CN109199110B

CN109199110B - Milk frothing method, milk frothing apparatus, milk frothing machine, and computer-readable storage medium

Info

Publication number: CN109199110B
Application number: CN201710524213.8A
Authority: CN
Inventors: 徐中华
Original assignee: Guangdong Midea Consumer Electric Manufacturing Co Ltd
Current assignee: Guangdong Midea Consumer Electric Manufacturing Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2022-02-25
Anticipated expiration: 2037-06-30
Also published as: CN109199110A

Abstract

The invention provides a milk frothing method, a milk frothing device, a milk frothing machine and a computer readable storage medium, wherein the milk frothing method comprises the following steps: detecting whether a milk brewing instruction is received; when a milk foaming instruction is detected to be received, starting intermittent stirring operation of the stirring piece according to a preset stirring period, and starting intermittent heating operation of the milk liquid mixture according to a preset heating period; and detecting the temperature of the milk liquid mixture in real time during the execution of the intermittent heating operation, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a preset temperature threshold value. According to the technical scheme, the automatic stirring function and the automatic heating function are realized, the operation of a user is simplified, the intermittent heating operation is performed at the beginning, the bottom temperature of the container is favorably balanced, the probability of temperature misjudgment caused by a temperature sensor for temperature detection is reduced, the probability of insufficient milk temperature is further reduced, and the use experience of the user is improved.

Description

Milk frothing method, milk frothing apparatus, milk frothing machine, and computer-readable storage medium

Technical Field

The invention relates to the field of household appliances, in particular to a milk brewing method, a milk brewing device, a milk brewing machine and a computer readable storage medium.

Background

In the related art, although there are milk powder stirring devices respectively provided with a rotary stirring chamber and an electric heating device for respectively stirring and adjusting the temperature of milk to a desired temperature point for brewing infant milk powder, the following drawbacks still exist in the actual use process:

(1) aiming at the stirring operation, the stirring process is not optimized and limited, on one hand, a better stirring effect cannot be achieved, and on the other hand, the stirring process needs to be finished under the manual control of a user, so that the use experience of the user is influenced;

(2) to temperature control, although be provided with heating device and temperature regulation switch, temperature regulation control still needs user manual operation to accomplish on the one hand, and on the other hand, the heating process is uncontrollable, easily causes the temperature erroneous judgement to lead to influencing the heating effect, influences user's use and experiences.

Disclosure of Invention

The invention is based on at least one of the above technical problems, and provides a new milk frothing scheme, wherein when a milk frothing instruction is received, an intermittent stirring operation is started by a stirring piece according to a preset stirring period, and when the temperature of a milk liquid mixture in a milk frothing container is detected to be smaller than a preset temperature threshold value, an intermittent heating operation is started by a heating element according to the preset heating period, and when the temperature of the milk liquid mixture is increased to be larger than or equal to the preset temperature threshold value through the intermittent heating operation, the milk liquid is more uniformly mixed through the intermittent stirring operation, so that the milk frothing operation is completed.

In view of the above, the present invention provides a milk brewing method, comprising: detecting whether a milk brewing instruction is received; when a milk foaming instruction is detected to be received, starting intermittent stirring operation of the stirring piece according to a preset stirring period, and starting intermittent heating operation of the milk liquid mixture according to a preset heating period; and detecting the temperature of the milk liquid mixture in real time during the execution of the intermittent heating operation, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a preset temperature threshold value.

In the technical scheme, when a milk frothing instruction is received, the stirring piece starts to execute intermittent stirring operation according to a preset stirring period, and when the temperature of the milk liquid mixture in the milk frothing container is detected to be smaller than a preset temperature threshold value, the heating element starts to execute intermittent heating operation according to the preset heating period, and when the temperature of the milk liquid mixture is increased to be larger than or equal to the preset temperature threshold value through the intermittent heating operation, the milk liquid is mixed more uniformly through the intermittent stirring operation, so that the milk frothing operation is completed, on one hand, the automatic milk frothing stirring function and the automatic heating function are realized, compared with the prior art, the operation of a user is simplified, on the other hand, the intermittent heating operation is performed at the beginning, the bottom temperature of the container is favorably balanced, and the probability of temperature misjudgment caused by a temperature sensor for temperature detection is reduced, and then reduced the not enough probability of milk temperature, promoted user's use and experienced.

In the above technical solution, preferably, the method further includes: when detecting that a milk foaming instruction is received, detecting whether the temperature of the milk liquid mixture is smaller than a preset temperature threshold value or not, and starting intermittent heating operation when detecting that the temperature of the milk liquid mixture is smaller than the preset temperature threshold value.

In the technical scheme, when the temperature of the milk liquid mixture in the milk foaming container is detected to be smaller than the preset temperature threshold, the heating element starts to execute intermittent heating operation according to the preset heating period, and the heating device is prevented from being repeatedly started when a user uses water higher than the preset temperature threshold to soak the milk powder.

