CN209484770U - A kind of energy-efficient air-conditioner water system - Google Patents
A kind of energy-efficient air-conditioner water system Download PDFInfo
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- CN209484770U CN209484770U CN201822121868.3U CN201822121868U CN209484770U CN 209484770 U CN209484770 U CN 209484770U CN 201822121868 U CN201822121868 U CN 201822121868U CN 209484770 U CN209484770 U CN 209484770U
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Abstract
This application discloses a kind of energy-efficient air-conditioner water systems, including frequency conversion refrigeration host computer, control cabinet and n end branch in parallel, n >=2, freezing in frequency conversion refrigeration host computer is supplied water through water pump pumps to each end, after the completion of end exchanges heat, frequency conversion refrigeration host computer back to is sent the chilled water pump after heat exchange by water pump again, pressure sensor and motor-driven pressure-difference valve are installed for water return pipeline always, the upstream of each end branch is equipped with static balancing valve, downstream successively installation and adjustment valve and differential pressure balancing valve, the frequency conversion refrigeration host computer, differential pressure pickup, motor-driven pressure-difference valve and end branch regulating valve are all connected with control cabinet.The application solves the problems, such as that water pump energy consumption caused by " big flow, the small temperature difference " operational mode is excessively high in air conditioning water operation using various ways such as static balancing valve, differential pressure balancing valve, pump variable frequencies, while can better meet indoor occupant temperature requirement.
Description
Technical field
This application involves a kind of energy-efficient air-conditioner water systems.
Background technique
In air-conditioner water system, pump selection needs the index circuit resistance according to water system, design heating load to determine
The lift and flow of water pump.In the process, if system is according to oepration at full load, the operation of index circuit equipment be can reach
Design point.When system Construction completes starting operation, water pump oepration at full load, least favorable end reaches design point, and other
Branch can only determine that flow can be greater than design discharge, it is still necessary to which the control valve opening of branch just can reach design shape where adjusting
State.In actual motion, control valve opening is accordingly automatically adjusted by room temperature, and custom requirements room temperature deviates design temperature
Adjust control valve opening at ± 2 DEG C, A, B value (A > B) of corresponding valve opening, it is known that when valve opening reaches A, can meet
Room temperature requirement, flow is greater than design-calculated flow at this time.Comprehensive multiple ends, it is known that even if full load condition, due to room temperature
Adjustable range, the practical total flow of system is greater than design discharge, and water pump actual flow becomes larger, and pump energy consumption increases.
In addition, regulating valve pressure at two ends difference will affect control characteristic, when pressure at two ends difference is more than the pressure difference that specification provides
When valve regulating characteristic curve can shift (such as Fig. 1, curve moves up when pressure difference increases, and flow increases), and designer is logical
Regulating valve often is selected only according to pipe diameter, whether seldom verification regulating valve pressure at two ends difference is consistent with description, according to
Field verification learns that regulating valve both ends pressure difference is generally greater than specification and provides pressure difference, causes to open when operation according to preset temperature-
Actual flow is greater than preset flow when spending curve adjustment, and system entirety flow increases, and pump energy consumption increases.
In addition it can be difficult to which choose flow, lift calculates consistent water pump completely, the parameters of pump generally selected with design completely
It is greater than design value, but also flow, the lift of actual pump increase, pump energy consumption increases this factor.When end thermic load
It determines, flow system flow increases, and the temperature difference for running system reduces, that is, " the big flow, the small temperature difference " operation often said
Mode, pump energy consumption increase, and operating cost increases.
For this phenomenon, it is badly in need of designing a kind of new air-conditioner water system, can reduce water system operating flux, and then reduce
Pump energy consumption.
Utility model content
In view of the above shortcomings of the prior art, the purpose of this utility model is to provide a kind of energy-efficient air-conditioning water systems
System.
In order to achieve the above object, a kind of energy-efficient air-conditioner water system provided by the utility model, adopts the following technical scheme that
A kind of energy-efficient air-conditioner water system, including the end branch in parallel of frequency conversion refrigeration host computer, control cabinet and n, the n
>=2, the freezing in frequency conversion refrigeration host computer is supplied water through water pump pumps to each end, after the completion of end exchanges heat, then passes through water
Pump sends the chilled water pump after heat exchange back to frequency conversion refrigeration host computer, installs differential pressure pickup and motor-driven pressure-difference tune for water return pipeline always
Valve is saved, the upstream of each end branch is equipped with static balancing valve, and downstream is sequentially installed with regulating valve and differential pressure balancing valve (10),
The regulating valve that the frequency conversion refrigeration host computer, differential pressure pickup, motor-driven pressure-difference valve and end branch downstream are successively installed connects
Connect control cabinet.
