CN215866872U - Power consumption detection circuit and have its cooking utensil - Google Patents
Power consumption detection circuit and have its cooking utensil Download PDFInfo
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- CN215866872U CN215866872U CN202022795635.9U CN202022795635U CN215866872U CN 215866872 U CN215866872 U CN 215866872U CN 202022795635 U CN202022795635 U CN 202022795635U CN 215866872 U CN215866872 U CN 215866872U
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Abstract
The utility model discloses a power consumption detection circuit and a cooking appliance with the same. The circuit comprises a voltage detection circuit, a current detection circuit, a driving module and a control module, wherein the signal output ends of the voltage detection circuit and the current detection circuit are respectively and correspondingly connected with two input ends of the control module; the control module is configured to: the external load is enabled to work by controlling the driving module so as to obtain the sampling current value when the external load works, and the power consumption of the external load is calculated according to the sampling current value and the sampling voltage value. According to the circuit, the sampling current value and the sampling voltage value are directly detected to calculate the power consumption, so that the actual power consumption of the external load can be clearly known.
Description
Technical Field
The utility model relates to the technical field of cooking appliances, in particular to a power consumption detection circuit and a cooking appliance with the same.
Background
The low-carbon environment-friendly cooking utensil is a trend of the current life style of human beings, and the energy conservation becomes an important standard in the technical field of cooking utensils. Energy efficiency grades are marked on existing cooking appliances such as IH electric cookers, and the energy efficiency grades display the amount of power consumption. However, the marked electricity consumption is the electricity consumption obtained by running under a specific program and a standard load, and because the actual cooking food materials are different and the selected program is different, the actual electricity consumption and the marked electricity consumption have a large difference, the user cannot know the actual electricity consumption of the electric cooker under the specific working condition.
Therefore, it is desirable to provide a power consumption detecting circuit and a cooking appliance having the same to at least partially solve the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content of the present invention is not intended to define key features or essential features of the claimed solution, nor is it intended to be used to limit the scope of the claimed solution.
The utility model provides a power consumption detection circuit for a cooking appliance, which comprises:
the cooking appliance comprises a voltage detection circuit, a current detection circuit, a driving module and a control module, wherein the signal output ends of the voltage detection circuit and the current detection circuit are respectively and correspondingly connected with two input ends of the control module, the output end of the control module is connected with the input end of the driving module, and the signal input end of the current detection circuit is connected into a loop formed by the driving module and an external load of the cooking appliance; the control module is configured to: and controlling the driving module to enable the external load to work so as to obtain a sampling current value when the external load works, and calculating the power consumption of the external load according to the sampling current value and the sampling voltage value.
According to the circuit provided by the utility model, the sampling voltage value and the sampling current value can be directly detected through the voltage detection circuit and the current detection circuit so as to calculate the power consumption, so that a user can clearly know the actual power consumption of an external load.
Preferably, the driving module comprises an IGBT power tube, an emitter of the IGBT power tube is grounded, a gate of the IGBT power tube is connected to the driving signal output end of the control module, and a collector of the IGBT power tube is connected to the external load.
Therefore, the control module can control the on and off of the IGBT power tube, when the IGBT power tube is switched on, the external load works, and then the current detection circuit detects the current value of the external load during actual working, so that the control module can calculate accurate and real power consumption.
Preferably, the loop formed by the driving module and the external load includes a rectifier bridge, the positive electrode of the rectifier bridge is connected to the external load, and the signal input end of the current detection circuit is connected between the negative electrode of the rectifier bridge and the emitter of the IGBT power tube.
Therefore, the rectifier bridge can convert alternating current into direct current; when the IGBT power tube is conducted, the external load works, and then the current detection circuit detects the current value of the external load during actual working, so that the control module can calculate accurate and real power consumption.
Preferably, the voltage detection circuit comprises a rectification circuit, a voltage division circuit and a filter circuit; the mains voltage is input to the input end of the control module after rectification, voltage division and filtering.
Therefore, the accurate and real electricity consumption can be calculated through the voltage value detected by the voltage detection circuit.
Preferably, the device further comprises an operation module, and a signal output end of the operation module is connected with an input end of the control module.
Therefore, the control module can realize corresponding control through the operation module.
Preferably, the power supply further comprises a display module, wherein the input end of the display module is connected with the output end of the control module and used for displaying the power consumption of the external load.
