WO2022205902A1

WO2022205902A1 - Method and system for controlling rotating speed of stirring motor of ice cream machine based on temperature and forming degree

Info

Publication number: WO2022205902A1
Application number: PCT/CN2021/128541
Authority: WO
Inventors: 王新兵
Original assignee: 中绅科技(广东)有限公司
Priority date: 2021-03-29
Filing date: 2021-11-04
Publication date: 2022-10-06
Also published as: CN114732078A; CN113068760A

Abstract

An ice cream machine for controlling a rotating speed of a stirring motor of an ice cream machine based on a temperature and a forming degree, and a control method therefor. The ice cream machine further comprises a control system; the control system comprises a main controller, a temperature measurement module, and a frequency converter; the frequency converter is connected to the stirring motor and used for adjusting the input frequency of the stirring motor; the temperature measurement module is configured to measure the temperature of an ice cream material in an evaporation cylinder or an air return temperature value of the evaporation cylinder, and transmit a temperature measurement value to the main controller; the frequency converter obtains a real-time working torque value of the stirring motor, and transmits the measured working torque value to the main controller so as to obtain the real-time forming degree proportion value of an ice cream in the evaporation cylinder; and the main controller adjusts the output power frequency of the frequency converter according to either of the temperature measurement value and the real-time forming degree proportion value, or the combination of the temperature measurement value and the real-time forming degree proportion value, so as to adjust the rotating speed of the stirring motor. The method can reduce the energy consumption and noise of the ice cream machine.

Description

Method and system for controlling speed of stirring motor of ice cream maker based on temperature and molding degree

technical field

The invention relates to the technical field of ice cream machines, in particular to a method for controlling the rotational speed of a stirring motor of an ice cream machine based on temperature and molding degree.

Background technique

In the existing ice cream machine, the ice cream is formed in the evaporating cylinder of the ice cream machine, and the forming process of the ice cream material is roughly divided into three forming stages: liquid stage, solid-liquid mixed stage and solid stage. During the molding process, the ice cream material is continuously stirred by the agitator in the evaporation cylinder.

In the traditional ice cream machine, during the working process of the stirring motor driving the stirrer under the rated voltage and rated frequency (rotation speed), in different molding stages, the viscosity of the ice cream material in the evaporation cylinder is different, and the resistance of the stirrer during stirring is also different. As the viscosity of the ice cream material changes, as the load of the stirring motor increases, the motor speed naturally decreases according to its own motor design characteristics.

After the ice cream material in the evaporation cylinder reaches the preset final viscosity/hardness, the ice cream machine enters the standby state, so that the ice cream material maintains the final viscosity/hardness range.

After the ice cream in the evaporating cylinder is sold, the new liquid ice cream slurry will be replenished into the evaporating cylinder. At this time, the average viscosity of the ice cream material in the evaporating cylinder will suddenly decrease. characteristic and naturally increase or return to the rated speed.

It takes a long time for the ice cream material to cool down from the liquid state to the freezing point. At this stage, the load of the stirring motor is small. During this period, the speed of the stirring motor will maintain the rated speed, and the liquid ice cream material does not need too high stirring speed. It can be stirred evenly, so in this stage, the agitator rotates at the rated high speed for a long time, which causes energy waste, and also produces a large noise.

To sum up, in traditional ice cream machines, the speed control of the stirrer is unreasonable. When the ice cream material is in liquid state or when the ice cream machine is in standby, the speed of the stirrer will be excessive, causing energy waste and increasing the noise of the ice cream machine.

The Chinese Patent Publication No. CN101129153B discloses a soft ice cream machine with frequency conversion control function. The cake-making process of the machine controls the power output of the motor and the speed by changing the frequency. For example, in the early stage of cake making, the rotation speed can be slightly higher. As the cooling process continues to accumulate, the ice cream cake body will become harder and harder, and the resistance will also increase. Correspondingly, the current of the stirring motor is gradually increased, which makes the cake body noise when stirring. Small, easy to adjust speed, stable starting torque, high efficiency, can make the cake body stick evenly. Although the ice cream machine controls the motor speed by changing the frequency in the initial stage of refrigeration (cake) and during the refrigeration process, the refrigeration process is constantly changing with different working states such as feeding, discharging, and standby. The specific control method of the ice cream machine under different working conditions.

