CN106839295A - For the low-temperature receiver centralized control system and control method of air conditioning test device - Google Patents
For the low-temperature receiver centralized control system and control method of air conditioning test device Download PDFInfo
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- CN106839295A CN106839295A CN201710041536.1A CN201710041536A CN106839295A CN 106839295 A CN106839295 A CN 106839295A CN 201710041536 A CN201710041536 A CN 201710041536A CN 106839295 A CN106839295 A CN 106839295A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
Abstract
The present invention relates to a kind of low-temperature receiver centralized control system and control method for air conditioning test device.Wherein low-temperature receiver centralized control system includes the chilled water water pump that cooling water water pump, multiple handpiece Water Chilling Units and multiple that cooling water temperature control module, cooling water pressure control module, chilled water temperature control module, chilled water pressure control module, multiple cooling tower and multiple be disposed in parallel on cooling water pipeline are disposed in parallel on chilled water supply channel.The present invention can provide the cooling water or chilled water of preference temperature and pressure for one or more tail end air conditioner experimental rigs, avoid individually being equipped with low-temperature receiver to each tail end air conditioner experimental rig, the present invention not only increases the utilization rate of the energy and resource, reduce the operating cost of user, and solve user's centralization build occur in laboratory planning is mixed and disorderly, floor space big, management dispersion and the excessively high problem of energy consumption, the present invention can create considerable economic benefit and social benefit.
Description
Technical field
The invention belongs to heat pump performance test equipment field, a kind of low-temperature receiver collection for air conditioning test device is specifically related to
Middle control system and control method.
Background technology
As population increases, the quickening with Development of China's Urbanization is industrialized, particularly heavy chemical industry and communications and transportation is quick
Development, energy demand significantly rises, and the energy constraint contradiction and the energy of economic development faces are asked using the environmental pollution for bringing
Topic becomes increasingly conspicuous.The need for ensureing that fast, economical develops, State Council has worked out important principles and policies：Exploitation and saving are simultaneously
Weight, puts saving prior, and the technological transformation and structural reform centered on saving are carried out to national economy.With for many years
Effort, per Unit GDP Energy Consumption is presented and accelerates downward trend statistics in recent years, but still has larger gap with the object of planning.So,
Promoting energy-saving and emission-reduction is still China's Faced In Sustainable Development long-term and difficult task.
It is comfortably an important indicator of modern life work pursuit, refrigerating and air conditioning industry faces great development machine
Meet.Major Air-conditioning Enterprises increase Innovation Input dynamics one after another.But meanwhile, with increasingly in short supply, the raising of production cost of the energy,
Enterprise is equally faced with stern challenge.For a long time, reduces cost, energy saving are the basic of Business survival.Refrigeration air-conditioner
Enterprise even more proposes energy saving, the demand of reduces cost in all fields.The research and inspection of air-conditioning products are refrigeration air-conditioners
The important step of production, is also Air-conditioning Enterprise major power consumer.This is just proposed to refrigeration air-conditioner properties of product experimental rig
Requirement higher, while research detection is ensured, realizes energy-conservation to greatest extent.
From the point of view of according to the related investigational data of employer's organization, occupied by five famous brands after domestic Domestic air conditioning market and exceeded
After 80% share, business air conditioner also shows the general layout of oligopoly.The market concentration in business air conditioner market is improved constantly.
The Clustered Development pattern of this Air Conditioning Industry also further promotes the product of big refrigeration air-conditioner properties of product experimental rig group
It is raw.
Refrigeration air-conditioner properties of product experimental rig coverage is wider, is a complicated system engineering, is related at present more
Have water cooled chiller performance test apparatus, cooling by wind performance test apparatus, enthalpy difference experiment device, Teat pump boiler
Performance test apparatus, compressor performance experimental rig and multifunction test device etc..Either what type of performance test
Device, is both needed to be equipped with balance of the low-temperature receiver for realizing cold and hot amount, such as the pressure cold group in enthalpy difference experiment device needs cooling source
Cooling, the water tank in water cooled chiller performance test apparatus needs refrigerated source or cooling source for balancing what tested model machine brought
Waste heat.In traditional mode, the outfit of these low-temperature receivers is substantially supplied using dispersing mode, i.e., each experimental rig is independent
Low-temperature receiver is equipped with, such as cooling tower or handpiece Water Chilling Units certainly will so cause number of devices many, floor space is big, and cost of investment is high, and
And when experimental provision is not used, equipment is in idle state, the utilization rate of equipment is relatively low.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of low-temperature receiver centralized control system for air conditioning test device
And control method, the control system can easily for concentrating type business air conditioner experimental rig offer low-temperature receiver.
