CA2878762A1 - A power off device to avoid fire accidents of electric cooking appliances and electric dryers - Google Patents
A power off device to avoid fire accidents of electric cooking appliances and electric dryers Download PDFInfo
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- CA2878762A1 CA2878762A1 CA2878762A CA2878762A CA2878762A1 CA 2878762 A1 CA2878762 A1 CA 2878762A1 CA 2878762 A CA2878762 A CA 2878762A CA 2878762 A CA2878762 A CA 2878762A CA 2878762 A1 CA2878762 A1 CA 2878762A1
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Abstract
This invention relates to a device to shut off the power supply of electric cooking appliances or electric dryers once overheating food or overdrying clothes happens, and then to avoid a fire occurrence. This device comprises a control-execution unit, at least one smoke/temperature detector and at least one power-on reset controller. It is practicable to achieve a device of this invention by directly integrating and assembling conventional smoke/temperature alarm, wireless remote switch, wireless remote control and a few other electronic parts. The communication between the control-execution unit and the smoke/
temperature detector is based on wireless signal transmission. The communication between the control-execution unit and the power-on reset controller is based on either wireless signal transmission or wired signal transmission. The control-execution unit can be separated with electric cooking appliances or electric dryers; it is connected with them through a power supply cable. Also, the control-execution unit can be fixed on or inside electric cooking appliances or electric dryers and be treated as a component of electric cooking appliances or electric dryers.
temperature detector is based on wireless signal transmission. The communication between the control-execution unit and the power-on reset controller is based on either wireless signal transmission or wired signal transmission. The control-execution unit can be separated with electric cooking appliances or electric dryers; it is connected with them through a power supply cable. Also, the control-execution unit can be fixed on or inside electric cooking appliances or electric dryers and be treated as a component of electric cooking appliances or electric dryers.
Description
A POWER OFF DEVICE TO AVOID FIRE ACCIDENTS OF
ELECTRIC COOKING APPLIANCES AND ELECTRIC DRYERS
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to fire prevention of electric cooking appliances and electric dryers.
Overheating food on cooking appliances or overdrying clothes in dryers may cause a fire accident. According to the statistics of NFPA, nearly 50% of residential fire accidents were caused by cooking appliances and dryers. In North America, most of cooking appliances and dryers used in residential units are powered by electricity.
ELECTRIC COOKING APPLIANCES AND ELECTRIC DRYERS
BACKGROUND OF THE INVENTION
1. Field of the Invention The present invention relates to fire prevention of electric cooking appliances and electric dryers.
Overheating food on cooking appliances or overdrying clothes in dryers may cause a fire accident. According to the statistics of NFPA, nearly 50% of residential fire accidents were caused by cooking appliances and dryers. In North America, most of cooking appliances and dryers used in residential units are powered by electricity.
2. Description of the Related Art Currently, there are several kinds of fire prevention devices of electric cooking appliances in the market. They are based on the same working principal; and mainly comprise of power off switch, control panel, motion sensor as well as connection cable.
During a cooking time, if people leave cooking area so that the motion sensor can't receive the motion signal from people anymore, the power of electric cooking appliances will be shut off after a pre-set time. These devices prevent fire accidents of electric cooking appliances in this way.
Technically speaking, they have two important defects. Firstly, sometimes shutting power off is not necessary because during a cooking time people leaving cooking area does not always mean that a fire accident will happen inevitably. If cooking is going on normally, it is not necessary to shut the power of electric cooking appliances off after a pre-set time. Secondly sometimes shutting the power off is not effective. If a fire accident of electric cooking appliance happens after people leaving and before the pre-set time of power off, these devices can do nothing. In addition, these devices use a cable to transmit control signal, it restricts the installation flexibility of these devices. Users have to often input pre-set time on these devices, it brings inconvenience for users.
OBJECTIVE AND ADVANTAGES
The object of this present invention is to provide a power-off device to avoid fire accidents of electric cooking appliances and electric dryers necessarily, effectively and conveniently. It is practicable to achieve a device of this invention by directly integrating and assembling conventional smoke/temperature alarm, wireless remote switch, wireless remote control and a few other electronic parts.
SUMMARY OF THE INVENTION
According to the present invention, the power-off device comprises a control-execution unit, at least one smoke/temperature detector and at least one power-on reset controller. The communication between the control-execution unit and the smoke/temperature detector is based on wireless signal transmission. The communication between the control-execution unit and the power-on reset controller is based on either wireless signal transmission or wired signal transmission.
According to the present invention, the smoke/temperature detector continues to detect the smoke and temperature around electric cooking appliances or electric dryers in every moment; when the smoke or temperature reaches a dangerous level, the detector transmits a wireless alarm signal. Once receiving the wireless alarm signal from the detector, the control-execution unit immediately shuts the power supply of electric cooking appliances or electric dryers off so that the overheating or overdrying will not happen. At least one power-on reset controller is used for restoring the power supply.
