JPS5816002Y2 - Server control circuit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a control circuit for a server that automatically makes food and drinks such as miso soup, coffee, and soup stock for udon noodles.

First, the configuration of a general miso soup server will be explained.

Figure 1 is a schematic explanatory diagram of the server, where 1 is a hot water storage tank, 2
is a float that detects the scene position, and turns on and off the low water level limit switch SW1 in relation to that position.

A hot water supply pipe 4 communicates with a mixing container 5, and a solenoid valve 6 for controlling hot water supply is provided in the middle of the pipe.

H is a heater that heats the water in the tank 1, and THl is a thermoswitch that controls power supply to the heater in response to the temperature of the water in the tank.

TH2 is a low temperature limit thermoswitch for preventing the hot water supply solenoid valve 6 from operating when the temperature of the hot water in the tank 1 is low.

Note that the low water level limit switch SW1 is used to stop energizing the heater H and stopping the operation of the solenoid valve 6 when the hot water level in the tank is lower than a predetermined position.

Reference numeral 7 denotes a raw material tank which contains powder 8 for making miso soup, and has a supply port 9 on the lower side.

Reference numeral 10 denotes a discharging actuator that rotates in conjunction with the raw material discharging motor M, and has a coil-shaped tip, and as it rotates, powder 8 is discharged from the supply port 9 to the outside.

The powder 8 coming out of the supply port 9 falls onto the mixing container 5.

The mixing container 5 has a funnel shape, and flows down into the outer container 11 from the outlet part while mixing the supplied hot water and powder.

The external container 11 is a desired container such as a cup or a bowl, and miso soup can be obtained therein.

Therefore, in the above server, the solenoid valve 6 and the motor M are each driven for a predetermined period of time in response to the press of the miso soup production instruction switch (not shown) to supply appropriate amounts of hot water and powder 8 into the mixing container 5, Miso soup with a predetermined volume and a predetermined concentration is obtained, but if the timing of supplying hot water to the mixing container 5 is later than the timing of discharging the powder 8, the powder 8 will solidify in the container or the external container 11, and the hot water supply will be delayed. If the stop timing is earlier than the stop timing of the powder 8, the powder will solidify or remain attached to the inside of the mixing container 5, resulting in unsanitary conditions, as described above.

Therefore, normally, the drive timing of the solenoid valve 6 and the motor M is set so that the discharge of the powder is completed during hot water supply, as shown in the time chart shown in Fig. 2. To do this, each time indicated by the arrow is set. Three timers TM1. T
M2. TM3 is required, which not only complicates the circuit configuration but also increases the number of parts.

This invention works when the solenoid valve 6 and motor M are stopped at the same time.
, the above-mentioned drawbacks have been eliminated by paying attention to the fact that the timing at which water supply ends in the mixing container 5 is later than the timing at which powder supply ends.

The present invention will be described in detail below with reference to the drawings. FIG. 3 shows the server control circuit of the present invention.

In the figure, A is a main circuit section, B is a timer section, and both are connected via a transformer TR.

In the main circuit section A, MSW is a main switch, and F is a fuse.

The heater H is connected to the power supply via the thermoswitch TH1 and the low water level limit switch SWI, and as mentioned above, when the water level in the tank 1 is low or the water temperature exceeds a certain temperature, the energization is blocked. It is configured to

The low temperature limit thermoswitch TH2 is connected in series with the relay X1, and is connected to the power source via the low water level limit switch SWI.

This relay X1 controls the energization to the timer as described later, and prevents the energization to the timer when the water temperature in the tank 1 is above a certain temperature or when the water level is below a certain water level. This prevents the supply of hot water and the transportation of powder.

In addition, the solenoid valve 6 is connected to the motor M via the reed contact X2□.
are each connected to a power supply via a lead contact X3p.

The timer part B is mainly driven by a hot water supply timer T1 and a timer T2 for controlling the motor M, and is driven by DC power supplied via a transformer TR and a rectifier circuit DT.

The hot water supply timer T1 has a capacitor C connected in series.
2. Consists of a time constant circuit made up of resistor R1 and variable resistor VRI, resistors R3 and R4 that set a reference voltage for comparison, and a comparator PuTl that compares the reference voltage for comparison with the charging voltage of capacitor C2. has been done.

The output of the comparator PuT1 is supplied to the control terminal of the thyristor SCR1 to control its on/off state.

The thyristor SCR1 performs on/off control of the driving transistor Tr of the self-holding relay X2.

The timer T2 for controlling the motor M has exactly the same configuration as the above-mentioned timer T1, but the set time of the timer is set shorter than that of the timer T1.

Thyristor SCR2 controlled by the output of timer T2 is used to drive relay X3.

R3W is a miso soup production instruction switch that is inserted into the power line and controls the supply of power to timers TI and T2.

