CN1188685A - Refrigerant temp. control device for freezing type air drier - Google Patents
Refrigerant temp. control device for freezing type air drier Download PDFInfo
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- CN1188685A CN1188685A CN97100280A CN97100280A CN1188685A CN 1188685 A CN1188685 A CN 1188685A CN 97100280 A CN97100280 A CN 97100280A CN 97100280 A CN97100280 A CN 97100280A CN 1188685 A CN1188685 A CN 1188685A
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Abstract
A cold medium temp controller for freeze-type air drier is composed of three temp sensors, controller and two fans, and can stably control air temp at inlet and cold medium temps at outlet of condenser and end of cold medium return tube, so ensuring stabilized temp of cold medium and high quality of output air. The service life of fan is elongated.
Description
The present invention is a kind of refrigerated type air dryer refrigerant temperature control device, and particularly a kind of dried-air drier refrigerant temperature that can make keeps stable control device.
General refrigerated type air dryer is generally all stablized the device of controlling refrigerant temperature at present, so refrigerant temperature is wayward, causes the air themperature instability of output.Because the change of environment temperature, the air of inlet very is hard to keep stable, and the temperature of the required processing of refrigerant and load form significant difference, and it is excessive to cause refrigerant temperature to change, and has influence on the air quality after the processing, and then jeopardizes the service life of cold medium compressor.
Fig. 1 is known refrigerated type air dryer air dry run schematic diagram.This is a kind of mechanical refrigerant temperature control form, shows its numerical value by refrigerant evaporation Pressure gauge 21, and be used to adjust the rotating speed of fan motor 11 that reach required temperature value when making refrigerant through condenser 13, in fact, this control is very not good.Because this control can not obtain thinner control numerical value, the wage adjustment of choosing is whole also can't adjust precision, and the inconvenience that seems suitable.
Fig. 2 is the schematic flow sheet of the known refrigerated type air dryer of another kind.Its refrigerant temperature control is to utilize a temperature-sensitive sticker 44 to be installed in the end of refrigerant return pipe 37, be used to measure refrigerant and make residual temperature after the heat exchange through evaporimeter 36 and air, and making control module 41 can control the rotating speed of fan motor 31, temperature can be stablized when realizing refrigerant by condenser 33 outputs.But this form also has its not thorough place, because refrigerated type air dryer is to do heat exchange by the temperature difference of the temperature of refrigerant and air, in case air temperature variations, temperature when refrigerant refluxes is also along with variation, and temperature-sensitive sticker 44 passes to control module 41 with measured temperature value, and this control module then instructs fan motor 31 constantly to start, the action of acceleration and stop, make fan motor easy reduction of service life, Shu Chu dry air quality is very unstable yet simultaneously.
Fig. 3 also is a kind of schematic flow sheet of known refrigerated type air dryer.Its temperature control system is to install first temperature-sensitive sticker 63 at the end of refrigerant return pipe, install second temperature-sensitive sticker 64 at the end of air precooler 65, air themperature by 64 sensings reaches in the control module 61, control the rotating speed of second fan motor 66 by this control module, and the refrigerant temperature of the refrigerant return pipe 57 that first temperature-sensitive sticker 63 is predicted passes to control module 61.Thereby control the rotating speed of first fan motor, make refrigerant temperature keep stable.The control device of this form than the given device progress of Fig. 2 some, but also there is weak point, because second temperature-sensitive sticker 64 is installed in the end of air precooler 65, when measuring too high temperature of air, when signal passes to control module and instructs second fan starting cooling, high temperature air has run to the process of carrying out heat exchange with refrigerant in the vaporization chamber 56, temperature drift in the time of must influencing the refrigerant backflow, and the high refrigerant temperature value that sensor 63 records makes 51 runnings of control module 61 instruction fan motors, reduce the refrigerant output temperature, yet, because the upper air temperature degree that second temperature-sensitive sticker measures makes the moving commentaries on classics of second fan motor reduce air themperature again, at this moment at evaporimeter exchange taking place has reduced refrigerant temperature again, thereby making control module instruct two fan motor stops to move respectively, changes new signal, for a moment, the situation of beginning takes place again, two disconnected mutually startings of fan motor, so, fan motor starting stop is too frequent, to cause the damage of fan motor, shorten the service life of fan.In addition, because the signal that control module 61 is accepted variation is too frequent, and the mechanical signal speed difference of the electric signal of control module and fan action is too big, the signal disorder that motor is accepted, often cause misoperation easily, make the air quality of output more unstable, and cause the damage of equipment.
