CN106091467B - A kind of wind pipe type CO2 air conditioner and heat pump units - Google Patents
A kind of wind pipe type CO2 air conditioner and heat pump units Download PDFInfo
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- 239000007788 liquid Substances 0.000 claims abstract description 97
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 238000004378 air conditioning Methods 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000007791 dehumidification Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000007789 gas Substances 0.000 abstract description 78
- 238000005485 electric heating Methods 0.000 abstract description 4
- 238000010257 thawing Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- 239000011261 inert gas Substances 0.000 abstract description 2
- 231100000344 non-irritating Toxicity 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000254 damaging effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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Abstract
本发明公开了一种风管式CO2空调热泵机组，包括第一气体冷却器、第二气体冷却器、液体四通换向阀、气液分离器、回热器、压缩机、喷射器、气体四通换向阀、蒸发器和风阀；本发明通过合理设置系统流程，实现通过控制机组的电磁阀，可以进行制冷、制热、除霜、除湿的模式转换。使得机组功能全面，满足了日常需要；本发明利用风阀和第二气体冷却器组合，代替了传统系统中的电加热器，减少了电加热这一能耗，提升了系统的性能；本发明采用CO2作为系统的工质，CO2属于惰性气体，无毒无刺激。
The invention discloses an air duct type CO2 air-conditioning heat pump unit, comprising a first gas cooler, a second gas cooler, a liquid four-way reversing valve, a gas-liquid separator, a regenerator, a compressor, an ejector, Gas four-way reversing valve, evaporator and air valve; the invention realizes the mode conversion of cooling, heating, defrosting and dehumidification by controlling the solenoid valve of the unit through reasonable setting of the system flow. The unit has comprehensive functions and meets the daily needs; the present invention uses the combination of the air valve and the second gas cooler to replace the electric heater in the traditional system, reduces the energy consumption of electric heating, and improves the performance of the system; the present invention CO2 is used as the working fluid of the system, CO2 is an inert gas, non-toxic and non-irritating.
Description
技术领域technical field
本发明属于空调热泵技术领域，特别涉及一种风管式CO2空调热泵机组。The invention belongs to the technical field of air-conditioning heat pumps, in particular to an air duct type CO2 air-conditioning heat pump unit.
背景技术Background technique
风管机组是将一个室外机和一个室内机之间用铜管相连，从室内机产生的冷风(暖风)引出送风管通向各个房间，再经过回风管送回室内机，经冷却(加热)并混合部分新风后再送出，是一种全新空气系统的中央空调。节能效果明显，风管空调热泵机组属于直冷式系统，蒸发温度较高，在其他条件一定的情况下，提高蒸发温度可以提高机组的效率和能效比。风管式单元空调机组容量较大，能够满足一户多居室的制冷(热)要求，补充新风很方便，送回风口的布置可以根据装修需要灵活进行，室内冷热风的分布均匀，空气环境舒适度较高。风管式单元空调机组的送风系统的使用在美国极为普遍，适合于美国居室高大宽敞、粗放的个性化需求。近些年，此种空调机组在一些经济发达的大城市如北京、上海等也有不少的使用实例，特别是一些高档的别墅建筑。但其缺点主要是噪音较大，有时需要考虑消音措施。系统安装较复杂，送回风管的布置既要占用一定的室内空间，又要室内吊项与之相配合，室内机也需要占用一定的室内面积或空间来放置，不大适合于中国的国情。各个房间送回风在提高室内环境舒适度的同时，也带来了各房间室内温、湿度不易调节的问题，当然也可以采用电动调节风阀，这又一方面增加了系统造价，另外也增加了系统调节和控制的难度和复杂性，对家庭使用来说终归是多花钱而又不便。The air duct unit connects an outdoor unit and an indoor unit with copper pipes, and the cold air (warm air) generated by the indoor unit is led out of the air supply pipe to each room, and then sent back to the indoor unit through the return air pipe, and cooled. (heating) and mixing part of the fresh air before sending it out. It is a central air conditioner with a new air system. The energy-saving effect is obvious. The air duct air-conditioning heat pump unit is a direct cooling system with a high evaporation temperature. Under certain other conditions, increasing the evaporation temperature can improve the efficiency and energy efficiency ratio of the unit. The air duct type unit air conditioner unit has a large capacity, which can meet the cooling (heating) requirements of a multi-room room. It is very convenient to supply fresh air. Higher comfort. The use of the air supply system of ducted unit air conditioners is very common in the United States, which is suitable for the tall, spacious and extensive individual needs of American homes. In recent years, this kind of air-conditioning unit has also been used in many economically developed cities such as Beijing and Shanghai, especially in some high-end villa buildings. But its main disadvantage is that it is noisy, and sometimes noise reduction measures need to be considered. The installation of the system is more complicated. The layout of the return air duct not only needs to occupy a certain amount of indoor space, but also requires indoor hanging items to match it. The indoor unit also needs to occupy a certain amount of indoor area or space for placement, which is not suitable for China's national conditions. . While the return air in each room improves the comfort of the indoor environment, it also brings about the problem that the indoor temperature and humidity of each room are not easy to adjust. Of course, electric dampers can also be used, which increases the cost of the system on the one hand, and also increases In addition to the difficulty and complexity of system regulation and control, it is more expensive and inconvenient for family use.