Therefore, the power consumption can be displayed through the display module.
According to another aspect of the present invention, there is also provided a cooking appliance including the circuit of any one of the above embodiments.
Preferably, the cooking appliance is an induction cooker, an electromagnetic rice cooker, an electromagnetic pressure cooker or an induction cooker.
The cooking utensil comprises the power consumption detection circuit, and the sampling voltage value and the sampling current value can be directly detected through the voltage detection circuit and the current detection circuit to calculate the power consumption, so that a user can clearly know the real power consumption of an external load.
According to another aspect of the present invention, a control method of the detection circuit is also disclosed, which includes:
performing accumulated timing on the actual working time of the external load;
acquiring a sampling voltage value detected by a voltage detection circuit;
acquiring a sampling current value of the external load during working, which is detected by a current detection circuit;
and calculating the electricity consumption according to the sampling current value, the sampling voltage value and the actual working time of the external load.
Preferably, after receiving the command of the operation module for displaying the power consumption, the display module is controlled to display the power consumption.
According to the control method provided by the utility model, the electricity consumption can be calculated according to the directly detected voltage value and current value of the external load during actual working and the actual accumulated working time of the external load, so that a user can clearly know the actual electricity consumption of the external load.
Drawings
The following drawings of the utility model are included to provide a further understanding of the utility model. The drawings illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the utility model.
In the drawings:
fig. 1 is a schematic diagram of a power consumption amount detecting circuit according to a preferred embodiment of the present invention; and
fig. 2 is a schematic diagram of a power consumption amount detecting circuit according to another preferred embodiment, which is particularly suitable for a cooking appliance heated by an electric heating wire.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the utility model may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the utility model.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
Hereinafter, a power consumption amount detection circuit for a cooking appliance according to a preferred embodiment of the present invention will be described in detail. It is understood that the cooking appliance according to the present invention may be an induction cooker, an electric cooker, an electromagnetic pressure cooker or an induction cooker. The cooking utensil of the present invention may have various functions such as cooking rice, cooking porridge, etc.
As shown in fig. 1, the power consumption amount detection circuit of the present embodiment mainly includes: a voltage detection circuit, a current detection circuit, a drive module and a control module U1.
The signal output ends of the voltage detection circuit and the current detection circuit are respectively and correspondingly connected with two input ends of a control module U1, the output end of the control module U1 is connected with the input end of a driving module, and the signal input end of the current detection circuit is connected into a loop formed by the driving module and an external load of the cooking appliance.
The control module U1 is configured to: and enabling the external load to work by controlling the driving module so as to obtain a sampling current value when the external load works, and calculating the power consumption of the external load according to the sampling current value and the sampling voltage value.
The voltage detection circuit may include a rectification circuit, a voltage division circuit, and a filter circuit.
As shown in fig. 1, the rectifying circuit may include a diode D1 and a diode D2, one end (positive electrode) of the diode D1 is used for connecting a neutral line access end of a main board of the cooking appliance, and the other end of the diode D1 is connected with a voltage dividing circuit; one end (positive electrode) of the diode D2 is connected to the live wire connection terminal of the main board of the cooking appliance, and the other end of the diode D2 is connected to the voltage divider circuit. Thereby rectifying the mains voltage signal. The diode D1 and the diode D2 have a withstand voltage of 1000V and a current of 1A or more.
The voltage division circuit can comprise M1 resistors connected in series, wherein one end of the M1 resistors connected in series is connected with the output end of the rectifying circuit, and the other end of the M1 resistors connected in series is grounded. Illustratively, M1 ═ 2, as shown in fig. 1, the voltage dividing circuit includes a first voltage dividing resistor R1 and a second voltage dividing resistor R2. One end of the first voltage-dividing resistor R1 is connected with the cathodes of the diode D1 and the diode D2, the other end is connected with the second voltage-dividing resistor R2, and the other end of the second voltage-dividing resistor is grounded. M1 may have other values, that is, the number of resistors included in the voltage dividing circuit is not limited in the present invention, and the value may be set according to the needs of the scene.
