CN203286825U - Defrosting device of air source heat pump - Google Patents

Defrosting device of air source heat pump Download PDF

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CN203286825U
CN203286825U CN2013202639932U CN201320263993U CN203286825U CN 203286825 U CN203286825 U CN 203286825U CN 2013202639932 U CN2013202639932 U CN 2013202639932U CN 201320263993 U CN201320263993 U CN 201320263993U CN 203286825 U CN203286825 U CN 203286825U
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finned tube
heat exchanger
valve
way valve
tube exchanger
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梁彩华
汪峰
张小松
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Southeast University
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Southeast University
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Abstract

本实用新型公开了一种空气源热泵除霜装置,包括压缩机、四通阀、气液分离器、换热器、储液器、过滤器、第一翅片管换热器、第二翅片管换热器、设置在第一翅片管换热器空气进口的第一电动风门、设置在第二翅片管换热器空气进口的第二电动风门、设置在两个翅片管换热器空气出口处的风机,以及设置在管路上的第一电磁阀、第二电磁阀、第一单向阀、第二单向阀、第三单向阀、第四单向阀、第五单向阀、第六单向阀、电子膨胀阀和第三电磁阀。本实用新型装置的温度波动很小,提高了空调系统的舒适性,使系统除霜过程总的时间缩短,提高热泵系统的单位时间供热率。

The utility model discloses an air source heat pump defrosting device, which comprises a compressor, a four-way valve, a gas-liquid separator, a heat exchanger, a liquid storage device, a filter, a first fin tube heat exchanger, a second fin tube Fin-tube heat exchanger, the first electric damper set at the air inlet of the first fin-tube heat exchanger, the second electric damper set at the air inlet of the second fin-tube heat exchanger, and the second electric damper set at the air inlet of the two fin-tube heat exchangers The fan at the air outlet of the heater, and the first solenoid valve, the second solenoid valve, the first one-way valve, the second one-way valve, the third one-way valve, the fourth one-way valve, the fifth one-way valve arranged on the pipeline One-way valve, sixth one-way valve, electronic expansion valve and third solenoid valve. The temperature fluctuation of the device of the utility model is very small, the comfort of the air conditioning system is improved, the total time of the defrosting process of the system is shortened, and the heat supply rate per unit time of the heat pump system is improved.

Description

空气源热泵除霜装置Air source heat pump defrosting device

技术领域 technical field

本实用新型属于制冷空调系统设计和制造的技术领域,涉及一种空气源热泵系统的除霜方法及其实现这方法的装置。 The utility model belongs to the technical field of design and manufacture of refrigeration and air-conditioning systems, and relates to a defrosting method for an air source heat pump system and a device for realizing the method.

背景技术 Background technique

空气源热泵具有节能、兼顾供冷供热、使用灵活、方便、初投资少、所占空间小等优点在我国大部分地区得到广泛应用。但空气源热泵在冬季制热运行时遇到的最大问题是蒸发器表面结霜,由于霜层的形成与增长,加大了蒸发器表面与空气间的传热热阻,增加了空气流过蒸发器时的流动阻力,使得经过蒸发器的空气流量下降,换热效率明显降低,导致由空气和蒸发器之间换热量下降,热泵机组工作状况恶化,性能下降,甚至不能正常工作。因此空气源热泵在结霜条件下运行时必须适时除霜。 Air source heat pumps have the advantages of energy saving, cooling and heating, flexible use, convenience, low initial investment, and small space occupation, and have been widely used in most areas of our country. However, the biggest problem encountered by air source heat pumps during heating operation in winter is the frosting on the surface of the evaporator. Due to the formation and growth of the frost layer, the heat transfer resistance between the surface of the evaporator and the air is increased, and the flow of air is increased. The flow resistance of the evaporator makes the air flow through the evaporator decrease, and the heat exchange efficiency is significantly reduced, resulting in a decrease in the heat exchange between the air and the evaporator, the deterioration of the working condition of the heat pump unit, the decline in performance, and even malfunction. Therefore, when the air source heat pump is operating under frosting conditions, it must be defrosted in time.

目前对空气源热泵常用的除霜方法是通过系统逆向循环(运行制冷循环)来实现,即将制热时与空气进行换热的吸收热量的蒸发器,除霜时变成冷凝器,原来的冷凝器变成蒸发器。这种传统的逆向除霜方法存在一系列弊端:除霜时由于四通阀换向,制冷系统原来的高低压部分切换,这使制冷系统压缩机出现“奔油”现象,降低压缩机的可靠性和使用寿命;除霜时制冷剂要从供热系统中吸取热量用于除霜,造成供热系统温度急剧波动,因而影响空调系统的舒适性;同时从除霜开始到除霜结束,四通阀要动作两次,系统的高低压部分(蒸发器与冷凝器)需切换两次再重新建立压力和温度平衡,这不仅造成大量能量损失而且使系统除霜过程总的时间加长。 At present, the defrosting method commonly used for air source heat pumps is realized through the reverse cycle of the system (running the refrigeration cycle), that is, the evaporator that absorbs heat and exchanges heat with the air during heating becomes a condenser during defrosting, and the original condensation The device becomes an evaporator. This traditional reverse defrosting method has a series of disadvantages: when defrosting, due to the reversing of the four-way valve, the original high and low pressure parts of the refrigeration system are switched, which causes the compressor of the refrigeration system to "run oil" and reduces the reliability of the compressor. performance and service life; when defrosting, the refrigerant needs to absorb heat from the heating system for defrosting, causing sharp fluctuations in the temperature of the heating system, thus affecting the comfort of the air conditioning system; at the same time, from the beginning of defrosting to the end of defrosting, four The through valve needs to be operated twice, and the high and low pressure parts of the system (evaporator and condenser) need to be switched twice to re-establish the pressure and temperature balance, which not only causes a large amount of energy loss but also prolongs the total time of the system defrosting process.