In order to realize the purpose of the present invention, present invention employs following technical scheme：
A kind of low-temperature receiver centralized control system for air conditioning test device, including cooling water temperature control module, cooling water
Pressure control module, multiple are disposed in parallel in cooling water for cooling tower and multiple that tail end air conditioner experimental rig provides cooling water
It is used to adjust the cooling water water pump of cooling water pressure on supply channel；
The cooling water temperature control module includes the first temperature sensor, PID temperature controller and a PLC control
Device, first temperature sensor is used to detect the actual water temperature in cooling water pipeline, and the PID temperature controller is used for
The actual water temperature and target water temperature are compared and send intensification or cooling signal, described first to the first PLC again
PLC be used for according to the intensification signal come control the cooling tower open one by one operation or according to the cooling signal come
The cooling tower is controlled to close one by one；
The cooling water pressure control module includes first pressure sensor, a PID pressure controllers and the 2nd PLC
Controller, the first pressure sensor is used to detect the actual pressure in cooling water pipeline, the PID pressure controls
Device processed is used to be compared to send supercharging or depressurize to second PLC again by the actual pressure and goal pressure to believe
Number, second PLC controls the cooling water water pump to open operation one by one or according to described according to the boost pressure signal
Depression signal controls the cooling water water pump to close one by one.
Further, the system also includes that chilled water temperature control module, chilled water pressure control module, multiple are end
The handpiece Water Chilling Units and multiple that air conditioning test device provides chilled water are disposed in parallel on chilled water supply channel for adjusting cold
Freeze the chilled water water pump of water pressure of supply water；
The chilled water temperature control module includes second temperature sensor and the 3rd PLC, second temperature
Degree sensor is used to detect chilled water supply channel and actual water temperature in water return pipeline, and the 3rd PLC is used for basis
The temperature signal of second temperature sensor detection calculates the reality between the chilled water supply channel and water return pipeline
The temperature difference, and the actual temperature difference is compared with the setting temperature difference, when the actual temperature difference then controls institute more than the setting temperature difference upper limit
State handpiece Water Chilling Units and open operation one by one, when the actual temperature difference then controls the handpiece Water Chilling Units to close one by one less than setting temperature difference lower limit
Close；
The chilled water pressure control module includes second pressure sensor, the 2nd PID pressure controllers and the 4th PLC
Controller, the second pressure sensor is used to detect actual pressure in chilled water supply channel, the 2nd PID Stress controls
Device is used to be compared actual pressure in the chilled water supply channel and goal pressure to be sent out to the 4th PLC again
Go out supercharging or depression signal, the 4th PLC controls the chilled water water pump to open one by one according to the boost pressure signal
Operation controls the chilled water water pump to close one by one according to the depression signal.
Further, the cooling water pipeline includes multiple the first branch lines being set up in parallel, multiple described cold
But water water pump is separately positioned on first branch line, and the cooling water converges to first by first branch line
Water knockout drum is again by multiple second branched pipe roads to multiple tail end air conditioner experimental rig cooling water supplies.
Further, the chilled water supply channel includes multiple Three branched pipe roads being set up in parallel, multiple described cold
Freeze water water pump to be separately positioned on the Three branched pipe road, the chilled water converges to second by the Three branched pipe road
Water knockout drum supplies chilled water by multiple 4th branch lines to multiple tail end air conditioner experimental rigs again.
Further, there are a frequency conversion cooling tower or all frequency conversions in the Cooling Towers that multiple cooling towers are constituted
Cooling tower；There are a frequency conversion cooling water water pump or all changes in the cooling water water pump group that multiple cooling water water pumps are constituted
Frequency cooling water water pump；There are an inverter controlled water chiller or all changes in the cooling-water machine group that multiple handpiece Water Chilling Units are constituted
Frequency handpiece Water Chilling Units；There are a frequency conversion chilled water water pump or whole in the chilled water water pump group that multiple chilled water water pumps are constituted
It is frequency conversion chilled water water pump.
