JPS5833458B2 - 2-wire clock temperature control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to two-wire clock temperature control devices, and more particularly to rechargeable battery powered time controlled thermostat (or electrical clock thermostat) devices.

Traditional time-controlled thermostats have for many years required at least three wires, which connect the thermostat to a remote power source and control device (used in systems that control the supply of temperature-conditioning medium to the space in which the thermostat is installed). It was connected to.

Changing the simple two-wire thermostat in the original structure to change the control system to one using a clock thermostat involves considerable difficulty because in addition to the two wires, another wire must be run through the wall.

In order to eliminate the need to draw a special line by using the same two wires mentioned above to supply power to the clock thermostat that controls the conventional control device, US Pat. , 1971.8
Various expensive solutions have been proposed, as seen in US Pat. No. 3,599,863, issued May 17th.

For example, in the case of the above-mentioned US Pat. No. 3,620,448, the power supply to the clock thermostat is two wires, but it is necessary to additionally install a power supply and a furnace control device near the furnace.

In these specifications, the clock motor is powered by two wires, and signals and waveforms of different power factors are superimposed on the two wires to control the remote control device.

As is well known, with the advent of low-power, highly accurate battery-powered time-controlled devices or clocks, such as the currently available crystal oscillator types, the time required to drive an electrical clock thermostat has increased. It has been proposed to use motors.

However, the motor has to perform the additional work of directly driving the mechanism that changes the maintenance temperature of the space to be temperature-conditioned, so a large torque is required.
Therefore, batteries had to be frequently changed and recharged.

The present invention provides a rechargeable battery powered electric clock thermostat for use in devices that control a remote control device over two wires and connect the battery to a remote power source through a charging circuit over the same two wires.

That is, according to the present invention, providing a thermostat control circuit and a clock motor drive circuit does not require new lines, and can be realized by simply replacing a simple thermostat with an electric clock motor. .

The present invention will be explained below with reference to the drawings.

FIG. 1 is a circuit diagram showing a battery-powered time-controlled thermostat device connected to a remote power source and a control device for controlling the supply of temperature conditioning medium to a space in which the thermostat is installed. is 2 lines 12,1
3 is controlled by a temperature responsive or thermostatic device 11 connected to a remote control panel 14.

The panel 14 has a power supply 15 and an output circuit 20.

The output circuit 20 includes a temperature conditioning or heating medium which is circulated through the space 10 through a duct 23 by a fan 24;
That is, it is connected to an operating device, ie, a valve 21, of an air temperature conditioning device, ie, a device that controls the supply of fuel oil or gas to the furnace 22.

The thermostatic device 11 has a temperature responsive control device or mechanism, ie a bimetallic switch device 25, for maintaining one of two different temperature levels.

Such a device is, for example, the clock thermostat disclosed in U.S. Pat. It has an element.

The temperature control of the thermostat device 11 may selectively adjust the control temperature to be maintained at different times, such as by maintaining the daytime temperature at 72c'F'' (approximately 22C) and changing the thermostat control point at 10 p.m. and the night temperature was 65c'.
F (approximately 18° C.) until the next morning, and adjusted by a time control mechanism or clock driven by motor 30 so that daytime temperature is selected again in the morning.

In the present invention, no special thermostatic device 11 is required to selectively maintain different control temperatures in the space 10.

Motor 30 is powered by a rechargeable battery 32 which is recharged using the same two wires by a charging circuit described below.

FIG. 2 shows a first embodiment of the invention, in which a thermostat 11 is connected to a panel 14 to control a control device or valve 21. In FIG.

A temperature responsive switch 25 is used to connect the control circuit to power supply 15 to energize valve 21.

Circuit 31 is an adjustable circuit for energizing a conventional anticipatory heater 26 that is thermally coupled to temperature responsive switch device 25.

The voltage to heater 26 can be adjusted by selectively changing the position of input tap 27 to adjust control of thermostatic switch 25.

