CN2285940Y - Time delay switch for electric appliance - Google Patents
Time delay switch for electric appliance Download PDFInfo
- Publication number
- CN2285940Y CN2285940Y CN 97201905 CN97201905U CN2285940Y CN 2285940 Y CN2285940 Y CN 2285940Y CN 97201905 CN97201905 CN 97201905 CN 97201905 U CN97201905 U CN 97201905U CN 2285940 Y CN2285940 Y CN 2285940Y
- Authority
- CN
- China
- Prior art keywords
- positive temperature
- temperature coefficient
- coefficient resistor
- electrical appliance
- parallel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a time delay switch for an electric appliance. A contact switch circuit is connected with a positive temperature coefficient resistor (PTC) in parallel, or meantime, both the electric connecting ends of an electric appliance are connected with a positive temperature coefficient resistor (PTC) in parallel. The utility model has wide range of application, few components, simple wiring connection without electric harmonic fire striking phenomenon, low cost, and high safety.
Description
The utility model relates to employed delay switch on a kind of electrical equipment.
At present, the standard machinery switch that uses on the general electrical equipment is the two-point contact-making switch, its contact and disconnection be the break-make of control electrical appliance operating current directly, but some electrical appliance still needs to delay time one section when working after switch disconnects, light control as bedroom, corridor, after contact-making switch disconnected, lamp went out immediately, the light of can't delaying time.Simultaneously, existing delay switch only is applicable to incandescent lamp, and its required components and parts are many, the wiring complexity, and installation, maintenance is extremely inconvenient.
The purpose of this utility model be to overcome the problem that prior art exists and design that a kind of required components and parts are few, wiring and installation electrical equipment delay switch simple, applied widely; it had not both had electric harmonic wave, spark phenomenon; protect contact-making switch and electric equipment again, can reach safe and convenient to use.
The purpose of this utility model is achieved in that a kind of electrical equipment delay switch, a positive temperature coefficient resistor (PTC) in parallel on the touch switch circuit that between electrical appliance and power supply, is connected, when electrical appliance be capacitive properties or during special electrical appliance such as fluorescent lamp, a positive temperature coefficient resistor (PTC) in parallel on touch switch circuit connects a positive temperature coefficient resistor (PTC) in parallel on the electric two ends at electrical appliance again simultaneously.Its operation principle is that electric current flows through electrical appliance by switch and constitutes the electricity consumption loop, the electrical appliance operate as normal when contact-making switch is closed.When contact-making switch disconnects, electric current flows through electrical appliance through positive temperature degree coefficient resistance (PTC) and constitutes the electricity consumption loop, electrical appliance works on, along with electric current passes through positive temperature coefficient resistor after a period of time, the positive temperature coefficient resistor temperature rises, after reaching Curie point, its resistance value increases rapidly, the loop current that is made of positive temperature coefficient resistor and electrical appliance reduces rapidly, electrical appliance be owing to can't work on after operating current reduces to certain value, and positive temperature coefficient resistor only needs minimum electric current to keep himself resistance value and electrical appliance is no longer worked.As when electrical appliance be capacitive properties or during special electrical equipment such as fluorescent lamp, after contact-making switch disconnects, simultaneously again by be connected in parallel on electrical appliance connect positive temperature coefficient resistor on the electric two ends offer the positive temperature coefficient resistor that is connected in parallel on the touch switch circuit required keep electric current.
The utility model has the advantages that; 1, overcome the limitation that existing delay switch only is applicable to resistive or perceptual electrical appliance; 2, circuit is simple, and components and parts are few; 3, there are not electric harmonic wave, spark phenomenon, safe and reliable.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is first embodiment circuit theory diagrams of the utility model.
Fig. 2 is second embodiment circuit theory diagrams of the utility model.
Among the embodiment as shown in Figure 1, a kind of electrical equipment delay switch, positive temperature coefficient resistor 1 in parallel on the contact-making switch K1 circuit that between electrical appliance R3 and power supply V, is connected.
Among another embodiment as shown in Figure 2, a kind of electrical equipment delay switch, positive temperature coefficient resistor R1 in parallel on the contact-making switch K1 circuit that is connected between electrical appliance R3 and power supply V meets another positive temperature coefficient resistor R2 in parallel on the electric two ends at electrical appliance R3 again simultaneously.
In the above-described embodiments, under the normal temperature situation, positive temperature coefficient resistor R1 is tens ohms, and R2 is 600-1000 ohm or other resistive, perceptual components and parts.
Claims (2)
1, a kind of electrical equipment delay switch is characterized in that: be parallel with a positive temperature coefficient resistor R1 on the contact-making switch K1 circuit that is connected between electrical appliance R3 and the power supply V.
2, delay switch according to claim 1 is characterized in that: electrical appliance R3 connects and is parallel with a positive temperature coefficient resistor R2 on the electric two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97201905 CN2285940Y (en) | 1997-03-21 | 1997-03-21 | Time delay switch for electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97201905 CN2285940Y (en) | 1997-03-21 | 1997-03-21 | Time delay switch for electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2285940Y true CN2285940Y (en) | 1998-07-08 |
Family
ID=33923197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97201905 Expired - Fee Related CN2285940Y (en) | 1997-03-21 | 1997-03-21 | Time delay switch for electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2285940Y (en) |
-
1997
- 1997-03-21 CN CN 97201905 patent/CN2285940Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |