JPS63302251A - Hot water supplier - Google Patents

Abstract

PURPOSE:To improve safety by installing a safety means which changes the adjustment of hot water supply temp. into a safe lower temp. zone automatically when the adjustment of the hot water supply temp. is in a temp. zone higher than a set one at the starting time of the hot water supply operation. CONSTITUTION:On the basis of the information of a set hot water supply temp. received from a control circuit 012 for the hot water supply temp. and the ON/OFF information of a water flow switch 06, whether a hot water supply temp. set by a hot water supply temp. control 020 exceeds a safe upper limit temp. set in the inside is identified after the two are compared. When the OFF information of the switch 06 is fed in the condition that the set hot water supply temp. exceeds the safe upper limit temp., a safety circuit 022 changing automatically a set temp. from the set hot water supply temp. Tx in the circuit 012 to a set standard temp. To which is lower than the safe upper limit temp. Ts is equipped. Thereby, unforeseen trouble such as the discharge of high temp. water caused by the condition that after the use of high temp. water a user does not return the adjustment in the hot water supply temp. to the low temp. side and that a next user starts the hot water supply can be avoided, whereby a burn accident is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot water supply apparatus provided with an operating tool for intermittent hot water supply and an operating tool for adjusting the temperature of hot water supply.

[Conventional technology]

Conventionally, in the above-mentioned water heaters, the hot water supply intermittent function and the hot water supply temperature adjustment function have not been linked in any way, and no matter what state the hot water supply temperature is in, the hot water supply intermittent operation tool is used regardless of the adjustment state of the hot water supply temperature. The structure was such that hot water supply could be started using normal operations.

[Problem that the invention seeks to solve]

However, in recent years, water heaters that can supply hot water at a high temperature close to boiling temperature by adjusting the hot water supply temperature have become popular, but the user does not return the hot water temperature adjustment device to the low temperature side after supplying high temperature water in the previous use. If the user or another user subsequently starts hot water supply without noticing the hot water temperature adjustment status, or if the intermittent operation of hot water supply has become commonplace in recent years, children may If an operator or the like easily starts hot water supply, there is a risk that hot water will be unexpectedly discharged to the operator, resulting in a burn injury.

An object of the present invention is to improve safety and improve usability by rationally linking the hot water supply intermittent function and the hot water supply temperature adjustment function.

[Means for solving problems]

The characteristic configuration of the hot water supply apparatus according to the present invention is that when the hot water supply is stopped using the hot water supply intermittent operation tool, or when the hot water supply is started by the hot water supply operation tool, when the hot water supply temperature adjustment state using the hot water supply temperature adjustment operation tool is in a high temperature range higher than the setting. , a safety means is provided to automatically change the adjustment state of the hot water supply temperature to a safe low temperature range, and its functions and effects are as follows.

[For production]

In other words, even if the user does not return the hot water temperature adjustment operation tool to the low temperature side after using high temperature hot water supply, if the hot water temperature adjustment state when hot water supply is stopped is in a higher temperature range than the setting, then there is a safety measure. Since the adjustment state of the hot water supply temperature is automatically changed to a safe low temperature range by the function, a situation where unexpectedly high temperature hot water is discharged to the next user when the next user starts hot water supply is avoided.

〔Effect of the invention〕

That is, the safety is improved compared to before, and it is possible to create an overall excellent water heater that matches safety with the high-temperature hot water supply function that has become popular in recent years, and the simplified intermittent operation mode of hot water supply.

Also, by the way, if you are just trying to be safe in case you forget to return the hot water temperature adjustment state to the low temperature side, start water heating when the hot water temperature adjustment state using the hot water temperature adjustment operation tool is in the high temperature range above the setting. It is also possible to simply prevent this from occurring, or to simply change the hot water temperature adjustment state to a predetermined safe temperature when hot water supply is stopped or started, regardless of the hot water temperature adjustment state at that time. However, in the case of devices that prevent the start of hot water supply, hot water supply cannot be started unless some kind of operation is performed to release the block when the block occurs, and the hot water supply temperature adjustment state cannot be automatically adjusted to a predetermined safe temperature. In cases where the change is made, if the use is for normal hot water supply, not high-temperature hot water supply, and the usage temperature is almost constant, the hot water supply may start Each time, the hot water temperature must be changed from the automatically changed safe temperature to the desired temperature, which makes the system inconvenient to use.

