CN217792636U

CN217792636U - One-key reheating circuit and sandwich machine

Info

Publication number: CN217792636U
Application number: CN202221675408.5U
Authority: CN
Inventors: 张技央
Original assignee: Ningbo Orchid Electric Appliances Manufacturing Co ltd
Current assignee: Ningbo Orchid Electric Appliances Manufacturing Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-11-15
Anticipated expiration: 2032-06-30
Also published as: WO2024001027A1

Abstract

The utility model discloses a one-key reheating circuit and a sandwich machine comprising the same; the one-key reheating circuit comprises a heating circuit, a timing circuit and a reheating circuit, wherein the reheating circuit is used for bypassing the timing circuit to restart the heating circuit; the reheating circuit includes: a delay circuit, a rectification filter circuit and a relay; the rectification filter circuit is electrically connected with the delay circuit, the delay circuit is electrically connected with the relay, and the relay is electrically connected with the timing circuit and the heating circuit. The utility model has the advantages of it is following and effect: the reheating circuit is additionally arranged on the basis of normal mechanical timing and consists of a time delay circuit, so that the conduction time of the circuit can be controlled to be about 30 seconds, the sandwich machine can heat quickly within seconds, and food can be reheated and not burnt out.

Description

One-key reheating circuit and sandwich machine

Technical Field

The utility model relates to a circuit is regularly technical field, in particular to a key reheating circuit.

Background

A sandwich machine is one of breakfast machines, and is a cooking machine that uses a baking tray to heat food; the sandwich machine realizes the baking or frying of food by heating the baking tray through the heating wire.

The common sandwich machine has a timing function, and the heating is stopped after the set time is reached; however, the conventional mechanical timing function can only time to minutes, but cannot time to seconds. That is, if there are other reasons to cool the food, the food which is desired to be heated and eaten very hot can only be reheated by other machines such as a microwave oven, and the secondary heating by the sandwich machine is because the power of the electric heating wire of the sandwich machine is large and can only be timed to easily scorch the food.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a key reheating circuit increases a key reheating circuit on the mechanical timing circuit basis of conventionality again for solve conventional mechanical timing function and can only regularly arrive the minute and can not be accurate to the shortcoming of second.

The above technical object of the present invention can be achieved by the following technical solutions: the one-key reheating circuit comprises a heating circuit, a timing circuit and a reheating circuit, wherein the reheating circuit is used for bypassing the timing circuit to restart the heating circuit; the reheating circuit includes: a delay circuit, a rectification filter circuit and a relay; the rectification filter circuit is electrically connected with the delay circuit, the delay circuit is electrically connected with the relay, and the relay is electrically connected with the timing circuit and the heating circuit.

By adopting the technical scheme, the mechanical timer and the temperature controller are bypassed, so that the machine is reheated.

The utility model discloses a further set up to: the relay comprises a common point C, a normally closed point NC and a normally open point NO; the common point C is electrically connected with the cathode of the power supply, the normally closed point NC is electrically connected with the timing circuit, and the normally open point NO is electrically connected with the heating circuit.

By adopting the technical scheme, the heating circuit is switched between the mechanical timing circuit and the chip delay circuit through the relay, so that long-time heating within 30 minutes and short-time heating within 30 seconds can be performed.

The utility model discloses a further set up to: the rectification filter circuit is used for converting alternating current of a power supply into direct current.

Whether the delay circuit or the relay is made of a direct current voltage, it is necessary to convert the alternating current into a direct current.

The utility model discloses a further set up to: the relay further comprises a coil, the coil is electrically connected with the delay circuit, the coil is attracted to be normally opened and switched on, and the coil is disconnected to be normally closed and switched on.

By adopting the technical scheme, the time delay circuit controls the coil to realize switching conduction between the normally open point and the normally closed point

The utility model discloses a further set up to: the delay circuit comprises a chip, a capacitor C1, a capacitor C3, an adjustable resistor RT, an indicator light J1KEY, a reheating switch J1REHEAT and a triode.

The utility model discloses a further set up to: the chip model is EN555, the triode model is S8050.

