CN206377791U - A kind of central air-conditioning two stage pump air-conditioner water system - Google Patents
A kind of central air-conditioning two stage pump air-conditioner water system Download PDFInfo
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- CN206377791U CN206377791U CN201720029090.6U CN201720029090U CN206377791U CN 206377791 U CN206377791 U CN 206377791U CN 201720029090 U CN201720029090 U CN 201720029090U CN 206377791 U CN206377791 U CN 206377791U
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Abstract
The utility model discloses a kind of central air-conditioning two stage pump air-conditioner water system, including many handpiece Water Chilling Units, a water knockout drum, many two grades of water pumps, air-conditioner tail end equipment, a water collector, many one-level water pumps and the balance pipe between water knockout drum and water collector, wherein, described one-level water pump and two grades of water pumps use variable frequency pump, the balance pipe both sides are provided with a differential pressure measurement device, for measuring the pressure difference at balance pipe two ends and pressure difference signal being fed back to described one-level water pump, to control its operating frequency.The utility model reduces the operation energy consumption and operating cost of air-conditioning system, and makes system running state stable.
Description
Technical field
The utility model is related to central air conditioner system, more particularly to a kind of central air-conditioning two stage pump air-conditioner water system.
Background technology
At this stage, central air-conditioning Primary pump system using primary pump surely frequency operation, by the way of two stage pump converting operation,
Balance pipe is set between primary pump and two stage pump, the difference in flow to compensate primary pump and two stage pump.Handpiece Water Chilling Units constant flow is transported
OK, operation number of units is controlled according to the refrigeration requirement of system, and the operation number of units linkage corresponding with handpiece Water Chilling Units of primary pump is opened, stopped
Control.The operation number of units of two grades of water pumps is controlled according to the pressure difference of load side.There are following two problems in this scheme：
1st, frequency is run one-level water pump surely, and when two stage pump flow is less than one-level pump discharge, unnecessary air-conditioning supplies water by flat
Weighing apparatus pipe is back to return pipe, not by air conditioner end equipment, could not be contributed for the air-conditioning in room but consume water pump
Electric energy, waste the energy, add operating cost.
2nd, open one when the flow but refrigeration requirement that the traffic demand of two stage pump is more than primary pump offer are not reaching to more
When handpiece Water Chilling Units and one-level water pump, a part of air-conditioning backwater can be back to feed pipe by balance pipe, so as to occur：Two stage pump ring
The electronic valve opening increase → bis- of refrigerating capacity decline → air conditioner end equipment of the supply water temperature rise → air conditioner end equipment on road
Secondary pumping system water-carrying capacity demand further increases → and backwater amount increase → supply water temperature of balance pipe backflow further raises.This is
One " endless loop " from smoke into smother, is unfavorable for the stabilization and energy-saving run of system.
The content of the invention
The utility model proposes a kind of improved central air-conditioning two to solve technical problem present in above-mentioned prior art
Level pump air-conditioner water system.
The utility model proposes technical scheme be, a kind of central air-conditioning two stage pump air-conditioner water system, including many evaporation
Device, a water knockout drum, many two grades of water pumps, air-conditioner tail end equipment, a water collector, many one-level water pumps and located at water knockout drum and
Balance pipe between water collector, wherein, described one-level water pump and two grades of equal converting operations of water pump, the balance pipe both sides are provided with
One differential pressure measurement device, for measuring the pressure difference at balance pipe two ends and pressure difference signal being fed back to described one-level water pump, to control
Make its operating frequency.
The air-conditioner tail end equipment uses electric two-way valve（Adjustment type or switching mode）Control.
The balance pipe caliber is designed by the water-carrying capacity of separate unit maximum capacity handpiece Water Chilling Units.
By adjusting the operating frequency of one-level water pump, maintain the pressure of balance pipe both sides equal, and then realize one-level water pump
With the flow matches of two grades of water pumps.
The operating frequency minimum value of the one-level water pump, the lower limit allowed using handpiece Water Chilling Units allows lower limit with frequency converter
Higher value in both values.
Compared with prior art, the beneficial effects of the utility model are：
1st, primary pump converting operation, reduces the operation energy consumption and operating cost of air-conditioning system；
2nd, the process balance pipe that the air-conditioning backwater of the two stage pump circulatory system will not continue is back to feed pipe, it is to avoid two grades
Elevated " endless loop " phenomenon of pump loop supply water temperature.
Brief description of the drawings
Fig. 1 is schematic flow sheet of the present utility model.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and examples.
As shown in accompanying drawing -1, the utility model proposes central air-conditioning two stage pump air-conditioner water system include many and refrigeration machine
Evaporator 1, a water knockout drum 2, many two grades of water pumps 3, air-conditioner tail end equipment 4, a water collector 5, many one-level water pumps of group connection
6 and the balance pipe 7 between water knockout drum and water collector.The chilled water carried out with evaporator after heat exchange leads to water knockout drum,
Then delivered to by two grades of water pumps in air-conditioner tail end equipment, such as fan coil, water collector, one-level water are passed through after chilled water heating
It is pumped to evaporator circulation.
Handpiece Water Chilling Units in the utility model use variable cold water flow type equipment, and one-level water pump 6, two grades of water pumps 3 are adopted
Use variable frequency pump.Air-conditioner tail end equipment 4 can use fan coil or other air conditioner end equipments, and use electric two-way valve 9
Control.The caliber of balance pipe 7 is designed by the water-carrying capacity of separate unit maximum capacity handpiece Water Chilling Units.Differential pressure measurement device 8 is used to measure flat
The pressure differential of weighing apparatus pipe both sides, and feedback signal controls the operating frequency of one-level water pump.
