water amount adjusting knob 3 which is connected to the water amount adjusting valve 14 and adjusts the opening thereof, and the "water" position 41 to the "minimum heating amount" position 42 (No. 2.5). ) And a "maximum heating amount" position 43 (No. 5.0), which is variable.

The water supply pipe 11 is provided with a water governor valve 16, which also functions as a water pressure responsive member, between the electric shutoff valve 15 and the water amount control valve 14. The water flow switch 160 connected to the water governor valve 16 and the water pressure responsive valve 24 closes its electrical contact when water flows through the water governor valve 16. Hot water pipe 13
Is formed by covering a metal flexible tube with a resin tube, and a shower head 131 is fitted to the tip of the flexible tube. A water flow switch 132 is attached to the shower head 131, and a shower or a straight water flow 133 can be selected by the operation thereof. As shown in FIG. 5, the water amount control valve 14 includes a valve body 144 including a valve hole 140 formed in the water supply pipe member, a conical portion 141 located in the valve hole 140, and a rod-shaped portion 143 with a collar 142.
And the spring 14 elastically mounted between the collar 142 and the water supply pipe member.
5 and.

Reference numeral 30 shown in FIG. 5 is a cam having a thin portion and a thick portion, and the tip of the rod portion 143 is pressed against the illustrated position on the back side of the cam 30. The cam 30 is rotated by being connected to the water amount adjusting knob 3 via a connecting rod (not shown), and the minimum water amount point 31 and the maximum water amount point 32 of the water amount adjusting knob 3 are rotated by a stopper (not shown). It is at the limit.

The electric shutoff valve 15 connected to the drive shaft of the motor 151 has a spindle 155, as shown in FIG.
Thin portion 152a (notch 154 side) and thick portion 15
A substantially disk-shaped cam 15 having 2b (notch 153 side)
When pressed by the bottom surface of the pilot valve 2, the pilot valve 150 operates to open the valve. Further, 6 is a position switch, and the spring portion 61 is cut out by the rotation of the motor 151.
When fitted into 53, 154, the electrical contact opens.

The heating means 2 includes a gas burner 21 and an electromagnetic safety valve 23 and a water pressure responsive valve 2 which are arranged in a gas line 22.
4, a gas governor valve 25 and a gas amount control valve 26, and a thermocouple 27, a frame rod 28, and a sparker 29, which are arranged at appropriate positions of the gas burner 21, and are provided with a control device 20.
Controlled by.

The gas amount control valve 26, as shown in FIG.
Between the valve hole 266 formed in the gas pipe member, the conical portion 261 located in the valve hole 266 and the rod-shaped portion 263 with the collar 262, and between the collar 262 and the gas pipe member. It is composed of an elastic spring 265.

Reference numeral 40 (shown in FIG. 5) is connected to a gas amount adjusting knob 4 which is rotatable in a range between a "water" position 41 and a "maximum heating amount" position 43 via a connecting rod (not shown). Was done,
It is a cam having a thin portion (a concave portion 401 is bored in the side wall) and a thick portion, and the tip of a rod-shaped portion 263 is in pressure contact with the illustrated position on the back side of the cam 40. The spring portion 260a of the hot and cold water changeover switch 260 is in contact with the side wall of the cam 40, and the hot and cold water changeover switch 260 extends from the "maximum heating amount" position 43 to the "minimum heating amount" position 42 of the gas amount adjusting knob 4.
Is closed, and at the “water” position 41, the hot and cold water switch 260 is opened.

The control unit 20 receives the outputs of the thermocouple 27 and the flame rod 28, and a combustion detection circuit 201 for maintaining the combustion of the gas burner 21, and an ignition control circuit for controlling the operation of the sparker 29 to ignite the gas burner 21. 20
2 and an electromagnetic safety valve drive circuit 203 that closes the electromagnetic safety valve 23 in the case of abnormal combustion, and a water shutoff valve drive circuit 204 that energizes the motor 151 that drives the electric water shutoff valve 15. 3 (a)}.

The water shutoff valve drive circuit 204 includes an operation switch 5
The electric signals sent from the resistance terminals 51 and 62 of the position switch 6 are input, and the motor 151 is energized based on these electric signals.