On this point, the present invention automatically changes the adjustment state of hot water supply temperature and does not prevent the start of hot water supply, so additional operations such as releasing the blockage are not required even when the safety means functions. In addition, the hot water supply temperature adjustment state is not simply changed automatically, but when the hot water supply temperature adjustment state is in a high temperature range higher than the setting, the hot water supply temperature adjustment state is automatically changed to a safe low temperature range. Because it is a regular hot water supply, not a high temperature hot water supply,
In addition, when hot water is repeatedly supplied at a substantially constant operating temperature, it can be used repeatedly without readjusting the hot water temperature as before, and is excellent in terms of ease of use.

[First Embodiment] Next, a first embodiment of the present invention will be described based on FIGS. 1 and 2.

Figure 1 shows a stop-start instantaneous water heater as an example of a water heater, in which a casing (01) is equipped with a fin-tube heat exchanger (02) for heating water and a gas burner (03) for it.
The water supply channel (04) to the heat exchanger (02) is equipped with a water governor (05), a water flow switch (06) that is turned on by the flow of water, and an automatic valve (07) for adjusting 1 m of water. It is interposed.

The hot water supply path (08) from the heat exchanger (02) is connected to the external piping (0
9) to connect to the hot water tap (010).

Also, a fuel gas supply path (011) to the gas burner (03)
An electromagnetic gas valve (012) for intermittent supply of fuel gas, a gas governor (013), and an automatic valve (014) for adjusting the amount of fuel gas supply are interposed therein.

In the figure, (015) is a spark rond for direct fire to the gas burner (03), and (016) is a flame rond for combustion state detection.

The response operation is automatically controlled by an internal control device (017), which controls electromagnetic gas based on the ON of the water flow switch (06) when the hot water tap (010) is opened. The burner (03) is opened by opening the valve (012) and operating the spark rond (015).
The electromagnetic gas valve (012) is ignited, and the water flow switch (06) is turned off when the hot water tap (010) is closed.
An ignition/extinguishing circuit (018) that closes the valve to extinguish the burner (03), as well as a hot water temperature sensor attached to the hot water supply path (08).
Based on the detection result of step 019), the detected hot water temperature is adjusted to the hot water temperature (Tx) set by the hot water temperature adjustment operation tool (020).
Automatic water flow adjustment valve (07) and fuel gas supply to maintain Each of them is equipped with a hot water supply temperature adjustment circuit (021) that is automatically operated in conjunction with an automatic adjustment valve (014).

In other words, the hot water tap (010) is used as an operation tool for interrupting hot water supply.
The hot water supply operation can be started and stopped automatically by opening and closing the hot water tap (010), and the hot water temperature can be adjusted as appropriate using the hot water temperature adjustment operation tool (020) installed on the appliance itself or the remote controller. .

In addition, the ignition/extinguishing circuit (018) is Flame Rond (0
Based on the combustion state detection by 16), the electromagnetic gas valve (
012) is also configured to close the valve.

The control device (017) has the above-mentioned ignition/extinguishing circuit (018).
In addition to the hot water temperature adjustment circuit (021), the set hot water temperature (021) received from the hot water temperature adjustment circuit (021) is set to prevent burns.
Tx) information and the ON-OFF information of the water flow switch (06), as shown in Figure 2, the hot water temperature (Tx) set by the hot water temperature adjustment operation tool (020) is set internally and safely. In addition to comparing whether or not the upper limit temperature (Ts) is exceeded, the set hot water temperature (Ts) is determined as a result of the comparison.
x) exceeds the safe upper limit temperature (Ts) (T >
When the OFF information of the water flow switch (06) is input at Tg), the set hot water temperature (Tx) in the hot water temperature adjustment circuit <021) is automatically set to the set standard temperature (To) below the safety upper limit temperature (Ts). Safety circuit (022) to change settings to
).

In other words, when the hot water supply is stopped, the operation tool for adjusting the hot water temperature (
020) is in a higher temperature range than the setting, the adjusted state of the hot water supply temperature is automatically returned to a safe low temperature range, so that after using high temperature hot water, the user can This prevents unexpected hot water from being discharged to the next user due to the next user starting hot water without knowing the hot water temperature adjustment state without returning the hot water temperature adjustment state to the low temperature side. to prevent burn accidents.