From above-mentioned three diagrams and explanation, can recognize that the refrigerant temperature control system of existing refrigerated type air dryer is all not satisfactory, all there is problem separately respectively, and the stability of the air quality of influence output, the also fault rate of influence equipment and the service life that shortens fan.
The objective of the invention is to overcome the problem that known freezing air drier refrigerant temperature control exists, new refrigerant temperature control system is proposed, with the stable control that realizes refrigerant temperature with air quality is stable, the steady running of refrigerated type air dryer and service life of improving equipment.
Major technique characteristics of the present invention are that three temperature control points are set in the refrigerant temperature control system, and employing microprocessor controller, form CPU, and sensing circuit, phase place checking circuit, key control circuit, circuits for triggering, optically coupled circuit, power control member output circuit are set in this unit.And link with first, second fan motor and compressor.
Be each relevant figure of paying and figure number explanation thereof below:
The refrigerated type air dryer schematic flow sheet that Fig. 1 is known.
Another known refrigerated type air dryer schematic flow sheet of Fig. 2.
Fig. 3 is a known refrigerated type air dryer schematic flow sheet again
Fig. 4 refrigerated type air dryer schematic flow sheet of the present invention.
Fig. 5 microprocessor controller circuit box of the present invention schematic diagram.
10,30,50 compressors, 41,61 control modules
11,31 fan motors, 63,87 first temperature-sensitive stickers
70,98 compressors, 64,86 second temperature-sensitive stickers
2,32,52 fans 65,84 precoolers 67,72,83 fans 81 the 3rd temperature- sensitive sticker 13,33,53,73 condensers 51,71 first fan motors 14,34,54,74 filters, 97 first fan motors 15,35,55,75 capillaries 66,82 second fan motors 16,36,56,76 evaporimeters, 99 second fan motors 19,39,59,79 air intakes, 85 microprocessor controllers 20,40,60,80 air outlet slits, 90 CPU 17,37,57, circuit 23 is spattered in 91 senses of 77 refrigerant return pipes, 43,65,88 separators, 92 phase place checking circuits 21, refrigerant evaporation Pressure gauge 93 key control circuit 22,42,62 air outlet slit Pressure gauges, 94 circuits for triggering 18,38,58,78 automatic water traps, 95 optically coupled circuits, 44 temperature-sensitive stickers, 96 power control member output circuits
By explanation, can understand the invention feature and know-why and practical significance thereof to accompanying drawing 4 of the present invention and accompanying drawing 5.
Fig. 4 shows that 3 temperature-sensitive stickers are installed in the following column position of dried-air drier system respectively: first temperature-sensitive sticker 87 is installed in the exit of the condenser 73 of refrigerant, second temperature-sensitive sticker 86 is installed in the end of refrigerant return pipe 77, and the 3rd temperature-sensitive sticker 81 is installed near the air intake place 79 of front end of air precooler 84.Three sensing temperature devices all are connected on the microprocessor controller, after the temperature value signal that is sensed is passed to controller, send instruction indication first fan motor and second fan motor startup running respectively and adjust rotating speed or the stop running through computing, the effect of performance adjustment control refrigerant temperature.
When the running commercial weight of refrigerant temperature control device of the present invention is the refrigerated type air dryer entry into service, the refrigerant of being sent by compressor transfers to condensator outlet through condenser, first temperature-sensitive sticker 87 that is positioned at this exit records the temperature of high-pressure liquid refrigerant, and temperature value signal is transferred to record storage in the microprocessor controller 85.Second temperature-sensitive sticker 86 is installed in the end of refrigerant return pipe, measured refrigerant temperature is the low pressure gaseous coolant that process evaporimeter and air have carried out heat exchange, and absorbed airborne heat and improved the refrigerant temperature of temperature, this temperature value is passed in the microprocessor controller confession processing computing and contrast through 86.Whether this contrast can determine to instruct first fan starting cooling to turn round.The air themperature value that is installed in the firm inlet that the 3rd temperature-sensitive sticker 81 at air intake place will record is passed in the microprocessor 85, certain value temperature reduced value is set in the control circuit of microprocessor, for comparing with the intake air temperature value, this value must fix on a certain normal temperature value, as fixes on below 45 ℃.When the intake air temperature is higher than definite value, processor will instruct starting of second fan motor or increase rotating speed to implement to reduce the work of air themperature.So just each link that influences refrigerant temperature with dryer system all is added on control, intake air can be realized the definite value temperature after control, first and second temperature sensings and control can make the good control of the refrigerant temperature value of condensator outlet place and return duct end and form in the certain value, make all very stable of the air themperature of output and air quality.
