JPS6257014A - Preheating system for electric equipment - Google Patents

Abstract

PURPOSE:To save electric power and to prolong the life of electric equipment by providing a timer which is inserted in series with a temperature sensor contact and closed in a set time, and preheating the equipment only when the contact of this time is made and inhibiting the equipment from operating during the preheating. CONSTITUTION:When a preheating period set by a timer 12 is elapsed, the contact k4 is broken, a relay 8 stops, and a contact k14 is also open, so a command for stopping mechanism part operation is not supplied to a control circuit 3. Consequently, the control circuit 3 puts a mechanism part 2 in initial resetting operation and self-diagnosing operation. An automatic teller machine (ATM) 1 enters a transaction state until an operation time thereafter and when the operation time ends, a power source disconnection switch 6 is closed and a current flows through the relay winding R of a relay 10 to break a contact k3, so that the ATM 1 stops. Then, even when a temperature sensor 7 is closed, the preheating operation is limited by the timer 12, and even when the contact of the sensor 7 is closed before the preheating time, an AC power source is limited by the timer 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a preheating method for electrical equipment, and particularly to a preheating method for electrical equipment used in cold regions.

[Background of the invention]

Among electrical equipment, equipment with precision mechanisms such as motors and gears is shut down with the power turned off.

As the temperature of the installation environment drops, the viscosity of oil, grease, etc. used in one mechanism increases, which may cause problems such as malfunctions immediately after the power is turned on.

In order to prevent such problems from occurring, if the temperature drops below a certain temperature, measures such as automatically turning on electrical equipment using a temperature sensor and preheating the equipment by self-generating heat may be installed. was there. However, preheating by turning on the power when the temperature drops using a temperature sensor means that the power will be turned on automatically when the temperature drops even when there is no need to operate electrical equipment, such as on holidays or at night. Not only was power consumption was wasted, but it was also uneconomical in terms of the lifespan of the equipment.

Also, electrical equipment that has self-driving functions.

After power is turned on, many mechanical parts operate for initial recovery, self-diagnosis, etc., and if they are operated directly at low temperatures, they will not only not work properly, but may also damage the mechanical parts. Damage may occur, so when preheating by self-heating is performed, it is necessary to avoid performing the above-mentioned initial recovery operation and self-diagnosis operation immediately after power is turned on.

An example of a patent related to this preheating method is Japanese Patent Laid-Open No. 119426/1983.

[Purpose of the invention]

The purpose of the present invention is to solve such conventional problems and to eliminate wasteful preheating of electrical equipment that starts operating by preheating when the ambient temperature drops, thereby saving power and extending the life of the equipment. An object of the present invention is to provide a preheating method for electrical equipment that can prevent failures such as damage to mechanical parts.

[Summary of the invention]

In order to achieve the above object, the present invention includes (1) an electrical device having a mechanism for mechanical operation, and when a temperature sensor detects that the ambient temperature of the device has fallen below a predetermined temperature; In a preheating method for electrical equipment in which the contact closes and preheats the equipment before the equipment starts operating, a timer is inserted in series with the temperature sensor contact and closes within a set time. Preheating time is determined, and when the temperature sensor detects that the ambient temperature of the device has decreased to a predetermined temperature, the temperature sensor contact closes, and the timer contact closes within the preheating time. Preheat the above equipment only when and during the preheating.

The feature is that the start of operation of the above-mentioned equipment is suppressed.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below with reference to one drawing.

In this embodiment, an automatic teller machine (hereinafter referred to as an ATM machine) used in banks and the like will be described as an example of an electrical device that performs preheating.

Here, it is assumed that the operating hours of the ATM device on weekdays (Monday to Friday) are from 8:30 to ts:oo.

In addition, the operating hours of ATM equipment on Saturdays are from 8:30 to
The time shall be 14:00. However, the business will be closed on Sundays, holidays, and the second Saturday of the month.

FIG. 1 is a diagram illustrating an example of a circuit using a preheating method according to an embodiment of the present invention. This is an ATV to which the present invention is applied.
1 shows an example of a circuit for a device pulling device and an example of a circuit for a preheating mechanism provided in the ATM device according to the present invention.