In any of the above technical solutions, preferably, during the intermittent heating operation, the temperature of the milk-liquid mixture is detected in real time, and when the temperature of the milk-liquid mixture is detected to be greater than or equal to a preset temperature threshold, the intermittent heating operation is stopped, specifically including: detecting the number of first periods passed by the intermittent heating operation during the execution of the intermittent heating operation, and detecting the temperature of the milk-liquid mixture in real time; and stopping the intermittent heating operation when the first period number is detected to be smaller than the first number threshold value and the temperature of the milk mixture is larger than or equal to the preset temperature threshold value.

In the technical scheme, the heating time is monitored in real time by detecting the first period quantity of the intermittent heating operation while the intermittent heating is carried out, if the heating time of the intermittent heating operation does not reach the preset time threshold (namely the heating time corresponding to the first period threshold), the temperature of the milk liquid mixture reaches the preset temperature threshold, and the intermittent heating operation can be stopped at the moment, so that the heating process is more controllable, and on the other hand, the manual regulation of a user is not needed, and the use experience of the user is improved.

Specifically, after receiving the milk frothing instruction, the temperature of the milk-liquid mixture is firstly detected to be 45 ℃ in relation to a preset temperature threshold (which may be 45 ℃ in particular), if the temperature is greater than or equal to 45 ℃, no heating is required, if the temperature is less than 45 ℃, a periodic intermittent heating operation is performed, wherein the preset heating period may be a heating period of 8 + -3 seconds, a heating stop period of 15 + -3 seconds, for example, 10 seconds for heating, 12 seconds for stopping heating as the preset heating period, or heating for 8 seconds, stopping heating for 10 seconds to be a preset heating period, carrying out intermittent full-power heating for N (2-6) periods, the heating power is 500w, the number of heating cycles and the temperature of the milk mixture are detected in the intermittent heating process, when the temperature of the milk-liquid mixture reached 45 c, the heating was stopped even if the heating period did not reach the preset period number.

In addition, when a milk frothing instruction is received, intermittent heating operation is firstly executed, mainly because if a user uses warm boiled water to brew milk powder, or if the user continuously frogs milk, or if the milk frothing operation is executed immediately after the disinfection operation is finished, because the temperature in the milk frothing container is higher, the temperature of the bottom of the milk frothing container can be balanced by adopting the intermittent heating operation, so that the temperature misjudgment probability of the temperature sensor is reduced, and the temperature of the milk mixture does not reach the standard, and if the bottom of the milk frothing container has residual temperature, namely continuous heating full-power operation is adopted for 10 seconds, the temperature detected by the temperature sensor reaches 45 ℃, the temperature of the milk mixture in the milk frothing container does not reach 45 ℃, so that the temperature of the milk is not reached to the standard.

The intermittent stirring operation can be stopped by presetting the number of operation cycles of the intermittent stirring operation when the stirring cycle reaches a preset number threshold value, and the intermittent stirring operation can also be synchronously controlled with the heating operation, namely when the temperature of the milk-liquid mixture is detected to be greater than or equal to the preset temperature threshold value, the heating operation is stopped and the stirring operation is stopped.

In any one of the above technical solutions, preferably, during the intermittent heating operation, the temperature of the milk-liquid mixture is detected in real time, and when the temperature of the milk-liquid mixture is detected to be greater than or equal to a preset temperature threshold, the intermittent heating operation is stopped, which specifically further includes: and when the first period number is detected to be larger than or equal to the first number threshold value and the temperature of the milk mixture is detected to be smaller than the preset temperature threshold value, the intermittent heating operation is switched to the continuous heating operation, and the continuous heating operation is stopped until the temperature of the milk mixture is detected to be larger than or equal to the preset temperature threshold value.

In this technical scheme, through detecting that first cycle quantity threshold value is greater than or equal to first quantity threshold value, heating element is when having carried out first quantity threshold value intermittent type nature heating cycle promptly, the temperature of milk liquid mixture still does not reach preset temperature threshold value, through switching to the continuous heating operation this moment, continuously heats milk liquid mixture, on the one hand can promote the efficiency that the bubble milk heated, on the other hand, through switching to the continuous heating operation with intermittent type nature operation, be favorable to promoting temperature sensor's detection precision, and then promote the accuracy of milk liquid mixture temperature control.

Specifically, when the heating period of the milk mixture reaches a preset period number but the temperature of the milk mixture does not reach 45 ℃, the full-power continuous heating operation is performed, the temperature of the milk mixture is continuously detected, and when the temperature of the milk mixture reaches a preset temperature value (45 ℃), the continuous heating operation is stopped.

In any one of the above technical solutions, preferably, after the step of "turning on the intermittent stirring operation of the stirring member according to the preset stirring period", the method further includes: detecting the number of second periods passed by the intermittent stirring operation when the intermittent stirring operation is started; and stopping the intermittent stirring operation when the second period number is detected to be larger than or equal to the second number threshold.