实用新型内容 Utility model content

技术问题:本实用新型的目的是为解决现有逆向除霜方式给制冷系统所带来的诸多弊端,提供一种可靠性高,缩短除霜时间,改善除霜效果,提高热泵机组供热效率和空调系统舒适性的空气源热泵除霜装置。        Technical problem: The purpose of this utility model is to solve the many disadvantages brought by the existing reverse defrosting method to the refrigeration system, to provide a high reliability, shorten the defrosting time, improve the defrosting effect, and improve the heating efficiency of the heat pump unit. Air source heat pump defrosting device for comfort and air conditioning system.

技术方案:本实用新型的空气源热泵除霜装置,包括压缩机、四通阀、气液分离器、换热器、储液器、过滤器、第一翅片管换热器、第二翅片管换热器、设置在第一翅片管换热器空气进口的第一电动风门、设置在第二翅片管换热器空气进口的第二电动风门、设置在两个翅片管换热器空气出口处的风机,以及设置在管路上的第一电磁阀、第二电磁阀、第一单向阀、第二单向阀、第三单向阀、第四单向阀、第五单向阀、第六单向阀、电子膨胀阀和第三电磁阀。 Technical solution: The air source heat pump defrosting device of the present utility model includes a compressor, a four-way valve, a gas-liquid separator, a heat exchanger, a liquid storage device, a filter, a first fin tube heat exchanger, a second fin tube Fin-tube heat exchanger, the first electric damper set at the air inlet of the first fin-tube heat exchanger, the second electric damper set at the air inlet of the second fin-tube heat exchanger, and the second electric damper set at the air inlet of the two fin-tube heat exchangers The fan at the air outlet of the heater, and the first solenoid valve, the second solenoid valve, the first one-way valve, the second one-way valve, the third one-way valve, the fourth one-way valve, the fifth one-way valve arranged on the pipeline One-way valve, sixth one-way valve, electronic expansion valve and third solenoid valve.

四通阀上设置有四通阀第一输入端、四通阀第一输出端、四通阀第二输入端和四通阀第二输出端,换热器上设置有换热器输入端和换热器输出端,第一翅片管换热器上设置有第一翅片管换热器输入端和第一翅片管换热器输出端,第二翅片管换热器上设置有第二翅片管换热器输入端和第二翅片管换热器输出端。压缩机的输出端接四通阀第一输入端,四通阀第二输入端通过第一电磁阀与换热器输入端连接,同时也通过第二电磁阀与第二翅片管换热器输入端连接,四通阀第一输出端分为两路,一路与第一翅片管换热器输入端连接,另一路通过第三电磁阀与第二翅片管换热器输入端连接,四通阀第二输出端与气液分离器的输入端连接,气液分离器的输出端与压缩机的输入端连接; The four-way valve is provided with a first input end of the four-way valve, a first output end of the four-way valve, a second input end of the four-way valve and a second output end of the four-way valve, and the heat exchanger is provided with an input end of the heat exchanger and The output end of the heat exchanger, the first finned tube heat exchanger is provided with the input end of the first finned tube heat exchanger and the output end of the first finned tube heat exchanger, and the second finned tube heat exchanger is provided with The input end of the second finned tube heat exchanger and the output end of the second finned tube heat exchanger. The output end of the compressor is connected to the first input end of the four-way valve, and the second input end of the four-way valve is connected to the input end of the heat exchanger through the first electromagnetic valve, and is also connected to the second finned tube heat exchanger through the second electromagnetic valve. The input end is connected, the first output end of the four-way valve is divided into two circuits, one is connected to the input end of the first finned tube heat exchanger, and the other is connected to the input end of the second finned tube heat exchanger through the third solenoid valve, The second output end of the four-way valve is connected to the input end of the gas-liquid separator, and the output end of the gas-liquid separator is connected to the input end of the compressor;

换热器输出端同时与第一单向阀的入口和第二单向阀的出口连接,第一单向阀的出口分成三路,一路接储液器的输入端,一路通过第三单向阀与第二翅片管换热器输出端连接,另外一路通过第四单向阀与第一翅片管换热器输出端连接,储液器的输出端通过过滤器与电子膨胀阀的输入端连接,电子膨胀阀的输出端分成三路,一路与第二单向阀的输入端连接,一路通过第五单向阀与第二翅片管换热器输出端连接,另外一路通过第六单向阀与第一翅片管换热器输出端连接。 The output end of the heat exchanger is connected to the inlet of the first one-way valve and the outlet of the second one-way valve at the same time. The valve is connected to the output end of the second finned tube heat exchanger, the other one is connected to the output end of the first finned tube heat exchanger through the fourth one-way valve, and the output end of the liquid reservoir is connected to the input port of the electronic expansion valve through a filter The output end of the electronic expansion valve is divided into three paths, one path is connected to the input end of the second check valve, one path is connected to the output end of the second finned tube heat exchanger through the fifth one-way valve, and the other path is connected through the sixth The one-way valve is connected with the output end of the first finned tube heat exchanger.

本实用新型装置中,压缩机为变频压缩机或可实现能量调节的压缩机。 In the device of the utility model, the compressor is a variable frequency compressor or a compressor capable of energy regulation.

