CN104154636A - Centralized air-conditioner exhausted-air heat/cold energy recovery system - Google Patents
Centralized air-conditioner exhausted-air heat/cold energy recovery system Download PDFInfo
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- CN104154636A CN104154636A CN201410426441.8A CN201410426441A CN104154636A CN 104154636 A CN104154636 A CN 104154636A CN 201410426441 A CN201410426441 A CN 201410426441A CN 104154636 A CN104154636 A CN 104154636A
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- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 238000004378 air conditioning Methods 0.000 claims abstract description 16
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000011888 foil Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims description 2
- 239000011496 polyurethane foam Substances 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 238000010257 thawing Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 208000015181 infectious disease Diseases 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
本发明涉及一种集中式空调排风热（冷）回收系统，其目的是回收空调排风的热（冷）量、防止风冷热泵机组冬季结霜，提高机组效率，改善空调综合节能效果。本发明提出了一种将空调排风直接导入风冷式热泵机组进风端的热（冷）回收系统。利用空调系统夏季排风温度较室外温度低，冬季排风温度比室外高的特点，将排风导入风冷式机组进风端，大为改善热泵机组的夏季散热和冬季散冷效果，提高机组的制冷和制热效率，节约能耗；同时冬季室内排出的热风可以有效地阻止热泵机组结霜，从而节约了机组除霜能耗，改善了冬季室内舒适性。此外，本发明的热回收装置仅需增设连接风管，比常规的换热器热回收方式投资大为节省。
The invention relates to a centralized air-conditioning exhaust heat (cold) recovery system, the purpose of which is to recover the heat (cold) of the air-conditioning exhaust, prevent frosting of the air-cooled heat pump unit in winter, improve the efficiency of the unit, and improve the comprehensive energy-saving effect of the air conditioner. The invention proposes a heat (cold) recovery system that directs air-conditioning exhaust air into the air inlet end of an air-cooled heat pump unit. Utilizing the characteristic that the summer exhaust air temperature of the air conditioning system is lower than the outdoor temperature, and the winter exhaust air temperature is higher than the outdoor air temperature, the exhaust air is introduced into the air inlet of the air-cooled unit, which greatly improves the summer heat dissipation and winter cooling effect of the heat pump unit, and improves the unit. High cooling and heating efficiency, saving energy consumption; at the same time, the hot air discharged from the room in winter can effectively prevent the heat pump unit from frosting, thereby saving the energy consumption of the unit for defrosting and improving the indoor comfort in winter. In addition, the heat recovery device of the present invention only needs to add connecting air pipes, which greatly saves investment compared with conventional heat recovery methods of heat exchangers.
Description
技术领域 technical field
本发明涉及空调系统节能技术领域，特别是采用风冷热泵机组作为冷热源的集中式空调系统的排风热量（冷量）回收系统。 The invention relates to the technical field of energy-saving of air-conditioning systems, in particular to an exhaust heat (cooling capacity) recovery system of a centralized air-conditioning system using an air-cooled heat pump unit as a cold and heat source.
背景技术 Background technique
随着人民生活水平的提高，集中式空调（即中央空调）的应用越来越宽泛，其能耗也越来越大。采用技术手段节约空调能耗是十分重要的节能途径。目前，对于需要夏季供冷、冬季供暖的中小型集中式空调系统，其冷热源普遍采用的是风冷式热泵机组，而随着人们对室内空气品质要求的提高，新风量和相应的排风量普遍增加，有些对空气品质有特殊要求的建筑（如传染病房、动物实验中心等）甚至需要全新风的直流系统，其排风量巨大，如不采取某种热量（冷量）回收措施，空调总能耗会变得很大。 With the improvement of people's living standards, the application of centralized air conditioners (that is, central air conditioners) is becoming more and more extensive, and its energy consumption is also increasing. Using technical means to save energy consumption of air conditioners is a very important way to save energy. At present, for small and medium-sized centralized air-conditioning systems that require cooling in summer and heating in winter, air-cooled heat pump units are generally used as cold and heat sources. With the improvement of people's requirements for indoor air quality, fresh air volume and corresponding exhaust The air volume generally increases, and some buildings with special requirements on air quality (such as infectious disease wards, animal experiment centers, etc.) even require a direct-flow system of fresh air, which has a huge exhaust air volume. If some heat (cooling) recovery measures are not taken , the total energy consumption of the air conditioner will become very large.