The control-execution unit can be separated with electric cooking appliances or electric
During a cooking time, if people leave cooking area so that the motion sensor can't receive the motion signal from people anymore, the power of electric cooking appliances will be shut off after a pre-set time. These devices prevent fire accidents of electric cooking appliances in this way.
Technically speaking, they have two important defects. Firstly, sometimes shutting power off is not necessary because during a cooking time people leaving cooking area does not always mean that a fire accident will happen inevitably. If cooking is going on normally, it is not necessary to shut the power of electric cooking appliances off after a pre-set time. Secondly sometimes shutting the power off is not effective. If a fire accident of electric cooking appliance happens after people leaving and before the pre-set time of power off, these devices can do nothing. In addition, these devices use a cable to transmit control signal, it restricts the installation flexibility of these devices. Users have to often input pre-set time on these devices, it brings inconvenience for users.
OBJECTIVE AND ADVANTAGES
The object of this present invention is to provide a power-off device to avoid fire accidents of electric cooking appliances and electric dryers necessarily, effectively and conveniently. It is practicable to achieve a device of this invention by directly integrating and assembling conventional smoke/temperature alarm, wireless remote switch, wireless remote control and a few other electronic parts.
SUMMARY OF THE INVENTION
According to the present invention, the power-off device comprises a control-execution unit, at least one smoke/temperature detector and at least one power-on reset controller. The communication between the control-execution unit and the smoke/temperature detector is based on wireless signal transmission. The communication between the control-execution unit and the power-on reset controller is based on either wireless signal transmission or wired signal transmission.
According to the present invention, the smoke/temperature detector continues to detect the smoke and temperature around electric cooking appliances or electric dryers in every moment; when the smoke or temperature reaches a dangerous level, the detector transmits a wireless alarm signal. Once receiving the wireless alarm signal from the detector, the control-execution unit immediately shuts the power supply of electric cooking appliances or electric dryers off so that the overheating or overdrying will not happen. At least one power-on reset controller is used for restoring the power supply.
The control-execution unit can be separated with electric cooking appliances or electric
- 3 -dryers; the connection with electric cooking appliances or electric dryers is achieved through a power supply cable. For instance, there is a power outlet on the control-execution unit; the connection can be achieved by plugging the plug of electric cooking appliances or electric dryers into this outlet. The control-execution unit receives electricity from power output in room. There still is another way to use the control-execution unit. The control-execution unit can be fixed on or inside electric cooking appliances or electric dryers. In this case, it can be arranged and used as a component of electric cooking appliances or electric dryers. For instance, the power input of electric cooking appliances or electric dryers can be firstly introduced to the control-execution unit, and then introduced to electric cooking appliances or electric dryers from the unit. When the control-execution unit is equipped with an appropriate power connection terminal, the original power connection terminal in electric cooking appliances or electric dryers will not be needed.
Besides the parts used for the purposes above-mentioned, the control-execution unit comprises at least an electrically operated switching device, typically a latching relay, used for executing power on and off, at least a wireless remote switch used for controlling the electrically operated switching device, and a power module used for operating the electrically operated switching device and wireless remote switch. All these parts used are conventional electronic products, which can be purchased from the market or assembled by oneself according to prior technology. When adopting a wireless remote switch, make sure that it uses the same wireless frequency as the smoke/temperature detector and wireless power-on reset controller are using, and it is able to be compatible with the wireless encoding types used by the smoke/temperature detector and wireless power-on reset controller.
The smoke/temperature detector in the present invention is conventional smoke alarm, and smoke-temperature dual function alarm with wireless alarm signal transmission function.
These types of alarms have been used in fire protection engineering for many years. There are
Besides the parts used for the purposes above-mentioned, the control-execution unit comprises at least an electrically operated switching device, typically a latching relay, used for executing power on and off, at least a wireless remote switch used for controlling the electrically operated switching device, and a power module used for operating the electrically operated switching device and wireless remote switch. All these parts used are conventional electronic products, which can be purchased from the market or assembled by oneself according to prior technology. When adopting a wireless remote switch, make sure that it uses the same wireless frequency as the smoke/temperature detector and wireless power-on reset controller are using, and it is able to be compatible with the wireless encoding types used by the smoke/temperature detector and wireless power-on reset controller.
The smoke/temperature detector in the present invention is conventional smoke alarm, and smoke-temperature dual function alarm with wireless alarm signal transmission function.