风管式单元空调机组根据其制热方式的不同主要有两种典型的安装方式：一种方式是采用风冷热泵型分体柜式空调机组，室内机箱辅助以插进式加热装置，可提供5kw-20kw的电热增量，通过四通阀的换向来实现冬夏工况的转换；另一种典型的安装方式是室内机组合进高效燃气加热炉、系统加湿器和电子过滤器，室外机则为风冷单冷型，随冬夏季节的转换实现供冷或供热。电子过滤器安装在回风总管上，而加湿器安装于送风总管上，用来在供热模式时向送风空气中添加水蒸汽，提高室内空气的湿度。There are two typical installation methods for ducted unit air conditioners according to their heating methods: one is to use air-cooled heat pump type split cabinet air conditioners, and the indoor chassis is assisted by a plug-in heating device, which can provide The electric heating increment of 5kw-20kw realizes the conversion of winter and summer working conditions through the reversing of the four-way valve; another typical installation method is that the indoor unit is combined with a high-efficiency gas heating furnace, system humidifier and electronic filter, and the outdoor unit is It is an air-cooled and single-cooled type, which realizes cooling or heating with the conversion of winter and summer. The electronic filter is installed on the return air main, and the humidifier is installed on the supply air main, which is used to add water vapor to the supply air in heating mode to increase the humidity of the indoor air.
传统的风管式空调热泵机组，大多使用R22，R134a等传统工质，环保性较差，面临逐渐被淘汰的趋势。系统在运行除湿模式时，需要开启辅助加热装置，对除湿后的空气进行加热，以达到舒适的温度。这样的辅助加热装置一方面使系统变得复杂，增加了设备成本，另一方面，提高了系统运行时的能耗，使系统制热效率降低。另外，传统的风管式空调热泵机组工作压力较低，使用喷射器的节能效果不明显，大量的膨胀功被浪费，系统性能较低。Most of the traditional ducted air-conditioning heat pump units use traditional working fluids such as R22 and R134a, which are poor in environmental protection and are facing a trend of being gradually eliminated. When the system is running in dehumidification mode, it is necessary to turn on the auxiliary heating device to heat the dehumidified air to achieve a comfortable temperature. On the one hand, such an auxiliary heating device complicates the system and increases the equipment cost; on the other hand, it increases the energy consumption during system operation and reduces the heating efficiency of the system. In addition, the working pressure of the traditional ducted air-conditioning heat pump unit is low, the energy-saving effect of using the ejector is not obvious, a large amount of expansion work is wasted, and the system performance is low.
发明内容Contents of the invention
本发明的目的在于提供一种风管式CO2空调热泵机组，利用CO2热泵型式进行制热，通过改变气体四通换向阀和液体四通换向阀，可以直接转变为制冷模式。除湿模式下不需要电加热，风阀打开，第二气体冷却器接入室内风路，对除湿后的空气进行加热，使其达到适宜的温度。系统利用喷射器作为增压泵，系统性能较高。The purpose of the present invention is to provide an air duct type CO2 air conditioner heat pump unit, which uses CO2 heat pump type for heating, and can be directly converted to refrigeration mode by changing the gas four-way reversing valve and the liquid four-way reversing valve. In the dehumidification mode, no electric heating is required, the air valve is opened, and the second gas cooler is connected to the indoor air circuit to heat the dehumidified air to a suitable temperature. The system uses the injector as a booster pump, and the system performance is high.
