Milk foam machine with intermittent heating function
The milk frother with intermittent heating function uses a main control chip and temperature detection circuit to precisely control the heating device, which solves the problem of excessive temperature rise caused by residual heat from the heating device, protects the nutritional value and taste of the milk, and avoids scorching at the bottom of the milk frother.
Patent Information
- Application Number
- CN202520124552.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing milk frothers have a problem during the heating process: residual heat generated after the heating device continues to heat the milk causes the milk temperature to rise again, which damages its nutritional value and taste.
Milk frothers with intermittent heating function control the intermittent operation of the heating device through the main control chip. Combined with temperature detection circuit and stirring device, they can accurately control the milk temperature and avoid excessive temperature rise caused by residual heat.
It achieves precise control of milk temperature, avoiding a temperature rise due to residual heat from the heating device, thus protecting the nutritional value and taste of the milk, while also preventing localized scorching at the bottom of the milk frother.
Smart Images
Figure CN223845471U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to milk frother technical field especially, it is a kind of milk frother with intermittent heating function. BACKGROUND
[0002] Milk frother is a kind of device that can be used to make milk froth or hot beverage, usually used with coffee machine, through the stirring device that is built-in in the container of milk frother, milk can be frothed, cooperate with the heating device in milk frother can realize hot milk frothing, heating milk and other functions, in this process, the heating temperature control of milk is very important, generally milk heating temperature control is between 60-70 degrees Celsius, the existing milk frother in working process, heating device continues to heat to set temperature and stop working, at this time, because there is still a lot of residual heat on heating device, the container is heated, resulting in the phenomenon that milk temperature is pulled up again, destroys the nutritional value and taste of milk. SUMMARY
[0003] In order to solve the above technical problems, the utility model provides a kind of milk frother with intermittent heating function, it is characterized by, including: inner container, shell and lid, the inner container is equipped with cavity, the inner container is installed in the shell, the lid is covered in the top of the shell, the inner container is equipped with heating device, stirring device and temperature detection circuit, the shell is equipped with heating control circuit, stirring control circuit, power supply circuit and main control chip, wherein, the heating control circuit further includes switching circuit and relay, the shell is equipped with control panel, commercial power supply alternating current input is connected with the input end of the power supply circuit and the one end of the relay normally open contact respectively, the output end of the power supply circuit is connected with the main control chip, the switching circuit, the stirring control circuit and the temperature detection circuit respectively, the output end of the main control chip is connected with the input end of the switching circuit and the input end of the stirring control circuit respectively, the output end of the control panel and the output end of the temperature detection circuit are connected with the input end of the main control chip, the output end of the switching circuit is connected with the coil input end of the relay, the other end of the relay normally open contact is connected with the input end of the heating device, the output end of the stirring control circuit is connected with the input end of the stirring device.
[0004] As the improvement of the milk frother with intermittent heating function, the heating control circuit further comprises a first triode, a second triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first electrolytic capacitor, a second electrolytic capacitor, a first diode and a first relay, the power supply circuit is further provided with a GND output end and a -12V output end, the commercial AC input is further provided with a first firewire end, the heating device is further provided with a second firewire end, the main control chip is further provided with a first output end, one end of the first resistor is connected with the first output end of the main control chip, the other end of the first resistor is connected with one end of the first capacitor, the other end of the first capacitor is connected with one end of the second resistor, the base of the first triode is connected with the other end of the second resistor, the emitter of the first triode is connected with the GND output end of the power supply circuit, the collector of the first triode is connected with one end of the third resistor, the other end of the third resistor is connected with the positive electrode of the first electrolytic capacitor, the positive electrode of the second electrolytic capacitor and one end of the fourth resistor respectively, the base of the second triode is connected with the other end of the fourth resistor and one end of the fifth resistor respectively, the emitter of the second triode, the other end of the fifth resistor, the negative electrode of the second electrolytic capacitor and the negative electrode of the first electrolytic capacitor are connected with the -12V output end of the power supply circuit respectively, the collector of the second triode is connected with one end of the first relay coil, the positive electrode of the first diode and one end of the second capacitor respectively, the other end of the first relay coil, the negative electrode of the first diode and the other end of the second capacitor are connected with the GND output end of the power supply circuit respectively, one end of the first relay normally open contact is connected with the first firewire end of the commercial AC input, the other end of the first relay normally open contact is connected with the second firewire end of the heating device, wherein the first relay and the relay are the same relay.