In the technical scheme, when the intermittent stirring operation is started, the number of the second period passed by the intermittent stirring operation is detected, so that the stirring operation is completed when the number of the second period is detected to be larger than or equal to the second number threshold, on one hand, the milk powder is uniformly mixed with the liquid through the stirring operation, and on the other hand, the time length passed by stirring can be the same as or close to the heating time length through setting the second number threshold of the stirring period, so that the milk soaking efficiency is further improved.

In any one of the above technical solutions, preferably, the milk frothing machine is provided with a zero-crossing sampling module connected to the stirring member, and before the step of turning on the intermittent stirring operation of the stirring member, the milk frothing machine further includes: determining the power supply frequency of the milk foaming machine; generating a square wave signal corresponding to the power supply frequency; in a sampling period of a zero-crossing sampling module, detecting whether a zero-crossing signal is acquired when the square wave signal is converted from a positive half cycle to a negative half cycle or is converted from the negative half cycle to the positive half cycle; when detecting and acquiring a zero-crossing signal, starting intermittent stirring operation; when detecting that no zero-crossing signal is collected, generating first alarm information, wherein the first alarm information is a first buzzing signal and/or a zero-crossing error reporting code displayed on a display component.

In the technical scheme, because the power supply is usually an alternating current signal, when the square wave signal is converted from the positive half cycle to the negative half cycle through detection, whether a zero-crossing signal exists or not, namely whether a point that current and voltage are 0 can be acquired or not is judged, when the zero-crossing signal is acquired, the zero-crossing sampling module works normally, at the moment, the relay can be turned on and off at the voltage and current of 0, so that the service life of elements of the relay is not influenced, the intermittent stirring operation can be triggered to be turned on, when the zero-crossing signal is not acquired, the zero-crossing sampling module is damaged, and the relay cannot be turned off and turned on at the point of 0 to cause damage to the elements, at the moment, the milk frothing machine is controlled to be stopped, alarm information is generated, and a user is prompted of zero-crossing error reporting so as to reduce the probability of abnormal working conditions.

The alarm mode can be buzzing, LED lamp flashing or displaying zero-crossing error-reporting codes on the display module.

In any of the above technical solutions, preferably, the detecting the temperature of the milk-liquid mixture by using the temperature sensing resistor further includes, before "starting the intermittent heating operation on the milk-liquid mixture" or "switching to the continuous heating operation": collecting real-time voltage of the temperature sensing resistor, and detecting whether the real-time voltage is greater than or equal to a first voltage threshold and less than or equal to a second voltage threshold; when the real-time voltage is detected to be greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold, starting intermittent heating operation or continuous heating operation; when the real-time voltage is smaller than the first voltage threshold value or larger than the second voltage threshold value, the heating operation and the stirring operation are closed, second alarm information is generated, wherein the second voltage threshold value is larger than the first voltage threshold value, and the second alarm information is a second buzzing signal and/or a temperature detection error-reporting code displayed on the display component.

In the technical scheme, the temperature sensor is a temperature sensing resistor, the real-time voltage of the temperature sensing resistor is acquired, whether the real-time voltage is greater than or equal to a first voltage threshold and less than or equal to a second voltage threshold is detected, when the real-time voltage is greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold, the temperature sensor is indicated to work normally, at the moment, the heating element can be started to work, when the real-time voltage is less than the first voltage threshold or greater than the second voltage threshold, the temperature sensor is indicated to work abnormally, the heating operation and the stirring operation are closed, the milk frothing machine is controlled to stop, an alarm is given, the probability of abnormal work caused by temperature misjudgment is reduced, the safety of the milk frothing machine is improved, and the use experience of a user is further improved.

Specifically, when the sampling voltage of the temperature sensor is less than 0x03 or more than 0xFD, it is indicated that the sensor sampling circuit is damaged, erroneous judgment will occur on the temperature acquisition, if the temperature sensor is not turned off in time, a great loss and even a potential safety hazard are caused to a user, and an abnormal condition occurs, the complete machine cannot be operated again, and the program gives an abnormal prompt.

Wherein, 0x03 and 0xFD (11111101) are 16-ary voltage values, and are converted into corresponding 10-ary voltage values, which are 3 and 254, respectively.

The alarm mode can be buzzing, LED lamp flashing or temperature detection error reporting codes displayed on the display module.

In any of the above technical solutions, preferably, the preset temperature threshold is greater than or equal to 45 ℃ and less than or equal to 50 ℃; the preset stirring period comprises a stirring time period and a stirring stopping time period, wherein the stirring time period is greater than or equal to 5 seconds and less than or equal to 11 seconds, and the stirring stopping time period is greater than or equal to 2 seconds and less than or equal to 8 seconds; the preset heating period comprises a heating time interval and a heating stopping time interval, wherein the heating time interval is greater than or equal to 5 seconds and less than or equal to 11 seconds, and the heating stopping time interval is greater than or equal to 12 seconds and less than or equal to 18 seconds; the first number threshold is greater than or equal to 2 and less than or equal to 6; the second quantity threshold is greater than or equal to 6 and less than or equal to 9.

