CN102901168A - Air-cooled heat pump cold/hot water machine set for improving partial load performance and control method thereof - Google Patents

Air-cooled heat pump cold/hot water machine set for improving partial load performance and control method thereof Download PDF

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Publication number
CN102901168A
CN102901168A CN201210371142XA CN201210371142A CN102901168A CN 102901168 A CN102901168 A CN 102901168A CN 201210371142X A CN201210371142X A CN 201210371142XA CN 201210371142 A CN201210371142 A CN 201210371142A CN 102901168 A CN102901168 A CN 102901168A
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China
Prior art keywords
refrigeration
heat
compressor
water
air
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Pending
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CN201210371142XA
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Chinese (zh)
Inventor
沈增友
汪方
张婷
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China Yangzi Group Chuzhou Yangzi Air Conditioner Co Ltd
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China Yangzi Group Chuzhou Yangzi Air Conditioner Co Ltd
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Priority to CN201210371142XA priority Critical patent/CN102901168A/en
Publication of CN102901168A publication Critical patent/CN102901168A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an air-cooled heat pump cold/hot water machine set for improving partial load performance and a control method thereof. The control machine set comprises a water side heat exchanger, air side heat exchangers, a refrigeration system and a control system and is characterized in that the refrigeration system is composed of a first refrigeration system and a second refrigeration system which are independent to each other, a first compressor and a second compressor are in parallel connection with the first refrigeration system, and a third compressor and a fourth compressor are in parallel connection with the second refrigeration system. A first air side heat exchanger corresponding to the first refrigeration system is formed by a pair of heat exchangers in parallel connection and a first independent fan; and a second air side heat exchanger corresponding to the second refrigeration system is formed by a pair of heat exchangers in parallel connection and a second independent fan. The air side heat exchanger of each refrigeration system is formed by parallel connection of two heat exchangers and shares an independent air system, starting and shutdown of each fan are independently controlled, a parallel-connection compressor unit is adopted, and each compressor can be started and shut down independently. On the premises that the cost is not increased, the partial load performance of the machine set is greatly improved, and the machine set is energy-saving in actual use.

Description

A kind of air-cooled heat-pump cold/Hot water units and control method thereof that improves part load performance
Technical field
The present invention relates to the air conditioner refrigerating technical field, specifically a kind of constant speed air-cooled heat-pump cold/Hot water units and control method thereof that improves part load performance.
Background technology
Along with the fast development of China's economy, the use of air-conditioning is increasingly extensive, and in various types of air-conditioning systems, air-cooled heat-pump cold/Hot water units is with its characteristics such as applied widely, easy to install, and proportion is increasing.
The whole year operation energy consumption of cold/hot water unit is relevant with the performance of cold/hot water unit, and the performance of cold/hot water unit mainly comprises full load performance and part load performance.Because the refrigeration duty of air-conditioning system always changes with the change of out door climatic parameter disturbance and indoor design condition, the time that air-conditioning system is moved under sub-load during cooling (heat supply) is more, so the most of the time all is to be in the operation at part load state in the actual moving process of cold/hot water unit, so the performance during cold/hot water unit sub-load is larger on the impact of its operation energy consumption.
Under the nominal condition condition of regulation, the refrigerating capacity of cold/hot water unit (heating capacity) and the ratio of energy consumption are called the Energy Efficiency Ratio EER(coefficient of performance of cold/hot water unit), it is the important indicator of sign cold/hot water units consumption.In the eighties of eighties of last century, the emphasis of energy-conservation research concentrates on the EER(COP that how to improve the cold/hot water unit always).But EER(COP) represented only is energy consumption under the nominal condition condition.Traditional design of air conditioning along with the minimizing of system loading, EER(COP) can significantly descend.In fact, the refrigerating capacity (heating capacity) of system loading and the cold/hot water unit situation of mating does not fully almost have.For this reason, must consider cold/hot water unit comprehensive energy consumption under various loads.Comprehensive part load performance coefficient IPLV is EER under 25%, 50%, 75% sub-load and full load situation or the weighted average of COP, and it provides good foundation for the part throttle characteristics of weighing the cold/hot water unit.