本实用新型装置中,当第一翅片管换热器除霜时,第一电动风门关闭,第二电动风门打开;当第二翅片管换热器除霜时,第一电动风门打开,第二电动风门关闭。 In the device of the utility model, when the first finned tube heat exchanger is defrosted, the first electric damper is closed and the second electric damper is opened; when the second finned tube heat exchanger is defrosted, the first electric damper is opened, The second electric damper is closed.

本实用新型装置中,第一翅片管换热器除霜时, 第二翅片管换热器作为蒸发器从空气中吸热;第二翅片管换热器除霜时, 第二翅片管换热器作为蒸发器从空气中吸热。 In the device of the present invention, when the first finned tube heat exchanger is defrosted, the second finned tube heat exchanger acts as an evaporator to absorb heat from the air; when the second finned tube heat exchanger is defrosted, the second finned tube heat exchanger The fin-and-tube heat exchanger acts as an evaporator to absorb heat from the air.

空气源热泵夏季制冷模式运行时:低温低压的制冷剂气体从气液分离器中被压缩机吸入、压缩后变成高温高压过热蒸气排出,经过四通阀后从四通阀第一输出端出来后分成两路,分别进入第一翅片管换热器和通过第三电磁阀进入第二翅片管换热器,此时第二电磁阀关闭,在第一翅片管换热器和第二翅片管换热器中,制冷剂与空气换热,放出热量冷凝成液体,然后分别从第一翅片管换热器、第二翅片管换热器出来后又分别经过第四单向阀、第三单向阀后汇合进入储液器,然后依次经过过滤器、电子膨胀阀后变成低温低压的气液两相,再经过第二单向阀后进入换热器,制冷剂在换热器中吸热蒸发,放出冷量,制冷剂完全蒸发后变成过热气体从换热器出来后经过第一电磁阀、四通阀进入气液分离器,然后再次被吸入压缩机,从而完成制冷循环,此时第一电动风门、第二电动风门都打开,风机工作。 When the air source heat pump is running in summer cooling mode: the low-temperature and low-pressure refrigerant gas is sucked by the compressor from the gas-liquid separator, compressed and becomes high-temperature and high-pressure superheated vapor, and then discharged, and then comes out from the first output port of the four-way valve after passing through the four-way valve After that, it is divided into two paths, respectively entering the first finned tube heat exchanger and entering the second finned tube heat exchanger through the third electromagnetic valve. At this time, the second electromagnetic valve is closed. In the two-finned tube heat exchanger, the refrigerant exchanges heat with the air, releases heat and condenses into a liquid, and then passes through the fourth unit after coming out of the first finned tube heat exchanger and the second finned tube heat exchanger respectively. After the one-way valve and the third one-way valve, they merge into the liquid reservoir, and then pass through the filter and the electronic expansion valve in turn to become a low-temperature and low-pressure gas-liquid two-phase, and then enter the heat exchanger after passing through the second one-way valve. The heat is absorbed and evaporated in the heat exchanger, and the cooling capacity is released. After the refrigerant is completely evaporated, it becomes a superheated gas. After coming out of the heat exchanger, it enters the gas-liquid separator through the first solenoid valve and the four-way valve, and then is sucked into the compressor again. Thereby, the refrigeration cycle is completed, and now the first electric damper and the second electric damper are all opened, and the blower fan works.

空气源热泵冬季制热模式运行时:气液分离器中低温低压的制冷剂气体被压缩机吸入、压缩后排出进入四通阀,从四通阀第二输入端出来后经过第一电磁阀进入换热器,此时第二电磁阀关闭,制冷剂在换热器中放出热量,冷凝成液体后流出,经过第一单向阀进入储液器,制冷剂从储液器出来后经过过滤器、电子膨胀阀被节流成气液两相后,分成两路,一路经过第五单向阀进入第二翅片管换热器,另外一路经过第六单向阀进入第一翅片管换热器,制冷剂分别在两个换热器中与空气换热,吸收热量后变成过热蒸气,制冷剂从第一翅片管换热器出来后与从第二翅片管换热器出来后经过第三电磁阀的制冷剂汇合后进入四通阀,从四通阀第二输出端出来后进入气液分离器,然后再次被吸入压缩机,从而完成循环,此时第一电动风门、第二电动风门都打开,风机工作。 When the air source heat pump is running in winter heating mode: the low-temperature and low-pressure refrigerant gas in the gas-liquid separator is sucked by the compressor, compressed, and then discharged into the four-way valve. Heat exchanger, at this time the second solenoid valve is closed, the refrigerant releases heat in the heat exchanger, condenses into a liquid and then flows out, and enters the liquid receiver through the first one-way valve, and the refrigerant passes through the filter after coming out of the liquid receiver 1. After the electronic expansion valve is throttled into gas-liquid two-phase, it is divided into two paths, one path enters the second finned tube heat exchanger through the fifth one-way valve, and the other path enters the first finned tube heat exchanger through the sixth one-way valve In the heat exchanger, the refrigerant exchanges heat with the air in the two heat exchangers, and becomes superheated steam after absorbing heat. The refrigerant comes out of the first finned tube heat exchanger and comes out of the second finned tube heat exchanger The refrigerant that passes through the third electromagnetic valve merges and enters the four-way valve, comes out of the second output end of the four-way valve, enters the gas-liquid separator, and is sucked into the compressor again to complete the cycle. At this time, the first electric damper, The second electric dampers are all opened, and the fan works.