The ignition control circuit 202 includes a water flow switch 16
It is a circuit that is activated when both 0 and the hot and cold water changeover switch 260 are in the closed state, and energizes the sparker 29 for a predetermined time to ignite the gas burner 21.

The combustion detection circuit 201 is a circuit that monitors the combustion of the gas burner 21 by the thermocouple 27 and the frame rod 28 and sends a safety signal to the electromagnetic safety valve drive circuit 203 while normal combustion is maintained.

The electromagnetic safety valve drive circuit 203 is a circuit that holds the electromagnetic safety valve 23 open while the safety signal is maintained.

The original stop type water heater A operates as follows. When the gas amount adjusting knob 4 is in the "water" position 41 Lightly depress the operation switch 5 to operate the operation switch 5
When the contact is closed, the Hi signal is input to the input terminal 204a of the water shutoff valve drive circuit 204, and the motor 151 operates. The cam 152 rotates in accordance with the operation of the motor 151, and when the notch 153 of the cam 152 releases the pressing of the spring portion 61 of the position switch 6, the contact of the position switch 6 is opened, and the input terminal of the water shutoff valve drive circuit 204. The Lo signal is input to 204b, and the motor 151 stops. In this state,
The spindle 155 is pressed by the cam 152, the electric shutoff valve 15 is opened, and water is discharged from the shower head 131. The amount of water to be discharged can be increased or decreased by the turning position of the water amount adjusting knob 3. It should be noted that the water flow switch 160 detects running water, and the water flow switch 160 is closed but the hot water switch 260 is in the open state, so the gas burner 2
1 does not burn. When the operation switch 5 is lightly pressed during water discharge to close the contact of the operation switch 5, a Hi signal is input to the input terminal 204a of the water stop valve drive circuit 204, and the motor 151 is driven again. .. When the motor 152 is driven, the cam 152 rotates, and when the notch 154 of the cam releases the pressing of the spring portion 61 of the position switch 6, the contact of the position switch 6 is opened and the input terminal of the water shutoff valve drive circuit 204. The Lo signal is input to 204b, and the motor 151 stops. In this state, the spindle 15
5 is released, the electric shutoff valve 15 is closed,
The running water stops. When the gas amount adjusting knob 4 is rotated from the "water" position 41 to a position at which the predetermined heating amount is obtained from the "minimum heating amount" position 42 or more during the discharge of water, the hot and cold water switch 260 is closed. Gas burner 21
Becomes a burning state, the water discharged from the shower head 131 changes to hot water, and the temperature of the hot water rises according to the amount of rotation.
In this state, set the gas amount adjusting knob 4 to the “water” position 41
When it is rotated in the direction, the temperature of the hot water to be discharged gradually decreases, and the water is discharged at the “water” position 41. When the operation switch 5 is lightly pressed during hot water discharge to close the contact of the operation switch 5, the motor 151 is driven, the spindle 155 is released, and the electric water shutoff valve 15 is released.
Is closed, the flow of water stops, the contact of the water flow switch 160 is opened at the same time, the electromagnetic safety valve 23 is closed, and the combustion of the gas burner 21 is stopped.

When the gas amount adjusting knob 4 is located at an arbitrary position above the "minimum heating amount" position 42, a light pressing operation is performed on the operation switch 5
When the contact is closed, the Hi signal is input to the input terminal 204a of the water shutoff valve drive circuit 204 and the motor 151 is operated, as described above. The cam 152 rotates in accordance with the operation of the motor 151, the notch 153 of the cam 152 releases the pressing of the spring portion 61 of the position switch 6, and the position switch 6
Contacts of the water shutoff valve drive circuit 204 is opened,
The Lo signal is input to 4b, and the motor 151 stops. In this state, the spindle 155 is pressed by the cam 152, the electric shutoff valve 15 is opened, and water is first discharged from the shower head 131. However, when running water is detected and the water flow switch 160 is closed, the gas burner is closed. Since 21 becomes a combustion state, hot water having a temperature determined by the heating amount corresponding to the rotating position of the gas amount adjusting knob 4 and the water amount corresponding to the rotating position of the water amount adjusting knob 3 is immediately discharged from the shower head 131. It comes to discharge. Incidentally, when the operation switch 5 is lightly pressed during the discharge of the hot water, the motor 151 is driven to release the pressing of the spindle 155 in the same manner as described above, and the electric water shutoff valve 15 is closed to stop running water.
Also, while the hot water is being discharged, adjust the gas volume control knob 4 to the “water” position 4
When it is rotated in one direction, the temperature of the hot water to be discharged is gradually lowered in the same manner as above, and the water is discharged at the “water” position 41.

