WO2022205903A1

WO2022205903A1 - Method and system for controlling discharge speed of ice cream machine on basis of temperature and shaping degree

Info

Publication number: WO2022205903A1
Application number: PCT/CN2021/128542
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: CN113142375A; CN114794295A

Abstract

An ice cream machine capable of controlling the discharge speed thereof on the basis of a temperature and a shaping degree, and a control method thereof. The ice cream machine comprises an evaporation tank, a stirrer, a stirring electric motor, and a control system. The control system comprises a main controller, a temperature monitoring module, a frequency converter, and a discharge switch. The frequency converter is used to adjust an input frequency of the stirring electric motor. The temperature monitoring module is used to monitor the temperature of ice cream materials in the evaporation tank or the return air temperature value of the evaporation tank and transfer same to the main controller. The frequency converter obtains a real-time operation torque value of the operation of the stirring electric motor and transfers the real-time operation torque value to the main controller, so as to obtain a proportional value of the real-time shaping degree of ice cream. The discharge switch is used to check the operating state of a discharge valve. The main controller adjusts the input frequency of the stirring electric motor according to the operating state of the discharge valve in combination with the monitored temperature value or the proportional value of the real-time shaping degree. By means of the method, the rotation speed of a stirring electric motor under a discharge condition of an ice cream machine is accurately controlled, such that the discharge capacity of the ice cream machine can be improved, and the energy consumption thereof can be reduced.

Description

Method and system for controlling the discharge speed of ice cream machine 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 discharge speed 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.

In addition, during the discharge process of the ice cream machine, with the increase of the discharge amount and the replenishment of new materials, the forming degree of the ice cream in the evaporation cylinder will also change. When the traditional ice cream machine continuously discharges the material, the quality of the ice cream produced later will deteriorate. It needs to be re-refrigerated before discharging, which prolongs the waiting time.

To sum up, in the traditional ice cream machine, the speed control of the stirrer is unreasonable, which causes energy waste, increases the noise of the ice cream machine, and the number of ice cream that can be made during continuous discharge is small.

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 present invention provides a method for controlling the discharging speed of an ice cream machine based on temperature and molding degree. The purpose is to precisely control the rotational speed of a stirring motor through a frequency converter, improve the discharging capacity of the ice cream machine, ensure the stability of the discharging amount of the ice cream machine, and ensure the stability of the ice cream machine. Reduce the energy consumption and operating noise of the ice cream machine.

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

The ice cream maker includes an evaporation cylinder, a stirrer and a stirring motor, the agitator is located in the evaporation cylinder and is used for stirring ice cream, the stirring motor is used to drive the agitator to rotate, and the ice cream maker further includes a control The control system includes a main controller, a temperature monitoring module, a frequency converter and a discharge switch, and the frequency converter is connected with the stirring motor to adjust the input frequency of the stirring motor, thereby controlling the speed of the motor ;

The temperature monitoring module is used to monitor the temperature of the ice cream material in the evaporation cylinder or the return air temperature value of the evaporation cylinder, and transmit the temperature monitoring value to the main controller, and the frequency converter obtains the real-time operation of the stirring motor. The working torque value is transmitted 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 real-time working torque value, and the discharge switch is used to detect the discharge valve. working state, the main controller adjusts the input frequency of the stirring motor according to the working state of the discharge valve in combination with the temperature monitoring value or the real-time forming degree proportional value.

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 torque value, that is, the empirical relationship between the real-time working torque value and the real-time forming degree of the ice cream, and then obtain the real-time forming degree of the ice cream. In the present invention, the forming degree of the ice cream is expressed as a proportional value, which is called is the formability ratio value. The main controller can preset the empirical relationship between the inverter's real-time working torque value and the ice cream's real-time forming degree proportional value at different working frequencies, and obtain the real-time ice cream in the evaporating cylinder according to the empirical relationship of the inverter's current working frequency. Forming degree proportional value, the main controller controls the output frequency of the inverter under different discharging conditions of the ice cream machine according to the temperature monitoring value and the real-time forming degree proportional value, and changes the discharging speed by adjusting the rotational speed of the stirring motor.