A kind of control method based on the low-temperature receiver centralized control system, it is characterised in that：Including the cooling water temperature
The control process of the control process of control module and the cooling water pressure control module；
The control process of wherein described cooling water temperature control module is：
The first step, first temperature sensor is detected and by temperature to actual water temperature T1 in cooling water pipeline
Signal transmission is to the PID temperature controller；
Second step, the PID temperature controller is compared actual water temperature T1 with target water temperature T2 after obtaining temperature signal
Compared with：
When T1 is more than T2, the PID temperature controller then sends needs the signal of cooling, now the PLC controls
Device control First cooling tower starts converting operation, and output reaches 100% and maintains and sets when the First cooling tower runs
Fix time, switch to power frequency operation, and control second cooling tower to start converting operation simultaneously, control N platforms to cool down by that analogy
Tower is opened and runs up to the T1 equal to T2, N >=1；
When T1 is less than T2, the PID temperature controller then sends the signal for needing to heat up, now the PLC controls
Device controls the cooling tower of current converting operation to reduce output to setting value, while closing the cooling tower one by one according to order is opened
Until the T1 is equal to T2；
The control process of the cooling water pressure control module is：
The first step, the first pressure sensor is detected and by pressure to actual hydraulic pressure P1 in cooling water pipeline
Signal transmission is to a PID pressure controllers；
Second step, by the actual hydraulic pressure P1 and goal pressure after the PID pressure controllers acquisition pressure signal
P2 is compared：
When P1 is less than P2, a PID pressure controllers then send needs the signal of supercharging, now the 2nd PLC
Controller control First cooling water water pump starts converting operation, and output reaches during the First cooling water water pump operation
100% and maintain setting time and then switch to power frequency operation, and control second cooling water water pump to start converting operation simultaneously, with
This analogizes control until N platform cooling waters water pump opens operation and the P1 is equal to P2；
When P1 is more than P2, a PID pressure controllers then send needs the signal of step-down, now the 2nd PLC
Controller controls the cooling water water pump of current converting operation to reduce output to setting value, while closing institute one by one according to order is opened
Cooling water water pump is stated until the P1 is equal to P2.
Further, control process and the freezing hydraulic pressure of the method also including the chilled water temperature control module
The control process of power control module；
The control process of wherein described chilled water temperature control module is：
The first step, the second temperature sensor is detected to actual water temperature in chilled water water supply line and water return pipeline
And transmit to the 3rd PLC temperature signal；
Second step, the 3rd PLC calculates the chilled water water supply line and returns after obtaining the temperature signal
Actual temperature difference T between waterpipe, and actual temperature difference T is compared with the setting temperature difference：
When Δ T is more than the setting temperature difference upper limit, and the load percentage of each water chiller of current operation is more than setting value
And between a section of continuous service setting, then next water chiller is loaded, by that analogy until loading n-th water chiller
And Δ T is in the setting temperature difference；
When Δ T is less than less than setting temperature difference lower limit, and the load percentage sum of all water chillers of current operation
Between 100% and one section of continuous service setting, then the water chiller of current operation is unloaded one by one until Δ T is in the setting temperature difference
It is interior；
The control process of the chilled water pressure control module is：
The first step, the second pressure sensor is detected and by pressure to actual hydraulic pressure P3 in chilled water water supply line
Signal transmission is to the 2nd PID pressure controllers；
Second step, by the actual hydraulic pressure P3 and goal pressure after the 2nd PID pressure controllers acquisition pressure signal
P4 is compared：
When P3 is less than P4, the 2nd PID pressure controllers then send needs the signal of supercharging, now the 4th PLC
Controller control First chilled water water pump starts converting operation, and output reaches during the First chilled water water pump operation
Then switch to power frequency operation after 100%, and control second chilled water water pump to start converting operation simultaneously, by that analogy until N
Platform chilled water water pump opens operation and the P3 is equal to P4；
When P3 is more than P4, the 2nd PID pressure controllers then send needs the signal of step-down, now the 4th PLC
Controller controls current converting operation chilled water water pump to reduce output to setting value is less than, while being closed one by one according to order is opened
The chilled water water pump is equal to P4 until the P3；Above-mentioned N >=1.
The beneficial effects of the present invention are：
(1) present invention cooling water temperature in cooling water pipeline can be carried out by cooling water temperature control module and
When quickly adjust, the pressure of supply water of cooling water pipeline can be carried out additionally by cooling water pressure control module fast in time
The regulation of speed, to be embodied as the cooling water that one or more tail end air conditioner experimental rigs provide preference temperature and pressure.
The present invention can be entered to chilled water by chilled water temperature control module for the chilled water temperature difference in water return pipeline in addition
Row quickly adjust, the pressure of supply water of chilled water water supply line can be carried out additionally by chilled water pressure control module and
When quickly adjust, to be embodied as the chilled water that one or more tail end air conditioner experimental rigs provide preference temperature and pressure.