目前，集中式空调系统排风热（冷）回收的主要方式是将排风和新风分别引至间壁式换热器的两侧进行换热，利用室内排风的热量（或冷量）来预热（或预冷）室外新风，从而减少热泵机组负荷，节约能耗。但这种热回收方式存在诸多缺点：首先，间壁式换热器两侧需要较大的传热温差，否则传热效果不佳，热回收率低；其次，换热器价格较贵，初投资或改造费用较高；再次，换热器存在漏风，对传染病房等需要防止交叉感染的场合，不允许采用这种热回收方式。另一方面，风冷热泵机组冬季运行都需要某种除霜手段，目前采用的主要措施是通过系统的逆向循环来实现的，即利用热泵双向制热制冷。冬季运行时，按一定的除霜周期将机组切换到制冷状态，从而达到风侧换热器周期性除霜的目的。采用这种措施主要存在以下问题：其一，除霜周期内，室内温度降低，影响舒适性；其二，除霜周期消耗额外的电能，增加机组能耗；其三，冬季制热制冷切换动作频繁，噪声大，设备易磨损，影响机组寿命。 At present, the main way of recovering heat (cold) from exhaust air in centralized air-conditioning systems is to guide the exhaust air and fresh air to both sides of the partition heat exchanger for heat exchange, and use the heat (or cold) of the indoor exhaust air to pre-heat Heat (or pre-cool) outdoor fresh air, thereby reducing the load of heat pump units and saving energy consumption. However, there are many disadvantages in this heat recovery method: first, a large heat transfer temperature difference is required on both sides of the partition wall heat exchanger, otherwise the heat transfer effect is not good and the heat recovery rate is low; second, the heat exchanger is expensive and the initial investment Or the cost of transformation is high; again, there is air leakage in the heat exchanger, and this heat recovery method is not allowed in places where cross-infection needs to be prevented, such as in infectious wards. On the other hand, air-cooled heat pump units need some kind of defrosting means to operate in winter. The main measure currently adopted is to realize the reverse cycle of the system, that is, to use heat pumps for two-way heating and cooling. During winter operation, the unit is switched to the cooling state according to a certain defrosting cycle, so as to achieve the purpose of periodic defrosting of the air side heat exchanger. There are mainly the following problems in adopting this measure: first, during the defrosting cycle, the indoor temperature drops, which affects the comfort; second, the defrosting cycle consumes extra electric energy and increases the energy consumption of the unit; third, the switching action of heating and cooling in winter Frequent, loud noise, easy wear and tear of equipment, affecting the life of the unit.
发明内容 Contents of the invention
为了克服上述技术的不足，本发明提出了一种将空调排风直接导入风冷式热泵机组进风端的热（冷）回收系统。利用空调系统夏季排风温度较室外温度低，冬季排风温度比室外高的特点，将排风导入风冷式机组进风端，可以大为改善热泵机组的夏季散热和冬季散冷效果，提高机组的制冷和制热效率，节约能耗；同时冬季室内排出的热风可以有效地阻止热泵机组结霜，从而节约了机组除霜能耗，改善了冬季室内舒适性。此外，本发明的热回收装置仅需增设连接风管，比常规的换热器热回收方式投资大为节省。 In order to overcome the deficiencies of the above technologies, the present invention proposes a heat (cold) recovery system that directs the exhaust air from the air conditioner into the air inlet end of the air-cooled heat pump unit. Taking advantage of the characteristics of the air conditioning system that the exhaust air temperature in summer is lower than the outdoor temperature, and the exhaust air temperature in winter is higher than the outdoor temperature, the exhaust air is introduced into the air inlet of the air-cooled unit, which can greatly improve the cooling effect of the heat pump unit in summer and winter. The cooling and heating efficiency of the unit saves energy consumption; at the same time, the hot air discharged from the room in winter can effectively prevent the heat pump unit from frosting, thereby saving the energy consumption of the unit for defrosting and improving the indoor comfort in winter. In addition, the heat recovery device of the present invention only needs to add connecting air pipes, which greatly saves investment compared with conventional heat recovery methods of heat exchangers.