The present invention has the following preferred designs:

The following judgment conditions are added: the main controller monitors the discharge switch signal of the ice cream machine to judge the opening and closing status of the discharge valve, when the discharge valve is opened, and the temperature monitoring value ≤ W1 or/and the real-time molding degree ratio value ≥ Q1, adjust the input frequency of the stirring motor to A% of the rated input frequency, A<100, and reduce the rotational speed of the stirring motor. Among them, A=60～99, W1, Q1 are the parameters preset by the system, the value range is as follows: W1=-5℃～-20℃, Q1=85%～100%. The function of this judgment condition is as follows: when the temperature monitoring value is less than or equal to W1 or/and the real-time forming degree ratio value is greater than or equal to Q1, it means that the temperature of the ice cream in the evaporation cylinder is low and the degree of forming is high. At the rated input frequency, the thrust of the agitator is too large, so the speed of the stirring motor is limited to avoid the discharge speed being too fast and to ensure the stable discharge.

When there are many consumers, the ice cream machine needs to discharge continuously at a high frequency. After multiple discharges, the harder ice cream at the front end of the evaporating cylinder is continuously pushed out, and the hardness of the ice cream in the evaporating cylinder decreases, which will lead to insufficient thrust of the mixer , the discharge speed of the ice cream machine gradually decreases at the original speed of the stirring motor. Therefore, the present invention also adds the following judging conditions: the number of discharges of the ice cream machine within a preset time T1 is monitored by the main controller, that is, the number of times the discharge valve is opened, when the number of discharges within the preset time T1 is greater than the set When the fixed value N, if the material continues to be discharged and the temperature monitoring value is less than or equal to W2 or/and the real-time forming degree ratio value is greater than or equal to Q2, adjust the input frequency of the stirring motor to B% of the rated input frequency, B>100, through the The frequency converter increases the input frequency of the stirring motor and increases the rotational speed of the stirring motor, so that the thrust of the agitator is increased and the material is discharged, so as to ensure the stability of the discharge amount.

Among them, T1, W2, N, Q2, and B are all parameters set by the system. =102～190, N is determined by the size of a single ice cream and the characteristics of the ice cream machine, and multiple N values can be set.

In the same way, when the single discharge time is long, it will also lead to insufficient thrust of the agitator, so the present invention also adds the following judgment conditions: monitoring the time when the ice cream machine discharge valve is opened once by the main controller, when Continue to discharge when the single opening time of the discharge valve is greater than the preset time value T2, and the temperature monitoring value is less than or equal to W3 or/and the real-time molding degree ratio value is greater than or equal to Q3, and the input frequency of the stirring motor is adjusted to C of the rated input frequency. %, C>100, increase the input frequency of the stirring motor through the inverter to increase the rotational speed of the stirring motor, wherein T2=1.5～15 seconds, W3=-2℃～-15℃, Q3=40 %～95%; C=102～190.

If the ice cream in the evaporating cylinder has reached the discharge forming degree value, but has not been discharged, the stirring motor works according to the normal working frequency to increase the energy consumption. Therefore, the invention also adds the following judgment conditions: when it is monitored that the ice cream material in the evaporating cylinder reaches the set point After setting the ratio of dischargeable molding, it enters the standby state. During the standby period, the discharge valve has not been opened and when it enters the refrigeration cycle again, adjust the input frequency of the stirring motor to D% of the rated input frequency, D=20~99, reduce The rotational speed of the stirring motor.

A plurality of temperature sensors are arranged from the refrigerant inlet end to the refrigerant outlet end of the evaporating cylinder of the present invention.