为了实现上述目的，本发明采用的技术方案是：In order to achieve the above object, the technical scheme adopted in the present invention is:
一种风管式CO2空调热泵机组，包括第一气体冷却器、第二气体冷却器、液体四通换向阀、气液分离器、回热器、压缩机、喷射器，气体四通换向阀、蒸发器和风阀；液体四通换向阀包括m端口、n端口、p端口和q端口四个端口；气体四通换向阀包括a端口、b端口、c 端口和d端口四个端口；压缩机的出口连接气体四通换向阀的c端口，a端口连接第二气体冷却器的入口；第二气体冷却器的出口连接第一气体冷却器的入口，第一气体冷却器的出口连接液体四通换向阀的p端口；q端口连接回热器的第二入口，然后连接到喷射器的喷嘴；喷射器的出口连接气液分离器的入口，气液分离器的液体出口连接液体四通换向阀的m端口，液体四通换向阀的n端口连接蒸发器的入口，蒸发器的出口连接气体四通换向阀的b端口，气体四通换向阀的d端口连接喷射器的引射口；气液分离器的气体出口连接回热器的第一入口，然后连接到压缩机的入口；风阀用于控制第二气体冷却器是否接入风管中。An air duct type CO2 air-conditioning heat pump unit, including a first gas cooler, a second gas cooler, a liquid four-way reversing valve, a gas-liquid separator, a regenerator, a compressor, an ejector, and a gas four-way reversing valve directional valve, evaporator and air valve; liquid four-way directional valve includes four ports of m port, n port, p port and q port; gas four-way directional valve includes four ports of a port, b port, c port and d port port; the outlet of the compressor is connected to the c port of the gas four-way reversing valve, and the a port is connected to the inlet of the second gas cooler; the outlet of the second gas cooler is connected to the inlet of the first gas cooler, and the The outlet is connected to the p port of the liquid four-way reversing valve; the q port is connected to the second inlet of the regenerator, and then connected to the nozzle of the ejector; the outlet of the ejector is connected to the inlet of the gas-liquid separator, and the liquid outlet of the gas-liquid separator Connect to the m port of the liquid four-way reversing valve, connect the n port of the liquid four-way reversing valve to the inlet of the evaporator, connect the outlet of the evaporator to the b port of the gas four-way reversing valve, and connect the d port of the gas four-way reversing valve Connect the injection port of the ejector; the gas outlet of the gas-liquid separator is connected to the first inlet of the regenerator, and then connected to the inlet of the compressor; the air valve is used to control whether the second gas cooler is connected to the air pipe.
进一步的，风阀能够左右拨动，在左边时为关闭，在右边时为打开；风阀打开，第二气体冷却器接入风管中；风阀关闭，第二气体冷却器不接入风管中。Further, the air valve can be toggled left and right, it is closed when it is on the left, and it is open when it is on the right; when the air valve is opened, the second gas cooler is connected to the air pipe; when the air valve is closed, the second gas cooler is not connected to the air pipe. tube.
进一步的，包括制冷模式：气体四通换向阀的c端口接通a端口，b端口接通d端口；液体四通换向阀的p端口接通q端口，m端口接通n端口；风阀处于左边。Further, it includes refrigeration mode: the c port of the gas four-way reversing valve is connected to the a port, the b port is connected to the d port; the p port of the liquid four-way reversing valve is connected to the q port, and the m port is connected to the n port; The valve is on the left.
