JPH01155143A - Control device for liquid heater - Google Patents

Abstract

PURPOSE:To permit continuous take-out of heated liquid irrespective of an indication, by a method wherein the indication, showing that a heater is conducted and liquid is being heated, is operated with the delay of a predetermined period of time from the command of putting the heater ON, when the liquid is supplemented to a heating unit and the heater is conducted by the ON command of a heater control unit. CONSTITUTION:When warmed SAKE in a heating unit is discharged in a liquid heater or a SAKE warmer, the SAKE is supplemented newly, a liquid temperature sensor 21 detects a low liquid temperature, the output of a NAND circuit 35 becomes 'L' and a heater is conducted. The capacitor 44 of a delay timer 25 is discharged when the output of the NAND circuit 35 is 'L' to keep the output of an OR circuit 41 at 'L'. When about 15sec has elapsed and the discharge of the capacitor 44 is advanced, the output of the OR circuit 41 becomes 'H' and a SAKE temperature lamp 20 is put ON with the delay of a predetermined period of time. Accordingly, an user may be able to take out the necessary amount of warmed SAKE, remaining at the upper part of the heating unit.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a control device for a liquid heater such as a sake brewer, tea dispenser, water heater, etc.

(b) Prior art A conventional liquid heater of this type is, for example,
As disclosed in Publication No. 15, a liquid storage tank for storing liquid, a heating section connected to this tank via a liquid supply pipe and having a heater for heating the liquid, and an output connected to this heating section are disclosed. It is equipped with an on-off valve that is installed in the liquid pipe and supplies the heated liquid of the heating section to the outside, and a control device that controls the opening and closing of this on-off valve and controls the energization of the heater, and opens the on-off valve by operating a switch. The heated liquid in the heating section is supplied to the outside, and energization of the heater is controlled to maintain the temperature of the liquid in the heating section at a set temperature.

(c) Problems to be solved by the invention In the liquid heater described above, heating liquid is supplied externally, and when new liquid is replenished from the liquid storage tank to the heating section, the heater is energized and the replenishment is performed. As well as heating the liquid,
While the heater was energized, a display device such as a lamp was activated to indicate that heating was in progress.

However, the amount of liquid stored in the heating section is set to a level higher than the normal one-time supply amount (2 to 3 times the one-time supply amount), and a large amount of liquid at the set temperature or higher remains in the heating section. However, the operation of the display device has the drawback of causing a misunderstanding that the entire liquid in the heating section is at a low temperature.

This invention was made in view of the above facts,
To enable a user to take out liquid at an appropriate temperature from a heating part without being confused by the operation of a display device.

(d) Means for Solving the Problems This invention includes a liquid storage tank for storing liquid, a heating section connected to this tank via a liquid supply pipe and having a heater for heating the liquid, and a heating section connected to this tank through a liquid supply pipe. In a control device for a liquid heater, which is equipped with an on-off valve that is installed in a connected liquid output pipe and supplies heated liquid from a heating section to the outside, the control device issues an opening/closing command to the on-off valve in response to a switch operation. a supply control unit, a heater control unit that compares the liquid temperature of the heating unit with a set temperature and issues an on/off command to the heater based on the comparison result; and operates with the on command of the heater control unit as input; This configuration includes a delay timer that operates the display device after a predetermined time delay from when the ON command is issued.

(e) When the on-off valve is opened by operation of the operation switch and the heated liquid in the heating section is supplied to the outside, new liquid is replenished from the liquid storage tank to the heating section. At this time, the heater control section issues an ON command and energizes the heater, so that the temperature of the liquid replenished to the heating section is quickly raised to an appropriate temperature (set temperature). In addition, since the display device operates after a predetermined time delay from when the heater ON command is issued, the user can draw out the necessary amount of liquid at the appropriate temperature from the heating section without being confused by the operation of the display device. It is possible.

(f) Examples Hereinafter, this invention will be explained in detail based on examples shown in the drawings.

