JPH0154624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention can perform general hot water supply for washrooms, kitchens, showers, etc., and high-temperature hot water supply for bath reheating. Means for automatically and reversibly switching the amount of water supplied to a water heating heat exchanger from large to small based on switching from high temperature hot water supply to high temperature hot water supply, and based on switching of the switching operation tool from general hot water supply to high temperature hot water supply , a switching valve that can be freely switched between a first state in which the heat exchanger is connected to a general hot water supply flow path with an on-off valve and a second state in which it is connected to a high temperature hot water supply flow path is automatically switched to a second state; On the other hand, the switching valve is kept in the second position until the hot water temperature from the heat exchanger falls to the set temperature based on the switching from high-temperature hot water supply to general hot water supply using the switching operation tool.
means for automatically switching the switching valve to a first state when the temperature of the hot water discharged from the heat exchanger becomes equal to or lower than a set temperature in a state where the temperature of hot water discharged from the heat exchanger is maintained in the normal hot water supply state and the hot water supply state, respectively The present invention relates to an instantaneous hot water supply device that can switch between general hot water supply and high temperature hot water supply, and is provided with a means for automatically adjusting the amount of heating for the heat exchanger so that the hot water supply temperature is set at a hot water supply temperature of .

In this type of instantaneous hot water heater that switches between general hot water supply and high temperature hot water supply, even if the hot water supply switching operation tool is switched from high temperature hot water supply to general hot water supply, the amount of water supplied to the heat exchanger increases due to the switching, and the heat exchange is interrupted. The switching valve remains in the second state as long as the temperature of the hot water discharged from the vessel does not drop to the set temperature, and only when the temperature of the discharged water falls to the set temperature does the switching valve switch to the second state to enable general hot water supply. 1 state, so after switching the operating tool to the general mode, when opening the on-off valve such as a switch to supply general hot water, always set the hot water temperature to a temperature that does not cause burns, etc. to ensure safe use. However, if the switching valve is configured to be switched only via the operating tool as in the past, if you try to interrupt hot water supply to perform general hot water supply, the switching of the operating tool will be difficult. However, it has the disadvantage that, for example, it is extremely inconvenient to use due to the relationship with the installation position of the operating tool.

In view of these conventional drawbacks, the present invention has an object to make it possible to use the general hot water supply in interrupting the high temperature hot water supply very conveniently in terms of operation.

The characteristic configuration of the instant hot water heater of the present invention, which is designed to achieve the above object and which switches between general hot water supply and high temperature hot water supply, includes means for detecting the opening operation of the opening/closing valve in the high temperature hot water supply state, and based on this detection, The present invention is further provided with means for automatically switching the switching valve from the second state to the first state in a state that has priority over the switching operation tool, as described above.

The operation of the present invention having the above-mentioned characteristic structure is as follows.

Even if the operating tool is operated for high-temperature hot water supply, simply opening the on-off valve can switch the switching valve from the second state to the first state and transition to general hot water supply, and simply closing the on-off valve can switch the switching valve It is possible to switch from the first state to the second state and return to high temperature hot water supply. Moreover, when switching to general hot water supply by opening the on-off valve in the high temperature hot water supply state, the hot water output from the heat exchanger is similar to the transition from high temperature hot water supply to general hot water supply by switching the operating tool to general hot water supply. The switching valve is held in the second state until the temperature falls to the set temperature, and hot water is prevented from coming out.

Therefore, the present invention can easily interrupt general hot water supply during high temperature hot water supply by simply operating the on-off valve.
In addition, it has been achieved that it can be carried out safely and has very convenient effects in practical use.

Embodiments of the present invention will be described below with reference to FIG.

1 is a water heating heat exchanger of the Finch-Ube type, and the water supply channel 2 to this is turned on by water flow generation.
A water flow switch 3, a water governor 4, and a water flow control valve 6 that is driven by an electric motor 5 to change the water supply amount in three stages are interposed. It is provided.

9 is a general hot water supply flow path _a1 to a door 10 (an example of an on-off valve) installed in a bathroom, kitchen, etc., and the hot water outlet path 7
and the hot water outlet path ₇ is connected to the high temperature hot water supply flow path a2 to the hot water jetter 12 provided in the bathtub 11.
It is a rotary type switching valve that is switched to a second state through an electric motor 13, in which the water supply is connected to a second state, and a second water flow switch 14 that is turned on when a water flow is generated is interposed in the general hot water supply flow path _a1 . High temperature hot water supply channel
A ₂ is provided with a vacuum breaker 15 for preventing backflow.

Reference numeral 16 denotes a heating burner of the heat exchanger 1, and a fuel gas supply path 17 to the heating burner is connected to a safety valve 18 using a solenoid valve and a main valve 19 using a solenoid valve.
A gas governor 20 and a proportional valve 21 are interposed. 22 is a spark plug, and 23 is a flame rod for detecting the presence or absence of burner combustion.

