CN1012103B - High-precision autocontrol system of constant temp. and humidity - Google Patents

Abstract

The present invention provides a constant temperature and humidity system with high precision. A temperature and humidity sensor comprises a temperature self control probe and a relative humidity self control probe; a temperature and humidity regulator comprises a humidity regulator which is composed of a dehumidifying machine and a humidifying machine, and a temperature regulator which is composed of a temperature lowering machine and a heating machine. According to the condition that air conditioning room temperature and the humidity deviate from control values, the present invention can respectively regulate temperature or humidity, wherein the condition is sensed by the temperature and humidity sensor; the present invention is matched with an automatic gate, an axial flow fan, a fresh air input automatic controller, a buffer plate and a small fan for indoor air circulation so that the present invention enhances the relative humidity control precision, decreases the temperature and humidity fluctuation, reduces the energy consumption and prolongs the service life of machine sets.

Description

High-precision autocontrol system of constant temp. and humidity

The present invention relates to a kind of apparatus of air conditioning, particularly relate to a kind of high accuracy, the low energy consumption ground control system of the temperature and humidity of control air conditioning chamber automatically.

Current, along with science and technology development, the required precision of test and measuring work is improved day by day, this just not only need have sound means of testing, and the test environment of standard need be arranged, and to get rid of the influence of extraneous factor, guarantees the correctness and the reliability of test data.Thereby for some test and measuring place, the regulation humiture must reach iso standard or GB standard.That is to say, must set up a high-precision thermostatic constant wet control system.

The temperature controlling range of domestic existing thermostatic constant wet control system is 20～25 ℃, worst error ± 1 ℃, and the relative humidity control range is 50～70%rh, worst error ± 10%rh.For the standard testing analysis room of the strict paper industry of humiture, the GB standard is a temperature (20 ± 2) ℃, and relative humidity (65 ± 2) %rh, iso standard are temperature (25 ± 1) ℃, relative humidity (50 ± 2) %rh.Therefore, analyze theoretically, domestic existing thermostatic constant wet control system will make and reach GB standard and iso standard in the air conditioning chamber, from the temperature control angle, be not in-problem, but from controlling wet angle, though its relative humidity control range can satisfy the requirement of two standards, it is too big that yet control accuracy differs, it can only reach setting controlling value ± 10%rh at present, reach two prescribed by standard the setting controlling value ± 2%rh is very difficult, this weakness is determined by the structure and the operating mechanism that have thermostatic constant wet control system itself now, the effect of drying of the refrigeration system of this control system landing simultaneously gentleness, system is in running, when room temperature has reached control when requiring, if relative humidity is higher than control criterion, then must continue to open refrigeration system dries, and when drying, temperature also descends, then system must use electrical heating to come equilibrium temperature again, equally, room temperature is higher than control criterion if indoor humidity has reached the control requirement, then still need to lower the temperature by refrigerating system, and humidity also descends inevitably simultaneously, drop to control criterion when following until temperature and humidity in the refrigerating system effect, add gentle electrode humidifier humidification by electric heater again.This shows that the adjusting of the temperature and humidity of this thermostatic constant wet control system pins down influence rather than carry out, thereby make the humiture fluctuation of air conditioning chamber separately very big mutually, influences control accuracy.Iso standard to the requirement of humiture fluctuation is: in 24 hours any two in independent 30 minutes, the difference of the mean value of temperature can not be above 0.5 ℃, the difference of the mean value of relative humidity can not surpass 1%rh, and existing thermostatic constant wet control system is inaccessiable far away.