SUMMARY OF THE INVENTION

The invention provides a method for controlling the rotational speed of the stirring motor of an ice cream maker based on temperature and molding degree, aiming to control the rotational speed of the stirring motor through a frequency converter and reduce the energy consumption and working noise of the ice cream maker.

Above-mentioned purpose of the present invention is achieved through the following technical solutions:

A method for controlling the rotational speed of an ice cream machine stirring motor based on temperature and molding degree, the ice cream machine comprises an evaporation cylinder, a stirrer and a stirring motor, the agitator is located in the evaporation cylinder for stirring ice cream, and the stirring motor for driving the agitator to rotate,

The ice cream machine also includes a control system, the control system includes a main controller, a temperature monitoring module and a frequency converter, the frequency converter is connected to the stirring motor for adjusting the input frequency of the stirring motor,

The temperature monitoring module is used to monitor the temperature of the ice cream material in the evaporating cylinder or the temperature value of the return air of the evaporating cylinder, and transmit the temperature monitoring value to the main controller; the frequency converter obtains the real-time operation of the stirring motor Torque value, and transmit the monitored working torque value to the main controller, specifically, the main controller presets the real-time working torque value of the inverter at different working frequencies and the ice cream real-time forming degree proportional value The empirical relationship is obtained according to the empirical relationship of the current working frequency of the frequency converter to obtain the real-time forming degree ratio value of the ice cream in the evaporation cylinder, corresponding to the working condition of the ice cream machine, and the main controller is based on the temperature monitoring value, Any one or a combination of the two items of the real-time forming degree ratio value dynamically adjusts the output power frequency of the frequency converter, thereby adjusting the rotational speed of the stirring motor.

The present invention obtains the temperature value signal of the ice cream material and the torque signal of the stirring motor inside the ice cream machine, wherein the torque signal of the stirring motor can reflect the hardness/viscosity state of the ice cream in the evaporating cylinder. Obtain the hardness/viscosity state of the ice cream corresponding to the real-time working current, rotation speed or temperature, that is, the real-time forming degree of the ice cream can be obtained. The dynamic real-time forming degree value, the forming degree value is expressed in the form of a proportional value, which is called the forming degree proportional value. The ice cream machine generally has states such as refrigeration and standby, and can be subdivided into multiple working conditions according to the working state of the ice cream machine. The present invention determines the working state of the ice cream machine according to the change of the temperature and torque signals The speed of the stirring motor corresponding to the different working states is preset, and the speed adjustment is realized by the frequency converter, thereby reducing the energy consumption of the stirring motor and reducing the working noise.

The present invention has the following preferred designs:

The main controller is provided with the following temperature control conditions and molding degree control conditions,

Temperature Control Conditions:

1) The temperature monitoring value is within the set temperature range A1, and the output power frequency of the inverter is adjusted to be C1% of the rated grid frequency,

2) The temperature monitoring value is within the set temperature range A2, and the output power frequency of the inverter is adjusted to be C2% of the rated grid frequency,

3) The temperature monitoring value is within the set temperature range A3, and the output power frequency of the inverter is adjusted to be C3% of the rated grid frequency,

By analogy, set i continuous temperature ranges A1~Ai with gradually decreasing temperature, and set the output power frequency of the inverter to be Ci% of the rated grid frequency corresponding to each temperature range Ai, where i is a positive integer, C1~Ci gradually increase;

Forming degree control conditions:

1) The real-time forming degree proportional value≤initial forming degree proportional value+B1%, adjust the output power frequency of the inverter to be CC1% of the rated grid frequency,

2) Initial molding degree proportional value + B1% < the real-time molding degree proportional value ≤ initial molding degree proportional value + B2%, adjust the output power frequency of the inverter to CC2% of the rated grid frequency,