进一步的，工质经过压缩机的压缩后，通过气体四通换向阀的c端口到a端口的路径进入第二气体冷却器，然后通过第一气体冷却器，经过液体四通换向阀的p端口到q端口的路径，流向回热器的第二入口，然后进入喷射器的喷嘴，在喷射器内部和引射流体混合后进入气液分离器；液体工质从气液分离器的液体出口流出，然后进入蒸发器，工质经过蒸发器后变成引射流体，进入喷射器的引射口；气体工质从气液分离器的气体出口流出，从回热器的第一入口流入，通过回热器，最后回到压缩机的入口。Further, after being compressed by the compressor, the working fluid enters the second gas cooler through the path from port c to port a of the gas four-way reversing valve, then passes through the first gas cooler, and passes through the liquid four-way reversing valve. The path from port p to port q flows to the second inlet of the regenerator, and then enters the nozzle of the injector, and enters the gas-liquid separator after being mixed with the injection fluid inside the injector; the liquid working medium from the liquid of the gas-liquid separator The outlet flows out, and then enters the evaporator, the working medium becomes ejection fluid after passing through the evaporator, and enters the injection port of the ejector; the gas working medium flows out from the gas outlet of the gas-liquid separator, and flows in from the first inlet of the regenerator , through the regenerator, and finally back to the inlet of the compressor.
进一步的，包括制热模式：气体四通换向阀的a端口连接d端口，c端口连接b端口；液体四通换向阀的m端口连接p端口，n端口连接q端口；风阀处于左边。Further, including the heating mode: the a port of the gas four-way reversing valve is connected to the d port, and the c port is connected to the b port; the m port of the liquid four-way reversing valve is connected to the p port, and the n port is connected to the q port; the damper is on the left .
进一步的，工质经过压缩机的压缩后，通过气体四通换向阀的c端口到b端口的路径进入蒸发器，然后通过液体四通换向阀的n端口-q端口路径，从回热器的第二入口进入回热器，然后工质进入喷射器的喷嘴，混合被引射流体，进入气液分离器；液体工质从气液分离器的液体出口流出，然后依次流入第一气体冷却器和第二气体冷却器，工质变成引射流体，通过气体四通换向阀的a端口到d端口的路径进入喷射器的引射口；气体工质从气液分离器的气体出口流出，从回热器的第一入口流入，通过回热器，最后回到压缩机的入口。Further, after being compressed by the compressor, the working fluid enters the evaporator through the path from port c to port b of the gas four-way reversing valve, and then passes through the n-port-q port path of the liquid four-way reversing valve, from the regenerative The second inlet of the device enters the regenerator, and then the working medium enters the nozzle of the injector, mixes the injected fluid, and enters the gas-liquid separator; the liquid working medium flows out from the liquid outlet of the gas-liquid separator, and then flows into the first gas in sequence In the cooler and the second gas cooler, the working medium becomes the injection fluid, which enters the injection port of the injector through the path from the a port to the d port of the gas four-way reversing valve; the gas working medium is discharged from the gas-liquid separator. The outlet flows out, flows in from the first inlet of the regenerator, passes through the regenerator, and finally returns to the inlet of the compressor.
进一步的，包括除湿模式：气体四通换向阀的c端口接通a端口，b端口接通d端口；液体四通换向阀的p端口接通q端口，m端口接通n端口；风阀处于右边。Further, it includes the dehumidification mode: the c port of the gas four-way reversing valve is connected to the a port, the b port is connected to the d port; the p port of the liquid four-way reversing valve is connected to the q port, and the m port is connected to the n port; The valve is on the right.
进一步的，工质经过压缩机的压缩后，通过气体四通换向阀的c端口到a端口的路径进入第二气体冷却器，然后通过第一气体冷却器，经过液体四通换向阀的p端口到q端口的路径，流向回热器的第二入口，然后进入喷射器的喷嘴，在喷射器内部和引射流体混合后进入气液分离器；液体工质从气液分离器的液体出口流出，然后进入蒸发器，工质经过蒸发器后变成引射流体，进入喷射器的引射口；气体工质从气液分离器的气体出口流出，从回热器的第一入口流入，通过回热器，最后回到压缩机的入口。Further, after being compressed by the compressor, the working fluid enters the second gas cooler through the path from port c to port a of the gas four-way reversing valve, then passes through the first gas cooler, and passes through the liquid four-way reversing valve. The path from port p to port q flows to the second inlet of the regenerator, and then enters the nozzle of the injector, and enters the gas-liquid separator after being mixed with the injection fluid inside the injector; the liquid working medium from the liquid of the gas-liquid separator The outlet flows out, and then enters the evaporator, the working medium becomes ejection fluid after passing through the evaporator, and enters the injection port of the ejector; the gas working medium flows out from the gas outlet of the gas-liquid separator, and flows in from the first inlet of the regenerator , through the regenerator, and finally back to the inlet of the compressor.
