Heating control circuit and intelligent toaster

Abstract

An embodiment of the present invention provides a heating control circuit and an intelligent toaster. The heating control circuit includes: a heating switch module, a first control module, a second control module, a power switch module, and a heating module; the heating switch module is configured to issue a first instruction; the first control module and the second control module are configured to receive the first instruction to drive the power switch module to close, causing the heating module to start heating; the heating switch module is configured to issue a second instruction; the first control module or the second control module is configured to receive the second instruction to drive the power switch module to open, causing the heating module to stop heating.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of electronic technology, and in particular to a heating control circuit and an intelligent toaster. Background Art

[0002] With the continuous development of home appliances, more and more appliances are entering people's homes, especially toasters. Currently, most toasters use a lever to power on. This lever control can simultaneously close and disconnect the neutral and live wires of the AC power supply while meeting the electrical clearance requirements required by safety regulations. However, the lever's mechanical structure is inconvenient to operate, and when the lever rebounds after toasting, the machine is prone to shaking.

[0003] To this end, toasters are increasingly adopting automatic lift mechanisms. These mechanisms require no user intervention and automatically rise when toasting is finished, preventing the machine from shaking. However, with the updating of safety standards, the requirements for devices with visible glow-wires are becoming increasingly stringent, necessitating the need for safer and more reliable heating control methods for glow-wire devices. Summary of the Invention

[0004] To address the technical problem that as safety standards are updated, the requirements for devices with visible glow-wires are becoming increasingly stringent, thus requiring a safer and more reliable heating control method for glow-wire devices, embodiments of the present invention provide a heating control circuit and an intelligent toaster.

[0005] In a first aspect of an embodiment of the present invention, a heating control circuit is first provided, the heating control circuit comprising: a heating switch module, a first control module, a second control module, a power switch module and a heating module;

[0006] The heating switch module is used to issue a first instruction;

[0007] The first control module and the second control module are both used to receive the first instruction to drive the power switch module to close and the heating module to start heating;

[0008] The heating switch module is used to issue a second instruction;

[0009] The first control module or the second control module is used to receive the second instruction to drive the power switch module to be disconnected and the heating module to stop heating.

[0010] In an optional embodiment, the first end of the heating switch module is connected to the first end of the first control module, and the second end of the heating switch module is connected to the first end of the second control module; the second end of the first control module is connected to the first end of the power switch module, and the second end of the second control module is connected to the second end of the power switch module;

[0011] The third end of the power switch module is connected to the neutral line of the AC power supply, and the fourth end of the power switch module is connected to the live line of the AC power supply; the fifth end of the power switch module is connected to the first end of the heating module, and the sixth end of the power switch module is connected to the second end of the heating module.

[0012] In an optional embodiment, the power switch module includes a first relay, a first transistor, a second transistor, and a third transistor, and the first relay includes a first coil, a first switch, and a second switch;

[0013] A first end of the first switch is connected to the neutral line of the AC power supply, and a second end of the first switch is connected to the first end of the heating module; a first end of the second switch is connected to the live line of the AC power supply, and a second end of the second switch is connected to the second end of the heating module;

[0014] The second end of the first control module is connected to the first end of the first transistor, the second end of the first transistor is grounded, the third end of the first transistor is connected to the first end of the first coil, and the second end of the first coil is connected to the first end of the second transistor;

[0015] The second end of the second control module is connected to the first end of the third triode, the second end of the third triode is grounded, the third end of the third triode is connected to the second end of the second triode, and the third end of the second triode is connected to the first DC power supply;

[0016] The first control module and the second control module both receive the first instruction, the second terminal of the first control module and the second terminal of the second control module are both set to high, the first coil is energized, the first switch and the second switch are closed, and the heating module starts heating;

[0017] When the first control module or the second control module receives the second instruction, the second end of the first control module or the second end of the second control module is set to low, the first coil is not energized, the first switch and the second switch are disconnected, and the heating module stops heating.

[0018] In an optional embodiment, the power switch module further includes a first diode, a first end of the first diode is connected to the third end of the first transistor, and a second end of the first diode is connected to the first end of the second transistor.

[0019] In an optional embodiment, the power switch module also includes a first resistor and a second resistor, the second end of the first control module is connected to the first end of the first resistor, the second end of the first resistor is connected to the first end of the second resistor and the first end of the first transistor, and the second end of the second resistor is grounded.

[0020] In an optional embodiment, the power switch module also includes a third resistor and a fourth resistor, the second end of the second control module is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the fourth resistor and the first end of the third transistor, and the second end of the fourth resistor is grounded.

