A kind of material lack of ice cream machine alarm detection method
Technical field
The present invention relates to refrigeration technology field, particularly the refrigeration of commercial or home ice cream maker and electron controls technology field.
Background technology
At present, ice cream maker normally goes to material to add ice-cream slurry in the cylinder starting working, and looks the discharging situation in the course of the work and selects reinforcedly with sensation, perhaps opens the material cylinder cap and sees whether the material cylinder lacks material and select reinforced again.If in time do not find to lack material, problems such as machine operation under refrigeration situation can occur freezing cylinder, scrapes cylinder, serious noise, shorten serviceable life of machine at stirring system that can the grievous injury machine.In addition, if in time do not find to lack material, when needs are sold ice cream, can't in time get ice cream, need after reinforced, to wait for a period of time, just normally discharging (wanting more than 5 minutes under the normal condition), the service efficiency that reduces product has greatly reduced benefit simultaneously.For the service efficiency that promotes ice cream maker and the convenience of operation, require ice cream maker to possess and lack material warning reminding function timely.
The product that possesses above-mentioned scarce material warning function in the ice cream maker industry is mainly realized in the following manner at present:
1, in the material cylinder, sets up induction installation, be used for responding to the height of liquid level in the material cylinder, to send the signal that lacks material or material is arranged to control system.The advantage of this technology is directly, is convenient to safeguard.Shortcoming is: 1) when ice-cream slurry during than thickness, induction installation misoperation can occur or be failure to actuate; 2) increase induction installation, increased machine cost; 3) because induction installation is arranged at the cleaning difficulty that has increased machine in the material cylinder.
2, in rotating speed control type ice cream maker, by the rotation speed change of rotating speed inductor detection stirring system, by being captured in the information that lacks rotation speed change under the material state, send scarce material signal to control system.The advantage of this technology is: simple in structure, the product of rotating speed type is not increased cost substantially.Shortcoming is: 1) when changing appears in voltage, as the machine resettlement, tachometer value has skew, can influence lacking the accuracy of detection of material situation; 2) when adopting the ice-cream slurry of different proportion, because its shaping resistance difference, the tachometer value when lacking material also can be different, and therefore lacking material warning precision also can be influential.Chinese patent application 200910038473X discloses a kind of by detecting the method that rotating speed control ice cream maker sends scarce material signal, but in practice process, find, adopt this method to detect the ice cream maker that lacks material and report to the police, unstable working condition, false alarm rate height.Also there is the patent of applying for passing through the warning of detection rotating speed control ice cream maker in the Tyler Corporations of the U.S., but the said firm's actual circulation all is to adopt to respond to expect that liquid level is just controlled scarce material warning in the cylinder in the product in market, equally also is the consideration in view of stability.
For the ease of better understanding the present invention, below introduce manufacture of ice cream process and characteristics thereof down earlier:
Ice cream is in manufacturing process, and the ice-cream slurry in the ice cream maker material cylinder is stirred mechanism and constantly stirs when refrigeration is condensed, and its temperature progressively descends, and condenses into half curdled appearance of delicate mouthfeel gradually.Become in the process of half curdled appearance at ice-cream slurry, along with the suffered resistance of rabbling mechanism that increases gradually of moulding ratio also becomes greatly, the stirring motor of rabbling mechanism is because load strengthens, and its working current also can increase; Along with ice-cream moulding output, ice-cream slurry hardness descends, and temperature, rotating speed go up, and current value reduces.Work as setup parameter, when reaching setting value as temperature, rotating speed, electric current or working time, ice cream maker stops refrigeration; When there was dnockout work the stand-by time that reaches setting or centre, ice cream maker reentered refrigerating state.There is certain corresponding relation in ice-cream moulding ratio with rotating speed or electric current, and in the reality, in order to observe ice-cream completed state more intuitively, rotating speed or the electric current correspondence that will be in certain scope are shown as certain specific moulding ratio.
