CN202843363U - Electric cooker timer - Google Patents

Abstract

The utility model relates to a timer for an electric rice cooker, which belongs to a timer which cooks rice with electricity according to a set time, and whose electric heating power is adjustable. It is mainly composed of two power-on delay relays, two transfer switches, a rectifier diode and a three-hole socket to form a 220V AC power circuit and a 110V DC power circuit after the half-wave rectification of the above power circuit, so as to heat the rice cooker. When used in conjunction with an electric rice cooker, it not only has the function of delayed cooking, but also has the functions of cooking porridge and soup at low heat. The timer has the characteristics of simple structure, timing automatic cooking, and adjustable power.

Description

electric rice cooker timer

technical field

The utility model relates to a timing device used for controlling electric cooking of an electric rice cooker, in particular an electronic timer which is combined with a three-hole socket for the electric rice cooker to cook rice according to a set time and can control the electric power.

Background technique

When the electric rice cooker is used for cooking, the resistance wire stove plate of the electric rice cooker can be plugged into a 220V power supply and then energized to cook. After the rice is cooked, manually disconnect the power supply. People need to automatically turn on the power at a certain moment and turn on the power to cook rice within a specified time. After the rice is cooked, the power is automatically cut off. However, the power of the electric furnace of the existing electric rice cooker cannot be adjusted, and it cannot be used for long-term heating with low fire or slow fire. Operations, such as cooking porridge or soup or boiling traditional Chinese medicine.

Utility model content

The purpose of the utility model is to provide a timer for an electric rice cooker which can delay automatic cooking and has adjustable power.

The purpose of this new model is achieved in this way: a rice cooker timer, including a three-hole socket CZ, 220V live wire L connected to the first transfer switch K1 moving contact, the first fixed contact a1 of the first transfer switch K1 connected to For the moving contact of the second transfer switch K2, the first fixed contact a2 of the second transfer switch K2 is connected to the first terminal of the three-hole socket CZ, and the second terminal of the three-hole socket CZ is connected to the neutral line N, the second fixed contact b1 of the first transfer switch K1 is connected in series with the normally closed contact 2KT1 of the second energization delay relay 2KT and the first energization delay relay 1KT, and then connected to the neutral line N, the first energization delay One end of the first normally open contact 1KT1 of the time relay 1KT is connected to the node of the normally closed contact 2KT1 of the second energization delay relay 2KT and the first energization delay relay 1KT, and the other end of the first normally open contact 1KT1 is connected in series After connecting the second power-on delay relay 2KT to the neutral line N, the second fixed contact b1 of the first transfer switch K1 is connected in series with the second normally open contact 1KT2 of the first power-on delay relay 1KT and then connected to the second switch The moving contact of the switch K2, the first fixed contact a2 of the second transfer switch K2 is connected to the first connection terminal of the three-hole socket CZ, the second fixed contact b2 of the second transfer switch K2 is connected to the anode of the 5A diode D, The negative pole of the 5A diode port is connected to the first terminal of the three-hole socket CZ.

A rice cooking indicator light LD is connected between the moving contact of the second transfer switch K2 and the neutral line N.

The first energization delay relay 1KT is also connected in parallel with a power indicator HD.

The beneficial effects of the present invention are:

1. The circuit structure is simple, and the production cost is low. Only two power-on delay relays and a changeover switch are needed, which can be realized by combining with the existing three-hole socket.

2. Automatically turn on the power at the specified time, and automatically turn off the power after the rice is automatically cooked within the set time period, thus completing the entire automatic cooking process.

3. The utility model is specially designed for people who go to work, go to school, and go out to do errands and cannot rush home to cook in time. In addition to the function of delayed cooking, it also has the functions of cooking porridge and soup at low heat. It is used in conjunction with an electric rice cooker, has a simple structure, can automatically cook rice at regular intervals, is easy to promote, and is believed to be used by more and more users.

