CN1465943A - Humidity cabinet with automatic fluid filling system - Google Patents

Humidity cabinet with automatic fluid filling system Download PDF

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Publication number
CN1465943A
CN1465943A CNA021321981A CN02132198A CN1465943A CN 1465943 A CN1465943 A CN 1465943A CN A021321981 A CNA021321981 A CN A021321981A CN 02132198 A CN02132198 A CN 02132198A CN 1465943 A CN1465943 A CN 1465943A
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China
Prior art keywords
fluid
pond
process controller
counter
fluid level
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Granted
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CNA021321981A
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Chinese (zh)
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CN1279324C (en
Inventor
D・A・伯克特
D·A·伯克特
兰德韦尔
T·A·兰德韦尔
米克斯
J·W·米克斯
默瑟
G·L·默瑟
瓦格迪斯
C·J·瓦格迪斯
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Henny Penny Corp
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Henny Penny Corp
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Priority claimed from US10/171,381 external-priority patent/US6670585B2/en
Application filed by Henny Penny Corp filed Critical Henny Penny Corp
Publication of CN1465943A publication Critical patent/CN1465943A/en
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Publication of CN1279324C publication Critical patent/CN1279324C/en
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Abstract

A fluid fill system includes at least one sensor for indicating whether a fluid level in a reservoir is equal to or greater than a predetermined fluid level and a process control. The process control obtains a reading from the at least one sensor at a predetermined interval and increments a counter if the reading indicates that the fluid level is equal to or greater than the predetermined fluid level and decrements the counter if the reading indicates that the fluid level is less than the predetermined fluid level. Process control operates a fluid supply mechanism when a value of the counter moves beyond a predetermined value.

Description

The humidity cabinet that has automatic fluid filling system
The application is in the U. S. application 09/671 of being entitled as of submitting on September 28th, 2000 " method that has humidity in the preservation cabinet of closed-loop humidity control system and the switch board ", 700 part continues, this application requires in the U.S. Provisional Patent Application 60/217 of being entitled as of submitting on July 12nd, 2000 " method that has humidity in the preservation cabinet of closed-loop humidity control system and the switch board ", 707, and in the U.S. Provisional Patent Application 60/156 of being entitled as of submitting on September 28th, 1999 " method that has humidity in the preservation cabinet of closed-loop humidity control system and the switch board ", 449 priority is here cited for your guidance.
Background of invention
1. Invention field
The present invention relates to a kind of preservation cabinet that more stable and more accurate preservation environment is provided for food.Especially, the present invention relates to a kind ofly keep a required fluid level to come to provide the preservation cabinet of more stable and more accurate preservation environment for food by hold the pond at fluid.
2. Description of related art
Along with cook food in advance for after " fast food " company of selling universal day by day, the food save set has been proposed such requirement, promptly food one section official hour must be kept with even temperature roughly, also taste of food, moisture, tissue and mass conservation will be kept simultaneously.In addition, in other is used, comparatively ideal be can make food, especially cooking food restores after depositing for a long time, and makes its quality still can allow the people accept.
In many cases, since food by in the prior art device provided, especially the thermal losses, the bacterium that will be by the storage condition of warm depositing (can quicken food spoilage) be experienced down of food multiplies and moisture loss, depositing of " fast food " is particularly difficult.
More particularly, it has been found that, air circulation characteristic and unsuitable storage temperature promote bacterium to multiply significantly and cause the excessive loss of the moisture of food contraction, like this in unsuitable storage environment, food will go bad after the very short time, and lost its fresh and tender, delicious food and outward appearance.
Also find, even food is stored under the advantage in closed container, food still can with the door that depends on closed container open (storage chamber just is exposed to external environment like this) time speed and go bad.
In addition, people know, are covered with outside at some food, such as fried chicken or fried fish tartar souce in the depositing of food of crackling, particularly it is desirable to both keep the fragility of crackling, the moisture loss of nexine meat can be reduced to minimum again simultaneously.Depositing of this group food often comprises the satisfied condition that repels each other outwardly, and promptly one side reduces to minimum with the moisture loss of food, simultaneously again by keeping less moisture to keep the fragility of crackling in crackling.In this group food, excessive moisture loss meeting causes shrinks and loses fresh and tenderly, and can cause adverse effect to the quality of meat.This can prevent by the temperature and humidity of control storage environment.The water loss that this problem is to prevent nexine food makes crackling keep low moisture simultaneously to crackling again.
Many cabinets that are used for preserving with the controlled state of temperature and humidity food or other article are arranged at present.Yet these cabinets all have a common shortcoming.So that when adding food or other article or taking out food or other article from cabinet, heat and humidity can be lost when opening cabinet.Unless the heat and the humidity of loss can be restored, otherwise the article that leave in the cabinet can cool off or become dry, perhaps two kinds of situations all can take place.
Fermentation and preservation are distinct food preparation processes.Fermentation is a kind of processing procedure of the bread food that normally is used to ferment, in this process, and culture propagation, and bread expands because of the culture propagation in the food.Preserving then is a kind of food process of remaining unchanged of temperature, moisture, quality and the color of its characteristic-for example during preservation that makes.Therefore, in the fermentation process, the characteristic of food can change, and in the preservation process, those characteristics remain unchanged.
According to machined parameters, the fermentation process can be different from the preservation process and mainly be lower processing temperature.Humidity can be greater than about 80%RH, but selected humidity can change in the larger context according to the concrete bread food that will leaven dough.Yet the fermentation temperature is usually less than storage temperature.Higher fermentation temperature can suppress yeast growth.And higher storage temperature is comparatively ideal, and this is because this temperature can suppress bacterium, mould etc. and multiply, and can prolong the holding time of food.
Before develop several different methods and device and attempted to keep heat and humidity.For example, in cabinet, placed tank, and made its natural evaporation to attempt to keep humidity.Although it is simple, this method and not exclusively success.This is because natural evaporation can not be made rapid compensation to wetness loss.And, when humidity increases naturally, leave the desiccation that the interior article of cabinet are subjected to heat in.In addition, because natural evaporation is caused by the temperature in the cabinet, thereby the speed of humidity regulation can the fluctuation up and down along with variations in temperature, but humidity regulation will lag behind this variations in temperature probably.
Developed the system of air heat and humidity in the switch board more critically.Air is by crossing, pass or being heated by polytype heating member.Air also can be crossed, pass or pass through water, so that increase air humidity.Although have these improvements, these known systems are because of to the cabinet environment damage, such as opening and closing cabinet path and interpolation or taking out food or other article etc. and still can't accurately regulate the loss of heat or humidity.
In addition, set up heating member and the humidity generation device has also brought new problem.If heat or humidity rise too fastly, then the interior air of cabinet may overheat or be wet excessively.This uncontrollable fluctuation in heat and the humidity can endanger food or other article that leave in the cabinet.
Cabinet is equipped with thermostat to attempt to be controlled at the temperature of the air that circulates in the cabinet usually.Yet,, also can have influence on the humidity of air by the control air themperature.In a word, depend merely on this control and can not carry out suitable control humidity in the cabinet.In addition, thermostat or manual potentiometer can't remain on predefined parameter with temperature and humidity.Generally speaking, this type of device is only reduced to setting value in air themperature and is just made heating member add hot-air when following.
