WO2017193613A1 - 一种适用于严寒地区的热泵型排风热回收新风空调机组 - Google Patents

一种适用于严寒地区的热泵型排风热回收新风空调机组 Download PDF

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Publication number
WO2017193613A1
WO2017193613A1 PCT/CN2017/070385 CN2017070385W WO2017193613A1 WO 2017193613 A1 WO2017193613 A1 WO 2017193613A1 CN 2017070385 W CN2017070385 W CN 2017070385W WO 2017193613 A1 WO2017193613 A1 WO 2017193613A1
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Prior art keywords
air
heat exchanger
exhaust
way reversing
conditioning unit
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PCT/CN2017/070385
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English (en)
French (fr)
Inventor
俞越
张春路
曹祥
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南通华信中央空调有限公司
同济大学
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Publication of WO2017193613A1 publication Critical patent/WO2017193613A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • 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

Definitions

  • the invention relates to an air conditioning unit suitable for use in a severe cold area of -30 °C, in particular to a heat pump type exhaust air heat recovery fresh air conditioning unit suitable for use in severe cold regions.
  • the fresh air conditioning unit is an effective air purifying device.
  • the indoor dirty air is discharged outside, and on the other hand, the outdoor fresh air is filtered and heat-treated, and then input into the room.
  • the exhaust heat recovery technology is not used, the fresh air heat treatment will consume a lot of energy.
  • the heat pump type exhaust heat recovery fresh air air conditioning unit has been developed as a new type of active exhaust air heat recovery technology, which uses limited electric energy to recycle the cooling capacity and heat of the exhaust air through the refrigerant heat pump.
  • the air supply heat exchanger acts as an evaporator
  • the exhaust air heat exchanger acts as a condenser
  • the fresh air load and the compressor consume power are taken away by the exhaust air.
  • the air supply heat exchanger acts as a condenser
  • the exhaust air heat exchanger acts as an evaporator, and the sensible heat and latent heat in the exhaust air are recovered for heating the fresh air. It has many advantages such as high heat recovery efficiency, large temperature range, convenient use, and the like, and is very popular.
  • the object of the present invention is to provide an improvement of the conventional heat pump type exhaust heat recovery fresh air air conditioning unit, and use the outlet air of the exhaust heat exchanger (>0 ° C) to preheat the outdoor low temperature air to improve the feed air heat exchanger.
  • Wind temperature to above -10 °C reduce the heat pump system load, avoid frost formation in the exhaust heat exchanger, can greatly expand the applicable range of heat pump exhaust air recovery fresh air conditioning unit to -30 °C outdoor ambient temperature to solve the above background Problems raised in the technology.
  • a heat pump type exhaust heat recovery fresh air air conditioning unit suitable for use in severe cold regions, including a supply air heat exchanger, an exhaust heat exchanger, a compressor, a four-way reversing valve Throttle device, refrigerant connecting pipe, fresh air port, first three-way reversing valve, second three-way reversing valve, air supply fan, air supply port, return air outlet, exhaust fan, defrosting electric heater, air - an air plate heat exchanger, an exhaust vent, and a duct, the fresh air vent is electrically connected to the first three-way reversing valve through the air passage, and the first three-way reversing valve is simultaneously reversible through the air passage and the second three-way The valve is connected to the air-air plate heat exchanger through the air outlet; the second three-way switching valve is simultaneously connected to the air-air plate heat exchanger through the air outlet, and is connected to the air blower through the air duct.
  • the air supply fan is connected to the air supply heat exchanger through the air duct, and the air supply heat exchanger is connected to the air supply port through the air duct; the air supply heat exchanger is respectively connected to the four-way reversing valve and the throttle device through the refrigerant connecting tube Connected, the four-way reversing valve is set
  • the compressor, the four-way reversing valve and the throttling device are connected in parallel with the exhaust air heat exchanger through the refrigerant connecting pipe, the input end of the exhaust heat exchanger is connected to the air return port through the air duct, and the output end is connected to the air outlet through the air duct.