当热泵制热运行一段时间后需要除霜时,热泵切换到除霜模式。系统针对第一翅片管换热器和第二翅片管换热器采取交替除霜的方式。在制热模式切换到除霜模式时,首先进行第二翅片管换热器除霜:此时气液分离器中的制冷剂被压缩机吸入压缩、排出后进入四通阀,四通阀此时相比制热模式时,不动作,制冷剂从四通阀第二输入端流出后经过第二电磁阀进入第二翅片管换热器,此时第一电磁阀、第三电磁阀关闭,高温高压的制冷剂在第二翅片管换热器中放出热量,融化换热器表面霜层,制冷剂冷凝成液体后从第二翅片管换热器流出,经过第三单向阀后进入储液器,然后分别经过过滤器、电子膨胀阀被节流成气液两相后经过第六单向阀进入第一翅片管换热器,制冷剂在第一翅片管换热器中吸热蒸发,完全蒸发后流出第一翅片管换热器,进入四通阀,从四通阀第二输出端流出后经过气液分离器再次被压缩机吸入,完成对第二翅片管换热器除霜的循环,此时第一电动风门打开,第二电动风门关闭,风机工作。 When the heat pump needs defrosting after heating for a period of time, the heat pump switches to the defrosting mode. The system adopts alternate defrosting methods for the first finned tube heat exchanger and the second finned tube heat exchanger. When the heating mode is switched to the defrosting mode, the second finned tube heat exchanger is defrosted first: at this time, the refrigerant in the gas-liquid separator is sucked and compressed by the compressor, and then discharged into the four-way valve. At this time, compared with the heating mode, there is no action. The refrigerant flows out from the second input end of the four-way valve and enters the second finned tube heat exchanger through the second solenoid valve. At this time, the first solenoid valve and the third solenoid valve Closed, the high-temperature and high-pressure refrigerant releases heat in the second finned tube heat exchanger and melts the frost layer on the surface of the heat exchanger. After the refrigerant condenses into liquid, it flows out from the second finned tube heat exchanger and passes through the third one-way After the valve, it enters the liquid receiver, and then passes through the filter and the electronic expansion valve to be throttled into gas-liquid two-phase, and then enters the first finned tube heat exchanger through the sixth one-way valve, and the refrigerant is exchanged in the first finned tube The heat absorbed in the heater evaporates, and after complete evaporation, it flows out of the first finned tube heat exchanger, enters the four-way valve, flows out from the second output end of the four-way valve, and is sucked by the compressor again through the gas-liquid separator to complete the second The defrosting cycle of the finned tube heat exchanger, at this time, the first electric damper is opened, the second electric damper is closed, and the fan works.

当第二翅片管换热器完成除霜后,切换四通阀,从气液分离器中被压缩机吸入、压缩和排出的制冷剂经过四通阀后,从四通阀第一输出端流出后进入第一翅片管换热器,此时第三电磁阀关闭,制冷剂在第一翅片管换热器中放出热量,融化霜层,制冷剂冷凝成液体后从第一翅片管换热器流出经过第四单向阀进入储液器,然后依次经过过滤器、电子膨胀阀节流成气液两相后经过第五单向阀进入第二翅片管换热器,制冷剂在其中与空气换热,吸收热量完全蒸发,流出第二翅片管换热器后,经过第二电磁阀进入四通阀(此时第一电磁阀关闭),制冷剂从四通阀第二输出端流出后经过气液分离器,再次被压缩机吸入,完成对第一翅片管换热器除霜的循环,此时第一电动风门关闭,第二电动风门打开,风机工作。当第一翅片管换热器完成除霜后,四通阀动作换向,第一电动风门、第二电动风门都打开,风机一直工作,系统重新运行热泵制热循环。     When the second finned tube heat exchanger finishes defrosting, switch the four-way valve, and the refrigerant sucked, compressed and discharged by the compressor from the gas-liquid separator passes through the four-way valve and flows from the first output end of the four-way valve After flowing out, it enters the first finned tube heat exchanger. At this time, the third electromagnetic valve is closed, and the refrigerant releases heat in the first finned tube heat exchanger to melt the frost layer. After the refrigerant condenses into liquid, it flows from the first finned tube heat exchanger. The outflow of the tube heat exchanger enters the liquid storage through the fourth one-way valve, and then passes through the filter and the electronic expansion valve in turn to form a gas-liquid two-phase flow, and then enters the second finned tube heat exchanger through the fifth one-way valve. The refrigerant exchanges heat with the air in it, absorbs heat and evaporates completely, flows out of the second finned tube heat exchanger, and enters the four-way valve through the second solenoid valve (the first solenoid valve is closed at this time), and the refrigerant flows from the four-way valve to the first four-way valve. After the second output flows out, it passes through the gas-liquid separator and is sucked into the compressor again to complete the cycle of defrosting the first finned tube heat exchanger. At this time, the first electric damper is closed, the second electric damper is opened, and the fan works. When the first finned tube heat exchanger finishes defrosting, the four-way valve moves in reverse, the first electric damper and the second electric damper are both opened, the fan keeps working, and the system restarts the heat pump heating cycle. 