The present invention realizes the centralizedly supply of cooling water and chilled water, it is to avoid each tail end air conditioner experimental rig is individually matched somebody with somebody
Standby low-temperature receiver, the present invention not only increases the utilization rate of the energy and resource, reduces the operating cost of user, and solve user
The planning of appearance is mixed and disorderly in centralization construction laboratory, floor space is big, management disperses and the excessively high problem of energy consumption, and the present invention can
Create considerable economic benefit and social benefit.
(2) cooling water is passed through multiple second branched pipe roads to tail end air conditioner experiment by the present invention by first water knockout drum
Device carries out the second branched pipe road one tail end air conditioner experimental rig of correspondence of chilled(cooling) water supply (CWS), i.e., is tried according to tail end air conditioner
The quantity of experiment device, second branched pipe road described in selective enabling；Similarly, chilled water is passed through many by second water knockout drum
Individual 4th branch line carries out one end of the 4th branch line correspondence of freezing water supply, i.e., to tail end air conditioner experimental rig
Air conditioning test device, according to the quantity of tail end air conditioner experimental rig, the 4th branch line described in selective enabling.Present system
Compact conformation, floor space is small, it is easy to be managed collectively and operation energy consumption is low.
(3) can effectively be realized by control method of the present invention it is energy-saving, and can quickly realize to cooling water and
The temperature of chilled water and the accuracy controlling of pressure of supply water, in order to provide suitable low-temperature receiver for tail end air conditioner experimental rig, from
And ensure the degree of accuracy of heat pump performance test.Control system of the present invention is especially carried for multiple tail end air conditioner experimental rigs
Energy consumption is lower during cooling source.Even for a tail end air conditioner experimental rig provides low-temperature receiver, the control system can also make accordingly
Cooling tower or handpiece Water Chilling Units open operation in turn, it is to avoid equipment is left unused for a long time, improve capacity utilization.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
The implication marked in accompanying drawing is as follows：
The temperature sensors of 11- first；12-PID temperature controllers；The PLCs of 13- first；21- first pressures are sensed
Device；The PID pressure controllers of 22- the；The PLCs of 23- second；30- tail end air conditioner experimental rigs；40- cooling towers；50- is cold
But water water pump；61- second temperature sensors；The PLCs of 62- the 3rd；71- second pressure sensors；The PID pressure of 72- the 2nd
Controller；The PLCs of 73- the 4th；80- handpiece Water Chilling Units；90- chilled water water pumps；The branch lines of 101- first；First point of 102-
Hydrophone；103- second branched pipes road；104- cooling water collection raising middle flasks；111- Three branched pipes road；The water knockout drums of 112- second；113-
Four branch lines；114- chilled water collection raising middle flasks；120- header tanks.
Specific embodiment
More specific detail is made to technical solution of the present invention with reference to embodiment：
Embodiment 1
As shown in figure 1, low-temperature receiver centralized control system of the present invention includes cooling water temperature control module, cooling water pressure
Control module, multiple are set up in parallel and for the cooling tower 40 and multiple that tail end air conditioner experimental rig 30 provides cooling water set side by side
Put is used for the cooling water water pump 50 for adjusting cooling water pressure on cooling water pipeline；The cooling water backwater flow to collection
Water tank 120, the header tank 120 supplies water to the cooling tower 40 again, so as to form the circulation of cooling water and backwater.
The cooling water temperature control module includes the first temperature sensor 11, the PLC of PID temperature controller 12 and the
Controller 13, first temperature sensor 11 is used to detect the actual water temperature in cooling water pipeline, the PID temperature control
Device processed 12 is used to be compared to send intensification or lower the temperature to the first PLC 13 again by the actual water temperature and target water temperature to believe
Number, first PLC 13 is used to be controlled the cooling tower 40 to open operation or root one by one according to the intensification signal
The cooling tower 40 is controlled to close one by one according to the cooling signal；
The cooling water pressure control module includes first pressure sensor 21, a PID pressure controllers 22 and the
Two PLCs 23, the first pressure sensor 21 is used to detect the actual pressure in cooling water pipeline, described first
PID pressure controllers 22 are used to be compared the actual pressure and goal pressure to be sent out to second PLC 23 again
Go out supercharging or depression signal, second PLC 23 controls the cooling water water pump 50 one by one according to the boost pressure signal
Open operation or control the cooling water water pump 50 to close one by one according to the depression signal.