In addition, existing thermostatic constant wet control system to add the control of gentle humidification be to pass through sensor, the difference that generally is actual humiture of experiencing with thermistor or the made temperature-sensing probe of wet and dry bulb electric contact thermometer and the standard atmosphere that requires control changes the bridge circuit output signal, after signal amplification circuit amplifies, make relay produce action, automatically heat or humidification, cooling and the control of drying then are not synchronously directly to carry out automatic control according to the actual humiture in the air conditioning chamber and the difference of the standard atmosphere that requires control, but indirectly by variable expansion valve pressure, make the pressure controller output signal control magnetic valve, thus the control refrigeration system.On the other hand, according to changes of seasons, select the cooling and the dehumidification ability of refrigeration system by three retaining selector switches, in the winter time, selector switch is generally dialled " 0 " position, and refrigeration system is not worked, whole system can only add gentle humidification, if unusual moist phenomenon occurs, cause the air-conditioning indoor relative humidity to be higher than control range, also can't dry; In summer; selector is generally dialled " II " position; refrigeration system is ceaselessly moved continuously and is lowered the temperature, dries; if humiture phenomenon on the low side occurs; can only by heat, humidification comes balance; add gentle cooling or humidification and the inconsistency that dries simultaneously owing to system occurs, wasted electric energy greatly through regular meeting, and the loss of quickening unit.And, because refrigerating system ceaselessly moves, just constantly need cooling water, so, or water is run off in a large number, water consumption is big, or utilizes pumping that water is recycled, though saved the water yield, has consumed electric energy.At spring and autumn, selector is generally dialled " I " position, makes refrigerating system reduce half cooling power, and the control of its reducing temperature and humidity still is not synchronous automatic control.

In addition, adopt the air conditioning chamber of existing thermostatic constant wet control system, cause the indoor temperature and humidity fluctuation for fear of bringing into the air of outdoor high temperature, low temperature, high humidity or low humidity indoor, taked to reduce the measure of new wind input.So, working long hours in the air conditioning chamber just can unhappy discomfort.

In sum, existing constant temperature and humidity system can not be done full automatic control respectively to the temperature and humidity of air conditioning chamber, and humiture pins down influence mutually in adjustment process, cause fluctuation, and control accuracy is poor.Secondly, in use because irrational regulation mechanism makes unit operation frequent, power consumption is big in this system, and the unit loss is fast, influences lifetime of system, and uses air conditioning chamber's air of this system impure and fresh, and noise is also big.

Thereby, the object of the present invention is to provide a precision and thermostatic constant wet control system highly sensitive, that fluctuation is little, to satisfy the needs of setting up standardized test analysis research department, laboratory, measuring room, precision instrument workshop etc.

Another object of the present invention is to reasonably control automatically the operation of the unit of thermostatic constant wet control system,, prolong the life-span of unit to reduce the energy consumption of system.

The object of the present invention is achieved like this, high-accuracy and constant constant temperature and humidity robot control system(RCS) of the present invention and general constant temperature and humidity system comprise Temperature Humidity Sensor, signal amplification circuit, relay and thermo hydrograph regulator equally.But above-mentioned Temperature Humidity Sensor is divided into independently temperature-controlled probe and relative humidity automatic control probe, and above-mentioned thermo hydrograph regulator is by the humidistat that comprises dehumidifier and humidifier and comprise that the thermoregulator of cooling machine and heating machine forms.Relative humidity automatic control probe, signal amplification circuit, relay and humidistat have been formed independently relative humidity automatic control part; And temperature-controlled probe, signal amplification circuit, relay and thermoregulator have been formed independently temp autocontrolled part.Wherein, relative humidity automatic control probe changes the work of three photoelectric tubes of shadow shield control of stretch flexible drive disk assembly of drive hair and interlock with it by the corresponding humidity of hair; Temperature-controlled probe is made up of three electric contact thermometers, they are provided with upper limit contact, central contact and lower limit contact corresponding to required control temperature respectively, the mercury of three electric contact thermometers corresponding to variations in temperature lifting with contact upper limit contact, central contact or lower limit contact.Three photoelectric tubes connect signal amplification circuit, relay and a humidistat separately successively, and three contacts connect a signal amplification circuit, relay and thermoregulator separately successively.Above-mentioned a plurality of relay is controlled the running status of dehumidifier, humidifier, heating machine and cooling machine respectively as switch, thereby makes the humiture of air conditioning chamber reach the standard value of desired control.

