JPH0367951A - Hot-water supply temperature controller for hot-water supply apparatus - Google Patents

Abstract

PURPOSE:To prevent hot-water from spouting from a shower head even when a bath occupant forgets to operate a change-over device, by automatically changing over to a second temperature control circuit side, which compares an output of a hot-water temperature setter with an output of a temperature sensor, by an output of a bath sensor when the occupant goes in or out of a bathtub. CONSTITUTION:When an occupant goes in a bathtub B, a change-over switch 54 is changed over by an output of a pressure-change arithmetic circuit 1, and a hot-water set temperature of a second temperature control circuit 5b is given priority over that of a first temperature control circuit 5a by a bath sensor. This priority operation is effective within a time period set by a timer. Therefore, even in case a shower 27 in a bathroom is used within this time period, the hot-water is controlled at a hot-water set temperature set by a hot-water temperature setter 53 equipped on an auxiliary operating board C2. As a result, high temperature hot-water is prevented from spouting from the shower 27 even when the hot-water temperature is set for a high temperature by a main control board C1.

Description

[Detailed Description of the Invention] [Field of Application and Summary of the Invention] The present invention relates to a remote hot water outlet temperature control device for a water heater that can supply hot water to multiple locations, including a main hot water supply location such as a kitchen. When hot water is supplied to a bathroom, the setting of the hot water temperature using the sub-operation panel installed in the bathroom takes priority over the setting of the hot water temperature using the main control panel installed at the main hot water supply location. This prevents abnormally high temperature hot water from spewing out during use, and also prevents such inconvenience caused by forgetting to operate the switching device.

[Prior Art and its Problems] Recent instantaneous water heaters are equipped with hot water supply circuits that can supply hot water to multiple locations, and typically, hot water is supplied to at least the kitchen and bathroom. In addition, this type of water heater is equipped with a remote control operation panel, as shown in Figures 6 and 7.
As shown in the figure, it is configured to be remotely controllable from two locations: a main operation panel (C3) installed in the kitchen and a sub-operation panel (C2) installed in the bathroom.

Both of these operation panels are equipped with a hot water temperature setting device to adjust the hot water temperature, so that the hot water temperature can be adjusted individually from each operation panel. In order to adjust the hot water temperature, the output of the temperature sensor (20) that detects the temperature on the outlet side of the heat exchanger (2) is compared with the output of each temperature setting device, and a predetermined output is set according to the comparison result. and a gas proportional valve (50) that adjusts the amount of gas supplied to the gas burner (29), which serves as a heating source for the heat exchanger (2), based on the output of the temperature control circuit (5). As shown in FIG. The first temperature control circuit (5a) compares the output of the gJ temperature setting setter 2) with the output of the temperature sensor (20), and the hot water temperature setting device (53'fl force and temperature sensor) of the sub-operation panel (C2). (20) is used in combination with the second temperature control circuit (5b) which compares the output of the first temperature control circuit (5a) and the second temperature control circuit (5b).
A switch (54) switches the output from the temperature control circuit (5b).
) of the gas proportional valve (50)
1).

In this case, by switching the changeover switch (54), the hot water temperature will be maintained according to the output from one of the temperature control circuits, or normally the temperature of the hot water used in the bathroom will be the same as that used in the kitchen. lower than the temperature of it. For example, hot water at around 80 degrees Celsius is sometimes used in the kitchen, and hot water at around 40 degrees Celsius at most is used in the bathroom. Therefore, the changeover switch (54) is installed on the main operation panel (
If you use the shower in the bathroom while connected to the C1) side, hot water may come out at a high temperature as described above. In order to avoid such inconvenience, conventionally, the changeover switch (54) was placed on the sub-operation panel (C2).
We are trying to arrange it on the side.

As a result, the changeover switch (54) can be changed on the bathroom side, and when a bather uses the shower, the hot water temperature can be set to the desired temperature regardless of the temperature set on the main control panel (C1) side. , the above-mentioned disadvantages are alleviated.

However, even with this conventional type, the changeover switch (54)
If you are unable to avoid forgetting to operate the switch and use the shower with the changeover switch (54) set to the main control panel (CI), hot water will spray out depending on the temperature set on the main control panel (C1) and may cause burns. There are things I do.

