JPH0345292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to an instantaneous water heater using a gas burner as a heat source.

(Prior art) Conventional water heaters include a heat exchanger and a heat source for heating the heat exchanger in the main body, and a temperature control device that adjusts the temperature of hot water from a hot water outlet connected to the heat exchanger, and a temperature control device that controls the hot water output and the hot water output stop. Instantaneous water heaters equipped with a hot water controller for operation are generally known, and their temperature control device has a bypass passage in addition to the main passage passing through the heat exchanger, as seen in, for example, Japanese Utility Model Publication No. 1095/1983. a bypass passage, a throttle valve as a temperature control device is provided in the bypass passage, and the throttle valve adjusts the amount of water flowing through the bypass passage to adjust the hot water temperature, or Utility Model Application No. 60-113442 As seen in the publication, there are known methods in which the outlet temperature is adjusted by adjusting both the amount of water that reaches the heat exchanger and the capacity of the heat source that heats the heat exchanger, or methods in which only one of them is adjusted.

(Problem to be Solved by the Invention) However, with this product, if we consider the case where the temperature control device is set to a high temperature range to make the hot water hot for keeping coffee cups warm, high temperature sterilization, etc., When hot water is tapped for the next use, the tapped hot water becomes unnecessary and unnecessarily high temperature, which is undesirable.

(Means for Solving the Problems) An object of the present invention is to obtain an instantaneous water heater that is free from such inconveniences, and includes a heat exchanger and a heat source for heating the water heater inside the water heater body. With,
In a device that is equipped with a temperature control device that adjusts the temperature of hot water discharged from a hot water outlet connected to the heat exchanger, and a hot water operator that performs hot water tap and hot water tap stop operations, A switching device is provided to switch the temperature control device from a high temperature setting range to a low temperature setting side.

(Example) An example of implementing the present invention will be described with reference to a case in which the temperature of hot water discharged from a tap hole is adjusted by adjusting the amount of water passing through a heat exchanger.

In the drawing, 1 indicates a water heater main body, and the water heater main body 1
The interior includes a heat exchanger 3 and a heat source 4 for heating the heat exchanger 3, as well as a temperature control device 5 for adjusting the temperature of hot water from the hot water outlet 2 connected to the heat exchanger 3, and a temperature control device 5 for controlling the heat source 4 to be activated or deactivated. Heat source operator 6 that switches between states
and a hot water operator 7 for performing hot water dispensing and hot water dispensing stop operations.

The one shown is equipped with a gas burner as the heat source 4, and the gas burner is a main gas burner 4a.
The gas supply passage 8 to the main gas burner 4a includes a pilot burner 4b and a permanent burner 4c.
An electromagnetic safety valve 10 that is held open by the electromotive force of a thermocouple 9 facing the constant flame burner 4c, an on-off valve 11 that is opened and closed by manual operation, and water interposed in a water supply channel 12 to the heat exchanger 3. A gas valve 14 interlocked with a governor 13 is interposed, and gas supply passages 15 and 16 to the constant fire burner 4c and pilot burner 4b are branched from the downstream side of the on-off valve 11 of the gas supply passage 8, and the gas The supply passage 16 further includes a pilot valve 17.
mediated.

These electromagnetic safety valves 10 and on-off valves 1
1 and the pilot valve 17 are connected to the push button mechanism 18.
When the push operation is released after the push operation from the start end position A to the end position B, the lock is released at the intermediate position C, and when the push operation is repeated, the lock is released and the spring 19 flips the start end position A. It is operated by the heat source operator 6 which automatically returns to .

In addition, in FIG. 2, 20 is the electromagnetic safety valve 10.
A switch 21 interposed in a forced holding circuit (not shown) that forcibly holds the ignition head in the open position at the beginning of the ignition head.
shows a switch interposed in the operating circuit (not shown) of the spark plug 22 facing the pilot burner 4b.

In addition, when the heat source operator 6 is pressed, the on-off valve 11 is pushed open before the intermediate position C, the switch 20 is switched, the forced holding circuit of the electromagnetic safety valve 10 is activated, and the intermediate position C is activated. The electromagnetic safety valve 10 is pushed open beyond the position C, and further, the pilot valve 17 is opened near the end position B, and the switch 21 is switched to generate a spark at the spark plug 22.