The validity of humidity generation system depends in part on these systems and holds the ability that keeps fluid in the pond at fluid, and the fluid that makes fluid hold in the pond can be heated, and for example is heated to boiling point, to produce fluid steam.Fluid steam can circulate in preservation or fermentation cabinet, to form and to keep the humidity of required degree.The fluid organization of supply can be fluid and holds the pond accommodating fluid.But also there is a problem,, preserves so or the fermentation cabinet can become moist if promptly fluid does not remain on fluid and holds in the pond.For example, fluid level sensor does not accurately measure fluid and holds fluid level in the pond.It is inoperative that fluid organization of supply or fluid level sensor may become.Consequently, fluid holds Chi Biankong, and humidity produces system can not be for preserving the cabinet humidification.
When fluid adds fluid to and holds the pond also another problem can appear.When fluid added fluid to and holds the pond, the fluid level that fluid holds in the pond fluctuateed because of fluid turbulence.Consequently, fluid level sensor can detect fluid and holds the fastish variation of pond inner fluid height.Fluid level in fluid holds the pond is when being considered to fluid and holding the height that the pond is filled, the fluid level that fluid level sensor detects represents that might fluid holding the pond has been full of, also might hold also underfill of pond by fluid, this will decide on the degree that fluid holds the turbulent flow in the pond.If controlling the fluid organization of supply, the fluid level that an automatic filling system records according to fluid level sensor holds the pond accommodating fluid to fluid, alternating signal can damage the various parts of fluid organization of supply, for example, fluid pump, fluid motor, valve or the like, that is to move or close because of the alternating signal of these unit response fluid level sensor.In addition, when the alternating signal of these unit response fluid level sensor and when moving and closing, such circulation meeting forms extra eddy current and fluctuation in fluid level sensor.
Summary of the invention
Thereby, need a kind of preservation cabinet that is used for realizing the control of closed loop humidity by effective humidity transducer.Also need a kind of cupboard of leavening dough and preserving of can being used to simultaneously.Characteristics of this cupboard are its control system acquiescence and the relevant common higher temperature of preservation operator scheme.The advantage of this default setting is, this cabinet can suppress multiplying of bacterium in the food.
Also need a kind of fluid perfusion system and accurately measure the fluid level of holding in the pond and the method that keeps holding the fluid level in the pond, make humidity produce system and can make one or more preservations or fermentation cabinet humidity.Especially, need a perfusion of fluid to hold the system and method in pond, make the fluid that holds in the pond remain on a required height, and the damage of the parts of convection cell organization of supply is reduced or eliminated.
In one embodiment of this invention, disclosed a kind of method that has the preservation cabinet of closed-loop humidity control system and be used for controlling preservation cabinet humidity.This method comprises: determine the relative humidity set point; Activate the heater in the fluid slot; Judge and whether have fluid in this fluid slot; Measure the relative humidity in the cabinet; And this relative humidity maintained in the preset range.
According to another embodiment of the present invention, the preservation cabinet that has a closed-loop humidity control system includes: preserve cabinet; Be used to measure the air themperature detector of air themperature in the cabinet; Be used to measure the humidity sensor of humidity in the cabinet; Be used for heater with air heat predetermined temperature in the cabinet; Be used to make air circulation and be used for introducing the draft fan of air from the outside of preserving cabinet; Slip vent and motor; And be used for making the water capacity to be contained in the tank of preserving cabinet.
According to another embodiment of the present invention, a kind of system that is used for moisture measurement comprises: humidity sensor; Oscillating circuit; And the microprocessor that is used to measure frequency of oscillation.According to still another embodiment of the invention, a kind ofly be used to keep the system of relative humidity in the cabinet to comprise: the device that is used for determining the relative humidity set point; Be used for activating the device of the heater of fluid slot; Be used for judging whether fluid slot exists the device of fluid; Be used to measure the device of the relative humidity in the cabinet; And be used for relative humidity is maintained device in the preset range.
In another embodiment of the present invention, the fluid perfusion system comprises that at least one detection holds the sensor whether fluid level in the pond is equal to or greater than the predetermined fluid height, and process controller, wherein process controller obtains reading termly from least one sensor, if reading indication fluid level is equal to or greater than predetermined altitude and just counter is rised in value, if reading indication fluid level less than predetermined altitude just to the counter depreciation, wherein when the numerical value of counter became above predetermined value, process controller was handled the fluid organization of supply.
In another embodiment of the present invention, the method of holding basin irrigation beam body is comprised following step: obtain the fluid level reading termly, whether the fluid level of holding in the pond with judgement is equal to or greater than predetermined altitude, if the fluid level reading is equal to or greater than predetermined altitude, just counter is rised in value, if the fluid level reading is less than predetermined altitude, just to the counter depreciation; And become above predetermined value when the numerical value of counter, just handle the fluid organization of supply.
After having consulted following detailed description to preferred embodiment of the present invention in conjunction with the accompanying drawings, the skilled artisan in the art can understand other purpose, characteristics and advantage.
Brief description
Provide and the of the present invention all embodiment that can not constitute any restriction to the present invention of purpose with example are only described below with reference to accompanying drawings.
Fig. 1 shows the front view of the preservation cabinet of one embodiment of the invention.
Fig. 2 shows the side view of the preservation cabinet of one embodiment of the invention.
Fig. 3 shows the cutaway view that the present invention who dissects along the line III-III among Fig. 1 preserves cabinet.
Fig. 4 shows the cutaway view that the present invention who dissects along the line IV-IV among Fig. 2 preserves cabinet.
Fig. 5 is the interior air of the preservation cabinet of one embodiment of the invention and the circulation schematic diagram of moisture.
Fig. 6 is the stereogram of the sink cover ring assemblies of one embodiment of the invention.
Fig. 7 is that the humidity of the preservation cabinet of one embodiment of the invention produces the interconnective schematic diagram of groove and control and supervision.
Fig. 8 shows the circuit of the Humidity Detection transducer of one embodiment of the invention.
Fig. 9 A and 9B are the side view and the vertical views of the slip vent of one embodiment of the invention.
Figure 10 A and 10B are the slip vent of one embodiment of the invention and the schematic diagram of cabinet opening.
Figure 11 is the flow chart of the ventilation operation process of one embodiment of the invention.
Figure 12 be one embodiment of the invention be used to slide the flow chart of calibration process of vent motor.
Figure 13 shows the sliding part ventilation cycle of one embodiment of the invention.
Figure 14 A shows the humidity regulation state diagram of one embodiment of the invention.
Figure 14 B is the flow chart of the humidity control procedure of one embodiment of the invention.
Figure 15 is the flow chart of the increase humidity process of one embodiment of the invention.
Figure 16 shows the flow chart of the running of closed-loop humidity control system.
Figure 17 shows the fluid perfusion system of one embodiment of the invention.
Figure 18 one illustrates the flow chart of running of the fluid perfusion system of one embodiment of the invention.
The detailed description of preferred embodiment
Can understand embodiments of the invention and technological merit thereof better by consulting Fig. 1-13, wherein identical label is represented part identical and corresponding among each figure.
See also Fig. 1 and 2, show the front view and the side view of the preservation cabinet of one embodiment of the invention among the figure respectively.Preserve cabinet 100 and have anterior 102, rear portion 104 and two sidepieces 106 and 108.Front portion 102 and rear portion 104 all can have the door that at least one fan has corresponding locking mechanism 110.In the embodiment shown in Fig. 1 and 2, front portion 102 and rear portion 104 respectively have two fan doors.