As mentioned above, existing cold/hot water unit is owing to not considering part load performance, and is not energy-conservation in actual use.
Summary of the invention
For overcoming the deficiency of existing cold/hot water unit part load performance, the object of the present invention is to provide a kind of raising part load performance air-cooled heat-pump cold/Hot water units.
Technical solution problem of the present invention adopts following technical scheme:
A kind of air-cooled heat-pump cold/Hot water units that improves part load performance, comprise water-side heat, air side heat exchanger, refrigeration system and control system, its design feature is, described refrigeration system is comprised of the first separate refrigeration system and the second refrigeration system, is parallel with compressor I and compressor II in the first refrigeration system; Be parallel with compressor III and compressor IV in the second refrigeration system; Air side heat exchanger I corresponding to the first refrigeration system is made of heat exchanger and the independent blower fan I of a pair of parallel connection; Air side heat exchanger II corresponding to the second refrigeration system is made of heat exchanger and the independent blower fan II of a pair of parallel connection.
Design feature of the present invention also is:
Described water-side heat is provided with water inlet and delivery port, also be provided with axially vertical deflection plate of a plurality of and water-side heat in the described water-side heat, two the adjacent deflection plates respectively corresponding up and down both sides that are fixed on water-side heat form circuitous up and down water stream channel; Be provided with the fluorine road heat-exchange tube of two groups of relative water (flow) direction arranged in series in the described water-side heat, after every group of heat-exchange tube was circuitous in water-side heat, its fluorine way outlet was positioned at the homonymy of fluorine road import.
Described refrigeration system comprises compressor, cross valve and the reservoir of gas-liquid separator, a pair of parallel connection, the liquid freon of the compressed machine boil down to of the freon of the gaseous state of low pressure HTHP flows into air side heat exchanger by cross valve, in the process of external world's heat radiation, be condensed into gradually high-pressure liquid freon; After the shunting capillary gathers, enter reservoir, become again the gas-liquid freon mixture of low-temp low-pressure by the step-down of throttling arrangement capillary; The freon of gas-liquid mixed enters water-side heat, constantly vaporizes by the heat that absorbs water in the water-side heat, and the temperature of water in the water-side heat is reduced, and freon becomes low-pressure gas, reenters compressor.
A kind of control method that improves the air-cooled heat-pump cold/Hot water units of part load performance, this unit comprises water-side heat, air side heat exchanger, refrigeration system and control system, its characteristics are, described refrigeration system is comprised of the first separate refrigeration system and the second refrigeration system, is parallel with compressor I and compressor II in the first refrigeration system; Be parallel with compressor III and compressor IV in the second refrigeration system; Air side heat exchanger I corresponding to the first refrigeration system is made of heat exchanger and the independent blower fan I of a pair of parallel connection; Air side heat exchanger II corresponding to the second refrigeration system is made of heat exchanger and the independent blower fan II of a pair of parallel connection;
(1) when running environment needs oepration at full load, control system is progressively finished the water pump of water-side heat and is opened, and the blower fan I is left, and the first refrigeration system compressor I, compressor II are opened; The blower fan II is left, and the second refrigeration system compressor III, compressor IV are opened;
(2) when running environment only needs 75% load operation, any compressor unloading in the step (1);
(3) when running environment only needs 50% load operation, the first refrigeration system and the second refrigeration system unload respectively a compressor in the step (1);
(4) when running environment only needs 25% load operation, wherein three compressors unloading in the first refrigeration system or the second refrigeration system in the step (1), a corresponding blower fan of refrigeration system of corresponding complete discharge cuts out simultaneously;
(5) when unit is out of service, control system is progressively finished the first refrigeration system compressor I, the unloading of compressor II, and the blower fan I is closed, and the second refrigeration system compressor III, compressor IV are closed, and the blower fan II is closed; The water pump of water-side heat closes.