For this reason, the starter burner 4b is ignited, which is then used to ignite the permanent burner 4c. Next, when the pressure on the heat source operator 6 is released, the heat source operator 6 is bounced by the spring 19 and returns in the direction of the starting end position A, and is locked at the intermediate position C by the push mechanism 18.

For this reason, the electromagnetic safety valve 10 is held open by the electromotive force generated by the forced holding circuit when the thermocouple 9 facing the normally lit burner 4c is heated at the beginning of the ignition head, and the on-off valve 11 is held open by the electromotive force generated by the thermocouple 9 facing the normally lit burner 4c. 6, the valve is kept in a pressed open state.

Then, when the heat source operator 6 is pressed again and the pressing operation is released, the heat source operator 6 is released from the intermediate position C by the push mechanism 18 and returns to the starting position A. Along with this, the on-off valve 17 closes and all burners 4a, 4b, 4c are extinguished. The water supply channel 12 connected to the heat exchanger 3 has a main valve 23 located upstream of the water governor 13.
A throttle valve 24 is interposed downstream of the water governor 13, and the main valve 23 is operated by the hot water operator 7.

To explain this, the hot water operator 7 consists of an operating rod 26 interposed with a push mechanism 25 that locks it at an intermediate position C when the push operation is released from the start end position A to the end position B. The main valve 23 is configured as a two-stage valve that closes the water supply channel 12 when the hot water operator 7 is at the start end position A and the end position B, and opens only when it is at the intermediate position C.

The temperature adjustment device 5 includes the throttle valve 24 and an operating member 27 for rotating the throttle valve 24. To explain this in more detail, the operating member 27 includes a pinion 29 and an operator 31 provided on a valve rod 28 that is integrated with the throttle valve 24, and a rack 3 that meshes with the pinion 29.
0, and when the operator 31 is moved to the right in the drawing along the guide, the pinion 29 that engages with the rack 30 rotates clockwise, and the throttle valve 24 is accordingly throttled to adjust the temperature of the tapped water. is enhanced.

In the illustrated embodiment, the heat source operator 6 and the hot water operator 7 are brought into contact with one common push button 33, so that they can be operated simultaneously.

Next, to explain the hot water tapping operation of this product, when the push button 33 is pushed from the starting end position A to the ending end position B, the ignition burner 4b is ignited as described above.
Then, when the push operation is released, the hot water operation element 7 and the heat source operation element 6 are locked at the intermediate position C. Along with this, the main valve 23 is opened and water is supplied to the heat exchanger 3 side. Therefore, the water governor 13 is activated and the gas valve 14 is opened. For this reason, gas is supplied to the main gas burner 4a, and ignites and burns through the constant fire burner 4c. As a result, the water passing through the heat exchanger 3 is heated and is discharged from the tap. So far, there is no particular difference from what has been previously known.

The present invention is provided with a switching device 34 that switches the temperature adjustment device 5 from a high temperature setting range to a low temperature setting side in conjunction with the hot water supply stop operation of the hot water operator 7. In detail, the switching device 34 includes a rack 35 that is moved by the push button 33, a ratchet wheel 36 that meshes with the rack 35, a rack 37 that is integral with the rack 30, and a meshing valve lever 28. The rack 35 is composed of a pinion 38 supported on a separate shaft and a gear train 39 connecting the pinion 38 and a ratchet 36. The ratchet wheel 3 is supported by a spring 40 at the other end.
The racks 37 and 35, which are integral with the rack 30, are provided with partially toothless portions 37a and 35a.

(effect) Next, the operation of this device will be explained.

Now, when the push button 33 is pressed from the start position A to the end position B, the ignition burner 4b is ignited as described above, and when the push button is released, the hot water operator 7 and the heat source operator 6 are moved to the intermediate position C. be stopped. Along with this, the main valve 23 is opened and water is supplied to the heat exchanger 3 side. Therefore, the water governor 13 is activated and the gas valve 14 is opened. For this reason, gas is supplied to the main gas burner 4a, and ignites and burns through the constant fire burner 4c. As a result, the water passing through the heat exchanger 3 is heated and is discharged from the tap.