3) Initial molding degree proportional value + B2% < the real-time molding degree proportional value≤initial molding degree proportional value + B3%, adjust the output power frequency of the inverter to CC3% of the rated grid frequency,

Each working gear of the ice cream machine is preset with a corresponding initial forming degree ratio value, and so on, each working gear is set with j forming degree ratio difference values B1~Bj, and the interval corresponding to each forming degree ratio value is set. The output power frequency of the fixed inverter is CCj% of the rated grid frequency, where j is a positive integer, B1~Bj gradually increases, and CC1~CCj gradually increases;

The priority level of the temperature control condition and the forming degree control condition is set according to the working condition of the ice cream machine, and the output power frequency of the inverter is adjusted by selecting the temperature control condition or forming degree control condition corresponding to the current working condition.

As a reference embodiment, i=4 in the temperature control conditions, wherein A1≥15°C, 15°C>A2≥5°C, 5°C>A3≥-5°C, -5°C>A4≥-28°C; C1～ The corresponding values of C4 are C1=40, C2=60, C3=80, and C4=100.

In the forming degree control condition, j=4, where B1∈[1,5], B2∈(5,10], B3∈(10,20], B4∈(20,30]; CC1～CC4 correspond to the values are CC1=40, CC2=60, CC3=80, CC4=100.

The above parameters need to be adjusted reasonably according to the characteristics of the ice cream machine.

The invention also adds a post-starting judgment condition. If the temperature monitoring value is greater than the control system setting value Q when starting up, the frequency converter's output power frequency is adjusted to be D% of the rated grid frequency and runs for a period of time T.

Q=10°C, D=180, T=30S. The function of this judgment condition is that when the temperature in the evaporating cylinder is high after the machine is turned on, set the working time T to make the speed of the stirring motor higher than the normal speed, so that the ice cream material can be fully expanded; it is also possible to set a specific control key, and enter into high-speed stirring by manual operation after power on, so as to improve the puffing effect of liquid ice cream.

Another embodiment of the present invention also provides an ice cream machine control system, comprising:

a temperature monitoring module, which is used to monitor the temperature of the ice cream material in the evaporating cylinder of the ice cream machine or the temperature value of the return air of the evaporating cylinder;

a frequency converter, wherein the frequency converter obtains the real-time working torque value of the stirring motor;

The main controller, the main controller obtains the real-time forming degree ratio value of the ice cream in the evaporation cylinder according to the current working torque value of the frequency converter, corresponding to the working condition of the ice cream machine, and the main controller according to the temperature monitoring value . Any one or a combination of the two items of real-time forming degree ratio value dynamically adjusts the output power frequency of the frequency converter, and then adjusts the rotational speed of the stirring motor.

In one of the embodiments, the main controller is provided with the following temperature control conditions:

By analogy, set i continuous temperature ranges A1~Ai with gradually decreasing temperature, and set the output power frequency of the inverter to be Ci% of the rated grid frequency corresponding to each temperature range Ai, where i is a positive integer, C1~Ci gradually increase.

In one embodiment, i=4 in the temperature control condition, wherein A1≥15°C, 15°C>A2≥5°C, 5°C>A3≥-5°C, -5°C>A4≥-28°C; The corresponding values of C1 to C4 are C1=40, C2=60, C3=80, and C4=100.

In one of the embodiments, the main controller is set with the following forming degree control conditions:

In one embodiment, j=4 in the forming degree control condition, wherein B1∈[1,5], B2∈(5,10], B3∈(10,20], B4∈(20,30] ; The corresponding values of CC1 to CC4 are CC1=40, CC2=60, CC3=80, and CC4=100.

Another embodiment of the present invention also provides an ice cream machine, comprising:

Evaporating cylinder;

a stirrer, which is located in the evaporating cylinder for stirring ice cream;

a stirring motor, the stirring motor is used to drive the agitator to rotate; and

The ice cream maker control system according to any one of the above embodiments.