Further, the end branch include end I, end II, end III ..., end n.
Further, the water pump configures pump variable frequency device, realizes frequency conversion function.
Further, the pump variable frequency device connects control cabinet.
Further, the energy-efficient air-conditioner water system further includes indoor and outdoor temperature detection device, the indoor and outdoor temperature
Detection device connects control cabinet.
Further, the temperature-detecting device is temperature sensor.
Further, the differential pressure pickup and motor-driven pressure-difference valve are installed on always on water return pipeline.
Compared with prior art, the application air-conditioner water system is more using static balancing valve, differential pressure balancing valve, pump variable frequency etc.
Kind mode solves the problems, such as that water pump energy consumption caused by " big flow, the small temperature difference " operational mode is excessively high in air conditioning water operation, together
When can better meet indoor occupant temperature requirement, and system configuration control cabinet, whole process are automatically performed, and have saved people
Power.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon:
Fig. 1 is the regulating characteristic curve of electric control valve；
Fig. 2 is the energy-efficient air-conditioner water system structural schematic diagram of the application；
Fig. 3 is static balancing valve scheme of installation；
Fig. 4 is pump characteristic；
Appended drawing reference in figure: 1- frequency conversion refrigeration host computer, 2- water pump, 3- pump variable frequency device, 4- control cabinet, 5- pressure difference sensing
Device, 6- motor-driven pressure-difference valve, 7- static balancing valve, the end 8- I, 9- regulating valve, 10- differential pressure balancing valve, the end 11- II,
The end 12- III, the end 13- n, 14- measuring mouth I, 15- measuring mouth II.
Specific embodiment
The utility model is described in detail combined with specific embodiments below.Following embodiment will be helpful to this field
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, various modifications and improvements can be made.
These are all within the protection scope of the present invention.
As shown in Fig. 2, a kind of energy-efficient air-conditioner water system, including the end in parallel of frequency conversion refrigeration host computer 1, control cabinet 4 and n
Branch is held, n >=2, the freezing in frequency conversion refrigeration host computer 1, which is supplied water, is pumped to each end by water pump 2, has exchanged heat in end
Cheng Hou, then frequency conversion refrigeration host computer 1 back to is sent the chilled water pump after heat exchange by water pump 2, it is passed always for water return pipeline installation pressure difference
Sensor 5 and motor-driven pressure-difference valve 6, the upstream of each end branch are equipped with static balancing valve 7, and downstream is sequentially installed with adjusting
Valve 9 and differential pressure balancing valve 10, the frequency conversion refrigeration host computer 1, differential pressure pickup 5, motor-driven pressure-difference valve 6 and end branch downstream
The regulating valve 9 successively installed is all connected with control cabinet 4.
In the present embodiment, the end branch include end I 8, end II 11, end III 12 ..., end n13.
The water pump 2 configures pump variable frequency device 3, realizes frequency conversion function；The pump variable frequency device 3 connects control cabinet 4；It is described
Energy-efficient air-conditioner water system further includes indoor and outdoor temperature detection device, and the indoor and outdoor temperature detection device connects control cabinet 4；
The temperature-detecting device is temperature sensor.The differential pressure pickup 5 and motor-driven pressure-difference valve 6 are installed on always for return pipe
On the road.