The utility model discloses a further set up to: the chip is grounded through a pin 1, the chip is electrically connected with the indicator light J1KEY through a pin 2, the chip is electrically connected with the base electrode of the triode through a pin 3, the chip is electrically connected with the output anode of the rectifying and filtering circuit through a pin 4, the chip is connected with a pin 7 in parallel with a pin 6, the chip is electrically connected with the output anode of the rectifying and filtering circuit through a pin 8, and the chip is powered through a pin 8.

By adopting the technical scheme, the EN555 chip forms the delay circuit.

A sandwich comprising the above-mentioned one-key reheating circuit.

The utility model discloses there is following: the reheating circuit is added on the basis of normal mechanical timing, and consists of a delay circuit, so that the conduction time of the circuit can be controlled to be about 30 seconds, the sandwich machine can rapidly heat in seconds, and the food can be reheated and not burnt out.

Drawings

Fig. 1 is a block diagram of a one-touch reheat circuit configuration.

Fig. 2 is an overall circuit schematic of a one-touch reheat circuit.

Fig. 3 is a circuit diagram of a rectifying-filtering circuit.

Fig. 4 is a circuit diagram of a delay circuit and a relay.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meaning of the above terms in the present invention can be understood as specific cases to those skilled in the art; the heating circuit and the timing circuit are in the prior art, so that functional terms are used for representation, simple symbols are used in the drawings, and specific circuit structures of the heating circuit and the timing circuit are not described in the specification.

The one-key reheating circuit is shown in fig. 1 and 2 and comprises a heating circuit, a timing circuit and a reheating circuit; the reheating circuit comprises a rectifying and filtering circuit, a delay circuit and a relay; when heating for the first time, the power supply is switched on, the current sequentially passes through the heating circuit, the timing circuit and the relay normally-closed point NC and then returns to the power supply through the relay common point C to form a closed circuit, and the heating circuit starts to heat; when the set time is reached, the timer is disconnected, the circuit is broken, and the heating is stopped.

The reheating circuit comprises a rectifying and filtering circuit, a delay circuit and a relay; the rectification filter circuit is used for converting alternating current into direct current and providing a direct current power supply for the delay circuit and the relay; the delay circuit realizes delay start-stop in seconds through a chip and a circuit structure; the relay is used for switching the heating circuit between the mechanical timing and the reheating timing. When the reheating function is started, the relay coil is electrified to attract the normally-open point NO and the common point C to be connected, the current sequentially passes through the heating circuit, the relay normally-open point NO and the common point C, the reflux power supply forms a closed circuit, heating is started, when the time delay circuit acts, the relay coil is electrified, the normally-open point NO is disconnected, and heating is stopped.

As shown in fig. 3, the rectifying and filtering circuit includes a rectifying portion and a filtering portion, and the filtering portion includes a first resistor, a second resistor and a filtering capacitor C4; the rectifying part adopts bridge type filtering. The rectifier filter circuit is designed to convert an alternating current voltage into a 12V direct current voltage, and can also convert the alternating current voltage into a low-voltage direct current voltage in an application range of 24V, 36V and the like.

As shown in fig. 4, the delay circuit includes a chip, a capacitor C1, a capacitor C3, an adjustable resistor RT, an indicator light J1KEY, a reheating switch J1REHEAT and a triode; the type of the triode is S8050, the type of the chip is EN555, one end of the capacitor C1 is electrically connected with the output cathode of the rectifying and filtering circuit, and the other end of the capacitor C1 is electrically connected with one end of the adjustable resistor RT; the other end of the adjustable resistor RT is electrically connected with the output anode of the rectifying and filtering circuit; one end of the capacitor C3 is electrically connected with the output cathode of the rectifying and filtering circuit, and the other end of the capacitor C3 is electrically connected with a pin 5 of the chip; one end of a chip 6 pin is electrically connected with an adjustable resistor RT and is connected with a capacitor C1 in parallel, a chip 1 pin is grounded, a chip 2 pin is electrically connected with an indicator lamp J1KEY, a chip 3 pin is electrically connected with a triode base, and a chip 4 pin is electrically connected with an output anode of a rectifying and filtering circuit; the pin 7 of the chip is connected with the pin 6 of the chip in parallel, and the pin 8 of the chip is electrically connected with the output anode of the rectifying and filtering circuit; the collector electrode of the triode is electrically connected with the output positive electrode of the rectifying and filtering circuit, the emitter electrode of the triode is electrically connected with the positive electrode of the relay, and the triode is conducted as a switch to provide direct current for the coil of the relay.