[0005] As the improvement of the milk frother with intermittent heating function, the heating control circuit further comprises a first triode, a second triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first electrolytic capacitor, a second electrolytic capacitor, a first diode and a first relay, the power supply circuit is further provided with a GND output end and a -12V output end, the commercial AC input is further provided with a first firewire end, the heating device is further provided with a second firewire end, the main control chip is further provided with a first output end, one end of the first resistor is connected with the first output end of the main control chip, the other end of the first resistor is connected with one end of the first capacitor, the other end of the first capacitor is connected with one end of the second resistor, the base of the first triode is connected with the other end of the second resistor, the emitter of the first triode is connected with the GND output end of the power supply circuit, the collector of the first triode is connected with one end of the third resistor, the other end of the third resistor is connected with the positive electrode of the first electrolytic capacitor, the positive electrode of the second electrolytic capacitor and one end of the fourth resistor respectively, the base of the second triode is connected with the other end of the fourth resistor and one end of the fifth resistor respectively, the emitter of the second triode, the other end of the fifth resistor, the negative electrode of the second electrolytic capacitor and the negative electrode of the first electrolytic capacitor are connected with the -12V output end of the power supply circuit respectively, the collector of the second triode is connected with one end of the first relay coil, the positive electrode of the first diode and one end of the second capacitor respectively, the other end of the first relay coil, the negative electrode of the first diode and the other end of the second capacitor are connected with the GND output end of the power supply circuit respectively, one end of the first relay normally open contact is connected with the first firewire end of the commercial AC input, the other end of the first relay normally open contact is connected with the second firewire end of the heating device, wherein the first relay and the relay are the same relay.
[0006] As the improvement of the milk frother with intermittent heating function, the milk frother further comprises a buzzer control circuit and a buzzer, an input end of the buzzer control circuit is connected with an output end of the main control chip, an output end of the buzzer control circuit is connected with an input end of the buzzer, an output end of the power supply circuit is connected with the buzzer control circuit, and the buzzer control circuit is used for controlling the working state of the buzzer according to the signal of the main control chip.
[0007] As the improvement of the milk frother with intermittent heating function, the temperature detection circuit further comprises a temperature detecting element, an output end of the temperature detecting element is connected with an input end of the temperature detection circuit, and the temperature detection circuit feeds back the temperature value detected by the temperature detecting element to the main control chip.
[0008] As the improvement of the milk frother with intermittent heating function, the temperature detecting element is arranged inside the cavity or outside the inner container.
[0009] As the improvement of the milk frother with intermittent heating function, the stirring device further comprises a magnetic drive stirring ring, a magnetic drive device and a driving motor, the driving motor is arranged below the inner container, the magnetic drive device is installed on the rotating shaft of the driving motor, the magnetic drive stirring ring is arranged at the bottom of the cavity and corresponds to the magnetic drive device, and an input end of the driving motor is connected with an output end of the stirring control circuit.
[0010] As the improvement of the milk frother with intermittent heating function, the heating device is an electromagnetic heating device or a resistance type heating device.
[0011] As the improvement of the milk frother with intermittent heating function, the milk frother further comprises a power supply base, the bottom end of the shell is provided with an upper connector, the power supply base is provided with a power plug and a lower connector, when the milk frother is placed on the power supply base, the upper connector and the lower connector are plugged to form electrical connection, an output end of the upper connector is connected with an input end of the power supply circuit and one end of the relay normally open contact respectively, an input end of the lower connector is connected with an output end of the power plug, and an input end of the power plug is connected with an AC input of commercial power.
