Voltage memory circuit and electric cooker

Abstract

The utility model relates to the technical field of memory circuits, and discloses a voltage memory circuit and an electric cooker, and the circuit comprises a voltage following circuit, a following diode, an electricity storage capacitor, a sampling circuit and a storage chip. The voltage follower circuit receives an input voltage input by an external power supply port; the electricity storage capacitor is charged through the following diode, and the electricity storage capacitor stores input voltage; the input end of the sampling circuit is connected with one end of the power storage capacitor, and the sampling circuit collects the maximum value of the voltage on the power storage capacitor; the storage chip is connected with one end of the power storage capacitor, and the storage chip records the current working state. The electric rice cooker has the advantages that the maximum voltage is memorized, the power storage capacitor is used for supplying power to the storage chip for a short time, the storage chip can record the current working state during power failure, the electric rice cooker can continue to run according to the working state before power failure during power-on again, the situation that the working process is lost while voltage signals are missed is prevented, and the service life of the electric rice cooker is prolonged. And the operation stability of the electric cooker is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of memory circuit protection, in particular to a voltage memory circuit and an electric rice cooker. Background Art

[0002] During the operation of existing electronic rice cooker products, the product can quickly determine the existence of abnormal power failure by collecting the operating voltage signal, and then issue a reminder to power on again.

[0003] However, in the prior art, the target voltage is usually sampled using an ADC timing sampling method. This method is prone to losing detailed information or missing signal transition information when facing a variable signal. In addition, after powering on again, the product will lose its workflow and will have to start working again, which will extend the product's work cycle and affect the product's work performance. Utility Model Content

[0004] The purpose of the utility model is to provide a voltage memory circuit and an electric rice cooker to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The utility model solves the technical problem by providing a voltage memory circuit and an electric rice cooker. In an embodiment of the first aspect of the utility model, a voltage memory circuit includes:

[0006] A voltage follower circuit, wherein an input end of the voltage follower circuit is connected to an external power supply port, and the voltage follower circuit is used to receive an input voltage input from the external power supply port;

[0007] A follower diode, wherein an anode of the follower diode is connected to an output end of the voltage follower circuit;

[0008] A storage capacitor, one end of which is connected to the cathode of the follower diode, and the other end of which is connected to the ground;

[0009] A sampling circuit, wherein an input end of the sampling circuit is connected to one end of a storage capacitor, and the sampling circuit is used to collect the maximum value of the voltage on the storage capacitor;

[0010] A storage chip is connected to one end of the storage capacitor, and the storage chip is used to record the current working status.

[0011] Furthermore, a voltage memory circuit also includes: a control module; the control module is connected to the output end of the sampling circuit, and the control module is connected to the storage chip.

[0012] Further, a voltage memory circuit also includes: a reset circuit;

[0013] The input end of the reset circuit is connected to the output end of the control module, and the output end of the reset circuit is respectively connected to the cathode of the follower diode and one end of the storage capacitor.

[0014] Furthermore, a voltage memory circuit also includes: a voltage stabilizing and regulating circuit;

[0015] The input end of the voltage stabilizing and regulating circuit is connected to one end of the storage capacitor, and the output end of the voltage stabilizing and regulating circuit is connected to the storage chip.

[0016] Furthermore, the voltage follower circuit comprises:

[0017] A first resistor, one end of which is connected to the external power supply port;

[0018] an operational amplifier, wherein an input terminal of the operational amplifier is connected to the other end of the first resistor, and an output terminal of the operational amplifier is connected to the anode of the follower diode;

[0019] A second resistor, one end of the second resistor is connected to the input end of the operational amplifier, and the other end of the second resistor is connected to the output end of the operational amplifier.

[0020] Further, the reset circuit comprises:

[0021] a third resistor, one end of which is connected to the output end of the control module;

[0022] a fourth resistor, one end of which is connected to the cathode of the follower diode and one end of the storage capacitor respectively;

[0023] a fifth resistor, one end of the fifth resistor being connected to the other end of the third resistor, and the other end of the fifth resistor being connected to the ground;

[0024] A transistor, wherein the base of the transistor is connected to the other end of the third resistor, the collector of the transistor is connected to the other end of the fourth resistor, and the emitter of the transistor is connected to the ground terminal.

[0025] Furthermore, the voltage stabilizing and regulating circuit comprises:

[0026] A voltage stabilizing diode, wherein an anode of the voltage stabilizing diode is connected to the storage chip;

[0027] a sixth resistor, one end of which is connected to the storage chip, and the other end of which is respectively connected to the cathode of the voltage stabilizing diode and the storage capacitor;

[0028] An adjustable resistor, one end of which is connected to the cathode of the storage capacitor and the voltage-stabilizing diode respectively, and the other end of which is connected to the ground.