Summary of the invention
The object of the present invention is to provide a kind of material lack of ice cream machine alarm detection method, with the operation ease that promotes ice cream maker and the accuracy of detection that lacks the material warning, prolong the serviceable life of product simultaneously.The present invention can be used in the family expenses or commercial ice cream maker of employing different control modes such as rotating speed type, temperature mode, current mode, rotating speed temperature mode and current temperature type.
The principle of institute of the present invention foundation is: when the ice cream in the material cylinder reaches certain curdled appearance, there are certain corresponding relation in its evaporating temperature and rotating speed or current value, be that temperature is more low, the ice-cream resistance of half curdled appearance in the material cylinder is more big, causes the rotating speed of stirring motor to reduce or the electric current increase; Ice cream maker is under scarce material situation, and have following characteristics: temperature descends fast, and rotating speed be maintained within a certain range can not rise, electric current also can be maintained within a certain range and can not descend.In addition, the different or different gear of the evaporating temperature that the different refrigerant system design of ice cream maker are brought is set the difference of the minimum point evaporating temperature of bringing, and does not rely on the variation of rotating speed or the electric current of machine self.
A kind of material lack of ice cream machine alarm detection method provided by the invention may further comprise the steps:
(1) rotating speed of ice cream maker rabbling mechanism is detected in the start back by speed detector, or detect the electric current of ice cream maker rabbling mechanism by current sensing means, and the temperature by temperature sensor measurement ice cream maker evaporation tank, when start detected rotating speed or electric current correspond to original shaping ratio A and temperature when original shaping set temperature value F is above, preformed temperature X when the record ice cream reaches preformed ratio B, and be saved in the system, capped when starting shooting again and satisfying above-mentioned condition next time;
(2) when the rotating speed of described rabbling mechanism or electric current corresponded to the moulding ratio, moulding was shut down, and does not report to the police; When the rotating speed of described rabbling mechanism or electric current do not reach the moulding ratio, keep certain time interval T 1 when alarming threshold value X-N1 is following at the temperature measured value, N1 is a set temperature value, 50〉N1〉0, send and lack the material alerting signal and keep alarm condition certain time interval T 2;
(3) if after sending scarce material alerting signal; in described certain time interval T 2; the temperature measured value is in always shuts down below the design temperature X-N2; N2 is another set temperature value; 50〉N2〉0; and the rotating speed of rabbling mechanism or electric current do not reach the moulding ratio and moulding when shutting down yet, and then auto stop enters holding state.
Among the present invention, recognition and tracking is set preformed temperature X automatically, adopts in conjunction with rotating speed and method of temperature and goes control system to send warning, has solved in the background technology because the problem of the scarce material warning precision that change in voltage or slurry ratio difference are brought.Move another place as ice cream maker to from a place, even voltage phase difference is bigger, ice cream maker of the present invention also can adopt the preformed temperature X that records under the new environment to cover value before automatically, change slurry behind new unlatching ice cream maker, ice cream maker of the present invention also can upgrade the preformed temperature automatically.
Step of the present invention (2) also can increase following steps: when the rotating speed of described rabbling mechanism or electric current do not reach the moulding ratio, continue to be in below the preformed temperature X at the temperature measured value, and the rotating speed of described rabbling mechanism or the no-load voltage ratio of the electric current (ratio of change in rotational speed amount and rotating speed, when the ratio of the variable quantity of current value and current value) continuing for some time T3 and be in setting variation range ± Q%, send and lack the material alerting signal and keep alarm condition certain time interval T 2.
When rotating speed or electric current do not reach the moulding ratio, the present invention adopts dual mode to detect scarce material situation, namely by detected temperatures keep certain hour below the alarming threshold value X-N1 or temperature maintenance below preformed temperature X and the basic no change of rotating speed, can find to lack the material situation more timely, remind the user in time reinforced.
In the step of the present invention (3), if after sending scarce material alerting signal, in described certain time interval T 2, the rise speed that records temperature reaches more than the design temperature rise speed, sends the alarm release signal, removes alarm condition, changes automatic refrigerating state over to.Arrange and lack material and report to the police and automatically terminate step, when temperature recovery speed reaches design temperature rise speed when above, realize that machine do not shut down work, avoid shutting down again reinforced.