As a feasible implementation manner, three temperature sensors are provided, which are respectively used to monitor the real-time temperature values of the refrigerant inlet end, the refrigerant outlet end and the intermediate positions of the two of the evaporating cylinders, wherein the refrigerant inlet end corresponds to The outlet end of the evaporating cylinder and the outlet end of the refrigerant correspond to the feeding end of the evaporating cylinder. The temperature monitoring value is ≤ discharge molding temperature value ±K2, K2 < K1, if the discharge valve is opened, adjust the input frequency of the stirring motor to the rated input frequency, that is, adjust the speed of the stirring motor to the rated speed. The temperature monitoring value belongs to this case, which proves that new ice cream material enters the feed end of the evaporation cylinder, and the temperature of the feed end rises, but the ice cream at the discharge end and the middle position of the evaporation cylinder is still a formable ice cream that can be discharged. The stirring motor Constant discharge can be achieved at rated input frequency.

For example: the molding temperature value refers to the temperature value when the ice cream reached a certain molding last time. The temperature value can be the temperature value of the refrigerant outlet end, the middle position or the refrigerant inlet end during the last molding, or the temperature value of any point in the evaporation cylinder. average value. For example, when the molding degree reaches 85%, the intermediate temperature value is -15 degrees, K1 is set to +5 degrees, and K2 is set to +2 degrees, then when the refrigerant outlet temperature value is ≥-15+5, that is, ≥-10 When the temperature value of the refrigerant inlet end and the middle position is ≦-15±2, that is, ≦-17～-13 degrees, that is, when the temperature monitoring value of the refrigerant outlet end is higher than the temperature monitoring value of the refrigerant inlet end and the middle position Both are high, indicating that the feeding port of the evaporating cylinder starts to feed, but the ice cream at the discharge end and the middle position is still the formed ice cream that can be discharged. When the discharge switch is turned on to discharge, that is, the stirring motor is at rated input. The material can be discharged at a constant frequency.

When the temperature monitoring value of the refrigerant outlet end and the middle position is ≥ the discharge forming temperature value + K3, and the temperature monitoring value of the refrigerant inlet end is ≦ the discharge forming temperature value ± K4, K4 < K3, if the discharge switch is turned on, then Adjust the input frequency of the stirring motor to E% of the rated input frequency, E>100. The temperature monitoring value belongs to this case, which proves that there is new ice cream material entering the feeding end of the evaporation cylinder, and the temperature between the feeding end and the intermediate position of the evaporation cylinder has begun to rise, and only the discharging end of the evaporation cylinder is the shape ice cream that can be discharged. Therefore, the present invention enhances the thrust of the agitator by increasing the rotational speed of the stirring motor to above the rated rotational speed, which is conducive to the completion of discharging, thereby increasing the number of discharging materials when the ice cream machine frequently discharges materials, and reducing the waiting time of users or customers.

For example: the molding temperature value refers to the temperature value when the ice cream reached a certain molding last time. The temperature value can be the temperature value of the refrigerant outlet end, the middle position or the refrigerant inlet end during the last molding, or the temperature value of any point in the evaporation cylinder. average value. For example, when the temperature monitoring value of the refrigerant outlet end and the middle position is ≥ the discharge molding temperature value + K3, and the K3 setting value is +10 degrees, that is, the temperature of the refrigerant outlet end and the middle position is ≥ -15 + 10, which is ≥-5 degrees, and the temperature monitoring value of the refrigerant inlet end is ≦the discharge molding temperature value ±K4, K4 is set to 5 degrees, that is, the temperature of the refrigerant inlet end is ≦-15±5, which is -20～- At 10 degrees, that is, the temperature monitoring value at the refrigerant outlet end and the temperature monitoring value at the middle position are higher than the temperature monitoring value at the refrigerant inlet end, indicating that more new materials have entered the inlet of the evaporating cylinder, and the outlet of the evaporating cylinder has entered more new materials. The amount of formed ice cream at the material end and the middle position is small. When the discharge switch is turned on to discharge, it is necessary to increase the speed of the stirring motor, and use a larger motor speed to push the internal ice cream to discharge, so as to achieve a more constant discharge.