Next, the advantages of the original stop type water heater A will be described. (A) Set the gas volume control knob 4 to the “water” position 41, and discharge water from the hot water pipe 13 to use the “minimum amount of heating”.
If the gas amount adjusting knob 4 is rotated beyond the position 42 to an arbitrary position, the hot water will be discharged when the "minimum heating amount" position 42 is reached, and the temperature of the hot water will gradually rise. It's safe. Even if the water amount adjusting knob 3 is on the small water amount side and the opening of the water amount adjusting valve 14 is small, when the gas amount adjusting knob 4 is rotated, the temperature of the hot water gradually rises and does not suddenly become hot water. So it's safe. (Ii) The gas amount adjusting knob 4 is in an arbitrary range between the “minimum heating amount” position 42 and the “maximum heating amount” position 43, and the heating amount corresponding to the gas amount adjusting knob 4 position from the tap pipe 13 "Minimum amount of heating" during use by discharging hot water whose temperature is determined by the amount of water and the amount of water corresponding to the 3 positions of the water amount adjusting knob
When the gas amount adjusting knob 4 is rotated below the position 42, the temperature of the hot water to be discharged is gradually lowered and the water is naturally discharged, which is convenient. (U) When the gas amount adjusting knob 4 is set to the “water” position 41 and water is being discharged from the hot water outlet pipe 13, the amount of water discharged is changed by displacing the water amount adjusting knob 3, which is convenient. .. (E) Since the hot water switching is performed by the gas amount adjusting knob 4 as well, the conventional hot water switching knob is unnecessary, and the front surface of the water heater case 7 is not complicated. (E) With the recess 401 formed in the side wall of the thin portion of the cam 40, the hot and cold water switch 260 can be held in the open state at the "water" position 41 with a simple structure, and the gas burner 21 will not be in a burning state. You can

Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in the figure, the stopper type water heater B is
A water supply pipe 11 provided with a water amount control valve 14, and a heat exchanger 12
And a heat exchange water channel 1 in which hot water supply pipes 130 having water faucet (open / close valve) 113 are sequentially connected, a water amount adjusting knob 3 for manually adjusting the opening of the water amount adjusting valve 14, and a heat exchanger 12. When the water flow switch 160 detects the water flow flowing through the heat exchange water passage 1, the heating means 2 for heating the heating means 2, the gas quantity adjusting knob 4 for manually adjusting the opening degree of the gas quantity adjusting valve 26, and the heating means 2 are activated. Control device 20 for

The control device 20 shown in FIG. 8 controls the operation of the combustion detection circuit 201 to which the outputs of the thermocouple 27 and the flame rod 28 are input, and the operation of the sparker 29 to ignite the gas burner 21, and the ignition control circuit 202. And an electromagnetic safety valve drive circuit 2 that closes the electromagnetic safety valve 23 in the case of abnormal combustion
03 and.

The ignition control circuit 202 operates when both the hot and cold water switch 260, which also serves as a power switch, and the water flow switch 160 are closed, and energizes the sparker 29 for a predetermined time to ignite the gas burner 21. Is.

The combustion detection circuit 201 is a circuit that monitors the combustion of the gas burner 21 by the thermocouple 27 and the frame rod 28 and sends a safety signal to the electromagnetic safety valve drive circuit 203 while normal combustion is maintained.

The electromagnetic safety valve drive circuit 203 is a circuit that holds the electromagnetic safety valve 23 open while the safety signal is maintained.

