CN105894916A - Simple air-conditioning system flow process control experimental device - Google Patents
Simple air-conditioning system flow process control experimental device Download PDFInfo
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- CN105894916A CN105894916A CN201610248136.3A CN201610248136A CN105894916A CN 105894916 A CN105894916 A CN 105894916A CN 201610248136 A CN201610248136 A CN 201610248136A CN 105894916 A CN105894916 A CN 105894916A
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Abstract
The invention relates to a simple air-conditioning system flow process control experimental device. The simple air-conditioning system flow process control experimental device includes an air-conditioning system simulator, a flow process control device and a sealed hollow box which simulates the used space of an air-conditioning system, wherein the air-conditioning system simulator is used for simulating a current air-conditioning system; a data detection device includes a fresh air temperature sensor and an indoor temperature sensor; the fresh air temperature sensor is used for detecting the temperature of the fresh air entering a fresh air unit housing; the indoor temperature sensor is used for detecting the temperature in the sealed hollow box; and the flow process control device is used for respectively controlling the heating degree on the fresh air for a heating device and the cooling degree on the fresh air for a cooling device according to the temperature signals detected by the fresh air temperature sensor and the indoor temperature sensor. The simple air-conditioning system flow process control experimental device has the advantages of being simple in structure, being low in cost, being convenient to use, being very visual in the whole control process, and being conductive to improvement of experiment teaching quality.
Description
Technical field
The invention belongs to experiment device for teaching, particularly to the experimental provision being capable of Simple air conditioner flow system flow process control that a kind of budget is relatively low.
Background technology
Air conditioning system capital equipment is typically made up of Cooling and Heat Source, air-conditioning or Fresh air handling units, wherein Cooling and Heat Source generally comprises cold station, heat pump etc., directly uses existing air conditioning system as experimental provision, and it is expensive, relatively costly, it is unfavorable for that the relatively low experiment of budget is carried out.
Air conditioning system flow-control typically selects DDC, PLC to be controlled, DDC and PLC cost is of a relatively high, and single-chip microcomputer relative low price, operability is the most higher.
Air conditioning system and control are one very important core curriculum of building intelligence major, the most extensive in practical engineering application, but experimental provision is fewer, the most both air conditioning system can well have been simulated, discharge process control can be realized again, and the experiment porch that the budget that can realize homogeneous of people is relatively low, there is presently no.
Currently used experiment porch is exactly the engineering equipment simulating air conditioning system, and this kind of engineering equipment may be used for teaching simulation test, but cost is the highest, it is impossible to homogeneous of warrantor, is unfavorable for teaching.
Summary of the invention
The problems referred to above existed for prior art, it is an object of the invention to design a kind of Simple air conditioner flow system flow process control device, make student control to be more clearly understood to air conditioning system operational process and discharge process in teaching.
For achieving the above object, the present invention adopts the following technical scheme that Simple air conditioner flow system flow process control device, controls device and the sealing hollow box body in simulation air conditioning system use space including air conditioning system analog, discharge process；
Air conditioning system analog, including Fresh air handling units housing, new wind air door, heater, chiller, blower fan and data detection device；
Described new wind air door is arranged in Fresh air handling units housing, for controlling the entrance of new wind；
Heater is arranged in Fresh air handling units housing, for heating the new wind entered；
Chiller is arranged in Fresh air handling units housing, for cooling down the new wind entered；
Blower fan is arranged in Fresh air handling units housing, and near sealing hollow box body, seals in hollow box body for the hot blast after heating devices heat or the cold wind after apparatus for supercooling cools down being sent into；
Data detection device, including new air temperature sensor and indoor temperature transmitter；
Described new air temperature sensor is for detecting the temperature of the new wind entering Fresh air handling units housing, and described indoor temperature transmitter is for detecting the temperature sealed in hollow box body；
Discharge process controls device for the temperature signal detected according to new air temperature sensor and indoor temperature transmitter, controls heater respectively to the degree of heat of new wind and the chiller cooling degree to new wind；
The new wind signal input part that the new air temperature signal output part of described new air temperature sensor controls device with discharge process is connected, the room-temperature signal input that indoor temperature transmitter room-temperature signal outfan controls device with discharge process is connected, discharge process controls the computer heating control end of device and is connected with heater, and discharge process controls the cooling control end of device and is connected with chiller.