[0012] The milk frother has the advantages that during the whole heating process, the main control chip controls the frothing device of the milk frother to froth according to the set parameters according to the "hot state frothing" working program parameters, the intermittent heating mode can more accurately control the milk temperature when the milk frother stops heating, the phenomenon that the milk temperature is again increased due to the large amount of residual heat of the heating body is avoided, and the phenomenon that the bottom of the milk frother is locally scorched due to continuous heating in the later stage of heating milk is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 Structure diagram of preferred embodiment of milk frother with intermittent heating function of the utility model;
[0014] Figure 2 Circuit block diagram of preferred embodiment of milk frother with intermittent heating function of the utility model;
[0015] Figure 3 Electronic circuit diagram of preferred embodiment of milk frother with intermittent heating function of the utility model; DETAILED DESCRIPTION
[0016] In the following, the utility model will be further described in combination with Figures 1 to 3 and in the preferred and other embodiments, it should be noted that the following described technical features can be arbitrarily combined to form new embodiments without conflict.
[0017] Reference Figures 1-2In the preferred embodiment, the utility model provides a milk frother with intermittent heating function, characterized by comprising: inner container 11, shell 12 and lid 13, the inner container 11 is equipped with cavity 111, the inner container 11 is installed in the shell 12, the lid 13 is covered in the top of shell 12, the inner container 11 is equipped with heating device 31, stirring device 32 and temperature detection circuit 27, the shell 12 is equipped with heating control circuit 25, stirring control circuit 26, power supply circuit 22 and main control chip 21, wherein, the heating control circuit 25 still includes switch circuit 251 and relay 252, the shell 12 is equipped with control panel 24, the input end of power supply circuit 22 and the one end of normally open contact of relay 252 are connected with AC input respectively, the output end of power supply circuit 22 is connected with main control chip 21, switch circuit 251, stirring control circuit 26 and temperature detection circuit 27 respectively, the input end of switch circuit 251 and the input end of stirring control circuit 26 are connected with the output end of main control chip 21 respectively, the output end of control panel 24 and the output end of temperature detection circuit 27 are connected with the input end of main control chip 21, the output end of switch circuit 251 is connected with the coil input end of relay 252, the other end of normally open contact of relay 252 is connected with the input end of heating device 31, the output end of stirring control circuit 26 is connected with the input end of stirring device 32, the heating control circuit 25 is used to control the working condition of heating device 31, the stirring control circuit 26 is used to control the working condition of stirring device 32, main control chip 21 is used for data calculation and program control, after user fills liquid into the inner container 11 and selects working mode on control panel 24, main control chip 21 controls stirring device 32 according to selected working mode by controlling stirring control circuit 26 and makes it work according to corresponding working procedure, main control chip 21 continuously detects the temperature value of liquid in the inner container 11 by temperature detection circuit 27, before the temperature value of liquid in the inner container 11 reaches first set threshold in working procedure, main control chip 21 controls heating device 31 to continuously heat by controlling heating control circuit 25, and main control chip 21 calculates the capacity of liquid filled in the inner container 11 according to the temperature value fed back by temperature detection circuit 27, heating time and heating power of heating device 31, during working process, main control chip 21 compares the temperature value fed back by temperature detection circuit 27 with first set threshold in working procedure, when the temperature value is lower than first set threshold, then continuous heating procedure is adopted, when the temperature value is higher than first set threshold, then intermittent heating procedure corresponding to the capacity of liquid filled in the inner container 11 is adopted,When the temperature value reaches the second set threshold, the main control chip 21 controls the heating control circuit 25 and the stirring control circuit 26 to stop the heating device 31 and the stirring device 32 simultaneously. In a specific implementation, the temperature detection circuit 27, the heating control circuit 25, the stirring control circuit 26, the power supply circuit 22, the main control chip 21 and the relay 252 can be integrally arranged on the same main control circuit board, and the main control circuit board is installed in the shell 12.