[0021] In an optional embodiment, the power switch module also includes a fifth resistor and a sixth resistor, the third end of the third transistor is connected to the first end of the fifth resistor, the second end of the fifth resistor is connected to the first end of the sixth resistor and the second end of the second transistor, and the second end of the sixth resistor is connected to the first DC power supply.

[0022] In an optional embodiment, the heating control circuit also includes a heating protection module, the third end of the first control module or the second control module is connected to the first end of the heating protection module, the second end of the heating protection module is connected to the sixth end of the power switch module, and the third end of the heating protection module is connected to the second end of the heating module.

[0023] In an optional embodiment, the heating protection module includes a second relay and a fourth transistor, and the second relay includes a second coil and a third switch;

[0024] The third end of the first control module or the second control module is connected to the first end of the fourth transistor, the second end of the fourth transistor is grounded, the third end of the fourth transistor is connected to the first end of the second coil, and the second end of the second coil is connected to the second DC power supply;

[0025] The second end of the second switch is connected to the first end of the third switch, and the second end of the third switch is connected to the second end of the heating module.

[0026] In an optional embodiment, the heating control circuit further includes a second diode, a first end of the second diode is connected to the third end of the fourth transistor, and a second end of the second diode is connected to the second DC power supply.

[0027] In an optional embodiment, the heating control circuit also includes a seventh resistor and an eighth resistor, the third end of the first control module or the second control module is connected to the first end of the seventh resistor, the second end of the seventh resistor is connected to the second end of the eighth resistor and the first end of the fourth transistor, and the second end of the eighth resistor is grounded.

[0028] In an optional embodiment, the heating control circuit includes at least one power switch module, and the first relays in the power switch module are connected in series.

[0029] In an optional embodiment, the heating control circuit includes at least one power switch module, at least one heating protection module, and at least one heating module;

[0030] The number of the power switch modules is in a multiple relationship with the number of the heating protection modules and the number of the heating modules.

[0031] In a second aspect of the embodiments of the present invention, an intelligent toaster is provided, comprising the heating control circuit described in any one of the first aspects above.

[0032] The heating control circuit provided by the embodiment of the present invention includes a heating switch module, a first control module, a second control module, a power switch module and a heating module. The heating switch module is used to issue a first instruction, and the first control module and the second control module are both used to receive the first instruction to drive the power switch module to close, so that the heating module starts heating; the heating switch module is used to issue a second instruction, and the first control module or the second control module is used to receive the second instruction to drive the power switch module to disconnect, so that the heating module stops heating. By both the first control module and the second control module receiving the first instruction, the power switch module is driven to close, and the heating module starts heating, thereby avoiding one control module being abnormal and the power switch module being mistakenly turned on, causing the heating module to heat or be energized, causing harm to the user. Moreover, by receiving the second instruction, the power switch module is driven to disconnect, and the heating module stops heating, thereby avoiding one control module being abnormal and unable to turn off the power switch module. In this way, the heating control method of the heating module is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 Schematic diagram of a heating control circuit shown in an embodiment of the present invention;

[0036] Figure 2 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0037] Figure 3 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0038] Figure 4 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0039] Figure 5 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0040] Figure 6 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0041] Figure 7 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0042] Figure 8 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0043] Figure 9 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0044] Figure 10 Schematic diagram of another heating control circuit shown in an embodiment of the present invention;

[0045] Figure 11 This is a schematic diagram of a single-slot, single-controller structure shown in an embodiment of the present invention;

[0046] Figure 12 This is a structural diagram of relays connected in series shown in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] In order to make the heating control mode of the glow wire device safer and more reliable when the user uses the smart toaster, the embodiment of the present invention provides a heating control circuit 10. Figure 1 As shown, it may specifically include a heating switch module 11 , a first control module 12 , a second control module 13 , a power switch module 14 and a heating module 15 .

[0050] The heating switch module 11 is used to issue a first instruction; the first control module 12 and the second control module 13 are both used to receive the first instruction to drive the power switch module 14 to close and the heating module 15 to start heating;

[0051] The heating switch module 11 is used to issue a second instruction; the first control module 12 or the second control module 13 is used to receive the second instruction to drive the power switch module 14 to disconnect and the heating module 15 to stop heating.

[0052] A first end of the heating switch module 11 is connected to a first end of the first control module 12, and a second end of the heating switch module 11 is connected to a first end of the second control module 13. A second end of the first control module 12 is connected to a first end of the power switch module 14, and a second end of the second control module 13 is connected to a second end of the power switch module 14.