When the ice cream machine is in the cleaning state, and the temperature monitoring value > W4 or/and the real-time forming degree ratio value < Q4, the main controller monitors the opening of the discharge valve, and adjusts the input frequency of the stirring motor to the rated input frequency. E%, E>100, increase the input frequency of the stirring motor through the frequency converter to increase the rotational speed of the stirring motor, where W4=30℃～-5℃, Q4=70; E=110～180, with Easy to clean and discharge.

One of the embodiments of the present invention 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, the frequency converter obtains the real-time working torque value of the operation of the stirring motor of the ice cream machine;

A discharge switch, which is used to detect the working state of the discharge valve of the ice cream machine; and

The main controller obtains the real-time forming degree proportional value of the ice cream in the evaporation cylinder according to the real-time working torque value, and adjusts the real-time forming degree proportional value according to the working state of the discharge valve in combination with the temperature monitoring value or the real-time forming degree proportional value. the input frequency of the stirring motor.

One of the embodiments of the present invention provides an ice cream maker, comprising:

Evaporating cylinder;

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

a stirring motor, which is used to drive the stirrer to rotate;

discharge valve; and

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

One of the embodiments of the present invention provides a control method of an ice cream machine,

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;

Get the working status of the discharge valve of the ice cream machine; and

The input frequency of the stirring motor is adjusted according to the working state of the discharge valve combined with the temperature monitoring value or the real-time forming degree proportional value.

One embodiment of the present invention provides an ice cream machine controller, comprising a memory and a processor, wherein a computer program is stored in the memory, and characterized in that, when the computer program is executed by the processor, the processing The device executes the steps of the method for controlling the discharging speed of the ice cream machine based on the temperature and the degree of molding described in any one of the above embodiments or the steps of the control method for the ice cream machine according to any one of the above embodiments.

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

The invention aims at different ice cream discharge conditions such as long-term undischarged, intermittent discharge, continuous multiple discharge, single long-time discharge, etc., and studies the relationship between the discharge speed and the ice cream machine under different discharge conditions. The relationship between the real-time temperature and real-time forming degree of ice cream in the evaporating cylinder, according to the real-time temperature monitoring value and the real-time forming degree ratio value, the frequency converter provides the corresponding input frequency for the stirring motor when discharging, and the speed of the stirring motor can be precisely controlled to Realize more stable discharge control.

The invention can reduce the rotating speed of the stirring motor and reduce the working energy consumption and noise when the material is not discharged for a long time; when the material is intermittently discharged, the rotating speed of the stirring motor can be separately controlled according to the temperature value or the timely forming degree, so as to achieve a more accurate Discharge control ability; when continuous multiple discharges or single long-term discharges, the speed of the stirring motor can be increased to improve the discharge capacity of the ice cream machine. Through this technology, the material output can be guaranteed to be better and more constant, and the output capacity of the ice cream machine with the same configuration can be enhanced, which can reduce the waiting time of users or customers, reduce energy consumption and noise, and improve user benefits.

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 discharge speed of an ice cream machine 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 ice cream machine also includes a control system, the control system includes a main controller, a temperature monitoring module, a frequency converter and a discharge switch, and the frequency converter is connected to the stirring motor It is used to adjust the input frequency of the stirring motor, so as to control the speed of the motor;

In this embodiment, the main controller 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 evaporation cylinder, and the real-time working torque value and the real-time ice cream can be obtained through the real-time working torque value. The empirical relational expression of the degree of forming can obtain the real-time forming degree of ice cream, and the degree of forming is expressed in the form of a proportional value, which is called the proportional value of forming degree. The main controller can preset the empirical relationship between the inverter's real-time working torque value and the ice cream's real-time forming degree proportional value at different working frequencies, and obtain the real-time ice cream in the evaporating cylinder according to the empirical relationship of the inverter's current working frequency. Forming degree proportional value, the main controller controls the output frequency of the inverter under different discharging conditions of the ice cream machine according to the temperature monitoring value and the real-time forming degree proportional value, and changes the discharging speed by adjusting the rotational speed of the stirring motor.