Another embodiment of the present invention also provides a control method for an ice cream machine, comprising the following steps:

Monitor the temperature of the ice cream material in the evaporating cylinder of the ice cream machine or the return air temperature value of the evaporating cylinder;

Obtain the real-time working torque value of the stirring motor of the ice cream machine, and obtain the real-time forming degree ratio value of the ice cream in the evaporation cylinder according to the current working torque value;

The frequency of the output power supply is dynamically adjusted according to any one or a combination of the temperature monitoring value and the real-time forming degree ratio value, thereby adjusting the rotational speed of the stirring motor.

Another embodiment of the present invention further provides an ice cream machine controller, including a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the following steps: The steps of the method for controlling the rotational speed of a stirring motor of an ice cream maker based on temperature and molding degree described in any one of the above or the control method for an ice cream maker according to any one of the above embodiments.

Compared with the prior art, the present invention has the following remarkable effects:

The invention determines the working state of the ice cream machine by acquiring the temperature value signal of the ice cream material inside the ice cream machine, the torque signal of the stirring motor, and the change of the signal, corresponding to the different working states of the ice cream machine, and adjusting the output power frequency through the frequency converter, so as to accurately The speed of the stirring motor is controlled, the energy consumption of the stirring motor is reduced, and the working noise is reduced.

By the method of the invention, when the normal temperature liquid ice cream material added in the initial stage of the ice cream material in the cylinder is evaporated, the stirring motor stirs at a high speed for a certain period of time, so as to fully stir the normal temperature liquid ice cream, increase the air content of the ice cream material, and improve the puffing of the ice cream product. When the liquid ice cream material at room temperature gradually cools down and has not solidified, the stirring motor can run at a lower speed to save electricity and reduce working noise; when the ice cream material in the evaporation cylinder begins to solidify, the stirring motor can run at a medium speed to minimize Save electricity and ensure the stirring and cutting effect of the agitator in the ice cream material in the evaporation cylinder; when the ice cream material in the evaporation cylinder gradually changes from semi-fixed to full solid state, the stirring motor runs at the normal rated speed to achieve better cutting Effect. Setting four or more temperature ranges can achieve more precise control, improve the puffing rate of ice cream, ensure the cutting effect, and reduce energy consumption as much as possible.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

1 is a schematic diagram of a module of an ice cream machine provided by one of the embodiments of the present invention;

Fig. 2 is the module schematic diagram of the control system of the ice cream machine in Fig. 1;

3 is a schematic flowchart of a control method of an ice cream machine provided by one of the embodiments of the present invention;

FIG. 4 is a schematic diagram of a module of an ice cream machine controller according to an embodiment of the present invention.

Detailed ways

The content of the present invention will be described in detail below through a preferred embodiment.

A method for controlling the rotational speed of an ice cream machine stirring motor based on temperature and molding degree, the ice cream machine comprises an evaporation cylinder, a stirrer and a stirring motor, the agitator is located in the evaporation cylinder for stirring ice cream, and the stirring motor Used to drive the agitator to rotate.

The temperature monitoring module is used to monitor the temperature of the ice cream material in the evaporating cylinder or the temperature value of the return air of the evaporating cylinder, and transmit the temperature monitoring value to the main controller; the frequency converter obtains the real-time operation of the stirring motor Torque value, and transmit the monitored working torque value to the main controller, the main controller is preset with the empirical relationship between the real-time working torque value of the inverter and the real-time forming degree proportional value of the ice cream under different working frequencies , according to the empirical relationship of the current working frequency of the frequency converter to obtain the real-time forming degree ratio value of the ice cream in the evaporation cylinder, corresponding to the working condition of the ice cream machine, the main controller according to the temperature monitoring value, the real-time forming degree Either one or a combination of the two proportional values dynamically adjusts the output power frequency of the frequency converter, thereby adjusting the rotational speed of the stirring motor.