The stopper type water heater B operates as follows. When the gas amount adjusting knob 4 is in the “water” position 41, the contact of the hot and cold water switch 260 is in the open state. Then, when the faucet 113 is opened, water flows in the heat exchange channel 1, and the water flow switch 160 detects the flowing water and closes the contact, but since the contact of the hot and cold water changeover switch 260 is in the open state, the gas burner is opened. 21 does not become a burning state, and the faucet 11
Water is discharged from the tap of 3. The amount of water discharged can be increased or decreased by rotating the water amount adjusting knob 3. When the gas amount adjusting knob 4 is rotated from the "water" position 41 to a position at which the predetermined heating amount is obtained from the "minimum heating amount" position 42 or more during the discharge of water, the hot and cold water switch 260 is closed. Therefore, the gas burner 21 is in a combustion state, and the faucet 11
The water discharged from the faucet 3 changes to hot water, and the temperature of the hot water is determined by the gas amount and the water amount adjusting knob 3 which are determined by the amount of rotation of the gas amount adjusting knob 4. In this state, when the gas amount adjusting knob 4 is rotated toward the "water" position 41, the temperature of the hot water to be discharged gradually decreases, and the water is discharged at the "water" position 41.

When the gas amount adjusting knob 4 is at any position above the "minimum heating amount" position 42, the hot and cold water changeover switch 2
The contacts of 60 are closed. Then, when the faucet 113 is opened, water flows in the heat exchange channel 1 and the water flow switch 16
0 detects the flowing water and the contact is closed, and the gas burner 21
Becomes a combustion state, and hot water is discharged from the faucet of the faucet 113. The temperature of the hot water rises according to the amount of rotation of the gas amount adjusting knob 4. In this state, when the gas amount adjusting knob 4 is turned toward the "water" position 41, the temperature of the hot water discharged gradually. To the water discharge at the “water” position 41.

The stopper type water heater B has the above-mentioned (A) to (O).
In addition to the advantages according to, there are the following advantages. (Or) Set the gas volume control knob 4 to the "water" position 41,
When the hot water switch 260 is closed, the power supply to the control device 20 can be stopped. That is, the hot water switch 2
60 can also function as a power switch, and if you do not use it for a long time, if you set the gas amount adjustment knob 4 to the “water” position 41, in the unlikely event that a cockroach etc. comes into contact with the control device 20 or there is water However, combustion does not start accidentally.

The present invention includes the following embodiments in addition to the above embodiments. α. The water volume control knob and heating volume control knob are either one or both slide type (left / right, up / down,
It may be diagonal). β. The operation switch 5 may be omitted by combining the water amount adjusting knob 3 with an electric switch whose contacts are closed when pressed. γ. In the main stop type water heater A, the electric water stop valve 15 may be a manual type.

[Brief description of drawings]

FIG. 1 is a front view of a main stop type water heater showing a first embodiment of the present invention.

FIG. 2 is a structural explanatory view of the original stop type water heater.

FIG. 3 is a block diagram showing the electrical connection of the main stop water heater and a time chart showing control of the water stop valve.

FIG. 4 is a structural explanatory view showing the principle of the electric water shutoff valve of the original water heater.

FIG. 5 is a structural explanatory view showing the principle of the water amount control valve and the gas amount control valve of the main stop water heater.

FIG. 6 is an explanatory view of a front stop type water heater showing a second embodiment of the present invention.

FIG. 7 is a structural explanatory view of the pre-stop water heater.

FIG. 8 is a block diagram showing the electrical connection of the pre-stop type water heater.

[Explanation of symbols]

 A source stop type water heater (water heater) B first stop type water heater (water heater) 1 heat exchange channel 2 heating means 3 water amount adjusting knob 4 gas amount adjusting knob (heating amount adjusting knob) 11 water supply pipe 12 Heat exchanger 13 Hot water supply pipe (hot water supply pipe) 14 Water amount control valve 15 Electric shutoff valve (open / close valve) 41 “Water” position 42 “Minimum heating amount” position 43 “Maximum heating amount” position 113 Faucet (opening / closing valve) 130 Hot water supply pipe

Claims (1)

[Claims] 1. A heat exchange water passage in which a water supply pipe, a heat exchanger, and a hot water supply pipe are connected in a row, and an opening / closing valve and a water amount adjusting valve are arranged in the water passage; Heating means for heating the heat exchanger when water flows into the water exchange passage, a water amount adjusting knob for adjusting the opening degree of the water amount adjusting valve, and a water amount adjusting knob for adjusting the opening degree of the water amount adjusting valve to a "heat amount maximum" position range. The amount of heat of the heating means can be adjusted by making the heating means operable, and the amount of heat is adjusted so that the heating means cannot be operated at the "water" position set in the maximum anti-heating force direction from the "minimum heating amount" position. A water heater equipped with a knob.