The housing equipment that is used for controlling the relative humidity of preserving cabinet 100 is provided with module 114.In one embodiment, preserve cabinet 100 and can be provided with a plurality of wheels 112.
See also Fig. 3, there is shown the cutaway view that the present invention who dissects along the line III-III among Fig. 1 preserves cabinet.See also Fig. 4, there is shown the cutaway view that the present invention who dissects along the line IV-IV among Fig. 2 preserves cabinet.
See also Fig. 5, there is shown the air in the preservation cabinet of one embodiment of the invention and the circulation schematic diagram of moisture.Be provided with blower motor 708 and heater 706.In the illustrated embodiment, be provided with two heaters 706; Also can use other quantity and at the heater 706 of diverse location.
Tank 316 is provided with sink cover ring assemblies 502, at length shows this assembly among Fig. 6.Sink cover ring assemblies 502 comprises interior ring 520, outer shroud 522 and covers 524.Can be provided with steam outlet 526.In one embodiment, on the relative both sides of annulus, be provided with two floss holes 526.
Please consult Fig. 5 again, the water in the tank 316 is heated by tank heater 506, will make the water in the tank 316 flash to steam 504 like this.The interior ring 520 of assembly 502 and outer shroud 522 are assembled the heat that is produced by tank heater 506 and are beneficial to evaporation.
Fig. 7 shows the block diagram of the system 700 of one embodiment of the invention.This system 700 includes measures the air themperature detector 702 of preserving the air themperature in the cabinet.This air themperature detector 702 also can be used for providing temperature-compensating for humidity sensor 704.In one embodiment, this air themperature detector 702 can be the product of DC32006A-3-18 for the Part No. of being made by the Durex Industries of Illinois Cary.
Humidity sensor 704 is measured the relative humidity (H1) of air in the cabinet.In one embodiment, humidity sensor 704 can be the E﹠amp that is made by the JLC International of Pennsylvania Warminster; The product of E electronic component EE00-FR3.Air heater 706 with air heat in the cabinet to by the set point of user's appointment.In one embodiment, air heater 706 can be 500W, 1000W or the 1500W of the Part No. U3-32-764-34 that made by the Watlow of Missouri State Hannibal.Draft fan 708 circulates heated air in preserving cabinet, so that the volume of whole preservation cabinet is in identical temperature.In one embodiment, draft fan 708 can be Part No. SX-19695 (240V) or the SX-20441 (208V) that is made by the Jakel of Illinois Highland.
Tank 716 holds and will be boiled to increase the water of humidity.In one embodiment, tank heater 722 can be the #-8-MSM22866-xxx that is made by the Minco of Minnesota State Minneapolis.In another embodiment, heating member can be separated with tank 716.Be provided with float switch 720 to determine the water level in the tank 716.In one embodiment, when water level was lower than desired height, this float switch 720 can be controlled water flowed in the tank 716 it.One tank heater (RTD) temperature sensor 723 is attached on the tank heater 722.Perhaps, this sensor 723 can become an integral body with heater 722.But the temperature of sensor 723 HEATER FOR MEASURING 722, and the measured thus temperature value of general inputs to system 700.
Tank heater temperature sensor 723 links to each other with control system 700, so as to guarantee ought at least two kinds situation (first kind, when not having water in the tank 716; Second kind, when float switch is forbidden work) one of them when taking place, tank heater 722 keeps turn-offing.In normal operation, float switch 720 sends the vacant signal of expression tank 716 to control system 700, so control system 700 can not activate tank heater 722.Yet backlog, chip or abuse can cause that float switch 720 forbids work on " full water groove " position.If tank heater 722 is activated when tank 716 is vacant, then tank 716 and tank heater 722 can be impaired rapidly.Tank heater temperature sensor 723 is used as the reinforcement of float switch 720, so that reduce or eliminate tank 716 or tank heater 722 or both are caused the danger of this type of infringement.
Moving of slip vent motor 730 control slip vents, it opens and closes the ventilating opening of preserving cabinet successively.Be provided with slip vent position switch 732, so that indication vent situation.In one embodiment, slip vent position switch 732 can be the Part No. KWABQACC that is made by the CherryElectrical Products of state of Wisconsin Pleasant Prairie.This switch 732 also can be a kind of optics near switch.
The input and output of process are connected with process control as shown in the figure.Temperature sensor 798 is installed in the heater 722, is used to measure the tank temperature.
Air themperature in the cabinet is regulated by air temperature sensor 702, air heater 706 and draft fan 708.The adjusting of air themperature is conspicuous for those those of skill in the art in the art, and it comprises simply with the set point of air temperature modification to program composition.This can be constant temperature (ON/OFF) control that a kind of simple band lags behind, and perhaps can be a kind of more most advanced and sophisticated PID (ratio/integration/derivative) control algolithm.
Humidity can be by 1) when humidity in the cabinet is lower than the humidity set point, increase humidity and 2) when humidity in the cabinet is higher than the set point of program composition, reduces humidity in the cabinet and regulate by outside air is introduced.Therefore, have two kinds of independently systems that are used to regulate humidity: humidity produces system and " ventilation " system.
See also Fig. 8, there is shown the humidity transducer circuit 800 of one embodiment of the invention.Timer U1 formation has by capacitor C x, C 1And resistor R 1The output frequency F that sets oAstable oscillator.Capacitor C 2And C 3Establish bypass to power supply.Capacitor C 1Cut off the transducer C that direct current (DC) voltage is damaged by dc voltage to meeting xResistor R 1Setpoint frequency F oResistor R 2Discharging is from capacitor C between the power decrement phase 1Electric charge.Transducer C xElectric capacity change along with humidity.Microprocessor μ P is by 1/16 second pulse (n of calculating 2) measure F oCycle.
The example value that is used for each parts of Fig. 8 is as follows:
Parts Value
?U1 LMC 555 C timers
?R 1 ?24.9K
?R 2 ?5M
?C 1 ?.039μF，50V，1％，100PAM
?C 2 0.1 μ F ceramic disk
?C 3 10 μ F tantalums
?C x Humidity transducer, E﹠E Electronik EE00-F123
Percentage relative humidity (%RH) can be determined by following equation: % RH = 419.734 ( 4343.287 n 2 + 360 - 1 )
Capacitor C xAlso be subjected to Temperature Influence, therefore, %RH can do temperature-compensating by following equation:
％RH c＝[(T F-140)(0.0016667)+1](％RH)
Wherein:
T FBe °F being the air themperature of unit.%RH cBe used for showing and regulating humidity.
System of the present invention can implement the operating mode of leavening dough.As mentioned above, the present invention can be combined in fermentation and hold function in the single cabinet.For example, when the situation of any power rising begins, be used for the user interface of control system, for example display can provide the chance of starting " fermentation " option to the user.The user can have limited, the window in ten (10) seconds for example of a time, accepts this option in this window.The user can be by activating a special key, and for example this option is accepted in the combination of TEMP switch or all switches.If this option is unaccredited words during timing window, then (higher temperature) pattern is preserved in the control system starting.Yet, if the received words of this option, this control system starting fermentation (lower temperature) pattern.