Advantage of the present invention has: 1. each relative water (flow) direction of independent fluorine system of water-side heat is arranged in series, and by deflection plate, current alternately, repeatedly cross-current is crossed each fluorine system, and the discharge of each fluorine system equals the total discharge of unit; 2. the air side heat exchanger of each fluorine system is formed in parallel by two heat exchangers, a public wind system independently, each blower fan open, stop independent control, during corresponding fluorine system works, blower fan leaves, when corresponding fluorine system did not work, blower fan stopped; 3. adopt parallel compressor unit, each compressor can open separately, stop; 4. unit is upper/and unload and undertaken by specific program.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, unit of the present invention is under the prerequisite that cost does not increase, and comprehensive part load performance improves a lot, and actual use is more energy-conservation.
2, unit of the present invention is comprised of several less systems, and starting current is little, and is little to the impact of electrical network.
3, machine set compressor of the present invention can be intermittently, take turns to operate long service life.
4, a certain system of unit of the present invention breaks down does not affect the normal use of other system, and maintenance is convenient.
5, under the constant prerequisite of general power, the parts of refrigeration system of the present invention can adopt the small dimension model, have larger cost advantage.
Description of drawings
Fig. 1 is machine set system pie graph of the present invention.
Fig. 2 is air side heat exchanger structural representation of the present invention.
Fig. 3 is water-side heat structural representation of the present invention.
Number in the figure: 1 water-side heat, 11 water inlets, 12 delivery ports, 13 heat-exchange tubes, 14 fluorine way outlets, 15 fluorine road imports, 16 deflection plates, 21 compressor I, 22 compressor II, 23 air side heat exchanger I, 23a the first left side heat exchanger, 23b the second left side heat exchanger, 24 blower fan I, 31 compressor III, 32 compressor IV, 33 air side heat exchanger II, 34 blower fan II, 4 gas-liquid separators, 5 cross valves, 6 reservoirs, 7 shunting capillaries, 8 throttling arrangement capillaries, 9 dividing plates.
The specific embodiment
Below pass through the specific embodiment, and the invention will be further described by reference to the accompanying drawings.
The specific embodiment, non-limiting examples is as described below:
Embodiment:
As shown in Figure 1, air-cooled heat-pump cold/Hot water units comprises water-side heat 1, air side heat exchanger, refrigeration system and control system, refrigeration system is comprised of the first separate refrigeration system and the second refrigeration system, is parallel with compressor I 21 and compressor II 22 in the first refrigeration system; Be parallel with compressor III 31 and compressor IV 32 in the second refrigeration system; Air side heat exchanger I 23 corresponding to the first refrigeration system is made of heat exchanger and the independent blower fan I 24 of a pair of parallel connection; Air side heat exchanger II 33 corresponding to the second refrigeration system is made of heat exchanger and the independent blower fan II 34 of a pair of parallel connection.
As shown in Figure 3, water-side heat 1 is provided with water inlet 11 and delivery port 12, its two ends, left and right sides upside is set respectively, be provided with the fluorine road heat-exchange tube 13 of two groups of relative water (flow) direction arranged in series in the water-side heat, after every group of heat-exchange tube is circuitous in water-side heat, its fluorine way outlet 14 and fluorine road import 15 are located at the homonymy of water-side heat, also be provided with axially vertical deflection plate 16 of a plurality of and water-side heat in the water-side heat, two the adjacent deflection plates respectively corresponding up and down both sides that are fixed on water-side heat form circuitous up and down water stream channel, the staggered water stream channel that current form by deflection plate, repeatedly cross-current is crossed the heat-exchange tube of each refrigeration system, thereby the discharge of each system is equal to the total discharge of unit.When unit is in sub-load, such as 50%, then only open a refrigeration system, and the discharge that flows through remains unchanged, be equivalent to the twice of the required discharge of the normal coupling of this system.As everyone knows, but the heat transfer efficiency of raising discharge Effective Raise water-side heat, thereby the Energy Efficiency Ratio of raising refrigeration system.
As shown in Figure 2, air side heat exchanger is divided into four, and air side heat exchanger I 23 is composed in parallel by the first left side heat exchanger 23a and the first right side heat exchanger 23b, and shares a system fan I 24; Air side heat exchanger II 33 is composed in parallel by the second left side heat exchanger 33a and the second right side heat exchanger 33b, and shared blower fan II 34; Be separated to form two independently wind systems with dividing plate 9 between two groups of air side heat exchangers.Machine I 24, the second refrigeration systems of when the first refrigeration system is worked, only blowing in when work the machine II 34 of only blowing in, thereby but the performance of unit during the Effective Raise sub-load.