In addition, for control accuracy and the sensitivity that improves system, reduce the humiture fluctuation of air conditioning chamber, uniform many little blower fans through speed governing are as the room air recycle unit in the air conditioning chamber; And the sensor of system of the present invention placed in the porous box body, in this box body, also being equipped with aerofoil fan by step-down control, it can blow to temperature-controlled probe and humidity automatic control probe with stable wind speed at any time with room air; Adorn a blower fan respectively in dehumidifier, humidifier, cooling machine and heating machine discharge pipe separately, these blower fans are provided with the airduct automatically-controlled door separately with the pipe end that the total blast pipe that leads to the air conditioning chamber links to each other, to avoid the mutual interference mutually and the hysteresis effect of temperature adjustment and damping; And at the air outlet of the total blast pipe that leads to air conditioning chamber dress with buffer board, make it more effectively to reduce the fluctuation of humiture.

In addition, on the cooling water source that the cooling machine in the adjustment machine is used magnetic valve is housed, the relay Synchronization Control that it is opened by control cooling machine, when the cooling machine is opened, magnetic valve is opened simultaneously, is not continuous circulation so cooling water enters cooling water, but adds as required.Thereby saved the energy.

Constant temperature and humidity automatic control system of the present invention is compared with existing thermostatic constant wet control system, and its advantage is: 1. the control accuracy of relative humidity improves, reach set controlled humidity ± 2%rh, meet GB standard and iso standard.2. the fluctuation of control humiture reduces, and makes it to meet ISO humiture fluctuation standard; 3. the each point humiture is even in the air conditioning chamber; 4. the humiture balancing speed is fast, just can make the humiture of air conditioning chamber reach control criterion in 15 minutes; 5. because the reasonable use of unit has reduced energy consumption, compare with existing thermostatic constant wet control system, saves energy is more than 70%, and prolongs unit service life; 6. system is equipped with the equipment of the new wind input of automatic adjusting, makes the air in the air conditioning chamber keep comfortable, the unlikely again fluctuation that causes humiture; 7. system takes Automatic Control, has exempted the trouble that existing thermostatic constant wet control system must be stirred selector switch and variable expansion valve pressure with season or extraneous climate change, management and easy to use; Since system control rationally, thereby thereby its thermoregulator comparable now with the corresponding cost that reduces system of the power reduction of equipment, and whole system do not adopt the former device of any import in designing, so system's manufacturing and installation cost are lower.

Below in conjunction with accompanying drawing constant temperature and humidity automatic control system of the present invention is done detailed explanation.

Fig. 1 is the structure principle chart of constant temperature and humidity automatic control system of the present invention.

Fig. 2 a and 2b are the structured flowcharts of constant temperature and humidity automatic control system of the present invention.

Fig. 3 is the box body internal structure schematic diagram that Temperature Humidity Sensor and aerofoil fan are housed.

Fig. 4 is the outline drawing of the box body of Fig. 3.

Fig. 5 is the air flow figure of system of the present invention.

Fig. 6 a is the structural representation of horizontal airduct automatically-controlled door.

Fig. 6 b be the A of Fig. 6 a to view, it shows the closed condition of horizontal airduct automatically-controlled door.

Fig. 6 c is the schematic diagram that horizontal airduct automatically-controlled door is in opening.

Fig. 7 a is the structural representation of vertical airduct automatically-controlled door.

Fig. 7 b be the B of Fig. 7 a to view, it shows the closed condition of vertical airduct automatically-controlled door.

Fig. 7 c is the schematic diagram that vertical airduct automatically-controlled door is in opening.

Referring to Fig. 1, high accuracy constant temperature and humidity automatic control system of the present invention and existing thermostatic constant wet control system comprise Temperature Humidity Sensor 1, signal amplification circuit 2, relay 3 and thermo hydrograph regulator 4 equally.Temperature Humidity Sensor 1 perception and react the variation of temperature and humidity in the air conditioning chamber delicately produces control signal, controls the running status of thermo hydrograph regulator 4 respectively through the conversion of amplification and light and/or electricity, machine, thereby reaches the purpose of automatic control.