In the technical scheme, as a first control manner, the preset stirring period is 8 seconds, the stirring stop period is 4 seconds, the second quantity threshold of intermittent stirring is 8, the preset heating period is 10 seconds, the heating stop period is 14 seconds, the first quantity threshold of intermittent heating is 4, and at this time, the time length for executing the intermittent stirring and the intermittent heating operation is the same.

As a second control manner, the preset stirring period is 9 seconds, the stirring stopping period is 5 seconds, the second quantity threshold value of the intermittent stirring is 6, the preset heating period is 10 seconds, the heating stopping period is 16 seconds, the first quantity threshold value of the intermittent heating is 4, and the time length of the intermittent stirring is shorter than the time length of the intermittent heating operation.

As a third control manner, the preset stirring period is 10 seconds, the stirring stopping period is 5 seconds, the second quantity threshold value of the intermittent stirring is 8, the preset heating period is 10 seconds, the heating stopping period is 15 seconds, the first quantity threshold value of the intermittent heating is 3, the time length for performing the intermittent stirring is longer than the time length for performing the intermittent heating operation, and after the intermittent heating operation is switched to the continuous heating operation, the stirring operation is still continuously performed.

According to the second aspect of the present invention, there is also provided a milk frothing apparatus comprising: the detection unit is used for detecting whether a milk brewing instruction is received or not; the starting unit is used for starting intermittent stirring operation of the stirring piece according to a preset stirring period and starting intermittent heating operation of the milk liquid mixture according to a preset heating period when the milk foaming instruction is detected to be received; the detection unit is further configured to: and detecting the temperature of the milk liquid mixture in real time during the execution of the intermittent heating operation, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a preset temperature threshold value.

In the technical scheme, when a milk frothing instruction is received, the stirring piece starts to execute intermittent stirring operation according to a preset stirring period, and when the temperature of the milk liquid mixture in the milk frothing container is detected to be smaller than a preset temperature threshold value, the heating element starts to execute intermittent heating operation according to the preset heating period, and when the temperature of the milk liquid mixture is increased to be larger than or equal to the preset temperature threshold value through the intermittent heating operation, the milk liquid is mixed more uniformly through the intermittent stirring operation, so that the milk frothing operation is completed, on one hand, the automatic milk frothing stirring function and the automatic heating function are realized, compared with the prior art, the operation of a user is simplified, on the other hand, the intermittent heating operation is performed at the beginning, the bottom temperature of the container is favorably balanced, and the probability of temperature misjudgment caused by a temperature sensor for temperature detection is reduced, thereby reducing the probability of insufficient temperature of the milk.

In the above technical solution, preferably, the detection unit is further configured to: when detecting that a milk foaming instruction is received, detecting whether the temperature of the milk liquid mixture is smaller than a preset temperature threshold value or not, and starting intermittent heating operation when detecting that the temperature of the milk liquid mixture is smaller than the preset temperature threshold value.

In any one of the above technical solutions, preferably, the detection unit is further configured to: detecting the number of first periods passed by the intermittent heating operation during the execution of the intermittent heating operation, and detecting the temperature of the milk-liquid mixture in real time; the milk making device further comprises: and the stopping unit is used for stopping the intermittent heating operation when the first period number is detected to be smaller than the first number threshold value and the temperature of the milk liquid mixture is larger than or equal to the preset temperature threshold value.

In any one of the above technical solutions, preferably, the method further includes: and the switching unit is used for switching the intermittent heating operation into the continuous heating operation when the first period number is detected to be larger than or equal to the first number threshold and the temperature of the milk liquid mixture is detected to be smaller than the preset temperature threshold, and stopping the continuous heating operation until the temperature of the milk liquid mixture is detected to be larger than or equal to the preset temperature threshold.

In any one of the above technical solutions, preferably, the detection unit is further configured to: detecting the number of second periods passed by the intermittent stirring operation when the intermittent stirring operation is started; the stop unit is further configured to: and stopping the intermittent stirring operation when the second period number is detected to be larger than or equal to the second number threshold.

In any one of the above technical solutions, preferably, the milk frothing machine is provided with a zero-crossing sampling module connected to the stirring member, and further includes: the determining unit is used for determining the power supply frequency of the milk frothing machine; the generating unit is used for generating a square wave signal corresponding to the power supply frequency; the detection unit is further configured to: in a sampling period of a zero-crossing sampling module, detecting whether a zero-crossing signal is acquired when the square wave signal is converted from a positive half cycle to a negative half cycle or is converted from the negative half cycle to the positive half cycle; the opening unit is also used for: when detecting and acquiring a zero-crossing signal, starting intermittent stirring operation; the milk making device further comprises: the first alarm unit is used for generating first alarm information when detecting that no zero-crossing signal is collected, wherein the first alarm information is a first buzzing signal or a zero-crossing error-reporting code displayed on the display component.