After the operating frequency of the frequency converter is adjusted, it takes a period of time before the rotational speed becomes stable. In this embodiment, the frequency converter adopts the frequency converter with the function of detecting the torque of the stirring motor in the prior art. Working torque value. In addition, under different working frequencies of the inverter, the corresponding initial working torque value is set. Combined with the characteristics of the ice cream machine, the real-time working torque value, initial working torque value and the working frequency of the inverter under different working gears can be obtained through experiments and other means. Relational expression, and then obtain the real-time forming degree ratio value of ice cream.

Temperature Control Conditions:

3) The temperature monitoring value is within the set temperature range A3, and the output power frequency of the frequency converter is adjusted to be C3% of the rated grid frequency,

Forming degree control conditions:

Each working gear of the ice cream machine is preset with a corresponding initial forming degree ratio value, and so on, and each working gear is set to j forming degree ratio difference value B1 ~ Bj, corresponding to the interval setting of each forming degree ratio value The output power frequency of the inverter is CCj% of the rated grid frequency, where j is a positive integer, B1~Bj gradually increases, and CC1~CCj gradually increases;

The priority levels of the temperature control conditions and the forming degree control conditions are preset according to the working conditions of the ice cream machine or customer requirements, and the temperature control conditions or forming degree control conditions corresponding to the current working conditions are selected to adjust the output power frequency of the inverter .

In this embodiment, i=4 in the temperature control conditions, wherein A1≥15°C, 15°C>A2≥5°C, 5°C>A3≥-5°C, -5°C>A4≥-28°C; C1～ The corresponding values of C4 are C1=40, C2=60, C3=80, and C4=100.

This embodiment also adds a post-boot judgment condition. If the temperature monitoring value is greater than the set value Q of the control system when the power is turned on, the output power frequency of the inverter is adjusted to be D% of the rated grid frequency and runs for a period of time T. .

For reference, when the temperature monitoring value is greater than the set value of the control system Q=10°C, adjust the output power frequency of the inverter to D=180% of the rated grid frequency, that is, 90Hz for a period of time T=30S . The judgment condition has the following functions: when the temperature value in the evaporation cylinder is high when the machine is turned on, if the ice cream machine needs to be cooled, within the set working time T, the speed of the stirring motor is made higher than the normal speed, so that the ice cream material can be fully expanded. If the ice cream machine is not sold automatically, you can also set a specific control key, and enter the high-speed stirring through manual operation after starting to improve the puffing effect of the liquid ice cream material.

The values of the above parameters of the present invention are all set according to the ice cream machine, the ice cream material, and the use area combined with the test results, and are all adjustable parameter values.

Referring to FIG. 1 , the ice cream maker 100 provided in this embodiment includes an evaporation cylinder 110 , a stirrer 120 , a stirring motor 130 and a control system 200 . The functions of the evaporating cylinder 110, the stirrer 120, and the stirring motor 130 have been described in the above embodiments, and will not be repeated here.

Referring to FIG. 2 together, another embodiment of the present invention further provides an ice cream machine control system 200 . The ice cream machine control system 200 includes a temperature monitoring module 210 , a frequency converter 220 and a main controller 230 .

The temperature monitoring module 210 is used to monitor the temperature of the ice cream material in the evaporating cylinder 110 of the ice cream machine or the return air temperature value of the evaporating cylinder;

The frequency converter 220 obtains the real-time working torque value of the stirring motor 130;

The main controller 230 obtains the real-time forming degree ratio value of the ice cream in the evaporation cylinder 110 according to the current working torque value of the frequency converter 220, corresponding to the working condition of the ice cream machine, and the main controller 230 obtains the value according to the temperature monitoring value. . Any one or a combination of the two items of real-time forming degree ratio value dynamically adjusts the output power frequency of the frequency converter 220 , and then adjusts the rotational speed of the stirring motor 130 .