In this embodiment, the stirring motor can be a wide-band three-phase asynchronous motor. When the working input frequency of the motor changes, the working voltage of the motor also changes with the input frequency. The frequency converter adopts the frequency converter with the function of monitoring the torque of the stirring motor. This is The content of the prior art is not repeated here.

As a preferred embodiment:

The main controller monitors the discharge switch signal of the ice cream machine to determine the opening and closing status of the discharge valve. When the discharge valve is opened, and the temperature monitoring value is less than or equal to W1 or/and the real-time molding degree ratio value is greater than or equal to Q1, adjust the The input frequency of the stirring motor is A% of the rated input frequency, A<100, and the rotation speed of the stirring motor is reduced. Among them, A=60～99, W1, Q1 are the parameters preset by the system, the value range is as follows: W1=-5℃～-20℃, Q1=85%～100%.

In this embodiment, the rated input frequency of the stirring motor is 50Hz, W1 is set to -10°C, and Q1 is set to 95%. When the temperature monitoring value is less than or equal to -10°C or the molding degree ratio is greater than or equal to 95%, the material is discharged. , then adjust the input frequency of the stirring motor to A=80% of the rated input frequency, that is, 40Hz.

When there are many consumers, the ice cream machine needs to discharge continuously at a high frequency. After multiple discharges, the harder ice cream at the front end of the evaporating cylinder is continuously pushed out, and the hardness of the ice cream in the evaporating cylinder decreases, which will lead to insufficient thrust of the mixer , the discharge speed of the ice cream machine gradually decreases at the original speed of the stirring motor. In this embodiment, the main controller monitors the number of discharges of the ice cream machine within a preset time T1, that is, the number of times the discharge valve is opened. When the number of discharges within the preset time T1 is greater than the set value N, if When the material continues to be discharged and the temperature monitoring value is less than or equal to W2 or/and the real-time molding degree ratio value is greater than or equal to Q2, adjust the input frequency of the stirring motor to B% of the rated input frequency, B>100, and increase the The input frequency of the stirring motor increases the rotational speed of the stirring motor, so that the thrust of the agitator is increased and the material is discharged, so as to ensure the stability of the discharge amount.

In this embodiment, the number of materials discharged from the ice cream machine within a preset time T1=60S is monitored, and when the number of materials discharged within a preset time of 60S is greater than the preset value N=6, the input frequency of the stirring motor is adjusted to 120% of the rated input frequency, that is, 60Hz; when the number of materials discharged within the preset time of 60S is greater than the preset value N=8, adjust the input frequency of the stirring motor to 140% of the rated frequency, that is, 70Hz; When the number of materials discharged within 60S is set to be greater than the preset value N=10, the input frequency of the stirring motor is adjusted to 160% of the rated frequency, that is, 80Hz.

When the single discharge time is long, it will also lead to insufficient thrust of the discharge mixer, so the present invention also adds the following judgment conditions: the main controller is used to monitor the time that the discharge valve of the ice cream machine is opened once, when the discharge valve is opened Continue to discharge when the time of a single opening is greater than the preset time value T2, and the temperature monitoring value is less than or equal to W3 or/and the real-time forming degree ratio value is greater than or equal to Q3, and the input frequency of the stirring motor is adjusted to C% of the rated input frequency, C >100, increase the input frequency of the stirring motor through the frequency converter to increase the rotational speed of the stirring motor, wherein T2=1.5～15 seconds, W3=-2℃～-15℃, Q3=40%～95 %; C=102～190.

As the preferred parameter of this embodiment: monitor the time when the discharge switch of the ice cream machine is turned on a single time, and when the time when the discharge switch is turned on a single time is greater than the preset time value T2=3S, adjust the input frequency of the stirring motor to the rated input frequency 120% of the frequency, ie 60 Hz, increases the rotational speed of the stirring motor.