Fig. 5 is the circuit combination block schematic diagram of the microprocessor controller of temperature control equipment of the present invention.Whole figure is a microprocessor controller 85.It by each temperature value of a sensing circuit 91 input to CPU 90 as operational data, 93 of key control circuit can be set required temperature value and offer processing unit 90, processing unit 90 is according to compare computing and the instruction after the computing sent to circuits for triggering 94 and optically coupled circuit 95 of each numerical value that imports into, and remove to trigger power control member output circuit 96, control the running and the rotating speed of first fan motor and second fan motor respectively.
In sum, the present invention has following many advantages:
1, second temperature-sensitive sticker is installed in the air intake place, can record rapidly the air themperature value that enters, and makes Microprocessor controller is the running of control second fan motor in time, to keep equilibrium temperature, the reality of intake air Upper is that stable control lays a solid foundation from the refrigerant temperature that evaporimeter refluxes.
2,, can control the temperature of refrigerant and air respectively, thereby guarantee the stable of refrigerant temperature by means of each thermal detector supercooling temperature, the overtemperature after the heat exchange of low pressure gaseous coolant and the temperature that enters air from the porch of sensing high-pressure liquid refrigerant respectively.Thereby can guarantee the stable high-quality of the air quality exported.
3, because microprocessor controller can be handled signal and the accurately computing that each thermal detector transmits fast rapidly, accomplish stable each fan running of control, make motor misoperation can not take place, more can not produce signal disorder, frequent switch fan motor, guarantee the normal operation of motor, prolong the service life of motor.
In a word, the refrigerant temperature control device of refrigerated type air dryer of the present invention is stablized much accurately than existing refrigerant temperature control with drier, not only Shu Chu air quality is stablized good, and the running of whole device system is stable, and improve the service life of fan motor.
Claims (1)
- A kind of refrigerated type air dryer refrigerant temperature control device, by temperature-sensitive sticker, fan and microprocessor controller are formed, it is characterized in that described temperature-sensitive sticker forms by three, be separately positioned on refrigerant condensator outlet place, paying of the end of refrigerant return pipe and air intake place is near, they connect with microprocessor respectively, each temperature signal can be by the comparison calculation of microprocessor controller, the fan that instruction in time is installed in the fan of air precooler adjacency and is installed in refrigerant condenser adjacency starts timely, steady running and closing.In the composition of described microprocessor controller, key circuit is set,, the temperature of intake air is kept in this definite value scope so that the certain value temperature is set, stable with the maintenance that guarantees refrigerant temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97100280A CN1068241C (en) | 1997-01-22 | 1997-01-22 | Refrigerant temp. control device for freezing type air drier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97100280A CN1068241C (en) | 1997-01-22 | 1997-01-22 | Refrigerant temp. control device for freezing type air drier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1188685A true CN1188685A (en) | 1998-07-29 |
| CN1068241C CN1068241C (en) | 2001-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97100280A Expired - Fee Related CN1068241C (en) | 1997-01-22 | 1997-01-22 | Refrigerant temp. control device for freezing type air drier |
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| Country | Link |
|---|---|
| CN (1) | CN1068241C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104424705A (en) * | 2013-08-28 | 2015-03-18 | 富士电机株式会社 | Vending machine |
| CN105148301A (en) * | 2015-08-17 | 2015-12-16 | 宁波市双嘉仪器有限公司 | Constant-temperature and constant-humidity device for storing medicinal materials |
| CN114367175A (en) * | 2021-12-20 | 2022-04-19 | 深圳豪达尔机械有限公司 | Freezing type drying machine and control device thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2174249Y (en) * | 1992-09-03 | 1994-08-17 | 煜丰企业有限公司 | Freezing air dryer |
| CN2197111Y (en) * | 1994-05-30 | 1995-05-17 | 杨福嘉 | Adjutable controllor of colling compressing air drier |
| CN2204637Y (en) * | 1994-10-07 | 1995-08-09 | 詹勋 | Compressed air drying apparatus by refrigeration |
| CN2240697Y (en) * | 1995-10-09 | 1996-11-20 | 李晋华 | Freezing type air drier controller |
-
1997
- 1997-01-22 CN CN97100280A patent/CN1068241C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104424705A (en) * | 2013-08-28 | 2015-03-18 | 富士电机株式会社 | Vending machine |
| CN105148301A (en) * | 2015-08-17 | 2015-12-16 | 宁波市双嘉仪器有限公司 | Constant-temperature and constant-humidity device for storing medicinal materials |
| CN114367175A (en) * | 2021-12-20 | 2022-04-19 | 深圳豪达尔机械有限公司 | Freezing type drying machine and control device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1068241C (en) | 2001-07-11 |
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