In one embodiment, the main controller 230 is set with the following temperature control conditions:

1) The temperature monitoring value is within the set temperature range A1, and the output power frequency of the inverter 220 is adjusted to be C1% of the rated grid frequency,

2) The temperature monitoring value is within the set temperature range A2, and the output power frequency of the inverter 220 is adjusted to be C2% of the rated grid frequency,

3) The temperature monitoring value is within the set temperature range A3, and the output power frequency of the frequency converter 220 is adjusted to be C3% of the rated grid frequency,

By analogy, set i continuous temperature ranges A1-Ai with the temperature gradually decreasing, and set the output power frequency of the inverter 220 to be Ci% of the rated grid frequency corresponding to each temperature range Ai, where i is a positive integer, C1-Ci gradually increase.

In one embodiment, the main controller 230 is set with the following molding degree control conditions:

1) The real-time forming degree proportional value≤initial forming degree proportional value+B1%, adjust the output power frequency of the inverter 220 to be CC1% of the rated grid frequency,

2) Initial formability ratio value+B1%<the real-time formability ratio value≤initial formability ratio value+B2%, adjust the output power frequency of the inverter 220 to be CC2% of the rated grid frequency,

3) Initial formability ratio value+B2%<the real-time formability ratio value≤initial formability ratio value+B3%, adjust the output power frequency of the inverter 220 to be CC3% of the rated grid frequency,

The priority level of the temperature control condition and the forming degree control condition is set according to the working condition of the ice cream machine, and the output power frequency of the inverter 220 is adjusted by selecting the temperature control condition or forming degree control condition corresponding to the current working condition.

Another embodiment of the present invention also provides an ice cream maker 100, comprising:

Evaporating cylinder 110;

a stirrer 120, the agitator 120 is located in the evaporation cylinder 110 for stirring the ice cream;

a stirring motor 130, the stirring motor 130 is used to drive the agitator 120 to rotate; and

The ice cream maker control system 200 according to any one of the above embodiments.

Referring to FIG. 3, another embodiment of the present invention also provides a control method for an ice cream machine, comprising the following steps:

Referring to FIG. 4 , an embodiment of the present invention further provides an ice cream machine controller 300 , including a memory 320 and a processor 310 , the memory 320 stores a computer program, and the computer program is controlled by the processor 310 When executed, the processor 310 is caused to execute the steps of the method for controlling the rotational speed of the stirring motor of the ice cream maker or the method for controlling the ice cream maker based on the temperature and the degree of molding described in any one of the above embodiments.

One of the embodiments of the present invention further provides a computer-readable storage medium on which a computer program is stored, and the computer program is executed by a processor to control ice cream based on temperature and degree of molding as described in any one of the above embodiments The method of stirring the motor speed of the machine or the steps of the control method of the ice cream machine.

The above-mentioned embodiments of the present invention are not intended to limit the protection scope of the present invention, and the embodiments of the present invention are not limited thereto. All of the above-mentioned contents of the present invention, in accordance with common technical knowledge and conventional means in the field, do not depart from the present invention. Under the premise of the above-mentioned basic technical idea, other various modifications, replacements or changes made to the above-mentioned structure of the present invention shall all fall within the protection scope of the present invention.

Claims

A method for controlling the rotational speed of an ice cream machine stirring motor based on temperature and molding degree, the ice cream machine comprises an evaporation cylinder, a stirrer and a stirring motor, the agitator is located in the evaporation cylinder for stirring ice cream, and the stirring motor For driving the agitator to rotate; it is characterized in that,

The ice cream machine also includes a control system, the control system includes a main controller, a temperature monitoring module and a frequency converter, the frequency converter is connected to the stirring motor for adjusting the input frequency of the stirring motor,

The temperature monitoring module is used to monitor the temperature of the ice cream material in the evaporating cylinder or the return air temperature value of the evaporating cylinder, and transmit the temperature monitoring value to the main controller, and the frequency converter obtains the real-time operation of the stirring motor. torque value, and transmit the monitored working torque value to the main controller, and the main controller obtains the real-time forming degree proportional value of the ice cream in the evaporation cylinder according to the current working torque value of the inverter, corresponding to the According to the working conditions of the ice cream machine, the main controller dynamically adjusts the output power frequency of the frequency converter according to any one or a combination of the temperature monitoring value and the real-time forming degree ratio value, and then adjusts the stirring The speed of the motor.
The method for controlling the rotational speed of an ice cream maker stirring motor based on temperature and molding degree according to claim 1, wherein the main controller is provided with the following temperature control conditions and molding degree control conditions,