In FIGS. 1 to 3, (1) is a sake bottle serving as a liquid heater to which the present invention is applied, and a base portion (2)
and a liquid storage tank (3) placed on a base portion (2), and a lid (4) that can be opened and closed is placed on the top opening of the liquid storage tank (3). A tank-shaped heating section (5) around which a heater (6) such as a band heater is wound is built into the base section (2). The bottom of the liquid storage tank (3) and the inlet (5A) at the bottom of the heating section (5) are connected by the liquid supply pipe (7), and the inlet (5A)
) and a drain cock (8) outside the base portion (2) are connected via a drain pipe (9). In addition, the outlet (5B) at the top of the heating section (5) and the sake outlet (10) outside the base section (2) are connected via the outlet pipe (11), and the outlet (5B) ) communicates with the upper part of the liquid storage tank (3) via an air vent pipe (12). The liquid pipe (11) near the Okanzake outlet (10)
) is equipped with an on-off valve (13) such as a solenoid valve. (
14) is a metering switch (15), a stop switch (16), a replenishment switch (17), a heater switch (18), a heater lamp (19) on the front surface of the base part (2), and a pot lamp (20) as a display device. ), heating section (
5) A liquid temperature sensor such as a thermistor inserted at the bottom of the
21), etc., including a heater (6) and a lamp (19) (
This is a control device that performs energization control of 20) and opening/closing control of the on-off valve (13). Further, (P) is an air intake pipe that is provided to penetrate the lid (4) and communicates between the inside and outside of the liquid storage tank (3).

Here, the capacity of the liquid storage tank (3) is set to 7.2 l, the capacity of the heating section (5) is set to 53 occ, and the capacity of the heater is set to 880W.

As shown in FIGS. 1 and 2, the control device (14) includes a liquid supply control section (22) that issues opening/closing commands to the on-off valve (13) in response to the operation of switches (15), (16), and (17).
), the detected temperature T of the liquid temperature sensor (21) and the set temperature Tll of the temperature setter (23) consisting of a variable resistor are compared,
T(T.

A heater control unit (2) issues an on command to the heater (6) when T≧TB, and issues an off command to the heater (6) when T≧TB.
4) and a delay timer (25) which operates upon receiving the ON command from the heater control unit (24) and turns on the water lamp (20) after a predetermined time delay (for example, about 15 seconds) from when the ON command is issued. ).

The liquid supply control section (22) has each switch (15) (16
) (17), an OR circuit (26) having two inverting input terminals, a CR timer circuit (29) having a capacitor (27), a resistor (28), a series circuit (SC) of a resistor and a diode, etc. , a NAND circuit (30), a transistor (31) whose pace inputs are the outputs of the NAND circuit (30) and the addition switch (17), and a transistor (
Transistor (32) that uses the output of 31) as a pace input
and a relay (3) connected in series to a transistor (32).
3) (34). The heater control section (24) includes a liquid temperature sensor (21), a temperature setting device (23), a NAND circuit (35) that outputs these outputs by one person, and an inverting input terminal on which the output of the NAND circuit (36) is connected. an OR circuit (37) supplied to
) and a relay (39) connected in series. The delay timer (25) consists of an OR circuit (41) in which the output of the NAND circuit (35) is supplied to one inverting input terminal via a diode (40), resistors (42) (43), and a capacitor (44). A charging/discharging circuit (45), a transistor (46) whose base and input are the output of the OR circuit (41), and a relay (47) connected in series with the transistor (46). In addition, (48) is AC power supply, (49) is fuse, (50) is varistor, (51)
is a step-down transformer, (52) is a smoothing circuit, (53) is a DC constant voltage circuit, and (54) is a DC constant voltage terminal. This DC constant voltage terminal (54) is the part with the same symbol in Figure 2. connected in common. Also, (331X341X3
91) and (471) are relays (33) (3
4) It is the contact point of (39) and (47).

AC power (48) is supplied and the heater switch (18)
Assuming that the heater lamp (19) is turned on,
is lit, indicating that the heater (6) can be energized. The heater control section (24) also includes a NAND circuit (3
Since the voltage vDD of the DC constant voltage terminal (54) is supplied to one input terminal of 5), the detected temperature of the liquid temperature sensor (21) is lower than the set temperature of the temperature setting device (23), and the NAND circuit ( 35) is at a high potential, the output of the NAND circuit (35) becomes "L". At this time, the output of the OR circuit (37) becomes "H" and the transistor (38) becomes Since it is turned on and the relay (39) is excited, the heater (6) is energized and the liquor in the heating section (5) is heated.In addition, the output of the OR circuit (41) is also
H11 turns on, transistor (46) turns on and relay (47) is energized, so Okan lamp (20)
lights up to indicate that the device is busy. Then, when the temperature detected by the liquid temperature sensor (21) exceeds the set temperature,
The output of the NAND circuit (35) becomes “H” and the OR circuit (
37) The outputs of (41) both become "L It. At this time, the heater (6) is de-energized and the rice lamp (
20) goes out. In this way, the heater (6) is energized intermittently, and the sake in the heating section (6) is maintained at a temperature suitable for the pot.