  • the fan and the exhaust fan are connected to the defrosting electric heater through the air passage and connected to the air-air plate heat exchanger.
  • the air-to-air plate heat exchanger comprises a first air passage and a second air passage
  • the first air passage is perpendicular to the ground, communicates with the defrosting electric heater and the exhaust vent through the air passage
  • the second air passage passes through the wind
  • the road is connected to the three-way reversing valve.
  • the first air passage side wall is coated with a superhydrophobic material.
  • the first air passage side wall is provided with a heating wire.
  • the throttling device is a capillary tube, a short tube, a thermal expansion valve or an electronic expansion valve, and is connected to the air supply heat exchanger, the exhaust air heat exchanger and the reheating device through the refrigerant connecting pipe.
  • the method further comprises a reheat coil, a reheat solenoid valve and a reheat flow regulating valve, wherein the reheat coil is disposed on the air passage between the air supply heat exchanger and the air supply port, and the reheat coil is respectively reheated and electromagnetically
  • the output end of the valve is connected to the input end of the reheat flow regulating valve, and the input end of the reheating electromagnetic valve is in communication with the compressor and the four-way reversing valve, and the output end of the thermal flow regulating valve is connected to the exhaust heat exchanger and On the air passage between the throttling devices.
  • the present invention can be used in an extremely low temperature condition of an outdoor temperature of -30 ° C without lowering the supply air temperature and the evaporator is not frosted.
  • the heating performance under the severe cold condition of the invention is remarkable, and the applicable area of the heat pump type exhaust heat recovery fresh air air conditioning unit is greatly expanded.
  • the air conditioning unit of the present invention can obtain high cooling and heating efficiency by recovering venting sensible heat and latent heat, and the energy saving effect is remarkable.
  • the simulation results show that the refrigeration COP of the present invention can reach 3.0 or more in summer and the heating COP in winter can reach 4.0 or more.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
  • Embodiment 2 is a schematic structural view of Embodiment 2 of the present invention.
  • a heat pump type exhaust heat recovery fresh air air conditioning unit suitable for use in a severe cold region, including a supply air heat exchanger 1, an exhaust heat exchanger 2, a compressor 3, and a fourth.
  • the air passage 20 is electrically connected to the first three-way switching valve 11, and the first three-way switching valve 11 is simultaneously connected to the second three-way switching valve 12 through the air passage 20, through the air outlet 19 and the air-air plate type.
  • the heat exchangers 18 are connected, the second three-way is reversed, and 12 is connected to the air-air plate heat exchanger 18 through the air outlet 19, and is connected to the air supply fan 13 through the air duct 20, and the air supply fan 13 passes through the air duct 20.
  • the air supply heat exchanger 1 is connected to the air supply heat exchanger 1 and the air supply heat exchanger 1 is connected to the air supply port 14.
  • the air supply heat exchanger 1 is connected to the four-way switching valve 4 and the throttle device 5 through the refrigerant connecting pipe 9, and the compressor 3, the four-way switching valve 4 and the throttle device 5 are disposed on the four-way switching valve 4.
  • the input end of the exhaust heat exchanger 2 is connected to the air return port 15 through the air duct 20, and the output end is connected to the exhaust fan 16 through the air duct 20, and the exhaust fan A defrosting electric heater 17 is connected in series through the air passage 20, and is connected to the air-air plate heat exchanger 18.
  • the air-to-air plate heat exchanger 18 includes a first air passage perpendicular to the ground, a passage through the air passage to the defrosting electric heater and the exhaust vent, and a second air passage through the air passage
  • the three-way reversing valve is connected.
  • the first air passage side wall is coated with a superhydrophobic material.
  • the first air passage side wall is provided with a heating wire.