进一步的，气液分离器的液体出口通过节流阀连接液体四通换向阀的m端口。Further, the liquid outlet of the gas-liquid separator is connected to the m port of the liquid four-way reversing valve through a throttle valve.
进一步的，采用CO2作为工质。Further, CO 2 is used as the working fluid.
与现有技术相比，本发明有以下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
高压工作流体进入喷射器喷嘴，膨胀降压加速，将压力能转化为动能。同时，低压饱和蒸气作为被引射流体通过喷射器引射口，和工作流体一起在混合室内混合，降压加速，然后在扩压室内升压减速，动能转化为压力能，从而提升压力，提高机组性能的同时更加节能。The high-pressure working fluid enters the nozzle of the injector, and the expansion and depressurization are accelerated, and the pressure energy is converted into kinetic energy. At the same time, the low-pressure saturated steam passes through the injection port of the injector as the ejected fluid, and mixes with the working fluid in the mixing chamber. The depressurization is accelerated, and then the pressure is increased and decelerated in the diffuser chamber. The kinetic energy is converted into pressure energy, thereby increasing the pressure and increasing the pressure. While improving the performance of the unit, it is more energy-saving.
进一步的，利用风阀和第二气体冷却器组合，代替了传统系统中的电加热器，减少了电加热这一能耗，节约了系统造价，提升了系统的性能；通过对风阀开度的调节，可以更好的调节室温，使环境更加舒适。Furthermore, the combination of the air valve and the second gas cooler replaces the electric heater in the traditional system, which reduces the energy consumption of electric heating, saves the system cost, and improves the performance of the system; by controlling the opening of the air valve The adjustment can better adjust the room temperature and make the environment more comfortable.
进一步的，通过控制机组的电磁阀，可以进行制冷、制热、除霜、除湿的模式转换，使得机组功能全面，满足了日常需要。Furthermore, by controlling the solenoid valve of the unit, the modes of cooling, heating, defrosting, and dehumidification can be converted, so that the unit has comprehensive functions and meets daily needs.
进一步的，CO2属于惰性气体，无毒无刺激；良好的安全性和化学稳定性，安全无毒，不可燃，即便在高温下也不分解产生有害气体；其对全球变暖潜力指数GWP为1，CO2不需要工业合成，只需要在大气中提取就可以，使用方便；同时，它对大气臭氧层无任何破环作用， ODP为0。并且，CO2本身优越的热物理特性以及良好的迁移特性也适合其作为制冷工质。Further, CO 2 is an inert gas, non-toxic and non-irritating; good safety and chemical stability, safe, non-toxic, non-flammable, and does not decompose to produce harmful gases even at high temperatures; its global warming potential index GWP is 1. CO 2 does not require industrial synthesis, it only needs to be extracted in the atmosphere, which is convenient to use; at the same time, it has no damaging effect on the atmospheric ozone layer, and its ODP is 0. Moreover, the superior thermophysical properties and good migration properties of CO 2 are also suitable as a refrigerant.