The present invention provides hot water supply piping for the hot water supply circuit of such an LR candy water heater to a main hot water supply place such as a kitchen and a bathroom, and a main operation panel (C1) in the main hot water supply place and a sub-operation panel (C2) in the bathroom. A temperature sensor (20) is installed at each of the hot water supply circuits, and each operation panel is equipped with a hot water temperature setting device for setting the hot water temperature, and the temperature sensor (20) detects the temperature on the outlet side of the heat exchanger (2) in the hot water supply circuit.
The output of the heat exchanger (
It is equipped with a temperature control circuit (5) that outputs a control signal for controlling the heating capacity of the heating source in step 2) to the output device, and this temperature control circuit (5) is connected to the hot water temperature setting device of the main operation panel (C1). (52
) and the output of the temperature sensor (20), and the output of the hot water temperature setting device (53) on the side of the sub-operation panel (C2) and the output of the temperature sensor (20). A hot water outlet temperature control device for a water heater, comprising a second temperature control circuit (5b) for comparing the two temperature control circuits, and inputting the output from each temperature control circuit to the output device separately by a switching device, The objective is to reliably prevent accidents caused by forgetting to operate the changeover switch (54) in the bathroom.

[Technical means] The technical means of the present invention taken to solve the above problem is to detect whether a person enters the bathtub (B) or to detect that a person enters the bathtub (B). The switching device is switched from the first temperature control circuit (5a) to the second temperature control circuit (5b) according to the output of the bathing sensor, and the output of the second temperature control circuit (5b) is detected. a timer (T) which inputs the signal into the output device with priority over the output of the other first temperature control circuit (5a), which is brought into conduction by the bathing sensor, and which sets the switching time of the switching device to a predetermined time; It is J that has been established.

[Effect] The above technical means of the present invention operates as follows.

When the bather enters or leaves the bathtub, the switching device is switched by the output from the bathing sensor, and the output from the second temperature control circuit (5b) is input to the output device for controlling the heating source. . As a result, when taking a shower in the bathroom while taking a bath, the control output of the temperature control circuit (5) will be the one set by the second temperature control circuit (5b), and the control output of the temperature control circuit (5) will be the one set by the second temperature control circuit (5b). Even if the set temperature is in the high temperature range, the second temperature control circuit (5b) maintains the set temperature.

As mentioned above, the switched state of the switching device is maintained for a certain period of time set by the timer from the time when the output from the bathing sensor is input, and when this set time has elapsed, the switching device returns to the initial state, that is, First temperature control circuit (5
It is reset to the state returned to side a).

[effect] Since the present invention has the above configuration, it has the following unique effects.

When a bather enters or exits the bathtub, the switching device is automatically switched to the second temperature control circuit (5b) based on the output from the bathing sensor. Accidents caused by spouting of high-temperature water can be prevented.

Since the switching device switches to the second temperature control circuit (5b) side based on the output of the bathing sensor that detects when a bather enters the bathtub, the switching device switches when a person enters the bathroom for purposes other than bathing. Inconveniences such as switching can be prevented.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

The device of this embodiment is a so-called bathtub with a water heater equipped with a bath sensor, which has a hot water supply function and a function of circulating and heating the bathtub (B). The hot water supply circuit (21) on the outlet side of the heat exchanger (2) can be connected to the kitchen, washroom, and bathroom, and the hot water supply function can also be used to automatically fill the hot water supply system. Operation panel (C1) and sub-operation panel (C
2) makes it possible to control the hot water temperature. A pressure sensor (S) for detecting water level is incorporated into a part of the automatic hot water filling device, and this pressure sensor (S) also functions as a component of a bathing sensor.

The temperature control circuit (5) is configured to include a first temperature control circuit (5a) on the main operation panel (C+) side and a second temperature control circuit (5b) on the sub operation panel (C2) side. As shown in Figure 2, the control circuit includes a temperature sensor (20) such as a circstar that detects the temperature on the outlet side of the heat exchanger (2).
, a hot water temperature setting device, and a comparison calculation circuit that compares and calculates the output of the temperature sensor (2o) and the output from the hot water temperature setting device.
) is input to a drive circuit (51) for a gas proportional valve (50) that controls the amount of gas supplied to the burner that heats the gas.

The first temperature control circuit (5a) compares the output from the temperature sensor (20) with the output of the hot water temperature setting device (52) on the main operation panel (C1) side, and the other second temperature control circuit (5b) The output from the temperature sensor (20) is compared with the output from the hot water temperature setting device (53) on the side of the sub-operation panel (C2), and these outputs are sent to the drive circuit (51) via the changeover switch (54). has been entered.