有益效果:本实用新型与现有技术相比,具有以下优点: Beneficial effect: compared with the prior art, the utility model has the following advantages:

除霜时制冷剂不从供热系统中吸取热量用于除霜,使供热系统温度波动很小,提高了空调系统的舒适性;从除霜开始到除霜结束,四通阀虽然动作两次,但换热器中的压力平衡、温度平衡没有被破坏,避免了由此带来的大量能量损失(常规逆向循环除霜存在这损失),同时使系统除霜过程总的时间缩短,提高热泵系统的单位时间供热率。       During defrosting, the refrigerant does not absorb heat from the heating system for defrosting, so that the temperature fluctuation of the heating system is small and the comfort of the air conditioning system is improved; from the beginning of defrosting to the end of defrosting, although the four-way valve operates twice times, but the pressure balance and temperature balance in the heat exchanger are not destroyed, which avoids a large amount of energy loss (there is such a loss in conventional reverse cycle defrosting), and at the same time shortens the total time of the system defrosting process and improves The heating rate per unit time of the heat pump system. ``

附图说明 Description of drawings

图1是本实用新型新型空气源热泵除霜装置示意图。 Fig. 1 is a schematic diagram of a new air source heat pump defrosting device of the present invention.

图中有:压缩机1,四通阀2,四通阀第一输入端2a,四通阀第一输出端2b,四通阀第二输入端2c,四通阀第二输出端2d,第一电磁阀3,第二电磁阀4,换热器5,换热器输入端5a,换热器输出端5b,第一单向阀6,第二单向阀7,第三单向阀8,第四单向阀9,第五单向阀13,第六单向阀14,储液器10,过滤器11,电子膨胀阀12,第一翅片管换热器15,第一翅片管换热器输入端15a,第一翅片管换热器输出端15b,第一电动风门16,第二翅片管换热器17,第二翅片管换热器输入端17a,第二翅片管换热器输出端17b,第二电动风门18,风机19,第三电磁阀20,气液分离器21。 In the figure there are: compressor 1, four-way valve 2, first input end 2a of four-way valve, first output end 2b of four-way valve, second input end 2c of four-way valve, second output end 2d of four-way valve, second A solenoid valve 3, a second solenoid valve 4, a heat exchanger 5, a heat exchanger input port 5a, a heat exchanger output port 5b, a first one-way valve 6, a second one-way valve 7, and a third one-way valve 8 , the fourth one-way valve 9, the fifth one-way valve 13, the sixth one-way valve 14, the reservoir 10, the filter 11, the electronic expansion valve 12, the first finned tube heat exchanger 15, the first fin The input end 15a of the tube heat exchanger, the output end 15b of the first finned tube heat exchanger, the first electric damper 16, the second finned tube heat exchanger 17, the input end 17a of the second finned tube heat exchanger, the second The output end 17b of the finned tube heat exchanger, the second electric damper 18 , the fan 19 , the third electromagnetic valve 20 , and the gas-liquid separator 21 .

具体实施方式 Detailed ways

下面结合附图和实施例来进一步说明本实用新型。 Further illustrate the utility model below in conjunction with accompanying drawing and embodiment.

本实用新型具体的连接方法是压缩机1的输出端接四通阀第一输入端2a,四通阀第二输入端2c通过第一电磁阀3接换热器输入端5a,同时也通过第二电磁阀4接第二翅片管换热器输入端17a,换热器输出端5b接第一单向阀6的入口,第一单向阀6的出口分成三路,一路接储液器10的输入端,一路通过第三单向阀8接第二翅片管换热器输出端17b,另外一路通过第四单向阀9接第一翅片管换热器输出端15b,储液器10的输出端通过过滤器11接电子膨胀阀12的输入端,电子膨胀阀12的输出端分成三路,一路通过第二单向阀7接换热器输出端5b,一路通过第五单向阀13接第二翅片管换热器输出端17b,另外一路通过第六单向阀14接第一翅片管换热器输出端15b,第一翅片管换热器输入端15a接四通阀第一输出端2b,同时第二翅片管换热器输入端17a通过第三电磁阀20也接四通阀第一输出端2b,四通阀第二输出端2d接气液分离器21的输入端,气液分离器21的输出端接压缩机1的输入端,在第一翅片管换热器15的空气入口装有第一电动风门16,在第二翅片管换热器17的空气入口装有第二电动风门18,在第一翅片管换热器15与第二翅片管换热器17的空气出口装有风机19。 The specific connection method of the utility model is that the output end of the compressor 1 is connected to the first input end 2a of the four-way valve, and the second input end 2c of the four-way valve is connected to the input end 5a of the heat exchanger through the first electromagnetic valve 3, and also through the first electromagnetic valve 3. The second solenoid valve 4 is connected to the input end 17a of the second finned tube heat exchanger, and the output end 5b of the heat exchanger is connected to the inlet of the first one-way valve 6. The outlet of the first one-way valve 6 is divided into three paths, and one path is connected to the liquid reservoir. The input end of 10, one way is connected to the output end 17b of the second finned tube heat exchanger through the third one-way valve 8, and the other way is connected to the output end 15b of the first finned tube heat exchanger through the fourth one-way valve 9, and the liquid storage The output end of the device 10 is connected to the input end of the electronic expansion valve 12 through the filter 11, and the output end of the electronic expansion valve 12 is divided into three paths, one path is connected to the output end 5b of the heat exchanger through the second one-way valve 7, and the other path is connected to the output end 5b of the heat exchanger through the fifth one-way valve. The direction valve 13 is connected to the output end 17b of the second finned tube heat exchanger, and the other way is connected to the output end 15b of the first finned tube heat exchanger through the sixth one-way valve 14, and the input end 15a of the first finned tube heat exchanger is connected to The first output end 2b of the four-way valve, and the input end 17a of the second finned tube heat exchanger is also connected to the first output end 2b of the four-way valve through the third solenoid valve 20, and the second output end 2d of the four-way valve is connected to the gas-liquid separation The input end of the device 21, the output end of the gas-liquid separator 21 is connected to the input end of the compressor 1, and the first electric damper 16 is installed at the air inlet of the first finned tube heat exchanger 15, and the first electric damper 16 is installed at the air inlet of the second finned tube heat exchanger. The air inlet of the heat exchanger 17 is equipped with a second electric damper 18, and a fan 19 is installed at the air outlets of the first finned tube heat exchanger 15 and the second finned tube heat exchanger 17.