Be the structured flowchart of constant temperature and humidity automatic control system of the present invention shown in Fig. 2 a and the 2b, wherein Temperature Humidity Sensor 1 comprises temperature-controlled probe 1a and relative humidity automatic control probe 1b; Thermo hydrograph regulator 4 is made up of discrete humidistat that comprises dehumidifier 4a and humidifier 4b and the thermoregulator that comprises heating machine 4c and cooling machine 4d.Wherein the application number submitted on March 20th, 87 by the present inventor of the automatic control section of relative humidity be respectively 87102405 and 87205638, title has been for having done detailed description in the application for a patent for invention of " relative humidity automatic control system " and the utility application, the structure of this system is corresponding to the part that dotted line encloses among Fig. 2.Here make simple explanation: the structure of relative humidity automatic control probe 1b is shown by Fig. 3, it comprises base plate 5, be fixed on the hair length adjuster 10 on base plate 5 tops, be fixed on the flexible drive disk assembly 20 of hair of base plate 5 bottoms, three the juxtaposed logical light aperture 16a in base plate 5 middle parts, 16b and 16c, be positioned at base plate 5 fronts and the back side and cross three opposed one by one three photoelectric tube 17a of logical light aperture, 17b, 17c and three small light source (not shown), two ends are separately fixed at the hair 15 on the flexible drive disk assembly 20 of hair length adjuster 10 and hair, and and drive disk assembly 20 interlocks be positioned at anti-dazzling screen 18 between logical light aperture and photoelectric tube.Each photoelectric tube 17a, 17b or 17c are connected with a signal amplification circuit 2a, 2b or 2c respectively, and these three signal amplification circuits are equipped with relay 3a, 3b and 3b ', 3c respectively, be connected on the humidistat, control the running status of dehumidifier 4a and humidifier 4b as switch respectively.When ambient humidity in the air conditioning chamber 8 changes, hair 15 is corresponding flexible, make anti-dazzling screen 18 displacements cover different photoelectric tube 17a, 17b or 17c by machine driving, the optical signal that enters in it is changed, the optical signals photoelectric tube of this variation converts the signal of telecommunication to, finishes control to the running status of dehumidifier or humidifier by relay after connected signal amplification circuit amplifies.

The structure that has also shown temperature-controlled probe 1a in Fig. 3, it is by three electric contact thermometer 21a, 21b, 21c and put and constitute.Lower limit contact 22a, central contact 22b and upper limit contact 22c that they are provided with required control temperature in the air conditioning chamber respectively see Fig. 2.When the air-conditioning indoor temperature was lower than lower limit contact 22a, temperature-controlled probe 1a exported the signal of heating, and this signal opens heating machine 4c by signal amplification circuit 2d and relay 3d automatically.When the mercury that is elevated to electric contact thermometer 21a gradually when temperature touched lower limit contact 22a, temperature-controlled probe 1a still kept the output signal of heating, and heating machine 4c remains in operation.When the mercury that is elevated to electric contact thermometer 21b when indoor temperature under heating machine 4c continuous action touches central contact 22b, temperature-controlled probe 1a output the stopping signal of heating, effect by signal amplification circuit 2e and 2d and relay 3d is closed warmer 4c automatically.

Another kind of situation, if when the temperature in the air conditioning chamber is higher than upper limit contact 22c, temperature-controlled probe 1a exports cooling signal, this signal opens cooling machine 4d by signal amplification circuit 2e and relay 3f automatically.When the mercury that is reduced to electric contact thermometer 21c when temperature touched upper limit contact 22c, temperature-controlled probe 1a still kept exporting cooling signal, and cooling machine 4d remains in operation.When the mercury that drops to electric contact thermometer 21b when indoor temperature under cooling machine 4d continuous action touches central contact 22b, temperature-controlled probe 1a just exports and stops cooling signal, effect by signal amplification circuit 2e and 2f and relay 3e is closed cooler 4d automatically.