When the user instantly suppresses the metering switch (15), the output of the OR circuit (26) of the liquid supply control section (22) becomes H''.At this time, the capacitor (27) is connected to the series circuit (SC). Charging takes place via the capacitor (2
The output of the NAND circuit (30) is "L It" until the charging of the transistor (31) is completed.
) is turned off, the transistor (32) is turned on, and the on-off valve (13) is opened by excitation of the relay (33).

Also, the relay (34) is energized, and the relay contact (341)
) is opened. The L''' output of the NAND circuit (30) is also supplied to the OR circuit (26), so the quantitative switch (15)
), the output of the OR circuit (26) is “Hn
It will remain as . After a predetermined period of time has elapsed, for example, a 2-go sake bottle (5
5) becomes negative, charging of the capacitor (27) is completed and the output of the NAND circuit (30) becomes "H11", and the output of the OR circuit (26) also becomes "L".At this time, the transistor (31) is turned on, the transistor (32) is turned off, the relays (33) and (34) are de-energized, and the on-off valve (13) is closed. Also, since the relay contact (341) is closed, the capacitor (27) is turned off. ) is the resistance (28)
is discharged through. If the stop switch (16) is suppressed during dispensing of a fixed amount of liquid, the output of the NAND circuit (30) will become "H" and the supply of alcohol can be stopped, and if the amount of alcohol is less than the fixed amount, It is possible to take out.

Also, after taking out a certain amount of alcohol, you can use the refill switch (
17), it is also possible to forcibly turn on the transistor (32) and add more alcohol.

When the rice wine in the heating section (5) is supplied to the outside, new liquor in the liquid storage tank (3) is supplied to the heating section (5).

As a result, when the liquid temperature sensor (21) detects a liquid temperature lower than the appropriate temperature, the output of the NAND circuit (35) becomes "L", the output of the OR circuit (37) becomes "I(", and the heater (6) )
is energized. The delay timer (25) is a NAND circuit (3
When the output of 5) is "H", the capacitor (44) is charged via the resistor (43), and when the output of the NAND circuit (35) is "L", the charge of the capacitor (44) is charged to the resistor. (42), so even if the output of the NAND circuit (35) changes from "H" to "L", the output of the OR circuit (41) will change due to the action of the diode (40). It is kept at “L”. The output of the NAND circuit (35) is “L”
For example, about 15 seconds have passed since the capacitor (
As the discharge of the charge in 44) progresses, the output of the OR circuit (4]) also becomes "H", so the food lamp (20) lights up.

In this way, according to this embodiment, the heater control section (24)
Since the rice cooker lamp (20) lights up after a predetermined time delay from when the heater (6) is turned on, the user can turn on the heating section (5) without being confused by the blinking of the rice cooker lamp (20). You can take out the required amount of sake remaining at the top. Also, at the same time as the ON command, the heater (6)
Since the heating section (5) is energized, the temperature of the alcohol supplied to the heating section (5) can be raised quickly, and the rice wine can be taken out continuously.

(G) Effects of the Invention Since the present invention is configured as described above, the user can take out as much liquid at an appropriate temperature from the heating section as necessary without being confused by the operation of the display device, and the heating section It is possible to quickly raise the temperature of the liquid that has been replenished and to take out the heated liquid continuously, which greatly improves usability.

[Brief explanation of the drawing]

The figures relate to a control device for a liquid heater showing one embodiment of the present invention. Fig. 1 is a block diagram of the control device, Fig. 2 is a detailed circuit diagram of the control device, and Fig. 3 is a control device to which this invention is applied. FIG. 2 is a schematic configuration diagram of a sake bottle (liquid heater). (1)... Sake bottle (liquid heater), (3)...
・Liquid storage tank, (5)...Heating part, (6)・
...Heater, (7)...Liquid supply pipe, (11)...
...Liquid pipe, (13)...Opening/closing valve, (1
4)...control device, (15X16X17)...
Switch, (20)...Okan lamp (display device), (22)...Liquid supply control unit, (24)...
- Heater control unit, (25)...delay timer.

Claims (1)

[Claims] (1) A liquid storage tank that stores liquid, a heating section that is connected to this tank via a liquid supply pipe and has a heater for heating the liquid, and a heating section that is installed in a liquid output pipe connected to this heating section and heated. In a control device for a liquid heater, the control device includes a liquid supply control section that issues an opening/closing command to the on-off valve in response to a switch operation, and a liquid temperature control section that controls the temperature of the liquid in the heating section. A heater control unit that compares the temperature with the set temperature and issues an on/off command to the heater based on the comparison result, and a heater control unit that operates with the on command as input and delays by a predetermined time from the time the on command is issued. 1. A control device for a liquid heater, comprising: a delay timer for operating a display device.