24 is the water flow control valve 6 and the general hot water supply flow path a ₁
This is a bypass path interposed between the water flow control valve 6 and the water flow control valve 6, which opens when the water flow control valve 6 is in the small and medium states, and opens when the water flow control valve 6 is in the large state. When it closes.

Therefore, when the switching valve 9 is in the first state and the click switch 10 is opened, both water flow switches 3 and 14 are turned on, and the switching valve 9 is turned on.
is in the second state, the water flow switch 3
ON, when the switching valve 9 is in the second state, the water flow control valve 6 is in the small and medium states, and the lock 10 is open, the second water flow switch 14 is turned on.
turns on.

Reference numeral 25 denotes an operation panel installed in the melting chamber or the like, and this is provided with an operation switch 26, a temperature setting knob 27, and a hot water supply changeover switch 28. 29
is a control panel, and the control contents are listed below.

(1) Enable hot water supply by turning on the operation switch 26.

(2) By turning on the water flow switch 3, the safety valve 18 and the main valve 19 are opened, and
Activate the spark plug 22 and turn on the water flow switch 3.
When the main valve 19 is turned off, the main valve 19 is closed.

(3) When the presence of the flame rod 23 is detected, the safety valve 18 is held open, and when the presence of the flame rod 23 is detected, the safety valve 18 is closed.

(4) general hot water supply position P ₁ of the changeover switch 28;
Based on the switching to the pouring position P ₂ and the reheating position P ₃ , the water flow control valve 6 is immediately switched to the large state, medium state, and small state, respectively.

(5) Based on the switching of the changeover switch 28 to the general hot water supply position _P1 , if the temperature detected by the thermistor 8 is higher than the set temperature for general hot water supply set by the knob 27, the changeover valve 9 is turned off. While maintaining the second state, if the detected temperature is equal to or lower than the set temperature, the switching valve 9 is switched to the first state.

(6) The switching valve 9 is switched to the second state based on the switching of the switching switch to the pouring position P ₂ and the reheating position P ₃ .

(7) Under the condition that the changeover switch 28 is at the pouring position P ₂ and the reheating position P ₃ , the second water flow switch 14 is turned ON to switch the water flow control valve 6 to the large state, while the thermistor 8 is turned on. When the detected temperature falls to the set temperature while the switching valve 9 is held in the second state until the detected temperature falls to the set temperature for general hot water supply,
By switching the switching valve 9 to the first state and turning off the second water flow switch 14, the water flow control valve 6 and the switching valve 9 are returned to their original state.

(8) Based on the temperature detected by the thermistor 8, when the water flow control valve 6 is in the large state, the water outlet temperature is set at the temperature set by the knob 27, and the water flow control valve 6 is in the medium state. , when in the small state, each proportional valve 21 is operated so that the outlet temperature becomes the respective fixed set temperature.

Therefore, according to the configuration of the above embodiment, if (a) the switch 10 is opened with the changeover switch 28 switched to the general hot water supply position _P1 , (b) the changeover switch 28 is switched to the hot water pouring position _P2 . In this case, (c) selector switch 28
In any case where the burner is switched to the additional firing position _P3 , the water flow switch 3 is turned on and the burner 16 is ignited.If the burner 16 is not ignited, that is, in the event of a failure, the safety valve 18 closes, Fuel gas leakage from burner 16 is prevented. In case (a), general hot water supply is carried out by supplying hot water controlled to a set temperature from the callan 10, and in case (b), hot water is supplied at a temperature controlled to a set temperature (40 to 50).
℃), and pouring hot water into the bathtub 11 from the jetter 12 in an amount that is slightly smaller than that of general hot water supply; in the case of (c), the set temperature ( Reheating is performed in which hot water is controlled at a temperature of 88 to 98° C.) and is supplied into the bathtub 11 from the ejector 12 at a smaller flow rate than when hot water is poured. Also, if you open the trigger 10 during pouring or reheating, the changeover switch 28
Regardless of whether the molten metal is at the pouring position P ₂ or the reheating position P ₃ , the second water flow switch 14 is turned ON, and the water flow control valve 6 is switched to the large state and the switching valve 9 is switched to the first state. The hot water is controlled to the set temperature for 10 minutes.
General hot water supply is performed, and when the flush 10 is closed during this general hot water supply, the second water flow switch 14 is turned OFF to return to hot water pouring or reheating. In other words, interrupt general hot water supply during pouring or reheating can be performed simply by opening and closing the collar 10. Furthermore, switching from hot water pouring and reheating to general hot water supply by switching the changeover switch 28 to the general hot water supply position _P1 , and
When pouring hot water or switching to interrupt general hot water supply during reheating, the water flow control valve 6 is switched to the large state, and the proportional valve 21 is operated to maintain the temperature set by the knob 27. Until the outlet temperature falls to the set temperature, the switching valve 9 is in the second state in which the high-temperature hot water for pouring and reheating in the heat exchanger 1 is discharged to the high-temperature hot water supply flow path a ₂ side. When the hot water temperature drops to the set temperature, the switching valve 9 is switched to the first state, so high temperature hot water for pouring and reheating is not supplied from the drain 10.