For further improving the part load performance of unit, each refrigeration system adopts the small dimension compressor of two parallel connections to substitute an original large compressor, each little compressor can open separately/stop, like this, only open a compressor when sub-load, and with respect to a compressor, the area of air side heat exchanger and water-side heat is equivalent to increase and is twice, discharge and air mass flow also are equivalent to increase be twice, thereby the part load performance of system significantly improves.
As shown in Figure 1, each refrigeration system mainly comprises compressor, cross valve 5, the reservoir 6 of gas-liquid separator 4, a pair of parallel connection, the liquid freon of the compressed machine boil down to of the freon of the gaseous state of low pressure HTHP flows into air side heat exchanger (being evaporimeter) by cross valve 5, in the process of external world's heat radiation, be condensed into gradually high-pressure liquid freon; After shunting capillary 7 gathers, enter reservoir 6, become again the gas-liquid freon mixture of low-temp low-pressure by 8 step-downs of throttling arrangement capillary; The freon of gas-liquid mixed enters water-side heat 1, constantly vaporizes by the heat that absorbs water in the water-side heat, and the temperature of water in the water-side heat is reduced, and freon becomes low-pressure gas, reenters compressor.
The control method of air-cooled heat-pump cold/Hot water units of the present invention is, when running environment needed oepration at full load, control system was progressively finished the water pump of water-side heat and opened (1), and the blower fan I is left, and the first refrigeration system compressor I, compressor II are opened; The blower fan II is left, and the second refrigeration system compressor III, compressor IV are opened;
(2) when running environment only needs 75% load operation, any compressor unloading in the step (1);
(3) when running environment only needs 50% load operation, the first refrigeration system and the second refrigeration system unload respectively a compressor in the step (1);
(4) when running environment only needs 25% load operation, wherein three compressors unloading in the first refrigeration system or the second refrigeration system in the step (1), a corresponding blower fan of refrigeration system of corresponding complete discharge cuts out simultaneously;
(5) when unit is out of service, control system is progressively finished the first refrigeration system compressor I, the unloading of compressor II, and the blower fan I is closed, and the second refrigeration system compressor III, compressor IV are closed, and the blower fan II is closed; The water pump of water-side heat closes.

Claims (4)

1. air-cooled heat-pump cold/Hot water units that improves part load performance, comprise water-side heat, air side heat exchanger, refrigeration system and control system, it is characterized in that, described refrigeration system is comprised of the first separate refrigeration system and the second refrigeration system, is parallel with compressor I and compressor II in the first refrigeration system; Be parallel with compressor III and compressor IV in the second refrigeration system; Air side heat exchanger I corresponding to the first refrigeration system is made of heat exchanger and the independent blower fan I of a pair of parallel connection; Air side heat exchanger II corresponding to the second refrigeration system is made of heat exchanger and the independent blower fan II of a pair of parallel connection.
2. a kind of air-cooled heat-pump cold/Hot water units that improves part load performance according to claim 1, it is characterized in that, described water-side heat is provided with water inlet and delivery port, also be provided with axially vertical deflection plate of a plurality of and water-side heat in the described water-side heat, two the adjacent deflection plates respectively corresponding up and down both sides that are fixed on water-side heat form circuitous up and down water stream channel; Be provided with the fluorine road heat-exchange tube of two groups of relative water (flow) direction arranged in series in the described water-side heat, after every group of heat-exchange tube was circuitous in water-side heat, its fluorine way outlet was positioned at the homonymy of fluorine road import.