[0029] Furthermore, the transistor is an NPN transistor.

[0030] Furthermore, the sampling circuit includes: an ADC sampling chip.

[0031] In some embodiments of the second aspect of the present utility model, an electric rice cooker includes a voltage memory circuit as in some embodiments of the first aspect of the present utility model.

[0032] The beneficial effect of the utility model is that through the connection between the follower diode, the voltage follower circuit and the storage capacitor, the sampling circuit can record the maximum voltage value of the input voltage from the beginning to the current moment in real time, so that the maximum voltage is stored and memorized, and the storage capacitor is used to power the storage chip for a short time, so that the storage chip can record the current working state when the power is off, so that when the power is on again, the product can continue to operate according to the working state before the power is off, preventing the loss of the voltage signal and the loss of the work process, thereby improving the stability of the product operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a partial circuit diagram of a voltage memory circuit provided by an embodiment of the utility model;

[0034] Figure 2 It is a partial circuit diagram of a voltage memory circuit provided by another embodiment of the utility model;

[0035] Figure 3 It is a schematic diagram of a framework of a voltage memory circuit provided by an embodiment of the utility model.

[0036] Attached figure numbers: 100, voltage follower circuit, R1, first resistor, R2, second resistor, U1, operational amplifier, D1, follower diode, C1, storage capacitor, 200, sampling circuit, 300, storage chip, 400, reset circuit, R3, third resistor, R4, fourth resistor, R5, fifth resistor, Q1, transistor, 500, voltage stabilizing and regulating circuit, D2, voltage stabilizing diode, R6, sixth resistor, RT1, adjustable resistor, 600, control module. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and cannot be understood as limiting the present utility model.

[0038] It should be noted that although the functional module division is performed in the schematic diagram, in some cases, the module division can be different from that in the system.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0041] During the operation of existing electronic rice cooker products, the product can quickly determine the existence of abnormal power outage by collecting the operating voltage signal, and then issue a reminder to restore power.

[0042] However, in the prior art, the target voltage is usually sampled using an ADC timing sampling method. This method is prone to losing detailed information or missing signal transition information when facing variable signals, such as being unable to collect the peak-to-peak value during power failure or the peak-to-peak value of the voltage received by the rice cooker when it trips. In addition, the rice cooker will lose its workflow after being powered on again and will have to reselect to start working, thereby lengthening the product's working cycle and affecting the product's working effect.

[0043] Reference Figures 1 to 3 In some embodiments of the first aspect of the present invention, a voltage memory circuit includes: a voltage follower circuit 100 , a follower diode D1 , a storage capacitor C1 , a sampling circuit 200 and a memory chip 300 .

[0044] The external power supply port is electrically connected to the input end of the voltage follower circuit 100, the output end of the voltage follower circuit 100 is electrically connected to the anode of the follower diode D1, the cathode of the follower diode D1 is electrically connected to one end of the storage capacitor C1, and the other end of the storage capacitor C1 is grounded.

[0045] The external power supply port sends the input voltage to the voltage follower circuit 100. When the input voltage changes, the output voltage of the voltage follower circuit 100 also changes with the input voltage. The voltage follower circuit 100 charges the storage capacitor C1 through the follower diode D1. The voltage follower circuit 100 can be electrically connected to the port of the circuit to be detected to achieve the maximum voltage detection of other devices.

[0046] In one embodiment, when the input voltage gradually increases, since the voltage at the anode terminal of the follower diode D1 is greater than the voltage at the cathode terminal, the voltage follower circuit 100 charges the storage capacitor C1. When the input voltage increases to a maximum value and begins to decrease, the current voltage stored in the storage capacitor C1 is the maximum value of the input voltage, and the voltage at the anode terminal of the follower diode D1 is less than the voltage at the cathode terminal, and the follower diode D1 is not turned on, maintaining the voltage stored in the storage capacitor C1.

[0047] The input end of the sampling circuit 200 is electrically connected to one end of the storage capacitor C1 , and the sampling circuit 200 collects the voltage signal on the storage capacitor C1 , thereby obtaining the maximum voltage value on the storage capacitor C1 , that is, obtaining the maximum value of the input voltage.

[0048] The sampling circuit 200 includes: an ADC sampling chip.

[0049] The storage chip 300 is electrically connected to one end of the storage capacitor C1. The storage chip 300 is used to save the current working state. When the product loses power, the storage capacitor C1 can supply power to the storage chip 300 to record the current working state, that is, the working state before the power failure.