A kind of operational process of energy-efficient air-conditioner water system of the application is as follows:
The production freezing of frequency conversion refrigeration host computer 1 is supplied water, and the general supply water temperature that freezes is 7 DEG C, and water pump 2 is responsible for circulated refrigerated water,
By water pump 2 by chilled water send to end I 8, end II 11, end III 12 ..., end n13, end exchange heat after the completion of,
It freezes return water temperature to increase, then the high temperature chilled water after heat exchange is returned to frequency conversion refrigeration host computer 1 by water pump 2, and completion entirely follows
Ring process；
In each end branch, post debugging static balancing valve 7 is completed in project construction, and debugging is completed this valve locking, regulating valve 9
It is controlled by control cabinet 4, differential pressure balancing valve 10 includes spring members and can voluntarily adjust；
Control cabinet 4 monitors indoor and outdoor temperature (not marking in this figure), always for return water pressure difference.Control cabinet 4 passes through outdoor temp
The running frequency of degree control frequency conversion refrigeration host computer 1, the aperture of valve 9 is controlled to adjust by room temperature, passes through differential pressure pickup 5
Signal controls the frequency of pump variable frequency device 3 and the aperture of motor-driven pressure-difference valve 6.Control cabinet and frequency conversion refrigeration host computer, pressure difference pass
The circuit connection structure of sensor etc. and the frequency and motor-driven pressure-difference valve 6 that pump variable frequency device 3 how is controlled by signal
Aperture etc. belongs to the prior art, and details are not described herein.
The principle of the energy-efficient air-conditioner water system of the application:
For air-conditioner water system, the resistance of each end is not much different, and pipe resistance is much larger than end resistance, so end
The circulation resistance of loop where n13 is maximum, is the index circuit of system, and the drag size of the loop is the one big of pump selection
Foundation；And for loop where other ends, resistance is respectively less than index circuit resistance, so water pump is supplied to end I 8 ---
The available pressure of end (n-1) is bigger than normal, according to △ P=S*m2(△ P is end available pressure, and S is the resistance of end-equipment, m
To pass through the flow of end-equipment) it is found that end I 8 --- the flow of end (n-1) is bigger than normal, to return the flow of each end
Return design value, end available pressure can only be reduced or increases the pressure loss of other equipment, and reducing end available pressure must
So cause the available pressure of index circuit insufficient, so can only be real by the pressure loss of branch other equipment where increasing
It is existing, i.e., so that each branch is reached design discharge by installing valve, conventional air-conditioning water system installs a regulating valve in end branch
9, but regulating valve 9 be not can guarantee according to caliber type selection regulating valve resistance can lucky matching system, not can guarantee end
End equipment can reach design discharge, not can guarantee the comfort level of user.
Static balancing valve 7 has adjustable dial plate, has scale on dial plate, there are two measuring mouths for valve body: measuring mouth I 14 and measuring mouth
II 15 (as shown in Figure 3).In use, mating pressure measuring device is inserted into measuring mouth, the pressure at static balancing valve both ends is obtained
Difference, the scale provided according to static balancing valve producer and pressure difference relationship adjust dial plate, so that pipeline flow reaches design value.
After running, the variations such as outdoor temperature, indoor occupant, personnel's habit can cause indoor load to change, i.e., indoor
Temperature change after control cabinet 4 monitors room temperature variation, transmits signals to regulating valve 9,9 aperture of regulating valve variation, through end
Changes in flow rate completes room temperature adjustment process.In the process, due to changes in flow rate, each end branch both ends and regulating valve both ends
Pressure difference change.For each end branch, flow, pressure difference are required to change, according to △ P=S*m2It is found that last
The flow and the same Long-term change trend of pressure difference for holding branch need the flow of water pump and lift while increasing or decreasing.According to water pump
The requirement that characteristic curve (Fig. 4), flow and lift are unable to satisfy while increasing or decreasing.For regulating valve, according to foregoing teachings
The regulation performance of (Fig. 1), regulating valve can change with pressure at two ends and be changed, it may appear that flow and demand after valve opening variation
Flow mismatch, cause the demand of user to be unable to satisfy.It is obtained in conclusion water pump 2 and regulating valve 9 are not available family demand
Meet very well, room temperature is too high or too low.
After differential pressure balancing valve 10 is installed in each end, the pressure difference variation of branch can be undertaken by differential pressure balancing valve 10, be kept
The pressure difference at each 9 both ends of regulating valve is constant, guarantees that the regulation performance of each regulating valve 9 is constant.For water pump 2, pump variable frequency is installed
After device 3, water pump can carry out converting operation, the chilled water monitored using differential pressure pickup 5 always for return water pressure difference as variable frequency adjustment according to
According to the same Long-term change trend of realization flow system flow, lift.