  • the throttle device 5 is a capillary tube, a short tube, a thermal expansion valve or an electronic expansion valve, and communicates with the air supply heat exchanger 1, the exhaust air heat exchanger 2, and the reheating device through the refrigerant connection pipe 9.
  • the traditional heat pump type exhaust heat recovery fresh air air conditioning unit is improved, and the outdoor air (>0 ° C) is used to preheat the outdoor low temperature air to increase the inlet air temperature of the air supply heat exchanger 1 to -10 ° C.
  • the load of the heat pump system is reduced, and frosting of the exhaust heat exchanger 2 is avoided, and the applicable range of the heat pump type exhaust air recovery fresh air conditioning unit can be greatly expanded to an outdoor temperature of -30 °C.
  • a heat pump type exhaust heat recovery fresh air conditioning unit suitable for use in severe cold regions has two working conditions of cooling and heating, and the specific working process is as follows.
  • the air supply heat exchanger 1 serves as an evaporator
  • the exhaust air heat exchanger 2 serves as a condenser
  • the four-way switching valve 4 connects the refrigerant connecting pipe 9, the first three-way switching valve 11 and the second
  • the three-way switching valve 12 connects the air passage 20, and the defrosting electric heater 17 does not start.
  • Refrigerant cycle compressor Refrigerant connecting pipe Four-way reversing valve
  • Refrigerant connecting pipe 9 - exhaust air heat exchanger 2 refrigerant connecting pipe 9 - throttling device 5 - refrigerant connecting pipe 9 - air supply heat exchanger 1 - refrigerant connecting pipe 9 - Four-way reversing valve 4 - refrigerant connecting pipe 9 - compressor 3.
  • Fresh air is drawn in from the fresh air vent 10, passed through the air passage 20, the first three-way directional control valve 11, and then bypassed from the air passage 20 without passing through the air-air plate heat exchanger 18.
  • the fresh air passes through the second three-way switching valve 12 and the blower fan 13 enters the air supply heat exchanger 1 to be cooled and dehumidified, and finally sent to the room or other air processing equipment through the air supply port 14.
  • the exhaust air heat exchanger 5 enters the exhaust air heat exchanger 5 to absorb the condensation heat of the refrigerant, and then passes through the exhaust fan 16, the defrosting electric heater 17, and the air-air plate heat exchanger 18
  • the first air passage is exhausted to the exhaust vent 19.
  • the air supply heat exchanger 1 serves as a condenser
  • the exhaust air heat exchanger 5 serves as an evaporator
  • the four-way switching valve 4 connects the refrigerant connecting pipe 9, the first three-way switching valve 11 and two.
  • the three-way switching valve 12 connects the air duct 20, and the defrosting electric heater 17 is in the air.
  • the first air passage of the air plate heat exchanger 18 is activated for a short time when it is frosted, and is closed after the defrosting is completed.
  • Refrigerant cycle compressor 3 - refrigerant connecting pipe 9 - four-way reversing valve 4 - refrigerant connecting pipe 9 - air supply heat exchanger 1 - refrigerant connecting pipe 9 - throttling device 5 - Refrigerant connection pipe 9 - Exhaust heat exchanger 2 - Refrigerant connection pipe 9 - Four-way reversing valve 4 - Refrigerant connection pipe 9 - Compressor 3. After the fresh air is sucked from the fresh air outlet 10, the air passage 20, the first three-way switching valve 11, and the air passage 20 enter the air-air plate heat exchanger 18, and are exhausted by the exhaust air.
  • the fresh air is heated by the second three-way switching valve 12 and the blower fan 13 into the air supply heat exchanger 1, and finally sent to the room or other air processing equipment through the air supply port 14.
  • the air duct 20 enters the exhaust air heat exchanger 5 to release heat to the refrigerant, and then enters the air-air plate heat exchanger through the exhaust fan 16 and the defrosting electric heater 17.
  • the first air passage of 18 is further cooled and finally discharged through the duct 20 to the exhaust vent 19.