[0050] In the scheme of the above embodiment, by connecting the follower diode D1, the voltage follower circuit 100 and the storage capacitor C1, the sampling circuit 200 can record the maximum voltage value of the input voltage from the beginning to the current moment in real time, so that the maximum voltage is stored and memorized, and the storage capacitor C1 is used to power the storage chip 300 for a short time, so that the storage chip 300 can record the current working state when the power is off, so that when the power is on again, the product can continue to operate according to the working state before the power is off, thereby preventing the voltage signal from being missed and the work process from being lost, thereby improving the stability of the product operation.

[0051] Reference Figures 1 to 3 In some embodiments of the first aspect of the present utility model, the voltage memory circuit further includes: a control module 600 , a reset circuit 400 and a voltage regulation circuit 500 .

[0052] The output end of the reset circuit 400 is electrically connected to the cathode of the follower diode D1 , and the output end of the reset circuit 400 is electrically connected to one end of the storage capacitor C1 . The input end of the reset circuit 400 is electrically connected to the control module 600 .

[0053] The reset circuit 400 is used to receive the initialization signal output by the control module 600 and release the voltage of the storage capacitor C1 to reset the voltage memory circuit, wherein the initialization signal is a high level signal.

[0054] The input end of the voltage regulating circuit 500 is electrically connected to one end of the storage capacitor C1, and the output end of the voltage regulating circuit 500 is electrically connected to the storage chip 300. The voltage regulating circuit 500 is used to stabilize the stored input voltage and adjust the discharge speed of the storage capacitor C1.

[0055] The control module 600 is electrically connected to the output end of the sampling circuit 200, and the control module 600 is electrically connected to the storage chip 300. The storage chip 300 can obtain the current working state from the control module 600 for recording. That is, the control chip is electrically connected to the storage chip 300,

[0056] In one embodiment, when the product loses power, the storage capacitor C1 can supply power to the storage chip 300, and the storage chip 300 determines and records the current working state of the product through the control chip in the control module 600, that is, records the working state before the power failure. When the product is powered on, the control module 600 can determine the working state before the power failure through the current working state recorded by the storage chip 300. The control module 600 can also determine the stored voltage of the storage capacitor C1 after a short period of power supply through the sampling circuit 200, thereby determining the power failure time. According to the power failure time and the current working state, the working data running before the power failure can be determined.

[0057] Through the scheme in the above-mentioned embodiment, the utility model can regulate the voltage stored in the energy storage capacitor C1 through the control module 600, the reset circuit 400 and the voltage stabilizing and regulating circuit 500. Compared with the prior art that uses multiple energy storage capacitors to achieve different functions, the utility model uses a single energy storage capacitor C1 to realize the sampling circuit 200 to determine the maximum value of the input voltage, and also to supply power to the storage chip 300 to record the current working status.

[0058] Reference Figures 1 to 3 In some embodiments of the first aspect of the present utility model, the voltage follower circuit 100 includes: a first resistor R1, a second resistor R2 and an operational amplifier U1.

[0059] The external power supply terminal is electrically connected to one end of the first resistor R1 , and the other end of the first resistor R1 is electrically connected to the input end of the operational amplifier U1 .

[0060] One end of the second resistor R2 is electrically connected to the input end of the operational amplifier U1, and the other end of the second resistor R2 is electrically connected to the output end of the operational amplifier U1 and the anode of the follower diode D1.

[0061] Reference Figures 1 to 3 In some embodiments of the first aspect of the present invention, the reset circuit 400 includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a transistor Q1.

[0062] One end of the third resistor R3 is electrically connected to the output end of the control module 600, the other end of the third resistor R3 is electrically connected to the base of the transistor Q1, one end of the fourth resistor R4 is electrically connected to the cathode of the follower diode D1, one end of the fourth resistor R4 is also electrically connected to one end of the storage capacitor C1, and the other end of the fourth resistor R4 is electrically connected to the collector of the transistor Q1.

[0063] One end of the fifth resistor R5 is electrically connected to the base of the transistor Q1 , and one end of the fifth resistor R5 is also electrically connected to the other end of the third resistor R3 . The emitter of the transistor Q1 is grounded, wherein the transistor Q1 is an NPN transistor.

[0064] In this embodiment, the control module 600 outputs an initialization signal to the transistor Q1 , and the transistor Q1 is turned on to release the voltage of the storage capacitor C1 to reset the voltage memory circuit, wherein the initialization signal is a high level signal.

[0065] Reference Figures 1 to 3 In some embodiments of the first aspect of the present utility model, the voltage regulating circuit 500 includes: a voltage stabilizing diode D2, a sixth resistor R6 and an adjustable resistor RT1.

[0066] The anode of the Zener diode D2 is electrically connected to the memory chip 300 , the cathode of the Zener diode D2 is electrically connected to one end of the adjustable resistor RT1 , and the cathode of the Zener diode D2 is also electrically connected to the other end of the sixth resistor R6 .

[0067] One end of the sixth resistor R6 is electrically connected to the memory chip 300 , and the other end of the sixth resistor R6 is electrically connected to one end of the storage capacitor C1 .