In FIG. 1, ■ is an electrical device to which the present invention is applied (for example, an automatic teller machine, etc.), and 2 is a mechanism that performs mechanical operation (for example, a bill conveyance operation such as a bill conveyance mechanism of an automatic teller machine). 3 is a control circuit for controlling the mechanism section 2; 4. 1 is a power supply circuit that supplies the required power such as AC 100V to the mechanism section 2 and control circuit 3; 5 is a power supply switch that is manually opened and closed; 6 is a power cutoff switch that stops the operation of the ATM device 1; and 7 is a power supply circuit that operates depending on the ambient temperature. A temperature switch that closes the contacts when the temperature drops below the temperature; 8 and 9 are relays that control preheating operation; 1o is a self-holding relay that operates when the power-on switch 5 is closed or when the terminal block 14 is short-circuited; 11 is a preheating mechanism provided according to the present invention, 12 is a timer that limits the preheating period, and 13 is a relay 8.
14 is a terminal block to which the ATM device 1 and the preheating mechanism 11 are connected; 15 is the electrical equipment 1;
Terminal block for inputting a signal that can stop the control circuit 3 from the outside, k11 to k14 are contacts of the relay 8, k2
1 is the contact of the relay 9, k3 is the AC supplied to the power supply circuit 4
This is a contact point of relay 10 that opens and closes loovLA. Note that the contact point 3 is open when no current flows through the winding S of the self-holding relay 10, that is, when it is not operating. 4 is a contact point of the timer 12. .

The electrical equipment 1 includes a mechanism section 2. Control circuit 3. Power supply circuit 4. Power on switch5. Power cutoff switch 6° Self-holding relay 10. When the manual power-on switch 5, which is composed of terminal blocks 14 and 15 and is always open, is closed, current flows through the winding S of the self-holding relay 10, and the contact 3 is closed, supplying AC 100v to the power supply circuit 4. do. Next, power supply circuit 4
AC100V power is supplied to the mechanical section 2 and the control circuit 3 from the power source. After that, the control circuit 3 sends a control signal to the mechanism section 2, and the operation of the mechanism section 2 is started. Also,
Once the self-holding relay 10 operates, the current flowing through the winding LAS remains closed (even if the current flows through the winding LAS), the contact 3 remains closed, so in order to open the contact 3, the reset winding of the self-holding relay 10 must be The power cutoff switch S2 is closed so that current flows through the wire R. This operation makes it possible to stop the operation of the electrical equipment 1. Here, the terminals of the terminal block 14 are connected to external control (preheating). Even when a short circuit occurs due to the control of the mechanism, current flows through winding BS of self-holding relay 10, contact 3 closes, and power supply circuit 4 receives 100 VAC.
etc. The required power is supplied.

The reason why the self-holding relay 10 is used in the electrical equipment 1 in this way is to make it easier to control the connection/disconnection of the power supply AClooV from the outside. In other words, wind it through the terminal block 14 shown! This is because current only needs to be passed through the IS for the time required for relay contact operation.

The preheater ill is connected to the terminal block 14 of the electrical equipment 1 as described above.
．． 15, and when the ambient temperature of the device falls below a certain temperature, the mechanical parts etc. are preheated. Further, the preheating period (time) can be limited by the timer 12 provided according to the present invention. Hereinafter, the configuration of the preheating mechanism 11 will be explained, and the operation of the preheating mechanism 11 in relation to the electric device 1 will be explained.

The preheating mechanism 11 includes a temperature switch 7 and a relay 8゜IJL/
-9, timer 12. It is composed of a delay circuit 13 and the like.

Further, the delay circuit I3 is composed of a resistor R, a capacitor C, a Zener diode ZD, and a transistor Q.

In the circuit to which the temperature switch 7 is connected, a timer contact 4 is connected in series with the temperature switch 7, and a timer 12 connected to the timer contact 4 opens and closes the timer contact 4. Further, a relay 8 and a normally open contact (normal oven contact) k11 are connected in series to the @degree switch 7 and the tie contact 4. The timer 12 can be turned on or off for each day of the week, and
Turn on preheating operation of electrical equipment 1 during one day (24 hours)
It is possible to set the off time, and correspondingly, the timer contact 4 is open when the timer 12 is off.