3. a kind of air-cooled heat-pump cold/Hot water units that improves part load performance according to claim 1, it is characterized in that, described refrigeration system comprises compressor, cross valve and the reservoir of gas-liquid separator, a pair of parallel connection, the liquid freon of the compressed machine boil down to of the freon of the gaseous state of low pressure HTHP flows into air side heat exchanger by cross valve, in the process of external world's heat radiation, be condensed into gradually high-pressure liquid freon; After the shunting capillary gathers, enter reservoir, become again the gas-liquid freon mixture of low-temp low-pressure by the step-down of throttling arrangement capillary; The freon of gas-liquid mixed enters water-side heat, constantly vaporizes by the heat that absorbs water in the water-side heat, and the temperature of water in the water-side heat is reduced, and freon becomes low-pressure gas, reenters compressor.
4. control method that improves the air-cooled heat-pump cold/Hot water units of part load performance, this unit comprises water-side heat, air side heat exchanger, refrigeration system and control system, it is characterized in that, described refrigeration system is comprised of the first separate refrigeration system and the second refrigeration system, is parallel with compressor I and compressor II in the first refrigeration system; Be parallel with compressor III and compressor IV in the second refrigeration system; Air side heat exchanger I corresponding to the first refrigeration system is made of heat exchanger and the independent blower fan I of a pair of parallel connection; Air side heat exchanger II corresponding to the second refrigeration system is made of heat exchanger and the independent blower fan II of a pair of parallel connection;
(1) when running environment needs oepration at full load, control system is progressively finished the water pump of water-side heat and is opened, and the blower fan I is left, and the first refrigeration system compressor I, compressor II are opened; The blower fan II is left, and the second refrigeration system compressor III, compressor IV are opened;
(2) when running environment only needs 75% load operation, any compressor unloading in the step (1);
(3) when running environment only needs 50% load operation, the first refrigeration system and the second refrigeration system unload respectively a compressor in the step (1);
(4) when running environment only needs 25% load operation, wherein three compressors unloading in the first refrigeration system or the second refrigeration system in the step (1), a corresponding blower fan of refrigeration system of corresponding complete discharge cuts out simultaneously;
(5) when unit is out of service, control system is progressively finished the first refrigeration system compressor I, the unloading of compressor II, and the blower fan I is closed, and the second refrigeration system compressor III, compressor IV are closed, and the blower fan II is closed; The water pump of water-side heat closes.
CN201210371142XA 2012-09-28 2012-09-28 Air-cooled heat pump cold/hot water machine set for improving partial load performance and control method thereof Pending CN102901168A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103968594A (en) * 2014-05-28 2014-08-06 广东志高暖通设备股份有限公司 Air cooling heat pump unit
CN109442774A (en) * 2018-09-26 2019-03-08 广州市凌静制冷设备有限公司 A kind of air-cooled Cool-water Machine for Industry group of vortex

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CN201885474U (en) * 2010-11-01 2011-06-29 上海轨道交通设备发展有限公司 Cooling system for metro vehicle air-conditioning units
CN202371937U (en) * 2011-12-17 2012-08-08 史建 Non-bearing water source heat pump heat exchanger
CN202813627U (en) * 2012-09-28 2013-03-20 中国扬子集团滁州扬子空调器有限公司 Air cooling heat pump cold/hot water unit improving partial load performance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2366802Y (en) * 1999-05-04 2000-03-01 上海双鹿中野冷机有限公司 Air-cooling condenser used for two refrigerating system
CN1525109A (en) * 2003-02-25 2004-09-01 彭建华 Miniature ultrathin horizontal type suspended ceiling pendular water ring duplex system room air conditioner
CN201028861Y (en) * 2007-04-05 2008-02-27 中国扬子集团滁州扬子空调器有限公司 Multi-system module type air-cooled heat pump cold and hot water machine set
CN201522044U (en) * 2009-10-21 2010-07-07 山东安赛尔环境控制有限公司 Dual-system air conditioning unit
CN201856770U (en) * 2010-07-20 2011-06-08 上海科泰运输制冷设备有限公司 Rail traffic train air conditioning unit
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103968594A (en) * 2014-05-28 2014-08-06 广东志高暖通设备股份有限公司 Air cooling heat pump unit
CN109442774A (en) * 2018-09-26 2019-03-08 广州市凌静制冷设备有限公司 A kind of air-cooled Cool-water Machine for Industry group of vortex

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Application publication date: 20130130