X1p is the relay contact of relay X1 and the above switch PSW
are installed in series.

X22p is a self-holding relay contact for the power supply and is controlled by relay X2.

X23p is a relay contact inserted in the power supply line between timers TI and T2, and is also controlled by relay X2.

Note that C1 is a capacitor.

Next, the operation will be explained with reference to the time chart shown in FIG.

When the main switch MSW is turned on, power is supplied to each part, but if the water level in the tank 1 is lower than a predetermined position, the switch SW1 is activated and virtually no operation is performed.

When the water level in tank 1 is above the predetermined position, switch S
WI is turned on and heater H is energized to heat the water in tank 1, but since the water temperature is initially low, thermo switch TH2 is turned on.
is off, and relay X1 is not driven.

Therefore, the relay contact X1p is off and the indicator switch P
Even if the SW is pressed, power is not supplied to the timer part B, and the hot water supply and powder discharge operations are not performed at all.

When the water temperature in tank 1 reaches a predetermined value, thermo switch TH
2 turns on and drives relay X1, so relay contact X1
P is turned on and preparations for making miso soup are completed.

Note that the water temperature is maintained at a constant temperature by a thermoswitch THI.

When the instruction switch PSW is pressed here, the transistor Tr is turned on and the relay X2 is driven, and the self-holding contact X
22p turns on and maintains the current conduction, and contacts X21.
, X23p turns on.

As a result of this operation, the timers TI and T2 simultaneously start operating and the solenoid valve 6 is opened.

By opening the electromagnetic valve 6, hot water in the tank 1 is supplied into the mixing container 5 via the hot water supply pipe 4.

If this operation continues for one hour t2, the timer T2
The charging voltage of the capacitor C3 corresponds to the reference voltage for comparison, and is outputted from the comparator PuT2.

This output turns on thyristor SCR2 and relay
3 is driven, relay contact X3p turns on and motor M
rotates.

Due to the rotation of motor M, powder 8 is supplied from supply port 9 to mixing container 5.
fall on top.

That is, hot water and powder 8 are supplied to the mixing container 5, and the powder 8 falls into the external container 11 while melting at this portion.
It becomes miso soup in the container 11.

When this state continues for 13 hours, as shown in the time chart of FIG. 4, one time t1 of the timer T1 has elapsed, and the comparator PuT1 outputs an output.

This output turns off the transistor Tr via the thyristor SCR1, thereby stopping the driving of the relay X2.

When relay X2 stops driving, relay contact X2□p +
Since X22p and X23p are turned off and X3p is further turned off, the solenoid valve 6 is closed and the motor M is stopped at the same time.

Of course, the timers TI and T2 are reset to their initial states.

What should be noted here is that the hot water coming out of tank 1 is connected to solenoid valve 6.
It takes some time for the powder 8 to reach the mixing container 5 via the hot water supply pipe 4, and if the electromagnetic valve 6 and the motor M are stopped at the same time as described above, the powder 8 will not reach the mixing container 5 through the hot water supply pipe 4. The end of hot water supply is slower than the end of falling water.

Therefore, even if hot water supply and powder discharge are stopped at the same time as described above, the powder 8 on the mixing container 5 will always be washed away by the hot water and will not remain.

The above-mentioned hot water supply time and powder discharge time can be adjusted by variable resistors VRI and VR2 of timers TI and T2.

To set the timer for one hour, first vary the variable resistor VRI to set the time so that the hot water supply volume (the amount stored in the external container 11) is appropriate, and then vary the variable resistor VR2 to supply the powder 8. Just set the time so that the amount is appropriate.

At this time, if a knob for variable resistor VR2 is provided on the operation panel, the concentration of miso soup can be changed according to the user's preference.

As described above, according to the present invention, only two sets of timers are required, the circuit configuration is simpler than the conventional one, and the amount of hot water and raw materials supplied can be easily adjusted.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of the server, FIG. 2 is a time chart for explaining it, FIG. 3 is a circuit diagram of the server control circuit of the present invention, and FIG. 4 is a time chart for explaining it.

Claims (1)

[Claims for Utility Model Registration] Comprising a liquid supply device, a raw material delivery device, and a common outflow container that receives the liquid and raw materials supplied from both of the above devices and flows out to the outside, the liquid and raw material are discharged from the outflow container. In a server that is forced to make food and beverages such as miso soup and coffee by discharging raw materials into a common external container, the first server starts operating simultaneously based on the operation of an instruction switch.
, a second timer is provided, and the second timer sets one hour to the first timer.
Set the timer to a value shorter than one hour, and
A first driving means is provided for driving the liquid supply device during the operation of the timer, and a second driving means is provided for driving the raw material discharging device after the operation of the second timer is completed; A server control circuit characterized in that a reset means is provided for stopping the driving of the second driving means and returning the first and second timers to their initial states upon completion of the operation.