CN209766279U

CN209766279U - Timer delay circuit

Info

Publication number: CN209766279U
Application number: CN201920686788.4U
Authority: CN
Inventors: 王祖卫
Original assignee: Hangzhou Tianma Time Control Polytron Technologies Inc
Current assignee: Hangzhou Tianma Time Control Polytron Technologies Inc
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2019-12-10
Anticipated expiration: 2029-05-15

Abstract

The utility model discloses a timer delay circuit, which comprises a delay conducting circuit consisting of a first resistor R1, a second resistor R2, a diode D1, a capacitor C1, a voltage regulator tube Z1 and a relay RY 1; the relay RY1 is characterized in that a first resistor R1, a second resistor R2 and a diode D1 are connected in series and then connected in parallel with a capacitor C1, a voltage regulator tube Z1 and a relay RY1, the relay RY1 further comprises a third resistor R3 and a fourth resistor R4, the third resistor R3 and the fourth resistor R4 are connected in parallel between an output terminal and an input terminal, when the relay RY1 is not attracted, power is supplied to a load through the third resistor R3 and the fourth resistor R4, when the relay RY1 is attracted, a subsequent electrical appliance RY1 contact is in short circuit with the third resistor R3 and the fourth resistor R4, large current passes through the relay RY 2 contact, the ACN terminal is a power supply common end of a timer, and the input terminal and the output terminal are connected in series into a timer load. The timer delay circuit can reduce the contact carbonization probability and prolong the service life of the contact.

Description

Timer delay circuit

The technical field is as follows:

the utility model relates to a timer field specifically says to a timer delay circuit.

Background art:

The existing microwave oven timer can generate instantaneous high voltage between the contacts when the contacts are switched on due to the existence of inductance in the circuit, and the high voltage can break through air between the contacts to generate electric arc. When the timer contacts are connected, the timer contacts are not instantly connected but are gradually connected, and in a connection-like or disconnection-like state, high heat is generated at the local parts of the contacts, and air is conducted to form an arc due to the existence of voltage, so that the contact points are blackened.

The utility model has the following contents:

The utility model aims to solve the technical problem that a reduce contact carbonization probability is provided, contact life's timer delay circuit is increased, and this timer delay circuit can improve the reliability of timer.

the technical solution of the utility model is to provide a timer delay circuit, include a delay conduction circuit that comprises first resistance R1, second resistance R2, diode D1, electric capacity C1, stabilivolt Z1 and relay RY 1; the relay RY1 is characterized in that a first resistor R1, a second resistor R2 and a diode D1 are connected in series and then connected in parallel with a capacitor C1, a voltage regulator tube Z1 and a relay RY1, the relay RY1 further comprises a third resistor R3 and a fourth resistor R4, the third resistor R3 and the fourth resistor R4 are connected in parallel between an output terminal and an input terminal, when the relay RY1 is not attracted, power is supplied to a load through the third resistor R3 and the fourth resistor R4, when the relay RY1 is attracted, a subsequent electrical appliance RY1 contact is in short circuit with the third resistor R3 and the fourth resistor R4, large current passes through the relay RY 2 contact, the ACN terminal is a power supply common end of a timer, and the input terminal and the output terminal are connected in series into a timer load.

Compared with the prior art after the structure more than adopting, the utility model has the advantages of it is following: the voltage between the contacts is reduced through the resistor in the delay resistance value and then is contacted, so that the intensity of an electric arc formed by conducting in the starting period due to the existence of high voltage is reduced, the carbonization probability of the contacts is reduced, the service life of the contacts is prolonged, and the reliability of the timer is improved.

Preferably, the capacitor C1 is an electrolytic capacitor.

Description of the drawings:

Fig. 1 is a schematic circuit diagram of the present invention.

The specific implementation mode is as follows:

the invention will be further explained with reference to the drawings and the detailed description below:

as shown in fig. 1, a timer delay circuit includes a delay conducting circuit composed of a first resistor R1, a second resistor R2, a diode D1, a capacitor C1, a voltage regulator tube Z1 and a relay RY 1; the relay RY1 is characterized in that a first resistor R1, a second resistor R2 and a diode D1 are connected in series and then connected in parallel with a capacitor C1, a voltage regulator tube Z1 and a relay RY1, the relay RY1 further comprises a third resistor R3 and a fourth resistor R4, the third resistor R3 and the fourth resistor R4 are connected in parallel between an output terminal and an input terminal, when the relay RY1 is not attracted, power is supplied to a load through the third resistor R3 and the fourth resistor R4, when the relay RY1 is attracted, a contact of a subsequent electrical appliance RY1 is short-circuited with the third resistor R3 and the fourth resistor R4, large current passes through a contact of the relay RY 2, the process similar to soft start is achieved, the ACN terminal is a power supply common end of the timer, and the input terminal and the output terminal are connected in series in a timer load. The voltage between the contacts is reduced through the resistor in the delay resistance value and then is contacted, so that the intensity of an electric arc formed by conducting in the starting period due to the existence of high voltage is reduced, the carbonization probability of the contacts is reduced, the service life of the contacts is prolonged, and the reliability of the timer is improved. The capacitor C1 is an electrolytic capacitor, and the relay is a normally open relay. Specific parameters in the delay circuit can be seen in fig. 1.

The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. All the equivalent structures or equivalent flow changes made by using the contents of the specification and the attached drawings of the utility model are included in the patent protection scope of the utility model.

Claims

1. A timer delay circuit, comprising: the circuit comprises a delay conducting circuit consisting of a first resistor R1, a second resistor R2, a diode D1, a capacitor C1, a voltage regulator tube Z1 and a relay RY 1; the relay RY1 is characterized in that a first resistor R1, a second resistor R2 and a diode D1 are connected in series and then connected in parallel with a capacitor C1, a voltage regulator tube Z1 and a relay RY1, the relay RY1 further comprises a third resistor R3 and a fourth resistor R4, the third resistor R3 and the fourth resistor R4 are connected in parallel between an output terminal and an input terminal, when the relay RY1 is not attracted, power is supplied to a load through the third resistor R3 and the fourth resistor R4, when the relay RY1 is attracted, a subsequent electrical appliance RY1 contact is in short circuit with the third resistor R3 and the fourth resistor R4, large current passes through the relay RY 2 contact, the ACN terminal is a power supply common end of a timer, and the input terminal and the output terminal are connected in series into a timer load.

2. The timer delay circuit of claim 1, wherein: the capacitor C1 is an electrolytic capacitor.