In addition, in this example, when the hot water temperature adjustment operation tool (020) is configured with a lever, dial, etc., the safety circuit (020)
In accordance with the automatic change of the set hot water temperature (Tx) according to 2), the operating tool (020) itself for adjusting the hot water temperature is also automatically changed to a position corresponding to the set reference temperature (TO) by an appropriate drive means. do.

In addition, when the hot water supply temperature adjustment operating tool (020) is constituted by an electrical temperature selection switch and is equipped with a display means for displaying the hot water supply temperature setting status by the switch, the setting by the safety circuit (022) is performed. As the hot water supply temperature (Tx) is automatically changed, the display on the display means is also automatically changed to a display corresponding to the set reference temperature (To).

[Second Embodiment] Next, a second embodiment of the present invention will be described based on FIGS. 3 to 10.

Figure 6 shows the overall structure of a stop-start instant water heater as an example of a water heater.A casing (2) with an exhaust port (1) formed at the upper end is equipped with a fin-tube water heating heat exchanger ( 3
) and a corresponding gas burner (4) therein, and a flexible hot water tap (5) extending from the lower end of the casing (2) is connected to a hot water discharge path from the heat exchanger (3).

The water supply channel (6) to the heat exchanger (3) includes a water valve (7) for intermittent water supply, a diaphragm water governor (8) for maintaining the water supply pressure to the heat exchanger (3) at an appropriate pressure, and A water flow adjustment valve (9) is installed, and a fuel gas supply path (10) to the burner (4) is equipped with a gas valve for intermittent fuel supply (
1) A hydraulically responsive valve (12) and burner (4) that are linked to the diaphragm water governor (8) and allow fuel gas to be supplied only when water is flowing to the heat exchanger (3). A gas governor (13) and a fuel supply amount regulating valve (14) are interposed to maintain the gas pressure supplied to the fuel tank at an appropriate pressure.

In the figure, (15) is a pilot burner, (16) is a thermocouple for detecting incomplete combustion and extinction, and (17) is a spark rond for ignition.

water! - What is the adjustment valve (9) and fuel supply amount adjustment valve (14)?
They are linked to the machine so that they open and close in a contradictory manner to each other, and the water flow control valve (9) and fuel supply flow control valve (14)
) are used as hot water temperature regulating valves, and the hot water temperature is adjusted by opening and closing the valves in a contradictory manner.

In addition, the water valve (7) and gas valve (11) are also mechanically linked so that they open and close in unison, and the linked opening and closing operations of the water valve (7) and gas valve (11) and the above-mentioned The contradictory linked opening and closing operations of the water amount regulating valve (9) and the fuel supply amount regulating valve (14) are performed using one valve operating motor (1B).

As shown in Figs. 3 and 4, a valve operation structure using one motor (18) has a motor (18) with motor shafts (18a) and (18b) protruding from both front and rear ends of the motor body. The forward speed reducer (19) receives output from the front end motor shaft (18a) and the rear end motor shaft (18a).
b) and a reverse speed reducer (20) that receives output from the output shaft (19) and (20).
9a) and (20a) each with an eccentric rotating cam (21)
, (22) is the installation.

The forward rotation reducer (19) is equipped with a first one-way clutch mechanism (23) such as a ratchet type that transmits only the forward rotation power of the motor (18) to the output shaft (19a) side. The side reducer (20) is equipped with a second one-way clutch mechanism (24), also of the ratchet type, which transmits only the reverse rotational power of the motor (18) to the output shaft (20a).

And the eccentric rotating cam (21) of the normal overturning reducer (19)
an elongated part (25a) to be engaged with is formed on one end side, and
On the other end are the push/pull operation rod (26) of the water valve (7) and the gas valve (1).
A first bell crank (25) is provided to connect the push/pull operation lever (27) of 1), and a reverse speed reducer (20) is also provided.
) to engage the eccentric rotating cam (22) of
is formed on one end side, and connects the push/pull operation rod (29) of the water amount adjustment valve (9) and the push/pull operation rod (30) of the fuel supply amount adjustment valve (14) on the other end side. Bell crank (28)
is provided so that the motor (18) and the multi-valve are interlocked.

In addition, the push/pull operation lever (29) of the water volume adjustment valve (9) has a second
A relay crank mechanism (31) is provided for reversing the push/pull operation transmitted to the water flow control valve (9) in response to the push/pull operation caused by the swinging of the bell crank (28).

That is, in the above-described structure, when the motor (18) rotates in the forward direction, the rotation is transmitted only to the output shaft (19a) of the forward speed reducer (19) by the first one-way clutch mechanism (23). Eccentric rotating cam (21) attached to it
rotates in one direction, and along with this, the eccentric rotating cam (21)
The first bell crank (2
5) swings back and forth to push and pull the push/pull operation rod (26) of the water valve (7) and the push/pull operation rod (27) of the gas valve (11), thereby causing the water valve (7) and The gas valve (11) repeatedly opens and closes in synchronization with the gas valve (11).

Furthermore, when the motor (18) is reversed, the rotation is transmitted only to the output shaft (20a) of the reverse speed reducer (20) by the second one-way clutch mechanism (24), and the eccentric rotating cam ( 22) rotates in one direction, and as a result,
The second bell crank (28) swings back and forth due to the engagement between the eccentric rotating cam (22) and the long shaft (28a), and the water flow adjustment valve (
9) push/pull operation lever (29) and fuel supply amount adjustment valve (14)
The push/pull operation lever (30) of the water flow rate adjustment valve (9) is pushed and pulled, but the relay crank mechanism (31) interposed in the push/pull operation lever (29) of the water flow rate adjustment valve (9) reverses the operation of the water flow rate adjustment valve. (9) and the fuel supply amount adjustment valve (14) repeatedly open and close in a contradictory manner.

The water flow rate adjustment valve (9) and the fuel supply flow rate adjustment valve (14) each have an annular valve seat (9a) as shown in FIG.

(14a) and a conical valve body (9b), (14b) inserted into the valve hole.
By changing the insertion depth of b) and the push/pull operation of the push/pull operation levers (29) and (30), the amount of water flowing and the amount of fuel passing through can be adjusted.

In addition, in the push/pull interlocking between the two control valves (9), (14) and the second bell crank (28), the push/pull operation rods (29), (30) reach the valve closing side end. The annular valve seat (9a), (14a) remains intact even when pushed or pulled.
The operating limit on the valve closing side is defined so that a minimum flow path remains between the valve body and the conical valve body (9b), (14b) to ensure the minimum amount of water passing through and the minimum amount of fuel passing through. .

Regarding the operation configuration for the motor (18), a feather-touch hot water supply operation switch (
32), and a plurality of hot water supply temperature selection switches (33a,
b...) is arranged on the front surface of the casing (2) as shown in Fig. 7, and on the other hand, the rotational phase of the output shaft (19a) of the forward speed reducer (19) is fixed, that is, the A first rotational phase detection mechanism (34) is attached to detect the rotational phase of the eccentric rotary cam (21), and the rotational phase of the output shaft (20a) of the reversing speed reducer (20) is attached to the reverse rotation side reducer (20). A second rotation phase detection mechanism (35) is attached to detect the rotation phase of the attached eccentric rotation cam (22).

As shown in FIG. 8, the first rotational phase detection mechanism rotates the eccentric rotating cam (21) of the normal overturning reducer (19) by 180 degrees each time the hot water supply operation switch (32) is operated once. Based on the phase detection by (34), the motor (
Hot water supply operation circuit (36A) that controls the start and stop of 18) on the forward rotation side
, and the hot water temperature selection switch (33) as shown in FIG.
a, b...) is operated, the eccentric rotary cam (22) of the reverse speed reducer (20) is rotated to the set phase corresponding to the operated hot water temperature selection switch. A control device (36) is provided with a hot water temperature adjustment circuit (36B) that controls the start and stop of the motor (18) on the reverse side based on phase detection by the second rotational phase detection mechanism (35).

In other words, for hot water supply operation, the hot water supply operation switch (32
) by rotating the eccentric rotary cam (21) of the forward speed reducer (19) from θ° to 180°, opening the water valve (7) and gas valve (11). to start hot water supply operation, and then press 2 of the hot water supply operation switch (32).
The second operation rotates the eccentric rotary cam (21) of the forward overturning reducer (19) from iso' to 360°, thereby closing the water valve (7) and gas valve (11) and starting hot water supply operation. It is configured to stop.