In any one of the above technical solutions, preferably, the temperature of the milk-liquid mixture is detected by using a temperature sensing resistor, and the apparatus further includes: the acquisition unit is used for acquiring the real-time voltage of the temperature sensing resistor and detecting whether the real-time voltage is greater than or equal to a first voltage threshold and less than or equal to a second voltage threshold; the opening unit is also used for: when the real-time voltage is detected to be greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold, starting intermittent heating operation or continuous heating operation; the device still includes: and the second alarm unit is used for controlling to close the heating operation and the stirring operation and generating second alarm information when the detected real-time voltage is smaller than the first voltage threshold value or larger than the second voltage threshold value, wherein the second voltage threshold value is larger than the first voltage threshold value, and the second alarm information is a second buzzing signal or a temperature detection error-reporting code displayed on the display component.

According to a third aspect of the present invention, there is also provided a milk frothing machine comprising a processor for implementing the milk frothing method as in any one of the embodiments of the first aspect of the invention when executing a computer program stored in a memory.

According to the fourth aspect of the present invention, there is also proposed a computer-readable storage medium having stored thereon a computer program (instructions) which, when executed by a processor, implements the milk frothing method as in any one of the embodiments of the first aspect of the invention.

Drawings

FIG. 1 shows a schematic flow diagram of a milk frothing method according to one embodiment of the invention;

FIG. 2 shows a schematic flow diagram of a zero-crossing detection method of a milk frother according to an embodiment of the invention;

FIG. 3 shows a schematic flow diagram of a method for detecting an abnormality of a temperature sensor of a milk frothing machine according to an embodiment of the invention;

FIG. 4 shows a schematic flow diagram of a milk frothing method according to another embodiment of the invention;

FIG. 5 shows a schematic block diagram of a milk frothing apparatus according to an embodiment of the invention;

fig. 6 shows a schematic block diagram of a milk frother according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced using third parties different from those described herein, and thus, the scope of the present invention is not limited by the specific embodiments disclosed below.

Fig. 1 shows a schematic flow diagram of a milk frothing method according to an embodiment of the invention.

As shown in fig. 1, a milk frothing method according to an embodiment of the invention includes: step 102, detecting whether a milk brewing instruction is received; when a milk foaming instruction is detected to be received, starting intermittent stirring operation of the stirring piece according to a preset stirring period, and starting intermittent heating operation of the milk liquid mixture according to a preset heating period; and detecting the temperature of the milk liquid mixture in real time during the execution of the intermittent heating operation, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a preset temperature threshold value.

Fig. 2 shows a schematic flow diagram of a zero-crossing detection method of a milk frother according to an embodiment of the invention.

As shown in fig. 2, a zero-crossing detection method of a milk frothing machine according to an embodiment of the invention includes: step 202, detecting whether the zero-crossing signal is abnormal, entering step 204 when the detection result is yes, and entering step 210 when the detection result is no; step 204, accumulating abnormal time of the zero-crossing signal; step 206, the abnormal time is more than 4 seconds, when the detection result is yes, the step 208 is entered, and when the detection result is no, the step 212 is entered; step 208, closing the current load and controlling the whole machine to stop working; step 210, clearing abnormal time of the zero-crossing signal; at step 212, the intermittent stirring operation is continued.

Fig. 3 shows a schematic flow chart of a method for detecting abnormality of a temperature sensor of a milk maker according to an embodiment of the present invention.

In any one of the above technical solutions, preferably, detecting whether the milk frothing machine enters an initial state specifically includes the following steps: step 302, detecting whether the voltage value of the temperature sensing resistor is less than 0x03, if the detection result is yes, entering step 308, and if the detection result is no, entering step 304; step 304, detecting whether the voltage value of the temperature sensing resistor is larger than 0xFD, if the detection result is yes, entering step 308, and if the detection result is no, entering step 306; step 306, continuing to perform heating operation; and step 308, closing the current load and controlling the whole machine to stop working.

Fig. 4 shows a schematic flow diagram of a milk frothing method according to another embodiment of the invention.