As improvement of the present invention, the present invention has also set standard forming temperature X1, can increase following steps between step (1) and (2): when the actual preformed temperature X overgauge forming temperature X1 that records, control system is composed the value of X1 to X and is preserved, when the actual preformed temperature X that records was less than or equal to standard forming temperature X1, control system directly recorded the value of X and preserves.
The purpose of forming temperature X1 of setting up standard is in order abnormal conditions to occur at temperature sensor probe; during as situation such as exposed; preformed temperature X can obtain revising timely, has guaranteed in the subsequent step with preformed temperature X to serve as the correctness that changes the alarming threshold value X-N1 on basis and shut down design temperature X-N2.
Ice cream maker of the present invention is provided with a plurality of gears, and the original shaping ratio A of each gear and preformed ratio B meet following relation, and B=A*W, W are a set amount; The span of set amount W is 0.5 ~ 2.
Relative prior art, the present invention has following significant technique effect:
(1) detects moulding ratio and two parameters of evaporating temperature, and each start, judging whether automatically needs to upgrade preformed temperature X, can adapt to the voltage environment of different places to use or the slurry of different proportion automatically, effectively reduce false alarm, false alarm rate can be controlled in in 10%;
(2) arrange two kinds and lack the material detection mode, can find the scarce material situation of ice cream maker more timely;
(3) arrange and lack the step that automatically terminates that material reports to the police, when temperature recovery speed reaches more than the design temperature rise speed, realize that machine do not shut down work, avoid shutting down again reinforced;
(4) the forming temperature X1 that sets up standard, even abnormal conditions occurs at temperature sensor probe, during as situation such as exposed, preformed temperature X also can in time obtain revising, and guarantees in the subsequent step with preformed temperature X to serve as the correctness that changes the Rule of judgment on basis;
(5) mainly be on the architecture basics of ice cream maker own, make software and adjust easily, under the situation that does not have significantly to increase at cost, increased substantially degree of accuracy and operability that scarce material is reported to the police;
(6) because what adopt is that data function is set the comparison technology, can adapt to the ice cream maker of different control modes such as rotating speed type, current mode, temperature mode, during different gear in same ice cream maker, need not do any adjustment and can accurately point out warning equally.
Embodiment
The material lack of ice cream machine alarm detection method that preferred embodiment of the present invention provides may further comprise the steps:
(1) rotating speed of ice cream maker rabbling mechanism is detected in the start back by speed detector, or detect the electric current of ice cream maker rabbling mechanism by current sensing means, and the temperature by temperature sensor measurement ice cream maker evaporation tank, when start detected rotating speed or electric current correspond to original shaping ratio A and temperature when original shaping set temperature value F is above, preformed temperature X when the record ice cream reaches preformed ratio B, and be saved in the system, capped when starting shooting again and satisfying above-mentioned condition next time.Automatically recognition and tracking molding temperature X adopts in conjunction with rotating speed and method of temperature and goes control system to send warning, has solved in the background technology because the problem of the scarce material warning precision that change in voltage or slurry ratio difference are brought.
(2) established standards forming temperature X1, when the actual preformed temperature X overgauge forming temperature X1 that records, control system is composed the value of X1 to X and is preserved, and when the actual preformed temperature X that records was less than or equal to standard forming temperature X1, control system directly recorded the value of X and preserves.The forming temperature X1 that sets up standard, when abnormal conditions appearred in temperature sensor probe, preformed temperature X also can in time obtain revising, and had guaranteed in the subsequent step with forming temperature X to serve as the correctness that changes the alarming threshold value X-N1 on basis and shut down design temperature X-N2.