[0018] For example, in one embodiment, the user fills the inner container 11 with 100ml of milk, and selects the working mode of "hot milk frothing" on the control panel 24, the control panel 24 feeds back information to the main control chip 21, the main control chip 21 controls the stirring control circuit 26 to control the stirring device 32 to perform stirring work according to the corresponding working procedure of "hot milk frothing", the main control chip 21 continuously detects the temperature value of the milk in the inner container 11 through the temperature detection circuit 27, before the temperature value of the milk in the inner container 11 reaches the first set threshold value preset in the working procedure, the main control chip 21 controls the heating control circuit 25 to control the heating device 31 to continuously perform heating work, wherein the main control chip 21 sends a control signal to the switching circuit 251, the switching circuit 251 controls the coil of the relay 252 to work after receiving the signal, the normally open contact of the relay 252 is attracted, the alternating current input of the power supply is supplied to the heating device 31 through the normally open contact of the relay 252, and the heating device 31 performs heating work. Before the temperature value of the milk in the inner container 11 reaches the first set threshold value preset in the working procedure, the main control chip 21 calculates the capacity of the milk filled in the inner container 11 according to the temperature value fed back by the temperature detection circuit 27 within a unit time, the heating time and the heating power of the heating device 31, for example, the main control chip 21 can calculate that the capacity of the milk is 100ml according to the temperature change data of the milk within 30 seconds of initial heating and the heating power of the heating device 31. In the working process, the main control chip 21 compares the temperature value fed back by the temperature detection circuit 27 with the first set threshold value preset in the working procedure, when the temperature value is lower than the first set threshold value, the continuous heating program is adopted, in this embodiment, the first set threshold value is 50 degrees Celsius, when the temperature value is higher than the first set threshold value, the intermittent heating program corresponding to the calculated capacity of the liquid filled in the inner container 11 is adopted, for example, the intermittent heating program of 100ml capacity is: heating for 3 seconds and stopping heating for 7 seconds, and so on, for example, the intermittent heating program of 200ml capacity is: heating for 5 seconds and stopping heating for 8 seconds, and so on, when the main control chip 21 detects that the temperature value of the milk in the inner container 11 reaches the second set threshold value according to the temperature detection circuit 27, the main control chip 21 controls the heating control circuit 25 and the stirring control circuit 26 to control the heating device 31 and the stirring device 32 to stop working at the same time, in this embodiment, the second set threshold value is 67.5 degrees Celsius. Thus, by detecting and calculating the capacity of the heated liquid, different intermittent heating programs are adopted, so that when the milk frothing machine stops working, there is only a small amount of residual heat on the heating device 31, avoiding the situation that the temperature of the heated liquid is greatly increased again.
[0019] Reference Figure 3In the preferred embodiment, the utility model discloses a milk frother with intermittent heating function heating control circuit 25 still includes first triode Q5, second triode Q1, first resistance R13, second resistance R12, third resistance R21, fourth resistance R11, fifth resistance R18, first capacitor C12, second capacitor C13, first electrolytic capacitor C11, second electrolytic capacitor C10, first diode D10 and first relay REL1, the power supply circuit 22 still is equipped with GND output end and -12V output end, the commercial alternating current input still is equipped with first fire line end L1, the heating device 31 still is equipped with second fire line end L2, the main control chip 21 still is equipped with first output end, the first output end of main control chip 21 is connected with one end of first resistance R13, the other end of first resistance R13 is connected with one end of first capacitor C12, the other end of first capacitor C12 is connected with one end of second resistance R12, the base of first triode Q5 is connected with the other end of second resistance R12, the emitter of first triode Q5 is connected with the GND output end of power supply circuit 22, the collector of first triode Q5 is connected with one end of third resistance R21, the other end of third resistance R21 is connected with the positive pole of first electrolytic capacitor C11, the positive pole of second electrolytic capacitor C10 and one end of fourth resistance R11 respectively, the base of second triode Q1 is connected with the other end of fourth resistance R11 and one end of fifth resistance R18 respectively, the emitter of second triode Q1, the other end of fifth resistance R18, the negative pole of second electrolytic capacitor C10 and the negative pole of first electrolytic capacitor C11 