As shown in fig. 4, a milk frothing method according to another embodiment of the invention includes: step 402, starting a full-power intermittent heating operation and an intermittent stirring operation; step 404, detecting whether the voltage sampling value, the zero-crossing signal and the thermistor signal are normal, entering step 406 when the detection result is yes, and entering step 420 when the detection result is no; step 406, detecting whether the stirring times is more than N times, if the detection result is yes, entering step 422, and if the detection result is no, entering step 408; step 408, stirring for 8 +/-3 seconds, stopping stirring for 5 +/-3 stirring periods, and executing intermittent stirring operation; step 410, judging whether the temperature of the milk-liquid mixture is higher than 45 ℃, if the detection result is yes, entering step 418, and if the detection result is no, entering step 412; step 412, performing intermittent heating operation in a heating cycle of heating for 8 +/-3 seconds and stopping heating for 15 +/-3 seconds; step 414, judging whether the number of times of the heating cycle reaches M times, if the detection result is yes, entering step 416, and if the detection result is no, returning to step 412; step 416, performing full-power continuous heating; step 418, completing milk making operation; step 420, entering a protection prompting program; and step 422, judging whether the temperature of the milk-liquid mixture is higher than 45 ℃, if the detection result is yes, entering step 418, and if the detection result is no, returning to step 412.

Fig. 5 shows a schematic block diagram of a milk frothing apparatus according to an embodiment of the invention.

As shown in fig. 5, the milk frothing apparatus 500 according to the embodiment of the present invention includes: a detecting unit 502, configured to detect whether a milk frothing instruction is received; the starting unit 504 is used for starting intermittent stirring operation of the stirring piece according to a preset stirring period and starting intermittent heating operation of the milk liquid mixture according to a preset heating period when the milk foaming instruction is detected to be received; the detection unit 502 is further configured to: and detecting the temperature of the milk liquid mixture in real time during the execution of the intermittent heating operation, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a preset temperature threshold value.

In the above technical solution, preferably, the detecting unit 502 is further configured to: when detecting that a milk foaming instruction is received, detecting whether the temperature of the milk liquid mixture is smaller than a preset temperature threshold value or not, and starting intermittent heating operation when detecting that the temperature of the milk liquid mixture is smaller than the preset temperature threshold value.

In this technical scheme, when detecting that the temperature of the milk liquid mixture in the milk frothing container is less than the preset temperature threshold, according to the preset heating cycle, the heating element starts to perform intermittent heating operation, preventing the user from causing repeated starting of the heating device 500 when the user uses water higher than the preset temperature threshold to steep the milk powder.

In any of the above technical solutions, preferably, the detecting unit 502 is further configured to: detecting the number of first periods passed by the intermittent heating operation during the execution of the intermittent heating operation, and detecting the temperature of the milk-liquid mixture in real time; the milk frothing apparatus 500 further comprises: a stopping unit 506, configured to stop the intermittent heating operation when it is detected that the first number of cycles is smaller than the first number threshold and the temperature of the milk-liquid mixture is greater than or equal to a preset temperature threshold.

In any one of the above technical solutions, preferably, the method further includes: a switching unit 508, configured to switch the intermittent heating operation to the continuous heating operation when it is detected that the first number of cycles is greater than or equal to the first number threshold and the temperature of the milk-liquid mixture is less than the preset temperature threshold, and stop the continuous heating operation until it is detected that the temperature of the milk-liquid mixture is greater than or equal to the preset temperature threshold.

In any of the above technical solutions, preferably, the detecting unit 502 is further configured to: detecting the number of second periods passed by the intermittent stirring operation when the intermittent stirring operation is started; the stopping unit 506 is further configured to: and stopping the intermittent stirring operation when the second period number is detected to be larger than or equal to the second number threshold.

In any one of the above technical solutions, preferably, the milk frothing machine is provided with a zero-crossing sampling module connected to the stirring member, and further includes: the determining unit is used for determining the power supply frequency of the milk frothing machine; a generating unit 510, configured to generate a square wave signal corresponding to a power frequency; the detection unit 502 is further configured to: in a sampling period of a zero-crossing sampling module, detecting whether a zero-crossing signal is acquired when the square wave signal is converted from a positive half cycle to a negative half cycle or is converted from the negative half cycle to the positive half cycle; the opening unit 504 is further configured to: when detecting and acquiring a zero-crossing signal, starting intermittent stirring operation; the milk frothing apparatus 500 further comprises: the first alarm unit 512 is configured to generate first alarm information when detecting that no zero-crossing signal is acquired, where the first alarm information is a first buzzer signal or a zero-crossing error reporting code displayed on the display module.

In any of the above technical solutions, preferably, the temperature of the milk-liquid mixture is detected by using a temperature sensing resistor, and the apparatus 500 further includes: the acquisition unit 514 is used for acquiring the real-time voltage of the temperature sensing resistor and detecting whether the real-time voltage is greater than or equal to a first voltage threshold and less than or equal to a second voltage threshold; the opening unit 504 is further configured to: when the real-time voltage is detected to be greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold, starting intermittent heating operation or continuous heating operation; the apparatus 500 further comprises: and a second alarm unit 516, configured to control to close the heating operation and the stirring operation when the real-time voltage is detected to be smaller than the first voltage threshold or larger than the second voltage threshold, and generate second alarm information, where the second voltage threshold is larger than the first voltage threshold, and the second alarm information is a second buzzer signal or a temperature detection error reporting code displayed on the display module.