  • the utility model relates to a heat pump type exhaust air heat recovery fresh air air conditioning unit with reheat function, and the structure and process are shown in FIG. 2 .
  • the reheat coil 6, the reheating solenoid valve 7, the reheating flow regulating valve 8, and the necessary refrigerant connecting pipe are added, and the dehumidifying and reheating operation is functionally added.
  • the dehumidification condition is based on the refrigeration condition, and the reheat solenoid valve 7 is opened, and the heat flow regulating valve 8 is re-heated. After the fresh air is cooled and dehumidified in the air supply heat exchanger 1, the dry bulb temperature is increased by the reheat coil 6 to ensure the air supply comfort. Dehumidification conditions apply to spring and autumn, weather conditions with moderate temperature but high humidity.
  • the second embodiment adds the second fresh air outlet 21 and the second air outlet 22, and functionally, in addition to the fresh air, the fresh air does not pass through the air-air plate heat exchanger 18 under the cooling condition.
  • the exhaust does not have to pass through the air-to-air plate heat exchanger 18, thereby reducing the power consumption of the exhaust fan 16.
  • all components of the refrigerant cycle and the air duct are not completely displayed.
  • different refrigerants are selected, and a high-pressure liquid storage device, a gas-liquid separator, an oil separation, a filter, a dryer, etc. are disposed in the refrigerant circuit.
  • Refrigeration accessories water treatment accessories such as water filters, sterilizing devices, air treatment accessories such as filters, mufflers, auxiliary humidifiers, auxiliary heaters, sterilizers, etc., with different air supply nozzles and return air
  • the grille changing the position of the fan, replacing the air duct three-way reversing valve with a damper or increasing the heat exchanger, the fan and the damper without departing from the spirit of the technical solution of the present invention cannot be regarded as substantially improving the present invention. It belongs to the protection scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