As preferably, also include filter screen；Described filter screen is arranged in Fresh air handling units housing, and is positioned at the right side of new wind air door, for the new wind entered in Fresh air handling units housing is carried out filtration treatment.
As preferably, described discharge process controls device, including AD conversion module and control module；
The new air temperature signal output part of described new air temperature sensor is connected with the new wind input end of analog signal of AD conversion module, and the new wind digital signal output end of AD conversion module is connected with the new wind signal input part of control module；
The room-temperature signal outfan of described indoor temperature transmitter is connected with the room temperature simulation signal input part of AD conversion module, and the room temperature digital signal output end of AD conversion module is connected with the room-temperature signal input of control module.
As preferably, described AD conversion module uses AD7711 modular converter.
Described control module uses AT89S52 single chip control module.
As preferably, described heater, including heating coil, heating member, hot liquid booster pump, hot liquid storage tank and hot liquid flow valve；
Described hot liquid storage tank is built with heatable liquid；
Described heating member is for heating liquid in hot liquid storage tank；
Described heating coil is arranged in Fresh air handling units housing, and is positioned at the right side of filter screen, and heating coil is for heating the new wind after filter screen filtration；The warm fluid inlet of heating coil is connected with hot liquid storage tank by hot liquid inlet pipe, and the hot liquid outlet of heating coil goes out pipe by hot liquid and connects with hot liquid storage tank；
Described hot water booster pump is arranged on hot liquid inlet pipe, and hot liquid flow valve is arranged on hot liquid and goes out on pipe；
The computer heating control end of described control module is connected with hot liquid flow valve.
As preferably, described chiller, including cooling coil, cooling piece, cold liquid tank, cold liquid booster pump and cold fluid flow valve；
Described cold liquid tank is built with coolable liquid；
Described cooling piece is for cooling down the liquid in cold liquid tank；
Described cooling coil is arranged in Fresh air handling units housing, and is positioned at the right side of filter screen, and cooling coil is for cooling down the new wind after filter screen filtration；The cold liquid-inlet of cooling coil leads to subcooled liquid inlet pipe and connects with cold liquid tank, and the cold liquid outlet of cooling coil is connected by cold liquid discharge Guan Yuleng liquid tank；
Described cold liquid booster pump is arranged on cold liquid inlet pipe, and cold fluid flow valve is arranged on cold liquid discharge pipe；
The cooling of described control module controls end and is connected with cold fluid flow valve.
As preferably, described discharge process controls device and also includes LCD MODULE；The display signal input part of described LCD MODULE is connected with the display signal input part of control module, LCD MODULE temperature, hot liquid flow valve and the aperture of cold fluid flow valve in showing access into the temperature of the new wind of Fresh air handling units housing, sealing hollow box body.
As preferably, described discharge process controls device and also includes input module；The instruction output end of described input module is connected with the command input of control module, and input module is for arranging the temperature sealed in hollow box body.
As preferably, described discharge process controls device and also includes power module；Described power module is for powering to AD conversion module, control module, LCD MODULE and input module.
Relative to prior art, present invention have the advantage that the Simple air conditioner flow system flow process control device that the present invention provides, simple in construction, easy to use, whole control process is very directly perceived, convenient teaching.The more important thing is, compare existing engineering equipment, this experimental provision cost is the lowest such that it is able to ensure in experimental teaching as much as possible, every a set of experimental facilities of student, makes student can take action on one's own operation experiments, improves experimental teaching quality.
Accompanying drawing explanation
Fig. 1 is the Simple air conditioner flow system flow process control device structural representation of the present invention.