As the preferred parameter of this embodiment: when it is detected that the ice cream material in the evaporation cylinder reaches the set dischargeable molding ratio, it enters the standby state, and the discharge valve is not opened during the standby period and enters the refrigeration cycle again, adjust the stirring motor. The input frequency is to D=50% of the rated frequency, that is, 25Hz, and the speed of the stirring motor is reduced, thereby reducing energy consumption and noise.

In this embodiment, three temperature sensors are provided from the refrigerant inlet end to the refrigerant outlet end of the evaporating cylinder, which are respectively used to monitor the real-time temperature values of the refrigerant inlet end and the refrigerant outlet end of the evaporating cylinder and the intermediate positions between the two. , where the refrigerant inlet end corresponds to the discharge end of the evaporating cylinder, and the refrigerant outlet end corresponds to the feeding end of the evaporating cylinder. 5 ℃, and the temperature monitoring value of the refrigerant inlet end and the middle position is ±K2, K2 < K1, K2 is preferably 2 ℃ in this example, if the discharge valve is opened, adjust the stirring motor. Input frequency to rated input frequency. The temperature monitoring value belongs to this case, which proves that new ice cream material enters the feed end of the evaporation cylinder, and the temperature of the feed end rises, but the ice cream at the discharge end and the middle position of the evaporation cylinder is still a formable ice cream that can be discharged. The stirring motor Constant discharge can be achieved at rated input frequency.

When the temperature monitoring value of the refrigerant outlet end and the middle position is greater than or equal to the discharge forming temperature value + K3, K3 is preferably 10 °C, and the temperature monitoring value of the refrigerant inlet end is the discharge forming temperature value ±K4, K4 < K3, in this example K4 is preferably 5°C. If the discharge valve is opened, the input frequency of the stirring motor is adjusted to 120% of the rated input frequency, that is, 60Hz. If the temperature monitoring value belongs to this situation, it proves that new ice cream material has entered the feed end of the evaporating cylinder, and the temperature between the feeding end and the middle position of the evaporating cylinder has begun to rise, and only a small part of the discharging end of the evaporating cylinder can be discharged. Therefore, the present invention enhances the thrust of the stirrer by increasing the rotational speed of the stirring motor to above the rated rotational speed, which is conducive to the completion of discharging, thereby improving the frequent discharging capacity of the ice cream machine, and increasing the thrust of the stirrer to increase the number of materials that can be discharged. Reduce user or customer wait time.

When the ice cream machine is in the cleaning state, the stirring motor works normally at the rated input frequency of 50Hz, if any one of the following is satisfied: the temperature monitoring value>W4 or/and the real-time molding degree ratio value<Q4, and the main controller monitors the output. When the material valve is opened, the water or residual ice cream in the evaporating cylinder needs to be discharged after cleaning, and the input frequency of the stirring motor is adjusted to E% of the rated input frequency, E>100, and the frequency converter is used to increase the The input frequency of the stirring motor increases the rotating speed of the stirring motor, wherein W4=30℃～-5℃, Q4=70; E=110～180, increasing the rotating speed of the stirring motor is beneficial to the water in the evaporation cylinder or the remaining ice cream Quick discharge.

The parameter values in this embodiment are all preset preferred parameter values according to the characteristics of the ice cream maker, the ice cream ingredients and the use area, and the setting parameters can be set and adjusted according to the actual application scenario. The adjustment method is realized by the programming software of the prior art.

Referring to FIG. 1 , the ice cream machine 100 provided in this embodiment includes an evaporation cylinder 110 , a stirrer 120 , a stirring motor 130 , a discharge valve 140 and a control system 200 . The functions of the evaporation cylinder 110 , the agitator 120 , the stirring motor 130 , and the discharge valve 140 have been described in the above embodiments, and will not be repeated here.