进一步的，本发明制热方式采用CO2热泵型式，能源利用率更高，更加节能。CO2蒸发潜热较大，单位容积制冷量高，具有优良的流动和传热特性，可显著减小系统的尺寸，使整个系统非常紧凑，一定程度上解决了风管式空调占地较大的问题。利用喷射器作为增压泵具有明显的优势，能将高压工质的膨胀功转化为动能，然后再将动能转成压力能加以回收，以提高制冷系统性能。喷射器具有结构简单、成本低、无运动部件、适应两相流工况等优点。CO2空调热泵系统的工作压力较高，喷射器节能效果更加明显。本发明将CO2热泵的优秀环保性能和喷射器的高效节能效果结合在一起，符合目前对风管式空调热泵的要求，具有重要的节能环保意义，而且应用范围广。Further, the heating method of the present invention adopts the CO 2 heat pump type, which has a higher energy utilization rate and is more energy-saving. The latent heat of CO2 evaporation is large, the cooling capacity per unit volume is high, and it has excellent flow and heat transfer characteristics, which can significantly reduce the size of the system and make the whole system very compact, which solves the problem of large area occupied by ducted air conditioners to a certain extent. question. Using the ejector as a booster pump has obvious advantages. It can convert the expansion work of the high-pressure working medium into kinetic energy, and then convert the kinetic energy into pressure energy for recovery, so as to improve the performance of the refrigeration system. The injector has the advantages of simple structure, low cost, no moving parts, and adaptability to two-phase flow conditions. The working pressure of the CO2 air-conditioning heat pump system is higher, and the energy-saving effect of the ejector is more obvious. The invention combines the excellent environmental protection performance of the CO2 heat pump with the high efficiency and energy saving effect of the ejector, meets the current requirements for the air duct type air conditioning heat pump, has important energy saving and environmental protection significance, and has a wide application range.
附图说明Description of drawings
图1是本发明一种风管式CO2空调热泵机组的结构示意图；Fig. 1 is a kind of air duct type CO2 air-conditioning heat pump unit structural representation of the present invention;
图2是本发明一种风管式CO2空调热泵机组制冷模式下的结构示意图；Fig. 2 is a structural schematic diagram of an air duct type CO2 air-conditioning heat pump unit in cooling mode according to the present invention;
图3是本发明一种风管式CO2空调热泵机组制热模式下的结构示意图；Fig. 3 is a structural schematic diagram of an air duct type CO2 air-conditioning heat pump unit in heating mode according to the present invention;
图4是本发明一种风管式CO2空调热泵机组制除霜(除湿)模式下的结构示意图。Fig. 4 is a structural schematic diagram of a ducted CO2 air-conditioning heat pump unit in the defrosting (dehumidification) mode of the present invention.
具体实施方式detailed description
下面结合附图对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings.
请参阅图1，一种风管式CO2空调热泵机组，包括第一气体冷却器1、第二气体冷却器2、液体四通换向阀3、气液分离器4、回热器5、压缩机6、喷射器7、气体四通换向阀8、蒸发器9、风阀10和节流阀11；液体四通换向阀3包括m端口16、n端口17、p端口18和q端口19四个端口；气体四通换向阀8包括a端口12、b端口13、c端口14和d端口15四个端口；压缩机6的出口连接气体四通换向阀8的c端口，a端口连接第二气体冷却器2的入口；第二气体冷却器2的出口连接第一气体冷却器1的入口，第一气体冷却器1的出口连接液体四通换向阀3的p端口；q端口连接回热器5的第二入口，回热器5的第二出口连接到喷射器7 的喷嘴；喷射器7的出口连接气液分离器4的入口，气液分离器4的液体出口通过节流阀11 连接液体四通换向阀3的m端口，液体四通换向阀的n端口连接蒸发器9的入口，蒸发器9 的出口连接气体四通换向阀8的b端口，气体四通换向阀8的d端口连接喷射器7的引射口；气液分离器4的气体出口连接回热器5的第一入口，回热器5的第一出口连接到压缩机6的入口；风阀10、蒸发器9和第二气体冷却器设置于风管20中，风阀10用于控制第二气体冷却器2是否接入风管20中。Please refer to Figure 1, an air duct type CO2 air conditioning heat pump unit, including a first gas cooler 1, a second gas cooler 2, a liquid four-way reversing valve 3, a gas-liquid separator 4, a regenerator 5, a compressor Engine 6, injector 7, gas four-way reversing valve 8, evaporator 9, air valve 10 and throttle valve 11; liquid four-way reversing valve 3 includes m port 16, n port 17, p port 18 and q port 19 four ports; the gas four-way reversing valve 8 includes four ports of a port 12, b port 13, c port 14 and d port 15; the outlet of the compressor 6 is connected to the c port of the gas four-way reversing valve 8, a The port is connected to the inlet of the second gas cooler 2; the outlet of the second gas cooler 2 is connected to the inlet of the first gas cooler 1, and the outlet of the first gas cooler 1 is connected to the p port of the liquid four-way reversing valve 3; q The port is connected to the second inlet of the regenerator 5, and the second outlet of the regenerator 5 is connected to the nozzle of the ejector 7; the outlet of the ejector 7 is connected to the inlet of the gas-liquid separator 4, and the liquid outlet of the gas-liquid separator 4 passes through The throttle valve 11 is connected to the m port of the liquid four-way reversing valve 3, the n port of the liquid four-way reversing valve is connected to the inlet of the evaporator 9, the outlet of the evaporator 9 is connected to the b port of the gas four-way reversing valve 8, and the gas The d port of the four-way reversing valve 8 is connected to the injection port of the injector 7; the gas outlet of the gas-liquid separator 4 is connected to the first inlet of the regenerator 5, and the first outlet of the regenerator 5 is connected to the outlet of the compressor 6. Inlet; the air valve 10 , the evaporator 9 and the second gas cooler are arranged in the air pipe 20 , and the air valve 10 is used to control whether the second air cooler 2 is connected to the air pipe 20 .