Temperature Control Conditions:

1) The temperature monitoring value is within the set temperature range A1, and the output power frequency of the inverter is adjusted to be C1% of the rated grid frequency,

2) The temperature monitoring value is within the set temperature range A2, and the output power frequency of the inverter is adjusted to be C2% of the rated grid frequency,

3) The temperature monitoring value is within the set temperature range A3, and the output power frequency of the inverter is adjusted to be C3% of the rated grid frequency,

By analogy, set i continuous temperature ranges A1~Ai with gradually decreasing temperature, and set the output power frequency of the inverter to be Ci% of the rated grid frequency corresponding to each temperature range Ai, where i is a positive integer, C1~Ci gradually increase;

Forming degree control conditions:

1) The real-time forming degree proportional value≤initial forming degree proportional value+B1%, adjust the output power frequency of the inverter to be CC1% of the rated grid frequency,

2) Initial molding degree proportional value + B1% < the real-time molding degree proportional value ≤ initial molding degree proportional value + B2%, adjust the output power frequency of the inverter to CC2% of the rated grid frequency,

3) Initial molding degree proportional value + B2% < the real-time molding degree proportional value≤initial molding degree proportional value + B3%, adjust the output power frequency of the inverter to CC3% of the rated grid frequency,

Each working gear of the ice cream machine is preset with a corresponding initial forming degree ratio value, and so on, each working gear is set with j forming degree ratio difference values B1~Bj, and the interval corresponding to each forming degree ratio value is set. The output power frequency of the fixed inverter is CCj% of the rated grid frequency, where j is a positive integer, B1~Bj gradually increases, and CC1~CCj gradually increases;

The priority level of the temperature control condition and the forming degree control condition is set according to the working condition of the ice cream machine, and the output power frequency of the inverter is adjusted by selecting the temperature control condition or forming degree control condition corresponding to the current working condition.
The method for controlling the rotational speed of an ice cream machine stirring motor based on temperature and molding degree according to claim 2, wherein i=4 in the temperature control conditions, wherein A1≥15°C, 15°C>A2≥5°C, 5°C ℃>A3≥-5℃, -5℃>A4≥-28℃; the corresponding values of C1～C4 are C1=40, C2=60, C3=80, C4=100.
The method for controlling the rotational speed of an ice cream machine stirring motor based on temperature and molding degree according to claim 2, characterized in that, in the molding degree control condition, j=4, wherein B1∈[1,5], B2∈(5, 10], B3∈(10, 20], B4∈(20, 30]; the corresponding values of CC1 to CC4 are CC1=40, CC2=60, CC3=80, and CC4=100.
The method for controlling the rotational speed of the stirring motor of an ice cream maker based on temperature and molding degree according to any one of claims 2 to 4, characterized in that a post-boot judgment condition is added, and if the temperature monitoring value is greater than the control If the system set value Q, then adjust the output power frequency of the inverter to D% of the rated grid frequency and run for a period of time T.
The method for controlling the rotational speed of a stirring motor of an ice cream maker based on temperature and molding degree according to claim 5, characterized in that, Q=10°C, D=180, T=30S.
A control system for an ice cream machine, comprising:

a temperature monitoring module, which is used to monitor the temperature of the ice cream material in the evaporating cylinder of the ice cream machine or the temperature value of the return air of the evaporating cylinder;

a frequency converter, wherein the frequency converter obtains the real-time working torque value of the stirring motor;