Referring to FIG. 2 together, one embodiment of the present invention 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 , a discharge switch 230 and a main controller 240 .

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 110;

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

The discharge switch 230 is used to detect the working state of the discharge valve 140 of the ice cream machine; and

The main controller 240 obtains the real-time forming degree ratio value of the ice cream in the evaporation cylinder 110 according to the real-time working torque value, and combines the temperature monitoring value or the real-time forming degree ratio according to the working state of the discharge valve 140 value to adjust the input frequency of the stirring motor 130.

One embodiment of the present invention provides an ice cream maker 100, including:

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;

Outlet valve 140; and

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

Get the working status of the discharge valve of the ice cream machine; and

Referring to FIG. 4, an embodiment of the present invention provides an ice cream machine controller 300, including a memory 320 and a processor 310, wherein a computer program is stored in the memory 320, wherein the computer program is described by the When the processor 310 is executed, the processor 310 is caused to execute the method for controlling the discharge speed of the ice cream machine based on the temperature and the degree of molding described in any of the above embodiments or the method of the ice cream machine described in any of the above embodiments. The steps of the control method.

The above-mentioned embodiments of the present invention are not intended to limit the scope of protection of the present invention, and the embodiments of the present invention are not limited thereto. According to the above-mentioned contents of the present invention, according to common technical knowledge and conventional means in the field, without departing from the present invention Under the premise of the above basic technical idea, other various modifications, replacements or changes made to the above structure of the present invention should all fall within the protection scope of the present invention.

Claims

A method for controlling the discharge speed of an ice cream machine 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, a frequency converter and a discharge switch, and the frequency converter is connected to the stirring motor for adjusting the input of the stirring motor frequency, thereby controlling the speed of the motor;

The temperature monitoring module is used to monitor the temperature of the ice cream material in the evaporation cylinder or the return air temperature value of the evaporation cylinder, and transmit the temperature monitoring value to the main controller, and the frequency converter obtains the real-time operation of the stirring motor. The working torque value is transmitted 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 real-time working torque value, and the discharge switch is used to detect the discharge valve. working state, the main controller adjusts the input frequency of the stirring motor according to the working state of the discharge valve in combination with the temperature monitoring value or the real-time forming degree proportional value.
The method for controlling the discharge speed of an ice cream machine based on temperature and degree of molding according to claim 1, wherein the method also adds the following judgment conditions: monitoring the discharge switch signal of the ice cream machine by the main controller to determine The opening and closing state of the feed valve, when the discharge valve is opened, and the temperature monitoring value is ≤ W1 or/and the real-time forming degree ratio value ≥ Q1, adjust the input frequency of the stirring motor to A% of the rated input frequency, A<100 , reduce the rotational speed of the stirring motor.
The method for controlling the discharge speed of an ice cream machine based on temperature and molding degree according to claim 2, characterized in that, W1=-5℃～-20℃, Q1=85%～100%; A=60～99.
The method for controlling the discharge speed of an ice cream machine based on temperature and molding degree according to claim 1, wherein the method further adds the following judgment condition: monitoring the ice cream machine within a preset time T1 by the main controller The number of discharged materials is the number of times the discharge valve is opened. When the number of discharged materials within the preset time T1 is greater than the set value N, if the material continues to be discharged and the temperature monitoring value is less than or equal to W2 or/and the real-time molding degree ratio value is greater than or equal to Q2 , adjust the input frequency of the stirring motor to B% of the rated input frequency, B>100, and increase the input frequency of the stirring motor through the frequency converter to increase the speed of the stirring motor.
The method for controlling the discharge speed of an ice cream machine based on temperature and molding degree according to claim 4, characterized in that, T1=10～60 seconds, W2=-2℃～-15℃, Q2=40%～95%, B=102～190.
The method for controlling the discharge speed of an ice cream machine based on temperature and degree of molding according to claim 1, wherein the method also adds the following judgment conditions: monitoring the discharge valve of the ice cream machine through the main controller once opened time, when the single opening time of the discharge valve is greater than the preset time value T2, continue to discharge, and the temperature monitoring value is less than or equal to W3 or/and the real-time molding degree ratio value is greater than or equal to Q3, adjust the input frequency of the stirring motor to the rated input C% of the frequency, C>100, increase the input frequency of the stirring motor through the frequency converter to increase the rotation speed of the stirring motor, wherein, T2=1.5～15 seconds, W3=-2℃～-15℃, Q3=40%～95%, C=102～190.
The method for controlling the discharge speed of an ice cream machine based on temperature and molding degree according to claim 1, wherein the method also adds the following judgment conditions: when the ice cream material in the evaporation cylinder is monitored to reach the set dischargeable molding After the proportion, it enters the standby state. During the standby period, the discharge valve has not been opened and enters the refrigeration cycle again. Adjust the input frequency of the stirring motor to D% of the rated input frequency, D=20~99, and reduce the speed of the stirring motor. .
The method for controlling the discharge speed of an ice cream machine based on temperature and molding degree according to claim 1, wherein a plurality of temperature sensors are provided from the refrigerant inlet end to the refrigerant outlet end of the evaporation cylinder.
The method for controlling the discharge speed of an ice cream machine based on temperature and molding degree according to claim 8, wherein three temperature sensors are provided, which are respectively used to monitor the refrigerant inlet end and refrigerant outlet of the evaporating cylinder. The real-time temperature value of the end and the intermediate position of the two, wherein the refrigerant inlet end corresponds to the discharge end of the evaporating cylinder, and the refrigerant outlet end corresponds to the feeding end of the evaporating cylinder,