Detailed description of the invention
Below the present invention is described in further detail.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as "left", "right" are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Simple air conditioner flow system flow process control device, controls device and the sealing hollow box body 8 in simulation air conditioning system use space including air conditioning system analog, discharge process；
Air conditioning system analog, including Fresh air handling units housing 1, new wind air door 3, heater, chiller, blower fan 7 and data detection device；
Described new wind air door 3 is arranged in Fresh air handling units housing 1, for controlling the entrance of new wind；
Heater is arranged in Fresh air handling units housing 1, for heating the new wind entered；
Chiller is arranged in Fresh air handling units housing 1, for cooling down the new wind entered；
Blower fan 7 is arranged in Fresh air handling units housing 1, and near sealing hollow box body 8, seals in hollow box body 8 for the hot blast after heating devices heat or the cold wind after apparatus for supercooling cools down being sent into；When being embodied as, the outlet air end of Fresh air handling units housing 1 and the air intake sealing hollow box body 8 are tightly connected, and the air outlet of blower fan 7 is facing to the air intake sealing hollow box body 8；
Data detection device, including new air temperature sensor 2 and indoor temperature transmitter 9；
Described new air temperature sensor 2 is for detecting the temperature of the new wind entering Fresh air handling units housing 1, and described indoor temperature transmitter 9 is for detecting the temperature sealed in hollow box body 8；
Discharge process controls device for the temperature signal detected according to new air temperature sensor 2 and indoor temperature transmitter 9, controls heater respectively to the degree of heat of new wind and the chiller cooling degree to new wind；
The new wind signal input part that the new air temperature signal output part of described new air temperature sensor 2 controls device with discharge process is connected, the room-temperature signal input that indoor temperature transmitter 9 room-temperature signal outfan controls device with discharge process is connected, discharge process controls the computer heating control end of device and is connected with heater, and discharge process controls the cooling control end of device and is connected with chiller.
Discharge process controls dress and can use any control heater that can realize that to new wind, new wind degree of heat and chiller are cooled down the prior art of degree, it is preferred to use following structure:
Discharge process controls device, including AD conversion module 18 and control module 19；
The new air temperature signal output part of described new air temperature sensor 2 is connected with the new wind input end of analog signal of AD conversion module 18, and the new wind digital signal output end of AD conversion module 18 is connected with the new wind signal input part of control module 19；
The room-temperature signal outfan of described indoor temperature transmitter 9 is connected with the room temperature simulation signal input part of AD conversion module 18, and the room temperature digital signal output end of AD conversion module 18 is connected with the room-temperature signal input of control module 19.
The temperature analog signal that new air temperature sensor 2 and indoor temperature transmitter 9 detect is converted into standard electric signal and reaches control module 19 by AD conversion module 18, it is simple to control module 19 processes.AD conversion module 18 uses AD7711 modular converter.AD7711 is to aim at low frequency signal to realize high-acruracy survey and the A/D conversion chip that designs, is especially suitable for applying based on monolithic processor controlled system.Control module 19 uses AT89S52 single chip control module.AT89S52 single-chip microcomputer have cheap, integrated level is high, good reliability, easily extension, control the features such as function is strong, be particularly suitable for education experiment and carry out.
Described discharge process controls device and also includes LCD MODULE 20；The display signal input part of described LCD MODULE 20 is connected with the display signal input part of control module 19, and LCD MODULE 20 is used for showing access into temperature, hot liquid flow valve 10 and the cold fluid flow valve 11(in the temperature of the new wind of Fresh air handling units housing 1, sealing hollow box body 8 and sees below narration) aperture.
Operating for convenience, more for properer simulation air conditioning system, described discharge process controls device and also includes input module 21；The instruction output end of described input module 21 is connected with the command input of control module 19, and input module 21 is for arranging the temperature sealed in hollow box body 8.During using this assay device to test, the temperature simulating existing air conditioning system for its action space can be set by input module 21, the temperature sealed in hollow box body 8 is i.e. set by input module 21, control module 19 controls heater according to the temperature instruction received or refrigerating plant carries out suitable heating or refrigeration to new wind, and the final temperature ensured in sealing hollow box body 8 is equal with the temperature that input module 21 inputs.
Described discharge process controls device and also includes power module 22；Described power module 22 is for powering to AD conversion module 18, control module 19, LCD MODULE 20 and input module 21.New air temperature sensor 2 and indoor temperature transmitter 9 individually can also can be powered by DC source by power module 22 power supply, the benefit that the present invention uses power module 22 that aforementioned modules is unified energising essentially consists in, centrally connected power supply is convenient to be controlled, individually mixed and disorderly for electrical lead problem can be reduced simultaneously, once some current supply circuit goes wrong, it is simple to the problem looked in time and convenient maintenance.