Preserve with the difference of fermentation pattern and be to allow the different of air maximum temperature set point.For example, in the fermentation pattern, can allow air maximum temperature set point to can be minimum storage temperature.Therefore, if minimum storage temperature is 150 °F, then maximum fermentation temperature set-point should be 150 °F.Similarly, if minimum storage temperature is 150 °F, then the allowed air of preservation mode maximum temperature set point can be 220 °F, and the temperature range of preservation mode can be 150 °F-220 °F.
See also Fig. 9 A and 9B, show the side view and the vertical view of the slip vent of one embodiment of the invention among the figure respectively.Generally speaking, cabinet panel 902 is provided with slidable panels 904.Cabinet panel 902 and slidable panels 904 all have at least one opening 906.In one embodiment, the opening 906 in the cabinet panel 902 is fixed, and the opening 906 in the slidable panels 904 can slide with respect to the opening in the cabinet panel 902 906.Gear motor 908 Linear Driving slidable panels 904 are so that open or close opening 906 by lever arm 912 and sliding pin 914.In one embodiment, this motor 908 is the model EB-5206 by the Custom Products Co., Ltd manufacturing of health alunite Dick state New Haven, or makes the Part No. AB that joint-stock company makes by the Hurst of the Princeton of Indiana.
When slidable panels 904 slided with respect to cabinet panel 902, the opening 906 on the slidable panels 904 alignd with opening 906 on the cabinet panel 902, so opened the passage that leads to fans entrance and outlet (not shown).When slidable panels 904 slided its whole process, the opening 906 in the cabinet panel 902 was opened fully.At this moment, slidable panels 904 beginning reverse slide, so the opening 906 in the cabinet panel 902 be capped, thereby blocked the path that leads to fans entrance and outlet (not shown).
Switch 916 is provided for indicating ventilating opening 906 when to be fully closed.In another embodiment, switch 916 is provided for indicating ventilating opening 906 when to be opened fully.This variation can be depending on the position of switch 916 with respect to slidable panels 904.Other layout type also can be provided as required.Switch 916 can use between alignment epoch, in order to determine the cycle of slip vent 904.This will be described in detail hereinafter.
See also Figure 10 A and 10B, show respectively among the figure and be arranged in it and close slip vent with open position.In Figure 10 A, slip vent 904 is configured to: air can not flow into from the outside of cabinet the fans entrance 1010 and from blower fan exhaust outlet 1012 flow out.Yet when motor 908 was activated, slip vent 904 moved, shown in Figure 10 B, so that open fans entrance 1010 and blower fan exhaust outlet 1012.
See also Figure 11, there is shown the flow chart of the common running of cabinet.In step 1102, cabinet power increases.This can comprise all cabinet parts of initialization, and this is known in the art any those of ordinary skill.
In step 1104, calibration vent motor.Among this process Figure 12 and 13 hereinafter more detailed description is arranged.
See also Figure 12, there is shown the flow chart of the slip vent motor calibration process of one embodiment of the invention.The purpose of this calibration is to calculate vent is moved to the variation of required real time of another position from a position.Even use synchronous AC (AC) motor, because 1) line frequency can be 50Hz or 60Hz and 2) friction and chip in the mechanism can make the mobile of vent slow down, and therefore the time that is used to rotate a circle also can change to some extent.
Generally speaking, control software need be known the time that is used for vent to be moved to from the fully open position a complete week of complete closed position.Because the vent switch activates on the position that vent is fully closed, so controller knows when vent is fully closed.Therefore, be T if be used for the actual cycle that vent moves VENT, then vent is in time T VENTOpened fully on/2.Equally, controller can be by making motor at T VENTA period of time of a fractional value in activate vent moved to other position, the area of opening such as 50%.For example, for ventilating opening being opened to about 50% the area of opening, controller from open fully or fully the closed position make the about T of motor activated VENT/ 4 times.
In one embodiment, though ventilating opening is opened the linear function that area is not the vent motor activated time, it provides a suitable approximation, thereby the available vent motor activated time is located the slip vent.In another embodiment, the different shape that is used for ventilating opening can be used to provide motor activated time and ventilating opening to open linear relationship between the area.
Figure 13 shows up to the ventilation operation that relates to controller.When motor rotation and vent actuating vent switch, in fact the vent switch activated a period of time, and this can be referred to as " holdup time " or T DWELLController makes motor activated can calculate T when obtaining required time of a given vent position in calculating DWELL
Please consult Figure 12 once more, in one embodiment, the ventilation calibration procedure adopts a timer of working all the time, with regard to no longer starting or having stopped timer, it is resetted to seek holdup time and cycle like this.In step 1202, between timer and relay sync period, exist a predetermined delay.In one embodiment, this can be delay in a second; Certainly also can adopt other delay as required.In another embodiment, can omit this delay.
In step 1204, timer and relay synchronously after, the vent motor is activated, thereby the slip vent is moved.With this timer zero clearing, and in step 1208, controller is waited for first switching signal from draft switch in step 1206.This signal indication draft switch just is activated.If do not have switching signal in the given time, then in step 1210, show error message to the user.This can be a vision or audible signal, such as CRT (cathode-ray tube), LED (light emitting diode), bell, clock etc.In one embodiment, to the appropriate information of user's demonstration such as " ventilate and stop up ".
In one embodiment, predetermined amount of time can be for 48 seconds.Certainly also can adopt other reasonable time length as required.This time especially can be selected according to known ventilation cycle commonly used.This time also can be selected for preventing to damage motor.After disappearing at the fixed time, motor can be turned off.
If receive the signal from the vent switch in step 1208, then with the timer zero clearing, and in step 1214, controller is waited for from second switching signal vent switch, that expression vent switch no longer activated.Similar to the above is, does not receive the signal from the vent switch if the scheduled time disappears, and then circular is given the user in step 1210.In case receive second switching signal, then in step 1216, timer is read out, expression holdup time or T DWELLIn step 1220, be similar to step 1208 and 1214, controller is waited for the switching signal from the vent switch.In case the switching signal of receiving, the expression vent has been finished its circulation, and in step 1222, timer is read out.Here it is T VENT
In step 1224, vent is moved into complete closed position.As mentioned above, this can be by activating motor T VENT/ 2 times realized.
Controller can utilize the required time of mobile vent to detect fault in the ventilating system.If the time of its cost, then controller supposed that this vent is blocked more than the complete required scheduled time in a week of rotation, perhaps motor breaks down, and shows fault message.
Please consult Figure 11 once more, in step 1106, controller judges whether vent position is arranged in the predetermined tolerance of its desired position.In one embodiment, vent position can be expressed as and open percentage---and open to 0% from 100% and open.Judge in this step whether physical location is arranged in the predetermined window of desired location.This can be about 10%, 5%, 2% etc.In one embodiment, it is about 1%.If vent is arranged in this window, then need not regulate.
If judge that in step 1108 vent is not arranged in predetermined window, then blower motor is activated a period of time, so that vent is moved to its desired location.
In step 1110, the power of supplying with this device can descend.When taking place, along with the air themperature in the cabinet descends, moisture can condense on the humidity sensor.Like this will 1) damage humidity sensor or 2) during operating, bring wrong moisture readings.For this problem is made compensation, in one embodiment, this device enters " removing " pattern that is activated when gauge tap when " running " is changed to " standby " or " shutoff ".In this pattern, air heater and water heater all are cut off, if humidity greater than predetermined value, then fan is activated.The predetermined moisture value can be selected to the compromise between low humidity (being significantly less than 100%) and the high ambient humidity that had in dining room or other environment of operation.In one embodiment, this percentage can be 80%.