are connected with the -12V output end of power supply circuit 22 respectively, the collector of second triode Q1 is connected with one end of first relay REL1 coil, the positive pole of first diode D10 and one end of second capacitor C13 respectively, the other end of first relay REL1 coil, the negative pole of first diode D10 and the other end of second capacitor C13 are connected with the GND output end of power supply circuit 22 respectively, one end of first relay REL1 normally open contact is connected with first fire line end L1 of commercial alternating current input, the other end of first relay REL1 normally open contact is connected with second fire line end L2 of heating device 31, wherein first relay REL1 is same as relay 252, first triode Q5, second triode Q1, first resistance R13, second resistance R12, third resistance R21, fourth resistance R11, fifth resistance R18, first capacitor C12, second capacitor C13, first electrolytic capacitor C11, second electrolytic capacitor C10 and first diode D10 constitute switch circuit 251.In the embodiment, the main control chip 21 can be a BF7412AM16-SJLX chip, the first output end of the main control chip 21 is the fourth pin of the BF7412AM16-SJLX chip, the first triode Q5, the second triode Q1, the first resistor R13, the second resistor R12, the third resistor R21, the fourth resistor R11, the fifth resistor R18, the first capacitor C12, the first electrolytic capacitor C11 and the second electrolytic capacitor C10 constitute the switching circuit 251, and the heating control circuit 25 works as follows: the first output end of the main control chip 21 outputs a PWM control signal with a 50% duty ratio, the control signal is generated at the base of the first triode Q5 after passing through the first capacitor C12, so that the first triode Q5 is turned on, the control signal is filtered by the filter circuit composed of the first electrolytic capacitor C11 and the second electrolytic capacitor C10 after passing through the first triode Q5, so that a stable driving level is generated at the base of the second triode Q1, so that the second triode Q1 is turned on, after the second triode Q1 is turned on, the control signal passes through the coil of the first relay REL1, the first relay REL1 starts to work, the normally open contact of the first relay REL1 is attracted, the first live wire end L1 of the AC power supply is connected with the second live wire end L2 of the heating device 31, and the heating device 31 starts to work.
[0020] Reference Figures 1-2 In the preferred embodiment, the milk frother with intermittent heating function further comprises an indicator lamp control circuit 28 and an indicator lamp 34, the input end of the indicator lamp control circuit 28 is connected with the output end of the main control chip 21, the output end of the indicator lamp control circuit 28 is connected with the input end of the indicator lamp 34, the output end of the power supply circuit 22 is connected with the indicator lamp control circuit, and the indicator lamp control circuit 28 is used for controlling the working state of the indicator lamp 34 according to the signal of the main control chip 21. In the embodiment, the indicator lamp 34 can be one or more light-emitting LEDs, or one or more groups of light-emitting LED light strips, when working, the indicator lamp control circuit 28 controls the working state of the indicator lamp 34 according to the signal of the main control chip 21, such as long light, flash light and the like, to prompt the user, in addition, the indicator lamp 34 can be arranged on the control panel 24, and the control panel 24 can be provided with touch buttons or mechanical buttons as operation buttons, so as to facilitate the operation of the user.
[0021] Reference Figures 1-2In the preferred embodiment, the milk frother with intermittent heating function further comprises a buzzer control circuit 29 and a buzzer 35, the input end of the buzzer control circuit 29 is connected to the output end of the main control chip 21, the output end of the buzzer control circuit 29 is connected to the input end of the buzzer 35, the output end of the power supply circuit is connected to the buzzer control circuit, and the buzzer control circuit 29 is used for controlling the working state of the buzzer 35 according to the signal of the main control chip 21. In operation, the buzzer control circuit 29 controls the buzzer 35 to emit corresponding sound according to the signal of the main control chip 21, such as long sound, intermittent sound and the like to prompt the user.
[0022] Reference Figures 1-2 In the preferred embodiment, the milk frother with intermittent heating function further comprises a buzzer control circuit 29 and a buzzer 35, the input end of the buzzer control circuit 29 is connected to the output end of the main control chip 21, the output end of the buzzer control circuit 29 is connected to the input end of the buzzer 35, the output end of the power supply circuit is connected to the buzzer control circuit, and the buzzer control circuit 29 is used for controlling the working state of the buzzer 35 according to the signal of the main control chip 21. In operation, the buzzer control circuit 29 controls the buzzer 35 to emit corresponding sound according to the signal of the main control chip 21, such as long sound, intermittent sound and the like to prompt the user.