空气源热泵夏季制冷模式运行时:低温低压的制冷剂气体从气液分离器21中被压缩机1吸入、压缩后变成高温高压过热蒸气排出,经过四通阀2后从四通阀第一输出端2b出来后分成两路,分别进入第一翅片管换热器15和通过第三电磁阀20进入第二翅片管换热器17,此时第二电磁阀4关闭,在第一翅片管换热器15和第二翅片管换热器17中,制冷剂与空气换热,放出热量冷凝成液体,然后分别从第一翅片管换热器15、第二翅片管换热器17出来后又分别经过第四单向阀9、第三单向阀8后汇合进入储液器10,然后依次经过过滤器11、电子膨胀阀12后变成低温低压的气液两相,再经过第二单向阀7后进入换热器5,制冷剂在换热器5中吸热蒸发,放出冷量,制冷剂完全蒸发后变成过热气体从换热器5出来后经过第一电磁阀3、四通阀2进入气液分离器21,然后再次被吸入压缩机1,从而完成制冷循环,此时第一电动风门16、第二电动风门18都打开,风机19工作。 When the air source heat pump is running in summer cooling mode: the low-temperature and low-pressure refrigerant gas is sucked by the compressor 1 from the gas-liquid separator 21, compressed and becomes a high-temperature and high-pressure superheated vapor, and then discharged from the four-way valve 1 after passing through the four-way valve 2. After the output end 2b comes out, it is divided into two paths, respectively entering the first finned tube heat exchanger 15 and entering the second finned tube heat exchanger 17 through the third electromagnetic valve 20. At this time, the second electromagnetic valve 4 is closed, and the first In the finned tube heat exchanger 15 and the second finned tube heat exchanger 17, the refrigerant exchanges heat with the air, releases heat and condenses into a liquid, and then flows from the first finned tube heat exchanger 15 and the second finned tube heat exchanger 15 and the second finned tube heat exchanger respectively. After the heat exchanger 17 comes out, it passes through the fourth one-way valve 9 and the third one-way valve 8 respectively, and then merges into the liquid reservoir 10, and then passes through the filter 11 and the electronic expansion valve 12 in turn to become a low-temperature and low-pressure gas-liquid two-way system. Phase, and then enter the heat exchanger 5 after passing through the second one-way valve 7, the refrigerant absorbs heat and evaporates in the heat exchanger 5, and releases cooling capacity. The first electromagnetic valve 3 and the four-way valve 2 enter the gas-liquid separator 21, and then are sucked into the compressor 1 again to complete the refrigeration cycle. At this time, the first electric damper 16 and the second electric damper 18 are opened, and the fan 19 works.

空气源热泵冬季制热模式运行时:气液分离器21中低温低压的制冷剂气体被压缩机1吸入、压缩后排出进入四通阀2,从四通阀第二输入端2c出来后经过第一电磁阀3进入换热器5,此时第二电磁阀4关闭,制冷剂在换热器5中放出热量,冷凝成液体后流出,经过第一单向阀6进入储液器10,制冷剂从储液器10出来后经过过滤器11、电子膨胀阀12被节流成气液两相后,分成两路,一路经过第五单向阀13进入第二翅片管换热器17,另外一路经过第六单向阀14进入第一翅片管换热器15,制冷剂分别在两个换热器中与空气换热,吸收热量后变成过热蒸气,从第一翅片管换热器15流出的过热蒸气与从第二翅片管换热器17流出并经过第三电磁阀20的过热蒸气汇合后进入四通阀2,从四通阀第二输出端2d出来后进入气液分离器21,然后再次被吸入压缩机1,从而完成循环,此时第一电动风门16、第二电动风门18都打开,风机19工作。 When the air source heat pump is running in winter heating mode: the low-temperature and low-pressure refrigerant gas in the gas-liquid separator 21 is sucked by the compressor 1, compressed, and then discharged into the four-way valve 2. After coming out of the second input port 2c of the four-way valve, it passes through the second A solenoid valve 3 enters the heat exchanger 5, at this time the second solenoid valve 4 is closed, the refrigerant releases heat in the heat exchanger 5, condenses into a liquid and then flows out, and enters the liquid receiver 10 through the first one-way valve 6 for refrigeration. After the agent comes out of the liquid reservoir 10, it passes through the filter 11 and the electronic expansion valve 12 and is throttled into gas-liquid two-phase. The other way passes through the sixth one-way valve 14 and enters the first finned tube heat exchanger 15. The refrigerant exchanges heat with the air in the two heat exchangers respectively, and becomes superheated steam after absorbing heat, and is exchanged from the first finned tube The superheated steam flowing out of the heater 15 merges with the superheated steam flowing out of the second finned tube heat exchanger 17 and passing through the third electromagnetic valve 20, then enters the four-way valve 2, and enters the gas flow after coming out from the second output port 2d of the four-way valve. The liquid separator 21 is then sucked into the compressor 1 again to complete the cycle. At this time, the first electric damper 16 and the second electric damper 18 are all opened, and the blower fan 19 works.