Operation control strategy of the present utility model is as follows：
When balance pipe feed pipe lateral pressure is more than return pipe lateral pressure, reduce the operating frequency of one-level water pump；Work as balance
When pipe feed pipe lateral pressure is less than return pipe lateral pressure, increase the operating frequency of one-level water pump.By the fortune for adjusting one-level water pump
Turn frequency, maintain the pressure of balance pipe both sides equal, and then realize the flow matches of one-level water pump and two grades of water pumps.
When the lower limit or water-carrying capacity that the operating frequency of water pump is reduced to frequency converter are reduced to the lower limit of handpiece Water Chilling Units permission
During value, the operating frequency of water pump no longer diminishes, and now the unnecessary flow of one-level water pump is back to return pipe by balance pipe, with full
The demand that two grades of water pumps of foot are normally run.
The operation unit number control side of handpiece Water Chilling Units is identical with traditional control method, can be controlled according to refrigeration requirement,
It can be controlled according to compressor operating electric current.
The operation unit number control method of one-level water pump：According to system water-carrying capacity and pump efficiency monitor value, to water pump operation
Number of units is controlled.
The control method of two grades of water pumps is identical with traditional control method, can be controlled according to system for backwater pressure difference,
Other control methods can be taken.
The utility model can not only save the energy, and beneficial to the stable operation of system.
Above-described embodiment is merely to illustrate embodiment of the present utility model.It should be pointed out that for this area
Those of ordinary skill for, without departing from the concept of the premise utility, some deformations and change can also be made, this
A little deformations and change should all belong to protection domain of the present utility model.
Claims (5)
1. a kind of central air-conditioning two stage pump air-conditioner water system, including many evaporators, a water knockout drum, many two grades of water pumps, air-conditionings
End equipment, a water collector, many one-level water pumps and the balance pipe between water knockout drum and water collector, it is characterised in that
Described one-level water pump and two grades of pump variable frequency operations, the balance pipe both sides are provided with a differential pressure measurement device, flat for measuring
Pressure difference signal is simultaneously fed back to the one-level water pump by the pressure difference at weighing apparatus pipe two ends, to control its operating frequency.
2. the system as claimed in claim 1, it is characterised in that：The air-conditioner tail end equipment is controlled using electric two-way valve.
3. the system as claimed in claim 1, it is characterised in that：The balance pipe caliber is by separate unit maximum capacity handpiece Water Chilling Units
Water-carrying capacity is designed.
4. the system as claimed in claim 1, it is characterised in that：By adjusting the operating frequency of one-level water pump, balance pipe is maintained
The pressure of both sides is equal, and then realizes the flow matches of one-level water pump and two grades of water pumps.
5. the system as claimed in claim 1, it is characterised in that：The operating frequency minimum value of the one-level water pump, using cold water
The lower limit that unit allows allows the higher value in both lower limits with frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720029090.6U CN206377791U (en) | 2017-01-11 | 2017-01-11 | A kind of central air-conditioning two stage pump air-conditioner water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720029090.6U CN206377791U (en) | 2017-01-11 | 2017-01-11 | A kind of central air-conditioning two stage pump air-conditioner water system |
Publications (1)
| Publication Number | Publication Date |
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| CN206377791U true CN206377791U (en) | 2017-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720029090.6U Active CN206377791U (en) | 2017-01-11 | 2017-01-11 | A kind of central air-conditioning two stage pump air-conditioner water system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303770A (en) * | 2020-11-17 | 2021-02-02 | 深圳市柏涛蓝森国际建筑设计有限公司 | Central air-conditioning water system based on secondary pump and control method |
| CN112303771A (en) * | 2020-11-17 | 2021-02-02 | 深圳市柏涛蓝森国际建筑设计有限公司 | Central air conditioning system based on primary pump and control method |
| CN112443904A (en) * | 2020-09-25 | 2021-03-05 | 青岛海信日立空调系统有限公司 | Household water machine |
| CN113983675A (en) * | 2021-11-10 | 2022-01-28 | 上海观燃智能科技有限公司 | Bypass differential pressure variable frequency regulation air conditioner chilled water system and hydraulic balance method thereof |
| CN114877421A (en) * | 2022-04-21 | 2022-08-09 | 珠海格力机电工程有限公司 | Air conditioning water system, control method and air conditioning unit |
-
2017
- 2017-01-11 CN CN201720029090.6U patent/CN206377791U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443904A (en) * | 2020-09-25 | 2021-03-05 | 青岛海信日立空调系统有限公司 | Household water machine |
| CN112303770A (en) * | 2020-11-17 | 2021-02-02 | 深圳市柏涛蓝森国际建筑设计有限公司 | Central air-conditioning water system based on secondary pump and control method |
| CN112303771A (en) * | 2020-11-17 | 2021-02-02 | 深圳市柏涛蓝森国际建筑设计有限公司 | Central air conditioning system based on primary pump and control method |
| CN113983675A (en) * | 2021-11-10 | 2022-01-28 | 上海观燃智能科技有限公司 | Bypass differential pressure variable frequency regulation air conditioner chilled water system and hydraulic balance method thereof |
| CN113983675B (en) * | 2021-11-10 | 2023-10-10 | 上海观燃智能科技有限公司 | Bypass differential pressure variable frequency air conditioner chilled water adjusting system and hydraulic balance method thereof |
| CN114877421A (en) * | 2022-04-21 | 2022-08-09 | 珠海格力机电工程有限公司 | Air conditioning water system, control method and air conditioning unit |
| CN114877421B (en) * | 2022-04-21 | 2023-08-29 | 珠海格力机电工程有限公司 | Air conditioner water system, control method and air conditioner unit |
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