The main controller, the main controller obtains the real-time forming degree ratio value of the ice cream in the evaporation cylinder according to the current working torque value of the frequency converter, corresponding to the working condition of the ice cream machine, and the main controller according to the temperature monitoring value . Any one or a combination of the two items of real-time forming degree ratio value dynamically adjusts the output power frequency of the frequency converter, and then adjusts the rotational speed of the stirring motor.
The ice cream machine control system according to claim 7, wherein,

The main controller is provided with the following temperature control conditions:

1) The temperature monitoring value is within the set temperature range A1, and the output power frequency of the inverter is adjusted to be C1% of the rated grid frequency,

2) The temperature monitoring value is within the set temperature range A2, and the output power frequency of the inverter is adjusted to be C2% of the rated grid frequency,

3) The temperature monitoring value is within the set temperature range A3, and the output power frequency of the inverter is adjusted to be C3% of the rated grid frequency,

By analogy, set i continuous temperature ranges A1~Ai with gradually decreasing temperature, and set the output power frequency of the inverter to be Ci% of the rated grid frequency corresponding to each temperature range Ai, where i is a positive integer, C1~Ci gradually increase.
The ice cream machine control system according to claim 8, wherein,

In the temperature control conditions i=4, where A1≥15℃, 15℃>A2≥5℃, 5℃>A3≥-5℃, -5℃>A4≥-28℃; the corresponding values of C1～C4 are C1=40, C2=60, C3=80, C4=100.
The ice cream machine control system according to claim 7, wherein,

The main controller is provided with the following molding degree control conditions:

1) The real-time forming degree proportional value≤initial forming degree proportional value+B1%, adjust the output power frequency of the inverter to be CC1% of the rated grid frequency,

2) Initial molding degree proportional value + B1% < the real-time molding degree proportional value ≤ initial molding degree proportional value + B2%, adjust the output power frequency of the inverter to CC2% of the rated grid frequency,

3) Initial molding degree proportional value + B2% < the real-time molding degree proportional value≤initial molding degree proportional value + B3%, adjust the output power frequency of the inverter to CC3% of the rated grid frequency,

Each working gear of the ice cream machine is preset with a corresponding initial forming degree ratio value, and so on, each working gear is set with j forming degree ratio difference values B1~Bj, and the interval corresponding to each forming degree ratio value is set. The output power frequency of the fixed inverter is CCj% of the rated grid frequency, where j is a positive integer, B1~Bj gradually increases, and CC1~CCj gradually increases;

The priority level of the temperature control condition and the forming degree control condition is set according to the working condition of the ice cream machine, and the output power frequency of the inverter is adjusted by selecting the temperature control condition or forming degree control condition corresponding to the current working condition.
The ice cream machine control system according to claim 10, wherein,

In the forming degree control condition, j=4, where B1∈[1,5], B2∈(5,10], B3∈(10,20], B4∈(20,30]; CC1～CC4 correspond to the values are CC1=40, CC2=60, CC3=80, CC4=100.
An ice cream machine, characterized in that, comprising:

Evaporating cylinder;

a stirrer, which is located in the evaporating cylinder for stirring ice cream;

a stirring motor, the stirring motor is used to drive the agitator to rotate; and

The ice cream maker control system according to any one of claims 7-11.
A control method for an ice cream machine, comprising the following steps:

Monitor the temperature of the ice cream material in the evaporating cylinder of the ice cream machine or the return air temperature value of the evaporating cylinder;

Obtain the real-time working torque value of the stirring motor of the ice cream machine, and obtain the real-time forming degree ratio value of the ice cream in the evaporation cylinder according to the current working torque value;

The frequency of the output power supply is dynamically adjusted according to any one or a combination of the temperature monitoring value and the real-time forming degree ratio value, thereby adjusting the rotational speed of the stirring motor.
An ice cream machine controller, comprising a memory and a processor, wherein a computer program is stored in the memory, characterized in that, when the computer program is executed by the processor, the processor is made to execute the steps of claims 1-6 Any one of the methods for controlling the rotational speed of a stirring motor of an ice cream maker based on temperature and molding degree or the steps of the control method for an ice cream maker as claimed in claim 13 .