As the push button 33 is pressed from the starting position A to the final position B, the rack 35
moves in the X direction, rotates the ratchet wheel 36 that meshes with it in the direction shown by the dotted line, and thereby rotates the pinion 38 in the direction of the arrow shown by the dotted line. At this time, since the rack 37 has a toothless portion 37a at its right end, when the pinion 38 faces the toothless portion 37a and further pushes the push button 33, the pinion 38 rotates accordingly. However, it just idles,
The rack 37 is not moved further to the left and does not interfere with the pressing operation of the push button 33.

In advance, the temperature adjusting device 5 is moved to the low temperature side, that is, the operator 31 is moved to the left side in the drawing, and the pinion 38 is moved to the toothless portion 3.
In the state facing 7a, the rack 37 does not move even when the pinion 38 rotates, and does not interfere with pressing the push button 33.

Note that the above operation of moving the operator 31 to the left in the drawing is performed in the state shown in FIG.
This cannot be prevented by the engagement of the rack 6 and the rack 35.

Therefore, the throttle valve 24 also does not rotate. When the push button 33 is released, the heat source operator 6 and the hot water operator 7 move toward the starting end position A, and accordingly, the push button 33 also returns to the starting end position A side. During the movement to this starting position A, the heat source operator 6 and the hot water operator 7 are activated by the push mechanism 1.
It is locked at intermediate position C at 8 and 25.

Then, the button 33 is stopped at the intermediate position C by the engagement between the ratchet wheel 36 and the rack 35.

If the operator 31 mentioned above is not moved to the left in the drawing, the rack 37 will mesh with the pinion 38 and move to the left during the hot water tapping operation, but this phenomenon only occurs during the first hot water tapping operation; It does not occur from the hot water tap operation. That is, when the next hot water tap operation is performed, the rack 37 is moved to the left side in advance by the previous hot water tap stop operation as will be described later, and the pinion 38 is in a state opposite to the toothless portion 37a at the right end thereof. There is no movement of rack 37.

The pawl of the ratchet wheel 36 has a shape as shown in FIG. 3, and engages with the rack 35 only when the rack 35 moves in the X direction, and when the push button 33 is released, the rack 35 do not mesh when moving in the anti-X direction. Therefore, the ratchet wheel 26 does not rotate in the direction shown by the solid line.

Next, if high temperature water is required, press operator 3.
1, when the operating member 27 is moved to the right, the pinion 29 on the valve rod 28 that engages with the rack 30 rotates clockwise, causing the throttle valve 24 to rotate toward the side where the throttle increases, that is, clockwise.

Therefore, the amount of water passing through the heat exchanger 3 decreases and the temperature of the hot water increases. During this operation, the ratchet 36 rotates in the solid line direction through the pinion 38 and gear train 39 due to the movement of the rack 37 which is integrated with the rack 30. Along with this, the rack 35 moves in the anti-X direction, but if the rack 35 moves more than a predetermined distance, the ratchet wheel 36 faces the toothless portion 35a of the rack 35, so that the rack 35 no longer moves in the anti-X direction. Never move to.

Incidentally, with this operation, the push button 33 moves toward the starting end position A, but at this time, the heat source operator 6 and the hot water operator 7 are locked at the intermediate position C by the push mechanisms 18 and 25 as described above. It is in.

Furthermore, when high-temperature hot water is not required, that is, when the operating member 27 is not operated by the above-mentioned operating element 31, the ratchet wheel 36 remains engaged with the position of the rack 35 in front of the toothless portion 35a. .

Next, when the push button 33 is pressed again to stop the hot water tap operation, as the rack 35 moves in the X direction, the ratchet wheel 36 rotates in the direction of the arrow shown by the dotted line, and the pinion 38 moves through the gear train 39 as shown by the dotted line. , thereby rotating the throttle valve 24 in a counterclockwise direction, thereby rotating the throttle valve 24 to the side where the degree of throttling decreases, and
Move the operator 31 to the left in the drawing, that is, to the low temperature display side of the tap water temperature.

As a result, after the hot water tap operation is stopped, the throttle valve 24 is set to the side where the degree of throttling is decreased, allowing a large amount of water to pass through, and a low-temperature hot water tap preparation state is established.