[0053] The third end of the power switch module 14 is connected to the neutral line N of the AC power supply, and the fourth end of the power switch module 14 is connected to the live line L of the AC power supply; the fifth end of the power switch module 14 is connected to the first end of the heating module 15, and the sixth end of the power switch module 14 is connected to the second end of the heating module 15.

[0054] The heating switch module 11 sends a first instruction, the first control module 12 and the second control module 13 both receive the first instruction, drive the power switch module 14 to close, and the heating module 15 starts heating; the heating switch module 11 sends a second instruction, the first control module 12 or the second control module 13 receives the second instruction, drives the power switch module 14 to disconnect, and the heating module 15 stops heating.

[0055] It should be noted that, for the heating switch module 11, it can specifically be a button or a touch screen; for the first control module 12 and the second control module 13, they can both be MCUs, and of course they can also be other types of processors; for the heating module 15, it can specifically be various types of heating wires, and the embodiments of the present invention do not limit this.

[0056] Taking the smart toaster as an example, the toasting function is turned on by pressing a button or touching the screen. At this time, the button or touching the screen will send an instruction to start toasting. Both MCU1 and MCU2 receive the instruction to start toasting, drive the power switch module 14 to close, and the heating wire starts to heat up. This prevents one MCU from being abnormal and accidentally turning on the power switch module 14, causing the heating wire to heat up or the heating wire to be electrified, causing harm to the user.

[0057] The toasting function is ended by pressing a button or the touch screen. At this time, the button or the touch screen will issue an instruction to end toasting. MCU1 or MCU2 receives the instruction to end toasting and drives the power switch module 14 to disconnect, and the heating wire stops heating. In this way, any MCU receives the instruction to end toasting and drives the power switch module 14 to disconnect, avoiding the situation where one MCU fails to turn off the heating wire after the toasting is finished.

[0058] Through the above description of the heating control circuit 10 provided in the embodiment of the present invention, the first control module 12 and the second control module 13 both receive the first instruction, drive the power switch module 14 to close, and the heating module 15 starts heating, so as to avoid one control module being abnormal and the power switch module 14 being mistakenly turned on, causing the heating module 15 to be heated or energized, causing harm to the user, and the first control module 12 or the second control module 13 receives the second instruction, drives the power switch module 14 to disconnect, and the heating module 15 stops heating, so as to avoid one control module being abnormal and the power switch module 14 being unable to be turned off, thereby making the heating control method of the heating module 15 safer and more reliable.

[0059] In addition, in the embodiment of the present invention, the power switch module 14 may specifically include a first relay Y1, a first transistor Q1, a second transistor Q2, and a third transistor Q3. The first relay Y1 includes a first coil L1, a first switch K1, and a second switch K2. Figure 2 shown.

[0060] A first end of the first switch K1 is connected to the neutral line N of the AC power supply, and a second end of the first switch K1 is connected to the first end of the heating module 15; a first end of the second switch K2 is connected to the live line L of the AC power supply, and a second end of the second switch K2 is connected to the second end of the heating module 15;

[0061] The second end of the first control module 12 is connected to the first end of the first transistor Q1, the second end of the first transistor Q1 is grounded, the third end of the first transistor Q1 is connected to the first end of the first coil L1, and the second end of the first coil L1 is connected to the first end of the second transistor Q2;

[0062] The second end of the second control module 13 is connected to the first end of the third transistor Q3, the second end of the third transistor Q3 is grounded, the third end of the third transistor Q3 is connected to the second end of the second transistor Q2, and the third end of the second transistor Q2 is connected to the first DC power supply.

[0063] In this way, the first control module 12 and the second control module 13 both receive the first instruction, the second end of the first control module 12 and the second end of the second control module 13 are both set to high, the first coil L1 is energized, the first switch K1 and the second switch K2 are closed, and the heating module 15 starts heating;

[0064] When the first control module 12 or the second control module 13 receives the second instruction, the second end of the first control module 12 or the second end of the second control module 13 is set to low, the first coil L1 is not energized, the first switch K1 and the second switch K2 are disconnected, and the heating module 15 stops heating.

[0065] Taking the smart toaster as an example, the first relay Y1 is a normally open relay with two sets of contacts. When the first coil L1 is not energized, both sets of contacts are disconnected. When the first coil L1 is energized, both sets of contacts are closed. The first relay Y1 is controlled by two MCUs: MCU1 and MCU2.