本发明所采用的技术方案是：提出了一种风冷热泵机组集中空调排风热（冷）回收系统，该系统包括屋顶、排风管、排风导风管、排风引入口、机组进风口、风冷式热泵机组以及风机。其中排风管出口端与排风导风管进口端连通，排风导风管出口端与排风引入口连通，排风热(冷)回收系统引入了左右两个排风导风管。 The technical solution adopted in the present invention is: a centralized air-conditioning exhaust heat (cold) recovery system for an air-cooled heat pump unit is proposed, the system includes a roof, an exhaust pipe, an exhaust air guide pipe, an exhaust air inlet, and a unit inlet. Air vents, air-cooled heat pump units and fans. Wherein the outlet end of the exhaust pipe is connected with the inlet end of the exhaust air guide pipe, the outlet end of the exhaust air guide pipe is connected with the exhaust air inlet, and the exhaust air heat (cold) recovery system has introduced two left and right exhaust air guide pipes.
原来直接排放至室外的排风由排风管进入排风导风管内，再通过排风引入口引进风冷式热泵机组内，同时周围空气从四周的进风口进入机组。在夏季，排风与周围空气的混合气体可以对机组内的冷凝器进行降温，在冬季，可以给机组蒸发器加热，从而防止了其低温环境下结霜的问题。风冷式热泵机组上的风机可以促进风冷式机组气流的流动速度，避免气流短路，使得气流可以顺利从上方排出。 Originally, the exhaust air that is directly discharged to the outside enters the exhaust air duct through the exhaust pipe, and then is introduced into the air-cooled heat pump unit through the exhaust air inlet, and at the same time, the surrounding air enters the unit from the surrounding air inlets. In summer, the mixed gas of exhaust air and surrounding air can cool down the condenser in the unit, and in winter, it can heat the evaporator of the unit, thus preventing the problem of frosting in the low temperature environment. The fan on the air-cooled heat pump unit can promote the flow speed of the airflow of the air-cooled unit, avoid the short circuit of the airflow, and allow the airflow to be discharged from the top smoothly.
与现有技术相比，本发明所具有的有益效果为：利用空调系统夏季排风温度较室外温度低，冬季排风温度比室外高的特点，将排风直接导入风冷式机组进风端，改善了热泵机组的夏季散热和冬季散冷效果，提高了机组的制冷和制热效率，节约了空调能耗；同时冬季室内排出的热风可以有效地阻止热泵机组结霜，从而节约了机组除霜能耗，改善了冬季室内舒适性。本发明的热回收装置仅需增设连接风管，比常规的换热器回收方式投资大为节省，而综合节能效果提高10%-15%。 Compared with the prior art, the beneficial effect of the present invention is that the exhaust air temperature of the air-conditioning system is lower than the outdoor temperature in summer and higher than the outdoor air temperature in winter, and the exhaust air is directly introduced into the air inlet end of the air-cooled unit , which improves the cooling effect of the heat pump unit in summer and winter, improves the cooling and heating efficiency of the unit, and saves the energy consumption of the air conditioner; at the same time, the hot air discharged from the room in winter can effectively prevent the heat pump unit from frosting, thereby saving the defrosting of the unit. Energy consumption, improving indoor comfort in winter. The heat recovery device of the present invention only needs to add connecting air pipes, which greatly saves investment compared with conventional heat exchanger recovery methods, and the comprehensive energy-saving effect is increased by 10%-15%.
附图说明 Description of drawings
图1为一种集中式空调排风热（冷）回收系统图。 Figure 1 is a diagram of a centralized air-conditioning exhaust heat (cold) recovery system.