Also, to adjust the hot water temperature, use the hot water temperature selection switch (
33a, b...) is operated, by rotating the eccentric rotary cam (22) of the reverse speed reducer (20) to the set phase corresponding to the operated hot water temperature selection switch. , the linked operation state of the water flow rate adjustment valve (9) and the fuel supply ffi adjustment valve (14) is switched to the hot water supply temperature adjustment state corresponding to the operated hot water temperature selection switch, and thereby the hot water supply temperature selection switch (33a, b, ...) to set the hot water temperature by selecting the selection switch <33a.
, b...) are configured to change to a specified temperature from among a plurality of set temperatures individually associated with each other.

The ignition spark rod (17) is connected to the control circuit (36).
), the ignition operation circuit (36C) and timer circuit (36D) provided in the hot water supply operation switch (32
) is operated, and the ignition is activated for a set time from the point of operation.

First and second rotational phase detection mechanisms (34), (35)
For example, the forward-turning reducer (19) and the reverse-turning reducer (2)
The rotational phase of the rotary operation cam attached to the output shaft (19a), (20a) of 0) is 0° or 180°, or the set phase corresponding to each of the hot water temperature selection switches (33a, b...). A detection mechanism for the second cam that turns on the electric contact by the rotating operation cam when the output shaft (19a), (20a) rotates, or a variable resistor whose electric resistance value changes as the output shafts (19a) and (20a) rotate is provided. , a variable resistance type detection mechanism that uses an output voltage or current that changes as the electrical resistance value changes as a rotational phase detection signal, etc. are used.

Moreover, the hot water supply operation circuit (36A) in the control device (36)
Each circuit, such as the hot water supply temperature adjustment circuit (36B), is configured with an electric sequence circuit or a control circuit using a microcomputer.

The control device (36) includes the above-mentioned hot water supply operation circuit (36A), hot water supply temperature adjustment circuit (36B), ignition operation circuit (36C),
In addition, together with the timer circuit (36D), a safety circuit (36E) is provided to prevent hot water from being unexpectedly discharged at the start of hot water supply, and the safety circuit (36B)
), as shown in FIGS. 3 and 10, the first and second rotational phase detection mechanisms (34), (35
), the first rotational phase detection mechanism (3
4) The detection phase reached 360° (returned to 0”)
The detected phase by the second rotational phase detection mechanism (35) at the time is the same as that of the plurality of hot water supply temperature selection switches (33a, b...)
Among them, there is a comparison circuit part (36El) that determines whether the setting phase corresponding to the hot water temperature selection switch designated as high temperature is selected for safety reasons or not, and a second
When the detection phase of the rotational phase detection mechanism (35) is the set phase corresponding to the hot water temperature selection switch with high temperature specification, the second rotational phase detection mechanism (35) detects the detection phase regardless of the hot water temperature specification. The motor (1
8) and an operating circuit section (36gz) for automatic reverse operation.

In other words, when the normal rotation of the motor (18) for stopping the hot water supply operation is completed, the hot water temperature selection switch (33a, b
) hot water supply temperature specification state (hot water supply temperature adjustment state)
If the temperature is on the high temperature side (higher temperature range than the setting) classified as having safety problems, the above-mentioned safety circuit (36E) is activated after normal rotation of the motor (18) to stop hot water supply operation is completed.
The motor (18) is automatically operated in reverse to automatically change the specified hot water temperature (hot water temperature adjustment state) to a temperature permitted for safety (safe low temperature range).
This eliminates the possibility of hot water being unexpectedly discharged at the start of the next hot water supply operation due to the user forgetting to change the hot water supply temperature to a lower temperature at the end of the previous high temperature water supply operation, thereby preventing burns. This is to prevent accidents.

[Third Embodiment] Next, a third embodiment of the present invention will be described based on FIGS. 11 and 12.

Figures 11 and 12 show the structure of the operating section of a hot water supply device such as a water heater. In the figures, (101) is a push-button operation tool for interrupting hot water supply, and (102) is a lever set for adjusting hot water temperature. It is an operating tool.

The operation mode for starting and stopping hot water supply using the hot water supply intermittent operation tool (101) is as follows:
) to the innermost position (B) against the protruding biasing force, the water heater enters the hot water supply start preparation state.