When fan is activated, be injected in the cabinet from the cabinet air outside, be in order to prevent that humidity exceeds predetermined value in the cabinet mostly.Generally speaking, humidity comprises adjusting to the output of the thermal output of water and blower motor in the switch board.The thermal output of water is activated usually, so that increase humidity in the cabinet, and ventilating opening is opened usually, so that reduce humidity in the cabinet.
According to one embodiment of the invention, humidity control method is made up of three kinds of states: free time, increase humidity and minimizing humidity.See also Figure 14 A, there is shown a kind of humidity regulation state diagram.In reducing the state of humidity, have how much ventilating opening is opened 50% or 100% greater than set point according to actual humidity.Certainly also can adopt other opening percentage as required.Figure 14 B shows the chart of humidity regulation.
In addition, the span of control limit of control of SP+9%RH and SP+7% just in time equals the hysteresis band that switches between about 50% and about 100% ventilation orifice.
In increasing the state of humidity, the load period (duty cycle) that final (net) result of flowchart logic is to be identified for the thermal output of water sets value.This load period is in the cycle in 2 seconds of connecting hydro-thermal, occupies number at interval in 1/16 second.For example, in 25% load period, heat was switched on for 0.5 second, was the interval in 8 1/16 seconds.See also Figure 15, there is shown the flow chart of the increase humidity logic of one embodiment of the invention.
Humidity control is similar to PID control, but derived information only is used to upgrade the integration item.
When actual humidity equaled set point, program block 1502 to 1508 was provided with the load period of hydro-thermal.If temperature is lower than 125 °F, then load period is configured to 25%.If temperature is higher than 125 °F, then load period is configured to 31%.These cycles are used to make humidity to maintain near the set point.On higher temperature, need higher load period.Surpass 3%RH if actual humidity is lower than the humidity set point, then program block 1510 and 1512 is arranged to 100% (connecting fully) with load period.This is used for humidity is brought back to set point.Program block 1514 calculates humidity errors (humidity set point-actual humidity), and it is kept in the variable that is referred to as hum-temp-byte (humidity-temperature-byte).
Program block 1516-1526 regulates integration correction term I.E.L.[representative coding variable i ntegral errorlevel (integration-error-amplitude)].Test in the program block 1516 is limited in I.E.L. 20 and 200 value.Program block 1518 joins the humidity error among the I.E.L..If humidity is reducing, then program block 1520 to 1526 makes I.E.L. increase by 5, and if humidity when increasing, then from I.E.L., deduct 20.
Though no matter when the initialization of not shown I.E.L. enters the increase moisture condition or no matter when measured humidity equals set point, I.E.L. all is configured to zero.
Program block 1528 is provided with a new variable E.O.[from the value of the I.E.L. that has just found and is used for error-offset (error-side-play amount)].The value that is noted that bigger I.E.L. causes the value of bigger E.O..
Program block 1530 is found load period turn-on time to be referred to as t (on) [t (connection)].T (connection) is the function of E.O. and air themperature Ta.T (connection) just in time is the summation that depends on the value of the constant of air themperature and E.O..
At last, to demonstrate the actual load cycle be to calculate from t (connection)/31 to program block 1532.Because the 16Hz clock is used for hydro-thermal output, thereby divisor is " 31 ".The load period cycle was 2 seconds, but clock reality counts up to 31 from 0.
See also Figure 16, there is shown the flow chart of the running of closed-loop humidity control system.In this chart, T HBe temperature by the measured tank heater of tank heater temperature sensor 723, and T UMIt then is the maximum tank temperature that allows.When float switch 720 was forbidden work, the float switch fault was true.When float switch 720 can't accurately detect the significant change of tank 716 middle water levels, this float switch broke down.
To at length introduce various function situations according to Figure 16 now.If find that in normal operation tank 716 is vacant, then float switch 720 will be pointed out low water level (step B), and show " low water level " information (step F).So tank heater 722 will be forbidden work (step I), and control system 700 will be finished its operation (step L).
Similarly, if find mistakenly that in normal operation tank 716 is vacant, then float switch 720 will be pointed out low water level (step B) once more.Yet whether control system 700 will inquire T H＞T LIM(step C).If T H≤ T LIM, then the float switch fault is true (step D), and tank heater 722 can use (step J).So control system 700 is finished its operation (step L) once more.
If detect the float switch fault, then can detect low water level (step B) once more, and whether control system 700 will inquire T once more H＞T LIM(step C).If T H＞T LIM, then tank 716 is vacant or water level is lower, and the float switch fault is true (step e).So display will show " float switch fault " and " lack of water " or " tank is vacant " (step G).Tank heater 722 will be forbidden work (step I), and control system 700 will be finished its operation (step L).
When waiting for the float switch fault clearance, float switch 720 will show the water level in the tank 716 lower (step B) at first.So whether control system 700 will inquire T H＞T LIM(step C).If T H≤ T LIM, then the float switch fault is true (step D), and if T H＞(T LIM-100 °F) or the delay timer that has resetted be not configured to zero (step H), then tank heater 722 is forbidden work (step I).So control system 700 will be finished its operation (step L).
In case the zero clearing of float switch fault, if float switch 720 is pointed out the water level lower (step B) in the tank 716, then whether control system 700 just inquires T H＞T LIM(step C).If T H≤ T LIM, then the float switch fault is true (step D), and whether control system 700 inquires T H＞(T LIM-100 °F), and the delay timer that whether has resetted is configured to zero (step H).If both of these case exists simultaneously, then the float switch fault is false (step K), and makes tank heater 722 can use (step J).So control system 700 will be finished its operation (step L).
Figure 17 illustrates the fluid perfusion system 1700 of one embodiment of the invention.Fluid perfusion system 1700 comprises holds pond 1701, a fluid supply line 1702, a fluid organization of supply 1703, a fluid level sensor 1704 and a process controller 1705.
Fluid holds pond 1701 can be the fluid of MCS maintenance such as water.Fluid holds pond 1701 can comprise a groove or container etc., and it can receive and keep the fluid such as water.Fluid can be fed to by fluid supply tube road 1702 and hold pond 1701.Fluid supply tube road 1702 can comprise a fluid organization of supply 1703, and for example the fluid supply valve 1703.Fluid organization of supply 1703 can be arranged in the fluid supply tube road 1702, to open fluid supply tube road 1702, fluid is fed to holds in the pond 1701, or close the fluid supply tube road, holds in the pond 1701 in case the fluid stopping body flows to.Fluid organization of supply 1703 can comprise that one can be activated to open and close the magnetic valve in fluid supply tube road 1702.In the another embodiment of the present invention (not shown), the fluid organization of supply can comprise once fluid supply tube road 1702 and supplies fluid to the pump that holds pond 1701.Fluid supply tube road 1702 can comprise the one or more fluid supply tube road 1702 that holds pond 1701 that supplies fluid to.