(3) when the rotating speed of described rabbling mechanism or electric current corresponded to the moulding ratio, moulding was shut down, and does not report to the police;
When the rotating speed of described rabbling mechanism or electric current do not reach the moulding ratio, keep certain time interval T 1 when alarming threshold value X-N1 is following at the temperature measured value, N1 is a set temperature value, 50〉N1〉0, send and lack the material alerting signal and keep alarm condition certain time interval T 2; When the temperature measured value continues to be in below the preformed temperature X, and the rotating speed of described rabbling mechanism or the no-load voltage ratio of the electric current (ratio of change in rotational speed amount and rotating speed, when the ratio of the variable quantity of current value and current value) continuing for some time T3 and be in setting variation range ± Q%, send and lack the material alerting signal and keep alarm condition certain time interval T 2.Adopt dual mode to detect and lack the material situation, namely maintain below the alarming threshold value X-N1 within a certain period of time by detected temperatures or temperature maintenance below the preformed temperature and the basic no change of rotating speed, purpose is to be convenient to find timely lack the material situation.
(4) if after sending scarce material alerting signal, in described certain time interval T 2, the temperature measured value is in always shuts down below the design temperature X-N2, N2 is another set temperature value, 50〉N2〉0, and the rotating speed of stirring structure or electric current do not reach the moulding ratio and moulding when shutting down yet, and then auto stop enters holding state; If after sending alerting signal, in described certain time interval T 2, the rise speed that records temperature reaches more than the design temperature rise speed, sends the alarm release signal, removes alarm condition, changes automatic refrigerating state over to.Arrange and lack material and report to the police and automatically terminate step, namely reach design temperature rise speed when above when temperature recovery speed, realize that machine do not shut down work, avoid shutdown to feed in raw material again.
The described ice cream maker of the embodiment of the invention is provided with a plurality of gears, and the original shaping ratio A of each gear and preformed ratio B meet following relation, and B=A*W, W are a set amount, and the span of set amount W is 0.5 ~ 2; The span of original shaping set temperature value F is: 0 ℃ ~-16 ℃.
Below (the scarce material alarm parameters of the ice cream maker of the BJ188C model of producing with the applicant is set to example) analyzed in the setting of partial parameters in the embodiment of the invention:
When 1) being set to 3 grades as ice cream maker (in the practical operation of ice cream maker, the gearshift or change slurry before all need first shutdown), the rotating speed of ice cream maker stirring motor is detected in the start back by speed detector, and the temperature by temperature sensor measurement ice cream maker evaporation tank, (effect of F is to distinguish out reinforced again situation when the original shaping set temperature value is more than F=0 ℃ when rotating speed reaches the tachometer value corresponding with original shaping ratio 65% and temperature, so a higher temperature of evaporation tank temperature gets final product when being set at than the ice cream maker operate as normal), the record rotating speed reaches the preformed temperature X corresponding with preformed ratio 96%, and be saved in the system, capped when starting shooting again and satisfying above-mentioned condition next time;
2) established standards forming temperature X1=-10, when the actual preformed temperature X that records greater than-10 the time, control system is composed the value-10 of X1 and is given X and preservation, and when the actual preformed temperature X that records was less than or equal to standard forming temperature-10, control system directly recorded the value of X and preserves;
3) when rotating speed reaches moulding ratio 99%, moulding is shut down, and does not report to the police; When rotating speed did not reach the moulding ratio: N1=6 sent to lack and expects alerting signal and kept the alarm condition certain time interval T 2=3 minute the temperature maintenance certain time interval T below alarming threshold value X-N1 in 1=1 minute; When the temperature measured value continues to be in below the preformed temperature X, and the no-load voltage ratio of rotating speed (the change in rotational speed amount accounts for the proportion of rotating speed) continues to be in setting variation range ± Q% in 30 seconds, and Q=5 sends and lacks the material alerting signal and kept alarm condition 3 minutes;
4) if after sending alerting signal, in above-mentioned 3 minutes, temperature is in always shuts down below the design temperature X-N2, N2=3, and do not reach the moulding shutdown, then auto stop enters holding state; If after sending alerting signal, in above-mentioned 3 minutes, the rise speed that records temperature reached for 10 seconds more than 1 ℃, sent the alarm release signal, removed alarm condition, changed automatic refrigerating state over to.
Rotating speed, electric current are identical with ice-cream moulding ratio corresponding relation, do not do it at this and state.