[0066] When MCU2_CTR1 is set high, transistors Q2 and Q3 are both conducting, and first coil L1 is pulled up to VCC_12V. If MCU1_CTR1 is set low, transistor Q1 is not conducting, and first relay Y1 is not conducting. If MCU1_CTR1 is set high, transistor Q1 is conducting, and first coil L1 is pulled down to GND. If MCU2_CTR1 is set low, transistors Q2 and Q3 are not conducting, and first relay Y1 is not conducting. Only when both MCU2_CTR1 and MCU1_CTR1 are set high, both sets of contacts of first relay Y1 are closed. The relationship between the output signals of MCU1_CTR1 and MCU2_CTR1 and the conduction status of first relay Y1 is shown in Table 1 below.

[0067]

[0068] Table 1

[0069] If transistor Q1 or Q2 fails (failure analysis is performed to determine if a single device fails), the full-pole disconnection requirement is still met. For example, if Q2 is short-circuited when not operating, i.e., NO2 in Table 1 above, the first relay Y1 is still off, and the heating wire is fully disconnected, de-energized, and safe. The same logic applies to Q1.

[0070] The operating logic of MCU1 and MCU2 is as follows: If the heating switch module 11 is a button, including a power button, gear selection, and Start button, MCU1 and MCU2 must both receive gear selection information and Start information after power-up before opening the first relay Y1. This prevents the heating coil from being energized by software or MCU failure when only one MCU is present and the user is not toasting bread. If either of the two MCUs receives a shutdown or emergency stop button signal, it closes the first relay Y1, preventing the heating coil from being unable to shut off if one MCU fails.

[0071] If the heating switch module 11 is a touch screen, click the touch screen, select the mode, then select the gear, and click start (click at least two different places on the touch screen to trigger the start bread toasting instruction). The touch screen MCU communicates with MCU1 and MCU2. Only when MCU1 and MCU2 successfully communicate with the touch screen MCU instruction will they input the signal to turn on the first relay Y1; when MCU1 and MCU2 detect that the bread toasting is finished or the timing of the corresponding gear of MCU1 and MCU2 toasting is finished, MCU1 and MCU2 turn off the first relay Y1 and control the bread tray to rise.

[0072] In addition, in the embodiment of the present invention, the power switch module 14 further includes a first diode D1, such as Figure 3 As shown, the first end of the first diode D1 is connected to the third end of the first transistor Q1 , and the second end of the first diode D1 is connected to the first end of the second transistor Q2 .

[0073] In the embodiment of the present invention, the power switch module 14 further includes a first resistor R1 and a second resistor R2. Figure 4 As shown, the second end of the first control module 12 is connected to the first end of the first resistor R1 , the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the first transistor Q1 , and the second end of the second resistor R2 is grounded.

[0074] In the embodiment of the present invention, the power switch module 14 further includes a third resistor R3 and a fourth resistor R4. Figure 5 As shown, the second end of the second control module 13 is connected to the first end of the third resistor R3 , the second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the first end of the third transistor Q3 , and the second end of the fourth resistor R4 is grounded.

[0075] In the embodiment of the present invention, the power switch module 14 further includes a fifth resistor R5 and a sixth resistor R6. Figure 6 As shown, the third end of the third transistor Q3 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6 and the second end of the second transistor Q2, and the second end of the sixth resistor R6 is connected to the first DC power supply.

[0076] In the embodiment of the present invention, the heating control circuit 10 further includes a heating protection module 16, such as Figure 7 As shown, the third end of the first control module 12 or the second control module 13 is connected to the first end of the heating protection module 16, the second end of the heating protection module 16 is connected to the sixth end of the power switch module 14, and the third end of the heating protection module 16 is connected to the second end of the heating module 15.

[0077] In the embodiment of the present invention, the heating protection module 16 includes a second relay Y2 and a fourth transistor Q4. Figure 8 As shown, the second relay includes a second coil L2 and a third switch K3. The third end of the first control module 12 or the second control module 13 is connected to the first end of the fourth transistor Q4, the second end of the fourth transistor Q4 is grounded, the third end of the fourth transistor Q4 is connected to the first end of the second coil L2, the second end of the second coil L2 is connected to the second DC power supply, the second end of the second switch K2 is connected to the first end of the third switch K3, and the second end of the third switch K3 is connected to the second end of the heating module 15.