As shown in fig. 6, the milk frothing machine 600 according to an embodiment of the invention comprises a processor 602, the processor 602 being configured to implement the milk frothing method according to any of the embodiments of the first aspect of the invention when executing a computer program stored in a memory 604.

The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.

It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by hardware instructions of a program, and the program may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM), or other Memory, such as a magnetic disk, or a combination thereof, A tape memory, or any other medium readable by a computer that can be used to carry or store data.

The technical scheme of the invention is explained in detail in combination with the attached drawings, on one hand, the automatic milk brewing function is realized, on the other hand, the temperature of the milk is in a constant temperature range, and the use experience of a user is improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A milk frothing method applicable to a milk frothing machine provided with a milk frothing container for containing a milk mixture, and a stirring piece is arranged in the milk frothing container, and is characterized by comprising the following steps:

detecting whether a milk brewing instruction is received;

when the milk foaming instruction is detected to be received, starting intermittent stirring operation of the stirring piece according to a preset stirring period, and starting intermittent heating operation of the milk liquid mixture according to a preset heating period;

detecting the temperature of the milk liquid mixture in real time during the intermittent heating operation, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a preset temperature threshold;

the milk frothing machine is provided with a zero-crossing sampling module connected to the stirring piece, and before the step of starting intermittent stirring operation of the stirring piece, the milk frothing machine further comprises:

generating a corresponding square wave signal according to the power frequency of the milk frothing machine;

detecting whether a zero-crossing signal is acquired when the square wave signal is converted from a positive half cycle to a negative half cycle or is converted from the negative half cycle to the positive half cycle in a sampling period of the zero-crossing sampling module;

when the zero-crossing signal is detected and collected, starting the intermittent stirring operation;

when the zero-crossing signal is detected not to be collected, controlling the milk frothing machine to stop, and generating first alarm information;

detecting whether the temperature of the milk mixture is smaller than the preset temperature threshold value or not when the milk foaming instruction is received, and starting the intermittent heating operation when the temperature of the milk mixture is smaller than the preset temperature threshold value;

in the process of executing the intermittent heating operation, detecting the temperature of the milk liquid mixture in real time, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a set temperature threshold, specifically comprising:

detecting the number of first periods passed by the intermittent heating operation during the intermittent heating operation, and detecting the temperature of the milk-liquid mixture in real time;

stopping the intermittent heating operation when it is detected that the first number of cycles is less than a first number threshold and the temperature of the milk-liquid mixture is greater than or equal to the preset temperature threshold.

2. The milk frothing method according to claim 1, wherein during the intermittent heating operation, the temperature of the milk-liquid mixture is detected in real time, and when the temperature of the milk-liquid mixture is detected to be greater than or equal to a preset temperature threshold, the intermittent heating operation is stopped, and the method further comprises:

when detecting that the first number of cycles is greater than or equal to the first number threshold and the temperature of the milk-liquid mixture is less than the preset temperature threshold, switching the intermittent heating operation to a continuous heating operation until stopping the continuous heating operation when detecting that the temperature of the milk-liquid mixture is greater than or equal to the preset temperature threshold.

3. The milk frothing method according to claim 2, characterized by further comprising, after the step of "turning on the intermittent stirring operation of the stirring member according to a preset stirring period", the step of:

detecting the number of second periods passed by the intermittent stirring operation when the intermittent stirring operation is started;

stopping the intermittent stirring operation upon detecting that the second period number is greater than or equal to a second number threshold.

4. The milk frothing method according to any of claims 1-3, characterized in that the first alarm message is a first beep signal, and/or a zero-crossing error code displayed on a display component.

5. The milk frothing method according to any of claims 1-3, characterized in that the temperature of the milk mixture is detected using a temperature sensing resistor, and before the "turning on the intermittent heating operation of the milk mixture", further comprising:

collecting real-time voltage of the temperature sensing resistor, and detecting whether the real-time voltage is greater than or equal to a first voltage threshold and less than or equal to a second voltage threshold;

turning on the intermittent heating operation upon detecting that the real-time voltage is greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold;

when the real-time voltage is detected to be smaller than the first voltage threshold or larger than the second voltage threshold, the heating operation and the stirring operation are closed, and second alarm information is generated,

the second voltage threshold is larger than the first voltage threshold, and the second alarm information is a second buzzing signal and/or a temperature detection error-reporting code displayed on the display component.