The system is also set up in parallel including chilled water temperature control module, chilled water pressure control module, multiple and is end
The handpiece Water Chilling Units 80 and multiple that end air conditioning test device provides chilled water are disposed in parallel on chilled water supply channel for adjusting
Save the chilled water water pump 90 of chilled water pressure of supply water；In the chilled water backwater composition handpiece Water Chilling Units after the condensed water of condenser again
It is back in above-mentioned cooling tower 40 by header tank 120.
The chilled water temperature control module includes the PLC 62 of second temperature sensor 61 and the 3rd, described the
Two temperature sensors 61 are used to detect chilled water supply channel with actual water temperature, the 3rd PLC 62 in water return pipeline
The chilled water supply channel and water return pipeline are calculated for the temperature signal detected according to the second temperature sensor 61
Between the actual temperature difference, and by the actual temperature difference with setting the temperature difference be compared, when the actual temperature difference more than setting the temperature difference on
Limit then control the handpiece Water Chilling Units 80 to open operation one by one, when the actual temperature difference be less than set temperature difference lower limit then control it is described cold
Water dispenser group 80 is closed one by one；
As shown in figure 1, the chilled water pressure control module includes second pressure sensor 71, the 2nd PID Stress controls
The PLC 73 of device 72 and the 4th, the second pressure sensor 71 is used to detect actual pressure in chilled water supply channel,
The 2nd PID pressure controllers 72 are used to be compared actual pressure in the chilled water supply channel and goal pressure again
Supercharging or depression signal are sent to the 4th PLC 73, the 4th PLC 73 is according to the boost pressure signal control
The chilled water water pump 90 is made to open operation one by one or control the chilled water water pump 90 to close one by one according to the depression signal.
The cooling water pipeline includes multiple the first branch lines 101 being set up in parallel, multiple cooling water water
Pump 50 is separately positioned on first branch line 101, and the cooling water converges to by first branch line 101
One water knockout drum 102 is again by the multiple cooling water supplies of tail end air conditioner experimental rig 30 in multiple 103 pairs, second branched pipe roads.
The chilled water supply channel includes multiple Three branched pipe roads 111 being set up in parallel, multiple chilled water water
Pump 90 is separately positioned on the Three branched pipe road 111, and the chilled water converges to by the Three branched pipe road 111
Breeching 112 supplies chilled water by the multiple tail end air conditioner experimental rigs 30 of multiple 4th branch lines 113 pairs again.
There are a frequency conversion cooling tower or all frequency conversion cooling towers in the Cooling Towers that multiple cooling towers 40 are constituted；
There are a frequency conversion cooling water water pump or all frequency conversions cold in the cooling water water pump group that multiple cooling water water pumps 50 are constituted
But water water pump；There are an inverter controlled water chiller or all frequency conversions in the cooling-water machine group that multiple handpiece Water Chilling Units 80 are constituted
Handpiece Water Chilling Units；There are a frequency conversion chilled water water pump or whole in the chilled water water pump group that multiple chilled water water pumps 90 are constituted
It is frequency conversion chilled water water pump.
Above-mentioned first PLC 13, the second PLC 23, the 3rd PLC 62, the 4th PLC 73 are equal
It is same PLC.
Embodiment 2
The control method of above-mentioned low-temperature receiver centralized control system, including the cooling water temperature control module control process with
And the control process of the cooling water pressure control module；
The control process of wherein described cooling water temperature control module is：
The first step, first temperature sensor 11 is detected and by temperature to actual water temperature T1 in cooling water pipeline
Spend signal transmission to the PID temperature controller 12；
Second step, the PID temperature controller 12 is carried out actual water temperature T1 with target water temperature T2 after obtaining temperature signal
Compare：
When T1 is more than T2, the PID temperature controller 12 then sends needs the signal of cooling, now the PLC controls
The control of device processed 13 First cooling tower 40 starts converting operation, when the First cooling tower 40 runs output reach 100% and
Then switch to power frequency operation after maintaining 5 minutes, and control second cooling tower 40 to start converting operation simultaneously, described second cold
But output reaches 100% and then switchs to power frequency operation after maintaining 5 minutes when tower 40 runs, and controls N platforms to cool down by that analogy
Tower 40 is opened and runs up to the T1 equal to T2；
When T1 is less than T2, the PID temperature controller 12 then sends the signal for needing to heat up, now the PLC controls
Device processed 13 controls the cooling tower 40 of current converting operation to reduce output to 60%, while being closed one by one according to unlatching order described cold
But tower 40 is until the T1 is equal to T2；
The control process of the cooling water pressure control module is：
The first step, the first pressure sensor 21 is detected to actual hydraulic pressure P1 in cooling water pipeline and will pressure
Force signal is transmitted to a PID pressure controllers 22；
Second step, by the actual hydraulic pressure P1 and target pressure after the acquisition of a PID pressure controllers 22 pressure signal
Power P2 is compared：
When P1 is less than P2, a PID pressure controllers 22 then send needs the signal of supercharging, now described second
The control First cooling water of PLC 23 water pump 50 starts converting operation, and the First cooling water water pump 50 is defeated when running
Go out to reach 100% and maintain setting time and then switch to power frequency operation, and control second cooling water water pump 50 to start to become simultaneously
Frequency runs, and output reaches 100% and maintains setting time and then switchs to power frequency operation during second cooling water water pump operation,
Control to open operation until N platform cooling waters water pump 50 by that analogy and the P1 is equal to P2；
When P1 is more than P2, a PID pressure controllers 22 then send needs the signal of step-down, now described second
PLC 23 controls the cooling water water pump 50 of current converting operation to reduce output to 60%, while according to unlatching order one by one
The cooling water water pump 50 is closed until the P1 is equal to P2.