Description of drawings

Figure 1 is the circuit diagram of this timer.

Detailed ways

Figure 1 shows the rice cooker timer, the 220V live wire L is connected to the moving contact of the first changeover switch K1, the first fixed contact a1 of the first changeover switch K1 is connected to the moving contact of the second changeover switch K2, and the first changeover switch K1 is connected to the moving contact of the second changeover switch K2. The first fixed contact a2 of the second conversion switch K2 is connected to the first terminal of the three-hole socket CZ, the second terminal of the three-hole socket CZ is connected to the neutral line N, and the second fixed contact of the first conversion switch K1 The head b1 is sequentially connected in series with the normally closed contact 2KT1 of the second energization delay relay 2KT and the first energization delay relay 1KT, and then connected to the neutral line N, and one end of the first normally open contact 1KT1 of the first energization delay relay 1KT Connected to the node of the normally closed contact 2KT1 of the second energization delay relay 2KT and the first energization delay relay 1KT, the other end of the first normally open contact 1KT1 is connected in series with the second energization delay relay 2KT and then connected to zero Line N, the second fixed contact b1 of the first transfer switch K1 is connected in series with the second normally open contact 1KT2 of the first energization delay relay 1KT and then connected to the moving contact of the second transfer switch K2, the second transfer switch K2 The first fixed contact a2 of the switch is connected to the first terminal of the three-hole socket CZ, the second fixed contact b2 of the second transfer switch K2 is connected to the positive pole of the 5A diode D, and the negative pole of the 5A diode port is connected to the third terminal of the three-hole socket CZ a terminal block.

A rice cooking indicator light LD is connected between the moving contact of the second transfer switch K2 and the neutral line N.

The first energization delay relay 1KT is also connected in parallel with a power indicator HD.

A second transfer switch and a 5A diode are added to the main circuit of the power supply socket, and the function of cooking porridge and stewing soup at low heat is added.

Under normal circumstances, switch the second changeover switch K2 to directly connect with the three-hole socket, and have normal rice cooking function. Wave rectification circuit) side, the 220V power supply is half-wave rectified and becomes 110V DC, which reduces the power and calorific value of the resistance wire of the original rice cooker when it is energized, and realizes the functions of cooking porridge and soup.

Claims (3)

1. timer for electric cooker, comprise, Three-hole socket CZ, it is characterized in that, 220V live wire L is connected to the first change-over switch K1 moving contact, first of the first change-over switch K1 decides the moving contact that contact a1 is connected to the second change-over switch K2, first of the second change-over switch K2 decides the first binding post that contact a2 is connected to described Three-hole socket CZ, the second binding post of Three-hole socket CZ is connected to zero line N, second of the first change-over switch K1 decides to be connected to zero line N after contact b1 is connected in series the normally closed interlock 2KT1 of the second energization delay relay 2KT and the first energization delay relay 1KT in turn, the first normally open contact 1,KT1 one of the first energization delay relay 1KT is terminated at the normally closed interlock 2KT1 of the second energization delay relay 2KT and the node of the first energization delay relay 1KT, after being connected in series the second energization delay relay 2KT, this first normally open contact 1KT1 other end is connected to zero line N, second of the first change-over switch K1 decides to be connected to behind the second normally open contact 1KT2 that contact b1 is connected in series the first energization delay relay 1KT the moving contact of the second change-over switch K2, first of the second change-over switch K2 decides the first binding post that contact a2 is connected to Three-hole socket CZ, second of the second change-over switch K2 decides contact b2 and is connected to 5A diode D positive pole, and 5A diode mouth negative pole is connected to the first binding post of Three-hole socket CZ.

2. timer for electric cooker according to claim 1 is characterized in that, is connected with the indicator lamp LD that cooks between the moving contact of described the second change-over switch K2 and the zero line N.

3. timer for electric cooker according to claim 2 is characterized in that, described the first energization delay relay 1KT also is parallel with power supply indicator HD.

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