One fluid level sensor 1704, for example a float switch etc. can be arranged on and hold in the pond 1701, to detect, for example measures the fluid level of holding in the pond 1701.In an embodiment of the present invention, fluid level sensor 1704 can detect the fluid level of holding in the pond 1701, and whether the fluid level that indication is held in the pond 1701 is equal to or greater than predetermined altitude.Predetermined altitude can be considered to that full fluid level corresponding to holding pond 1701.In this embodiment, fluid level sensor 1704 has two states: the fluid level that the indication of first state is held in the pond 1701 is equal to or greater than predetermined altitude, and the fluid level that the indication of second state is held in the pond 1701 is lower than predetermined altitude.When the fluid level in holding pond 1701 is equal to or greater than predetermined altitude, fluid level sensor 1704 will be indicated so.When the fluid level in holding pond 1701 is lower than predetermined altitude, fluid level sensor 1704 also will be indicated so.If needed, fluid level sensor 1704 can be adjusted to and can detect different predetermined fluid height.As fluid level sensor 1704, hold fluid level in the pond 1701 with a float switch or analog with detection.In addition, more than one fluid level sensor 1704 can be set in holding pond 1701.
Process controller 1705 can comprise a processor or a microprocessor or the like.Process controller 1705 is communicated with fluid organization of supply 1703, to handle fluid organization of supply 1703, fluid organization of supply 1703 is worked (work) or inoperative (not working).Process controller 1705 can be handled fluid organization of supply 1703 and supply fluid to and hold pond 1701, or process controller can be handled fluid organization of supply 1703 and stops holding pond 1701 accommodating fluids.For example, process controller 1705 can be handled fluid organization of supply 1703 to holding pond 1701 accommodating fluids to open fluid supply tube road 1702 by activating fluid supply valve 1703, makes fluid be fed to and holds in the pond 1701.Process controller can make fluid supply valve 1703 not work to cut out fluid supply tube road 1702, handles fluid organization of supply 1703 and stops holding pond 1701 accommodating fluids.By making 1703 work of fluid organization of supply selectively or not working, process controller 1705 can be regulated the fluid level of holding in the pond 1701.
Fluid level sensor 1704 is communicated with process controller 1705, makes process controller 1705 can monitor the fluid level of holding in the pond 1701.Process controller 1705 and fluid level sensor 1704 can number of ways be communicated with.For example, process controller 1705 can be inquired fluid level sensor 1704 termly, and the reading with the fluid level that obtains to hold pond 1701 makes process controller 1705 monitoring hold the fluid level in pond 1701.Whether the fluid level that each reading indication of fluid level sensor 1704 is held in the pond 1701 is equal to or greater than predetermined altitude, or whether the fluid level of holding in the pond 1701 is lower than predetermined altitude.In another embodiment of the present invention, fluid level sensor 1704 can detect the fluid level of holding pond 1701 termly, and each reading is sent in the process controller 1705, makes process controller 1705 can monitor the fluid level of holding in the pond 1701.Each reading from fluid level sensor 1704 indicates whether that the fluid level of holding in the pond 1701 is equal to or greater than predetermined altitude, or the fluid level of not holding in the pond 1701 is lower than predetermined altitude.In addition, predetermined space (regularly) can be selected in the scope of predetermined space, makes the frequency that process controller 1705 can be different obtain reading from fluid level sensor 1704.
In another embodiment, fluid level sensor 1704 is communicated with process controller 1705 termly, process controller 1705 is obtained corresponding to the fluid level reading that holds the fluid level in the pond 1701, thus, can make process controller 1705 monitor the fluid level of holding in the pond 1701.Process controller 1705 can carry out addend or subtrahend to the counter (not shown) according to each reading.For example, if the fluid level that the indication of the reading of fluid level sensor 1704 is held in the pond 1701 is equal to or greater than predetermined altitude, process controller 1705 can add one to counter.When each process controller 1705 obtained to indicate the fluid level of holding in the pond 1701 to be equal to or greater than the fluid level reading of predetermined altitude from fluid level sensor 1704,1705 pairs of counters of process controller added one.If the fluid level that the indication of the reading of fluid level sensor 1704 is held in the pond 1701 is lower than predetermined altitude, 1705 pairs of counters of process controller subtract one.When each process controller 1705 obtained to indicate the fluid level of holding in the pond 1701 to be lower than the fluid level reading of predetermined altitude from fluid level sensor 1704,1705 pairs of counters of process controller subtracted one.
1705 pairs of counter increments of each process controller or depreciation, process controller 1705 is gone back the numerical value of monitor counter.In one embodiment of the invention, the numerical value of 1705 pairs of counters of process controller and one or more preset count device numerical value compare.Preset count device numerical value is corresponding to the fluid level of holding in the pond 1701, to carry out fluid perfusion operation or the like.For example, preset count device numerical value can comprise first counter values, and this numerical value is corresponding to fluid being added to the fluid level of holding pond 1701 of holding pond 1701.Preset count device numerical value comprises second counter values, and this numerical value is not added to the fluid level of holding pond 1701 of holding pond 1701 corresponding to fluid.
In running, fluid level sensor 1704 detects termly holds the fluid level in pond 1701, and each reading is sent to process controller 1705.Fluid level drops under the predetermined altitude in holding pond 1701, and fluid level sensor 1704 is the test fluid height termly, and each reading is sent in the process controller 1705.Each process controller 1705 obtains to indicate the reading of fluid level under predetermined altitude that holds in the pond 1701,1705 pairs of counter depreciations of process controller from fluid level sensor 1704.When process controller is judged counter, and the numerical value of counter is less than first counter values, and 1705 of process controllers are handled fluid organization of supply 1703 with to holding pond 1701 accommodating fluids.Fluid level in holding pond 1701 is increased on the predetermined altitude, fluid level sensor 1704 test fluid height termly then, and each reading is sent in the process controller 1705.Hold each reading that fluid level in the pond 1701 is equal to or greater than predetermined altitude, 1705 pairs of counters increments of process controller for the indication that from fluid level sensor 1704, obtains.When process controller 1705 to counter increment, when making the numerical value of counter surpass second counter values, process controller 1705 can be handled fluid organization of supply 1703 to stop holding pond 1701 accommodating fluids.
In another embodiment of the present invention, process controller 1705 can be inquired fluid level sensor 1704 termly, to obtain to hold the reading of the fluid level in the pond 1701.Fluid level in holding pond 1701 drops under the predetermined altitude, fluid level sensor 1704 test fluid height.When process controller 1705 was inquired fluid level sensor 1704 termly, process controller 1705 can obtain to hold the reading of fluid level in the pond 1701 from fluid level sensor 1704.When each process controller 1705 obtained an indication and holds reading under predetermined altitude of fluid level in the pond 1701, process controller 1705 was just to the counter depreciation.When process controller 1705 has made the counter subtrahend, so that the numerical value of counter is during less than first counter values, and process controller 1705 is just handled 1703 pairs of fluid organizations of supply and held pond 1701 accommodating fluids.When the fluid level in holding pond 1701 was increased on the predetermined altitude, fluid level sensor 1704 is the test fluid height termly.Process controller 1705 obtains the fluid level reading termly from fluid level sensor 1704.When each process controller 1705 is read fluid level sensor 1704 and obtains an indication to hold fluid level in the pond 1701 and be equal to or greater than the reading of predetermined altitude, 1705 pairs of counters increments of process controller.When process controller 1705 to counter increment, when making the numerical value of counter surpass second counter values, process controller 1705 can be handled fluid organization of supply 1703 to stop holding pond 1701 accommodating fluids.