风阀10能够左右拨动，在左边时为关闭，在右边时为打开；风阀10打开，第二气体冷却器2接入风管中；风阀10关闭，第二气体冷却器2不接入风管中。The damper 10 can be toggled left and right, it is closed when it is on the left, and it is opened when it is on the right; when the damper 10 is opened, the second gas cooler 2 is connected to the air pipe; when the damper 10 is closed, the second gas cooler 2 is not connected into the air duct.
为了保证机组在环境温度改变时满足供冷、供热的需求，解决了除湿和除霜的问题，本发明设置了三种运行模式：In order to ensure that the unit meets the needs of cooling and heating when the ambient temperature changes, and solves the problem of dehumidification and defrosting, the present invention sets three operating modes:
制冷模式：请参阅图2，气体四通换向阀8的c端口14接通a端口12，b端口13接通d端口15；液体四通换向阀3的p端口18接通q端口19，m端口16接通n端口17；风阀10 处于左边关闭状态，第二气体冷却器2不接入风管中。工质经过压缩机6的压缩后，通过气体四通换向阀8的c端口14到a端口12的路径进入第二气体冷却器2，然后通过第一气体冷却器1，经过液体四通换向阀3的p端口18到q端口19的路径，流向回热器5的第二入口，然后进入喷射器7的喷嘴，在喷射器内部和引射流体混合后进入气液分离器4；液体工质从气液分离器4的液体出口流出，经过节流阀11，然后进入蒸发器9，工质经过蒸发器9后变成引射流体，进入喷射器7的引射口；气体工质从气液分离器4的气体出口流出，从回热器5的第一入口流入，通过回热器5，最后回到压缩机6的入口。Cooling mode: Please refer to Figure 2, the c port 14 of the gas four-way reversing valve 8 is connected to the a port 12, the b port 13 is connected to the d port 15; the p port 18 of the liquid four-way reversing valve 3 is connected to the q port 19 , the m port 16 is connected to the n port 17; the air valve 10 is in the left closed state, and the second gas cooler 2 is not connected to the air pipe. After being compressed by the compressor 6, the working fluid enters the second gas cooler 2 through the path from the c port 14 to the a port 12 of the gas four-way reversing valve 8, and then passes through the first gas cooler 1, and passes through the liquid four-way reversing valve. The path from p port 18 to q port 19 of valve 3 flows to the second inlet of regenerator 5, then enters the nozzle of injector 7, and enters gas-liquid separator 4 after being mixed with the injection fluid inside the injector; liquid The working medium flows out from the liquid outlet of the gas-liquid separator 4, passes through the throttle valve 11, and then enters the evaporator 9. After passing through the evaporator 9, the working medium becomes ejection fluid and enters the ejection port of the ejector 7; the gas working medium It flows out from the gas outlet of the gas-liquid separator 4 , flows in from the first inlet of the regenerator 5 , passes through the regenerator 5 , and finally returns to the inlet of the compressor 6 .