Next, as shown in FIG. 1, the automatic hot water filling device connects the hot water filling circuit (22) branched from the hot water supply circuit (21) on the outlet side of the hot water heat exchanger (2) to a circulation heating circuit. A water filling circuit (22) is connected to a circulation heating circuit (3), and a water filling circuit (22) is connected to a water filling circuit (22), in which a water filling valve (23) and a vacuum break valve (24) are inserted. ) with a pressure sensor (S) connected in communication with the pressure sensor (S).
), as shown in Figure 2, the output of the comparison calculation circuit (4)
has been entered. Note that this pressure sensor (S) is a type of sensor that constantly outputs detected pressure. The output from the water level setting device (41) is always input as the other input to the comparison calculation circuit (4), and the output from the water level setting device (41) and the output from the pressure sensor (S) is compared by the comparison calculation circuit (4), and when the output from the pressure sensor (S) matches the set value by the water level setting device (41), the comparison calculation circuit (4) outputs a constant output signal. do. The output from this comparison calculation circuit (4) is input to a switch device (43) which is always on, and this switch device (43) is inserted in series with the depletion valve (23). In addition, these switch devices (43
) and the depletion valve (23) are made conductive by turning on the depletion switch (25).

Further, the output of the pressure sensor (S) is also input to the pressure change calculation circuit (1), and the combination of this pressure sensor (S) and the pressure change calculation circuit (1) functions as a bathing sensor. . Then, this pressure change calculation circuit (1
) for? The degree of pressure change corresponding to the water level change in the bathtub (B) when the bathtub (B) is full is greater than the degree of pressure change when the bathtub (B) is filled with water.
The output of the reference value output means (11) that outputs the pressure change degree reference value is configured to input a specific degree of pressure change whose degree of change is smaller than the degree of change in the water level when the water enters the water. is input to the pressure change calculation circuit (1) together with the output of the pressure sensor (S), and the output from this pressure change calculation circuit (1) is sent to the relay (R) whose output contact is the changeover switch (54) described above. ) is applied to the base of a switching transistor (10) connected in series with. In addition, the output contact of this relay (R) is
It is normally connected to the circuit on the first temperature control circuit (5a) side, and when the output from the pressure change calculation circuit (1) is applied to the base of the switching transistor (10),
When the relay (R) is conductive, the output contact 1 is switched to the 27th crystallinity control circuit (5b) side.

In addition, in this embodiment, the pressure change calculation circuit (1)
As shown in Fig. 3, there is a comparison calculation circuit (12) into which the output from the pressure sensor (S) and the output from the reference value output means (11) are input, and the output from this comparison calculation circuit (12). Switching transistor (13) applied to the base
, a timer (14) connected in series with this switching transistor (13), a self-holding circuit (16) into which one output switch of this timer is input, and a reference voltage application circuit (in which the other output switch is inserted). 15), and the voltage applied to this reference voltage application circuit (15) is applied to the base of the switching transistor (10).

In this embodiment, when the hot water filling operation is performed and the hot water filling switch (25) is turned on, water filling is automatically started, and when the output of the pressure sensor (S) reaches the set water level, the comparison calculation circuit ( The output of 4) automatically stops the 7 easy bow length.

Also, when a bather enters the bath No. 4 (B), at this time the changeover switch (54) is switched by the output of the pressure change calculation circuit (1), and the output of the bath sensor switches to the No. 27 bath. The hot water temperature setting by the control circuit (5b) has priority over that of the other first temperature control circuit (5a). The time for this priority operation is the time set in the timer (14). Therefore, even if you use the shower (27) in the bathroom during this time, the water temperature will be controlled to the temperature set by the hot water temperature setting device (53) provided on the sub-operation panel (C2), and the main operation Even if the hot water temperature is set at a relatively high temperature on the panel (C1) side, the inconvenience of hot water at this high temperature spewing out from the shower (27) can be prevented.

As a pressure change calculation circuit (1) that is distantly related to the same purpose,
It is also possible to adopt a configuration as shown in FIG.

In this device, the output from the pressure sensor (S) is input to a differentiating circuit (17), and the output from this differentiating circuit (17) is input to a timer (18) via an inverting circuit. The output causes the changeover switch (54) to input to the relay (R) shown in Fig. 2 with the output contact, and the relay (R) is turned on for the set time of this timer (18).
R) is configured to be in a conductive state. Here, the differential circuit (17) uses a resistor and a capacitor, and by setting these resistance values and capacitances to predetermined values, it is possible to detect a change in water pressure when a bather enters the bathtub (B). Needless to say, the configuration is such that a constant output is obtained when the bather enters the bathtub (B), and a constant "positive output" is produced when the bather exits the bathtub (B). A constant "negative output" will be output.

Therefore, in a device that employs the pressure change calculation circuit (1) having this configuration, priority is given to the hot water temperature control operation by the second temperature control circuit (5b) for a fixed period of time after the bather leaves the bath at (B). becomes.