Motor 30 is connected to a rechargeable battery 32 and drives thermostatic 110 hourly control mechanism.

One terminal of the battery 32 is connected to the line 12 by a conductor 33 and via a rediode 34, and the other terminal is connected to the line 12 by a conductor 33 and through a rediode 34.
5 is connected to another line 13 through a limiting resistor 40;
A charging circuit for the battery 32 is formed.

The battery is constantly charged from the power source 15.

The current from the power supply for recharging the battery is limited by resistor 4
0 limits the value to a value smaller than that required to drive valve 21.

Therefore, valve 21 will not operate when the thermostat does not require heating.

FIG. 3 shows another embodiment of the invention, in which thermostat 11 is connected to power supply 15 and valve 21 by lines 12 and 13.
and is connected to a panel 14 having a

Thermostatic switch 25 is connected in parallel to motor 30 and when the switch is open, current is supplied through diode 34 to recharge battery 32.

Limiting resistor 40 limits the current to prevent valve 21 from operating.

FIG. 4 shows yet another embodiment of the invention, in which thermostat 11 is connected to power supply 15 by wires 12 and 13.
and a valve 21 .

The rectifier 34 which supplies power to recharge the battery 32 consists of a conventional diode bridge which provides a rectified current over one cycle of the AC power supply 15.

Current from the power supply is limited by a limiting resistor 40.

As described above, according to the present invention, a conventional simple thermostat, that is, a thermostat without a set-pack function, can be converted into a so-called clock thermostat having a setback function without changing the two-wire type. This method is extremely convenient and economical because it does not require any installation work for power supplies, furnace control devices, etc., and it is only necessary to replace the simple thermostat with the clock thermostat according to the present invention.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a battery-powered time-controlled thermostat device connected to a remote power source and a control device, and FIGS. 2 to 4 are circuit diagrams showing each embodiment of the present invention. In the figure, 11... thermostat device, 14...
...Remote device, 15...Power supply, 21...
...Valve, 22...Temperature conditioner, 23...
...Duct, 24...Fan 25...
・Thermostat, 26... Heater, 30...
...Motor, 32...Battery, 34...
...Diode, 40...Current limiting resistor.

Claims (1)

[Scope of Claims] 1. A device that is installed in a space to be controlled and connected to form a series circuit with an operating device that controls the operation of a temperature conditioning device that supplies a temperature conditioning medium to this space, and that is connected to an AC power source.
a two-wire clock temperature control device powered by a wire, the thermostat being sensitive to the temperature of the space and operating an open/close switch when the temperature changes by a predetermined amount from a selected temperature control point of the thermostat; a clock means coupled to said temperature control point for periodically changing said temperature control point; a rectifier means connected in series to said rectifier means for converting alternating current from said alternating current power supply provided by said two wires into direct current; the thermostat comprising: current limiting means for limiting the current flowing through the rectifying means; and a rechargeable battery charged with current from the rectifying means and connected to energize the clocking means; The two wires are connected in parallel at a position between the AC power source and the current limiting means, and when the thermostat does not request operation of the temperature conditioner, the current is limited by the current limiting means to operate the operating device. is dewormed, and conversely, when the thermostat requests operation of the temperature conditioning device, the operating device is operated by being supplied with an alternating current of a value larger than the limited current via the thermostat. This is a two-wire clock temperature control device. 2. The two-wire clock temperature control device according to item 1, wherein the rectifier comprises a full-wave rectifier that supplies charging current to the battery over all cycles of the AC power source. 3. The two-wire clock temperature control device according to item 1, wherein the rectifier comprises a half-wave rectifier that supplies charging current to the battery over a half cycle of the AC power supply. 4. The first device characterized in that the current limiting means consists of a resistor.
2. The two-wire clock temperature control device according to item 1, 2, or 3. 5. The two-wire clock temperature control device according to item 1, 2, or 3, wherein the clock means comprises a clock motor.