6. The milk frothing method according to claim 2 or 3, characterized in that the temperature of the milk mixture is detected using a temperature sensing resistor, and before the "switching to the continuous heating operation", further comprising:

when the real-time voltage is detected to be greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold, starting the continuous heating operation;

7. The milk frothing method according to claim 3,

the preset temperature threshold is greater than or equal to 45 ℃ and less than or equal to 50 ℃;

the preset stirring period comprises a stirring time period and a stirring stopping time period, wherein the stirring time period is greater than or equal to 5 seconds and less than or equal to 11 seconds, and the stirring stopping time period is greater than or equal to 2 seconds and less than or equal to 8 seconds;

the preset heating period comprises a heating time interval and a heating stopping time interval, wherein the heating time interval is greater than or equal to 5 seconds and less than or equal to 11 seconds, and the heating stopping time interval is greater than or equal to 12 seconds and less than or equal to 18 seconds;

the first number threshold is greater than or equal to 2 and less than or equal to 6;

the second number threshold is greater than or equal to 6 and less than or equal to 9.

8. A milk frothing device is suitable for a milk frothing machine, the milk frothing machine is provided with a milk frothing container for containing milk liquid mixture, a stirring piece is arranged in the milk frothing container, and the milk frothing device is characterized by comprising:

the detection unit is used for detecting whether a milk brewing instruction is received or not;

the starting unit is used for starting the intermittent stirring operation of the stirring piece according to a preset stirring period and starting the intermittent heating operation of the milk liquid mixture according to a preset heating period when the milk foaming instruction is detected to be received;

the detection unit is further configured to: detecting the temperature of the milk liquid mixture in real time during the intermittent heating operation, and stopping the intermittent heating operation when the detected temperature of the milk liquid mixture is greater than or equal to a preset temperature threshold;

the milk machine that steeps is provided with and is connected to the zero cross sampling module of stirring, still includes:

the generating unit is used for generating a corresponding square wave signal according to the power frequency of the milk frothing machine;

the detection unit is further configured to: detecting whether a zero-crossing signal is acquired when the square wave signal is converted from a positive half cycle to a negative half cycle or is converted from the negative half cycle to the positive half cycle in a sampling period of the zero-crossing sampling module;

the opening unit is further configured to: when the zero-crossing signal is detected and collected, starting the intermittent stirring operation;

the milk frothing device further comprises:

the first alarm unit is used for controlling the milk frothing machine to stop when the zero-crossing signal is not acquired, and generating first alarm information;

the detection unit is further configured to: detecting whether the temperature of the milk mixture is smaller than the preset temperature threshold value or not when the milk foaming instruction is received, and starting the intermittent heating operation when the temperature of the milk mixture is smaller than the preset temperature threshold value;

the detection unit is further configured to: detecting the number of first periods passed by the intermittent heating operation during the intermittent heating operation, and detecting the temperature of the milk-liquid mixture in real time;

the milk frothing device further comprises:

a stopping unit for stopping the intermittent heating operation when it is detected that the first number of cycles is less than a first number threshold and the temperature of the milk-liquid mixture is greater than or equal to the preset temperature threshold.

9. The milk frothing apparatus of claim 8, further comprising:

the switching unit is used for switching the intermittent heating operation to the continuous heating operation when the first period number is detected to be larger than or equal to the first number threshold and the temperature of the milk-liquid mixture is detected to be smaller than the preset temperature threshold, and stopping the continuous heating operation until the temperature of the milk-liquid mixture is detected to be larger than or equal to the preset temperature threshold.

10. The milk frothing apparatus according to claim 9,

the detection unit is further configured to: detecting the number of second periods passed by the intermittent stirring operation when the intermittent stirring operation is started;

the stop unit is further configured to: stopping the intermittent stirring operation upon detecting that the second period number is greater than or equal to a second number threshold.

11. The milk frothing apparatus according to any of the claims 8 to 10, characterized in that the first alarm information is a first beep signal and/or a zero-crossing error code displayed on a display component.

12. The milk frothing apparatus of any of claims 8-10, wherein the temperature of the milk mixture is detected using a temperature sensing resistor, further comprising:

the acquisition unit is used for acquiring the real-time voltage of the temperature sensing resistor and detecting whether the real-time voltage is greater than or equal to a first voltage threshold and less than or equal to a second voltage threshold;

the opening unit is further configured to: turning on the intermittent heating operation upon detecting that the real-time voltage is greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold;

the device further comprises:

a second alarm unit, configured to close the heating operation and the stirring operation and generate second alarm information when the real-time voltage is detected to be smaller than the first voltage threshold or larger than the second voltage threshold,

13. The milk frothing apparatus of claim 9 or 10, wherein a temperature sensing resistor is used to detect the temperature of the milk mixture, further comprising:

the opening unit is further configured to: when the real-time voltage is detected to be greater than or equal to the first voltage threshold and less than or equal to the second voltage threshold, starting the continuous heating operation;

the device further comprises:

14. The milk frothing apparatus according to claim 10,

15. A milk frothing machine, characterized in that it comprises a processor for carrying out the steps of the method according to any of claims 1-7 when executing a computer program stored in a memory.

16. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program realizing the steps of the method according to any one of claims 1-7 when executed by a processor.