Next, it is also possible to use the pressure change calculation circuit (1) as one of the starting signals for the heat retention device (19) using a reheating device for controlling the temperature of the hot water in the bath 4ff (B). For this purpose, as shown in FIG. 5, the output of the differentiating circuit (17) is input to the flip-flop circuit (F), and the output from this flip-flop circuit (F) is input to the heat insulating device (19). Just let it happen.

With this configuration, the warming operation by the warming device (19) is activated when a bather enters the bath 441 (B), and the warming operation is stopped when the bather leaves the bathtub (B). I will do it. Naturally, this heat retention operation is to bring the burner (30) corresponding to the heat exchanger (31) for circulating heating inserted into the circuit of the circulating heating circuit (3) into a combustion state. The combustion of the burner (30) is controlled by the output of the hot water temperature detection device (32) provided in (3), and when the temperature detected by the hot water temperature detection device (32) reaches the set temperature, the burner (30) starts to burn. will be stopped. Then, the positive output from the differentiating circuit (17) sets the flip-flop circuit (F), and the output of this flip-flop circuit (F) puts the warming device (19) in the state where it performs the above operation, and the differentiating circuit ( The flip-flop circuit CF) is reset by the inverted negative output from 17), and the heat insulating device (19)
The above-mentioned operation of will be stopped.

In addition, in controlling this heat retention operation, if the heat retention operation is made to proceed before the time when the bather takes a bath in the bath 5 (B), the heat retention control effect is further improved. This is because the warming operation begins before entering the bathtub (B). For this purpose, in addition to the above-mentioned bathing sensor, a sensor for detecting entry into the bathroom or a sensor for detecting entry into a changing room near the bathroom may be used to perform the heat-retaining operation.

Further, the anti-freezing operation can also be controlled by the output of the bathing sensor. As an antifreeze operation, there is a method of forcibly circulating the hot water in the bathtub at regular intervals, but this type of antifreeze operation is not necessary during bathing. Therefore, if the anti-freezing operation control circuit is made non-conductive when the bather enters the 6-power bath (B), and the control circuit is made conductive when the bather leaves the bathtub (B), there will be no waste. Forced circulation can be prevented.

Furthermore, it goes without saying that a water level sensor or a water level gauge other than a pressure sensor can be used as the bathing sensor in the above embodiment.

[Brief explanation of drawings]

6. Fig. 1 is an overall diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of its electric circuit diagram, Fig. 3 is a detailed diagram of the pressure change calculation circuit (1), and Fig. 4 is a pressure change calculation circuit. FIG. 5, an explanatory diagram of another embodiment of (1), shows the pressure change. (B) ・ ・ ・ Bath 4 Sodium Carbonate (S) ... Pressure sensor (1) ... Pressure change calculation circuit

Claims (2)

[Claims] (1) The hot water supply circuit of the water heater is connected to the main hot water supply area such as the kitchen and the bathroom, and the main operation panel (C_1
) and a sub-operation panel (C_2) in the bathroom.
Each of these operation panels is equipped with a hot water temperature setting device for setting the hot water temperature, and the output of the temperature sensor (20) that detects the temperature on the outlet side of the heat exchanger (2) in the hot water supply circuit and the hot water temperature. The temperature control circuit (5) is equipped with a temperature control circuit (5) that compares the output of the setting device and outputs a control signal for controlling the heating capacity of the heating source of the heat exchanger (2) to the output device.
) is the first temperature control circuit (5a) that compares the output of the hot water temperature setting device (52) of the main control panel (C_1) and the output of the temperature sensor (20), and the hot water temperature setting of the sub-operation panel (C_2) side. Vessel (53
) and a second temperature control circuit (5b) that compares the output of the temperature sensor (20) with the output of the temperature sensor (20), and the output from each temperature control circuit is inputted to the output device separately by a switching device. In the hot water outlet temperature control device of the water heater, the switching device is configured to detect that a bather has entered the bathtub (B), or to detect that a bather has entered the bathtub (B) and then exited the bathtub (B). The switching device is switched to the first
Switching from the temperature control circuit (5a) to the second temperature control circuit (5b) side, and inputting the output of the second temperature control circuit (5b) with priority over the output of the other first temperature control circuit (5a). A hot water outlet temperature control device for a water heater, comprising a timer (T) that is brought into conduction by the bathing sensor and sets the switching time of the switching device to a predetermined time. (2) The bathing sensor includes a pressure sensor (S) that detects the pressure corresponding to the water level in the bathtub, and a pressure that inputs the output from this pressure sensor and outputs a predetermined output when a sudden change in the output occurs. 2. The hot water outlet temperature control device for a water heater according to claim 1, further comprising a fluctuation detecting means.