当热泵制热运行一段时间后需要除霜时,热泵切换到除霜模式。系统针对第一翅片管换热器15和第二翅片管换热器17采取交替除霜的方式。在制热模式切换到除霜模式时,首先进行第二翅片管换热器17除霜:此时气液分离器21中的制冷剂被压缩机1吸入压缩、排出后进入四通阀2,四通阀2此时相比制热模式时,不动作,第二电磁阀4开启,制冷剂从四通阀第二输入端2c流出后经过第二电磁阀4进入第二翅片管换热器17,此时第一电磁阀3、第三电磁阀20关闭,高温高压的制冷剂在第二翅片管换热器17中放出热量,融化翅片管换热器表面霜层,制冷剂冷凝成液体后从第二翅片管换热器17流出,经过第三单向阀8后进入储液器10,然后分别经过过滤器11、电子膨胀阀12被节流成气液两相后经过第六单向阀14进入第一翅片管换热器15,制冷剂在第一翅片管换热器15中吸热蒸发,完全蒸发后流出第一翅片管换热器15,进入四通阀2,从四通阀第二输出端2d流出后经过气液分离器21再次被压缩机1吸入,完成对第二翅片管换热器17除霜的循环,此时第一电动风门16打开,第二电动风门18关闭,风机19工作。 When the heat pump needs defrosting after heating for a period of time, the heat pump switches to the defrosting mode. The system adopts an alternate defrosting method for the first finned tube heat exchanger 15 and the second finned tube heat exchanger 17 . When the heating mode is switched to the defrosting mode, the second finned tube heat exchanger 17 is defrosted first: at this time, the refrigerant in the gas-liquid separator 21 is sucked and compressed by the compressor 1, and then discharged into the four-way valve 2 At this time, the four-way valve 2 does not act compared to the heating mode, and the second solenoid valve 4 is opened. The refrigerant flows out from the second input port 2c of the four-way valve and enters the second finned tube through the second solenoid valve 4. Heater 17, at this time the first solenoid valve 3 and the third solenoid valve 20 are closed, and the high-temperature and high-pressure refrigerant releases heat in the second finned tube heat exchanger 17, melting the frost layer on the surface of the finned tube heat exchanger, and cooling After the solvent is condensed into liquid, it flows out from the second finned tube heat exchanger 17, passes through the third one-way valve 8, enters the liquid reservoir 10, and then passes through the filter 11 and the electronic expansion valve 12 to be throttled into gas-liquid two-phase Then enter the first finned tube heat exchanger 15 through the sixth one-way valve 14, the refrigerant absorbs heat and evaporates in the first finned tube heat exchanger 15, and flows out of the first finned tube heat exchanger 15 after completely evaporating. Enter the four-way valve 2, flow out from the second output end 2d of the four-way valve, and then pass through the gas-liquid separator 21 and be sucked by the compressor 1 again to complete the cycle of defrosting the second finned tube heat exchanger 17. At this time, the first The electric damper 16 is opened, the second electric damper 18 is closed, and the blower fan 19 works.

当第二翅片管换热器17完成除霜后,切换四通阀2,气液分离器21中的制冷剂被压缩机1吸入、压缩并排出,经过四通阀2后,从四通阀第一输出端2b流出后进入第一翅片管换热器15,此时第三电磁阀20关闭,制冷剂在第一翅片管换热器15中放出热量,融化霜层,制冷剂冷凝成液体后从第一翅片管换热器15流出经过第四单向阀9进入储液器10,然后依次经过过滤器11、电子膨胀阀12节流成气液两相后经过第五单向阀13进入第二翅片管换热器17,制冷剂在其中与空气换热,吸收热量完全蒸发,流出第二翅片管换热器17后,经过第二电磁阀4进入四通阀2(此时第一电磁阀3关闭),制冷剂从四通阀第二输出端2d流出后经过气液分离器21,再次被压缩机1吸入,完成对第一翅片管换热器15除霜的循环,此时第一电动风门16关闭,第二电动风门18打开。当第一翅片管换热器15完成除霜后,四通阀2动作换向,第一电动风门16、第二电动风门18都打开,风机19一直工作,系统重新运行热泵制热循环。 When the second finned tube heat exchanger 17 completes the defrosting, switch the four-way valve 2, the refrigerant in the gas-liquid separator 21 is sucked, compressed and discharged by the compressor 1, and after passing through the four-way valve 2, the refrigerant from the four-way After the first output port 2b of the valve flows out, it enters the first finned tube heat exchanger 15. At this time, the third electromagnetic valve 20 is closed, and the refrigerant releases heat in the first finned tube heat exchanger 15, melting the frost layer, and the refrigerant After being condensed into a liquid, it flows out from the first finned tube heat exchanger 15, passes through the fourth one-way valve 9, enters the liquid reservoir 10, and then passes through the filter 11 and the electronic expansion valve 12 in sequence to form gas-liquid two-phase, and then passes through the fifth The one-way valve 13 enters the second finned tube heat exchanger 17, where the refrigerant exchanges heat with the air, absorbs heat and evaporates completely, flows out of the second finned tube heat exchanger 17, and enters the four-way through the second solenoid valve 4. Valve 2 (the first solenoid valve 3 is closed at this time), the refrigerant flows out from the second output end 2d of the four-way valve, passes through the gas-liquid separator 21, and is sucked by the compressor 1 again, completing the cooling of the first finned tube heat exchanger 15 cycles of defrosting, at this time the first electric damper 16 is closed, and the second electric damper 18 is opened. After the defrosting of the first finned tube heat exchanger 15 is completed, the four-way valve 2 moves in reverse, the first electric damper 16 and the second electric damper 18 are opened, the fan 19 keeps working, and the system restarts the heat pump heating cycle.