According to these embodiment of the present invention, under counter depreciation to the first counter values, process controller 1705 just can be handled fluid organization of supply 1703 to holding pond 1701 accommodating fluids.Thereby can make process controller 1705 accurately begin the fluid perfusion running selection of first counter values and process controller 1705 obtain the fluid level reading termly from fluid level sensor 1704 blanking time.In addition, in holding the fluid perfusion operation in pond 1701, to second counter values, process controller 1705 is just handled fluid organization of supply 103 and is stopped holding pond 1701 accommodating fluids up to the counter increment.Thereby can make process controller 1705 accurately stop the fluid perfusion running selection of second counter values and process controller 1705 obtain the fluid level reading termly from fluid level sensor 1704 blanking time.In addition, because process controller can accurately stop perfusion running, the present invention eliminates or has reduced the circulation that the parts of fluid perfusion mechanism are alternately opened and broken fast, and this circulation can damage the parts in known system and the method.
By following Example, further illustrate the present invention, these examples are used for the present invention is illustrated purely.In one embodiment of the invention, first counter values is set in 16, the second counter values and is set in 64.In addition, process controller per second 16 times, be from fluid level sensor, to obtain the fluid level reading in per 1/16 second.When the fluid level in holding the pond was lower than predetermined altitude, the fluid level that process controller holds in the pond at indication was lower than each reading of predetermined altitude to the counter depreciation to process controller from fluid level sensor acquisition reading in per 1/16 second.In case process controller is to the numerical value of counter depreciation to 15, promptly depreciation to is lower than the numerical value of 16 first counter values, and process controller is handled, promptly activated the fluid organization of supply to holding basin irrigation beam body.Process controller continues to obtain reading with per 1/16 second interval from fluid level sensor.When the fluid level in holding the pond still was lower than predetermined altitude, process controller continued to obtain reading from fluid level sensor with per 1/16 second interval, and at each reading counter is carried out depreciation.Process controller continues the counter depreciation is made zero until counter values.
Process controller continues to obtain reading from fluid level sensor, handles the fluid organization of supply simultaneously to holding basin irrigation beam body.Fluid level in holding the pond becomes and is equal to or greater than predetermined altitude, and process controller obtains the indication fluid level when being equal to or greater than the reading of predetermined altitude from fluid level sensor, and process controller rises in value to counter at each such reading.In case process controller is the counter increment numerical value to 65, i.e. increment is to the numerical value greater than 64 second counter values, and organization of supply is not worked even process controller is handled fluid organization of supply fluid, stops holding the pond accommodating fluid.Process controller continues to obtain reading from fluid level sensor, and therefore to counter increment or depreciation.Fluid level in holding the pond is still on predetermined altitude the time, and process controller continues to obtain reading from fluid level sensor with per 1/16 second interval, and counter is rised in value.Process controller continues at each such reading counter to be rised in value, and reaches 80 until counter values.
According to this embodiment of the invention, process controller starts the fluid perfusion running up to counter depreciation to 15 just being handled the fluid organization of supply.In addition, in case process controller is finished the fluid perfusion running, process controller did not start next fluid perfusion running at least in three (3) seconds after a perfusion operates termination, because process controller rised in value counter to 65 numerical value before the running of termination fluid perfusion.In fact, process controller has the time at least three (3) seconds not start the fluid perfusion running begin the reading that obtains to indicate the fluid level of holding in the pond to be lower than predetermined altitude from fluid level sensor after.After the fluid perfusion running stops, when fluid level still is equal to or greater than predetermined altitude, process controller continues counter is rised in value, reach 80 numerical value until counter, make process controller after beginning the reading that from fluid level sensor, obtains to indicate the fluid level of holding in the pond to be lower than predetermined altitude, have the time at least four (4) seconds not start next fluid perfusion running.Thereby, according to this embodiment of the invention, process controller can not make the parts circulation of fluid organization of supply open and disconnect, even in the perfusion running or add hot fluid to hold in the process that produces steam humidifying under the situation that fluid in the pond experiences some eddy current also be like this.Certainly, first counter values can be selected different numerical value respectively with second counter values, so that the long or short time interval to be provided.In addition, process controller can obtain the fluid level reading with different predetermined time intervals.
Heater 1706 can be arranged on and hold Chi1701Chu, to add hot fluid in holding pond 1701.For example, heater 1706 can be arranged on and hold under the pond 1701, as shown in figure 17, holds fluid in the pond 1701 with heating.Process controller 1705 adjustable heater 1706 remove to heat the fluid that holds in the pond 1701, and for example, the fluid that will hold in the pond 1701 is heated to boiling point, to produce steam, make and preserve the cabinet humidification.
Temperature sensor (1707) can be arranged on and hold Chi1701Chu, holds the temperature in pond 1701 and prevents with measurement and hold the pond 1701 overheated damages that cause because of heater 1706 makes.Temperature sensor 1707 can with hold pond 1701 one, as shown in figure 17, or temperature sensor can be arranged on inner surface or the outer surface that holds pond 1701, holds the temperature in pond 1701 with measurement.Temperature sensor 1707 can comprise a plurality of sensors that are arranged on the surface of holding pond 1701 or are arranged to and hold pond 1701 one.Contain fluid if hold pond 1701, the temperature of holding pond 1701 should remain under the limiting temperature.But, become vacant if hold pond 1701, the temperature of holding pond 1701 temperature that can overstep the extreme limit.Temperature sensor 107 can detect these variations in temperature.
Process controller 1705 is communicated with temperature sensor 1707, makes process controller 1705 can monitor the temperature of holding pond 1701.When the temperature of holding pond 1701 when temperature sensor 1707 indication overstepped the extreme limit temperature, process controller 1705 can cut off hold pond heater 1706, to avoid or to reduce damage to other parts that hold pond 1701 and fluid perfusion system.In one embodiment of the invention, can use 450 limiting temperature.
Figure 18 shows the method for the fluid perfusion system that handles one embodiment of the invention.Process controller 1705 obtains fluid level reading (step S1) termly with a predetermined space from fluid level sensor 1704.According to each the fluid level reading that obtains from fluid level sensor 1704, the fluid level that process controller 1701 judges whether to hold in the pond 1701 is equal to or greater than first predetermined altitude (step 52).Process controller 1705 rises in value or depreciation to counter according to each the fluid level reading that obtains from fluid level sensor 1704.If the fluid level that the indication of fluid level reading is held in the pond 1701 is equal to or greater than predetermined altitude, process controller is to counter increment (step S3) so.If the fluid level reading indicates the fluid level of holding in the pond 1701 under predetermined altitude, 1701 pairs of counter depreciations of process controller (step S4).
When 1705 pairs of counters increments of each process controller or depreciation, process controller 1705 go back read-out counter numerical value (step S5, S6).If the numerical value of counter is less than first counter values (step S5), process controller 1705 can be handled fluid organization of supply 1703 with to holding pond 1701 accommodating fluids (step S7).If the numerical value of counter is equal to or greater than first counter values (step S5), process controller 1705 obtains fluid level reading (step S1) from fluid level sensor 1704.If the numerical value of counter is greater than second counter values (step S6), process controller 1705 handles fluid organization of supply 1703 to cut out fluid supply tube road 1702 and to stop holding pond 1701 accommodating fluids (step S8).If the numerical value of counter is equal to or less than second counter values (step S6), process controller 1705 obtains fluid level reading (step S1) from fluid level sensor 1704.