[0078] In the embodiment of the present invention, the heating protection module 16 further includes a second diode D2, such as Figure 9 As shown, a first end of the second diode D2 is connected to the third end of the fourth transistor Q4, and a second end of the second diode D2 is connected to the second DC power supply.

[0079] In the embodiment of the present invention, the heating protection module 16 further includes a seventh resistor R7 and an eighth resistor R8. Figure 10 As shown, the third end of the first control module 12 or the second control module 13 is connected to the first end of the seventh resistor R7, the second end of the seventh resistor R7 is connected to the second end of the eighth resistor R8 and the first end of the fourth transistor Q4, and the second end of the eighth resistor R8 is grounded.

[0080] It should be noted that due to new safety regulations, a non-self-resetting secondary protection is required. If the primary all-pole protection fails, the secondary protection must be activated. The heating protection module 16 herein serves as a secondary protection. That is, when toasting is finished, if the all-pole shutdown fails, the secondary protection shuts off the heating wire within a specified time, preventing further heating. The heating protection module 16 herein is not limited to a relay; it can also be a thyristor, MOS, or the like.

[0081] Furthermore, when toasting bread in a toaster, the inside of the toaster is often darker than the outside. This is because the bread trays aren't completely insulated, resulting in thermal crosstalk. To address this, a single heating wire control is used. This switches off the inner heating wire in advance based on the internal temperature of the oven, the number of consecutive toasts, and the color of the bread on the outside.

[0082] In an embodiment of the present invention, a smart toaster can be configured with multiple slots (two or more) and multiple settings, allowing the machine to simultaneously toast bread at different settings. For example, one slot can be set to setting setting 2, while another slot can be set to setting setting 5. There are two options for this configuration. The first option is to have an automatic lifting motor in each slot. After toasting one slot, it can be raised directly, without waiting for the next slot to reach the desired setting. After the tray is raised, the user can directly take the bread.

[0083] The second method is to reduce costs by using a common lifting motor for both slots. The slot that is baked first will be raised after the other slot is finished. In this solution, when one slot is finished, even if the machine is still working, there will be a display or indicator light to inform the user. However, to ensure user safety, the heating wire of the slot that is baked first will still meet the full-pole disconnection requirement to prevent the user from taking the bread directly after the first slot is baked, which may cause electric shock. Figure 11 、 12 As shown, a single slot and a single control are used to achieve full-pole disconnection. The heating control circuit 10 includes at least one power switch module 14, at least one heating protection module 16, and at least one heating module 15. The number of power switch modules 14 is a multiple of the number of heating protection modules 16 and the number of heating modules 15.

[0084] In addition, for products that need to meet IEC standards, the heating wire is fully disconnected and needs to meet the 3.0 electrical clearance requirement. Therefore, for the first relay Y1, both sets of contacts on the AC end are required to meet the 3.0 electrical clearance. Relays that meet this requirement are all industrial-grade or solar photovoltaic devices, which are large in size and high in cost. Products that have no requirements for cost and volume can be used directly to reduce the control circuit. However, if the product has very high requirements for cost and volume and needs to use a low-power relay, multiple relays can be used in series, which is not limited to Figure 12 The two shown meet the 3.0 electrical clearance, and the relays can be opened and closed at the same time.

[0085] MCU1_CTR1 is set high, Figure 12 As shown, both Q1s are conducting, and the coils of both relays Y1 are pulled down to GND. If MCU2_CTR1 is set low, both Q2s are off, and both relays Y1 are not closed. If MCU2_CTR1 is set high, both Q2s are conducting, and the coils of both relays Y1 are pulled up to VCC_12V. If MCU1_CTR1 is set low, both Q1s are off, and both relays Y1 are not conducting. Only when both MCU1_CTR1 and MCU2_CTR1 are set high will both relays Y1 close simultaneously. When multiple relays are used in series, it is necessary to ensure that all relays open and close simultaneously, as shown in Table 2 below.

[0086]

[0087]

[0088] Table 2

[0089] The present invention provides an intelligent toaster comprising any one of the above-mentioned heating control circuits.