By Fig. 2 and Fig. 5 as seen, in dehumidifier 4a, humidifier 4b, heating machine 4c and cooling machine 4d discharge pipe 11 separately blower fan 5 is housed respectively, these discharge pipes 11 are provided with airduct automatically-controlled door 6 respectively with the pipe end that the total blast pipe 7 that leads to air conditioning chamber 8 links to each other.And the air outlet of total blast pipe 7 is equipped with buffer board 19, so that the fluctuation of humiture in the unit interval of air conditioning chamber 8 reduced.And uniform many little blower fans 9 that reduce wind speed through pressure regulation so can improve the uniformity of indoor humiture everywhere, and make indoor calm sensation as the room air recycle unit in air conditioning chamber 8, conform to strict testing standard condition.In addition, new wind in the air conditioning chamber 8 is supplied with by the fan 12 that is loaded on total inlet pipe 7 inlets, in the present invention, the running status of fan 12 is by new wind input time automatic controller 13 controls of their configurations, in order to the new wind input of automatic adjusting, and, an airduct automatically-controlled door 6a also is set in fan 12 the place aheads, so make both to have kept with fresh air comfortable in the air conditioning chamber 8, do not influence temperature and humidity control again.

And, can see also that from Fig. 2 the cooling water of cooling machine 4d is from cooling water source 14, it is by magnetic valve 15 controls, the relay 3e Synchronization Control that this magnetic valve 15 is opened by control cooling machine 4d, only when cooling machine 4d started as required, magnetic valve 15 was just opened, and cooling water just circulates, thereby water consumption diminishing greatly, and compare with recycling cooling water, though consumed some water, saved electric energy greatly.

Fig. 3 has shown that the above-mentioned Temperature Humidity Sensor that comprises temperature-controlled probe 1a and relative humidity automatic control probe 1b is placed in the schematic diagram in the box body 25.Aerofoil fan 26 by step-down control also is housed in this box body 25.The profile of box body 25 has intensive air vent 28 on the wall in its two side and respective shaft flow fan 26 fronts as shown in Figure 4.So, aerofoil fan 26 just can blow to Temperature Humidity Sensor 1 with stable wind speed at any time with room air, thereby can improve its sensitivity and precision.Can be laterally in the front of box body 25 or vertically arrange six indicator lamps 30, they are connected on each corresponding relay, and it act as the upper limit that display system intuitively is in required control temperature and humidity, standard value, still lower limit.

Above-mentioned airduct automatically-controlled door 6 can be made into horizontal or vertical two kinds of structures.Fig. 6 a-6c is the horizontal type structure schematic diagram.Seeing Fig. 6 a, is the middle supporting-point 32 that correspondence is arranged in discharge pipe 11 opposed two sides of rectangle in the cross section.The hinge type airduct automatically-controlled door fixed part 33 that comprises rotating shaft 34 and fin 35 is positioned at discharge pipe 11, and its rotating shaft 34 two ends are fastened on two supporting-points 32.Airduct automatically-controlled door 6 is divided into two fans, is separately fixed on the fin 35 of rotating shaft 34 both sides of this fixed part 33.When the discharge pipe 11, two fan automatically-controlled door 6 horizontal and discharge pipe 11 is closed are shown in Fig. 6 b when calm.This moments two, fan automatically-controlled doors 6 were to locate by the soft block 36 that is fixed on discharge pipe 11 walls and be positioned at the automatically-controlled door downside of horizontal.As wind when the discharge pipe 11, two fan automatically-controlled doors 6 just in Fig. 6 c of wind-force effect lower edge direction shown in the arrow 34 oppositely rotate up and open into the V font around the shaft.And end when passing through when becalming, two fan automatically-controlled doors 6 fall naturally again and close discharge pipe 11.