When it is on, the contact closes.

Also, transfer contact k12 of relay 8, resistor R, capacitor C, and zener diode ZD.

There is a separate circuit consisting of a delay circuit 13 made from transistor Q and a relay 9 connected between the collector of transistor Q and the +12V power supply. Contact k of this separate circuit
12 is connected to the side where the base side of the transistor Q and the resistor R are normally connected (when not in operation). Therefore, transistor Q is in an off state in the illustrated state. In addition, a contact (normally closed contact) k21 that is closed when the relay 9 is not operating is connected in series with the contact (normal oven contact) k13 of the relay 8, and one side of the re-contact is connected to the terminal of the terminal block 14. Also, the contact (normal oven contact) k14 of relay 8 is connected to terminal block 15.
It is connected to the.

FIG. 2 is a preheating operation time chart of FIG. 1. This shows the case where the ATV device is preheated on weekdays (Monday to Friday).

Therefore, the operating time of ATM device 1 is from 8:3° to 18:00.
:00. Further, the preheating period is set, for example, from 5:00 to 8:30 by the timer 12.

Hereinafter, the explanation will be made according to time charts 1 to 1 in FIG.

When the ambient temperature of the ATV equipment@1 decreases below the operating temperature of the temperature switch 7, the contacts of the temperature switch 7 close. However, under the control of the timer 12, the relay 8 does not operate until after 5:00. When time passes and time 1 becomes S:OO with the contact of the temperature switch 7 closed, the relay 8 operates and the contact 1 which is normally open (normal oven contact) k1
1+k13+k14 closes. Next, the contact (transfer contact) k12 moves to the side shown by the broken line (see FIG. 1), and the delay circuit 13 operates. At this time, the delay circuit 13 delays by a time constant determined by the values of the low resistor R and the capacitor C (the delay time is t).

That is, after the time elapses, the transistor Q turns on, and current flows to the relay 9, which closes the normally open contact (
Normally closed contact) k21 opens 6 In other words, the delay time t obtained by the delay circuit 13 after the relay 8 operates
Only during this period, the terminals of the terminal block 14 of the ATM device [1 are short-circuited, current flows through the winding S of the self-holding relay 10, and the contact point 3
is closed, AClooV is supplied to the power supply circuit 4, and
Power is supplied to the mechanism section 2 and control circuit 3.

Furthermore, when the relay 8 operates in the above operation, the contact k11 connected in parallel with the temperature switch 7 closes, so even if the temperature of the ATM device rises due to the preheating operation described above and the temperature switch 7 opens, Contact k11 remains closed until timer contact 4 opens. Therefore, contacts 14 of relay 8 also remain closed, and terminal block 1
5, a command to stop the mechanism operation is sent to the control circuit 3. As a result, the control circuit 3 stops the operation of the mechanism section 2, so that the mechanism section 2 does not operate in the initial recovery operation or self-diagnosis operation while the temperature remains low, and damage to parts can be prevented.

In the configuration of FIG. 1, when the preheating period set by the timer 12 (for example, 5:00 to 8:30) ends, that is, when the timer contact 4 opens, the relay 8 stops operating.
Since the contact k14 is also opened, there is no command to stop the operation of the mechanism section 3 given to the control circuit 3, so the control circuit 3 causes the mechanism section 2 to perform an initial recovery operation or a self-diagnosis operation. From then on, the ATV device 1 is in a transaction state until 18:00, and when the power cutoff switch 6 is closed at 18:00, the reset winding R of the self-holding relay IO is
Current flows through the contacts 3 and opens the ATM device i! ] becomes a suspended status. Thereafter, even if the contact of the temperature switch 7 is closed again, since the preheating operation is limited by the timer 12, the required power such as AC 100V is not supplied to the power supply circuit 4 and the like. Also, even if the contact of the temperature sensor 7 closes before 5:00.

Since the required power such as AC 100V is supplied by the timer 12 only from 5:00 to 18:00,
The power consumption of the ATM device can be reduced.

