JPS6124834Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a forced circulation bath pot using a pump.

(Prior art) In conventional forced circulation bathtubs of this type, poor circulation occurs, such as pump aerodynamics when air in the circulation path enters the pump casing and is not discharged, and the circulation path is clogged with dirt. In 1977, a system was developed to detect and notify when the
This is shown in Publication No. 70134. Furthermore, it has been known that a temperature sensor is used to detect when the bath is boiling, and a buzzer is used to notify the user of the temperature.

(Problem that the invention aims to solve) In these conventional forced circulation bathtubs, if the buzzer notifies both the boiling of the bath and the malfunction of the pump, it is difficult to distinguish between the boiling of the bath and the malfunction of the pump. This is inconvenient, and a problem arises in that separate notification devices must be provided for each.

The present invention solves the above-mentioned problems and notifies the overheating of the bathtub and malfunction of the pump with a single alarm buzzer, and also makes it possible to identify the above-mentioned notifications, simplifying the configuration and improving usability. The purpose is to provide a forced circulation bath kettle that achieves the following.

(Means for Solving the Problems) In order to achieve the above object, the present invention has the following configuration. That is, a gas burner that heats the heat exchanger, an outgoing pipe and a return pipe that connect the heat exchanger and the bathtub, a pump installed in the outgoing pipe, a flowing water detector, a temperature detector, an operation switch, and a notification buzzer. It has a remote control device equipped with
Both an intermittent oscillation circuit and a continuous oscillation circuit are connected to the notification buzzer, and the intermittent oscillation circuit is activated by the output when the thermo circuit controlled by the temperature sensor boils, and the flowing water detector is activated within a set time after the pump is energized. The continuous oscillation circuit is activated by the undetected output.

(Function) The present invention has such a configuration, and in the event of an abnormality in which the flowing water detector does not detect flowing water within a set time after the pump is energized, the continuous transmission circuit is activated when the time is up, the notification buzzer sounds continuously, and the pump is activated. Informs you of malfunction. When the bath is boiling, a change in the resistance value of the temperature sensor causes the comparator in the thermo circuit that compares the set temperature and the detected temperature to reverse to the high output side, and the output when the bath boils is used to activate the continuous oscillation circuit. is activated, causing the notification buzzer to sound intermittently.

(Example) The present invention will be described below based on an example of a diagram in which the present invention is implemented in a one-can, two-circuit bathtub with hot water supply.

1 is the main body of a bathtub with a 1-can, 2-circuit water heater, and inside the main body 1 is a can body 5 with integrally attached fins 4 that serve as a hot water supply heat exchanger 2 and a bathtub heat exchanger 3.
and a common gas burner 6 for heating the can body 5. 7 is an igniter, and 8 is a flame detector. A water governor 10 and an accumulator 11 are installed in the water supply channel 9 that supplies water to the hot water heat exchanger 2, and a hot water tap 13 is provided at the end of the hot water supply channel 12, and a hot water supply tap 13 is provided at the end of the hot water supply channel 12, and a hot water supply tap 13 is provided at the end of the hot water supply channel 12. A temperature detector 14, which will be described later, is attached. The bath heat exchanger 3 has a bathtub 15 and an outgoing pipe 16.
The outgoing pipe 16 is connected to a return pipe 17, and the outgoing pipe 16 is provided with a pump 18 for performing circulation, a flowing water detector 19, and a temperature detector 20 composed of a negative characteristic type thermistor. 21 is a gas supply path 22 of the gas burner 6
The temperature detected by the temperature detector 14 and the set temperature are compared and amplified by a gas proportional valve installed in the valve, and the valve opening degree is controlled by a signal proportional to the temperature difference. 24 is an ON/OFF type solenoid valve provided upstream of the gas proportional valve 21. Reference numeral 25 denotes a remote control device installed in a kitchen or the like, and is provided with the temperature regulator 23, a notification buzzer 26, which will be described later, and an operation switch 27.