Fig. 7 a-7c is vertical airduct automatic door structure schematic diagram.For the convenience of describing, the identical member of member all and among Fig. 6 a-6c is all represented with same label among the figure.See Fig. 7 a, in the cross section is discharge pipe 11 centres, opposed two sides of rectangle and the supporting-point 32a and 32 that respectively there is correspondence the upper end, hinge type airduct automatically-controlled door fixed part 33a and 33 rotating shaft 34a and 34 two ends are fastened on respectively on these two supporting-point 32a and two supporting-points 32, fan automatically-controlled door 6 is divided into two fans equally, the fin 35a that is separately fixed at rotating shaft 34a one side of fixed part 33a go up and the fin 35 of rotating shaft 34 1 sides of fixed part 33 on.Each fixes a soft block 37 on the position of lower end, the airduct two side correspondence that supporting-point 32a and 32 are set, it and rotating shaft 34a and 34 be centered close on the straight line that becomes with the wall of discharge pipe 11 less than 90 ° of angles, when the discharge pipe 11, the position of two fan automatically-controlled doors 6 is shown in Fig. 7 b when calm; Their lower end is shelved on respectively on rotating shaft 34 and the soft block 36, thereby discharge pipe 11 is closed.And as wind when the discharge pipe 11, two fan automatically-controlled doors 6 just in Fig. 7 c of wind-force effect lower edge direction shown in the arrow respectively around the shaft 34a and 34 rotate in the same way and open.End when passing through when becalming, two fan automatically-controlled doors 6 fall naturally again and close discharge pipe 11.

Acting among Fig. 5 of airduct automatically-controlled door 6 embodies obviously.Because dehumidifier 4a humidifier 4b, adorn a blower fan respectively in heating machine 4c and the cooling machine 4d discharge pipe 11 separately, and airduct automatically-controlled door 6 is contained in the pipe end that these discharge pipes 11 link to each other with the total blast pipe 7 that leads to air conditioning chamber 8 respectively, thereby only when these machine operations, the airduct automatically-controlled door of their correspondences is just opened, otherwise close, so just prevent that air is at these machine intercropping partial circulatings, or extraneous new wind enters thermo hydrograph regulator, or air blows back into thermo hydrograph regulator from total blast pipe 7, its effect is to guarantee the air direction circulation shown in the arrow in Fig. 5 successfully in a word, thereby and can make machine once isolating when out of service and total blast pipe 7 air conditioning chambers 8; Help avoiding the influence of hysteresis effect, so just guarantee effectively that precision height, the fluctuation of constant temperature and humidity automatic control system control humiture of the present invention is little.

Claims (2)

1, a kind of constant temperature and humidity automatic control system of indoor temperature and humidity, it comprises the Temperature Humidity Sensor of being made up of temperature-controlled probe 1a and relative humidity automatic control probe 1b 1, signal amplification circuit 2, relay 3 and the thermo hydrograph regulator of forming by thermoregulator and humidistat 4, also comprise air conditioning chamber's fresh air supply device, above-mentioned humidistat comprises dehumidifier 4a and humidifier 4b, the said temperature adjuster comprises heating machine 4c and cooling machine 4d, above-mentioned relative humidity automatic control probe 1b comprises hair 15, hair length adjuster 10, shadow shield 18 and three photoelectric tube 17a of flexible drive disk assembly 20 of hair and interlock with it, 17b, 17c, above-mentioned three photoelectric tubes link to each other with humidistat successively with an above-mentioned signal amplification circuit and with above-mentioned relay separately, it is characterized in that, said temperature automatic control probe 1a comprises three electric contact thermometer 21a, 21b, 21c, they are provided with the lower limit contact 22a of required control temperature respectively, central contact 22b and upper limit contact 22c, above-mentioned three contact 22a, 22b, 22c links to each other with thermoregulator successively with an above-mentioned signal discharge circuit and with above-mentioned relay separately, above-mentioned dehumidifier 4a, humidifier 4b, heating machine 4c and each comfortable its discharge pipe 11 end of cooling machine 4d are equipped with blower fan 5 respectively, each discharge pipe 11 is provided with airduct automatically-controlled door 6 respectively with the pipe end that total blast pipe 7 of the air conditioning chamber 8 of leading to required temperature and humidity control is connected, and, above-mentioned Temperature Humidity Sensor 1 is positioned in the box body 25, also is equipped with an aerofoil fan 26 by step-down control in above-mentioned box body 25, on the wall in the two side of box body 25 and respective shaft flow fan 26 fronts, have intensive air vent 28.

According to the described constant temperature and humidity automatic control system of claim 1, it is characterized in that 2, it also comprises many little blower fans 9 that reduce wind speed through pressure regulation that are distributed in the air conditioning chamber 8.

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