With continued reference to fig. 1, the filter circuit may include a first filter capacitor C1 and a current limiting resistor R3. The first filter capacitor C1 is connected in parallel with a ground terminal resistor in the voltage division circuit; one end of the current limiting resistor R3 is connected to the other end of the ground resistor, and the other end of the current limiting resistor R3 is connected to the analog-to-digital conversion AD detection port (pin 9) of the control module U1. The ground terminal resistor in the voltage divider circuit is understood to be the second voltage divider resistor R2 in this embodiment. The current limiting resistor R3 is used to transmit the mains voltage signal to the analog-to-digital conversion AD detection port of the control module U1, and to protect the analog-to-digital conversion AD detection port, thereby obtaining a stable voltage value signal.
Wherein, the resistance values of the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 can be set to be greater than 100K ohms, and the resistance value of the current-limiting resistor R3 can be set to be greater than 1K ohms; the first capacitor C1 can be an electrolytic capacitor with a withstand voltage of 10V or more.
With continued reference to fig. 1, the current detection circuit may specifically include a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6 connected in series in this order; the second capacitor C2 is connected in parallel with the sixth resistor R6 and is connected to two pins (2 nd pin (CURR) and 6 th pin (P1)) of the control module U1, and the detected current value is read through the 2 nd pin. The resistance values of the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 can be selected to be greater than 200 ohms, and the resistance value of the seventh resistor R7 can be selected to be less than 1 ohm; the second capacitor C2 can be selected to be a ceramic chip capacitor with a withstand voltage of 10V.
The driving module may include an IGBT power tube. The emitting electrode of the IGBT power tube is grounded, the gate electrode of the IGBT power tube is connected with the driving signal output end of the control module U1, and the collector electrode of the IGBT power tube is connected with an external load. In the embodiment, an external load, such as a coil, is connected to the OUT1 and the OUT2, and a third capacitor C3 is arranged between the OUT1 and the OUT2, so that the coil and the electric three capacitor C3 form LC resonance to heat the inner pot. The third capacitor C3 can be a high-voltage capacitor with a withstand voltage of 1000V or more and 1uF or less.
With reference to fig. 1 again, the loop formed by the driving module and the external load may further include a rectifier bridge DB, an anode of the rectifier bridge DB is connected to the external load, and a signal input end of the current detection circuit is connected between a cathode of the rectifier bridge and an emitter of the IGBT power tube. Therefore, the control module U1 can control the on and off of the IGBT power tube, when the IGBT power tube is switched on, the external load works, the current value detected by the current detection circuit when the external load actually works is detected, and the control module U1 can calculate accurate and real electricity consumption.
The rectifier bridge DB is configured to convert ac power input through the zero line input terminal N and the live line input terminal L into dc power, where the ac power may be 220V commercial power.
Of course, the detection circuit of the present invention may further include an operation module, and a signal output terminal of the operation module is connected to an input terminal of the control module U1. The operation module can be a key, and the key can be a single key or a combined key. Furthermore, the detection circuit of the present invention may further include a display module, wherein an input end of the display module is connected to an output end of the control module U1, and is configured to display a power consumption of the external load. The display module can be a liquid crystal display screen, a digital tube and the like.
Another aspect of the present invention provides a cooking appliance including the power consumption detecting circuit according to any one of the above embodiments.
The cooking utensil mainly comprises a pot body and a cover body. The cooker body is basically in the shape of a round-corner cuboid and is provided with an inner pot containing part in a cylindrical shape, and the inner pot can be freely placed into or taken out of the inner pot containing part so as to be convenient for cleaning the inner pot. The upper surface of the inner pot has a circular opening for containing materials to be heated, such as rice, soup, etc., into the inner pot. The lid body is substantially in the shape of a rounded rectangular parallelepiped and substantially corresponds to the shape of the pot body. The cover body is pivotally connected to the pot body in an openable and closable manner and is used for covering the pot body. When the cover body is covered on the cooker body, a cooking space is formed between the cover body and the inner pot.
For brevity, the structure of the power consumption detecting circuit is not described in detail.
In summary, as shown in fig. 1, the power consumption detecting circuit of the present embodiment is particularly suitable for an electromagnetic cooking appliance, in which the external loads connected to the OUT1 and the OUT2 are coils, and a third capacitor C3 is disposed between the OUT1 and the OUT2, so that the coils and the electric capacitor C3 form LC resonance to heat the inner pot.
However, in other embodiments, the connections at OUT1 and OUT2 may be resistive loads, such as heating wires, the resistances of which may need to be reasonably pre-selected since the cooking appliance may need to operate at different operating voltages, i.e., the resistances of the two heating wires connected to the positions of OUT1 and OUT2, are known after the cooking appliance is shipped. Therefore, for a cooking appliance that heats by using a general heating wire (electric heating tube), the power consumption amount can be acquired by using the power consumption amount detection circuit shown in fig. 2.