具体实施方式 Detailed ways
为了方便施工与安装，减少连接管道长度，本发明的系统一般应布置在屋顶，如图1所示：包括屋顶1、排风管2、排风导风管3、排风引入口4、机组进风口5、风冷式热泵机组6以及风机7。其中排风管出口端2与排风导风管3进口端连通，排风导风管3出口端与排风引入口4连通。排风热(冷)回收系统引入了左右两个排风导风管3。排风引入口4位于机组进风口5正下方，并向外引出30厘米，用于将排风引入热泵机组中。排风导风管3为圆形风管，其保温材料为聚氨酯泡沫，厚度为25毫米，保温层外附着一层铝箔保护层，其厚度为10毫米。排风引入口4与排风导风管3的接口则采用法兰连接。 In order to facilitate construction and installation and reduce the length of connecting pipes, the system of the present invention should generally be arranged on the roof, as shown in Figure 1: including roof 1, exhaust pipe 2, exhaust air guide pipe 3, exhaust air inlet 4, unit Air inlet 5, air-cooled heat pump unit 6 and fan 7. Wherein the outlet end 2 of the exhaust pipe is connected with the inlet end of the exhaust air guide pipe 3 , and the outlet end of the exhaust air guide pipe 3 is connected with the exhaust air inlet 4 . Exhaust air heat (cold) recovery system has introduced left and right two exhaust air ducts 3. The exhaust air inlet 4 is located directly below the air inlet 5 of the unit, and is drawn out by 30 cm for introducing the exhaust air into the heat pump unit. The exhaust air guide pipe 3 is a circular air duct, and its insulation material is polyurethane foam with a thickness of 25 millimeters, and one deck of aluminum foil protective layer is attached outside the insulation layer, and its thickness is 10 millimeters. The interface between the exhaust air inlet 4 and the exhaust air duct 3 is connected by a flange.
原来直接排放至室外的排风由排风管2进入排风导风管3内，再通过排风引入口4引进风冷式热泵机组6内，同时周围空气从四周的进风口5进入机组。在夏季，排风与周围空气的混合气体可以对机组内的冷凝器进行降温，在冬季，其可以给机组蒸发器加热，从而防止了其低温环境下结霜的问题。风冷式热泵机组6上的风机7可以促进风冷式机组气流的流动速度，避免气流短路，使得气流可以顺利从上方排出。 The original exhaust air directly discharged to the outside enters the exhaust air guide pipe 3 through the exhaust pipe 2, and then is introduced into the air-cooled heat pump unit 6 through the exhaust air inlet 4, and the surrounding air enters the unit from the surrounding air inlet 5. In summer, the mixed gas of exhaust air and surrounding air can cool down the condenser in the unit, and in winter, it can heat the evaporator of the unit, thus preventing the problem of frosting in the low temperature environment. The fan 7 on the air-cooled heat pump unit 6 can promote the flow velocity of the airflow of the air-cooled unit, avoid the short circuit of the airflow, so that the airflow can be smoothly discharged from above.
Claims (4)
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| CN201410426441.8A CN104154636A (en) | 2014-08-27 | 2014-08-27 | Centralized air-conditioner exhausted-air heat/cold energy recovery system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352454A (en) * | 2016-09-30 | 2017-01-25 | 华中科技大学 | Hybrid air-conditioning system based on ground source and air source |
| CN109812951A (en) * | 2019-03-27 | 2019-05-28 | 同济大学 | Efficiency-enhancing system device for low-grade heat in the exhaust air of direct-current air conditioners containing harmful media |
| CN109838858A (en) * | 2017-11-28 | 2019-06-04 | 刘慧官 | Package type air cooler |
| CN110425689A (en) * | 2019-06-18 | 2019-11-08 | 珠海格力电器股份有限公司 | Air conditioner control method, terminal and computer readable medium |
-
2014
- 2014-08-27 CN CN201410426441.8A patent/CN104154636A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352454A (en) * | 2016-09-30 | 2017-01-25 | 华中科技大学 | Hybrid air-conditioning system based on ground source and air source |
| CN109838858A (en) * | 2017-11-28 | 2019-06-04 | 刘慧官 | Package type air cooler |
| CN109812951A (en) * | 2019-03-27 | 2019-05-28 | 同济大学 | Efficiency-enhancing system device for low-grade heat in the exhaust air of direct-current air conditioners containing harmful media |
| CN109812951B (en) * | 2019-03-27 | 2024-02-09 | 同济大学 | DC air conditioners contain harmful medium exhaust air and are efficiency-enhancing system devices for low-grade heat |
| CN110425689A (en) * | 2019-06-18 | 2019-11-08 | 珠海格力电器股份有限公司 | Air conditioner control method, terminal and computer readable medium |
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