在除霜模式下,在分别进行第一翅片管换热器和第二翅片管换热器时,相对应的第一电动风门、第二电动风门关闭,可减小相应翅片管换热器除霜时与空气的换热热量损失,同时可增大不除霜的翅片管换热器的风量,提高系统的除霜效果。在交替除霜过程中可通过调节压缩机的运行频率或者对压缩机进行能量调节,保证除霜时系统的最佳运行。 In the defrosting mode, when the first finned tube heat exchanger and the second finned tube heat exchanger are operated respectively, the corresponding first electric damper and the second electric damper are closed, which can reduce the corresponding finned tube heat exchanger. When the heat exchanger defrosts, the heat exchanged with the air loses heat. At the same time, it can increase the air volume of the non-defrosted finned tube heat exchanger and improve the defrosting effect of the system. In the process of alternate defrosting, the operating frequency of the compressor can be adjusted or the energy of the compressor can be adjusted to ensure the best operation of the system during defrosting.

Claims (4)

1. air source heat pump defrosting device, it is characterized in that this device comprises compressor (1), cross valve (2), gas-liquid separator (21), heat exchanger (5), reservoir (10), filter (11), the first finned tube exchanger (15), the second finned tube exchanger (17), be arranged on first MOD (16) of described the first finned tube exchanger (15) air intlet, be arranged on second MOD (18) of described the second finned tube exchanger (17) air intlet, be arranged on the blower fan (19) at two finned tube exchanger air outlet slit places, and be arranged on the first magnetic valve (3) on pipeline, the second magnetic valve (4), the first check valve (6), the second check valve (7), the 3rd check valve (8), the 4th check valve (9), the 5th check valve (13), the 6th check valve (14), electric expansion valve (12) and the 3rd magnetic valve (20),
be provided with cross valve first input end (2a) on described cross valve (2), cross valve the first output (2b), cross valve the second input (2c) and cross valve the second output (2d), be provided with heat exchanger input (5a) and heat exchanger output (5b) on described heat exchanger (5), be provided with the first finned tube exchanger input (15a) and the first finned tube exchanger output (15b) on described the first finned tube exchanger (15), be provided with the second finned tube exchanger input (17a) and the second finned tube exchanger output (17b) on described the second finned tube exchanger (17), the output termination cross valve first input end (2a) of described compressor (1), cross valve the second input (2c) is connected with heat exchanger input (5a) by the first magnetic valve (3), also by the second magnetic valve (4), with the second finned tube exchanger input (17a), be connected simultaneously, cross valve the first output (2b) is divided into two-way, one tunnel is connected with the first finned tube exchanger input (15a), another road is connected with the second finned tube exchanger input (17a) by the 3rd magnetic valve (20), cross valve the second output (2d) is connected with the input of gas-liquid separator (21), the output of gas-liquid separator (21) is connected with the input of compressor (1),
heat exchanger output (5b) simultaneously with the entrance of the first check valve (6) be connected the outlet of check valve (7) and be connected, the outlet of the first check valve (6) is divided into three tunnels, one tunnel connects the input of reservoir (10), the 3rd check valve (8) of leading up to is connected with the second finned tube exchanger output (17b), the 4th check valve (9) of leading up in addition is connected with the first finned tube exchanger output (15b), the output of reservoir (10) is connected with the input of electric expansion valve (12) by filter (11), the output of electric expansion valve (12) is divided into three tunnels, one tunnel is connected with the input of the second check valve (7), the 5th check valve (13) of leading up to is connected with the second finned tube exchanger output (17b), the 6th check valve (14) of leading up in addition is connected with the first finned tube exchanger output (15b).
2. air source heat pump defrosting device according to claim 1, is characterized in that, described compressor (1) maybe can be realized the compressor of energy adjustment for frequency-changeable compressor.
3. air source heat pump defrosting device according to claim 1, is characterized in that, when described the first finned tube exchanger (15) defrosted, the first MOD (16) was closed, and the second MOD (18) is opened; When described the second finned tube exchanger (17) defrosted, the first MOD (16) was opened, and the second MOD (18) is closed.
4. air source heat pump defrosting device according to claim 1, is characterized in that, during described the first finned tube exchanger (15) defrosting, the second finned tube exchanger (17) absorbs heat from air as evaporimeter; During described the second finned tube exchanger (17) defrosting, the second finned tube exchanger (15) absorbs heat from air as evaporimeter.
CN2013202639932U 2013-05-15 2013-05-15 Defrosting device of air source heat pump Expired - Lifetime CN203286825U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103196262A (en) * 2013-04-19 2013-07-10 洛阳中懋环保设备有限公司 Hot gas bypass defrosting device for air source heat pump water heater
CN103245150A (en) * 2013-05-15 2013-08-14 东南大学 Air source heat pump defrosting device
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
CN107655237A (en) * 2017-11-03 2018-02-02 上海柯茂机械有限公司 Air source heat pump system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103196262A (en) * 2013-04-19 2013-07-10 洛阳中懋环保设备有限公司 Hot gas bypass defrosting device for air source heat pump water heater
CN103245150A (en) * 2013-05-15 2013-08-14 东南大学 Air source heat pump defrosting device
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
CN107655237A (en) * 2017-11-03 2018-02-02 上海柯茂机械有限公司 Air source heat pump system

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