[0023] Reference Figures 1-2 In the preferred embodiment, the milk frother with intermittent heating function further comprises a buzzer control circuit 29 and a buzzer 35, the input end of the buzzer control circuit 29 is connected to the output end of the main control chip 21, the output end of the buzzer control circuit 29 is connected to the input end of the buzzer 35, the output end of the power supply circuit is connected to the buzzer control circuit, and the buzzer control circuit 29 is used for controlling the working state of the buzzer 35 according to the signal of the main control chip 21. In operation, the buzzer control circuit 29 controls the buzzer 35 to emit corresponding sound according to the signal of the main control chip 21, such as long sound, intermittent sound and the like to prompt the user.
[0024] Reference Figures 1-2In the preferred embodiment, the stirring device 32 of the milk frother with intermittent heating function further comprises a magnetic drive stirring ring 321, a magnetic drive device 322 and a drive motor 323, the drive motor 323 is arranged below the inner container 11, the magnetic drive device 322 is installed on the rotating shaft of the drive motor 323, the magnetic drive stirring ring 321 is arranged at the bottom of the cavity 111 and corresponds to the magnetic drive device 322, and the input end of the drive motor 323 is connected to the output end of the stirring control circuit 26. In operation, the main control chip 21 sends a signal to the stirring control circuit 26, the stirring control circuit 26 controls the drive motor 323 to rotate according to the signal, the rotating shaft of the drive motor 323 drives the magnetic drive device 322 to rotate, and under the action of the magnetic force, the magnetic drive stirring ring 321 rotates with the magnetic drive device 322, and in the rotating process, the magnetic drive stirring ring 321 stirs the liquid in the cavity 111, thereby achieving the frothing effect.
[0025] Reference Figures 1-2 In the preferred embodiment, the heating device of the milk frother with intermittent heating function is an electromagnetic heating device or a resistance heating device. When the electromagnetic heating device is adopted, the electromagnetic heating coil can be arranged below the inner container 11, the inner container 11 is made of a magnetic conductive material, such as a ferromagnetic metal material, and the alternating magnetic field generated by the electromagnetic heating coil when working makes the inner container 11 generate heat, thereby realizing the heating function, in addition, the electromagnetic heating coil can also be arranged in a structure mode of being sleeved on the outer side of the inner container 11 to heat; when the resistance heating device is adopted, the electric heating tube can be arranged at the bottom of the inner container 11 to heat.
[0026] Reference Figures 1-2 In the preferred embodiment, the milk frother with intermittent heating function further comprises a power supply base 14, the bottom end of the shell 12 is provided with an upper connector 121, the power supply base 14 is provided with a power plug 141 and a lower connector 142, when the milk frother is placed on the power supply base 14, the upper connector 121 and the lower connector 142 are plugged to form an electrical connection, the output end of the upper connector 121 is connected to the input end of the power supply circuit 22 and one end of the normally open contact of the relay 252 respectively, the input end of the lower connector 142 is connected to the output end of the power plug 141, and the input end of the power plug 141 is connected to the AC input of the commercial power supply.
[0027] The utility model discloses a kind of beneficial effects of milk frother with intermittent heating function are as follows: in the whole heating process, the main control chip is according to "hot state frothing", "hot milk" and different function different working program parameters are set to control the frothing device of the milk frother according to set parameter to froth, adopt this intermittent heating mode can more accurately control milk frother stop heating milk temperature, avoid the case that the temperature of milk is greatly pulled up again due to the large amount of residual heat of the heating body, milk frother can also effectively avoid the phenomenon that milk frother bottom is partially scorched in the later period of heating milk due to continuous heating.
[0028] The above has been described in detail, and the above is only a preferred embodiment of the utility model, which cannot limit the scope of the utility model. Any equivalent changes and modifications made within the scope of the application are still within the scope of the utility model.
Claims
1. A milk frother with intermittent heating function, characterized in that, The utility model relates to a kind of electric kettle, including: Inner container, shell and lid, the inner container is equipped with cavity, the inner container is installed in the shell, the lid is covered in the shell top, the inner container is equipped with heating device, stirring device and temperature detection circuit, the shell is equipped with heating control circuit, stirring control circuit, power supply circuit and main control chip, wherein, the heating control circuit further includes switching circuit and relay, the shell is equipped with control panel, commercial power supply alternating current input is connected with the input end of the power supply circuit and the one end of the relay normally open contact respectively, the output end of the power supply circuit is connected with the main control chip, the switching circuit, the stirring control circuit and the temperature detection circuit respectively, the output end of the main control chip is connected with the input end of the switching circuit and the input end of the stirring control circuit respectively, the output end of the control panel and the output end of the temperature detection circuit are connected with the input end of the main control chip, the output end of the switching circuit is connected with the coil input end of the relay, the other end of the relay normally open contact is connected with the input end of the heating device, the output end of the stirring control circuit is connected with the input end of the stirring device.