The utility model discloses a basic operating principle does:

1. when the reheating function is not used, the zero line of the power supply is connected with the common point C of the relay, the normally closed point NC is communicated with the common point C, the normally closed point NC is connected with the timing circuit, the live wire of the power supply is connected with the heating circuit, the electric heating circuit is connected with the timing circuit, the current forms a loop, and the machine enters a normal working state.

2. When the reheating function is used, a reheating switch J1REHEAT is pressed down, an indicator light J1KEY is lighted, meanwhile, 2 pins of a chip receive level to trigger the chip to work, 3 pins of the chip output level, the base electrode of a triode receives the level, the triode is conducted, a relay coil is electrified, the relay normally-open point NO is attracted, the normally-closed point NC is disconnected, the normally-open point NO is conducted with a common point C, the normally-open point NO is connected with a heating circuit, the current bypasses a timing circuit at the moment, and the machine is directly heated. 12V direct current voltage charges for electric capacity C1 through adjustable resistance RT, and 6 feet of chip electric potentials rise, and when 6 feet of chip electric potentials rise to the same with 5 feet of chip electric potentials, the time delay circuit resets, and the chip forms the steady state, and 3 feet of chip have NO level output, and the triode base is NO signal, and the triode breaks off, and relay coil loses the electricity and breaks off, and normally open point NO breaks off, stops heating. The charging speed of the capacitor C1 is related to the resistance value of the adjustable resistor RT, when the resistance value of the RT is the maximum, the charging time is the longest, namely the reheating time is the longest, the resistance value of the RT is the maximum of 500K, and the time can be delayed for more than 30 seconds.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. A reheat circuit, including heating circuit, timing circuit, characterized by: the reheating circuit is used for bypassing the timing circuit to restart the heating circuit; the reheating circuit includes: a delay circuit, a rectification filter circuit and a relay; the rectification filter circuit is electrically connected with the delay circuit, the delay circuit is electrically connected with the relay, and the relay is electrically connected with the timing circuit and the heating circuit.

2. The one-touch reheating circuit of claim 1, wherein: the relay comprises a common point C, a normally closed point NC and a normally open point NO; the common point C is electrically connected with the cathode of the power supply, the normally closed point NC is electrically connected with the timing circuit, and the normally open point NO is electrically connected with the heating circuit.

3. The one-touch reheat circuit of claim 1, wherein: the rectification filter circuit is used for converting alternating current of a power supply into direct current.

4. The one-touch reheat circuit of claim 2, wherein: the relay further comprises a coil, the coil is electrically connected with the delay circuit, the coil is attracted to be normally opened and switched on, and the coil is disconnected to be normally closed and switched on.

5. The one-touch reheat circuit of claim 1, wherein: the delay circuit comprises a chip, a capacitor C1, a capacitor C3, an adjustable resistor RT, an indicator light J1KEY, a reheating switch J1REHEAT and a triode.

6. The one-touch reheating circuit of claim 5, wherein: the chip model is EN555, the triode model is S8050.

7. The one-touch reheat circuit of claim 5, wherein: a pin 1 of the chip is grounded, a pin 2 of the chip is electrically connected with the indicator light J1KEY, a pin 3 of the chip is electrically connected with the base electrode of the triode, a pin 4 of the chip is electrically connected with the output anode of the rectifying and filtering circuit, a pin 7 of the chip is connected with a pin 6 of the chip in parallel, a pin 8 of the chip is electrically connected with the output anode of the rectifying and filtering circuit, and a pin 8 of the chip provides power for the power pin of the chip.

8. A sandwich machine, its characterized in that: comprising the one-touch reheat circuit of any of claims 1-7.