[0068] One end of the adjustable resistor RT1 is electrically connected to the cathode of the voltage-stabilizing diode D2, one end of the adjustable resistor RT1 is also electrically connected to the other end of the sixth resistor R6, and the other end of the adjustable resistor RT1 is electrically connected to the other end of the storage capacitor C1, that is, the other end of the adjustable resistor RT1 is grounded.

[0069] After the product loses power, the storage capacitor C1 can be discharged through the adjustable resistor RT1. By adjusting the resistance of the adjustable resistor RT1, the discharge speed of the storage capacitor C1 is controlled, thereby controlling the memory time of the storage chip 300.

[0070] In the scheme of the above embodiment, by connecting the follower diode D1, the voltage follower circuit 100 and the storage capacitor C1, the sampling circuit 200 can record the maximum voltage value of the input voltage from the beginning to the current moment in real time, so that the maximum voltage is stored and memorized, and the storage capacitor C1 is used to power the storage chip 300 for a short time, so that the storage chip 300 can record the current working state when the power is off, so that when the power is on again, the product can continue to operate according to the working state before the power is off, thereby preventing the voltage signal from being missed and the work process from being lost, thereby improving the stability of the product operation.

[0071] In some embodiments of the second aspect of the utility model, an electric rice cooker comprises a voltage memory circuit of some embodiments of the first aspect of the utility model.

[0072] The preferred implementation methods of the utility model are specifically described above, but the invention of the utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the utility model. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A voltage memory circuit, characterized in that: include: A voltage follower circuit, wherein an input end of the voltage follower circuit is connected to an external power supply port, and the voltage follower circuit is used to receive an input voltage input from the external power supply port; A follower diode, wherein an anode of the follower diode is connected to an output end of the voltage follower circuit; A storage capacitor, one end of which is connected to the cathode of the follower diode, and the other end of which is connected to the ground; A sampling circuit, wherein an input end of the sampling circuit is connected to one end of a storage capacitor, and the sampling circuit is used to collect the maximum value of the voltage on the storage capacitor; A storage chip is connected to one end of the storage capacitor, and the storage chip is used to record the current working status.

2. A voltage memory circuit according to claim 1, characterized in that: Also includes: Control module; the control module is connected to the output end of the sampling circuit, and the control module is connected to the storage chip.

3. A voltage memory circuit according to claim 2, characterized in that: Also includes: Reset circuit; The input end of the reset circuit is connected to the output end of the control module, and the output end of the reset circuit is respectively connected to the cathode of the follower diode and one end of the storage capacitor.

4. A voltage memory circuit according to claim 1, characterized in that: Also includes: Voltage regulating circuit; The input end of the voltage stabilizing and regulating circuit is connected to one end of the storage capacitor, and the output end of the voltage stabilizing and regulating circuit is connected to the storage chip.

5. The voltage memory circuit according to claim 1, characterized in that: The voltage follower circuit comprises: A first resistor, one end of which is connected to the external power supply port; an operational amplifier, wherein an input terminal of the operational amplifier is connected to the other end of the first resistor, and an output terminal of the operational amplifier is connected to the anode of the follower diode; A second resistor, one end of the second resistor is connected to the input end of the operational amplifier, and the other end of the second resistor is connected to the output end of the operational amplifier.

6. A voltage memory circuit according to claim 3, characterized in that: The reset circuit comprises: a third resistor, one end of which is connected to the output end of the control module; a fourth resistor, one end of which is connected to the cathode of the follower diode and one end of the storage capacitor respectively; a fifth resistor, one end of the fifth resistor being connected to the other end of the third resistor, and the other end of the fifth resistor being connected to the ground; A transistor, wherein the base of the transistor is connected to the other end of the third resistor, the collector of the transistor is connected to the other end of the fourth resistor, and the emitter of the transistor is connected to the ground terminal.

7. A voltage memory circuit according to claim 4, characterized in that: The voltage stabilizing and regulating circuit comprises: A voltage stabilizing diode, wherein an anode of the voltage stabilizing diode is connected to the storage chip; a sixth resistor, one end of which is connected to the storage chip, and the other end of which is respectively connected to the cathode of the voltage stabilizing diode and the storage capacitor; An adjustable resistor, one end of which is connected to the cathode of the storage capacitor and the voltage-stabilizing diode respectively, and the other end of which is connected to the ground.

8. The voltage memory circuit according to claim 6, characterized in that: The transistor is an NPN transistor.

9. The voltage memory circuit according to claim 1, characterized in that: The sampling circuit includes: an ADC sampling chip.

10. An electric rice cooker, characterized in that: The invention comprises a voltage memory circuit as claimed in any one of claims 1 to 9.

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