提供一种适用于严寒地区的热泵型排风热回收新风空调机组。该空调机组包括送风换热器（1）、排风换热器（2）、压缩机（3）、四通换向阀（4）、节流装置（5）、制冷剂连接管（9）、新风口（10）、第一三通换向阀（11）、第二三通换向阀（12）、送风风机（13）、送风口（14）、回风口（15）、排风风机（16）、化霜电加热器（17）、空气-空气板式换热器（18）、排风口（19）、风道（20）。该空调机组利用排风换热器（2）出口空气（>0℃）深度预热室外低温空气，提高送风换热器（1）的进风温度至-10℃以上，降低热泵系统负荷，避免排风换热器（2）发生结霜，可大幅扩展热泵式排风热回收新风空调机组的适用范围至-30℃室外环境温度。

Description

一种适用于严寒地区的热泵型排风热回收新风空调机组 技术领域
本发明涉及适用于-30℃严寒地区的空调机组，具体为一种适用于严寒地区的热泵型排风热回收新风空调机组。
背景技术
随着人们对室内空气品质的要求不断提高，新风空调机组的使用越来越广泛。新风空调机组是一种有效的空气净化设备，一方面把室内污浊的空气排出室外，另一方面把室外新鲜的空气经过过滤和热湿处理后，再输入到室内。但如果不采用排风热回收技术，新风的热湿处理将消耗大量的能源。
近年来兴起的热泵式排风热回收新风空调机组，是一种新型的有源排风热回收技术，它使用有限的电能，通过制冷剂热泵循环回收排风的冷量和热量。夏季，送风换热器作为蒸发器，排风换热器作为冷凝器，经排风带走新风负荷和压缩机耗功。制热工况下，送风换热器作为冷凝器，排风换热器作为蒸发器，排风中的显热和潜热均被回收用于加热新风。其具有热回收效率高，适应温差范围大，使用方便等诸多优点，广受欢迎。
但是传统的热泵式热回收装置在冬季严寒地区使用时，排风换热器(蒸发器)易发生结霜，影响机组的制热能力和正常运行。数值仿真显示，若设定送风温度为20℃，当室外环境低于-10℃，排风换热器结霜将无可避免。
发明内容
本发明的目的在于提供一种对传统热泵式排风热回收新风空调机组加以改进，利用排风换热器出口空气(>0℃)深度预热室外低温空气，提高送风换热器的进风温度至-10℃以上，降低热泵系统负荷，避免排风换热器发生结霜，可大幅扩展热泵式排风热回收新风空调机组的适用范围至-30℃室外环境温度，以解决上述背景技术中提出的问题。
为实现上述目的，本发明提供如下技术方案：一种适用于严寒地区的热泵型排风热回收新风空调机组,包括送风换热器、排风换热器、压缩机、四通换向阀、节流装置、制冷剂连接管、新风口、第一三通换向阀、第二三通换向阀、送风风机、送风口、回风口、排风风机、化霜电加热器、空气-空气板式换热器、排风口、风道，所述新风口通过风道与第一三通换向阀导通，第一三通换向阀同时通过风道与第二三通换向阀相连，通过排风口与空气-空气板式换热器相连；所述第二三通换向阀同时通过排风口与空气-空气板式换热器相连，通过风道与送风风机相连，送风风机通过风道与送风换热器导通，送风换热器通过风道连接送风口；所述送风换热器通过制冷剂连接管分别与四通换向阀及节流装置连通，所述四通换向阀上设置 压缩机，四通换向阀与节流装置以并行方式通过制冷剂连接管与排风换热器相连，排风换热器输入端通过风道连接回风口，输出端通过风道连接排风风机，排风风机上通过风道串行连接有化霜电加热器，并与空气-空气板式换热器相连。
优选的，空气-空气板式换热器包括第一空气通道和第二空气通道，第一空气通道垂直于地面，通过风道与化霜电加热器和排风口连通，第二空气通道通过风道与三通换向阀连通。
优选的，第一空气通道侧壁涂抹超疏水材料。
优选的，第一空气通道侧壁布置电热丝。
优选的，节流装置为毛细管、短管、热力膨胀阀或电子膨胀阀，通过制冷剂连接管与送风换热器，排风换热器和再热装置连通。
优选的，还包括再热盘管、再热电磁阀及再热流量调节阀，再热盘管设置在送风换热器与送风口之间的风道上，再热盘管分别与再热电磁阀的输出端及再热流量调节阀的输入端相连，再热电磁阀的输入端与压缩机及四通换向阀向连通，再热流量调节阀的输出端连接在排风换热器与节流装置之间的风道上。
与现有技术相比，本发明的有益效果是：
(1)本发明可在室外温度-30℃的极端低温条件下，不降低送风温度且蒸发器不结霜。本发明严寒条件下制热性能显著，大幅扩展了热泵式排风热回收新风空调机组的适用地区。
(2)本发明的空调机组通过回收排风显热和潜热，可获得较高的制冷制热效率，节能效果显著。仿真计算结果显示，本发明在夏季制冷COP可达3.0以上，冬季制热COP可达4.0以上。
附图说明
图1为本发明实施例1结构示意图；
图2为本发明实施例2结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1，本发明提供一种技术方案：一种适用于严寒地区的热泵型排风热回收新风空调机组,包括送风换热器1、排风换热器2、压缩机3、四通换向阀4、节流装置5、制冷剂连接管9、新风口10、第一三通换向阀11、第二三通换向阀12、送风风机13、送风口14、回风口15、排风风机16、化霜电加热器17、空气-空气板式换热器18、排风口19、风道20，新风口10 通过风道20与第一三通换向阀11导通，第一三通换向阀11同时通过风道20与第二三通换向阀12相连，通过排风口19与空气-空气板式换热器18相连，第二三通换向,12同时通过排风口19与空气-空气板式换热器18相连，通过风道20与送风风机13相连，送风风机13通过风道20与送风换热器1导通，送风换热器1通过风道20连接送风口14.