Being analyzed experimentation the data obtained for convenience, discharge process controls device and also includes communication unit 23, for being communicated with computer by RS232 interface, carries out data and spreads out of.
As optimization, Simple air conditioner flow system flow process control device also includes filter screen 4；Filter screen 4 is arranged in Fresh air handling units housing 1, and is positioned at the right side of new wind air door 3, for the new wind entered in Fresh air handling units housing 1 is carried out filtration treatment.I.e. enter the new wind in Fresh air handling units housing 1 and preferably first pass through the filtration treatment of filter screen 4, then cooled down by heating devices heat or chiller.
Heater can realize any prior art heating the new wind entered in Fresh air handling units housing 1, is preferably as follows structure:
Described heater includes heating coil 5, heating member 12, hot liquid booster pump 13, hot liquid storage tank 14 and hot liquid flow valve 10；
Described hot liquid storage tank 14 is built with heatable liquid；
Described heating member 12 is for heating liquid in hot liquid storage tank 14, and when being embodied as, heating member 12 can select heating rod, simply and easily operates；
Described heating coil 5 is arranged in Fresh air handling units housing 1, and is positioned at the right side of filter screen 4, and heating coil 5 is for heating the new wind after drainage screen 4 filters；The warm fluid inlet of heating coil 5 is connected with hot liquid storage tank 14 by hot liquid inlet pipe, and the hot liquid outlet of heating coil 5 goes out pipe by hot liquid and connects with hot liquid storage tank 14；
Described hot water booster pump 13 is arranged on hot liquid inlet pipe, and hot liquid flow valve 10 is arranged on hot liquid and goes out on pipe；Hot water booster pump 13 Main Function is to be pumped in heating coil 5 by liquid pressing in hot liquid storage tank 14；
The computer heating control end of described control module 19 is connected with hot liquid flow valve 10.By controlling the degree that the new wind entered in Fresh air handling units housing 1 is heated by the aperture regulation heating coil 5 of hot liquid flow valve 10.
Chiller can realize any prior art cooling down the new wind entered in Fresh air handling units housing 1, is preferably as follows structure:
Described chiller, including cooling coil 6, cooling piece 16, cold liquid tank 17, cold liquid booster pump 15 and cold fluid flow valve 11；
Described cold liquid tank 17 is built with coolable liquid；
Described cooling piece 16 is for cooling down the liquid in cold liquid tank 17；When being embodied as, cooling piece 16 can select ice cube, is on the one hand readily obtained, and on the other hand experimental implementation cost is the lowest；
Described cooling coil 6 is arranged in Fresh air handling units housing 1, and is positioned at the right side of filter screen 4, and cooling coil 6 is for cooling down the new wind after drainage screen 4 filters；The cold liquid-inlet of cooling coil 6 leads to subcooled liquid inlet pipe and connects with cold liquid tank 17, and the cold liquid outlet of cooling coil 6 is connected by cold liquid discharge Guan Yuleng liquid tank 17；
Described cold liquid booster pump 15 is arranged on cold liquid inlet pipe, and cold fluid flow valve 11 is arranged on cold liquid discharge pipe；Cold liquid booster pump 15 Main Function is to be pumped in cooling coil 6 by liquid pressing in cold liquid tank 17；
The cooling of described control module 19 controls end and is connected with cold fluid flow valve 11.By controlling the degree that the new wind entered in Fresh air handling units housing 1 is cooled down by the aperture regulation cooling coil 6 of cold fluid flow valve 11.
When being embodied as, the liquid in hot liquid storage tank 14 and cold liquid tank 17 is water, selects water, is primarily due to water and is on the one hand easier to obtain, and on the other hand its use cost is the lowest, for education experiment, more feasible.