Control process and chilled water pressure control mould of the method also including the chilled water temperature control module
The control process of block；
The control process of wherein described chilled water temperature control module is：
The first step, the second temperature sensor 61 is visited to actual water temperature in chilled water water supply line and water return pipeline
Survey and transmit to the 3rd PLC temperature signal；
Second step, the 3rd PLC 62 obtain calculate after the temperature signal chilled water water supply line and
Actual temperature difference T between water return pipeline, and actual temperature difference T is compared with the setting temperature difference：
When Δ T is more than the setting temperature difference upper limit, and each water chiller of current operation load percentage more than 90% and
During continuous service 1h, then next water chiller 80 is loaded, set until loading n-th water chiller 80 and Δ T by that analogy
In constant temperature difference；
When Δ T is less than less than setting temperature difference lower limit, and the load percentage sum of all water chillers 80 of current operation
During 100% and continuous service 1h, then the water chiller 80 of current operation is unloaded one by one until Δ T is in the setting temperature difference；
The control process of the chilled water pressure control module is：
The first step, the second pressure sensor 71 is detected to actual hydraulic pressure P3 in chilled water water supply line and will pressure
Force signal is transmitted to the 2nd PID pressure controllers 72；
Second step, by the actual hydraulic pressure P3 and target pressure after the acquisition of the 2nd PID pressure controllers 72 pressure signal
Power P4 is compared：
When P3 is less than P4, the 2nd PID pressure controllers 72 then send needs the signal of supercharging, now the described 4th
The control First chilled water of PLC 73 water pump 90 starts converting operation, and the First chilled water water pump 90 is defeated when running
Go out and then switch to power frequency operation after reaching 100%, and control second chilled water water pump 90 to start converting operation, described second simultaneously
Output then switchs to power frequency operation after reaching 100% when platform chilled water water pump 90 runs, by that analogy until N platform chilled water water pumps
90 unlatchings run and the P3 is equal to P4；
When P3 is more than P4, the 2nd PID pressure controllers 72 then send needs the signal of step-down, now the described 4th
PLC 73 controls current converting operation chilled water water pump 90 to reduce output to less than 60%, at the same according to open order by
It is individual to close the chilled water water pump 90 until the P3 is equal to P4.
Found after being controlled to the low-temperature receiver control system by above-mentioned control method：The method can effectively realize section
Energy lowers consumption, and can quickly realize the accuracy controlling of temperature and pressure of supply water to cooling water and chilled water.It is of the invention true
Protect as tail end air conditioner experimental rig provides suitable low-temperature receiver, so as to improve the degree of accuracy of heat pump performance test.