The flow of frequency conversion refrigeration host computer 1 can not step-less adjustment, pump efficiency is very low when the flow of water pump 2 is too low, in order to protect
The minimum operation flow of frequency conversion refrigeration host computer 1 and water pump 2 is demonstrate,proved, while guaranteeing the Minimum requirements flow of end, therefore always for return water
Motor-driven pressure-difference valve 6 is designed between pipeline, when the minimum operation flow of frequency conversion refrigeration host computer 1 and water pump 2 is greater than end demand
When flow, motor-driven pressure-difference valve 6 is opened, partial freeze water supply is not involved in heat exchange and directly flows through motor-driven pressure-difference valve 6.
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims,
This has no effect on the substantive content of the utility model.
Claims (7)
1. a kind of energy-efficient air-conditioner water system, which is characterized in that in parallel including frequency conversion refrigeration host computer (1), control cabinet (4) and n
End branch, n >=2, the freezing in frequency conversion refrigeration host computer (1), which is supplied water, is pumped to each end by water pump (2), at end
It holds after the completion of exchanging heat, then frequency conversion refrigeration host computer (1) back to is sent the chilled water pump after heat exchange by water pump (2), always for return pipe
Road installation differential pressure pickup (5) and motor-driven pressure-difference valve (6), the upstream of each end branch are equipped with static balancing valve (7),
Downstream is sequentially installed with regulating valve (9) and differential pressure balancing valve (10), the frequency conversion refrigeration host computer (1), differential pressure pickup (5), electricity
The regulating valve (9) that dynamic pressure differential regulating valve (6) and end branch downstream are successively installed is all connected with control cabinet (4).
2. energy-efficient air-conditioner water system according to claim 1, which is characterized in that the end branch include end I (8),
End II (11), end III (12) ..., end n (13).
3. energy-efficient air-conditioner water system according to claim 1, which is characterized in that the water pump (2) configures pump variable frequency device
(3)。
4. energy-efficient air-conditioner water system according to claim 3, which is characterized in that pump variable frequency device (3) the connection control
Cabinet (4).
5. energy-efficient air-conditioner water system according to claim 1, which is characterized in that it further include indoor and outdoor temperature detection device,
The indoor and outdoor temperature detection device connects control cabinet (4).
6. energy-efficient air-conditioner water system according to claim 5, which is characterized in that the temperature-detecting device is temperature sensing
Device.
7. energy-efficient air-conditioner water system according to claim 1, which is characterized in that the differential pressure pickup (5) and electronic pressure
Differential regulating valve (6) is installed on always between water return pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822121868.3U CN209484770U (en) | 2018-12-18 | 2018-12-18 | A kind of energy-efficient air-conditioner water system |
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| CN201822121868.3U CN209484770U (en) | 2018-12-18 | 2018-12-18 | A kind of energy-efficient air-conditioner water system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594903A (en) * | 2020-05-28 | 2020-08-28 | 南京百源通能源技术有限公司 | Hydraulic balance control system and hydraulic balance control method |
| CN112665237A (en) * | 2020-12-17 | 2021-04-16 | 珠海格力电器股份有限公司 | Chilled water system flow control method and device and chilled water system |
| CN113623722A (en) * | 2021-08-19 | 2021-11-09 | 山东华迪智能技术有限公司 | Heating method and system based on terminal room temperature parameter |
| CN114198832A (en) * | 2021-12-21 | 2022-03-18 | 宁波奥克斯电气股份有限公司 | Air conditioning system, constant-current energy-saving control method and variable-current energy-saving control method |
-
2018
- 2018-12-18 CN CN201822121868.3U patent/CN209484770U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594903A (en) * | 2020-05-28 | 2020-08-28 | 南京百源通能源技术有限公司 | Hydraulic balance control system and hydraulic balance control method |
| CN112665237A (en) * | 2020-12-17 | 2021-04-16 | 珠海格力电器股份有限公司 | Chilled water system flow control method and device and chilled water system |
| CN113623722A (en) * | 2021-08-19 | 2021-11-09 | 山东华迪智能技术有限公司 | Heating method and system based on terminal room temperature parameter |
| CN114198832A (en) * | 2021-12-21 | 2022-03-18 | 宁波奥克斯电气股份有限公司 | Air conditioning system, constant-current energy-saving control method and variable-current energy-saving control method |
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