FIG. 2 shows an electric circuit diagram in which a notification buzzer 26 and a driving transistor 31 of the notification buzzer 26 are connected in series between the power supply lines at the front stage of a push-button operation switch 27.
A self-holding circuit 33 for closing the bias circuit 32 of the switch 27, a series circuit of a relay 34 for driving the pump 18 and a transistor 35 for driving the relay 34, and a series circuit between the power supply lines at the latter stage, and the transistor 35 are connected to each other. A drive circuit 36 is connected to the drive circuit 36, and a transistor 38 supplied with power via an on/off switch 37 of the flowing water detector 19 is connected to control each load of the above-mentioned igniter 7, gas proportional valve 21, and electromagnetic valve 24. A thermo circuit 41 having a control circuit 39 that performs safe operation during ignition and a comparator 40 that compares the temperature detected by the temperature detector 20 and the set temperature of the temperature regulator 23 and inverts the output is connected between the power lines. are doing. A continuous oscillation circuit 43 and an intermittent oscillation circuit 44 are connected in series to the input circuit 42 of the transistor 31 via a diode 45. The drive circuits 46 and 47 of these oscillation circuits 43 and 44 are connected between the power supply lines before the operation switch 27 via a constant voltage circuit 48. Continuous oscillation circuit 43
The drive circuit 46 includes a resistor 49 and a capacitor 50.
A first timer 51 consisting of
The driving circuit 47 of the intermittent oscillation circuit 44 includes a transistor 52 that becomes conductive when the time-up of oscillation occurs.
The second timer 57 includes a resistor 55 and a capacitor 56 connected in series between the output terminal of the transistor 53 and the base of the transistor 53. In addition, the connection point between the resistor 49 and the capacitor 50 of the first timer 51 in the drive circuit 46 is connected to the transistor 38 and the collector through circuits 58 and 59, and the connection point is connected through the circuits 58 and 60 to open when the self-holding circuit 33 is activated. It is connected to the ground side power supply line via a switch 61. Further, the collector of the transistor 52 in the drive circuit 46 is connected to the circuit 3 by a circuit 66.
6, a circuit 62 is also connected between the intermittent oscillation circuit 44 and the diode 45. Furthermore, the drive circuit 47
A circuit 63 connects the second timer 57 and the base of the transistor 53 to the output terminal of the comparator 40 in the thermo circuit 41, and
The collector of C-MOS 54 is connected to the intermittent oscillation circuit 44, and the output terminal of C-MOS 54 is connected to the self-holding circuit 33 via a circuit 64.
The high output of the MOS 54 is applied to the self-holding circuit 33 to stop the operation of the circuit 33. 6
5 is a circuit that sends the low output of the safe operation circuit in the control circuit 39 between the intermittent oscillation circuit 44 and the diode 45, and although not shown, it sends a signal to, for example, the self-holding circuit 33 during safe operation and disables the circuit 33. It is set to work.

To explain the operation of the above configuration, the first timer 51 in the drive circuit 46 is energized at all times (when the power is turned on), but at this time the resistor 49 and capacitor 5
Between 0 and 0, the circuit 60 is grounded via the switch 61, so the capacitor 50 is not charged and the timer 51 is not activated. Next, when the operation switch 27 is pressed, the self-holding circuit 33 is activated, closing the bias circuit 32 and opening the switch 61.
Also, the first timer 51 starts operating. At the same time as the operation switch 27 is pressed, the transistor 35 is turned on by receiving a base current from the circuit 36, the relay 34 is activated, and the pump 18 circulates. Then, due to the circulation of the pump 18, the flowing water detector 1
When the water switch 37 of 9 is closed, power is supplied to the control circuit 39 and thermo circuit 41 in the next stage, the gas burner 6 burns, and forced circulation heating of the water in the bathtub 15 is performed. Heating is performed in this way, and the bathtub 15
When the water reaches the set temperature, the temperature detector 20 decreases the resistance and the comparator 40 is reversed to the high output side, and the circuit 6
3 sends a high output to the drive circuit 47, the transistor 53 becomes conductive, the output of the C-MOS 54 becomes high, and the self-holding circuit 33 is controlled by the circuit 64.
- The operation is stopped in response to the high output of the MOS 54, and the bias circuit 32 is opened to stop combustion.