(0) Then, when the push operation on the hot water supply intermittent operation tool (101) pushed to the innermost position (B) is released, the hot water supply intermittent operation tool (101) is moved from the innermost position (B) to a predetermined position by the protruding biasing force. It returns to the holding position (C) where the dimension has returned and is held at that position (C), but the holding position (
In the operating tool return process up to C), the hot water supply apparatus starts the hot water supply operation, and the hot water supply operation continues while the operating tool is held in the holding position (C).

(c) Thereafter, when the hot water supply intermittent operating tool (101) located at the holding position (C) is pushed again in the hot water supply operation state, the releasing position (
Pushing to the release position (D) is allowed, and the holding of the hot water supply intermittent operating tool (101) is released by pushing to the release position (D).

Therefore, when the push operation on the hot water supply intermittent operating tool (101) that has been pushed to the release position (D) is released, the hot water supply intermittent operating tool (101) returns to its initial position, the protruding position (A), due to the protruding biasing force. , this protruding position (A)
During the operation tool return process up to this point, the hot water supply device is configured to stop the hot water supply operation.

That is, the configuration is such that hot water supply starts and hot water supply stops are alternately repeated by repeatedly pressing the hot water supply intermittent operation tool (101).

On the other hand, the lever set hot water temperature adjustment operating tool (102) is
It is linked to the hot water temperature adjustment section of the water heater using an appropriate mechanical or electrical connection structure, and as the hot water temperature adjustment operating tool (102) is operated to one side in the direction of movement, the hot water temperature decreases, and the temperature decreases to the other side. The temperature of the hot water becomes higher as you move it toward the side.

The movement path of the operating tool for adjusting the hot water temperature (102) is such that the operation state of the operating tool for adjusting the hot water temperature (102) does not enter a high temperature range (to the right of the safe upper limit temperature (Ts) position in the figure) higher than the setting. When the hot water supply temperature adjustment operation tool (102) is engaged with the rod part of the hot water supply temperature adjustment operation tool (102), the high temperature side (
The retaining member (103
) is biased by a spring (104) back toward the low-temperature side, which is the retaining side with respect to the operating tool rod, and the retaining member (103) is in a position along the operating tool moving path. The retaining member (103) is held at the displaced position moved together with the hot water temperature adjustment operating tool (102) against the biasing force of the return spring (104) by engaging with the teeth of the rack (105) provided at A locking protrusion (106) is provided.

The retaining protrusion (106) constitutes a so-called ratchet mechanism together with the rack (105), and the engaging member (106) constitutes a so-called ratchet mechanism.
03) to the high temperature side is caused by the protruding biasing spring (10
7), the engagement protrusion (106) swings and retires to the left in the figure to release the engagement with the teeth of the rack (105), while the return spring (104)
) The movement of the engaging member (103) to the low temperature side due to the biasing force of the protruding biasing spring (107) causes the protruding protrusion (106) to swing and retire to the right in the figure. By making the operation mechanically impossible, the rack (105
) This is prevented by maintaining the lock on the teeth.

Further, the rack (105) is located away from the engagement position (X) where the engagement projection (106) is engaged and the movement path of the engagement member (103) to prevent engagement with the engagement projection (106). The hot water supply intermittent operation tool (101) can be moved to the innermost value W(
B), the rack (105
) moves against the retaining spring (109) to the engagement position (
X) to the release position (Y) and operate, and
As the hot water supply intermittent operating tool (101) returns from the innermost position (B), the rack (105) is moved from the release position (Y) to the engagement position (X) by the biasing force of the holding spring (109). It is designed so that it returns to the position and is held at the engagement position (X).

That is, when the hot water temperature adjustment operating tool (102) is operated to a high temperature range higher than the setting, the engaging member (103), which moves toward the high temperature side, resists the biasing force of the return spring (104) and returns to the rack. (105) and the retaining protrusion (106), the hot water supply intermittent operation tool (101 ) is pushed to the innermost position (B), the rack (105) is accordingly displaced from the engagement position (X) to the disengagement position (Y), and the rack (105) and the engagement protrusion ( Since the engagement with the spring (106) is released, the retaining member (103) returns to the spring (
104) returns to the low temperature side, and during the return operation, the hot water supply temperature adjustment operating tool (102), which is in a high temperature range above the setting, is engaged with the retaining member (103) and reaches the safe upper limit. It is automatically returned to the temperature (Ts) position.