These types of alarms have been used in fire protection engineering for many years. There are
-4 -many such alarm products in the market; some of them can send wireless alarm signal and sound alarm at the same time. The smoke/temperature detector used can be purchased from the market or assembled by oneself according to prior technology. In order to ensure an effective wireless communication with the wireless remote switch in the control-execution unit, the both have to work in the same wireless frequency and use the same or acceptable encoding type. The detector can be fixed around and above electric cooking appliances or electric dryers typically on the ceiling above them. For electric dryers, the detector especially temperature detector can be fixed inside the drum of electric dyers.
The power-on reset controller in this invention can be a wireless remote control. In order to ensure an effective wireless communication with the wireless remote switch in the control-execution unit, the both have to work in the same wireless frequency and use the same or acceptable encoding type. Such wireless remote controls can be purchased from the market or assembled by oneself according to prior technology. In many cases, such wireless remote controls are sold together with the wireless remote switches in pairs. Also, the power-on reset controller in this invention can be an electrical switch; it communicates with the control -execution unit through a cable.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be described in more detail hereinafter by means of the preferred embodiment with reference to the following figures:
Fig. I shows all the components of the preferred embodiment.
Fig. 2 shows power outlet (socket side) and wireless remote switch used in the preferred embodiment.
Fig. 3 shows power outlet (connection terminal side) and power module used in the preferred embodiment.
The power-on reset controller in this invention can be a wireless remote control. In order to ensure an effective wireless communication with the wireless remote switch in the control-execution unit, the both have to work in the same wireless frequency and use the same or acceptable encoding type. Such wireless remote controls can be purchased from the market or assembled by oneself according to prior technology. In many cases, such wireless remote controls are sold together with the wireless remote switches in pairs. Also, the power-on reset controller in this invention can be an electrical switch; it communicates with the control -execution unit through a cable.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be described in more detail hereinafter by means of the preferred embodiment with reference to the following figures:
Fig. I shows all the components of the preferred embodiment.
Fig. 2 shows power outlet (socket side) and wireless remote switch used in the preferred embodiment.
Fig. 3 shows power outlet (connection terminal side) and power module used in the preferred embodiment.
-5 -Fig. 4 shows power outlet (connection terminal side) and latching relay used in the preferred embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In Fig. 1, 1 is a control-execution unit. 2 is a wireless remote control, which is used as the power-on reset controller here. 3 is a smoke/temperature combined detector with wireless alarm signal transmission function. 2 and 3 all work in the wireless frequency of 433MHZ and use the wireless encoding of EV1527. 4 is a power plug that is connecting with the control-execution unit through a power cable; AC power supply is input to the control-execution unit by plugging 4 into a power outlet in room. 5 is a power outlet fixed on the control-execution unit; power supply is output to electric cooking appliances through it.
3 is installed on the ceiling above electric cooking appliances; do not install it too close to electric cooking appliances so as to reduce false alarms. When the smoke or temperature reaches a dangerous level, 3 will transmit a wireless alarm signal. Once receiving this wireless Is alarm signal, 1 will immediately shut off the power output on 5. 2 is used for restoring the power supply. Pressing the RESET button on 2 will transmit a wireless signal, I can restore the power output on 5 according to this RESET signal.
In Fig. 2, 5 is the power outlet mentioned above. 6 is a wireless remote switch, it works in wireless frequency of 433MHZ and is able to compatible with wireless encoding of EV1527. 6 has two sets of normally open output channels. The first channel is connected with the "Switch Off' controlling coil of the latching relay (8, showed in Fig. 4); the second channel is connected with the "Switch On" controlling coil of the relay. When
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In Fig. 1, 1 is a control-execution unit. 2 is a wireless remote control, which is used as the power-on reset controller here. 3 is a smoke/temperature combined detector with wireless alarm signal transmission function. 2 and 3 all work in the wireless frequency of 433MHZ and use the wireless encoding of EV1527. 4 is a power plug that is connecting with the control-execution unit through a power cable; AC power supply is input to the control-execution unit by plugging 4 into a power outlet in room. 5 is a power outlet fixed on the control-execution unit; power supply is output to electric cooking appliances through it.
3 is installed on the ceiling above electric cooking appliances; do not install it too close to electric cooking appliances so as to reduce false alarms. When the smoke or temperature reaches a dangerous level, 3 will transmit a wireless alarm signal. Once receiving this wireless Is alarm signal, 1 will immediately shut off the power output on 5. 2 is used for restoring the power supply. Pressing the RESET button on 2 will transmit a wireless signal, I can restore the power output on 5 according to this RESET signal.