By the way, in this embodiment, when the bath is boiling, the notification buzzer 26 of the remote control device 25 is used to notify the user that the bath has heated up, and the same notification buzzer 26 is used to notify abnormalities in the pump 18 as well as abnormalities in the sequence. That's what I do.

First of all, in the case of poor circulation in the pump 18, the first timer 51 of the drive circuit 46 operates simultaneously with the operation of the pump 18 as described above, and the water switch 37
When the transistor 38 becomes conductive due to the closing of the transistor 38, the initial state is restored. Therefore, when the water switch 37 is not closed within the time set by the first timer 51, that is, when there is an abnormality in which the running water detector 19 does not detect running water, the timer 51 times out.
Due to this time-up, the transistor 52 becomes conductive, and the potential between the intermittent oscillation circuit 44 and the diode 45 is lowered by the circuit 62, and the continuous oscillation circuit 43 is activated to drive the transistor 31, and the notification buzzer 2 is activated.
6 chimes continuously. At this time, circuit 3
The base current from 6 to transistor 35 flows through circuit 66 to transistor 52 and relay 34
does not operate and the electrical connection to the pump 18 is cut off. Secondly, when there is an abnormality in the sequence, for example, when there is no ignition, the circuit 65 becomes low in potential and sounds continuously as described above. However, the former notification is made after the operation switch 27 is pressed and the first timer 51 is set, e.g. This notification is made after about 10 seconds have elapsed, and the latter notification is made during the combustion sequence, so the two can be sufficiently distinguished. Thirdly, when boiling occurs, the high output of the comparator 40 in the thermo circuit 41 is sent to the drive circuit 47 by the circuit 63, and at this time, the transistor 53 becomes conductive, its collector potential decreases, and the intermittent oscillation circuit 44 is activated. The notification buzzer 26 sounds intermittently. At this time, C-MOS54
The high output of is sent to the self-holding circuit 33 and the circuit 3
3 becomes inactive and opens the bias circuit 32;
Therefore, the high output from circuit 63 is cut off, but C-
Due to the high output of the MOS 54, the base current is sent to the transistor 53 via the capacitor 56 of the timer 57 during the set time of the second timer 57 (approximately 5 seconds), so the notification buzzer 26 is intermittently activated during the set time. It makes a sound.

(Effects of the invention) As described above, the present invention connects both an intermittent oscillation circuit and a continuous oscillation circuit to the notification buzzer of a remote control device, and uses both oscillation circuits when the thermo circuit is heated up, which is controlled by a temperature detector. Since the output of the pump and the non-detection output of the flowing water detector within the set time after energization of the pump are activated, a single alarm buzzer can be used to notify of boiling of the bath and poor circulation. To provide a forced circulation bathtub which is easy to distinguish between the two as they are notified in different notification modes, is extremely convenient to use, has a simple configuration of a remote control device, and is inexpensive. It is possible.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram of a forced circulation bath pot according to the present invention implemented in a one-can, two-circuit type bath pot with a water heater, and FIG. 2 is an electrical circuit diagram showing an embodiment of the present invention. 3... Heat exchanger, 6... Gas burner, 15...
Bathtub, 16... Outgoing pipe, 17... Return pipe, 18...
... Pump, 19 ... Flowing water detector, 20 ... Temperature detector, 25 ... Remote control device, 26 ... Notification buzzer, 27 ... Operation switch, 41 ... Thermo circuit, 43 ... Continuous oscillation circuit, 44 ...Intermittent oscillation circuit.

Claims (1)

[Scope of utility model registration request] Equipped with a gas burner that heats the heat exchanger, an outgoing pipe and a return pipe that connect the heat exchanger and the bathtub, a pump installed in the outgoing pipe, a running water detector, a temperature detector, an operation switch, and a notification buzzer. An intermittent oscillation circuit and a continuous oscillation circuit are both connected to the notification buzzer, and both oscillation circuits are controlled by the temperature detector to control the output of the thermo circuit at the time of boiling and the setting after the pump is energized. A forced circulation bath kettle characterized in that it is activated depending on the non-detection output of a running water detector within a certain period of time.