FIGS. 2 and 3 each show another embodiment.

Another embodiment shown in FIG. 2 is configured such that the switching valve 9 is connected to the general hot water supply flow path a ₁ even in the second state, and the switching valve 9 is connected to the bypass path 24 of the general hot water supply flow path a ₁ . A check valve 30 and a temperature buffer 31 that allow flow only to the connection part b side are installed in the upstream and downstream parts of the connection part b, respectively, and the other points are as follows. Similar to the example. The difference between another embodiment shown in FIG. 3 and the other embodiment shown in FIG.
3 is interposed, and a water solenoid valve 36 that closes during reheating is interposed in the water supply channel portion 35 with one water governor 32 interposed therein, and the bypass passage 24 is connected to the water supply channel portion 35, and the bypass path 2
4 is equipped with a solenoid valve 37 that opens during pouring and reheating,
By opening and closing the water solenoid valve 36, the water supply amount is switched between a large water supply amount for general hot water supply and pouring, and a small water supply amount for reheating, and the bypass solenoid valve 3
7 opens, the second water flow switch 14 is turned on when the switch 10 is opened during pouring and reheating. Note that the bypass path 24 may be connected to the flow path _a1 between the temperature buffer 31 and the second water flow switch 14, as shown by the imaginary line, and in FIG. , the water flow switch 3 is installed on the downstream side of the water flow rate adjusting section provided with both water governors 32 and 33, but the water flow switch 3 may be installed on the upstream side as shown by the imaginary line.

In both of the embodiments described above, when the cooker 10 is opened during pouring and reheating, a portion of the hot water from the heat exchanger 1 is transferred to the general hot water supply flow path via the switching valve 9 in the second state. The low-temperature hot water that is diverted to the a ₁ side and mixed with water from this diversion channel and the bypass channel 24 is
Before the hot water temperature from the heat exchanger 1 falls to the set temperature and the switching valve 9 switches to the first state, the switch 10
Since hot water can be supplied from the tank, general hot water can be supplied earlier than in the embodiment.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment, and FIGS. 2 and 3 are schematic diagrams showing different embodiments. 28... Hot water supply switching operation tool, 1... Heat exchanger for water heating, 10... Opening/closing valve, a ₁ ... General hot water supply flow path,
a ₂ ... High temperature hot water supply flow path, 9 ... Switching valve, 17 ...
Water supply channel, 24... Bypass channel, 14... Water flow switch.

Claims (1)

[Scope of Claims] 1. means for automatically and reversibly switching the amount of water supplied to the water heating heat exchanger 1 from large to small based on the switching of the hot water supply switching operation tool 28 from general hot water supply to high temperature hot water supply; A first connecting the heat exchanger 1 to a general hot water supply flow path a ₁ equipped with an on-off valve 10 based on the switching operation tool 28 from general hot water supply to high temperature hot water supply.
The switching valve 9, which can be freely switched between the state and the second state in which it is connected to the high-temperature hot water supply channel _A2 , is automatically switched to the second state, while the switching operation tool 28 is switched from high-temperature hot water supply to general hot water supply. Based on this, the switching valve 9 is held in the second state until the temperature of hot water discharged from the heat exchanger 1 falls to the set temperature, and when the temperature of hot water falling below the set temperature, the switching valve 9 is means for automatically switching the temperature to the first state; and automatically controlling the heating amount for the heat exchanger 1 so that the temperature of the hot water discharged from the heat exchanger 1 becomes the hot water supply setting temperature in each of the general hot water supply state and the high temperature hot water supply state. In the instantaneous hot water supply apparatus that switches between general hot water supply and high temperature hot water supply, the instant hot water supply apparatus is equipped with a means for detecting the opening operation of the on-off valve 10 in the high temperature hot water supply state, and a means for detecting the opening operation of the on-off valve 10 in the high temperature hot water supply state, and a means for detecting the opening operation of the on-off valve 10 in the high temperature hot water supply state; This instantaneous hot water supply device is provided with means for automatically switching the switching valve 9 from the second state to the first state in a state that takes priority over 28. 2. The means for detecting the opening operation of the on-off valve 10,
Between the water supply channel 17 to the heat exchanger 1 and the general hot water supply channel _a1 , the on-off valve 10 is operated when the heat exchanger 1 is connected to the high temperature hot water supply channel _a2 . A bypass flow path 24 is provided to generate a water flow in the general hot water supply flow path a ₁ when the water flow switch 14 is opened _.
The instantaneous hot water supply device that can switch between general hot water supply and high-temperature hot water supply according to claim 1, which is a means for interposing a hot water supply system.