FIG. 3 is a timing chart comparing the conventional method and this embodiment with respect to the preheating time of the ATM device 1 for each day of the -week. Figure 3(a) shows the conventional preheating method,
FIG. 3(b) shows the preheating method according to this embodiment.

Here, at 5:00 (excluding business holidays), timer 1
Time to turn on 2: 8:30 (excluding business holidays)
is the handling start time of device 1 (in this embodiment, the time when the timer 12 is turned off), 18:00 is the handling end time of device @1 (14:00 on Saturdays excluding Saturdays), and This is the time to turn off the power of 1. Furthermore, the shaded area is the time period during which the device 1 can be preheated.

As shown in FIG. 3(a), in the conventional preheating method.

ATM device 1 did not enter preheating operation during the operating hours of ATM device 1 from 8:30 to 18:00 (8:30 to 14:00 on Saturdays), but at other times. (the shaded area shown in FIG. 3(a)), the ATV device 1
When the ambient temperature of the device 1 drops below a certain temperature, there is a possibility that the temperature switch 7 will be turned on and the device 1 will enter a preheating operation. However, in this embodiment, as shown in FIG. 3(b), the time period during which the device 1 can be preheated is limited by the timer 12 to only, for example, 5:00 to 8:30 on days when banks etc. are open. This eliminates unnecessary power consumption.

As described above, in this embodiment, if the ambient temperature (environmental temperature) is low before the ATV device 1 is used, the power is automatically turned on while the ATV device 1 is stopped, and the preheating period is set by the timer 12. can be controlled. Therefore, ATM
When the device is not in use, preheating can be avoided, saving power and extending its life. Also, immediately after turning on the power,
In ATM devices and the like that perform initial recovery operations and self-diagnosis of the mechanism section 2, the operation of the mechanism section 2 can be stopped during the preheating period, so failures such as damage to parts can be prevented.

In the present embodiment, an ATV device was described as an example of an electric device, but there is a problem if the device is operated immediately after the ambient temperature of the device drops.

A similar circuit configuration can be applied to any device that requires preheating. Further, in this embodiment, the timer 12 can be programmed for one week, but the timer 12 is not limited to this, and any configuration of the timer may be used as long as it can limit the preheating time.

Similarly, the configuration of the temperature switch 7 and the like does not need to be limited to this embodiment. In addition, in this example.

Although the circuit is constructed using a relay, the same effect can be obtained by using a switching element (such as a transistor) in place of the relay.

〔Effect of the invention〕

As explained above, according to the present invention, in electrical equipment etc. that starts operation by preheating when the ambient temperature drops,
f#, since unnecessary preheating is no longer required, it is possible to save power and extend the life of the equipment.

Moreover, it is possible to prevent failures such as damage to mechanical parts.

[Brief explanation of the drawing]

Fig. 1 is an example of a circuit using a preheating method showing an embodiment of the present invention, Fig. 2 is a preheating operation time chart 1-1 of Fig. 1, and Fig. 3 is a comparison between a conventional preheating method and a preheating method according to the present invention. This is a timing chart. 1: ATV device, 2 = mechanism section, 3: control circuit, 4: power supply circuit, 5: power on switch, 6: power off switch,
7: @ degree switch, 8, 9: relay, 10: self-holding relay, 11 is preheater provided according to the present invention [, 12:
13 is a delay circuit, and 14.15 is a terminal block. Figure 2

Claims (1)

[Claims] (1) Equipped with an electrical device that has a mechanism for mechanical operation, and when a temperature sensor detects that the ambient temperature of the device has fallen below a predetermined temperature, the contact of the temperature sensor closes and preheats the device. In a preheating method for electrical equipment in which the equipment starts operating after the temperature is reached, a timer is inserted in series with the temperature sensor contact and closes within a set time. The device is preheated only when the sensor detects that the ambient temperature of the device has fallen to a predetermined temperature, the temperature sensor contact is closed, and the timer contact is closed within the preheating time. . A preheating method for electrical equipment, characterized in that during the preheating, operation of the equipment is inhibited.