If the water heater is used with the operator 31 set to the left low temperature display side, the pinion 38 will be facing the toothless portion 37a of the rack 37 during the hot water dispensing stop operation as described above. sometimes pinion 38
simply rotates idly within the toothless portion 37a.

Furthermore, when releasing the push button 33 after pressing it again in conjunction with the hot water dispensing stop operation, the push button 33 returns to the starting end position A as the heat source operator 6 and the hot water operator 7 return to the starting end position A. to return to. When the push button 33 returns to the starting position A, the ratchet wheel 36 does not rotate because of its pawl shape that does not mesh with the rack 35, as described above.

In the above embodiment, the hot water operation element 7 and the heat source operation element 6 were brought into contact with one common push button 33 to operate them together, but this is different from providing separate push buttons to operate them separately. Needless to say, appropriate changes may be made, such as having the hot water operator 7 operated by pressing the push button 33 of the hot water operator 7 in the above-mentioned embodiment. can also be used as a lever 42.

That is, the main valve 23 is of a type that can be opened and closed by rotational operation, and it is installed on a support shaft Z that rotates as the lever 42 swings, and the lever 42 is moved from the stop position shown by a solid line to the stop position shown by a dotted line. When swinging to the tapping position, the main valve 23 is opened.

By swinging the lever 42 from the tapping position to the stopping position, the rack 30 that engages with the pinion 29 provided on the valve rod 28 of the throttle valve 24 is moved to the side that reduces the degree of throttling of the throttle valve 24. That is, by rotating it counterclockwise, the same operation as described above can be performed.

To explain this, when the lever 42 is swung from the dispensing state in which the main valve 23 is open shown by the dotted line to the solid line position in which the main valve 23 is closed, the right end 30a of the rack 30 is moved to the tip 42a of the lever 42 due to high temperature dispensing. When in the range of motion L, the rack 30 is pushed by the tip 42a of the lever 42 and rotates the throttle valve 24 in a direction that reduces the degree of throttling, that is, in a counterclockwise direction. , when the lever 42 is set to the hot water outlet side shown by the dotted line, the right end 30 of the rack 30
A is created between a and the tip 42a of the lever 42,
Therefore, in the tap state, the rack 30 is connected to the throttle valve 24.
The degree of constriction can be moved to the increasing side, that is, to the right, making it possible to adjust the temperature. Although the temperature adjustment device 5 has been described as one that adjusts the hot water temperature by restricting the amount of water flowing into the heat exchanger 3, the present invention is not limited to this, and the temperature adjustment device 5 can adjust the amount of water flowing through a passage that bypasses the heat exchanger 3. It goes without saying that even in the case of a water heater that regulates the temperature of water, the temperature of the water can be adjusted in the same manner as described above, and the heat source 4 is not limited to a burner, but may be an electric heater or the like.

(Effects of the Invention) As described above, according to the present invention, a switching device is provided that switches the temperature control device from the high temperature setting range to the low temperature setting side in conjunction with the hot water tap stop operation of the hot water operator. Since the temperature control device is always switched from the high-temperature setting range to the low-temperature setting side when this is done, it has the effect of preventing the inconvenience of suddenly hot water coming out the next time it is used.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention; FIG. 1 is a slope view, FIG. 2 is a plan view of the main part, FIG. 3 is a partial slope view, and FIG. 4 is a partial view. Plan view,
FIG. 5 is a schematic diagram showing the main parts of another embodiment. DESCRIPTION OF SYMBOLS 1... Water heater body, 2... Tap water outlet, 3... Heat exchanger, 4... Heat source, 5... Temperature adjustment device, 6...
Heat source operator, 7...Hot water operator.

Claims (1)

[Claims] 1. A water heater is equipped with a heat exchanger and a heat source for heating the heat exchanger, and a temperature adjustment device that adjusts the temperature of hot water from a hot water outlet connected to the heat exchanger, and hot water tapping and hot water stopping operations. 1. A water heater that is equipped with a hot water operator that performs hot water operation, and is provided with a switching device that switches the temperature adjustment device from a high temperature setting range to a low temperature setting side in conjunction with an operation of the hot water operator to stop hot water output.