送风换热器1通过制冷剂连接管9分别与四通换向阀4及节流装置5连通，四通换向阀4上设置压缩机3，四通换向阀4与节流装置5以并行方式通过制冷剂连接管9与排风换热器2相连，排风换热器2输入端通过风道20连接回风口15，输出端通过风道20连接排风风机16，排风风机16上通过风道20串行连接有化霜电加热器17，并与空气-空气板式换热器18相连。
空气-空气板式换热器18包括第一空气通道和第二空气通道，第一空气通道垂直于地面，通过风道与化霜电加热器和排风口连通，第二空气通道通过风道与三通换向阀连通。第一空气通道侧壁涂抹超疏水材料。第一空气通道侧壁布置电热丝。节流装置5为毛细管、短管、热力膨胀阀或电子膨胀阀，通过制冷剂连接管9与送风换热器1，排风换热器2和再热装置连通。对传统热泵式排风热回收新风空调机组加以改进，利用排风换热器2出口空气(>0℃)深度预热室外低温空气，提高送风换热器1的进风温度至-10℃以上，降低热泵系统负荷，避免排风换热器2发生结霜，可大幅扩展热泵式排风热回收新风空调机组的适用范围至-30℃室外环境温度。
实施例1
一种适用于严寒地区的热泵型排风热回收新风空调机组存在制冷，制热两种工况，其具体工作流程如下。
制冷工况下，送风换热器1作为蒸发器，排风换热器2作为冷凝器，四通换向阀4使制冷剂连接管9连通，第一三通换向阀11及第二三通换向阀12使风道20连通，化霜电加热器17不启动。制冷剂循环：压缩机
Figure PCTCN2017070385-appb-000001
制冷剂连接管
Figure PCTCN2017070385-appb-000002
四通换向阀
Figure PCTCN2017070385-appb-000003
制冷剂连接管9——排风换热器2——制冷剂连接管9——节流装置5——制冷剂连接管9——送风换热器1——制冷剂连接管9——四通换向阀4——制冷剂连接管9——压缩机3。新鲜空气从新风口10被吸入后，经风道20，第一三通换向阀11，后从风道20被旁通不经过空气-空气板式换热器18。之后新风经第二三通换向阀12、送风风机13进入送风换热器1被冷却除湿，最后经送风口14送入房间或其他空气处理设备。室内排风从回风口15被吸入后，经风道20进入排风换热器5吸收制冷剂冷凝热，然后通过排风风机16、化霜电加热器17、空气-空气板式换热器18的第一空气通道至排风口19排出。
制热工况下，送风换热器1作为冷凝器，排风换热器5作为蒸发器，四通换向阀4使制冷剂连接管9连通，第一三通换向阀11及二三通换向阀12使风道20连通，化霜电加热器17在空气 -空气板式换热器18的第一空气通道结霜时短时间启动，化霜完成后关闭。制冷剂循环：压缩机3——制冷剂连接管9——四通换向阀4——制冷剂连接管9——送风换热器1——制冷剂连接管9——节流装置5——制冷剂连接管9——排风换热器2——制冷剂连接管9——四通换向阀4——制冷剂连接管9——压缩机3。新鲜空气从新风口10被吸入后，经风道20、第一三通换向阀11、风道20进入空气-空气板式换热器18，被排风预热。之后新风经第二三通换向阀12、送风风机13进入送风换热器1被加热，最后经送风口14送入房间或其他空气处理设备。室内排风从回风口15被吸入后，经风道20进入排风换热器5向制冷剂放热，然后通过排风风机16、化霜电加热器17，进入空气-空气板式换热器18的第一空气通道被进一步冷却，最后经风道20至排风口19排出。
实施例2