The operation principle of Simple air conditioner flow system flow process control device that the present invention be given be described in detail below:
New air temperature sensor 2 and indoor temperature transmitter 9 detect analog temperature signal, AT89S52 single chip control module is reached through the AD7711 modular converter transfer standard signal of telecommunication, AT89S52 single chip control module can utilize digital pid control algolithm to carry out calculating, and (digital pid control algolithm belongs to existing algorithm, do not repeating) controlled quentity controlled variable that obtains, it is transformed into simulation controlled quentity controlled variable again by AD7711 modular converter, AT89S52 single chip control module controls the aperture of hot liquid flow valve 10 according to the simulation controlled quentity controlled variable that AD7711 modular converter is transformed into, the uninterrupted of the hot water being adjusted in heating coil 5, thus control the temperature of the hot blast blown out by blower fan；Or AT89S52 single chip control module controls the aperture of cold fluid flow valve 11, the uninterrupted of the cold water being adjusted in cooling coil 6 according to the simulation controlled quentity controlled variable that AD7711 modular converter is transformed into, thus controls the temperature of the cold wind blown out by blower fan；
AT89S52 single chip control module controls the quality of quality to hot liquid flow valve 10 and cold fluid flow valve 11 aperture, depend primarily on the selection controlling parameter in digital pid control algolithm, suitably control parameter, satisfied control effect can be brought, otherwise, controller parameter selects improper, then can make control degradation, falling flat, it is therefore desirable to carry out adjusting of pid parameter, optional examination method of gathering determines that PID regulates parameter.Examination method of gathering is the response curve (such as step response) by dry run viewing system, the substantially impact then responded system according to each regulation parameter, repeatedly gathers examination parameter, to reach satisfied response, so that it is determined that the regulation parameter of PID.Scaling up coefficient, typically by accelerating the response of system, is conducive to reducing static difference.But excessive proportionality coefficient can make system have bigger overshoot, and produces vibration, weakens stability.Increase and be conducive to reducing overshoot the time of integration, make system stability, but the elimination of system static difference will be slowed down.Increasing and be conducive to quickening system to respond derivative time, make overshoot reduce, stability increases, but the rejection ability for interference signal will weaken.When gathering examination, refer to the above parameter effect tendency to the process of control, parameter is carried out the step of adjusting of first ratio, rear integration, then differential.
Finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent, without deviating from objective and the scope of technical solution of the present invention, it all should be contained in the middle of scope of the presently claimed invention.
Claims (10)
1. Simple air conditioner flow system flow process control device, it is characterised in that: include that air conditioning system analog, discharge process control device and the sealing hollow box body (8) in simulation air conditioning system use space；
Air conditioning system analog, including Fresh air handling units housing (1), new wind air door (3), heater, chiller, blower fan (7) and data detection device；
Described new wind air door (3) is arranged in Fresh air handling units housing (1), for controlling the entrance of new wind；
Heater is arranged in Fresh air handling units housing (1), for heating the new wind entered；
Chiller is arranged in Fresh air handling units housing (1), for cooling down the new wind entered；
Blower fan (7) is arranged in Fresh air handling units housing (1), and near sealing hollow box body (8), seals in hollow box body (8) for the hot blast after heating devices heat or the cold wind after apparatus for supercooling cools down being sent into；
Data detection device, including new air temperature sensor (2) and indoor temperature transmitter (9)；
Described new air temperature sensor (2) is used for detecting the temperature of the new wind entering Fresh air handling units housing (1), and described indoor temperature transmitter (9) is used for detecting the temperature sealed in hollow box body (8)；
Discharge process controls device for the temperature signal that detects according to new air temperature sensor (2) and indoor temperature transmitter (9), and control heater is to the degree of heat of new wind and the chiller cooling degree to new wind respectively；
The new wind signal input part that the new air temperature signal output part of described new air temperature sensor (2) controls device with discharge process is connected, the room-temperature signal input that indoor temperature transmitter (9) room-temperature signal outfan controls device with discharge process is connected, discharge process controls the computer heating control end of device and is connected with heater, and discharge process controls the cooling control end of device and is connected with chiller.
2. Simple air conditioner flow system flow process control device as claimed in claim 1,
It is characterized in that: also include filter screen (4)；
Described filter screen (4) is arranged in Fresh air handling units housing (1), and is positioned at the right side of new wind air door (3), for the new wind entered in Fresh air handling units housing (1) is carried out filtration treatment.