Process controller 1705 can be monitored the duration of perfusion running, with the running of other parts of guaranteeing fluid organization of supply 1703 and fluid perfusion system.For example, process controller 1705 starts timer in holding the perfusion operation in pond 1701, and monitors the time that is disappeared in the perfusion operation, finishes (step S9) to judge whether the perfusion running in the time limit at a preset time.Be less than or equal to the time limit scheduled time if hold the infusion time in pond 1701, process controller 1705 keeps the perfusion running, to holding pond 1701 accommodating fluids (step S11), process controller 1705 obtains fluid level reading (step S1) termly with predetermined space from fluid level sensor 1704 with continuation.If infusion time surpasses the time limit scheduled time, process controller 1705 can send a signal (step S10), for example device operator is given the alarm.This signal can be a vision, can be the sense of hearing also, or both haves both at the same time.But signal notifying operation person: the fluid level of holding in the pond does not arrive predetermined influx height, and the operator should check the fluid perfusion system, and for example, fluid supply tube road, fluid organization of supply or fluid level sensor or the like are to guarantee the running of system unit.For example, process controller 1705 can send information " tank is perfusion not, please check the supply of water ".Signal can continue until process controller 1705 and obtains to indicate the fluid level of holding in the pond 1701 to be equal to or greater than the reading of predetermined altitude from fluid level sensor 1704.In one embodiment of this invention, when process controller 1705 shut down or reboots, timer can reset.
Process controller 1705 can be communicated with (step S12) with temperature sensor 1707, with the temperature that judges whether to hold pond 1701 temperature that oversteps the extreme limit.Hold the reading that the temperature in pond 1701 is equal to or less than limiting temperature if process controller 1705 obtains indication from temperature sensor 1707, process controller 1705 continues to obtain fluid level reading (step S1) from fluid level sensor 1704.If the temperature of holding pond 1701 is greater than limiting temperature, process controller 1705 can send a signal (step S13), for example gives the alarm or the like to the operator.This signal can be a vision, can be the sense of hearing also, or both haves both at the same time.Signal notifying operation person holds pond 1701 may be vacant.For example, process controller can send information and " not have water, the float switch fault ".Process controller 1705 also can be turned off and holds pond heater 1706 (step S14).Process controller 1705 can be turned off under the situation of the numerical value of the state of not considering fluid level sensor 1704 and timer and holds pond heater 1706.Such processing reduces or prevents that damage to system unit, the result of damage from being, fluid level sensor 1704 becomes inoperative, can not indicate maybe that to hold pond 1701 be vacant.
In view of this specification or enforcement of the present invention disclosed herein, the skilled artisan in the art will come into plain view to other embodiments of the invention.Be noted that this specification and example only are used as example and use, the real scope and spirit essence of the present invention is limited by following claim.

Claims (20)

1. fluid perfusion system, it comprises:
At least one detects one and holds the sensor whether fluid level in the pond is equal to or greater than a predetermined fluid height; And
One process controller,
Wherein said process controller obtains reading at interval with a preset time from described at least one sensor, if indicating described fluid level to be equal to or greater than described predetermined altitude, described reading just a counter is rised in value, if described reading indicate described fluid level less than described predetermined altitude just to described counter depreciation, and
Wherein when the numerical value of described counter became above predetermined value, described process controller was handled a fluid organization of supply.
2. the system as claimed in claim 1, it is characterized in that, described predetermined value comprises one first counter values, wherein when described process controller makes described counter reduce under described first counter values, described process controller is handled described fluid organization of supply with to the described pond accommodating fluid that holds.
3. the system as claimed in claim 1, it is characterized in that, described predetermined value comprises one second counter values, wherein when described process controller made described counter increase on described second counter values, described process controller was handled described fluid organization of supply to stop the described pond accommodating fluid that holds.
4. system as claimed in claim 3, it is characterized in that, after through a scheduled time, even described process controller does not also rise in value to described second counter values to described counter, described process controller is handled described fluid organization of supply and is stopped the described pond accommodating fluid that holds.
5. system as claimed in claim 4 is characterized in that, when the described scheduled time disappeared, described process controller sent a signal.
6. the system as claimed in claim 1 is characterized in that, described at least one sensor comprises a float switch.
7. the system as claimed in claim 1 is characterized in that, described fluid organization of supply comprises:
One fluid supply line; And
One magnetic valve,
Wherein said process controller is handled described magnetic valve and is opened or closed described fluid supply tube road.
8. the system as claimed in claim 1 is characterized in that, described preset time comprises a time interval scope at interval.
9. the system as claimed in claim 1 is characterized in that, also comprises:
One is used for heating the described heater that holds the described fluid in pond; And
Be used to measure the described temperature sensor that holds the pond temperature,
Wherein said process controller obtains reading from described temperature sensor, and when the pond temperature surpasses a limiting temperature described heater is not worked when described holding.
10. system as claimed in claim 9 is characterized in that, described temperature sensor and the described pond of holding are one.
11. system as claimed in claim 9 is characterized in that, when holding the pond temperature and surpassing described limiting temperature, described process controller sends a signal when described.
12. one kind to holding the method for basin irrigation beam body, this method comprises following step:
Obtain the fluid level reading at interval with preset time, whether the fluid level of holding in the pond with judgement is equal to or greater than predetermined altitude;
If described fluid level reading is equal to or greater than described predetermined altitude, just to a counter addend;
If described fluid level reading is less than described predetermined altitude, just to described counter subtrahend; And
When the numerical value of described counter becomes above a predetermined value, just handle a fluid organization of supply.
13. method as claimed in claim 12, it is characterized in that, described predetermined value comprises first counter values, the step of wherein handling described fluid organization of supply comprises: when described process controller when described counter depreciation is to described first counter values, to the described pond accommodating fluid that holds.
14. method as claimed in claim 12, it is characterized in that, described predetermined value comprises one second counter values, the step of wherein handling described fluid organization of supply comprises: when described process controller when the increment of described counter is to described second counter values, stop the described pond accommodating fluid that holds.
15. method as claimed in claim 14 is characterized in that, also comprises following step:
After through a scheduled time,, stop the described pond accommodating fluid that holds even described process controller does not also rise in value to described second counter values to described counter.
16. method as claimed in claim 15 is characterized in that, also comprises following step:
When the described scheduled time disappears, send a signal.
17. method as claimed in claim 12 is characterized in that, the step that obtains the fluid level reading with preset time at interval comprises: obtain the fluid level reading in a predetermined time interval scope.
18. method as claimed in claim 12 is characterized in that, also comprises following step:
Heat the described pond of holding;
Measure the described temperature of holding the pond; And
When described temperature oversteps the extreme limit temperature, stop the heating of holding the pond to described.
19. method as claimed in claim 17 is characterized in that, also comprises following step:
When described temperature surpasses described limiting temperature, send a signal.
20. method as claimed in claim 12 is characterized in that, the step of handling a fluid organization of supply comprises: handle a magnetic valve, to open or close the fluid supply tube road.
CN02132198.1A 2002-06-14 2002-08-26 Humidity cabinet with automatic fluid filling system Expired - Lifetime CN1279324C (en)

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US10/171,381 2002-06-14
US10/171,381 US6670585B2 (en) 1999-09-28 2002-06-14 Humidity cabinet with automatic fluid fill system

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CN1279324C CN1279324C (en) 2006-10-11

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