In summary, at the time of the hot water supply start operation using the hot water supply intermittent operation tool (101), the hot water supply temperature adjustment operation tool (102)
) is a safety mechanism that automatically changes the adjusted state of the hot water supply temperature to a safe low temperature range when the adjusted state of the hot water supply temperature is in a high temperature range higher than the set value.

[Other Examples]

Next, other examples will be listed.

(B) The timing for automatically changing the adjustment state of the hot water supply temperature to the safe low temperature range may be either when the hot water supply is stopped (at the time of the hot water supply stop operation or during the hot water supply stop period) or at the time of the hot water supply start operation.

(b) In order to automatically change the adjustment state of the hot water supply temperature by the operating tool for adjusting the hot water supply temperature to a safe low temperature range, a form that automatically changes the operating state of the operating tool for adjusting the hot water supply temperature itself, or the operating tool for adjusting the hot water supply temperature itself. Any form may be adopted in which only the adjustment state of the hot water supply temperature is automatically changed inside the device without changing the operating state of the device.

(c) In the preceding paragraph (b), if a configuration is adopted in which only the adjustment state of the hot water supply temperature is automatically changed inside the device without changing the operation state of the hot water supply temperature adjustment operating tool itself, the adjustment state of the hot water supply temperature It is better to provide a means for displaying.

(d) When hot water supply is stopped or at the time of hot water supply start operation, if the hot water supply temperature adjustment state by the hot water supply temperature adjustment operation tool is in a high temperature range above the setting, the hot water supply temperature adjustment state is automatically set to a safe low temperature. The structure of the safety means for changing the water supply temperature may be mechanical, electric, or fluid pressure. It is also possible to have a structure in which various types are combined as appropriate, such as by making the part that automatically changes the adjustment state of the hot water supply temperature based on the result mechanical.

(f) In order to improve usability when high-temperature hot water is repeatedly supplied, a separate means for canceling or blocking the automatic change function of the hot water supply temperature adjustment state by the above-mentioned safety means may be added.

(f) The destination temperature of the hot water temperature adjustment state that is automatically changed by the safety means is the boundary temperature between the high temperature range and the low temperature range above the setting (i.e., the safe upper limit temperature Ts in the above embodiment),
Alternatively, the temperature may be lower than the boundary temperature, and means may be provided to change the destination temperature or the boundary temperature as appropriate.

0) The specific operation type of the hot water supply intermittent operating tool and the hot water supply temperature adjustment operating tool may be any type, whether mechanical or electrical, and the hot water supply intermittent operating tool may be used for starting hot water supply. It may also consist of two operating tools: one for stopping hot water supply, and one for stopping hot water supply.

(H) The present invention is applicable to various types of water heaters, such as instantaneous water heaters and central heating type water heaters.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a block diagram of a stop-start instantaneous water heater, and FIG. 2 is a flowchart. 3 to 10 show a second embodiment of the present invention, FIG. 3 is an operational configuration diagram, FIG. 4 is an enlarged view of the bell crank portion, FIG. 5 is an enlarged sectional view of the regulating valve, and FIG. The figure is an internal configuration diagram of the stop type instantaneous water heater, FIG. 7 is a front view thereof, and FIGS. 8 to 10 are flowcharts, respectively. 11 and 12 show a third embodiment of the present invention, with FIG. 11 being an enlarged view of the operating structure and FIG. 12 being an enlarged side view of the same.

Claims (1)

[Scope of Claims] 1. A hot water supply device equipped with a hot water supply intermittent operating tool and a hot water supply temperature adjustment operating tool, wherein the water supply device is provided with a hot water supply intermittent operating tool, and when hot water supply is stopped by the hot water supply intermittent operating tool, or at the time of hot water supply starting operation by the hot water supply intermittent operating tool. . A water heater provided with a safety means for automatically changing the adjustment state of the hot water supply temperature to a safe low temperature range when the adjustment state of the hot water supply temperature by the operating tool for adjusting the hot water supply temperature is in a high temperature range higher than a set value. 2. The safety means is to automatically change the hot water temperature adjustment state after a set time has elapsed from the time when the hot water supply is stopped using the hot water supply intermittent operation tool, and if there is no hot water supply start operation within the set time. Claim 1, which disables the automatic change of the hot water supply temperature adjustment state when
The water heater described in section.