一种带再热功能的，适用于严寒地区的热泵型排风热回收新风空调机组，结构和流程如图2所示。在实施例1的基础上，增加了再热盘管6，再热电磁阀7，再热流量调节阀8，并补充了必要的制冷剂连接管，功能上增加了除湿再热工况。除湿工况是在制冷工况的基础上，开启再热电磁阀7，再热流量调节阀8。新风在送风换热器1中被冷却除湿后，经再热盘管6提高干球温度，保证送风舒适度。除湿工况适用于春秋季，温度适宜但湿度较大的天气条件。
与实施例1相比，实施例2增加了第二新风口21和第二排风口22，功能上除了在制冷工况下使新风不经过空气-空气板式换热器18外，还可使排风也不必经过空气-空气板式换热器18，从而降低排风风机16的功耗。
上述实施例中未完整展示制冷剂循环和风道的所有部件，实施过程中，选用不同制冷剂，在制冷剂回路设置高压储液器、气液分离器、油分离、过滤器、干燥器等常见制冷辅件，在水管设置过滤器，杀菌装置等水处理附件，在风道设置过滤器，消声器，辅助加湿器，辅助加热器，杀菌装置等空气处理附件，选用不同的送风喷口和回风格栅，改变风机位置，使用风阀替代风道三通换向阀或不脱离本发明技术方案的精神增加换热器，风机和风阀等，均不能视为对本发明进行了实质性改进，应属于本发明保护范围。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

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  1. 一种适用于严寒地区的热泵型排风热回收新风空调机组,其特征在于：包括送风换热器、排风换热器、压缩机、四通换向阀、节流装置、制冷剂连接管、新风口、第一三通换向阀、第二三通换向阀、送风风机、送风口、回风口、排风风机、化霜电加热器、空气-空气板式换热器、排风口、风道，所述新风口通过风道与第一三通换向阀导通，第一三通换向阀同时通过风道与第二三通换向阀相连，通过排风口与空气-空气板式换热器相连；所述第二三通换向阀同时通过排风口与空气-空气板式换热器相连，通过风道与送风风机相连，送风风机通过风道与送风换热器导通，送风换热器通过风道连接送风口；所述送风换热器通过制冷剂连接管分别与四通换向阀及节流装置连通，所述四通换向阀上设置压缩机，四通换向阀与节流装置以并行方式通过制冷剂连接管与排风换热器相连，排风换热器输入端通过风道连接回风口，输出端通过风道连接排风风机，排风风机上通过风道串行连接有化霜电加热器，并与空气-空气板式换热器相连。
  2. 根据权利要求1所述的一种适用于严寒地区的热泵型排风热回收新风空调机组，其特征在于：所述空气-空气板式换热器包括第一空气通道和第二空气通道，所述第一空气通道垂直于地面，通过风道与化霜电加热器和排风口连通，所述第二空气通道通过风道与三通换向阀连通。
  3. 根据权利要求2所述的一种适用于严寒地区的热泵型排风热回收新风空调机组，其特征在于：所述第一空气通道侧壁涂抹超疏水材料。
  4. 根据权利要求2所述的一种适用于严寒地区的热泵型排风热回收新风空调机组，其特征在于：所述第一空气通道侧壁布置电热丝。
  5. 根据权利要求1所述的一种适用于严寒地区的热泵型排风热回收新风空调机组，其特征在于：所述节流装置为毛细管、短管、热力膨胀阀或电子膨胀阀，通过制冷剂连接管与送风换热器，排风换热器和再热装置连通。
  6. 根据权利要求1所述的一种适用于严寒地区的热泵型排风热回收新风空调机组，其特征在于：还包括再热盘管、再热电磁阀及再热流量调节阀，所述再热盘管设置在送风换热器与送风口之间的风道上，再热盘管分别与再热电磁阀的输出端及再热流量调节阀的输入端相连，所述再热电磁阀的输入端与压缩机及四通换向阀向连通，所述再热流量调节阀的输出端连接在排风换热器与节流装置之间的风道上。
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