2. The milk frother with intermittent heating function according to claim 1, characterized in that, The heating control circuit further comprises a first triode, a second triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first electrolytic capacitor, a second electrolytic capacitor, a first diode and a first relay, the power supply circuit is further provided with a GND output end and a -12V output end, the AC power input is further provided with a first live wire end, the heating device is further provided with a second live wire end, the main control chip is further provided with a first output end, one end of the first resistor is connected to the first output end of the main control chip, the other end of the first resistor is connected to one end of the first capacitor, the other end of the first capacitor is connected to one end of the second resistor, the base of the first triode is connected to the other end of the second resistor, the emitter of the first triode is connected to the GND output end of the power supply circuit, the collector of the first triode is connected to one end of the third resistor, the other end of the third resistor is connected to the positive pole of the first electrolytic capacitor, the positive pole of the second electrolytic capacitor and one end of the fourth resistor respectively, the base of the second triode is connected to the other end of the fourth resistor and one end of the fifth resistor respectively, the emitter of the second triode, the other end of the fifth resistor, the negative pole of the second electrolytic capacitor and the negative pole of the first electrolytic capacitor are connected to the -12V output end of the power supply circuit respectively, the collector of the second triode is connected to one end of the first relay, the positive pole of the first diode and one end of the second capacitor respectively, the other end of the first relay, the negative pole of the first diode and the other end of the second capacitor are connected to the GND output end of the power supply circuit respectively, one end of the normally open contact of the first relay is connected to the first live wire end of the AC power input, the other end of the normally open contact of the first relay is connected to the second live wire end of the heating device, wherein the first relay and the relay are the same relay.
3. The milk frother with intermittent heating function according to claim 1, characterized in that, The indicator lamp control circuit is connected to the output end of the main control chip, the output end of the indicator lamp control circuit is connected to the input end of the indicator lamp, and the output end of the power supply circuit is connected to the indicator lamp control circuit.
4. The milk frother with intermittent heating function according to claim 1, characterized in that, The buzzer control circuit is connected to the output end of the main control chip, the output end of the buzzer control circuit is connected to the input end of the buzzer, and the output end of the power supply circuit is connected to the buzzer control circuit.
5. The milk frother with intermittent heating function according to claim 1, characterized in that, The temperature detection circuit further comprises a temperature sensing element, and the output end of the temperature sensing element is connected to the input end of the temperature detection circuit.
6. The milk frother with intermittent heating function according to claim 5, characterized in that, The temperature sensing element is arranged inside the cavity or outside the inner container.
7. The milk frother with intermittent heating function according to claim 1, characterized in that, The stirring device further comprises a magnetic drive stirring ring, a magnetic drive device and a driving motor, the driving motor is arranged below the inner container, the magnetic drive device is installed on the rotating shaft of the driving motor, the magnetic drive stirring ring is arranged at the bottom of the cavity and corresponds to the magnetic drive device, and the input end of the driving motor is connected with the output end of the stirring control circuit.
8. The milk frother with intermittent heating function according to claim 1, characterized in that, The heating device is an electromagnetic heating device or a resistance heating device.
9. The milk frother with intermittent heating function according to claim 1, characterized in that, The power supply base is further provided, the bottom end of the shell is provided with an upper connector, the power supply base is provided with a power plug and a lower connector, when the milk frother is placed on the power supply base, the upper connector and the lower connector are plugged to form an electrical connection, the output end of the upper connector is connected with the input end of the power supply circuit and one end of the relay normally open contact respectively, the input end of the lower connector is connected with the output end of the power plug, and the input end of the power plug is connected with the AC input of the commercial power supply.