3. Simple air conditioner flow system flow process control device as claimed in claim 2,
It is characterized in that: described discharge process controls device, including AD conversion module (18) and control module (19)；
The described new air temperature signal output part of new air temperature sensor (2) is connected with the new wind input end of analog signal of AD conversion module (18), and the new wind digital signal output end of AD conversion module (18) is connected with the new wind signal input part of control module (19)；
The room-temperature signal outfan of described indoor temperature transmitter (9) is connected with the room temperature simulation signal input part of AD conversion module (18), and the room temperature digital signal output end of AD conversion module (18) is connected with the room-temperature signal input of control module (19).
4. Simple air conditioner flow system flow process control device as claimed in claim 3, it is characterised in that: described AD conversion module (18) uses AD7711 modular converter.
5. Simple air conditioner flow system flow process control device as claimed in claim 3,
It is characterized in that: described control module (19) uses AT89S52 single chip control module.
6. the Simple air conditioner flow system flow process control device as described in any one of claim 3,
It is characterized in that: described heater, including heating coil (5), heating member (12), hot liquid booster pump (13), hot liquid storage tank (14) and hot liquid flow valve (10)；
Described hot liquid storage tank (14) is built with heatable liquid；
Described heating member (12) is for heating hot liquid storage tank (14) interior liquid；
Described heating coil (5) is arranged in Fresh air handling units housing (1), and is positioned at the right side of filter screen (4), and heating coil (5) is for heating the new wind after drainage screen (4) filters；The warm fluid inlet of heating coil (5) is connected with hot liquid storage tank (14) by hot liquid inlet pipe, and the hot liquid outlet of heating coil (5) goes out pipe by hot liquid and connects with hot liquid storage tank (14)；
Described hot water booster pump (13) is arranged on hot liquid inlet pipe, and hot liquid flow valve (10) is arranged on hot liquid and goes out on pipe；
The computer heating control end of described control module (19) is connected with hot liquid flow valve (10).
7. the Simple air conditioner flow system flow process control device as described in any one of claim 3,
It is characterized in that: described chiller, including cooling coil (6), cooling piece (16), cold liquid tank (17), cold liquid booster pump (15) and cold fluid flow valve (11)；
Described cold liquid tank (17) is built with coolable liquid；
Described cooling piece (16) is for cooling down the liquid in cold liquid tank (17)；
Described cooling coil (6) is arranged in Fresh air handling units housing (1), and is positioned at the right side of filter screen (4), and cooling coil (6) is for cooling down the new wind after drainage screen (4) filters；The cold liquid-inlet of cooling coil (6) leads to subcooled liquid inlet pipe and connects with cold liquid tank (17), and the cold liquid outlet of cooling coil (6) is connected by cold liquid discharge Guan Yuleng liquid tank (17)；
Described cold liquid booster pump (15) is arranged on cold liquid inlet pipe, and cold fluid flow valve (11) is arranged on cold liquid discharge pipe；
The cooling of described control module (19) controls end and is connected with cold fluid flow valve (11).
Simple air conditioner flow system flow process control device the most as claimed in claims 6 or 7, it is characterised in that: described discharge process controls device and also includes LCD MODULE (20)；
The display signal input part of described LCD MODULE (20) is connected with the display signal input part of control module (19), and LCD MODULE (20) is used for the temperature showing access into the new wind of Fresh air handling units housing (1), the temperature, hot liquid flow valve (10) and the aperture of cold fluid flow valve (11) that seal in hollow box body (8).
9. Simple air conditioner flow system flow process control device as claimed in claim 8,
It is characterized in that: described discharge process controls device and also includes input module (21)；
The instruction output end of described input module (21) is connected with the command input of control module (19), and input module (21) is used for arranging the temperature sealed in hollow box body (8).
10. Simple air conditioner flow system flow process control device as claimed in claim 9,
It is characterized in that: described discharge process controls device and also includes power module (22)；
Described power module (22) is for powering to AD conversion module (18), control module (19), LCD MODULE (20) and input module (21).
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| CN201610248136.3A CN105894916A (en) | 2016-04-20 | 2016-04-20 | Simple air-conditioning system flow process control experimental device |
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| CN201610248136.3A CN105894916A (en) | 2016-04-20 | 2016-04-20 | Simple air-conditioning system flow process control experimental device |
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Application publication date: 20160824 |