[0090] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0091] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A heating control circuit, characterized in that: The heating control circuit includes: a heating switch module, a first control module, a second control module, a power switch module and a heating module; The heating switch module is used to issue a first instruction; The first control module and the second control module are both used to receive the first instruction to drive the power switch module to close and the heating module to start heating; The heating switch module is used to issue a second instruction; The first control module or the second control module is used to receive the second instruction to drive the power switch module to turn off, and the heating module to stop heating; The first end of the heating switch module is connected to the first end of the first control module, and the second end of the heating switch module is connected to the first end of the second control module; the second end of the first control module is connected to the first end of the power switch module, and the second end of the second control module is connected to the second end of the power switch module; the third end of the power switch module is connected to the neutral line of the AC power supply, and the fourth end of the power switch module is connected to the live line of the AC power supply; the fifth end of the power switch module is connected to the first end of the heating module, and the sixth end of the power switch module is connected to the second end of the heating module; The power switch module includes a first relay, a first transistor, a second transistor, and a third transistor. The first relay includes a first coil, a first switch, and a second switch. The first end of the first switch is connected to the neutral line of the AC power supply, and the second end of the first switch is connected to the first end of the heating module. The first end of the second switch is connected to the live line of the AC power supply, and the second end of the second switch is connected to the second end of the heating module. The second end of the first control module is connected to the first end of the first transistor, the second end of the first transistor is grounded, the third end of the first transistor is connected to the first end of the first coil, and the second end of the first coil is connected to the first end of the second transistor. The second end of the second control module is connected to the third The first end of the triode and the second end of the third triode are grounded, the third end of the third triode is connected to the second end of the second triode, and the third end of the second triode is connected to the first DC power supply; the first control module and the second control module both receive the first instruction, the second end of the first control module and the second end of the second control module are both set to high, the first coil is energized, the first switch and the second switch are closed, and the heating module starts heating; the first control module or the second control module receives the second instruction, the second end of the first control module or the second end of the second control module is set to low, the first coil is not energized, the first switch and the second switch are disconnected, and the heating module stops heating.

2. The heating control circuit according to claim 1, characterized in that: The power switch module further includes a first diode, a first end of the first diode is connected to the third end of the first transistor, and a second end of the first diode is connected to the first end of the second transistor.

3. The heating control circuit according to claim 1, characterized in that: The power switch module also includes a first resistor and a second resistor. The second end of the first control module is connected to the first end of the first resistor. The second end of the first resistor is connected to the first end of the second resistor and the first end of the first transistor. The second end of the second resistor is grounded.

4. The heating control circuit according to claim 1, characterized in that: The power switch module also includes a third resistor and a fourth resistor. The second end of the second control module is connected to the first end of the third resistor. The second end of the third resistor is connected to the first end of the fourth resistor and the first end of the third transistor. The second end of the fourth resistor is grounded.

5. The heating control circuit according to claim 1, characterized in that: The power switch module also includes a fifth resistor and a sixth resistor. The third end of the third transistor is connected to the first end of the fifth resistor. The second end of the fifth resistor is connected to the first end of the sixth resistor and the second end of the second transistor. The second end of the sixth resistor is connected to the first DC power supply.

6. The heating control circuit according to any one of claims 1 to 4, characterized in that: The heating control circuit also includes a heating protection module, the third end of the first control module or the second control module is connected to the first end of the heating protection module, the second end of the heating protection module is connected to the sixth end of the power switch module, and the third end of the heating protection module is connected to the second end of the heating module.

7. The heating control circuit according to claim 6, characterized in that: The heating protection module includes a second relay and a fourth transistor, and the second relay includes a second coil and a third switch; The third end of the first control module or the second control module is connected to the first end of the fourth transistor, the second end of the fourth transistor is grounded, the third end of the fourth transistor is connected to the first end of the second coil, and the second end of the second coil is connected to the second DC power supply; The second end of the second switch is connected to the first end of the third switch, and the second end of the third switch is connected to the second end of the heating module.

8. The heating control circuit according to claim 7, characterized in that: The heating control circuit further includes a second diode, a first end of the second diode is connected to the third end of the fourth transistor, and a second end of the second diode is connected to the second DC power supply.

9. The heating control circuit according to claim 7, characterized in that: The heating control circuit also includes a seventh resistor and an eighth resistor. The third end of the first control module or the second control module is connected to the first end of the seventh resistor. The second end of the seventh resistor is connected to the second end of the eighth resistor and the first end of the fourth transistor. The second end of the eighth resistor is grounded.

10. The heating control circuit according to claim 1, characterized in that: The heating control circuit includes at least one power switch module, and the first relays in the power switch module are connected in series.

11. The heating control circuit according to claim 6, characterized in that: The heating control circuit includes at least one power switch module, at least one heating protection module, and at least one heating module; The number of the power switch modules is in a multiple relationship with the number of the heating protection modules and the number of the heating modules.

12. An intelligent toaster, characterized in that: The heating control circuit comprises the heating control circuit according to any one of claims 1 to 11.

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