Claims (7)
1. a kind of low-temperature receiver centralized control system for air conditioning test device, it is characterised in that：Mould is controlled including cooling water temperature
It is block, cooling water pressure control module, multiple for tail end air conditioner experimental rig (30) provides the cooling tower (40) of cooling water and many
Individual being disposed in parallel on cooling water pipeline is used for the cooling water water pump (50) for adjusting cooling water pressure；
The cooling water temperature control module includes the first temperature sensor (11), PID temperature controller (12) and a PLC
Controller (13), first temperature sensor (11) is for detecting the actual water temperature in cooling water pipeline, the PID temperature
Degree controller (12) sends intensification to the first PLC (13) again for the actual water temperature and target water temperature to be compared
Or cooling signal, first PLC (13) is for controlling the cooling tower (40) according to the intensification signal one by one
Open and run or control the cooling tower (40) to close one by one according to the cooling signal；
The cooling water pressure control module includes first pressure sensor (21), a PID pressure controllers (22) and the
Two PLCs (23), the first pressure sensor (21) is described for detecting the actual pressure in cooling water pipeline
First PID pressure controllers (22) are controlled to the 2nd PLC again for the actual pressure and goal pressure to be compared
Device (23) sends supercharging or depression signal, and second PLC (23) controls the cooling water according to the boost pressure signal
Water pump (50) opens operation or controls the cooling water water pump (50) to close one by one according to the depression signal one by one.
2. the low-temperature receiver centralized control system of air conditioning test device is used for as claimed in claim 1, it is characterised in that：The system is also
Including chilled water temperature control module, chilled water pressure control module, multiple for tail end air conditioner experimental rig provides chilled water
Handpiece Water Chilling Units (80) and multiple are disposed in parallel on chilled water supply channel is used for the chilled water for adjusting chilled water pressure of supply water
Water pump (90)；
The chilled water temperature control module includes second temperature sensor (61) and the 3rd PLC (62), described the
Two temperature sensors (61) are for detecting chilled water supply channel with actual water temperature, the 3rd PLC in water return pipeline
(62) the chilled water supply channel is calculated for the temperature signal detected according to the second temperature sensor (61) and is returned
The actual temperature difference between water lines, and the actual temperature difference is compared with the setting temperature difference, when the actual temperature difference is more than setting
The temperature difference upper limit then controls the handpiece Water Chilling Units (80) to open operation one by one, when the actual temperature difference is then controlled less than setting temperature difference lower limit
The handpiece Water Chilling Units (80) are made to close one by one；
The chilled water pressure control module includes second pressure sensor (71), the 2nd PID pressure controllers (72) and the
Four PLCs (73), the second pressure sensor (71) is for detecting actual pressure in chilled water supply channel, described
Two PID pressure controllers (72) are for actual pressure in the chilled water supply channel and goal pressure to be compared again to institute
State the 4th PLC (73) and send supercharging or depression signal, the 4th PLC (73) is according to the boost pressure signal control
The chilled water water pump (90) is made to open operation one by one or control the chilled water water pump (90) one by one according to the depression signal
Close.
3. the low-temperature receiver centralized control system of air conditioning test device is used for as claimed in claim 1, it is characterised in that：The cooling
Water supply channel includes multiple the first branch lines (101) being set up in parallel, and multiple cooling water water pumps (50) are respectively provided with
On first branch line (101), the cooling water converges to the first water knockout drum by first branch line (101)
(102) again by multiple second branched pipes road (103) to multiple tail end air conditioner experimental rig (30) cooling water supplies.
4. the low-temperature receiver centralized control system of air conditioning test device is used for as claimed in claim 2, it is characterised in that：The freezing
Water supply channel includes multiple Three branched pipe roads (111) being set up in parallel, and multiple chilled water water pumps (90) are respectively provided with
On the Three branched pipe road (111), the chilled water converges to the second water knockout drum by the Three branched pipe road (111)
(112) chilled water is supplied to multiple tail end air conditioner experimental rigs (30) by multiple 4th branch lines (113) again.
5. the low-temperature receiver centralized control system of air conditioning test device is used for as claimed in claim 2, it is characterised in that：It is multiple described
There are a frequency conversion cooling tower or all frequency conversion cooling towers in the Cooling Towers that cooling tower (40) is constituted；Multiple cooling waters
There are a frequency conversion cooling water water pump or all frequency conversion cooling water water pumps in the cooling water water pump group that water pump (50) is constituted；It is multiple
There are an inverter controlled water chiller or all inverter controlled water chillers in the cooling-water machine group that the handpiece Water Chilling Units (80) are constituted；It is many
There are a frequency conversion chilled water water pump or all frequency conversions cold in the chilled water water pump group that the individual chilled water water pump (90) is constituted
Freeze water water pump.