制热模式：请参阅图3，气体四通换向阀8的a端口12连接d端口15，c端口14连接b端口13；液体四通换向阀3的m端口16连接p端口18，n端口17连接q端口19；风阀10 处于左边关闭状态，第二气体冷却器2不接入风管中。工质经过压缩机6的压缩后，通过气体四通换向阀8的c端口14到b端口13的路径进入蒸发器9，然后通过液体四通换向阀的n端口17-q端口19路径，从回热器5的第二入口进入回热器5，然后工质进入喷射器7的喷嘴，混合被引射流体，进入气液分离器4；液体工质从气液分离器4的液体出口流出，经过节流阀 11，然后依次流入第一气体冷却器1和第二气体冷却器2，工质变成引射流体，通过气体四通换向阀8的a端口12到d端口15的路径进入喷射器7的引射口；气体工质从气液分离器4的气体出口流出，从回热器5的第一入口流入，通过回热器5，最后回到压缩机6的入口。Heating mode: see Figure 3, port a 12 of gas four-way reversing valve 8 is connected to port d 15, port c 14 is connected to port b 13; port m 16 of liquid four-way reversing valve 3 is connected to port p 18, n Port 17 is connected to q port 19; the air valve 10 is in the closed state on the left, and the second gas cooler 2 is not connected to the air pipe. After being compressed by the compressor 6, the working fluid enters the evaporator 9 through the path from the c port 14 to the b port 13 of the gas four-way reversing valve 8, and then passes through the n port 17-q port 19 path of the liquid four-way reversing valve , enter the regenerator 5 from the second inlet of the regenerator 5, and then the working medium enters the nozzle of the ejector 7, mixes the injected fluid, and enters the gas-liquid separator 4; The outlet flows out, passes through the throttle valve 11, and then flows into the first gas cooler 1 and the second gas cooler 2 in sequence, the working medium becomes ejection fluid, and passes through the a port 12 of the gas four-way reversing valve 8 to the d port 15 The path enters the injection port of the ejector 7; the gas working medium flows out from the gas outlet of the gas-liquid separator 4, flows in from the first inlet of the regenerator 5, passes through the regenerator 5, and finally returns to the inlet of the compressor 6 .
除湿模式：请参阅图4，气体四通换向阀8的c端口14接通a端口12，b端口13接通d端口15；液体四通换向阀3的p端口18接通q端口19，m端口16接通n端口17；风阀处于打开状态，第二气体冷却器2接入风管中。工质经过压缩机6的压缩后，通过气体四通换向阀 8的c端口14到a端口12的路径进入第二气体冷却器2，然后通过第一气体冷却器1，经过液体四通换向阀3的p端口18到q端口19的路径，流向回热器5的第二入口，然后进入喷射器7的喷嘴，在喷射器内部和引射流体混合后进入气液分离器4；液体工质从气液分离器4的液体出口流出，经过节流阀11，然后进入蒸发器9，工质经过蒸发器9后变成引射流体，进入喷射器7的引射口；气体工质从气液分离器4的气体出口流出，从回热器5的第一入口流入，通过回热器5，最后回到压缩机6的入口。Dehumidification mode: Please refer to Figure 4, the c port 14 of the gas four-way reversing valve 8 is connected to the a port 12, the b port 13 is connected to the d port 15; the p port 18 of the liquid four-way reversing valve 3 is connected to the q port 19 , the m port 16 is connected to the n port 17; the air valve is in an open state, and the second gas cooler 2 is connected to the air pipe. After being compressed by the compressor 6, the working fluid enters the second gas cooler 2 through the path from the c port 14 to the a port 12 of the gas four-way reversing valve 8, and then passes through the first gas cooler 1, and passes through the liquid four-way reversing valve. The path from p port 18 to q port 19 of valve 3 flows to the second inlet of regenerator 5, then enters the nozzle of injector 7, and enters gas-liquid separator 4 after being mixed with the injection fluid inside the injector; liquid The working medium flows out from the liquid outlet of the gas-liquid separator 4, passes through the throttle valve 11, and then enters the evaporator 9. After passing through the evaporator 9, the working medium becomes ejection fluid and enters the ejection port of the ejector 7; the gas working medium It flows out from the gas outlet of the gas-liquid separator 4 , flows in from the first inlet of the regenerator 5 , passes through the regenerator 5 , and finally returns to the inlet of the compressor 6 .
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