When the temperature monitoring value of the refrigerant outlet is greater than or equal to the discharge forming temperature value + K1, and the temperature monitoring value of the refrigerant inlet end and the middle position is the discharge forming temperature value ±K2, K2 < K1, if the discharge valve is open, adjust the The input frequency of the stirring motor is adjusted to the rated input frequency, that is, the rotational speed of the stirring motor is adjusted to the rated rotational speed, wherein the rated rotational speed is the rotational speed of the stirring motor under the rated input frequency of the power grid,

When the temperature monitoring value of the refrigerant outlet end and the middle position is ≥ the discharge forming temperature value + K3, and the temperature monitoring value of the refrigerant inlet end is the discharge forming temperature value ± K4, K4 < K3, if the discharge valve is open, adjust the The input frequency of the stirring motor is E% of the rated input frequency, and E>100.
The method for controlling the discharge speed of an ice cream machine based on temperature and molding degree according to claim 1, wherein when the ice cream machine is in a cleaning state, the temperature monitoring value>W4 or/and the real-time molding ratio value<Q4, the When the main controller monitors the opening of the discharge valve, it adjusts the input frequency of the stirring motor to E% of the rated input frequency, E>100, and increases the input frequency of the stirring motor through the frequency converter to increase the stirring motor. The rotation speed, where W4=30℃～-5℃, Q4=70; E=110～180.
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, the frequency converter obtains the real-time working torque value of the operation of the stirring motor of the ice cream machine;

A discharge switch, which is used to detect the working state of the discharge valve of the ice cream machine; and

The main controller obtains the real-time forming degree proportional value of the ice cream in the evaporation cylinder according to the real-time working torque value, and adjusts the real-time forming degree proportional value according to the working state of the discharge valve in combination with the temperature monitoring value or the real-time forming degree proportional value. the input frequency of the stirring motor.
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, which is used to drive the stirrer to rotate;

discharge valve; and

The ice cream maker control system of claim 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;

Get the working status of the discharge valve of the ice cream machine; and

The input frequency of the stirring motor is adjusted according to the working state of the discharge valve combined with the temperature monitoring value or the real-time forming degree proportional value.
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 1-10 Any one of the methods for controlling the discharge speed of an ice cream machine based on temperature and molding degree or the steps of the control method for an ice cream machine according to claim 13 .