In Fig. 2, 5 is the power outlet mentioned above. 6 is a wireless remote switch, it works in wireless frequency of 433MHZ and is able to compatible with wireless encoding of EV1527. 6 has two sets of normally open output channels. The first channel is connected with the "Switch Off' controlling coil of the latching relay (8, showed in Fig. 4); the second channel is connected with the "Switch On" controlling coil of the relay. When
6 receives the alarm signal from the detector, its first output channel becomes closed for several seconds so that the "Switch Off' controlling coil is powered on for several seconds. When 6 receives the RESET signal from the power-on reset controller, the second channel becomes closed for =
several seconds so that the "Switch On" controlling coil is powered on for several seconds.
In Fig. 3, 5 is the power outlet mentioned above, now it is being shown from its connection terminal side. Except for one live wire, other wires used for inputting AC power supply are fixed on its connection terminal. 7 is a power module, which is able to output IA
12VDC to the wireless remote switch and the latching relay as their power.
In Fig. 4, 5 is the power outlet mentioned in the above paragraph. 8 is a latching relay with a current-carrying capability of 100A 240 VAC. The latching relay has one set of output terminal. The ON/OFF status of this output terminal is controlled by two controlling coils inside the relay. When "Switch ON" controlling coil is powered on for several seconds, the output terminal will be in and keep "ON" ; when "Switch OFF" controlling coil is powered on for several seconds, the output terminal will be in and keep "OFF". The exceptive live wire mentioned in the above paragraph is firstly introduced to the output terminal of 8 and then introduced to the connection terminal of 5. As a result, the power output on 5 is controlled by the latching relay, and finally controlled by the smoke/temperature detector and the power-on reset controller.
The foregoing descriptions of preferred embodiments of the present invention have been presented for purposes of illustration and description only. They are not intended to be exhaustive or to limit the present invention. Accordingly, many modifications or variations will be possible in light of the above teaching. The scope of the present invention is defined by the appended claims.
several seconds so that the "Switch On" controlling coil is powered on for several seconds.
In Fig. 3, 5 is the power outlet mentioned above, now it is being shown from its connection terminal side. Except for one live wire, other wires used for inputting AC power supply are fixed on its connection terminal. 7 is a power module, which is able to output IA
12VDC to the wireless remote switch and the latching relay as their power.
In Fig. 4, 5 is the power outlet mentioned in the above paragraph. 8 is a latching relay with a current-carrying capability of 100A 240 VAC. The latching relay has one set of output terminal. The ON/OFF status of this output terminal is controlled by two controlling coils inside the relay. When "Switch ON" controlling coil is powered on for several seconds, the output terminal will be in and keep "ON" ; when "Switch OFF" controlling coil is powered on for several seconds, the output terminal will be in and keep "OFF". The exceptive live wire mentioned in the above paragraph is firstly introduced to the output terminal of 8 and then introduced to the connection terminal of 5. As a result, the power output on 5 is controlled by the latching relay, and finally controlled by the smoke/temperature detector and the power-on reset controller.
The foregoing descriptions of preferred embodiments of the present invention have been presented for purposes of illustration and description only. They are not intended to be exhaustive or to limit the present invention. Accordingly, many modifications or variations will be possible in light of the above teaching. The scope of the present invention is defined by the appended claims.
Claims (6)
1. A power-off device to avoid fire accidents of electric cooking appliances and electric dryers comprises: a control-execution unit, at least one smoke/temperature detector and at least one power-on reset controller. The communication between the control-execution unit and the smoke/temperature detector is based on wireless signal transmission. The communication between the control-execution unit and the power-on reset controller is based on either wireless signal transmission or wired signal transmission.
2. The power-off device of claim 1, wherein said control-execution unit comprises at least an electrically operated switching device and at least a wireless remote switch. All the parts can be installed together in one box or installed separately in more boxes.
3. The power-off device of claim 1, wherein said control-execution unit can be separated with electric cooking appliances or dryers. Also, the control-execution unit can be fixed on or inside electric cooking appliances or dryers and be treated as a component of electric cooking appliances or dryers.
4. The electrically operated switching device of claim 2 and 3 is latching relay.
5. The power-off device of claim 1, wherein said smoke/temperature detector is conventional smoke alarm with wireless alarm signal transmission or conventional smoke and temperature dual function alarm with wireless alarm signal transmission.
6. The power-off device of claim 1, wherein said power-on reset controller is either conventional wireless remote control or conventional wired electrical switch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201461928338P | 2014-01-16 | 2014-01-16 | |
| US61/928,338 | 2014-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2878762A1 true CA2878762A1 (en) | 2015-07-16 |
Family
ID=53546324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2878762A Abandoned CA2878762A1 (en) | 2014-01-16 | 2015-01-16 | A power off device to avoid fire accidents of electric cooking appliances and electric dryers |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2878762A1 (en) |
-
2015
- 2015-01-16 CA CA2878762A patent/CA2878762A1/en not_active Abandoned
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| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20190116 |