The power usage detection circuit provided in fig. 2 may also include a voltage detection circuit, a driving module, and a control module. The electricity consumption amount detecting circuit of fig. 2 is similar in structure to the electricity consumption amount detecting circuit of the present invention described above (refer to fig. 1), and differs from fig. 1 in that: it does not have a current sensing circuit and the drive module is a relay switch J1.
The utility model also discloses a control method of the power consumption detection circuit, which specifically comprises the following steps:
performing accumulated timing on the actual working time of the external load;
acquiring a sampling voltage value detected by a voltage detection circuit;
acquiring a sampling current value of an external load detected by a current detection circuit during working;
and calculating the electricity consumption Q according to the sampling current value I1, the sampling voltage value V1 and the actual working time of the external load.
The specific calculation formula may be Q ═ U ═ I ═ T; and U is the detected actual working voltage of the external load, I is the detected actual working current I of the external load, and T is the actual accumulated timing duration of the external load. Of course, the power consumption Q can also be understood as the integral of the product of current and voltage over the actual cumulative time period of the external load.
It can be understood that, for a common cooking appliance that heats by using a resistive load (heating wire), since the resistance value of the heating wire is known from factory, the power consumption can be calculated by using the formula Q ^ U2/R ^ T. And U is the detected actual working voltage of the resistive load, R is the resistance value of the resistive load, and T is the actual accumulated timing duration of the resistive load.
According to the power consumption detection circuit, the cooking utensil and the control method, the sampling voltage value and the sampling current value can be directly detected through the voltage detection circuit and the current detection circuit to calculate the power consumption, so that a user can clearly know the real power consumption of an external load.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications fall within the scope of the present invention as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (8)
1. A power consumption detecting circuit for a cooking appliance, comprising: a voltage detection circuit, a current detection circuit, a driving module and a control module,
the signal output ends of the voltage detection circuit and the current detection circuit are respectively and correspondingly connected with two input ends of the control module, the output end of the control module is connected with the input end of the driving module, and the signal input end of the current detection circuit is connected into a loop formed by the driving module and an external load of the cooking appliance;
the control module is configured to: and controlling the driving module to enable the external load to work so as to obtain a sampling current value when the external load works, and calculating the power consumption of the external load according to the sampling current value and the sampling voltage value.
2. The power consumption detecting circuit according to claim 1, wherein the driving module comprises an IGBT power tube, an emitter of the IGBT power tube is grounded, a gate of the IGBT power tube is connected to the driving signal output terminal of the control module, and a collector of the IGBT power tube is connected to the external load.
3. The power consumption detection circuit according to claim 2, wherein the loop formed by the driving module and the external load comprises a rectifier bridge, an anode of the rectifier bridge is connected to the external load, and a signal input end of the current detection circuit is connected between a cathode of the rectifier bridge and an emitter of the IGBT power tube.
4. The electricity consumption detecting circuit according to claim 1, wherein the voltage detecting circuit comprises a rectifying circuit, a voltage dividing circuit, and a filtering circuit; the mains voltage is input to the input end of the control module after rectification, voltage division and filtering.
5. The power consumption detecting circuit according to claim 1, further comprising an operation module, wherein a signal output end of the operation module is connected to an input end of the control module.
6. The power consumption detection circuit according to claim 1, further comprising a display module, wherein an input end of the display module is connected to an output end of the control module, and is configured to display the power consumption of the external load.
7. A cooking appliance characterized by comprising the power consumption amount detection circuit according to any one of claims 1 to 6.
8. The cooking appliance of claim 7, wherein the cooking appliance is an induction cooker, an electric cooker, an electromagnetic pressure cooker, or an induction cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022795635.9U CN215866872U (en) | 2020-11-27 | 2020-11-27 | Power consumption detection circuit and have its cooking utensil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022795635.9U CN215866872U (en) | 2020-11-27 | 2020-11-27 | Power consumption detection circuit and have its cooking utensil |
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| Publication Number | Publication Date |
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| CN215866872U true CN215866872U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022795635.9U Active CN215866872U (en) | 2020-11-27 | 2020-11-27 | Power consumption detection circuit and have its cooking utensil |
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| CN (1) | CN215866872U (en) |
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