6. a kind of control method based on low-temperature receiver centralized control system described in claim 2, it is characterised in that：Including the cooling
The control process of the control process of coolant-temperature gage control module and the cooling water pressure control module；
The control process of wherein described cooling water temperature control module is：
The first step, first temperature sensor (11) is detected and by temperature to actual water temperature T1 in cooling water pipeline
Signal transmission is to the PID temperature controller (12)；
Second step, the PID temperature controller (12) is compared actual water temperature T1 with target water temperature T2 after obtaining temperature signal
Compared with：
When T1 is more than T2, the PID temperature controller (12) then sends needs the signal of cooling, now the PLC controls
Device (13) controls First cooling tower (40) to start converting operation, and output reaches when the First cooling tower (40) is run
100% and maintain setting time and then switch to power frequency operation, and control second cooling tower (40) to start converting operation simultaneously, with
This analogizes control N platforms cooling tower (40) unlatching and runs up to the T1 equal to T2, N >=1；
When T1 is less than T2, the PID temperature controller (12) then sends the signal for needing to heat up, now the PLC controls
Device (13) controls the cooling tower (40) of current converting operation to reduce output to setting value, while closing institute one by one according to order is opened
Cooling tower (40) is stated until the T1 is equal to T2；
The control process of the cooling water pressure control module is：
The first step, the first pressure sensor (21) is detected and by pressure to actual hydraulic pressure P1 in cooling water pipeline
Signal transmission is to a PID pressure controllers (22)；
Second step, by the actual hydraulic pressure P1 and goal pressure after a PID pressure controllers (22) the acquisition pressure signal
P2 is compared：
When P1 is less than P2, a PID pressure controllers (22) then send needs the signal of supercharging, now the 2nd PLC
Controller (23) controls First cooling water water pump (50) to start converting operation, when the First cooling water water pump (50) is run
Output reaches 100% and maintains setting time and then switchs to power frequency operation, and controls second cooling water water pump (50) to open simultaneously
Beginning converting operation, controls to open operation until N platform cooling waters water pump (50) by that analogy and the P1 is equal to P2；
When P1 is more than P2, a PID pressure controllers (22) then send needs the signal of step-down, now the 2nd PLC
Controller (23) controls the cooling water water pump (50) of current converting operation to reduce output to setting value, at the same according to open order by
It is individual to close the cooling water water pump (50) until the P1 is equal to P2.
7. the control method of low-temperature receiver centralized control system as claimed in claim 6, it is characterised in that：The method also includes described cold
Freeze the control process of coolant-temperature gage control module and the control process of the chilled water pressure control module；
The control process of wherein described chilled water temperature control module is：
The first step, the second temperature sensor (61) detects to actual water temperature in chilled water water supply line and water return pipeline
And transmit to the 3rd PLC temperature signal；
Second step, the 3rd PLC (62) calculates the chilled water water supply line and returns after obtaining the temperature signal
Actual temperature difference T between waterpipe, and actual temperature difference T is compared with the setting temperature difference：
When Δ T is more than setting value and holds more than the setting temperature difference upper limit, and the load percentage of each water chiller of current operation
Between a section of reforwarding row setting, then next water chiller (80) is loaded, by that analogy until loading n-th water chiller
(80) and Δ T setting the temperature difference in；
When Δ T is less than less than setting temperature difference lower limit, and the load percentage sum of all water chillers (80) of current operation
Between 100% and one section of continuous service setting, then the water chiller (80) of current operation is unloaded one by one until Δ T is in setting
In the temperature difference；
The control process of the chilled water pressure control module is：
The first step, the second pressure sensor (71) is detected and by pressure to actual hydraulic pressure P3 in chilled water water supply line
Signal transmission is to the 2nd PID pressure controllers (72)；
Second step, by the actual hydraulic pressure P3 and goal pressure after the 2nd PID pressure controllers (72) the acquisition pressure signal
P4 is compared：
When P3 is less than P4, the 2nd PID pressure controllers (72) then send needs the signal of supercharging, now the 4th PLC
Controller (73) controls First chilled water water pump (90) to start converting operation, when the First chilled water water pump (90) is run
Output then switchs to power frequency operation after reaching 100%, and controls second chilled water water pump (90) to start converting operation simultaneously, with this
Analogize until N platform chilled waters water pump (90) opens operation and the P3 is equal to P4；
When P3 is more than P4, the 2nd PID pressure controllers (72) then send needs the signal of step-down, now the 4th PLC
The current converting operation chilled water water pump (90) of controller (73) control reduces output to setting value is less than, while according to unlatching order
The chilled water water pump (90) is closed one by one until the P3 is equal to P4；Above-mentioned N >=1.
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| CN114909771A (en) * | 2022-05-09 | 2022-08-16 | 南京亚派软件技术有限公司 | Air conditioner cooling water operation control system |
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